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ERJ-S1TF3900U Equivalent & Substitute Parts
Part Overview
The ERJ-S1TF3900U is a 390 Ohms ±1% 1W thick film chip resistor in 2512 (6432 Metric) package manufactured by Panasonic Electronic Components. This part features anti-sulfur coating and automotive AEC-Q200 qualification, designed for high-reliability applications in automotive and industrial environments. The product is currently active and widely available. Substitute parts are necessary when the primary part experiences supply constraints, when design requirements allow for alternative manufacturers, or when enhanced performance characteristics such as higher power ratings or additional protective features are beneficial.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 390 Ohms |
| Tolerance | ±1% |
| Power Rating | 1W |
| Package / Case | 2512 (6432 Metric) |
| Composition | Thick Film |
| Temperature Coefficient | ±100ppm/°C |
| Operating Temperature Range | -55°C ~ 155°C |
| Automotive Rating | AEC-Q200 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the ERJ-S1TF3900U is determined by the following critical parameters: resistance value (390 Ohms), tolerance (±1%), package type (2512), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C ~ 155°C), and compliance certifications (AEC-Q200, ROHS3). Power rating may vary within acceptable limits for the application. All identified substitute parts meet these core electrical and mechanical requirements, ensuring functional equivalence in standard circuit applications. Dimensional variations within the 2512 package specification are acceptable per industry standards.
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Package | Temp Coeff | Op. Temp Range | AEC-Q200 | RoHS3 | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|
| ERJ-S1TF3900U | Panasonic | 390 Ω | ±1% | 1 | 2512 | ±100ppm/°C | -55°C ~ 155°C | Yes | Yes | Active |
| ERJ-1TNF3900U | Panasonic | 390 Ω | ±1% | 1 | 2512 | ±100ppm/°C | -55°C ~ 155°C | Yes | Yes | Not For New Designs |
| AC2512FK-07390RL | YAGEO | 390 Ω | ±1% | 1 | 2512 | ±100ppm/°C | -55°C ~ 155°C | Yes | Yes | Active |
| CRCW2512390RFKEGHP | Vishay Dale | 390 Ω | ±1% | 1.5 | 2512 | ±100ppm/°C | -55°C ~ 155°C | Yes | Yes | Active |
| RC2512FK-07390RL | YAGEO | 390 Ω | ±1% | 1 | 2512 | ±100ppm/°C | -55°C ~ 155°C | No | Yes | Active |
| RMCF2512FT390R | Stackpole Electronics Inc | 390 Ω | ±1% | 1 | 2512 | ±100ppm/°C | -55°C ~ 155°C | Yes | Yes | Active |
Engineering Selection Recommendations
For new designs, select from parts with Active product status: AC2512FK-07390RL (YAGEO), CRCW2512390RFKEGHP (Vishay Dale), RC2512FK-07390RL (YAGEO), or RMCF2512FT390R (Stackpole Electronics Inc). All active substitutes are ROHS3 compliant and support the full operating temperature range.
For automotive applications requiring AEC-Q200 certification, the following parts are qualified: AC2512FK-07390RL, CRCW2512390RFKEGHP, and RMCF2512FT390R. The CRCW2512390RFKEGHP offers enhanced pulse withstanding capability with 1.5W power rating, providing additional design margin in high-stress applications.
The ERJ-1TNF3900U (Panasonic) is functionally equivalent but marked Not For New Designs and should be used only for legacy system maintenance or repair applications.
The RC2512FK-07390RL lacks AEC-Q200 certification and is suitable only for non-automotive applications where automotive qualification is not required.
Frequently Asked Questions (FAQ)
Q: Can ERJ-S1TF3900U be replaced with ERJ-1TNF3900U? A: Yes, both parts are electrically and mechanically identical with matching resistance, tolerance, power rating, and package specifications. However, ERJ-1TNF3900U is marked Not For New Designs. Use only for legacy system support.
Q: Is CRCW2512390RFKEGHP a direct substitute despite the 1.5W rating? A: Yes. The 1.5W rating is a superset of the 1W requirement and provides additional thermal margin. All other electrical parameters, package dimensions, and certifications are equivalent. This part is suitable for applications requiring enhanced reliability.
Q: Can RC2512FK-07390RL be used in automotive applications? A: No. RC2512FK-07390RL lacks AEC-Q200 certification and is not qualified for automotive use. Use only in consumer or industrial applications where automotive qualification is not mandated.
Q: Are there dimensional differences between substitute parts? A: Minor dimensional variations exist within the 2512 package specification. AC2512FK-07390RL and RC2512FK-07390RL measure 0.250" L x 0.122" W with 0.026" max height. ERJ-S1TF3900U, CRCW2512390RFKEGHP, and RMCF2512FT390R measure 0.248"–0.252" L x 0.124"–0.126" W with 0.028" max height. These variations are within standard PCB layout tolerances.
Q: Which substitute offers the best availability? A: RMCF2512FT390R (Stackpole) has the highest inventory at 24,983 pieces. AC2512FK-07390RL (YAGEO) has 5,423 pieces, and CRCW2512390RFKEGHP (Vishay Dale) has 4,258 pieces.
Q: Do all substitutes support the same temperature range? A: Yes. All substitute parts operate across -55°C to 155°C, matching the ERJ-S1TF3900U specification.
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