Filter Networks

What Filter Networks does

Filter Networks is a privately held manufacturer headquartered in Milwaukee, Wisconsin, specializing in RFI and EMI components and subsystems, with firmographic data indicating a 1979 founding and an 11-50 employee headcount band. The company's product portfolio spans barrier terminal blocks, PCB terminal blocks, EMI/RFI power line filters, power supplies (including an associated Tri-Mag line), custom molded electrical components, and military/ITAR-registered filters including TEMPEST-rated line filters. Manufacturing is conducted entirely in-house, covering plastic injection molding, transfer molding, and fabrication, which provides vertical control from product design through finished goods.

The company addresses a diverse set of end markets including industrial, instrumentation, telecom, medical, aerospace, military and defense, commercial, appliance, and machinery. Military and ITAR-qualified product lines address defense and aerospace applications requiring secure, interference-resistant power filtering, including TEMPEST-rated units. The business is built around a dual catalog/custom model: standard catalog components are sold through established electronic component distributors, while custom designs are produced to customer specifications using in-house tooling and molding capabilities.

Filter Networks monetizes primarily through direct hardware sales of standard catalog electrical components and custom-manufactured components priced to specification. Go-to-market is supported by a website with parametric search and distributor stock-checking functionality, complemented by a network of manufacturer representatives and major distributors including Digi-Key, Heilind, and Master Electronics. The company holds ISO 9001:2015, ITAR, UL, CSA, TUV, RoHS, and REACH certifications, which together qualify its products for regulated and defense end markets. No AI, software, or recurring-revenue components are evident in the offering.

Name

Filter Networks

Legal name

Curtis Industries

Website

https://filternetworks.com

Company type

Private

Founded year

1935

Operating status

Operating

Headcount range

11–50 employees

Short description

Filter Networks is a Milwaukee-based private manufacturer of RFI/EMI filters, terminal blocks, power supplies, and custom molded electrical components, serving industrial, aerospace, military, medical, telecom, and commercial sectors via catalog and custom sales.

Ownership category

akta.pro rank

Headquarters

HQ city

Milwaukee

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Standard Electrical Components: Sale of standard terminal blocks, EMI/RFI filters, and power supplies through distribution channels.
2. Custom Electrical Components: Design and manufacture of custom electrical components to customer specifications, including custom molded components and custom designed terminal blocks and filters.
3. Military/TEMPEST Products: Specialized military-grade products including ITAR-compliant filters and TEMPEST line filters for defense applications.

Go-to-market motion1 record

Distribution channels10 records

Marketing channels3 records

Core offering

Filter Networks manufactures standard and custom electrical components including barrier terminal blocks, PCB terminal blocks and connectors, EMI/RFI power line filters (single-phase, three-phase, DC, power entry modules, medical-grade), Tri-Mag power supplies, custom molded electrical components, and military/ITAR TEMPEST line filters. All products are produced in-house from plastic injection and transfer molding through fabrication and testing, and are sold direct and through a worldwide network of electronic component distributors.

Product overview

Curtis Industries is a specialized manufacturer of standard and custom electrical components, primarily serving industrial, instrumentation, telecom, medical, commercial, appliance, machinery, aerospace, and military sectors. The product portfolio centers on three core product lines — Barrier Terminal Blocks (single-row, dual-row, Euro-style, high-voltage/high-current), PCB Terminal Blocks (single-level, multi-level, spring connection, and plug-in variants across multiple profile heights), and EMI/RFI Filters (single-phase, three-phase, DC, power entry modules, and medical-grade). These are complemented by Tri-Mag Power Supplies, Custom Molded Electrical Components manufactured in-house, and Military & ITAR Filters. The company operates as a unified manufacturing operation — producing parts from start to finish including plastic injection, transfer molding, and fabrication — and also distributes products through distributors such as Digi-Key and Heilind.

