What GB International does

GB International is a privately held U.S.-based manufacturer of custom magnetic components, founded in 1986 and headquartered in Endicott, New York. The company designs and produces custom transformers (toroidal, planar, and bobbin-wound configurations) and inductors (toroidal, planar, AEC-Q200 qualified, and power bead series), with thermal encapsulation offered as both an integrated capability and a standalone service. Its underlying technology centers on precision winding, thermal management via potting and encapsulation, and proprietary UL-recognized insulation systems (File #E13785, classes GBI-B-130 through GBI-B-240 at up to 600V). The company operates a dual-site manufacturing model: U.S. engineering, prototyping, and qualification in Endicott, NY paired with scalable production in Huizhou, China (established 2005).

The company's product portfolio spans high-voltage transformers, SMT flyback and current sense transformers, 7KW-class common mode chokes, PFC inductors with X-Flux cores, and molded bobbins and custom assemblies. Key certifications include ISO 9001, IATF 16949 (Huizhou facility), AEC-Q200 automotive qualification, UL recognized insulation systems, and military specification compliance (MIL-PRF-27, MIL-STD-202, J-STD-002). GB International serves automotive (EV and hybrid platforms, including named work for Jaguar Land Rover), industrial power systems, grid stabilization, aerospace and defense, and energy infrastructure markets. Products are designed for demanding reliability profiles, with automotive components specified for 300,000 KM (15-year) lifespans.

The business operates on a direct sales model with custom, quote-based pricing and multi-year contracts typical of OEM supply relationships. Revenue is generated through hardware sales of custom magnetic components, supplemented by engineering services (design review, prototyping, failure mode analysis) and thermal encapsulation services. The go-to-market is engineering-led: customers engage through the website contact form, direct phone/email, or sales team outreach, with collaborative design from schematic through prototype to production. The company has delivered 400+ custom designs and produces 100,000+ units annually. No public pricing exists; all orders are quoted based on design complexity, volume, and specifications.

Name

GB International

Legal name

GB International

Website

https://gbint.com

Company type

Private

Founded year

1986

Operating status

Operating

Headcount range

251–500 employees

Short description

GB International is a U.S.-based manufacturer of custom transformers and inductors, founded in 1986 and operating dual manufacturing sites in Endicott, NY and Huizhou, China, serving automotive (EV/hybrid), industrial power, grid stabilization, aerospace and defense, and energy infrastructure OEMs.

Ownership category

akta.pro rank

Product category

Custom Magnetic Components (Transformers and Inductors)

NAICS

Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416), 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

Automotive Charging Hardware Manufacturing (On-board Chargers, Charge Inlets, DC-DC) (IMACAJAK), Power Electronics Manufacturing (Inverters/DC-DC/Onboard Chargers) (IMACACAD), EV/Industrial Charging Power Electronics (Chargers, rectifiers, power stages) (IMAGADAF)

Keywords

• Custom transformers manufacturing
• Magnetic components design
• Power inductors production
• Thermal encapsulation services
• Automotive magnetics supplier

Headquarters

HQ city

Endicott

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Magnetic Component Manufacturing: Design and manufacture of custom transformers and inductors for high-demand industries. Revenue is generated through custom orders tailored to specific customer requirements, with pricing based on design complexity, volume, and specifications.
2. Engineering Services: Engineering collaboration, design reviews, prototyping, cost-reduction design reviews, and qualification testing services supporting the custom magnetic component business.
3. Thermal Encapsulation Services: Thermal encapsulation offered as standalone service for customers requiring enhanced durability, thermal control, or environmental sealing, integrated into transformer and inductor programs.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

GB International designs and manufactures custom transformers (toroidal, planar, bobbin-wound) and inductors for high-performance power electronics applications. The company provides engineering collaboration from schematic through prototype to high-volume production, complemented by thermal encapsulation, failure-mode analysis, and qualification testing. Products are built to automotive (AEC-Q200), industrial, grid, and military-grade specifications for OEMs and Tier 1 suppliers.

Product overview

GB International is a U.S.-based manufacturer of custom transformers and inductors offering a comprehensive portfolio of precision magnetic components. The product portfolio centers on three core product categories: Transformers (including toroidal, planar, bobbin-wound, and high-voltage designs), Inductors (toroidal, planar, AEC-Q200 qualified, and EMI suppression types), and Thermal Encapsulation services. Supporting these core offerings are the Power Bead Series (compact high-current inductors), Surface-Mount Components, and Molded Parts & Custom Manufacturing services. The company also provides custom engineering services, prototyping, and failure mode analysis. Products serve demanding industries including automotive (EV and hybrid platforms), industrial power systems, grid stabilization, aerospace, and defense. The portfolio includes specific part numbers like the Flyback Transformer (11554-GR), 7KW Common Mode Choke (11545-GR), and 40 AMP Surface Mount Current Sense Transformer (11336-GR), among many custom-engineered solutions.

