Sag Harbor Industries

What Sag Harbor Industries does

Sag Harbor Industries, Inc. is a privately held custom electromagnetic component manufacturer founded in 1946 by Charles Edison in Sag Harbor, New York. The company designs and manufactures precision-wound electric coils (electric, encapsulated, field, molded, self-supported, solenoid, and varnished), custom transformers and toroidal components up to 5 KVA, cable assemblies and wire harnesses, and printed circuit board and box-build assemblies. Manufacturing relies on automated and semi-automated winding equipment, in-house tooling and plastic injection molding (thermoplastics and thermosets), custom epoxy encapsulation development for harsh-environment applications (chemical immersion, jet engine, underwater, radiation, downhole), and UL-certified Class B/F/H insulation systems. Operations are 100% Made-in-USA across two facilities in Sag Harbor, NY and Farmville, NC, both ISO 9001:2015 certified, with additional ISO 13485 (medical) and AS9100 (aerospace) qualifications and UL file E63660.

The company sells directly to OEM customers through an engineering-driven, quote-based go-to-market model targeting aerospace, medical devices, electronics, renewable energy, industrial automation, military/government, and automotive segments. Pricing is custom per specification, with JIT/KanBan stocking programs and multi-year contract cadences. A wholly-owned subsidiary, Dortronics Systems Inc., manufactures electromagnetic door locking hardware and controls for the security industry and launches five to six new products annually. All sales are direct OEM engagement; no reseller or distribution channel exists. Revenue is project-based (one-time license equivalent per build), and no pricing is publicly disclosed beyond a single magnet wire reference price. The company has remained privately owned since founding with no disclosed external investors, parent company, or funding rounds.

Name

Sag Harbor Industries

Legal name

Sag Harbor Industries, Inc.

Website

https://sagharborind.com

Company type

Private

Founded year

1946

Operating status

Operating

Headcount range

51–100 employees

Short description

Sag Harbor Industries is a privately held US custom coil winding and electromagnetic component manufacturer serving OEM customers in aerospace, medical, electronics, industrial automation, and defense from facilities in Sag Harbor, NY and Farmville, NC, with a wholly-owned door-lock hardware subsidiary.

Ownership category

akta.pro rank

Headquarters

HQ city

Sag Harbor

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Coil Manufacturing: Sag Harbor Industries generates revenue through the custom design and manufacture of electric coils, encapsulated coils, field coils, molded coils, self-supported coils, solenoid coils, and varnished coils. Orders are project-based, typically sourced through engineering consultation and direct OEM engagement, with pricing quoted per specification.
2. Custom Transformers and Toroids: Design and manufacture of custom transformers including toroidal transformers, power transformers, and chokes for specialized OEM applications. Revenue is generated per custom build order.
3. Cable Assemblies and Wire Harnesses: Custom cable assemblies and wire harnesses produced for automation, transportation, electronics, marine, security, and electromechanical applications. Manufactured using automated wire processing and precision crimping equipment.
4. PCB and Box Build Assembly: Printed circuit board manufacturing and box build assembly services including SMT, through-hole insertion, conformal coating, and functional testing. Supports both prototype and volume production runs.
5. Door Lock Systems (Subsidiary): Dortronics Systems Inc., a wholly-owned subsidiary, manufactures electric locking hardware and controls for the security and door control industries, introducing five to six new products annually.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels6 records

Core offering

Sag Harbor Industries is a custom coil winding manufacturer that designs and produces electric coils, encapsulated coils, field coils, molded coils, self-supported coils, solenoid coils, varnished coils, transformers, toroidal transformers and chokes, cable assemblies and wire harnesses, and PCB box build assemblies. All products are custom-built to OEM specifications and manufactured domestically at ISO 9001:2015-certified facilities in Sag Harbor, NY and Farmville, NC. A wholly-owned subsidiary, Dortronics Systems Inc., produces electromagnetic door locks and security hardware.

Product overview

Sag Harbor Industries is a custom coil winding manufacturer offering a comprehensive portfolio of electrical and magnetic components for OEM customers. The core offering centers on precision custom wound coils including Electric Coils, Encapsulated Coils, Field Coils, Molded Coils, Self-Supported Coils, Solenoid Coils, and Varnished Coils, complemented by Transformers, Toroidal Components (transformers, coils, and chokes), Cable Assemblies and Wire Harnesses, and PCB & Box Build Assemblies. The company operates as a single unified manufacturing platform with ISO 9001:2015 certification, providing these products primarily to the aerospace, automotive, medical, industrial automation, and electronics industries. A wholly owned subsidiary, Dortronics Systems Inc., manufactures electromagnetic door locks and security hardware. All products are 100% made in the USA at facilities in Sag Harbor, NY and Farmville, NC.

Differentiator

Problem solved

Functional benefit

Products and services

• Electric Coils
• Encapsulated (Poured Epoxy) Coils

Named customers8 records

Segments7 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

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Triad Magnetics: U.S.-based custom manufacturer of transformers, inductors, and power magnetics serving industrial, medical, and audio applications. Closest direct competitor to Sag Harbor in custom-wound magnetics for OEM customers.
• Renco Electronics: Custom manufacturer of transformers, inductors, coils, and toroids with U.S. production. Competes head-to-head with Sag Harbor in custom magnetics for aerospace, defense, and industrial customers.
• Magnetic Component Engineering: Specialty custom coil and transformer manufacturer focused on high-reliability and harsh-environment applications including aerospace, medical, and downhole. Mirrors Sag Harbor's encapsulation and harsh-environment encapsulation expertise.
• Premier Magnetics: U.S. custom magnetics manufacturer of transformers, inductors, and coils for industrial, medical, and military applications. Comparable product breadth and similar OEM-direct sales model to Sag Harbor.
• Stonite Coil: Custom coil winding manufacturer specializing in solenoid coils, molded coils, and encapsulated coils. Directly comparable to Sag Harbor's encapsulation and solenoid product lines.
• ICE Components: Manufacturer of custom coils, transformers, chokes, and toroidal magnetics for power, industrial, and aerospace markets. Overlaps with Sag Harbor's toroid and choke product lines.
• West Coast Magnetics: Custom magnetics manufacturer producing transformers, inductors, and coils for aerospace, defense, and medical customers. Comparable niche focus on regulated, high-reliability OEM programs.

Broad incumbents

• Bel Fuse (Magnetics Division): Public diversified magnetics and power conversion company encompassing Signal Transformer, Amgis, and formerly C&D Power. Competes in the same transformer and inductor space but at much larger scale and broader portfolio.
• Hammond Manufacturing: Established manufacturer of transformers, enclosures, and power conditioning equipment serving industrial and electronics OEMs. Broader product portfolio than Sag Harbor but overlaps in custom magnetics.
• Tamura Corporation of America: Japanese-owned manufacturer of transformers, inductors, and power magnetics with U.S. operations. Competes with Sag Harbor in custom magnetics but with broader international footprint and product range.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/SagHarborInd
• Facebookfacebook.com/59874069
• LinkedInlinkedin.com/company/sag-harbor-industries

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 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 Sag Harbor Industries