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NB12K00103JBB

10kOhm NTC chip thermistor, 0805, B=3630K ±3%, ±5% tolerance, 5s thermal time constant, AEC-Q200

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Manufacturer Part：

NB12K00103JBB

Package：

0805 (2012 Metric) 2.0 x 1.25 x 1.3 mm

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Description

Product Overview

The NB12K00103JBB is an NTC (Negative Temperature Coefficient) chip thermistor manufactured by KYOCERA AVX, part of the NB12 series. It features a nominal resistance of 10 kOhm at 25°C with ±5% tolerance in a compact 0805 (2012 Metric) surface-mount package. With a B-constant of 3630K (±3%), thermal time constant of 5 seconds in air, and thermal dissipation factor of 2 mW/°C, this thermistor provides accurate temperature sensing and compensation. AEC-Q200 qualified, it operates over a temperature range of -55°C to +150°C and features nickel barrier metallization for outstanding solderability.

Key Specifications

Type NTC Thermistor
Resistance @ 25°C 10 kOhm
Resistance Tolerance ±5%
B-Constant 3630K
B-Constant Tolerance ±3%
Package / Case 0805 (2012 Metric)
Dimensions 2.0 x 1.25 x 1.3 mm
Thermal Time Constant (in Air) 5s
Thermal Dissipation Factor 2 mW/°C
Temperature Coefficient -4%/°C
Operating Temperature Range -55°C to +150°C
Termination SMD with Nickel Barrier
Mounting Surface Mount
Qualification AEC-Q200
EU RoHS Compliant with Exemption

Features

  • AEC-Q200 qualified for automotive applications
  • High quality NTC chip thermistor for surface mounting
  • Nickel barrier metallization for outstanding solderability
  • Wide resistance range available in NB12/NB20 series
  • Fast thermal response with 5s time constant
  • Compact 0805 package for high-density mounting
  • Suitable for both temperature compensation and control

Applications

  • Temperature compensation in LCD displays and battery packs
  • Mobile phones and portable electronics temperature sensing
  • HVAC and air-conditioning systems
  • Switch mode power supply temperature control
  • Power transistor protection in various electronic circuits
  • Automotive engine and cabin temperature monitoring

The NB12K00103JBB is a high-quality NTC chip thermistor from KYOCERA AVX’s NB12 series, specifically developed for surface mounting applications. With a nominal resistance of 10 kOhm at 25°C and a B-constant of 3630K, this thermistor provides accurate and reliable temperature measurement across a wide operating range of -55°C to +150°C. The nickel barrier metallization ensures outstanding solderability, enabling the component to withstand the most severe soldering processes. The compact 0805 package with a 5-second thermal time constant makes it ideal for applications requiring fast thermal response. AEC-Q200 qualification ensures automotive-grade reliability for demanding environments.

The NB12K00103JBB operates as an NTC thermistor through the following mechanism:

1. NTC Characteristic: The resistance decreases as temperature increases, following the Steinhart-Hart equation: 1/T = A + B(ln R) + C(ln R)^3, where R is resistance and T is absolute temperature.

2. B-Constant: The relationship between resistance and temperature is characterized by the B-constant (3630K), which defines the slope of the R-T curve between two reference temperatures (typically 25°C and 85°C).

3. Thermal Response: With a thermal time constant of 5 seconds in still air, the thermistor responds quickly to temperature changes, making it suitable for real-time monitoring applications.

4. Dissipation: The thermal dissipation factor of 2 mW/°C indicates the power required to raise the thermistor temperature by 1°C above ambient, which must be considered to avoid self-heating errors in measurement circuits.

Terminal Name Type Function
1 Terminal A Passive NTC thermistor terminal – one end of the thermistor element
2 Terminal B Passive NTC thermistor terminal – other end of the thermistor element

Note: This is a 2-terminal NTC thermistor with no polarity. The 0805 package has wraparound terminations. Self-heating must be minimized by using low measurement currents.

Application Circuit Role Key Requirement
Battery Pack Temperature monitoring for charge/discharge control 10kOhm @ 25°C, AEC-Q200
LCD Display Temperature compensation for contrast adjustment NTC -4%/°C slope, fast response
SMPS Over-temperature protection and thermal shutdown -55°C to +150°C range
Automotive HVAC Cabin temperature sensing AEC-Q200, high reliability
Power Transistor Protection Junction temperature monitoring 5s thermal time constant
Manufacturer Part Number Package Key Specs Notes
Murata NCP18XH103J03RB 0805 10kOhm, B=3380K, ±5% Different B-constant
TDK NTCG164BH103JT1 0603 10kOhm, B=3380K, ±5% Smaller package
Vishay NTCS0805E3103JMT 0805 10kOhm, B=3977K, ±5% Different B-constant
Panasonic ERTJ1VG103FA 0603 10kOhm, B=3450K, ±1% Higher precision
Amphenol RL2010-103-103-S 0805 10kOhm, B=3950K, ±5% Different B-constant
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