TCI
TCI (now Allient Milwaukee) designs and manufactures power quality hardware — active and passive harmonic filters, line reactors, sine wave filters, and motor protection filters — serving industrial OEMs and infrastructure end-users in Oil & Gas, HVAC, water/wastewater, and general industrial sectors.
- Company typePrivate
- Founded1961
- HeadquartersGermantown, United States
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What TCI does
TCI (now operating as Allient Milwaukee) is a US-based designer and manufacturer of power quality and harmonic mitigation hardware, founded in 1961 as Trans-coil, Inc. in Milwaukee, Wisconsin and headquartered at W132 N10611 Grant Drive, Germantown, WI. The company produces active harmonic filters (HGA line using DSP controllers and PWM IGBT-based power conversion), a portfolio of passive harmonic filters (HGP, HGL, HSD, HSL, HSE — each addressing different load profiles and capacitance requirements), line reactors (KDR, KLR), sine wave filters (KMG, MSD) supporting motor lead lengths up to 15,000 feet, dV/dt motor protection filters (V1K), industrial control transformers (CPT), power factor correction capacitor banks (PFG), and EMI filters (KRF). Its proprietary PQconnect platform layers Bluetooth, Modbus RTU, and ODVA-certified EtherNet/IP remote monitoring onto passive filters, paired with the PQvision desktop/mobile application for real-time THID/THVD monitoring — functionality the company positions as first-of-its-kind for passive filter hardware.
The company generates revenue through hardware sales to electrical and machinery OEMs (globally), a distributor and manufacturer's representative network spanning North and South America, and direct sales via a quote-based pricing model with net 30 terms for qualified domestic customers. The customer base spans seven industrial verticals: Oil & Gas, HVACR, Water/Wastewater, General Industrial, Irrigation/Agriculture, Food & Beverage, and Elevator/Escalator, with documented end-users including Bakken Field operators, Wisconsin and Virginia municipal pump stations, and the Reading Phillies Stadium HVAC retrofit. Channel partnerships include a formal Rockwell Automation Technology Partner relationship and Canadian distribution through TransFab TMS.
TCI was acquired by Allied Motion Technologies in December 2018; Allied Motion rebranded to Allient (NASDAQ: ALBT) in 2023, and TCI was rebranded to Allient Milwaukee in 2025 while continuing to manufacture the TCI-branded product line. The facility is ISO 9001:2015 certified and BABAA-compliant, supports domestic manufacturing with short lead times, and serves as the company's sole manufacturing and shipping point. The company employs approximately 200 people and holds ISO 9001:2015, RoHS, REACH, ODVA, cULus, CE, ENEC, and CSA certifications across its product portfolio.
TCI firmographics
Firmographics- Name
- TCI
- Legal name
- TCI, LLC
- Website
- https://transcoil.com
- Company type
- Private
- Founded year
- 1961
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- TCI (now Allient Milwaukee) designs and manufactures power quality hardware — active and passive harmonic filters, line reactors, sine wave filters, and motor protection filters — serving industrial OEMs and infrastructure end-users in Oil & Gas, HVAC, water/wastewater, and general industrial sectors.
- Ownership category
- akta.pro rank
TCI industry classification
Industry- Product category
- Industrial Power Quality Equipment
- NAICS
- Electrical Equipment Manufacturing (33531), Electrical Equipment Manufacturing (3353), Relay and Industrial Control Manufacturing (335314)
- SIC
- Electrical Industrial Apparatus (3620), Electronic Coils, Transformers & Other Inductors (3677), Power, Distribution & Specialty Transformers (3612)
- akta.pro primary industry
- Reactive Power & Power Quality Equipment (Capacitor Banks, Reactors, STATCOM/SVC, Harmonic Filters) (IMAGAAAG)
- akta.pro secondary industries
- EMI/EMC & Filtering Components (Common-mode chokes, filters, shielding materials) (IMAGAJAN), Industrial Control Cabinets & Power Distribution (Panels, Switchgear for Automation) (IMAHAHAK), Instrument Transformers (CTs/VTs) & Sensors (Conventional/Optical) (EUADACAG)
Keywords
Where TCI is headquartered
LocationHeadquarters
- HQ city
- Germantown
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
TCI business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Power Quality Hardware Products: TCI generates revenue through the sale of active harmonic filters, passive harmonic filters, line reactors, sine wave filters, dV/dt filters, EMI filters, power factor correction capacitor banks, and industrial control transformers. Products are sold through distributors, manufacturer's representatives, and direct OEM partnerships. The company manufactures in the USA with short lead times.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Pay-as-you-go | Custom quotation-based pricing |
Go-to-market motion1 record
Distribution channels4 records
Marketing channels5 records
TCI product offering
Product offeringCore offering
TCI designs and manufactures power quality and harmonic mitigation components for industrial applications. Its product portfolio includes active and passive harmonic filters, line reactors, sine wave filters, dV/dt filters, industrial control transformers, capacitor banks, and EMI filters, sold primarily to industrial OEMs and end-users across multiple verticals.
