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ERJ-S1TJ391U Equivalent & Substitute Parts
Part Overview
The ERJ-S1TJ391U is a 390 Ohm ±5% 1W thick film chip resistor in 2512 (6432 Metric) package manufactured by Panasonic Electronic Components. This part is actively produced and features anti-sulfur coating with automotive AEC-Q200 qualification, making it suitable for demanding automotive and industrial applications. Equivalent and substitute parts are identified based on matching electrical specifications, package dimensions, and compliance ratings to ensure functional interchangeability in circuit designs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 390 Ohms |
| Tolerance | ±5% |
| Power Rating | 1W |
| Composition | Thick Film |
| Package / Case | 2512 (6432 Metric) |
| Temperature Coefficient | ±200ppm/°C |
| Operating Temperature Range | -55°C ~ 155°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the ERJ-S1TJ391U are qualified based on the following criteria:
Electrical Parameters: Resistance value (390 Ohms), tolerance (±5%), power rating (1W), and temperature coefficient (±200ppm/°C) must match exactly.
Package Specifications: All substitutes use the 2512 (6432 Metric) package with 2 terminations. Dimensional variations within supplier tolerances (length 0.248"–0.252", width 0.122"–0.126", height ≤0.030") are acceptable.
Environmental & Compliance: All substitutes maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status. Automotive AEC-Q200 qualification is present in most substitutes, ensuring suitability for automotive applications.
Operating Temperature: The main part operates -55°C to 155°C. Substitute 3520390RJT operates -55°C to 125°C, which is acceptable for most applications but has a narrower upper temperature limit.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Package | Temp Coeff | Operating Temp | AEC-Q200 | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| ERJ-S1TJ391U | Panasonic Electronic Components | 390 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | Yes | Active |
| ERJ-1TYJ391U | Panasonic Electronic Components | 390 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | Yes | Not For New Designs |
| 3520390RJT | TE Connectivity Passive Product | 390 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 125°C | No | Active |
| CR2512-JW-391ELF | Bourns Inc. | 390 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | No | Active |
| CRCW2512390RJNEG | Vishay Dale | 390 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | Yes | Active |
| RMCF2512JT390R | Stackpole Electronics Inc | 390 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | Yes | Active |
Engineering Selection Recommendations
Primary Substitutes (Recommended for New Designs):
CRCW2512390RJNEG (Vishay Dale) and RMCF2512JT390R (Stackpole Electronics Inc) are the preferred alternatives. Both are actively produced, carry AEC-Q200 automotive qualification, and maintain the full -55°C to 155°C operating temperature range. These parts provide direct functional equivalence with established supply chain availability.
Secondary Substitutes (Active Production):
CR2512-JW-391ELF (Bourns Inc.) is actively produced with matching electrical and thermal specifications across the full temperature range. While not AEC-Q200 qualified, it remains suitable for non-automotive applications requiring equivalent performance.
3520390RJT (TE Connectivity Passive Product) is actively produced but operates only to 125°C maximum, making it unsuitable for applications requiring the full 155°C upper temperature limit of the main part.
Legacy Substitute (Not Recommended for New Designs):
ERJ-1TYJ391U (Panasonic Electronic Components) is marked "Not For New Designs" and should be avoided in new circuit development, despite matching all electrical and thermal parameters.
Frequently Asked Questions (FAQ)
Q: Can I use 3520390RJT as a direct replacement for ERJ-S1TJ391U?
A: 3520390RJT is electrically equivalent but has a maximum operating temperature of 125°C versus 155°C for the ERJ-S1TJ391U. Use only if your application does not require operation above 125°C.
Q: What is the difference between AEC-Q200 qualified and non-qualified substitutes?
A: AEC-Q200 qualification indicates automotive-grade reliability testing and is required for automotive applications. CRCW2512390RJNEG and RMCF2512JT390R carry this certification; CR2512-JW-391ELF does not. For automotive use, select AEC-Q200 qualified parts.
Q: Are all substitutes available in the same packaging format?
A: Yes, all listed substitutes use Tape & Reel (TR) packaging in the 2512 (6432 Metric) case. Minor dimensional variations exist within supplier tolerances but do not affect PCB assembly compatibility.
Q: Why is ERJ-1TYJ391U marked "Not For New Designs"?
A: This designation indicates the part is in legacy status. While functionally equivalent, Panasonic recommends using ERJ-S1TJ391U for new designs. Existing designs using ERJ-1TYJ391U may continue operation without change.
Q: Which substitute offers the best supply availability?
A: RMCF2512JT390R (Stackpole Electronics Inc) shows the highest inventory level at 42,076 pieces, followed by ERJ-1TYJ391U at 8,504 pieces and 3520390RJT at 109,625 pieces. Verify current availability with your supplier for production requirements.
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