What Alpha Therm does

Alpha Therm GmbH supplies temperature protection, overload protection and surge protection components for electronic circuits. The company offers thermal fuses, thermostats, PTC and NTC thermistors, bimetal temperature controllers and temperature sensors. Its portfolio also includes TVS diodes, varistors, gas discharge tubes, fuse resistors, resettable fuses, switches, capacitors, mechanical parts and cable assemblies. Alpha Therm GmbH serves sectors such as automotive, telecommunications, power electronics and general industrial equipment, supporting OEMs with component selection and logistics.

Name

Alpha Therm

Legal name

Alpha Therm GmbH

Website

https://alpha-therm.de

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

1–10 employees

Short description

Alpha Therm GmbH supplies temperature-dependent electronic components and circuit protection devices for industrial applications.

Ownership category

akta.pro rank

Product category

Electronic Components - Temperature Sensors & Circuit Protection

NAICS

Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Electronic Components, Nec (3679)

akta.pro primary industry

Thermistors & Temperature Sensors (NTC/PTC/RTD Elements) (HDAHANAH)

akta.pro secondary industry

Automotive Thermal Management for Electrified Powertrains (Battery/Inverter/Motor Cooling) (IMACALAD)

Keywords

• Platinum temperature sensors
• Circuit protection components
• Thermal fuses
• Surge protection devices
• Electronic protection components

Headquarters

HQ city

Plankstadt

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Electronic Components Sales: B2B sale of temperature-dependent electronic components and circuit protection solutions. Products include temperature sensors, thermal fuses, thermostats, surge protection devices, and switches. Primarily one-time hardware sales with no recurring revenue model indicated.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Alpha Therm GmbH manufactures and supplies temperature-dependent electronic components and circuit protection devices, specializing in platinum thin-film temperature sensors (Pt RTDs) manufactured to DIN EN 60751 standards. The portfolio spans thermal fuses, thermal switches, bimetal thermostats, PTC/NTC thermistors, overvoltage protection devices (TVS diodes, varistors, gas arresters), overload protection components, active circuit protection devices, switches, and custom cable assembly, all produced as MADE IN GERMANY for industrial B2B customers.

Product overview

Alpha Therm GmbH is a German specialist for temperature-dependent electronic components and circuit protection. The company offers a comprehensive portfolio of products organized into six main categories: (1) Temperature Protection including thermal fuses (radial, axial, DC, organic), thermal switches, bimetal thermostats, and PTC thermistors; (2) Temperature Control featuring bimetal temperature regulators, adjustable bimetal regulators, and electronic temperature controllers; (3) Temperature Sensing with platinum thin-film RTD sensors (Pt100/Pt1000) in various form factors (wire-ended, SMD, coiled, pre-assembled), KTY sensor alternatives, NTC thermistors, and temperature probes; (4) Overvoltage Protection comprising TVS diodes, thyristor arresters, standard and high-surge metal oxide varistors, thermally protected varistors, gas discharge tubes, protection modules, and protection devices for low-voltage systems, PV systems, signal networks, and street lighting; (5) Overload Protection including PTC thermistors, NTC inrush current limiters, fusible resistors, thermally protected fusible resistors, melting fuses, and resettable PPTC fuses; (6) Active Circuit Protection with Heat CutOff (HCO) and Idea Thermal CutOff (iTCO) devices. Additionally, the company offers switches and buttons (rocker, toggle, slide, pushbutton, anti-vandalism, rotary, tactile, multifunction, emergency, DIP), capacitors, mechanical components, and custom cable assembly services. The company has over 30 years of experience manufacturing platinum temperature sensors in thin-film technology, producing according to DIN EN 60751 standards with MADE IN GERMANY quality, and serves international markets including automotive, telecommunications, and electronics industries.

