Custom Connector

What Custom Connector does

Custom Connector Corporation is a privately held American manufacturer of electro-mechanical interconnect devices, headquartered and operating entirely from a single facility at 1821 East 40th Street, Cleveland, Ohio. Founded in 1969, the company produces four core product lines — industrial relay sockets, automotive relay sockets, electronic packaging products, and custom-designed electro-mechanical interconnect devices — supported by a catalog of DIN rails, DIN rail accessories, terminal blocks, and switch connectors. The firm self-positions as the largest relay socket manufacturer in the United States and the holder of the broadest relay socket line in the world, spanning series such as OT, ST, MT, GT, ES, EC, SD, SS, RB, OB, CM, MR, and GR for industrial use and BR, PR, VR, and PW for automotive ISO relay configurations.

Underlying technology is conventional electro-mechanical engineering rather than software or AI: products are designed in CAD and SolidWorks, prototyped using 3-D technology, and manufactured from break-resistant thermoplastic (industrial) and heat-stabilized thermoplastic (automotive) to meet durability and high-temperature requirements. Quality and market access are supported by an ISO 9001:2015 certified quality management system and a broad compliance footprint including UL recognition, CSA certification, CE marking, REACH compliance, RoHS 3.0, and RMI/CMRT responsible minerals conformance. Design engineers provide application-specific solutions ranging from light-duty printed circuit board applications through heavy-duty hard-wiring problems, including forcible-guided sockets used in safety-critical applications such as crane lift control.

The business model is hardware sales of proprietary relay socket and connector SKUs, with revenue generated through an exclusive channel of factory authorized distributors across US market areas, supplemented by direct phone and email inbound sales for quotes, technical support, and custom inquiries. Pricing is not publicly disclosed; transactions are project-quoted per customer specification. Customer segments are horizontally segmented into industrial equipment manufacturers, the automotive industry, and electronics packaging users, with the industrial and automotive segments identified as primary. The company is privately held, does not appear on any stock exchange, has no disclosed institutional investor base, and reports 11-50 employees.

Name

Custom Connector

Legal name

Custom Connector Corporation

Website

https://customconnector.com

Company type

Private

Founded year

1969

Operating status

Operating

Headcount range

11–50 employees

Short description

Custom Connector Corporation, founded 1969 in Cleveland, Ohio, manufactures industrial and automotive relay sockets, electronic packaging, terminal blocks, and custom electro-mechanical connectors, serving industrial equipment OEMs and automotive customers through factory authorized US distributors.

Ownership category

akta.pro rank

Product category

Electromechanical Connectors

NAICS

Electronic Connector Manufacturing (334417), Relay and Industrial Control Manufacturing (335314), Wiring Device Manufacturing (33593)

SIC

Electronic Connectors (3678), Electronic Components & Accessories (3670), Electronic Components, Nec (3679)

akta.pro primary industry

Connectors & Interconnect Components (Industrial connectors, terminals, sockets, backplane) (IMAGAJAC)

Keywords

• Relay sockets manufacturing
• Electromechanical interconnect devices
• Automotive relay connectors
• Electronic packaging products
• Terminal blocks

Headquarters

HQ city

Cleveland

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Relay Sockets Sales: Sale of industrial relay sockets for DIN rail, panel, and PCB mounting applications. Products are sold through factory authorized distributors and direct inquiries.
2. Automotive Relay Sockets Sales: Sale of automotive relay sockets and connectors for mini, micro, and maxi ISO relays.
3. Electronic Packaging Products: Sale of electronic packaging products including enclosures, encapsulation shells, and plug-in configurations.
4. Custom Designed Products: Custom designed and manufactured electro-mechanical interconnect devices based on customer specifications.
5. Terminal Blocks: Sale of G Series terminal blocks.
6. DIN Rails and Accessories: Sale of aluminum and steel DIN rails, support brackets, hold down springs, and rail mounting clamps.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Custom Connector manufactures electro-mechanical interconnect devices, with a core focus on industrial relay sockets, automotive relay sockets and connectors, and electronic packaging products. The company also produces terminal blocks, DIN rails and accessories, switch connectors, and custom-designed electro-mechanical interconnect devices built to customer specifications. All products are designed and manufactured at its Cleveland, Ohio facility using CAD, SolidWorks, and 3-D prototyping technology.

Product overview

Custom Connector is an American-made electro-mechanical device manufacturer established in 1969, producing a comprehensive portfolio of relay sockets, connectors, and electronic packaging products. The company positions itself as the largest relay socket manufacturer in the United States with the broadest line of relay sockets in the world. The product portfolio centers on four core product lines: Industrial Relay Sockets (including OT, ST, MT, GT, ES, EC, SD, SS, RB, OB, CM, MR, and GR series), Automotive Relay Sockets (BR, PR, VR, and PW series for mini, micro, and maxi ISO relays), Electronic Packaging Products (GB/TB, FB/FC, HB, DC/HC/JC, E1, E2, and DM/PM series enclosures), and Custom Electro-Mechanical Connectors designed to specification. Supporting these core lines are DIN Rails and Accessories, Terminal Blocks (G Series), and Switch Connectors (CCH Series). The company also recently introduced new products including the TSC110 and MC00003 switch connectors, SIR-6 and KT708 relay sockets, and ES 12 and ES 50/3G relay sockets. All products are manufactured in Cleveland, Ohio with ISO 9001:2015 certification.

