SERDI France

What SERDI France does

SERDI France (SERDI SARL) is a French specialty manufacturer of custom magnetic components, founded in 1965 and headquartered in Le Coudray-Montceaux, France. The company designs, reverse-engineers, and manufactures bespoke transformers, inductors, and coils produced entirely to each client's technical specification (cahier des charges). Its technical capability spans the full in-house production chain: coil winding (linear and toroidal, from 4mm toroids to 50KVA three-phase units over 300kg), moulding with polyurethane and epoxy resins, vacuum impregnation at 4 and 20 bar, and individual electrical and dimensional testing with serialized traceability. The asset base includes over 20 specialised winding machines and polymerisation ovens, with continuous reinvestment in modernisation.

The company operates exclusively in B2B enterprise sales across five principal verticals: aerospace (civil and military), railway, military/defence, nuclear energy, and industrial/energy management. Named clients include Dassault Aviation, Thales, Safran, SNCF, RATP, Framatome, CEA, Cobham, Nexeya, and SLB, with a 30-year supply relationship supplying 150+ coils for the Rafale fighter jet program. Services are organized around four pillars: Conception (custom design, ~50 new products per year), Rétro-engineering (remanufacturing obsolete transformers), Fabrication (moulding and vacuum impregnation), and Contrôle (unit-level testing and traceability). The company holds ISO 9001 certification from AFNOR (2022-2025) and operates a wholly-owned sister company, Technopoint', acquired in 2018, which holds EN 9100 and ISO 9001 certifications for aerospace supply.

Revenue is generated through project-based custom manufacturing contracts with multi-year cadences; no catalog, standard pricing, or e-commerce channel exists. The company is privately held under managing director Emmanuel Richard, who acquired SERDI in 2013, with the group comprising approximately 50+ collaborators across two French production sites. The customer base spans over 300 clients in France and internationally, marketed purely through direct engagement (phone, email, contact form) and supported by a corporate website and LinkedIn presence.

Name

SERDI France

Legal name

SERDI SARL

Website

https://serdi.fr

Company type

Private

Founded year

1965

Operating status

Operating

Headcount range

11–50 employees

Short description

SERDI France is a French custom manufacturer of bespoke magnetic components — transformers, inductors, and coils — serving over 300 enterprise clients across aerospace, railway, military, nuclear, and industrial sectors with fully in-house design, retro-engineering, winding, moulding, and testing.

Ownership category

akta.pro rank

Headquarters

HQ city

Le Coudray-Montceaux

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Transformer & Coil Manufacturing: Design, manufacture, and supply of bespoke magnetic components (transformers, inductors, coils) produced entirely to each client's specification (cahier des charges). Revenue is generated through project-based custom manufacturing with no standard catalog products.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels3 records

Core offering

SERDI France designs, retro-engineers, and manufactures custom magnetic components (transformers, inductors, coils) entirely to client specifications for high-criticality sectors including aerospace, railway, military, and nuclear energy. All operations are performed in-house at their French facility from raw material procurement through winding, cabling, moulding, vacuum impregnation, and unit electrical testing, with no standard catalogue products — every order is a bespoke project.

Product overview

SERDI France is a specialized manufacturer of custom electrical windings and transformers with nearly 60 years of experience. The company operates as a single unified offering centered on bespoke manufacturing services rather than a product platform. Its core product portfolio includes over 12 distinct transformer and inductor types (toroidal, three-phase, high-voltage, planar, flyback, and air-core inductors) ranging from 4mm toroidal transformers to 50KVA three-phase units weighing over 300kg. These are complemented by four key service offerings: Conception (custom design of new windings), Rétro-engineering (reverse engineering of obsolete parts), Fabrication (manufacturing with molding and vacuum impregnation), and Contrôle (unit quality testing with traceability). The company also operates Technopoint', a sister company focused on high-tech windings for medium production runs serving industrial, railway, military, and space sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Transformateur Torique Toroidal transformer with donut-shaped core for efficient magnetic coupling and low electromagnetic interference, custom-manufactured from 4mm diameter upwards.
• Transformateur Triphasé Three-phase transformer for industrial power distribution, capable of handling up to 50KVA and weighing over 300kg.
• Transformateur Haute Tension 15kV High-voltage transformer rated at 15kV for industrial and specialised electrical applications.
• Transformateur Haute Tension Multi Enroulements Multi-winding high-voltage transformer for complex electrical circuits requiring multiple voltage outputs.
• Transformateur Haute Tension 4 Gorges High-voltage transformer with 4 cores for applications requiring elevated voltage output.
• Transformateur Planar Planar transformer with flat coil structure for compact, low-profile power conversion applications.
• Transformateur Circuit C C-core transformer designed for efficient magnetic flux conduction in power applications.
• Transformateur CMS FlyBack 50W A compact surface-mount flyback transformer designed for power conversion applications, rated at 50W.
• Transformateur CMS FlyBack 200W A high-power surface-mount flyback transformer for power conversion, rated at 200W.
• Inductance Forte Puissance High-power inductor designed for demanding electrical applications requiring robust energy storage and filtering.
• Self à Air Air-core inductor for applications requiring low core losses and high Q factor.
• Self à Air en Méplat Moulée Molded flat air-core inductor designed for specific spatial constraints in electrical assemblies.
• Conception de bobinages Custom design and engineering of new windings and transformers based on client specifications, with the engineering team producing approximately 50 new products designed annually.
• Rétro-engineering de transformateurs Reverse engineering and remanufacturing of obsolete transformers using original plans or physical samples, restoring defective or out-of-service equipment no longer produced by original manufacturers.
• Fabrication de transformateurs Manufacturing of custom transformers with moulding and vacuum impregnation capabilities, producing 100% French-made products using polyurethane and epoxy resins for vibration, humidity, and mechanical protection.
• Contrôle unitaire de pièces électriques Individual unit testing and quality control including electrical tests and dimensional inspections, with detailed control reports and piece serialisation for full lifecycle traceability.