Differentiator

Problem solved

Functional benefit

Products and services

• Platinum Thin-Film Temperature Sensors (Pt RTDs) Platinum resistance temperature detectors manufactured in thin-film technology (Dünnschichttechnik) per DIN EN 60751, covering standard range -50°C to +600°C with extended models from -200°C to +850°C. Available in all tolerance classes up to 1/10 DIN, standard TCR 3850 ppm/K (also 3810, 3750), with multiple form factors (wire-ended, SMD, coiled, pre-assembled). For industrial temperature measurement in automotive, telecom, and electronics applications.
• KTY Sensor Alternatives (PTC Series) Replacement series for discontinued KTY sensors, featuring nearly identical characteristics in DO-35 glass housing with axial wire connections. Tolerance of ±1%, ±2%, or ±5%, temperature range -55°C to +150°C, available in 1000Ω or 2000Ω resistance values. Available since 2015 for industrial customers needing KTY-compatible alternatives.
• Thermal Fuses Thermal fuses in radial and axial form factors, including variants for DC applications and organic thermal fuses. Provide over-temperature protection by interrupting circuits when a defined temperature threshold is exceeded. For B2B customers in industrial electronics manufacturing.
• Thermal Switches Temperature-activated switches that open or close circuits based on configurable temperature thresholds. For industrial temperature regulation and protection applications.
• Bimetal Thermostats Bimetal thermostats delivering precise temperature regulation for industrial and special applications. Use bimetal thermal expansion to switch at defined temperature thresholds.
• PTC Thermistors & Trigger Devices Positive Temperature Coefficient (PTC) thermistors and release devices for temperature-based sensing, protection, and triggering functions. Used in industrial circuit protection applications.
• Bimetal Temperature Regulators Bimetal-based temperature regulators (including adjustable versions with configurable setpoints) for industrial temperature control applications.
• Electronic Temperature Controllers Electronic temperature controllers providing digital precision temperature regulation for industrial process control applications.
• NTC Thermistors Negative Temperature Coefficient (NTC) thermistors for temperature measurement and circuit compensation in industrial applications.
• Temperature Probes Complete temperature probe assemblies integrating sensing elements for various industrial measurement applications.
• TVS Diodes Transient Voltage Suppression (TVS) diodes for protection against voltage spikes and transient overvoltages in electronic circuits.
• Thyristor Surge Arresters Thyristor-based surge arresters that clamp overvoltages by switching to a low-impedance state, for overvoltage protection in industrial electronics.
• Metal Oxide Varistors (MOV) Metal oxide varistors in standard and high-surge variants, plus thermally protected varistors that combine overvoltage clamping with thermal safety. For industrial overvoltage protection.
• Gas Discharge Tubes (GDT) Gas discharge tubes for surge protection, dissipating overvoltage energy by ionizing a gas medium. For telecom, signal, and power-line protection.
• Overvoltage Protection Modules Integrated surge protection modules and dedicated devices for low-voltage systems, PV (solar) systems, signal networks, and street lighting installations.
• PTC Thermistors for Overload Protection PTC thermistors used as overcurrent/overload protection in electronic circuits, switching to high resistance when current exceeds safe limits.
• NTC Inrush Current Limiters NTC thermistor-based inrush current limiters that protect circuits during power-up by limiting surge currents in capacitive loads.
• Fusible Resistors Fusible resistors (including thermally protected variants) that combine resistive and fuse functions in a single component for circuit protection.
• Melting Fuses Conventional melting fuses for circuit protection against overcurrent conditions in industrial electronics.
• PPTC Resettable Fuses Polymer Positive Temperature Coefficient (PPTC) resettable fuses for reversible overcurrent protection, self-restoring after fault clearance.
• Heat CutOff (HCO) Active Circuit Protection Heat CutOff active circuit protection devices that interrupt circuits upon detection of unsafe thermal conditions, enhancing electronic system safety.
• Idea Thermal CutOff (iTCO) Idea Thermal CutOff active circuit protection devices providing thermal-triggered circuit interruption for safety-critical electronic systems.
• Switches and Buttons Industrial switches and buttons spanning rocker, toggle, slide, pushbutton, anti-vandalism, rotary, tactile, multi-function, emergency push-pull, and DIP variants, plus associated accessories. For industrial and equipment-manufacturer use.
• Capacitors Electronic capacitors for various circuit applications, supplied as part of the passive component portfolio.
• Mechanical Components Mechanical components and hardware for use in electronic assemblies.
• Custom Cable Assembly Custom cable assembly and wiring harness manufacturing services for industrial customers requiring tailored cabling integrated with sensing or protection components.

