PW102J2 Equivalent & Substitute Parts

Part Overview

The PW102J2 is an NTC thermistor manufactured by Littelfuse Inc., designed as a 1kΩ bead-type temperature sensor with epoxy packaging. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing applications and new designs. The PW102J2 operates at a maximum temperature of 120°C with a power rating of 30 mW and features free-hanging mounting configuration.

Substiute Parts

PW102J2

Littelfuse Inc.In Stock: 784PW102J2 Datasheet

Current PartRFQ

2152723105

MolexIn Stock: 11632152723105 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 2152723105 from Molex qualifies as a substitute based on the following critical parameters:

• Resistance value: Both parts specify 1kΩ at 25°C
• B0/50 thermal coefficient: Both parts specify 3892K
• Package type: Both are bead-type epoxy thermistors
• RoHS compliance: Both are ROHS3 compliant
• HTSUS classification: Both share the same tariff code (8533.40.8070)

The 2152723105 is an active product with expanded operating temperature range (-40°C to 135°C) compared to the PW102J2 (120°C maximum), providing broader application flexibility while maintaining core thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 2152723105 is the recommended substitute for PW102J2 applications based on the following factors:

• Both components maintain identical resistance values and B-coefficient specifications, ensuring equivalent thermal response characteristics
• The 2152723105 is an active product with current manufacturing support, addressing the obsolescence status of the PW102J2
• Both parts meet ROHS3 compliance requirements for regulated applications
• The 2152723105 provides an extended operating temperature range, supporting applications requiring operation below 0°C or above 120°C
• Lead wire length differs by 5mm (38mm vs 33mm), requiring mechanical layout verification in space-constrained applications
• Mounting configuration differs (free hanging vs through hole), necessitating PCB design adjustment

Frequently Asked Questions (FAQ)

Q: Can the 2152723105 directly replace the PW102J2 in all applications?

A: The 2152723105 is electrically equivalent based on resistance and B-coefficient values. However, mechanical differences exist: lead wire length is 5mm shorter, and mounting type differs from free hanging to through hole. Verify mechanical fit and mounting compatibility before substitution.

Q: What is the significance of the B0/50 value of 3892K?

A: The B0/50 value defines the thermal sensitivity of the NTC thermistor. Both parts specify 3892K, meaning they exhibit identical temperature-resistance relationships across their operating ranges, ensuring equivalent thermal response in temperature sensing applications.

Q: Why is the operating temperature range different between these parts?

A: The PW102J2 specifies a maximum operating temperature of 120°C, while the 2152723105 operates from -40°C to 135°C. The 2152723105's extended range provides flexibility for applications requiring broader temperature coverage, though both parts function identically within the PW102J2's original 120°C limit.

Q: Are there tolerance differences that affect substitution?

A: The PW102J2 specifies ±0.5°C resistance tolerance, while the 2152723105 specifies ±1% tolerance. The 2152723105 also includes B-value tolerance specification (±1%), providing additional thermal coefficient certainty. Both tolerances are acceptable for standard temperature sensing applications.

Q: What compliance certifications apply to both parts?

A: Both the PW102J2 and 2152723105 are ROHS3 compliant and share the same HTSUS tariff classification (8533.40.8070), meeting regulatory requirements for controlled markets and trade applications.