ERJ-S1TF3921U Equivalent & Substitute Parts

Part Overview

The ERJ-S1TF3921U is a 3.92 kOhms ±1% 1W thick film chip resistor manufactured by Panasonic Electronic Components in the 2512 (6432 Metric) package. This component is designed for automotive applications and carries AEC-Q200 qualification with anti-sulfur protection. The part is currently in active production status with 855 units available in stock. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and automotive compliance ratings are maintained across alternative manufacturers.

Substiute Parts

ERJ-S1TF3921U

Panasonic Electronic ComponentsIn Stock: 938ERJ-S1TF3921U Datasheet

Current PartRFQ

CRCW25123K92FKEG

Vishay DaleIn Stock: 2499CRCW25123K92FKEG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ERJ-S1TF3921U is determined by strict equivalence across the following parameters: resistance value (3.92 kOhms), tolerance (±1%), power rating (1W), package type (2512), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and automotive qualification (AEC-Q200). All substitute parts must maintain ROHS3 compliance and MSL 1 rating. Dimensional variations within supplier specifications are acceptable provided the package designation remains 2512 (6432 Metric).

Parameter Comparison

Engineering Selection Recommendations

The CRCW25123K92FKEG from Vishay Dale is a direct electrical and mechanical equivalent to the ERJ-S1TF3921U. Both components satisfy identical electrical specifications, maintain AEC-Q200 automotive qualification, and comply with ROHS3 and REACH requirements. Dimensional differences are within acceptable tolerances for 2512 package footprints. Selection between these parts may be based on availability, supply chain considerations, or established procurement preferences, as both components meet all specified engineering requirements for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can the CRCW25123K92FKEG replace the ERJ-S1TF3921U in automotive applications?

A: Yes. Both components are AEC-Q200 qualified with identical electrical specifications (3.92 kOhms ±1%, 1W, ±100ppm/°C) and operate across the same temperature range (-55°C ~ 155°C). The 2512 package dimensions are equivalent within supplier tolerances.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist within the 2512 package specification. The ERJ-S1TF3921U measures 0.252" L × 0.126" W (6.40mm × 3.20mm), while the CRCW25123K92FKEG measures 0.248" L × 0.124" W (6.30mm × 3.15mm). Both maintain the same maximum seated height of 0.028" (0.70mm) and are compatible with standard 2512 footprints.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the ERJ-S1TF3921U and CRCW25123K92FKEG are ROHS3 compliant, REACH unaffected, carry MSL 1 (unlimited) moisture sensitivity rating, and hold AEC-Q200 automotive qualification.

Q: What is the difference between the anti-sulfur feature on the Panasonic part?

A: The ERJ-S1TF3921U includes anti-sulfur protection as a specified feature. The CRCW25123K92FKEG does not list this feature in the provided specifications. If anti-sulfur protection is a design requirement, the ERJ-S1TF3921U should be selected.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, for standard 2512 footprints. The minor dimensional differences fall within typical PCB design tolerances. Verify footprint compatibility with your specific PCB layout requirements.