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ERTJ1VR103J

NTC thermistor 10kΩ @ 25°C, B=4250K, 0603, ±5%, multilayer

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Manufacturer Part：

ERTJ1VR103J

Package：

0603 (1608 Metric) - 1.6 x 0.8 x 0.6mm

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Description

Product Overview

The ERTJ1VR103J from Panasonic is an NTC (Negative Temperature Coefficient) thermistor in a 0603 (1608 metric) chip package, with a nominal resistance of 10kΩ at 25°C and B-value of 4250K. This multilayer SMD thermistor provides accurate temperature measurement for thermal management, temperature compensation, and over-temperature protection in compact electronic systems.

Key Specifications

Thermistor Type NTC (Negative Temperature Coefficient)
Resistance at 25°C (R25) 10kΩ ±5%
B-Value (B25/50) 4250K ±2%
Package 0603 (1608 Metric) – 1.6 x 0.8 x 0.6mm
Operating Temperature -40°C to +125°C
Construction Multilayer / Monolithic
Terminal Sn (lead-free)

Features

  • 10kΩ R25 with ±5% tolerance for accurate temperature sensing
  • B25/50 value of 4250K ±2% for predictable resistance-temperature curve
  • Multilayer monolithic construction for high reliability
  • 0603 chip package compatible with standard SMT assembly
  • Wide -40°C to +125°C operating range

Applications

  • Battery pack temperature monitoring for safety and charge control
  • CPU and memory module temperature sensing
  • LCD display contrast temperature compensation
  • Crystal oscillator frequency temperature compensation
  • Consumer electronics over-temperature protection

The ERTJ1VR103J from Panasonic is an NTC thermistor in a 0603 (1608 metric) multilayer chip package with a nominal resistance of 10kΩ at 25°C and B25/50 constant of 4250K. As a negative temperature coefficient device, its resistance decreases predictably with increasing temperature, enabling accurate temperature measurement using a simple voltage divider circuit. The ±5% R25 tolerance and ±2% B-value tolerance provide good measurement accuracy. The multilayer monolithic construction ensures reliability and mechanical robustness for SMT assembly. The part numbering follows Panasonic ERTJ convention: ERT=NTC thermistor, J=chip type, 1V=0603 size, R103=10kΩ (10×10³), J=±5% tolerance.

The ERTJ1VR103J uses a multilayer NTC (Negative Temperature Coefficient) ceramic construction based on transition metal oxide semiconductors (typically manganese, nickel, and cobalt oxides). When temperature increases, the thermal energy excites charge carriers in the semiconductor ceramic, increasing the number of free electrons and holes, which dramatically reduces the bulk resistance. The relationship between resistance and temperature follows the Steinhart-Hart equation or the simplified B-parameter equation: R(T) = R25 × exp[B × (1/T – 1/T25)], where B = 4250K is the material constant. At 25°C the resistance is 10kΩ, dropping to approximately 3.9kΩ at 50°C and 0.54kΩ at 100°C. This predictable resistance-temperature characteristic enables temperature measurement by reading the thermistor resistance through a voltage divider and ADC.

Pin Name Type Function
1 Terminal 1 Passive One end of NTC element; connect to bias voltage divider
2 Terminal 2 Passive Other end of NTC element
  • Lithium battery pack temperature monitoring for over-temperature charge/discharge cutoff
  • Smartphone CPU/GPU temperature sensing for thermal throttling control
  • LCD module contrast compensation by adjusting bias voltage with temperature
  • TCXO (Temperature Compensated Crystal Oscillator) frequency correction feedback
  • Home appliance motor over-temperature protection and shutdown
Manufacturer Part Number Package Notes
TDK NTCG164BH103JT1 0603 10kΩ NTC, B=4250K
Murata NCP18XH103F03RB 0603 10kΩ NTC, B=3380K
Vishay NTCS0603E3103FMT 0603 10kΩ NTC, B=3977K
SEMITEC 103AT-4 0603 10kΩ NTC, B=3435K
Ametherm ACC-003-004 0603 10kΩ NTC
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

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Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
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Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

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  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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