Amgis

What Amgis does

Amgis LLC is a privately held, Houston-based manufacturer of toroidal transformers and magnetic components, organized as a Texas LLC with a workforce of 51-100 employees. The company's core technology is the doughnut-shaped toroidal magnetic core, which achieves 90-95% standard efficiency and up to 98% in custom designs — materially higher than sub-90% laminated transformers — while delivering 20-50% smaller size, lower stray losses, quieter operation, and easier mounting. The product portfolio is split into four families: standard toroidal products (medical grade, industrial general purpose, miniature, PCB-mount, fully enclosed MEDBOX/i-MEDBOX, and Amgis-KCC frequency converters), custom toroidal products (three-phase, medical isolation, industrial, audio, auto, high-efficiency, and inductor designs), standard high-frequency products (AC current sensors, inductors, common mode chokes, telecom transformers), and custom high-frequency products (current transformers up to 1 MHz, inductors/chokes/coils, SMPS transformers, pulse transformers, and high-temperature magnetics rated to 260°C).

Amgis generates revenue primarily through one-time hardware sales of custom and standard magnetic components, with pricing on a quote basis and no public price list. The go-to-market combines direct enterprise sales supported by a network of regional sales representatives across the US and Canada (MFI Electronics in NY, Frontier Component Sales in CO, T.H. Stewart in PA, Hill Technical Sales in IL, and Amgis PVT in San Diego), with small-quantity and individual orders fulfilled through the global Digi-Key Electronics distribution channel. End customers span medical equipment OEMs, audio equipment manufacturers, industrial and manufacturing firms, oil and gas operators, renewable energy integrators, telecommunications providers, data center operators, and commercial/residential lighting companies. Manufacturing is executed in ISO 9001:2015 certified facilities located in India and mainland China, while engineering, sales, and warehousing are concentrated at the Houston headquarters. The company holds UL 60601-1 listing, CB Test Certificate to IEC 60601-1 third edition, IPC/WHMA-A-620B Class 3 inspection certification, and is a member of The Transformer Association — credentials that anchor its position in regulated medical and industrial power-conversion applications.

Name

Amgis

Legal name

Amgis LLC

Website

https://amgistoroids.com

Company type

Private

Operating status

Operating

Headcount range

51–100 employees

Short description

Amgis is a privately held Houston-based manufacturer of custom and standard toroidal transformers, inductors, and magnetic components serving medical, industrial, audio, oil & gas, renewable energy, telecom, and data center OEMs globally.

Ownership category

akta.pro rank

Product category

Toroidal Transformers and Magnetic Components

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Power, Distribution & Specialty Transformers (3612), Electronic Coils, Transformers & Other Inductors (3677)

akta.pro primary industry

Transformers (Power, Distribution, Instrument, Specialty) (IMAGAAAA)

akta.pro secondary industries

Transformers & Magnetics (Power/Signal) (HDAHANAD), Instrument Transformers (CTs/VTs) & Sensors (Conventional/Optical) (EUADACAG)

Keywords

• Toroidal transformer manufacturing
• Magnetic components
• Custom power transformers
• Medical isolation transformers
• High frequency inductors

Headquarters

HQ city

Houston

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Custom Toroidal Transformers: Bespoke toroidal transformer manufacturing with custom voltage, power rating, mounting, and insulation specifications. Prototypes delivered in 2 weeks or less.
2. Standard Toroidal Products: Pre-engineered standard toroidal transformers for common voltage/power applications in VA ratings from 50 to 5000 VA. Faster availability and cost efficiency.
3. High-Frequency Magnetic Components: Standard and custom high-frequency inductors, chokes, current sensors, and telecom transformers for switching power supplies and high-frequency applications up to 1 MHz.
4. Enclosed Medical Transformers: MEDBOX and i-MEDBOX enclosed medical isolation transformers with UL 60601-1 listing, available in ratings from 300 VA to 1800 VA for North American and international markets.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Amgis designs and manufactures custom and standard toroidal transformers, inductors, chokes, current transformers, and high-frequency magnetic components for medical, industrial, audio, renewable energy, oil & gas, telecommunications, and lighting applications. Products span from miniature 1.6 VA PCB-mount transformers to custom designs rated up to 15 kVA single-phase and 45 kVA three-phase, with efficiency up to 98% and operating frequencies up to 1 MHz. The company offers enclosed medical isolation transformers (MEDBOX/i-MEDBOX) with UL 60601-1 listing and 48-hour quotation turnaround on custom designs.

Product overview

Amgis is a toroidal transformer manufacturer offering a comprehensive portfolio of magnetic power components organized into four main product categories: Standard Toroidal Products (pre-engineered transformers for common voltage/power applications), Custom Toroidal Products (customer-specified transformers and inductors), Standard High-Frequency Products (chokes, inductors, current sensors, and interface modules), and Custom High-Frequency Products (high-frequency magnetics designed to specific inductance and frequency specifications). The portfolio also includes specialized product lines such as the MEDBOX and i-MEDBOX enclosed medical transformers with UL 60601 listing, 50/60Hz Current Transformers and Sensors series (CP, CX, CCX, CT, ASM, CZ), and Amgis-KCC Frequency Converters. Products serve industries including medical, industrial, audio, renewable energy, oil and gas, telecommunications, and data centers, with power ratings ranging from miniature 1.6 VA transformers to custom designs rated up to 15 kVA and 98% efficiency.

