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Equivalent & Substitute Parts for ERG-1SJ272
Part Overview
The ERG-1SJ272 is a 2.7 kOhms ±5% 1W through-hole resistor with axial leads, manufactured by Panasonic Electronic Components. This metal oxide film resistor features flame-proof and safety characteristics suitable for industrial and consumer applications. The part is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 2.7 kOhms |
| Tolerance | ±5% |
| Power Rating | 1W |
| Composition | Metal Oxide Film |
| Package Type | Axial |
| Features | Flame Proof, Safety |
| Operating Temperature Range | -55°C ~ 235°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the ERG-1SJ272 is based on the following critical parameters:
- Resistance Value: 2.7 kOhms (exact match required)
- Tolerance: ±5% (electrical accuracy specification)
- Power Rating: 1W (thermal dissipation capability)
- Composition: Metal Oxide Film (material and performance characteristics)
- Package Type: Axial (mechanical form factor and lead configuration)
- Features: Flame Proof and Safety ratings (regulatory and safety compliance)
- Compliance: ROHS3 Compliant (environmental and regulatory requirement)
The RSMF1JT2K70 manufactured by Stackpole Electronics Inc meets all critical substitution criteria. Both parts share identical resistance, tolerance, power rating, composition, and package type. Both are ROHS3 compliant and feature flame-proof and safety characteristics.
Parameter Comparison
| Parameter | ERG-1SJ272 (Panasonic) | RSMF1JT2K70 (Stackpole) | Match Status |
|---|---|---|---|
| Resistance | 2.7 kOhms | 2.7 kOhms | Exact Match |
| Tolerance | ±5% | ±5% | Exact Match |
| Power Rating | 1W | 1W | Exact Match |
| Composition | Metal Oxide Film | Metal Oxide Film | Exact Match |
| Package Type | Axial | Axial | Exact Match |
| Features | Flame Proof, Safety | Flame Proof, Safety | Exact Match |
| Temperature Coefficient | ±350ppm/°C | ±200ppm/°C | Stackpole Superior |
| Operating Temperature Range | -55°C ~ 235°C | -55°C ~ 200°C | Panasonic Extended |
| Size / Dimension | 0.110" Dia x 0.354" L (2.80mm x 9.00mm) | 0.126" Dia x 0.354" L (3.20mm x 9.00mm) | Minor Variation |
| Product Status | Obsolete | Active | Stackpole Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Exact Match |
| Packaging | Bulk | Tape & Reel (TR) | Different Format |
Engineering Selection Recommendations
The RSMF1JT2K70 is a direct functional equivalent to the ERG-1SJ272 for applications requiring a 2.7 kOhms ±5% 1W metal oxide film axial resistor. Both parts maintain ROHS3 compliance and identical electrical specifications for resistance, tolerance, and power rating.
The RSMF1JT2K70 offers improved temperature coefficient performance (±200ppm/°C versus ±350ppm/°C), resulting in superior stability across temperature variations. The Stackpole part operates within -55°C to 200°C, which covers the majority of industrial and consumer applications. Applications requiring operation above 200°C up to 235°C would require retention of the original Panasonic specification or alternative sourcing.
The RSMF1JT2K70 is currently in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete ERG-1SJ272. Physical dimensions show minor variation in diameter (3.20mm versus 2.80mm), which may require PCB layout verification for space-constrained applications.
Frequently Asked Questions (FAQ)
Q: Can RSMF1JT2K70 be used as a direct replacement for ERG-1SJ272?
A: Yes. Both parts share identical resistance (2.7 kOhms), tolerance (±5%), power rating (1W), composition (metal oxide film), package type (axial), and safety features (flame proof, safety rated). Both are ROHS3 compliant.
Q: What are the differences between these parts?
A: The RSMF1JT2K70 has a superior temperature coefficient (±200ppm/°C versus ±350ppm/°C) and operates to 200°C maximum versus 235°C for the ERG-1SJ272. The Stackpole part has a slightly larger diameter (3.20mm versus 2.80mm). The RSMF1JT2K70 is supplied in Tape & Reel format while the ERG-1SJ272 was supplied in bulk packaging.
Q: Are there any PCB layout considerations?
A: The RSMF1JT2K70 has a larger diameter (3.20mm versus 2.80mm). Verify that PCB pad spacing and component clearances accommodate the slightly larger body diameter. Axial lead length remains identical at 0.354" (9.00mm).
Q: What is the temperature operating range difference?
A: The ERG-1SJ272 operates from -55°C to 235°C. The RSMF1JT2K70 operates from -55°C to 200°C. For applications requiring operation above 200°C, the original Panasonic specification must be retained or alternative parts sourced.
Q: Is the RSMF1JT2K70 currently available?
A: Yes. The RSMF1JT2K70 is in active production status, ensuring availability and supply chain continuity. The ERG-1SJ272 is obsolete and subject to limited availability.
Q: Do both parts meet the same compliance standards?
A: Yes. Both the ERG-1SJ272 and RSMF1JT2K70 are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8533.21.0090.
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