Differentiator

Problem solved

Functional benefit

Brands

• TRI-MAG: Power supplies brand operated by Curtis Industries

Products and services

• Barrier Terminal Blocks Single-row and dual-row barrier terminal blocks that provide secure wire connections for industrial and commercial electrical applications.
• PCB Terminal Blocks Printed circuit board terminal blocks and connectors in single-level (mini, low, medium, high profile), spring connection, multi-level, and plug-in variants, plus PCB extruded and modular supports for board-mount wiring.
• EMI/RFI Power Line Filters Electromagnetic interference (EMI) and radio frequency interference (RFI) power line filters including single-phase general purpose and high-performance/wide-band filters, three-phase filters, DC filters, power entry modules (filtered combination, general purpose, standard cutouts), and medical-grade filtered modules and IEC sockets.
• Tri-Mag Power Supplies Power supply units manufactured and marketed under the Tri-Mag brand and distributed through Filter Networks' channels for industrial and OEM power applications.
• Custom Molded Electrical Components Custom molded electrical components manufactured in-house from plastic injection and transfer molding through fabrication, designed to meet specific customer specifications for industrial, commercial, and specialty applications.
• Military & ITAR TEMPEST Line Filters TEMPEST line filters and ITAR-registered military-grade electrical filters designed for defense and aerospace applications requiring secure communications and ruggedized components.

Quantifiable outcome

• Industry unsurpassed first pass yield on new designs

Segments9 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• Digi-Key CorporationcoreChannel Partner/ Reseller/ DistributorMajor global electronic component distributor offering Curtis Industries products through online catalog with real-time stock checking capabilities.
• Beyond ComponentsminorChannel Partner/ Reseller/ DistributorRegional electronic component distributor offering Curtis Industries products in their distribution network.
• Walker ComponentminorChannel Partner/ Reseller/ DistributorRegional distributor providing Curtis Industries products to customers in their territory.
• Heilind ElectronicscoreChannel Partner/ Reseller/ DistributorGlobal distributor specializing in interconnect and electromechanical products, offering Curtis Industries terminal blocks and filters through their distribution network.
• Kimball ElectronicsminorChannel Partner/ Reseller/ DistributorRegional distributor and electronics manufacturing services provider offering Curtis Industries components.
• Steven EngineeringminorChannel Partner/ Reseller/ DistributorRegional manufacturer representative and distributor serving western United States with Curtis Industries products.
• Hughes Peters CorporationminorChannel Partner/ Reseller/ DistributorRegional manufacturer representative and distributor for Curtis Industries products.
• Master ElectronicsminorChannel Partner/ Reseller/ DistributorElectronic components distributor offering Curtis Industries products with online ordering capabilities.
• Online ComponentsminorChannel Partner/ Reseller/ DistributorOnline marketplace for electronic components, offering Curtis Industries products through their e-commerce platform.
• Voyager CorpminorChannel Partner/ Reseller/ DistributorElectronic component distributor offering Curtis Industries products through their distribution network.
• Tri-MagcoreChannel Partner/ Reseller/ DistributorTri-Mag power supplies are offered as part of Curtis Industries product portfolio, sold under the Curtis Industries brand.

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Schneider Electric: Global electrical equipment and automation company with terminal blocks, filters, and power distribution products across industrial, medical, telecom, and commercial verticals—broad incumbent overlap with Curtis.
• ABB: Global electrical equipment manufacturer with products spanning terminal blocks, power supplies, and industrial control components—operates across Curtis's industrial and infrastructure verticals at much larger scale.
• TE Connectivity: Global manufacturer of connectivity and sensor solutions including terminal blocks, filters, and relays—operates across every vertical Curtis serves but at vastly greater scale and broader product breadth.
• Molex: Global manufacturer of electronic interconnect solutions including PCB terminal blocks, headers, and connectors—competes directly with Curtis's PCB terminal block product family.
• Eaton: Diversified power management company producing terminal blocks, filters, surge protection, and industrial controls—broader portfolio but directly overlaps Curtis's industrial power component offerings.

Direct peers

• Schurter: Swiss-based manufacturer of EMI/RFI filters, power entry modules, fuses, and circuit protection devices with medical-grade and industrial product lines—directly comparable to Curtis's filter portfolio.
• Phoenix Contact: German-headquartered specialist in terminal blocks, PCB connectors, and industrial automation components—directly competes with Curtis's barrier and PCB terminal block lines across industrial verticals.
• TDK (TDK-Lambda): Manufacturer of power supplies and EMI filters for industrial, medical, and test & measurement applications—a direct comp to Tri-Mag power supplies and Curtis's filter business.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

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 Filter Networks