Equivalent & Substitute Parts for ERJ-S14F6491U

Part Overview

The ERJ-S14F6491U is a 6.49 kOhms ±1% thick film chip resistor manufactured by Panasonic Electronic Components in the 1210 (3225 Metric) package format. This component is rated for 0.5W power dissipation and meets AEC-Q200 automotive qualification standards with anti-sulfur protection. The part is currently in active production status with 879 units available in stock.

Equivalent and substitute parts are identified when design requirements change, inventory constraints occur, or when transitioning from legacy components to current production lines. The ERJ-S14F6491U has established substitutes that maintain identical electrical specifications and mechanical compatibility.

Substiute Parts

ERJ-S14F6491U

Panasonic Electronic ComponentsIn Stock: 955ERJ-S14F6491U Datasheet

Current PartRFQ

ERJ-14NF6491U

Panasonic Electronic ComponentsIn Stock: 15611ERJ-14NF6491U Datasheet

SimilarRFQ

CRCW12106K49FKEA

Vishay DaleIn Stock: 3858CRCW12106K49FKEA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ERJ-S14F6491U is determined by strict equivalence across the following parameters:

• Resistance value: 6.49 kOhms
• Tolerance: ±1%
• Power rating: 0.5W
• Package format: 1210 (3225 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Automotive qualification: AEC-Q200
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL 1

All identified substitutes meet these criteria without exception. Substitution is valid across manufacturers when all parameters align with the specifications above.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: ERJ-S14F6491U

The ERJ-S14F6491U maintains active production status and includes anti-sulfur protection, making it the preferred choice for new designs and ongoing production. This part is currently in stock with 879 units available.

Active Alternative: CRCW12106K49FKEA

The CRCW12106K49FKEA from Vishay Dale is an active production substitute with full electrical and mechanical equivalence. This part is suitable for new designs and offers 3,763 units in current inventory. The seated height is 0.024" (0.60mm) compared to 0.028" (0.70mm) for the Panasonic ERJ-S14F6491U, which may be relevant for applications with height constraints.

Legacy Alternative: ERJ-14NF6491U

The ERJ-14NF6491U is electrically and mechanically equivalent but carries a "Not For New Designs" status. This part is available in high inventory (15,503 units) and may be used only for legacy system maintenance or existing production lines where design changes are not feasible.

Frequently Asked Questions (FAQ)

Q: Can CRCW12106K49FKEA be used as a direct replacement for ERJ-S14F6491U?

A: Yes. Both parts meet identical electrical specifications (6.49 kOhms ±1%, 0.5W, ±100ppm/°C, -55°C ~ 155°C) and are packaged in 1210 (3225 Metric) format with AEC-Q200 automotive qualification. The CRCW12106K49FKEA has a slightly lower seated height (0.024" vs 0.028"), which is compatible with standard PCB layouts.

Q: Why is ERJ-14NF6491U marked "Not For New Designs"?

A: The ERJ-14NF6491U is a legacy series component. Panasonic has transitioned to the ERJ-S14 series for new production. The ERJ-14NF6491U remains available for maintenance of existing systems but should not be specified for new circuit designs.

Q: Are all three parts interchangeable in automotive applications?

A: Yes. All three parts carry AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 moisture sensitivity rating. They are electrically and mechanically interchangeable for automotive circuit applications.

Q: What is the significance of anti-sulfur protection in the ERJ-S14F6491U?

A: Anti-sulfur protection is a material enhancement that prevents sulfur-induced corrosion of the resistor element. This feature is specified in the ERJ-S14F6491U but not explicitly listed for the other substitutes. For applications in high-sulfur environments, the ERJ-S14F6491U is the specified choice.

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

A: Yes. All three parts use identical 1210 (3225 Metric) package footprints and are supplied in Tape & Reel (TR) packaging suitable for automated assembly. The minor height difference in the CRCW12106K49FKEA (0.024" vs 0.028") does not affect standard PCB assembly processes.