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ERG-3SJ821 Equivalent & Substitute Parts
Part Overview
The ERG-3SJ821 is an 820 Ohms ±5% 3W axial through-hole resistor manufactured by Panasonic Electronic Components. This metal oxide film resistor features flame-proof and safety characteristics with a temperature coefficient of ±300ppm/°C and operating range of -55°C to 235°C. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 820 Ohms |
| Tolerance | ±5% |
| Power Rating | 3W |
| Composition | Metal Oxide Film |
| Package Type | Axial |
| Temperature Coefficient | ±300ppm/°C |
| Operating Temperature Range | -55°C to 235°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the ERG-3SJ821 is determined by the following core parameters: resistance value (820 Ohms), tolerance (±5%), power rating (3W), composition (metal oxide film), and axial package configuration. All substitute parts must maintain these electrical specifications and physical form factor.
Substitute parts are grouped into three categories based on their relationship to the original part:
Direct Manufacturer Substitutes maintain identical electrical performance and are sourced from active manufacturers. These parts are fully interchangeable with the ERG-3SJ821 in all applications.
Upgrade Substitutes offer equivalent or improved performance characteristics while maintaining core electrical parameters. These parts may feature enhanced temperature coefficients or extended availability through active product lines.
Similar Substitutes meet the core electrical and mechanical requirements but may include minor variations in physical dimensions, temperature coefficients, or feature sets. These parts are suitable for applications where the ERG-3SJ821 specifications are met.
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Temp Coeff (ppm/°C) | Operating Temp (°C) | Size (mm) | Product Status | Packaging |
|---|---|---|---|---|---|---|---|---|---|
| ERG-3SJ821 | Panasonic Electronic Components | 820 Ω | ±5% | 3 | ±300 | -55 to 235 | 5.50 x 15.00 | Obsolete | Axial |
| RSS3W820RJTB | TE Connectivity Passive Product | 820 Ω | ±5% | 3 | ±300 | -55 to 155 | 5.00 x 15.00 | Active | Tape & Box |
| RSMF3JB820R | Stackpole Electronics Inc | 820 Ω | ±5% | 3 | ±200 | -55 to 235 | 5.50 x 15.00 | Active | Bulk |
| RSMF3JT820R | Stackpole Electronics Inc | 820 Ω | ±5% | 3 | ±200 | -55 to 235 | 5.50 x 15.00 | Active | Tape & Reel |
| ROX3SJ820R | TE Connectivity Passive Product | 820 Ω | ±5% | 3 | ±350 | -55 to 200 | 5.50 x 16.00 | Active | Cut Tape |
| RSF3JB820R | Stackpole Electronics Inc | 820 Ω | ±5% | 3 | ±200 | -55 to 235 | 6.00 x 17.50 | Active | Bulk |
| RSF3JT820R | Stackpole Electronics Inc | 820 Ω | ±5% | 3 | ±200 | -55 to 235 | 6.00 x 17.50 | Active | Tape & Reel |
Engineering Selection Recommendations
For Direct Replacement: RSS3W820RJTB from TE Connectivity Passive Product is the primary direct substitute. This part maintains identical electrical specifications and is currently in active production status with ROHS3 compliance. The operating temperature range extends to 155°C, which is lower than the original ERG-3SJ821 (235°C). Verify application temperature requirements before selection.
For Long-Term Availability: RSMF3JB820R and RSMF3JT820R from Stackpole Electronics Inc are upgrade substitutes offering active product status with extended availability. These parts feature improved temperature coefficient (±200ppm/°C versus ±300ppm/°C) and maintain the full operating temperature range of -55°C to 235°C. Both are ROHS3 compliant and REACH unaffected. Selection between bulk (RSMF3JB820R) and tape & reel (RSMF3JT820R) packaging depends on production volume and assembly requirements.
For High-Inventory Applications: ROX3SJ820R from TE Connectivity Passive Product offers the highest inventory availability (58,362 pcs) with active product status. Physical dimensions are slightly larger (16.00mm length versus 15.00mm), and temperature coefficient is ±350ppm/°C. This part is suitable for applications where PCB layout accommodates the larger form factor and temperature stability requirements are within specification.
For Flame-Retardant Coating Requirements: RSF3JB820R and RSF3JT820R from Stackpole Electronics Inc provide flame-retardant coating characteristics. These parts feature larger physical dimensions (6.00 x 17.50mm) and should be selected only when flame-retardant coating is a design requirement. Both are ROHS3 compliant and REACH unaffected.
All substitute parts are ROHS3 compliant and classified as EAR99 for export control purposes.
Frequently Asked Questions (FAQ)
Q: Can RSS3W820RJTB replace ERG-3SJ821 in all applications?
A: RSS3W820RJTB is electrically equivalent with identical resistance, tolerance, and power rating. However, the operating temperature range is limited to -55°C to 155°C compared to the ERG-3SJ821 range of -55°C to 235°C. Verify that your application does not require operation above 155°C before substitution.
Q: What is the difference between RSMF3JB820R and RSMF3JT820R?
A: Both parts are electrically identical 820 Ohms ±5% 3W resistors from Stackpole Electronics Inc with the same physical dimensions and performance characteristics. The difference is packaging: RSMF3JB820R is supplied in bulk, while RSMF3JT820R is supplied on tape & reel. Select based on your assembly process requirements.
Q: Why are RSF3JB820R and RSF3JT820R larger than the original ERG-3SJ821?
A: RSF series resistors feature flame-retardant coating, which requires larger physical dimensions (6.00 x 17.50mm versus 5.50 x 15.00mm). These parts should only be selected if flame-retardant coating is a design requirement. Verify PCB layout compatibility before substitution.
Q: Are all substitute parts RoHS compliant?
A: Yes, all listed substitute parts are ROHS3 compliant. The ERG-3SJ821 is also ROHS3 compliant. All parts are classified as EAR99 for export control purposes.
Q: Which substitute offers the best temperature stability?
A: RSMF3JB820R and RSMF3JT820R offer the best temperature coefficient at ±200ppm/°C, compared to ±300ppm/°C for the original ERG-3SJ821. ROX3SJ820R has a temperature coefficient of ±350ppm/°C. Select based on your circuit's temperature stability requirements.
Q: Can I use ROX3SJ820R if my PCB layout is tight?
A: ROX3SJ820R has a length of 16.00mm compared to 15.00mm for the ERG-3SJ821. Verify that your PCB layout accommodates the additional 1.00mm length before substitution. The diameter remains the same at 5.50mm.
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