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ERJ-S14F4301U Equivalent & Substitute Parts
Part Overview
The ERJ-S14F4301U is a 4.3 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 is designed for automotive applications with AEC-Q200 qualification and anti-sulfur protection. The part is currently in active production status.
Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit alternative qualified sources. The ERJ-S14F4301U has documented equivalent parts that maintain electrical and mechanical compatibility within the same package class.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 4.3 kOhms |
| Tolerance | ±1% |
| Power Rating | 0.5W (1/2W) |
| Package / Case | 1210 (3225 Metric) |
| Composition | Thick Film |
| Temperature Coefficient | ±100ppm/°C |
| Operating Temperature Range | -55°C ~ 155°C |
| Terminations | 2 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the ERJ-S14F4301U is determined by strict equivalence across the following parameters:
- Resistance value: 4.3 kOhms
- Tolerance: ±1%
- Power rating: 0.5W (1/2W)
- Package: 1210 (3225 Metric)
- Composition: Thick Film
- Temperature coefficient: ±100ppm/°C
- Operating temperature range: -55°C ~ 155°C
- Number of terminations: 2
- RoHS compliance: ROHS3 Compliant
- Moisture sensitivity level: 1 (Unlimited)
All identified substitute parts meet these core electrical and mechanical specifications. Variations in packaging format (Tape & Reel versus Cut Tape), product status, and optional features (such as anti-sulfur or automotive ratings) do not affect functional interchangeability within the specified parameter set.
Parameter Comparison
| Parameter | ERJ-S14F4301U (Panasonic) | ERJ-14NF4301U (Panasonic) | RC1210FR-074K3L (YAGEO) |
|---|---|---|---|
| Resistance | 4.3 kOhms | 4.3 kOhms | 4.3 kOhms |
| Tolerance | ±1% | ±1% | ±1% |
| Power Rating | 0.5W | 0.5W | 0.5W |
| Package / Case | 1210 (3225 Metric) | 1210 (3225 Metric) | 1210 (3225 Metric) |
| Composition | Thick Film | Thick Film | Thick Film |
| Temperature Coefficient | ±100ppm/°C | ±100ppm/°C | ±100ppm/°C |
| Operating Temperature | -55°C ~ 155°C | -55°C ~ 155°C | -55°C ~ 155°C |
| Terminations | 2 | 2 | 2 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Not For New Designs | Active |
| Packaging Format | Tape & Reel (TR) | Cut Tape (CT) | Tape & Reel (TR) |
Engineering Selection Recommendations
The ERJ-S14F4301U remains the primary selection for new designs due to its active product status and anti-sulfur feature set optimized for automotive environments.
The ERJ-14NF4301U is electrically and mechanically equivalent but carries a "Not For New Designs" status. This part is suitable only for legacy system maintenance, repair, or continuation of existing production where design changes are not permitted.
The RC1210FR-074K3L manufactured by YAGEO is an active product with full electrical and mechanical equivalence. This part is suitable for new designs and provides an alternative source when Panasonic supply is constrained. The RC1210FR-074K3L features moisture-resistant construction and maintains all required compliance certifications.
Frequently Asked Questions (FAQ)
Q: Can ERJ-14NF4301U be used in new product designs?
A: No. The ERJ-14NF4301U carries a "Not For New Designs" status and is restricted to legacy applications and repair scenarios only.
Q: What is the difference between Tape & Reel and Cut Tape packaging?
A: Tape & Reel (TR) packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly. Cut Tape (CT) packaging is supplied as individual segments cut from the carrier tape, typically for manual assembly or lower-volume applications. Both formats contain electrically and mechanically identical components.
Q: Are dimensional variations between ERJ-S14F4301U and RC1210FR-074K3L significant?
A: Both parts conform to the 1210 (3225 Metric) package specification. Minor dimensional variations (length 0.126" vs 0.122", width 0.098" vs 0.102", height 0.028" vs 0.024") fall within standard package tolerances and do not affect PCB footprint compatibility or functional performance.
Q: Does the absence of anti-sulfur specification on RC1210FR-074K3L affect automotive suitability?
A: The RC1210FR-074K3L is specified as moisture-resistant thick film construction. Substitution suitability depends on specific application requirements. If anti-sulfur protection is a mandatory design requirement, the ERJ-S14F4301U or equivalent Panasonic automotive-rated parts are required.
Q: Are all three parts RoHS compliant?
A: Yes. All three parts are ROHS3 compliant and meet REACH requirements.
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