Power Magnetics

What Power Magnetics does

Power Magnetics Inc., founded in 1968 in Trenton, New Jersey, is a privately held, family-owned manufacturer of custom transformers, AC reactors, and DC inductors serving industrial customers globally. The company is led by the Bannwart family, with Ilene Pearl Bannwart as CEO and Chairperson, Carl Bannwart as President, and an engineering department holding over 120 years of combined design experience. Its portfolio spans over 60 distinct product types organized across single-phase and three-phase transformers (plate, distribution, zig-zag, isolation, Scott-T, auto, furnace, modulation, neutral grounding, rectifier, and high-voltage plate), reactors and inductors (single-phase harmonic trap, line, saturable, iron core current limiting, three-phase grounded core trap, floating core, DC chokes), and NEMA 1 and 3R enclosures, with capabilities ranging from 1 kVA to 4,500 kVA, 4kV to 38kV class, and BIL ratings to 150 kV (independently tested to 170 kV).

The company's technical foundation rests on proprietary design methods the company describes as its "Brooklyn Bridge Engineering" philosophy, supported by advanced simulation capabilities including 3D Autodesk Inventor CAD and Finite Element Analysis for electromagnetic and mechanical stress modeling, and a Vacuum-Pressure Impregnation (VPI) manufacturing process. Its Medium Voltage Trap Reactors are positioned as the de facto industry standard in power quality for metal enclosed capacitor banks and harmonic filter banks, and products are independently tested to 95, 125, and 150 kV BIL. The company holds ISO 9001:2015 certification from SGS and designs to UL, CE, IEC, CSA, ANSI, and IEEE 32 standards.

Power Magnetics operates a sales-led, enterprise-direct go-to-market model with no public list pricing; every order flows through a quote-based RFQ process with engineering co-design. Revenue streams are one-time custom hardware sales across product categories plus supporting engineering services. Customers are distributed across energy, oil and gas, manufacturing, communications, drive systems, facilities, and government verticals, with explicit references to deployments in every US government location globally and supply contracts with large American machine tool and heat-treating firms. In 2024 the company announced plans for a building addition and to double its business capacity and employment over the next few years.

Name

Power Magnetics

Legal name

Power Magnetics Inc.

Website

https://powermagneticsinc.com

Company type

Private

Founded year

1968

Operating status

Operating

Headcount range

11–50 employees

Short description

Power Magnetics Inc. is a privately held, family-owned custom manufacturer founded in 1968 in Trenton, New Jersey, designing and producing transformers, AC reactors, DC inductors, and enclosures for global industrial, energy, oil and gas, manufacturing, communications, and government customers.

Ownership category

akta.pro rank

Product category

Industrial Power Magnetics

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Electrical Equipment Manufacturing (33531)

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

Transformers & Magnetics (Power/Signal) (HDAHANAD), Inductors & Coils (Power/RF/Chokes) (HDAHANAC), Instrument Transformers (CTs/VTs) & Sensors (Conventional/Optical) (EUADACAG)

Keywords

• Custom transformer manufacturing
• AC reactor design
• DC inductor fabrication
• Power quality equipment
• Industrial magnetics

Headquarters

HQ city

Trenton

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Revenue model

1. Custom Transformer Sales: Custom-built electrical transformers sold as one-time hardware products. Includes single phase and three phase transformers, plate transformers, distribution transformers, isolation transformers, Scott-T transformers, auto transformers. Range from 1 kVA to 4,500 kVA, 4kV to 38kV Class.
2. Custom Reactor and Inductor Sales: Custom reactors and inductors including harmonic filter reactors, line reactors, saturable reactors, current limiting reactors (CLR), DC chokes. Sold as made-to-order industrial components with specifications matching customer requirements.
3. Engineering Services: Engineering support services including customer support to precise product specifications, product definition and design, CAD designs, tailor-made interface and connecting boxes, and project management.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

Power Magnetics designs and manufactures custom electrical transformers, AC reactors, and DC inductors for industrial power applications. The company builds made-to-order magnetics ranging from 1 kVA to 4,500 kVA, 4kV to 38kV Class, with BIL ratings to 150 kV, serving energy, oil and gas, manufacturing, communications, and government customers globally.