Quantifiable outcome

• 100% French manufacturing (Made in France) — all operations from raw material sourcing to packaging and shipping performed in-house
• +2 more outcomes

Named customers11 records

Segments5 records

Ideal customer profiles4 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.

• Technopoint'coreStrategic or Co-development Partner · 1 January 2018In 2018, SERDI acquired Technopoint', a sister company with over 30 years of experience in custom coil winding. Technopoint' specialises in high-technology winding for medium series, serving industrial, railway, military, and space sectors nationally and internationally. This acquisition expanded SERDI Group's capabilities, competencies, and production capacity, ensuring business continuity and production sustainability.

Scale indicators6 records

Recent moves7 records

Expansion highlights5 records

Emerging players

• Lenco Electronics: Lenco Electronics is a US-based custom magnetics manufacturer specialising in transformers and inductors for military, aerospace, and industrial customers. Comparable to SERDI through defence and aerospace customer penetration and bespoke manufacturing, with partial overlap on the niche custom magnetics segment.
• Tabtronics: Tabtronics is a US custom magnetics manufacturer focused on aerospace, defence, and medical applications with high-reliability discrete magnetics. Comparable to SERDI through defence/aerospace customer exposure and custom magnetics, though smaller and more US-centric in focus.

Direct peers

• ETAL Group: ETAL is a Sweden/UK-based custom magnetics specialist producing bespoke transformers and inductors for railway, industrial, and energy customers. Closely comparable to SERDI on European railway customer base, custom magnetics focus, and long-lifecycle industrial programmes.
• Block Transformatoren: Block is a German manufacturer of control, safety, and specialty transformers serving industrial automation, railway, and renewable energy markets. Comparable to SERDI in specialty transformer focus, German/French industrial customer overlap, and project-based custom manufacturing.
• Noratel: Noratel is a European-headquartered (Norway/Sweden) custom magnetics manufacturer producing bespoke transformers, inductors, and chokes for industrial, railway, and renewable energy customers. Highly comparable to SERDI in bespoke transformer design, mid-volume European manufacturing footprint, and multi-vertical end markets.
• Prem Magnetics: Prem Magnetics is a US custom transformer and inductor manufacturer serving audio, industrial, medical, and aerospace customers. Comparable to SERDI in product range (toroidal, laminated, planar), custom design capability, and project-based B2B sales motion.
• Triad Magnetics: Triad Magnetics is a US-based custom magnetics manufacturer producing transformers, inductors, and chokes for audio, industrial, and military customers. Comparable to SERDI through custom-engineered magnetics, military/industrial customer mix, and long-tail bespoke manufacturing model.

Broad incumbents

• ABB: ABB is a global electrical equipment incumbent with a substantial transformers and power magnetics portfolio serving utilities, industry, and transport. Comparable to SERDI only at the broad category level - ABB offers standard catalog transformers at scale while SERDI specialises in bespoke low-volume units, but the two share railway and industrial customers in Europe.
• Siemens Energy: Siemens Energy is a global incumbent in power and transformer equipment serving utilities, industry, and rail. Broad incumbent comparable to SERDI on transformer technology and European industrial customer base, though at vastly greater scale and focused on larger power transformers rather than bespoke low-volume units.
• Hammond Manufacturing: Hammond Manufacturing is a North American manufacturer of transformers, enclosures, and magnetics for industrial, electronic, and audio applications. Broad incumbent comparable to SERDI through transformer manufacturing and industrial customer base, though Hammond's catalog-driven model differs from SERDI's fully bespoke approach.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/serdi-france

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 SERDI France