PW103G2 Equivalent & Substitute Parts

Part Overview

The PW103G2 is an NTC thermistor manufactured by Littelfuse Inc., featuring a 10kΩ resistance at 25°C with a B0/50 value of 3575K. This component is classified as a temperature sensor in bead form with epoxy packaging and free-hanging mounting configuration. The PW103G2 is currently listed as obsolete, making identification of suitable substitute components essential for ongoing applications and new designs requiring equivalent thermal sensing capabilities.

Substiute Parts

PW103G2

Littelfuse Inc.In Stock: 1085PW103G2 Datasheet

Current PartRFQ

701006

TE Connectivity Measurement SpecialtiesIn Stock: 2897701006 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PW103G2 is determined by the following critical parameters:

• Resistance Value: 10kΩ at 25°C (primary electrical characteristic)
• B-Value Thermal Coefficient: B0/50 range of 3574K–3575K (determines temperature response curve)
• Package Configuration: Bead form with free-hanging mounting
• Compliance Standards: ROHS3 compliance and REACH unaffected status
• Operating Temperature Range: Minimum capability of 120°C

The substitute part 701006 meets these criteria with a B0/50 value of 3574K (within 1K of the original), identical 10kΩ resistance specification, and compatible bead packaging. Both components share ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The 701006 from TE Connectivity Measurement Specialties is a direct functional substitute for the obsolete PW103G2. Both components share identical 10kΩ resistance specifications and nearly equivalent B0/50 thermal coefficients (3574K vs. 3575K), ensuring comparable temperature sensing performance across the operating range.

The 701006 offers several advantages: active product status ensures ongoing availability, an extended operating temperature range (-55°C to 150°C) exceeds the PW103G2 specification, and improved resistance tolerance (±0.2°C vs. ±0.5°C) provides tighter performance control. Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.

The primary design consideration is lead wire length: the 701006 provides 3.00" (76.20mm) leads compared to the PW103G2's 1.50" (38.00mm). Applications requiring the original shorter lead length may necessitate trimming or mechanical adaptation during assembly.

Frequently Asked Questions (FAQ)

Q: Can the 701006 directly replace the PW103G2 in existing designs?

A: Yes, the 701006 is functionally equivalent for thermal sensing applications. The primary consideration is lead wire length, which is doubled in the substitute part. Mechanical integration may require lead trimming or repositioning depending on circuit board layout constraints.

Q: What is the significance of the B0/50 value in thermistor selection?

A: The B0/50 value defines the thermistor's temperature response curve. The PW103G2 (3575K) and 701006 (3574K) differ by only 1K, resulting in negligible thermal response variation across the operating range. This 0.03% difference is within typical application tolerances.

Q: Are there compliance differences between these components?

A: Both the PW103G2 and 701006 are ROHS3 compliant and REACH unaffected. They share identical ECCN (EAR99) and HTSUS (8533.40.8070) classifications, ensuring equivalent regulatory and trade compliance.

Q: Why is the 701006 rated for -55°C to 150°C when the PW103G2 only reaches 120°C?

A: The 701006 has a broader qualified operating temperature range. Applications limited to 120°C operation will function within both components' specifications. The extended range of the 701006 provides design flexibility for future applications without component substitution.

Q: What is the impact of the improved resistance tolerance on circuit performance?

A: The 701006's ±0.2°C tolerance (versus ±0.5°C for the PW103G2) reduces initial resistance variation between individual components. This tighter tolerance improves consistency in temperature measurement accuracy and reduces calibration scatter in production environments.

Q: Is the longer lead wire length a compatibility issue?

A: Lead wire length is a mechanical consideration, not an electrical one. The 701006's 3.00" leads can be trimmed to match the original 1.50" specification if space constraints require it. Ensure trimming does not compromise component integrity or create sharp edges that could damage insulation.