GS204R1K Equivalent & Substitute Parts

Part Overview

The GS204R1K is an NTC thermistor manufactured by Littelfuse Inc., featuring a 200kΩ resistance at 25°C in a glass bead package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing applications and new designs requiring equivalent thermal sensing functionality.

Substiute Parts

GS204R1K

Littelfuse Inc.In Stock: 917GS204R1K Datasheet

Current PartRFQ

FP07DB204N

Amphenol ThermometricsIn Stock: 876FP07DB204N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GS204R1K is determined by the following critical parameters:

• Resistance value at 25°C: 200kΩ (primary electrical characteristic)
• Mounting type: Through Hole (mechanical compatibility)
• Package type: Glass construction (thermal and environmental performance)
• Operating temperature range capability
• Resistance tolerance and thermal coefficient stability

The FP07DB204N from Amphenol Thermometrics meets the core electrical requirement of 200kΩ resistance and maintains through-hole mounting compatibility. However, differences in tolerance specifications, operating temperature range, and physical form factor must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The FP07DB204N is an active product with RoHS compliance certification, providing supply chain continuity for applications currently using the obsolete GS204R1K. Both components share identical 200kΩ resistance specifications and through-hole mounting architecture.

Selection of the FP07DB204N requires verification that the application's operating temperature range does not exceed 200°C, as the GS204R1K supports operation to 300°C. The wider resistance tolerance of ±25% on the FP07DB204N compared to ±10% on the GS204R1K may impact thermal measurement accuracy in precision applications.

The physical form factor differs between components: the GS204R1K uses a bead configuration while the FP07DB204N employs a cylindrical probe design. PCB layout and thermal coupling characteristics should be evaluated for compatibility with existing mechanical designs.

Frequently Asked Questions (FAQ)

Q: Can the FP07DB204N directly replace the GS204R1K in all applications?

A: Direct replacement is possible only when the application's maximum operating temperature does not exceed 200°C. The GS204R1K supports 300°C operation, while the FP07DB204N is limited to 200°C. Verify thermal requirements before substitution.

Q: What is the impact of the different resistance tolerances?

A: The GS204R1K specifies ±10% tolerance while the FP07DB204N specifies ±25%. Applications requiring precise temperature measurement within narrow tolerance bands may experience reduced accuracy with the substitute part. Calibration procedures should be reviewed.

Q: Are the physical dimensions compatible?

A: Both components use through-hole mounting, but the package geometry differs. The GS204R1K is a glass bead while the FP07DB204N is a cylindrical probe. PCB footprint and thermal contact surface area may differ, requiring mechanical design verification.

Q: What compliance certifications apply to the FP07DB204N?

A: The FP07DB204N is RoHS Compliant and classified as ECCN EAR99. Both components share the same HTSUS classification (8533.40.8070).

Q: Is the FP07DB204N currently available?

A: Yes, the FP07DB204N is classified as an active product with documented inventory availability, providing reliable supply chain access compared to the obsolete GS204R1K.