GL102E5J Equivalent & Substitute Parts

Part Overview

The GL102E5J is an NTC thermistor manufactured by Littelfuse Inc., featuring a 1kΩ resistance at 25°C with a B25/85 value of 3348K. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing applications and new designs. The GL102E5J operates across a wide temperature range of -55°C to 300°C and is packaged as a through-hole glass bead thermistor with 1.00" lead wire length.

Substiute Parts

GL102E5J

Littelfuse Inc.In Stock: 863GL102E5J Datasheet

Current PartRFQ

GA1K2A1

TE Connectivity Measurement SpecialtiesIn Stock: 4992GA1K2A1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GL102E5J is based on the following critical parameters that must align for functional equivalence:

• Resistance value at 25°C: 1kΩ
• B25/85 thermal coefficient: 3348K
• Package configuration: Glass bead thermistor
• Electrical performance characteristics within specified tolerances

The GA1K2A1 manufactured by TE Connectivity Measurement Specialties meets the primary electrical specifications (1kΩ resistance and 3348K B25/85 value) and maintains the glass bead package type. However, operational differences exist in temperature range and mounting configuration that must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

The GA1K2A1 serves as an active substitute for the obsolete GL102E5J based on matching core electrical parameters: 1kΩ nominal resistance and 3348K B25/85 thermal coefficient. Both components maintain REACH compliance and share the same HTSUS classification (8533.40.8070).

Selection of GA1K2A1 requires verification that the application operates within its narrower temperature range (-40°C to 100°C) compared to the GL102E5J (-55°C to 300°C). The GA1K2A1 is RoHS3 compliant with MSL rating of 1 (Unlimited), providing enhanced environmental compliance for new designs. The free-hanging mounting configuration of the GA1K2A1 differs from the through-hole design of the GL102E5J and must be accommodated in circuit board layout and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can GA1K2A1 directly replace GL102E5J in all applications?

A: GA1K2A1 matches the critical electrical specifications (1kΩ resistance and 3348K B25/85 value) required for thermal sensing functionality. However, applications requiring operation below -40°C or above 100°C cannot use GA1K2A1, as the GL102E5J supports -55°C to 300°C. Additionally, the mounting configuration differs (free-hanging versus through-hole), requiring circuit design adaptation.

Q: What are the key parameters that determine substitution compatibility?

A: The primary parameters are resistance value at 25°C (1kΩ), B25/85 thermal coefficient (3348K), and package type (glass bead). These parameters define the thermistor's thermal response characteristics. Operating temperature range and mounting type are secondary considerations dependent on specific application requirements.

Q: Is GA1K2A1 suitable for high-temperature applications?

A: No. GA1K2A1 operates to a maximum of 100°C, whereas GL102E5J operates to 300°C. Applications requiring high-temperature sensing must identify alternative substitutes with extended temperature ratings or continue sourcing GL102E5J from available inventory.

Q: What compliance advantages does GA1K2A1 offer?

A: GA1K2A1 is RoHS3 compliant and carries MSL rating 1 (Unlimited), providing enhanced environmental and moisture handling characteristics suitable for modern manufacturing processes. Both components maintain REACH compliance.