Differentiator

Problem solved

Functional benefit

Products and services

• Transformers Custom toroidal, planar, and bobbin-wound transformers for industrial, EV, and high-performance applications. Includes copper stack-up planar transformers and high-voltage transformers for aerospace and defense. Sold to OEMs and Tier 1 suppliers with engineering collaboration from schematic to prototype to production.
• Inductors Wide range of inductors including toroidal, bobbin-wound, planar (PCB-based), and AEC-Q200 qualified inductors engineered for reliability and performance in automotive, industrial, and grid applications.
• Thermal Encapsulation Services Thermal encapsulation and potting services for transformers and inductors, providing heat dissipation, environmental durability, vibration stabilization, and protective coatings. Applied to EV charger components, military-grade products, and industrial-grade environments using application-specific material selection.
• Power Bead Series Inductors Compact, high-current power bead inductors for demanding power electronics applications including EV, industrial systems, and telecom. Wide range of inductance values with optimized thermal properties and AEC-Q200 qualified options.
• Surface-Mount Components (SMT Transformers and Inductors)
• Molded Parts & Custom Manufacturing Precision-molded bobbins, toroid retainers, and custom assemblies tailored to customer specifications, with vertical integration capabilities.
• Custom Transformers & Inductors Engineering Service Custom-engineered magnetic solutions for electric vehicles, industrial systems, and aerospace and defense applications, from concept to production. Includes design reviews, prototyping, cost-reduction design reviews, and qualification testing services.
• Failure Mode Analysis Service Root cause analysis for returned or failed magnetic components, analyzing stress, heat, vibration, and EMI factors to inform design and process improvements.

Quantifiable outcome

• 400+ custom designs delivered
• +3 more outcomes

Named customers1 record

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Five partnerships are on record, tiered core and minor.

• TRAFTORcoreStrategic or Co-development PartnerTRAFTOR is listed as a partner in the 'Our Partners' section. They partner to expand design capabilities and strengthen engineering support.
• AMT (Alliance for Manufacturing and Technology)coreStrategic or Co-development PartnerAMT is listed as a partner in the 'Our Partners' section. They partner to strengthen engineering support and build valuable industry connections.
• Binghamton UniversityminorStrategic or Co-development PartnerBinghamton University is listed as a partner in the 'Our Partners' section. Partnership supports industry connections and collaborative opportunities.
• ProtologixminorStrategic or Co-development PartnerProtologix is listed as a partner in the 'Our Partners' section. Partnership supports design capabilities and industry connections.
• PatchCo MachineminorStrategic or Co-development PartnerPatchCo Machine is listed as a partner in the 'Our Partners' section. Partnership supports expanding design capabilities and building industry connections.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Vishay Intertechnology: Vishay manufactures a broad discrete semiconductor and passive component portfolio including inductors and transformers, serving automotive and industrial power markets where GB International also competes — albeit as a focused niche specialist versus Vishay's full-portfolio offering.
• Murata Manufacturing: Murata is a leading global manufacturer of passive electronic components including power inductors and transformers for automotive and industrial power applications — a much larger incumbent that overlaps with GB International's inductor and transformer product lines in EV and industrial markets.
• TDK Corporation: TDK is a global electronics giant with a leading magnetics portfolio spanning power transformers, inductors, and EMC components across automotive, industrial, and consumer — a much larger incumbent competing with GB International across overlapping product categories.

Direct peers

• Sumida Corporation: Sumida is a Japan-headquartered manufacturer of automotive-grade transformers and inductors with significant EV and hybrid powertrain exposure, including DC-DC converters and onboard chargers — a closely aligned competitor to GB International in custom magnetics for electrified vehicles.
• Standex Electronics: Standex Electronics designs and manufactures custom magnetics including transformers and inductors for automotive, aerospace/defense, and industrial power markets, with a custom-engineering sales model closely paralleling GB International's collaborative engineering approach.
• Pulse Electronics: A subsidiary of Yageo Group, Pulse Electronics designs and manufactures custom and standard transformers, inductors, and other magnetic components for automotive, industrial, and communications end markets — directly competing with GB International's custom magnetics offering for similar Tier-1 and OEM customers.
• Würth Elektronik: Würth Elektronik manufactures a broad portfolio of power inductors, transformers, and chokes with strong focus on automotive-qualified magnetics and power electronics applications — directly comparable to GB International's AEC-Q200 inductor and transformer business serving EV and industrial OEMs.
• Coilcraft: Coilcraft is a US-based manufacturer of RF, power, and signal magnetics including custom and standard inductors and transformers for automotive, industrial, and telecom markets — directly comparable to GB International in custom magnetic component design and manufacturing.
• Eaton (Coiltronics brand): Eaton's Coiltronics-branded magnetics business offers power inductors and transformers for industrial power and automotive applications, serving a similar customer base and overlapping with GB International's industrial power systems and EV customer segments.

Emerging players

• Cynergy3 (Sensata Technologies): Cynergy3, a Sensata brand, manufactures custom magnetics and sensor-based components serving industrial and selected automotive markets, partially overlapping with GB International's custom-magnetics-and-engineering-services business model for non-traditional magnetic applications.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/gb-international-transformers/posts/?feedView=all

Compliance12 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

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 GB International