Product overview

Power Magnetics is a manufacturer of custom transformers, AC reactors, and DC inductors established in 1968. The company offers a comprehensive portfolio of over 60 distinct product types organized into three main categories: Single Phase and Three Phase Transformers (including plate, distribution, zig-zag, isolation, Scott-T, auto, furnace, modulation, neutral grounding, rectifier, and high voltage transformers), Types of Reactors and Inductors (including single phase harmonic/trap reactors, line reactors, saturable reactors, iron core current limiting reactors, and three phase grounded core trap reactors), and NEMA-rated Enclosures (NEMA 1 and 3R). Products span power ranges from 1 kVA to 4,500 kVA, voltage classes from 4kV to 38kV, with BIL ratings to 150kV. The company also provides engineering services including CAD design, finite element analysis, and electromagnetic simulation. Their products serve diverse industries including energy, oil and gas, transportation, automotive, manufacturing, communications, and commercial facilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Three Phase Transformer
• High Voltage Plate Transformer
• Modulation Control Transformer
• Furnace Transformer
• Neutral Grounding Transformer
• Single Phase Harmonic Reactor
• Line Reactor
• Saturable Reactor
• Iron Core Current Limiting Reactor (CLR)
• Three Phase Grounded Core Trap Reactor
• Medium Voltage Trap Reactor (MVTR)
• NEMA Enclosures
• Custom Magnetics Engineering Services

Quantifiable outcome

• Impulse tested to 170kV BIL on single phase floating core reactors
• +3 more outcomes

Named customers6 records

Segments6 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators5 records

Recent moves5 records

Expansion highlights3 records

Direct peers

• Hammond Power Solutions: Canada-based custom and standard magnetics manufacturer (dry-type transformers, reactors, and inductors) for industrial and power-quality markets. Directly comparable product portfolio, similar custom-build sales motion, and overlapping customer verticals (industrial, energy, drives).
• Marcus Transformer: Custom transformer and reactor manufacturer serving industrial, utility, and OEM customers with made-to-order designs. Comparable specialty magnetics niche with similar quote-based enterprise sales motion.
• Mirus International: Specialty manufacturer of harmonic filters, line reactors, and transformers targeting six-pulse drives and other industrial power-quality applications. Closest functional overlap with Power Magnetics' MVTR and harmonic reactor product lines.
• ERMCO (Electric Research & Manufacturing Cooperative): US manufacturer of transformers, including distribution, pad-mount, and specialty units, with a strong custom-build heritage and industrial customer base. Compares directly to Power Magnetics' distribution and specialty transformer business.
• Jefferson Electric (a Hubbell brand): Long-established US manufacturer of dry-type transformers and magnetics, including distribution, encapsulated, and custom designs. Closely comparable legacy industrial magnetics manufacturer with overlapping channels.
• TCI (Trans-Coil International): US manufacturer specializing in line reactors, harmonic filter reactors, and DC chokes — almost identical core product line to Power Magnetics' reactor and inductor catalog, serving the same drive system and power-quality end-markets.

Broad incumbents

• Eaton: Global electrical equipment major with extensive transformer, reactor, and power-quality portfolios serving industrial, utility, and data center markets. Competes with Power Magnetics on larger-spec projects while offering a much broader catalogue.
• Siemens Energy: Major electrical equipment and grid technology provider with transformers and power-quality products across utility and industrial segments. Encroaches on Power Magnetics' higher-voltage and specialty custom space via scale and engineering depth.
• Schneider Electric: Global energy management and automation leader with a broad transformer and power-quality portfolio overlapping Power Magnetics' industrial and infrastructure customers, particularly via the Square D brand.
• ABB: Multinational power and automation major with a substantial transformer and grid-power-quality business. Competes via scale, global footprint, and R&D depth; sets the benchmark for utility-grade magnetics.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/powermagneticsinc

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 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 Power Magnetics