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ERJ-S1TJ221U Equivalent & Substitute Parts
Part Overview
The ERJ-S1TJ221U is a 220 Ohm ±5% 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 part is currently active in production with 1183 pieces in stock.
Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements shift between production runs, or when supply chain optimization requires sourcing from multiple qualified manufacturers while maintaining identical electrical and mechanical performance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 220 Ohms |
| Tolerance | ±5% |
| Power Rating | 1W |
| Package / Case | 2512 (6432 Metric) |
| Composition | Thick Film |
| Temperature Coefficient | ±200ppm/°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-S1TJ221U is determined by strict equivalence across the following parameters:
- Resistance value: 220 Ohms
- Tolerance: ±5%
- Power rating: 1W minimum
- Package: 2512 (6432 Metric)
- Composition: Thick Film
- Temperature coefficient: ±200ppm/°C
- Operating temperature range: -55°C to 155°C minimum
- RoHS3 compliance
- MSL rating: 1 (Unlimited)
Parts meeting all these criteria are classified as direct equivalents. Parts with enhanced specifications (such as higher power ratings or additional features like pulse withstanding capability) are classified as compatible upgrades. Parts with different product status or missing automotive qualification are noted for reference but require design review before substitution.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Package | Temp Coeff | Op Temp Range | AEC-Q200 | Product Status | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|---|---|---|
| ERJ-S1TJ221U | Panasonic | 220 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | Yes | Active | 1183 |
| ERJ-1TYJ221U | Panasonic | 220 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | Yes | Not For New Designs | 48711 |
| 3520220RJT | TE Connectivity | 220 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 125°C | No | Active | 24541 |
| CR2512-JW-221ELF | Bourns Inc. | 220 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | No | Active | 23003 |
| CRCW2512220RJNEG | Vishay Dale | 220 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | Yes | Active | 8400 |
| CRCW2512220RJNEGHP | Vishay Dale | 220 Ω | ±5% | 1.5 | 2512 | ±200ppm/°C | -55°C ~ 155°C | Yes | Active | 8383 |
| RMCF2512JT220R | Stackpole Electronics | 220 Ω | ±5% | 1 | 2512 | ±200ppm/°C | -55°C ~ 155°C | Yes | Active | 17822 |
Engineering Selection Recommendations
Direct Equivalents (Recommended for Substitution)
CRCW2512220RJNEG (Vishay Dale) and RMCF2512JT220R (Stackpole Electronics) are direct functional equivalents to the ERJ-S1TJ221U. Both parts maintain identical electrical specifications, package dimensions, operating temperature range (-55°C to 155°C), and automotive AEC-Q200 qualification. Both are active products with established supply availability.
Compatible Upgrade
CRCW2512220RJNEGHP (Vishay Dale) provides enhanced performance with 1.5W power rating and pulse withstanding capability while maintaining all other specifications of the primary part. This part is suitable for applications requiring additional thermal margin or transient pulse immunity.
Conditional Equivalents
CR2512-JW-221ELF (Bourns Inc.) matches all electrical and mechanical specifications and maintains the full -55°C to 155°C operating range. However, this part lacks automotive AEC-Q200 certification. Use only in non-automotive applications or where automotive qualification is not a design requirement.
3520220RJT (TE Connectivity) provides electrical equivalence but operates to -55°C to 125°C maximum, reducing the upper temperature capability by 30°C compared to the primary part. This part also lacks automotive AEC-Q200 certification. Use only when the reduced temperature range is acceptable for the application.
Legacy Part
ERJ-1TYJ221U (Panasonic) is electrically and mechanically equivalent with automotive AEC-Q200 qualification but carries "Not For New Designs" status. This part is suitable only for sustaining production of existing designs or field service applications.
Frequently Asked Questions (FAQ)
Q: Can I substitute ERJ-S1TJ221U with any 220 Ohm 1W resistor?
A: No. Substitution requires matching all specified parameters: 220 Ohm resistance, ±5% tolerance, 1W power rating, 2512 package, thick film composition, ±200ppm/°C temperature coefficient, -55°C to 155°C operating range, and ROHS3 compliance. Additionally, automotive applications require AEC-Q200 certification.
Q: What is the difference between ERJ-S1TJ221U and ERJ-1TYJ221U?
A: Both parts are electrically and mechanically identical with matching specifications and automotive AEC-Q200 qualification. The primary difference is product status: ERJ-S1TJ221U is active for new designs, while ERJ-1TYJ221U is marked "Not For New Designs" and should be used only for sustaining existing production.
Q: Can I use CRCW2512220RJNEGHP as a direct replacement?
A: Yes, CRCW2512220RJNEGHP is a compatible upgrade. It maintains all electrical specifications and operating parameters of the primary part while providing enhanced 1.5W power rating and pulse withstanding capability. No circuit redesign is required.
Q: Why does 3520220RJT have a lower maximum operating temperature?
A: The 3520220RJT is specified to -55°C to 125°C, which is 30°C lower than the ERJ-S1TJ221U (-55°C to 155°C). This difference reflects the thermal design of the TE Connectivity part. Substitution is acceptable only if your application does not require operation above 125°C.
Q: Is automotive AEC-Q200 certification required for my application?
A: AEC-Q200 certification is mandatory for automotive applications and strongly recommended for industrial applications requiring high reliability. If your design is for automotive use, select only from parts carrying AEC-Q200 qualification: ERJ-S1TJ221U, ERJ-1TYJ221U, CRCW2512220RJNEG, CRCW2512220RJNEGHP, or RMCF2512JT220R.
Q: What is the physical size difference between these parts?
A: All parts use the 2512 (6432 Metric) package with nominal dimensions of 6.30-6.40mm length and 3.10-3.20mm width. Height varies slightly: ERJ-S1TJ221U and most equivalents are 0.70mm maximum, while CR2512-JW-221ELF is 0.75mm maximum. These variations are within standard PCB assembly tolerances and do not affect interchangeability.
Q: Can I mix different manufacturers in the same production run?
A: Yes. All recommended direct equivalents and compatible upgrades are electrically and mechanically interchangeable. However, maintain consistent sourcing within a single production batch to ensure uniform performance characteristics and traceability.
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