PX103G2 Equivalent & Substitute Parts

Part Overview

The PX103G2 is an NTC thermistor manufactured by Littelfuse Inc., featuring a 10kΩ resistance at 25°C with a B value of 3575K. This component is classified as a temperature sensor in bead form with epoxy packaging and free-hanging mounting configuration. The product is currently obsolete, making identification of suitable substitute components essential for ongoing applications and new designs requiring equivalent thermal sensing capabilities.

Substiute Parts

PX103G2

Littelfuse Inc.In Stock: 1064PX103G2 Datasheet

Current PartRFQ

701006

TE Connectivity Measurement SpecialtiesIn Stock: 2897701006 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PX103G2 is determined by the following critical parameters:

• Resistance Value: 10kΩ at 25°C (primary electrical characteristic)
• B Value: Nominal 3575K (thermal response characteristic)
• Package Type: Bead form with epoxy encapsulation
• Mounting Configuration: Free-hanging lead wire assembly
• Operating Temperature Range: Minimum -55°C to 120°C coverage
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The substitute part 701006 meets these core substitution criteria through equivalent electrical specifications and compatible physical form factor.

Parameter Comparison

Engineering Selection Recommendations

The 701006 from TE Connectivity Measurement Specialties is a direct substitute for the obsolete PX103G2. Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent component selection.

The 701006 offers improved specifications in several areas: tighter resistance tolerance (±0.2°C versus ±1°C), documented B value tolerance (±0.8%), and extended operating temperature range (-55°C to 150°C versus -55°C to 120°C). The substitute maintains the critical 10kΩ resistance and 3574K B value, with negligible deviation (1K difference) from the original specification.

Physical differences include longer lead wire length (3.00" versus 1.50"), which may require mechanical accommodation in existing designs. The substitute is currently in active production status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 701006 be used as a direct replacement for the PX103G2?

A: Yes. Both components share the same 10kΩ resistance value at 25°C and equivalent B values (3575K versus 3574K). Regulatory compliance is identical. Physical lead wire length differs, requiring verification of mechanical fit in the application.

Q: What is the significance of the B value difference (3575K vs. 3574K)?

A: The B value determines the thermistor's thermal response curve. The 1K difference represents 0.03% deviation, which is negligible for most temperature sensing applications. The 701006 provides documented B value tolerance (±0.8%), enabling more precise thermal calculations.

Q: Does the longer lead wire length (3.00" vs. 1.50") affect electrical performance?

A: Lead wire length does not affect the thermistor's electrical characteristics. However, longer leads may require mechanical repositioning in circuit board layouts or sensor mounting configurations. Verify physical clearance and thermal coupling requirements in your specific application.

Q: Are both components RoHS and REACH compliant?

A: Yes. Both the PX103G2 and 701006 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: Why is the PX103G2 obsolete while the 701006 remains active?

A: Product lifecycle decisions are manufacturer-specific. The 701006 remains in active production by TE Connectivity, ensuring continued availability and support. The PX103G2 has been discontinued by Littelfuse, making the 701006 the recommended alternative for new designs and ongoing applications.