Differentiator

Problem solved

Functional benefit

Brands

• MEDBOX: Fully enclosed medical grade isolation transformer product line for North American applications, bringing medical devices into compliance with UL 60601 standard
• i-MEDBOX
• Amgis-KCC

Products and services

• Custom Three-Phase Toroidal Transformers Three-phase toroidal transformers made up of three single-phase toroidal transformers offering flexible Delta-Delta, Delta-Wye, Wye-Wye, and Wye-Delta configurations for industrial power applications.
• Custom Medical Grade Isolation Toroidal Transformers Custom medical isolation transformers rated up to 15 kVA single-phase and 45 kVA three-phase with minimum 4 kV isolation between primary and secondary windings, compliant with UL 60601 and IEC 60601-1 standards for medical equipment OEMs.
• Custom Industrial Power Transformer Designs Custom toroidal isolation transformers for industrial applications offering 90-95% efficiency, lower leakage losses, cooler operating temperatures, and quieter operation compared to traditional laminated transformers.
• Custom Toroidal Auto Transformers Custom auto transformers 30-70% smaller than regular transformers because primary and secondary windings share turns, providing cost-effective voltage step-up or step-down when isolation is not required.
• Custom Audio Toroidal Transformers Custom-built audio toroidal transformers designed to minimize audible vibrations and hum, providing high sound quality and reliability for audio amplifier and headphone amplifier applications.
• Custom-Made High Efficiency Toroidal Transformers Custom toroidal transformers engineered to achieve up to 97-98% efficiency, running cooler with fewer power losses and eliminating the need for heat dissipation components like heat sinks or cooling fans.
• Custom Toroidal Inductors Custom 50/60 Hz toroidal inductors designed to inductance, current, size, and mounting specifications, offering quicker cooling, lower EMI, near complete magnetic field cancellation, and compact size.
• Split-Phase and Neutral-Forming Auto Transformers Custom auto transformers for efficient voltage conversion and phase balancing in solar, wind, and battery systems, built for reliability, compact design, and quiet performance.
• Medical Grade Transformer Series Standard medical grade isolation transformers with long life cycles used in hospitals and biomedical companies worldwide, rated 100-5000 VA with dual 120V outputs for 120/240V, 50/60 Hz input.
• Industrial-Grade General Purpose Toroidal Transformers General purpose toroidal transformers with dual 117V primaries for 120V or 240V operation, dual secondaries ranging from 2-12V to 2-120V, available in 100-3000 VA power ratings.
• Miniature 50/60 Hz Transformer Series Low-profile miniature transformers rated up to 50 VA for 115/230 V applications, center hole potted for easy mounting with M4 bolt, built to UL class A insulation system.
• PCB Mount Transformer Models Toroidal transformers fully encapsulated in plastic case designed for through-hole PCB mounting with built-in central screw receptacle accommodating M4/M5 machine screws, withstands elevated temperatures up to 70°C.
• MEDBOX Series - Enclosed Medical Transformers Fully enclosed medical grade isolation transformers with UL 60601 listing, available in 300-1800 VA ratings with built-in RFI filtering, inrush current protection, and surge suppression for North American 120V/60Hz operations.
• i-MEDBOX Series - International Medical Transformers International medical isolation transformers designed for 120/240V 50/60Hz operations with IEC power entry connectors, available in 300VA, 600VA, and 1000VA ratings.
• Amgis-KCC Frequency Converters Enclosed frequency converters developed in partnership with KCC Scientific, providing clean power for devices up to 200 watts for use anywhere in the world.
• Custom Current Transformers and Current Sensors Custom high-frequency current transformers and sensors designed for operating frequencies up to 1 MHz, using special core materials such as ferrites for high magnetic permeability.
• Custom Inductors, Chokes, and Coils Custom high-frequency inductors, chokes, and coils designed for inductance, current capacity, and frequency specifications up to 1 MHz, including air-core inductors and common mode chokes.
• Custom Switch Mode Power Supply (SMPS) Transformers Custom transformers and energy storing inductors for switch mode power supplies supporting Buck, Boost, Buck-boost, Flyback, Push-pull, Half-bridge, and Full-bridge configurations with Litz wire options for high frequencies.
• Custom Pulse Transformers Custom pulse transformers for signal transmission applications working with pulsating DC signals, featuring low leakage inductance and capacitance for clean, reliable signal delivery.
• Custom High Temperature Magnetic Components High-frequency magnetics designed for extreme environments with temperatures up to 260°C and high vibration levels, constructed with vacuum varnish coatings, high temperature tapes (Kapton), and Teflon stranded leads.
• CP Series Current Transformers Compact current sensors with 0.2% accuracy typical, operating temperature range -40°C to +120°C, primary to secondary insulation 2.5 kV AC, fully encapsulated and RoHS compliant.
• CX Series Current Transformers High output voltage monitoring current transformers in small package with high saturation current and good linearity over current range.
• CCX Series Current Transformers Current transformers monitoring up to 150 Amps with typically 1% accuracy rate, high turns ratio 2500:1, primary to secondary insulation 4 kV AC.
• CT Series Current Transformers Current transformers for electrical monitoring from 5-200A with primary to secondary insulation 4 kV AC.
• ASM Series Current Sensors Fully-encapsulated thru-hole current sensors designed to monitor electrical ranges from 1-100 A with ±10% output voltage tolerance.
• AC Current Sensor Series Low-cost current sensors for control systems and AC current monitoring/measuring applications, operating frequency range 20 kHz to 200 kHz with 2500 Vac isolation between primary line and secondary winding.
• Standard High-Frequency Inductors Standard high-frequency inductors and chokes designed for switching frequencies of 50 kHz, 150 kHz and 260 kHz, available for surface mount and through-hole applications.
• Common Mode Chokes High efficiency common mode chokes that filter in-phase supply lines to help equipment meet strict electrical radiation specifications, blocking high-frequency common mode current noise.
• Telecom Transformers MUJ Series of SMD interface modules that comply with CCITT.I.430 standard and are compatible with common integrated circuit layouts, designed for pick and place compatibility.
• CZ Series Flying Lead Transformers CZ series flying lead transformers (CZ-0500, CZ-0750, CZ-1000) engineered for high current in a compact design.

