ERJ-S14F2491U Equivalent & Substitute Parts

Part Overview

The ERJ-S14F2491U is a 2.49 kOhms ±1% 0.5W thick film chip resistor in 1210 (3225 Metric) package manufactured by Panasonic Electronic Components. This part features anti-sulfur coating and automotive AEC-Q200 qualification, designed for automotive and industrial applications requiring high reliability in harsh environments. The part is currently in active production status with 1039 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when design requirements shift to alternative manufacturers, or when specific feature enhancements (such as pulse withstanding capability or moisture resistance) are required for application optimization.

Substiute Parts

ERJ-S14F2491U

Panasonic Electronic ComponentsIn Stock: 1106ERJ-S14F2491U Datasheet

Current PartRFQ

ERJ-14NF2491U

Panasonic Electronic ComponentsIn Stock: 44251ERJ-14NF2491U Datasheet

SimilarRFQ

ERJ-P14F2491U

Panasonic Electronic ComponentsIn Stock: 5146ERJ-P14F2491U Datasheet

SimilarRFQ

AC1210FR-072K49L

YAGEOIn Stock: 8463AC1210FR-072K49L Datasheet

SimilarRFQ

CRCW12102K49FKEA

Vishay DaleIn Stock: 45368CRCW12102K49FKEA Datasheet

SimilarRFQ

RC1210FR-072K49L

YAGEOIn Stock: 5882RC1210FR-072K49L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ERJ-S14F2491U is determined by strict equivalence across the following parameters:

• Resistance value: 2.49 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Package: 1210 (3225 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)
• Moisture sensitivity: MSL 1 (exact match required)

All identified substitute parts meet these core electrical and mechanical parameters. Variations in secondary features (such as anti-sulfur coating, pulse withstanding capability, or moisture resistance) represent functional enhancements rather than substitution barriers, as these features are additive to the base specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full AEC-Q200 Compliance):

ERJ-P14F2491U (Panasonic) and AC1210FR-072K49L (YAGEO) are preferred substitutes for new designs. Both parts maintain active production status and full AEC-Q200 automotive qualification. ERJ-P14F2491U adds pulse withstanding capability as an enhanced feature. AC1210FR-072K49L includes moisture resistance enhancement. CRCW12102K49FKEA (Vishay Dale) is also active with full compliance and represents the highest inventory availability at 45,306 units.

Secondary Substitute (Legacy Status):

ERJ-14NF2491U (Panasonic) is marked "Not For New Designs" and should be used only for legacy system maintenance or when existing design documentation explicitly specifies this part number. Despite this status, it maintains full electrical and mechanical equivalence with 44,175 units available.

Conditional Substitute (Non-Automotive Rated):

RC1210FR-072K49L (YAGEO) does not carry AEC-Q200 automotive qualification. This part is suitable only for non-automotive applications or where automotive qualification is not a design requirement. It maintains all other electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can ERJ-P14F2491U replace ERJ-S14F2491U directly?

A: Yes. Both parts share identical resistance (2.49 kΩ), tolerance (±1%), power rating (0.5W), package (1210), temperature coefficient (±100ppm/°C), operating range (-55°C to 155°C), and AEC-Q200 qualification. ERJ-P14F2491U adds pulse withstanding capability as an additional feature that does not affect substitution compatibility.

Q: Why is ERJ-14NF2491U marked "Not For New Designs"?

A: This designation indicates the part is in legacy or end-of-life status within Panasonic's product portfolio. While electrically and mechanically equivalent, it should not be selected for new circuit designs. Use this part only for maintenance of existing systems where the original part number is specified.

Q: What is the difference between AC1210FR-072K49L and RC1210FR-072K49L?

A: Both are YAGEO 1210 package 2.49 kΩ resistors with ±1% tolerance. AC1210FR-072K49L carries AEC-Q200 automotive qualification and moisture resistance. RC1210FR-072K49L includes moisture resistance but lacks AEC-Q200 qualification. For automotive applications, AC1210FR-072K49L is the correct choice.

Q: Are there physical dimension differences between these parts?

A: Minor variations exist. ERJ-S14F2491U, ERJ-14NF2491U, ERJ-P14F2491U, and CRCW12102K49FKEA share dimensions of 0.126" L × 0.098" W (3.20mm × 2.50mm). AC1210FR-072K49L and RC1210FR-072K49L measure 0.122" L × 0.102" W (3.10mm × 2.60mm). Height differences range from 0.024" to 0.028" seated maximum. These variations are within standard 1210 package tolerance and do not affect PCB footprint compatibility.

Q: Which substitute has the best inventory availability?

A: CRCW12102K49FKEA (Vishay Dale) has the highest inventory at 45,306 units. For Panasonic parts, ERJ-14NF2491U offers 44,175 units despite legacy status. If active production status is required, CRCW12102K49FKEA remains the optimal choice for supply chain continuity.

Q: Can RC1210FR-072K49L be used in automotive applications?

A: RC1210FR-072K49L lacks AEC-Q200 automotive qualification and should not be used in automotive applications where this certification is required. Use AC1210FR-072K49L or other AEC-Q200 qualified alternatives for automotive designs.