Semitec

The Semitec AT-2 range of NTC thermistors were the first to use lead-frame production technology, creating consistently accurate 1% tolerance thermistors at a significantly lower cost than other NTCs.

• R25 values from 1k ohm to 100k ohms
• Uniform shape aids automatic assembly
• Excellent long term reliability

Semitec AT-4 NTC thermistors have flexible, PVC insulated lead-wires therefore offering all the technical benefits of the popular AT-2 thermistor but help simplify the assembly process.

• High accuracy ±1% R25 resistance
• Operating temperature range: -30℃ to 90℃
• Long term reliability

Semitec 103AT-5 thermistors incorporate the industry standard 103AT-2 NTC chip but are fitted with 30mm long solid bare lead-wires (0.5mm dia).  Available in a tape/reel format for auto-insertion.

• ±1°C accuracy (or less) between -50°C and +80°C
• ±1% R25 and B25/85 tolerances
• Tape/Reel Options for auto-insertion

Semitec AP-2 thermistors offer RT curve-matched accuracy in a rigid lead format, making them ideal for over-moulded temperature probes, p.c.b. mounting and automotive applications.

• High accuracy ±0.5% R25 & Beta value tolerances
• Temperature Range: –60°C to +150°C
• Extensive range stock, 9 values from 2kΩ to 200kΩ

Using miniature FT thermistor technology, Semitec have developed a non-contact sensor which can be easily installed, is self-compensating and withstands more aggressive environments than conventional infra-red sensors.

• High dust resistance
• Operating temperature range: -10°C to 150°C
• Resistant to electrical noise

CRDs are current regulating diodes (or constant current diodes) that help to maintain a fixed current value over a wide voltage range.

• Constant current values from 0.1mA to 22mA
• Operating temperature range:  -40°C to 150°C
• Can be used in parallel or in series with Zener diodes

Zenamic MOVs have large surge current handling capabilities.

• Peak current surges of up to 6500A (8/20 s) and peak power surges of up to 565J (10/1000 s) respectively can be limited by these fast-acting devices.

Semitec AT-11 waterproof NTC thermistor sensors are TPE-encapsulated and offer IP67 integrity where you need security against moisture ingress.  The 103AT-11 version uses our very popular 103AT-2 thermistor.

• Temperature range: -50°C to +110°C
• Offers IP67 waterproof protection with 3.75kV isolation
• Small tip ensures a fast response

Semitec FT thin film thermistors outperform conventional SMD thermistors due to their miniature size, extreme thinness and high heat resistance.  Available as SMD, with radial /axial leads (FL type), within assemblies or ring sensors

• Less than 0.15mm thin available
• Wide temperature range; -50°C to +350°C
• Thin substrate enables a very-fast response
• Glass passivation ensures moisture resistance

Using the latest thin-film thermistor technology, Semitec’s F-micro miniature temperature sensor has been specifically designed for the medical instrument market.

• Extremely fast response time (<52ms)
• Laser trimmed high accuracy (±0.14K at 37°C)
• Miniature 0.5mm (or 0.3mm) diameter tip

Semitec’s NT-4 series thermistor is a small, glass-encapsulated bead NTC sensor.  The bead size is just 1.25mm diameter, extremely robust and ensures the NT-4 has a fast-response and also moisture resistant.

• Wide operating range: -50°C to +300°C
• Fast thermal response
• High accuracy and extremely reliable

Semitec’s JT series thermistors are ultra-thin flexible film NTCs that provide a very fast response to temperature change.  Laminated within 2 polymer layers, it is one of thinnest available worldwide.

• Maximum 0.5mm thickness ensures fast response time
• Flexible film format, with various R25 values
• Operating range -50°C/+125°C

Semitec HT series SMD thermistors are encapsulated NTC elements in a plastic casing.  The same size as a 1206 SMD chip thermistor, the HT package offers a unique and superior SMD temperature sensor.

• Encapsulated NTC elements in an SOD-123 package
• Standard SMD or axial lead version (HTF)
• Operating temperature range: -40°C to +125°C

Originally designed for clinical thermometer applications, this small bead NTC thermistor is very versatile and suitable for a range of applications from heat detectors to miniature temperature sensors.

• Small bead design ensures a very fast response
• Operating temperature range: -40°C to+100°C
• Various insulated lead-wire options

An epoxy-coated temperature sensor where the NTC is encapsulated in several layers of epoxy, providing a seal for environmental and mechanical protection.  Offers a lower-cost sensor solution.

• Epoxy-overcoat offers up to IP67 waterproof protection
• Temperature range: -50°C to +110°C (125°C)
• Cable length: 50mm to 10 metres

The ET-3H thermistor was originally developed for clinical thermometer applications. With bead sizes of 1.4mm (or less) and flexible wire.

• Fast response time and high accuracy
• R37 tolerances of ±1% or smaller
• Long term reliability

The STS1 pipe-clip temperature sensor is IP67 rated and using our FT thin-film thermistor, it offers a very fast thermal response.  Suitable for Legionnaires monitoring and hot water boiler systems.

• Typical Time Constant (Tc) = ≤1s
• Temperature Accuracy at 85°C is ±1°C
• IP67 rated housing

Semitec’s KT series SMD NTC thermistors offers a compact range of R25 values in 0603 and 0402 package sizes.  The ±1% R25 and B value tolerances means temperature accuracy of ±0.5°C or better.

• R25 and B value tolerances ±1%
• R25 values; 10k, 50k and 100kohms
• Operating temperature range: -40°C to 125°C

This versatile temperature sensor assembly is ideal for air-sensing, particularly for use in fire alarms and heat detectors, component and battery monitoring, rechargeable batteries and medical sensors.

• Fast response design (Tc ≤ 1s)
• High accuracy ±1%
• Operating temperature range: -40°C  to +125°C

High temperature flexible film NTC thermistor sensors for monitoring surface temperatures up to 230°C.  Laser-printers, photocopiers and catering applications all benefit from using these “soft touch” sensors.

• Fast response design (Tc ≤ 1s)
• High temperature point calibrations e.g. at 180°C
• Operating range up to 230°C

The Semitec 10TP series thermopile is a very fast-acting IR (infrared) sensing device suitable for non-contact applications.  Typical applications include clinical ear thermometers, PCR machines, etc.

• Operating temperature range: -10°C to +100°C
• Very Fast Response, Tc = 15ms
• Built-in Temperature Compensation