Product overview
TCI (now Allient Milwaukee) offers a comprehensive portfolio of power quality solutions centered on active and passive harmonic filters, line reactors, motor protection devices, and power factor correction products. The core product line includes the HGA active harmonic filter for system-level harmonic mitigation; the HGP, HGL, HSD, HSL, and HSE passive harmonic filter families with PQconnect remote monitoring capability; the HG7 legacy 7% passive filter; KDR and KLR line reactors; KMG and MSD sine wave filters for motor protection; V1K dV/dt filters; CPT industrial control transformers; PFG capacitor banks; and KRF EMI filters. Supporting the hardware portfolio are the PQconnect connectivity platform for remote monitoring via Modbus RTU/EtherNet/IP and the PQvision software for real-time power quality data visualization. The company also offers 50Hz global solutions for international markets. Products are designed for industrial applications including Oil & Gas, HVAC, Water/Wastewater, Industrial, Irrigation/Agriculture, Food & Beverage, and Elevator/Escalator sectors, with engineering services for custom solutions and harmonic studies.
Differentiator
Problem solved
Functional benefit
Brands
- HarmonicGuard: Product line for active and passive harmonic filters including HGA, HGP, HGL models with PQconnect technology
- HarmonicShield
- MotorGuard
- MotorShield
- PQconnect
- PQvision
Products and services
- Active Harmonic Filters Active electronic filters that detect and inject compensating currents to reduce harmonic distortion in industrial electrical systems, used by OEMs and industrial facilities.
- Passive Harmonic Filters Passive L-C tuned filter units that absorb specific harmonic frequencies to mitigate distortion on industrial power systems.
- Line Reactors Three-phase and single-phase line reactors used to protect variable frequency drives and other equipment from line disturbances and harmonics.
- Sine Wave Filters Output filters installed between a VFD and motor to convert the PWM waveform into a smooth sine wave, reducing motor insulation stress and audible noise.
- dV/dt Filters Filters that limit the rate of voltage rise and peak voltage at motor terminals, protecting motor windings from insulation breakdown caused by fast-switching VFD outputs.
- Industrial Control Transformers Step-down transformers designed for industrial control circuits to supply lower voltages required by control devices and panels.
- Capacitor Banks Power factor correction capacitor banks used in industrial facilities to improve power factor and reduce utility penalties.
- EMI Filters Electromagnetic interference filters that suppress conducted EMI to help industrial equipment meet EMC regulatory requirements.
Quantifiable outcome
- Limits current distortion to less than 5% TDD
- +4 more outcomes
Companies that use TCI
Customer profileNamed customers4 records
Segments7 records
Ideal customer profiles2 records
TCI technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration6 records
Feature5 records
TCI partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core and flagship.
- ODVAcoreODVA certified TCI's PQconnect passive harmonic filter technology, enabling seamless EtherNet/IP integration. PQconnect allows ultimate compatibility with EtherNet/IP dependent PLC or HMI devices with implicit messaging for real-time filter status and power quality data.
- Rockwell AutomationcoreRockwell Automation Technology Partner with co-marketing arrangements. TCI's products are marketed through Rockwell's partner ecosystem and display the RA Partner logo.
- Allied Motion Technologies (Allient)flagshipAcquired by Allied Motion Technologies in December 2018. Allied Motion rebranded to Allient (Allient Nexus Technologies) in 2023. TCI renamed to Allient Milwaukee in 2025 while continuing to manufacture the same TCI products.
