What SEMITEC Corporation does

SEMITEC Corporation (SEMITEC株式会社) is a Japanese electronic component manufacturer with approximately 1,001-5,000 employees, publicly listed on the Tokyo Stock Exchange under ticker 6626 and headquartered in Sumida, Tokyo. The company was founded circa 1958-1959 and has held its 70th annual shareholder meeting by June 2026, indicating a multi-decade operating history. Its product portfolio centers on temperature-sensitive and related electronic components, with NTC (Negative Temperature Coefficient) thermistors — including proprietary thin-film thermistor technology — as the core offering. Complementary component families include surge absorbers marketed under the Zenamic (metal oxide varistor) and VRD (silicon-based) brands, constant current diodes under the CRD brand, and power thermistors. The company has also developed applied sensor products such as gas sensors, barometric pressure sensors, humidity sensors, wind speed sensors, and thermopiles.

The company serves a diverse end-market footprint spanning automotive, medical devices, mobile devices, LED lighting, industrial equipment, beauty appliances, and smart city infrastructure. Notable disclosed end-customer signals include operators of smart city infrastructure in China. Go-to-market is multi-tiered, relying on third-party distributors, the company's own sales offices, and an online sample shop that supports direct small-quantity purchases. Pricing is not publicly disclosed, and revenue is not transparently broken out by segment in available materials. Regulatory credentials cited include UL and RoHS certifications supporting qualification into industrial and safety-sensitive applications.

Recent activity points to active product lifecycle management and portfolio expansion. Product launches include a compact wind sensor (December 2024) and a thermal conduction refrigerant gas sensor module (March 2025/2026), with additional sensor categories (tactile, vacuum, motor square) flagged in development. A planned end-of-production for the HT Thermistor Series (March 2025) and publication of replacement power thermistor lists (March 2024) indicate rationalization of legacy SKUs alongside new introductions. The company maintains a distribution partnership with ERIS Corporation in Taiwan to extend Asia-region reach, and disclosed an executive personnel change in May 2026. The raw revenue figures in the input appear corrupted (multitrillion-dollar magnitudes inconsistent with company scale), so underlying revenue direction cannot be reliably inferred from financial line items alone.

Name

SEMITEC Corporation

Legal name

SEMITEC株式会社

Website

https://semitec.co.jp

Company type

Public

Founded year

1959

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

SEMITEC Corporation manufactures NTC thermistors, thin-film temperature sensors, surge absorbers, constant current diodes, and applied sensors across automotive, medical, industrial, mobile, and smart city markets. The Japanese firm is publicly listed on the Tokyo Stock Exchange (ticker 6626).

Ownership category

akta.pro rank

Product category

Electronic Sensors and Components

NAICS

Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416)

SIC

Electronic Components, Nec (3679)

akta.pro primary industry

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

Keywords

• NTC thermistor sensors
• Temperature sensing components
• Constant current diodes
• Surge protection devices
• Electronic sensor modules

Headquarters

HQ city

Sumida

HQ country

Japan

HQ region

Asia

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

Revenue model

1. Sensor Components Sales: SEMITEC generates revenue through the sale of sensor components including thermistors, CRDs, surge absorbers, and sensors. Products are sold through distributors, sales agents, and directly via their sample shop.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels2 records

Core offering

SEMITEC Corporation manufactures and sells NTC (Negative Temperature Coefficient) thermistors and related electronic components, including eight thermistor series (NT, FT, AP, AT, ET, JT, KT, CT), Constant Current Diodes (CRD), Power Thermistors, and surge protection devices (Zenamic metal-oxide varistors and silicon VRD surge absorbers). The company also produces applied sensors for gas, barometric pressure, humidity, wind speed, and non-contact temperature measurement, along with application-specific sensor assemblies for automotive, medical, industrial, and consumer electronics markets.

Product overview

SEMITEC Corporation is a Japanese sensor technology company specializing in temperature sensors and related electronic components. The product portfolio centers on NTC (Negative Temperature Coefficient) thermistors manufactured through two primary technologies: ceramic sintering (chip type) and thin film deposition (thin film type). The core product line includes eight thermistor series (NT, FT, AP, AT, ET, JT, KT, CT) differentiated by precision level, temperature range, and form factor. Supporting products include Constant Current Diodes (CRD S and E series) for LED current regulation, Power Thermistors (D series) for inrush current suppression, and surge protection devices (Zenamic metal oxide varistors and VRD silicon surge absorbers). Applied products extend thermistor technology into gas sensing, barometric pressure measurement, and humidity sensing. The company also offers application-specific sensor assemblies for automotive, medical, industrial, and consumer electronics markets. All products are RoHS compliant.

Differentiator

Problem solved

Functional benefit

Brands

• ゼナミック (Zenamic): Metal-oxide varistor (MOV) surge absorber brand. Zenamic products (Z5D, Z7D, Z10D, Z15D, Z21D, Z25M, Z33M series) are made from zinc oxide (ZnO) as the main raw material, formed and sintered at 1,200–1,400°C, providing non-linear voltage-current characteristics for surge protection.
• VRD (Voltage Regulator Diode)
• CRD (Current Regulative Diode)