Quantifiable outcome

• 90-98% efficiency vs. less than 90% for laminated transformers
• +5 more outcomes

Segments8 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Digi-Key ElectronicscoreChannel Partner/ Reseller/ DistributorDigi-Key is a worldwide distributor of select Amgis products. For small quantities and individuals, Digi-Key provides access to Amgis standard toroidal transformers and components.

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Coilcraft: Coilcraft designs and manufactures custom and standard inductors, transformers, and RF magnetics for power, telecommunications, and high-frequency applications. Comparable to Amgis's standard and custom high-frequency inductors, chokes, and SMPS transformer portfolio, including distribution-led sales.
• Bourns, Inc. Bourns manufactures inductive components including transformers, chokes, and coils for power conversion, telecom, automotive and industrial markets. Comparable to Amgis in magnetics components across power and high-frequency applications with custom-engineering capability.
• Hammond Manufacturing: Hammond Manufacturing produces a broad portfolio of standard and custom transformers, chokes and inductors for industrial, electronic and electrical equipment markets. Directly comparable to Amgis as a North American transformer and magnetics manufacturer with overlapping custom-engineering capabilities and standard product lines.
• Triad Magnetics: Triad Magnetics designs and manufactures custom and standard magnetics including audio, medical isolation, and power transformers, plus inductors and chokes. Closely comparable to Amgis in product scope (audio, medical, industrial), custom-engineering model, and UL/IEC medical certification focus.
• Wurth Elektronik: Wurth Elektronik manufactures a broad range of inductors, chokes, transformers and power magnetics for industrial, telecom, renewable and consumer applications. Comparable to Amgis in catalog and custom magnetic components, especially common-mode chokes, inductors, and current sensors.
• Signal Transformer (Bel Fuse): Signal Transformer, a division of Bel Fuse, manufactures standard and custom transformers, inductors and chokes for industrial, audio and power-conversion applications. Directly comparable to Amgis in transformer and inductor categories sold through distribution channels to OEM customers.
• Pulse Electronics: Pulse Electronics (a Yageo company) manufactures custom magnetics, including isolation transformers, telecom transformers, current sensors, and power inductors for industrial, networking, and power applications. Directly comparable to Amgis in telecom transformers, current sensors, and high-frequency magnetic components.

Others

• Digi-Key Electronics: Digi-Key is a global electronics distributor that carries Amgis standard products and represents the company's primary low-volume and individual-buyers sales channel. Listed as an ecosystem/distribution partner rather than a direct competitor, sharing go-to-market reach with Amgis.

Broad incumbents

• Eaton (Magnetics / Power Components): Eaton is a large diversified industrial manufacturer producing electrical components including transformers, inductors, and power-quality equipment. A broader incumbent where its magnetics-related product lines overlap with Amgis's custom toroidal offerings for industrial customers.
• TDK (Lambda / Magnetics): TDK is a major global manufacturer of magnetic components, including power, signal and high-frequency inductors and transformers, serving automotive, industrial, telecom and renewable markets. A broader incumbent with overlapping transformer and magnetics categories versus Amgis's specialty toroidal focus.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/watch?v=gI6e75wrSj4
• Xx.com/amgistoroids

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Amgis