Scale indicators4 records
Recent moves6 records
Expansion highlights5 records
TCI competitors and assessment
Company assessmentBroad incumbents
- ABB: ABB is a global industrial conglomerate offering power quality solutions, harmonic filters, drives, and switchgear as part of its broad electrification portfolio. Competes with TCI in active and passive harmonic filtering while bundling solutions across drives, motors, and power infrastructure.
- Siemens: Siemens offers active and passive harmonic filters, line reactors, and power quality products through its Smart Infrastructure and Digital Industries divisions. A broad incumbent with extensive global reach competing with TCI in industrial power quality.
- Eaton: Eaton provides harmonic filtering, power factor correction, and power quality solutions within its Electrical Americas segment. A broad incumbent with overlapping product categories serving similar industrial and utility customers as TCI.
- Schneider Electric: Schneider Electric offers power factor correction, harmonic filtering, and power quality solutions as part of its comprehensive energy management and industrial automation portfolio. Competes broadly with TCI across multiple verticals and geographies.
- Delta Electronics: Delta Electronics manufactures power supplies, EMI filters, and active harmonic filters for industrial applications. A broad incumbent with significant Asia-Pacific presence that competes with TCI in active power quality solutions.
Direct peers
- MTE Corporation: MTE Corporation is a direct competitor specializing in passive and active harmonic filters, line reactors, and power quality solutions for industrial VFD applications. Comparable in scale and product focus to TCI, serving the same verticals (HVAC, water/wastewater, oil & gas).
- Schaffner Group: Schaffner manufactures EMI/RFI filters, power quality solutions, and harmonic filters for industrial and railway applications. Directly comparable to TCI's KRF EMI filter and broader power quality portfolio, with similar product overlap in motor protection and harmonic mitigation.
Others
- Rockwell Automation: Rockwell Automation is both a TCI partner and an adjacent player in industrial automation. While not a direct competitor in standalone filters, Rockwell's drives and PACs increasingly incorporate harmonic mitigation, and its PartnerNetwork ecosystem amplifies TCI's reach.
Emerging players
- Enerdoor: Enerdoor specializes in EMI/RFI filters, harmonic filters, and power quality solutions for industrial automation. A smaller specialist competitor comparable to TCI in product focus and target customer base, particularly in European markets.
Regional players
- Invertek Drives: Invertek Drives manufactures variable frequency drives with built-in harmonic mitigation features, primarily serving EMEA markets. A regional player whose integrated approach to harmonic control represents an emerging competitive vector for TCI's standalone filter business.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
TCI social profiles
Digital presenceTCI compliance and trust
Trust signalCompliance10 records
TCI financial estimates
Financial estimateRevenue estimate
Valuation estimate
TCI leadership team
Management profileNumber of profiles
Profiles1 record
TCI funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
TCI M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about TCI
What does TCI do?
TCI designs and manufactures power quality and harmonic mitigation components for industrial applications. Its product portfolio includes active and passive harmonic filters, line reactors, sine wave filters, dV/dt filters, industrial control transformers, capacitor banks, and EMI filters, sold primarily to industrial OEMs and end-users across multiple verticals.
Is TCI a public or private company?
TCI is a private company. It is classified as corporate owned and is currently operating.
When was TCI founded?
TCI was founded in 1961. It employs 51 to 100 people.
Where is TCI based?
TCI is headquartered in Germantown, United States, in the North America region.
How does TCI make money?
One revenue line is on record: power Quality Hardware Products.
Who are TCI's main competitors?
Broad incumbents on record are ABB, Siemens, Eaton, Schneider Electric and Delta Electronics. Direct peers are MTE Corporation and Schaffner Group. Rockwell Automation is listed as an others. Enerdoor is listed as an emerging player. Invertek Drives is listed as a regional player.
Does TCI have an API?
No public API is recorded for TCI.
What industry is TCI in?
TCI's product category is Industrial Power Quality Equipment. Its primary akta.pro industry code is IMAGAAAG, Reactive Power & Power Quality Equipment (Capacitor Banks, Reactors, STATCOM/SVC, Harmonic Filters), with a secondary code of IMAGAJAN, EMI/EMC & Filtering Components (Common-mode chokes, filters, shielding materials). Its NAICS code is 33531 and its SIC code is 3620.