Products and services

• NT Thermistor (High Heat Resistance, High Sensitivity, Glass-Sealed) NTC thermistor with glass-sealed construction offering high heat resistance and high sensitivity. Suitable for industrial and automotive temperature sensing applications.
• FT Thermistor (Thin Film) Thin film NTC thermistor using semiconductor manufacturing thin film technology on ceramic substrate. Features high precision and fast response.
• AP Thermistor (Ultra High Precision) Ultra high precision NTC thermistor for applications requiring extremely accurate temperature measurement.
• AT Thermistor (High Precision) High precision NTC thermistor with resin-sealed construction for accurate temperature sensing.
• ET Thermistor (High Sensitivity) Compact, high-sensitivity NTC thermistor with small tolerance for resistance and B constant values. Suitable for medical devices, control equipment, and portable devices.
• JT Thermistor (High Precision, Thin Type) High precision thin film NTC thermistor with ultra-thin 500μm thickness. Features film shape construction and UL safety certification. Used in smartphones, beauty devices, and heated tobacco products.
• KT Thermistor (SMD Square Chip) Surface mount device NTC thermistor in square chip format for automated mounting and space-constrained applications.
• CT Thermistor (High Heat Resistance) High heat resistant NTC thermistor in axial lead format for applications requiring temperature operation up to higher ranges.
• CRD S Series (SMD Type Constant Current Diode) Surface mount constant current diode (Current Regulative Diode) with resin-sealed SMD package. Lower profile than standard packages, designed for thin LED mounting.
• CRD E Series (Axial Lead Type Constant Current Diode) Constant current diode in DO-35 style DHD (Double Heatsink Diode) construction with hermetic sealing. High reliability and cost-effective for mass production.
• Power Thermistor D2 NTC power thermistor for inrush current suppression in switching power supplies and rectifier circuits. UL1434 certified (except D2-22 model).
• Zenamic Metal Oxide Varistor Surge Absorbers Metal oxide varistor surge absorbers made from ZnO (zinc oxide) with additives, sintered at 1200-1400°C. Offers nonlinear voltage-current characteristics for surge protection. Available in Z5D, Z7D, Z10D, Z15D, Z21D, Z25M, Z33M series variants.
• Surge VRD SMD Type (Silicon Surge Absorber) Silicon surge absorber (Voltage Regulator Diode) utilizing silicon junction avalanche effect. Features extremely fast response to surge voltages, suitable for communication line surge protection, ESD countermeasures, and relay/solenoid surge protection.
• Gas Sensor (Thermal Conduction Type) Thermal conduction gas sensor using high-sensitivity thin film thermistor. Detects gases with thermal conductivity differing ±30% from air, including hydrogen, helium, carbon dioxide, and refrigerant gases. Can measure CO2 concentration from 0.5% to 20%.
• Barometric Pressure Sensor Thermal conduction barometric pressure sensor using high-sensitivity thin film thermistor. Measures pressure from 0.15Pa vacuum to 100kPa atmospheric pressure, up to 350kPa pressurized air.
• Relative Humidity Sensor Thermal conduction relative humidity sensor using high-sensitivity thin film thermistor. Detects humidity through differences in thermal conductivity between dry air and humid air. Features continuous measurement capability.
• Thermopile (Thermo-Light) Thermopile sensor for non-contact temperature sensing. Available in narrow field-of-view configuration.
• NC Sensor FP (Non-Contact Temperature Sensor Module) Non-contact temperature sensor module using thermopile technology.
• Compact Wind Sensor TP-MW Series Miniaturized wind speed sensor for mass production. Part of product lineup expansion initiative.
• Thermistor Sensor Modules (OA, Automotive, Medical, Consumer, Industrial) Complete thermistor sensor assemblies configured for specific applications: OA machines, automotive, medical equipment, consumer appliances, and industrial machinery. Include various lead wire, connector, and protective housing configurations.

Named customers1 record

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• ERIS Corporation (Taiwan)standardChannel Partner/ Reseller/ DistributorERIS Corporation of Taiwan handles the distribution of various diode products for SEMITEC, extending SEMITEC's reach in the Taiwanese market for diode and semiconductor products.

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Direct peers

• Vishay Intertechnology: US-based manufacturer of NTC thermistors, temperature sensors, and surge protection components; one of the most directly comparable Western peers across SEMITEC's full sensor and protection portfolio.
• Bourns: Manufacturer of resettable PTC thermistors, MOV surge protectors, and protection circuits that compete head-to-head with SEMITEC's thermistor and surge protection offerings in industrial and automotive applications.
• Shibaura Electronics: Japanese manufacturer of thermistor temperature sensors and resistance temperature detectors (RTDs); one of the closest domestic Japanese peers directly competing with SEMITEC in NTC and PTC thermistor lines.
• Littelfuse: Major supplier of circuit protection devices including metal-oxide varistors (MOVs) and silicon surge protection devices — directly parallel to SEMITEC's Zenamic and VRD surge absorber lines.
• Amphenol (Advanced Sensors / Thermometrics): Through its Thermometrics and PIher brands, Amphenol manufactures NTC thermistors and temperature sensing assemblies directly comparable to SEMITEC's NT/FT/AT/ET series products.

Broad incumbents

• Murata Manufacturing: Japan's largest passive electronic component manufacturer with a broad NTC thermistor lineup and global scale; directly comparable to SEMITEC's core thermistor business but at vastly greater scale across MLCCs, RF, and sensors.
• Panasonic Industry (Passive Components): Panasonic's passive components division produces NTC thermistors, temperature sensors, and protection devices targeting automotive and industrial OEMs in direct competition with SEMITEC.
• TDK Corporation: Global passive component giant with temperature sensors, thermistors, and protection devices (EPCOS brand); directly competes in NTC thermistors and surge protection where SEMITEC plays.
• Honeywell Sensing & Safety: Diversified global sensor manufacturer with temperature, pressure, humidity, and gas sensing lines — directly comparable to SEMITEC's expanding applied thermistor sensor product family and barometric/pressure/humidity sensors.

Others

• Wavelength Electronics: Specialty manufacturer of precision temperature controllers and thermistor-based sensing subsystems; overlaps with SEMITEC's high-precision AP/AT thermistor segment in instrumentation end markets.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks4 records

Key highlights6 records

Customer concentration

• Xx.com/semitecu

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

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 SEMITEC Corporation