Differentiator

Problem solved

Functional benefit

Products and services

• Industrial Relay Sockets Break-resistant thermoplastic relay sockets available in DIN rail mounting, panel mounting, printed circuit board, quick disconnect wiring, and solder wiring configurations. Includes open frame and European-style finger-safe designs, with most models UL recognized, CSA certified, and CE marked. Spans multiple series including OT, ST, MT, GT, ES, EC, SD, SS, RB, OB, CM, MR, and GR.
• Automotive Relay Sockets Complete automotive relay connector line for mini, micro, and maxi ISO relays, molded from heat stabilized thermoplastic. Available with or without mounting brackets, interlockable for multiple relay applications; PC mount versions are board-ready for all ISO relay sizes. Spans BR, PR, VR, and PW series.
• Electronic Packaging Products Encapsulation shells for solid state requirements with or without potting compounds, custom molded covers, and plug-in enclosures with 8-pin octal or 11-pin round contact configurations. HB08 model rated for up to 600 volt applications with custom colors and hole patterns available. Spans GB/TB, FB/FC, HB, DC/HC/JC, E1, E2, and DM/PM series.
• Custom Electro-Mechanical Connectors Custom designed and manufactured electro-mechanical connecting devices engineered to customer specifications, ranging from light-duty circuit board applications to heavy-duty hard-wiring requirements.
• G Series Terminal Blocks Terminal blocks for electrical connection applications in industrial settings.
• DIN Rails and Accessories Aluminum and steel DIN rails in 35mm format (C-103, C-108, C-112 aluminum; C-104 to C-111 steel), support brackets, hold down springs, rail mounting clamps, and ejectors for mounting relay sockets and terminal blocks.
• CCH Switch Connectors CCH Series rocker switch connectors for switch connection applications in industrial equipment.
• New Product Switch and Relay Sockets Newer additions to Custom Connector's catalog covering pushbutton and toggle switch connectors (TSC110, MC00003), forcible guided PC board relay sockets (SIR-6), PC board relay sockets for crane lift control (KT708), and DIN rail mountable finger-safe relay sockets (ES 12 and ES 50/3G).

Segments3 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

One partnership is on record.

• Factory Authorized DistributorscoreChannel Partner/ Reseller/ DistributorAll products are available for sale through trusted network of factory authorized distributors. A complete list of the distributors in each market area may be obtained from the factory.

Scale indicators4 records

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• ABB: Global electrification and automation company offering relay sockets and DIN-rail mounted control accessories that overlap with Custom Connector's industrial relay socket portfolio, though as part of a much broader portfolio.
• Siemens: Large industrial automation and electrical equipment manufacturer whose Sirius and 3RT series relay sockets overlap with Custom Connector's industrial socket portfolio in OEM control panels and DIN-rail assemblies.
• Phoenix Contact: Major manufacturer of industrial connection technology including relay sockets, terminal blocks, and DIN-rail mounted electronics. Competes head-to-head with Custom Connector in industrial relay sockets while also serving a much broader interconnection portfolio.
• Schneider Electric (Square D / Telemecanique): Global industrial automation player whose relay, socket, and Zelio/TeSys product families compete with Custom Connector's industrial and automotive relay socket offerings within broader control and automation solutions.
• TE Connectivity: Global connector and sensor leader whose relay socket and industrial interconnection offerings overlap directly with Custom Connector's core product lines, but at much larger scale across automotive, industrial, and aerospace end markets.
• Omron: Industrial automation and electronic components manufacturer producing relay sockets, automotive relays, and DIN-rail accessories that overlap with Custom Connector's industrial and automotive socket lines.
• Eaton (Cutler-Hammer): Diversified industrial manufacturer selling relay sockets, DIN-rail hardware, and industrial control components under the Cutler-Hammer brand, directly overlapping Custom Connector's industrial relay socket and accessories lines.

Direct peers

• Finder: European specialist in relays and relay sockets with a catalog depth and product focus very similar to Custom Connector — both serve industrial control panels with broad DIN-rail and PCB-mount relay socket families.
• IDEC Corporation: Manufacturer of relays, sockets, and industrial control components with overlapping industrial relay socket SKUs and a comparable niche specialist positioning relative to Custom Connector.
• Wieland Electric: Specialist in industrial interconnection including relay sockets, terminal blocks (similar to Custom Connector's G Series), and DIN-rail accessories, serving overlapping customers in industrial control panel building.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/custom-connector-corp

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 Custom Connector