Quantifiable outcome

• Standard-Temperaturbereich -50°C bis +600°C – auch erweiterte Modelle -200°C bis +850°C
• +2 more outcomes

Named customers1 record

Segments4 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Heraeus Nexensos: Heraeus Nexensos (formerly Heraeus Sensor Technology) is a leading manufacturer of platinum thin-film RTD temperature sensors, the closest direct competitor to Alpha Therm in platinum temperature-sensing technology. Both firms produce Pt100/Pt1000 sensors to DIN EN 60751 and serve automotive, process, and electronics customers globally.
• Innovative Sensor Technology (IST AG): IST AG is a Swiss specialist in thin-film and wire-wound platinum and nickel RTD temperature sensors with a comparable niche focus to Alpha Therm. Both serve industrial, automotive, and process-industry OEMs with precision temperature sensing and overlap heavily in product category, customer base, and technology.
• Jumo GmbH & Co. KG: Jumo is a German manufacturer of industrial temperature sensors, thermostats, and electronic temperature controllers, directly comparable to Alpha Therm's temperature-sensing and temperature-control product lines. Both are Mittelstand firms serving European industrial OEMs with overlapping thermal-management and control portfolios.

Broad incumbents

• WIKA Alexander Wiegand SE & Co. KG: WIKA is a much larger global measurement specialist offering platinum RTDs, thermocouples, and process instrumentation. It overlaps Alpha Therm in industrial temperature sensing but operates at a significantly larger scale and broader portfolio, including pressure and level instrumentation.
• Littelfuse, Inc. Littelfuse is a global leader in circuit protection — including fuses, PTC resettable devices, TVS diodes, varistors, and gas discharge tubes — directly overlapping Alpha Therm's overload and overvoltage protection categories. As a broad incumbent, it competes at scale across automotive, telecom, and industrial customers.
• Bourns, Inc. Bourns manufactures circuit protection components (MOVs, TVS diodes, PTC thermistors, thermal fuses) and resistive products, overlapping with Alpha Therm's overvoltage, overload, and temperature-protection lines. As a broad US-based passive-component incumbent, it competes in similar automotive and industrial channels at much greater scale.
• Vishay Intertechnology, Inc. Vishay is one of the world's largest manufacturers of passive electronic components, including platinum RTDs, NTC/PTC thermistors, and circuit protection devices. It competes with Alpha Therm across virtually every product family it sells, but at vastly greater scale and with a global distribution footprint.
• TDK Electronics (EPCOS): TDK's EPCOS line is a major manufacturer of NTC/PTC thermistors, varistors, and surge protection devices, directly overlapping Alpha Therm's temperature-sensing and overvoltage-protection portfolios. As a broad global incumbent, EPCOS competes on scale, automotive qualification, and breadth of catalog.
• Endress+Hauser Group: Endress+Hauser is a major process-automation and measurement specialist offering industrial temperature sensors (RTDs and thermocouples) and instrumentation. It overlaps with Alpha Therm in industrial platinum temperature sensing but operates at much larger scale and with a broader process-instrumentation focus.
• TE Connectivity plc: TE Connectivity is a global broad-line connector and sensor manufacturer offering platinum RTD temperature sensors, thermistors, and circuit protection components. As a much larger diversified incumbent, it competes with Alpha Therm in automotive and industrial temperature sensing and protection applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/alpha-therm-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Alpha Therm