Ametherm SMD Thermistors / Inrush Current Limiters

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Ametherm SMD Thermistors

Quick Overview

Ametherm NTC (Negative Temperature Coefficient) SMD Thermistors are compact, multilayer devices that reduce resistance as temperature increases. They are widely used for temperature detection, measurement, and compensation, such as monitoring battery charging to detect when a battery is fully charged.

Ametherm SMD thermistors

Details

Ametherm offers a broad selection of Surface Mount NTC Thermistors, ideal for high-density electronic designs due to their small size, accuracy, and quick response time. Ametherm’s thermistors are well-regarded for their effectiveness in temperature detection and compensation, being both lightweight and space-efficient.

These surface mount thermistors are highly beneficial for applications requiring precise temperature control, including industrial, HVAC, and medical fields. Their small form factor allows easy integration into tight spaces, and their rapid response time enables quick adjustments in temperature-sensitive systems. Compatibility with automated assembly processes makes them suitable for mass production.

Applications:

Temperature Compensation Circuits
Relay Coils
LCD Controls
Temperature Measurement

Features:

Nickel Barrier Termination
Suitable for Wave or Reflow Soldering
Packaging Options: T/R STD QTY 100-5000
Moisture Sensitivity Level: 2

Ametherm’s SM04, SM06, and SM08 series surface-mount thermistors offer high-accuracy temperature compensation and measurement with maximum power ratings of 125 mW, 200 mW, and 250 mW, respectively. These thermistors feature thermal time constants as low as 1.5 seconds and profiles as thin as 0.35 mm, making them ideal for space-constrained designs like LCD controls, relay coils, and hybrid circuits. They offer a cost-effective alternative to radially leaded and through-hole thermistors, supporting automated insertion during manufacturing.

Available resistance ranges from 200 Ω to 470 kΩ, with tight tolerances down to 1% and beta values ranging from 2500 °K to 4500 °K. Operating temperatures range from -40°C to +125°C. The SM04, SM06, and SM08 series feature nickel barrier terminations suitable for wave and reflow soldering, and they are offered in tape-and-reel packaging in quantities of 100 to 5,000 pieces.

Device Specifications:

Type: SM04, SM06, SM08
Resistance Range (Ω): 300-470K, 250-470K, 200-250K
Dissipation Constant (mW/°C): 1.10, 1.50, 2.00
Thermal Time Constant (sec): 1.50, 2.00, 2.50
Maximum Power (mW): 125, 200, 250

Samples of the SM04, SM06, and SM08 series are available from IBS Electronics with delivery in 3 to 5 days. Pricing for U.S. delivery starts at $0.22 per piece in 5,000-piece quantities.

KR Series Surface Mount Thermistors
Ametherm RTI manufactures precision resistance-temperature SMD thermistors available in standard values from 250 ohms to 150,000 ohms. These thermistors are suitable for a wide range of temperature sensing applications with an operating temperature range from -55°C to +150°C and a dissipation constant of 2mW/°C.

Features:

Standard Sizes
High Sensitivity
Accurate & Stable
Wide Ohmic Value Range
Fast Thermal Response Time

Popular Applications:

LED Control
Temperature Compensation
Power Transistor Stabilization
Temperature Measurement & Control

When selecting SMD NTC devices, consider the nominal resistance value at a specified temperature, power dissipation, required accuracy, and resistance values & temperature coefficient. Custom sizes and values are also available based on application and volume requirements.

Configuration Options: