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RN732ATTD1271F50 Equivalent & Substitute Parts
Part Overview
The RN732ATTD1271F50 is a 1.27 kOhms ±1% 0.1W thin film chip resistor in 0805 (2012 Metric) package manufactured by KOA Speer Electronics, Inc. This part is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts maintain the same resistance value, tolerance, package footprint, and operating temperature range while offering alternative manufacturers, enhanced specifications, or active product status.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 1.27 kOhms |
| Tolerance | ±1% |
| Power Rating | 0.1W (1/10W) |
| Package / Case | 0805 (2012 Metric) |
| Composition | Thin Film |
| Temperature Coefficient | ±50ppm/°C |
| Operating Temperature Range | -55°C ~ 155°C |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the RN732ATTD1271F50 are categorized based on the following substitution criteria:
Direct Equivalents maintain identical electrical specifications (1.27 kOhms, ±1% tolerance, 0.1W power rating) and package dimensions while offering active product status or alternative manufacturers. These parts are pin-compatible and functionally interchangeable without circuit modification.
Upgraded Substitutes provide enhanced specifications including higher power ratings (0.125W to 0.63W), improved tolerance (±0.1% vs ±1%), or additional certifications (Automotive AEC-Q200, Anti-Sulfur, Flame Proof). These parts are backward-compatible and suitable for applications requiring higher performance margins or specific environmental ratings.
Key Parameters for Substitution:
- Resistance value: 1.27 kOhms (fixed)
- Package footprint: 0805 (2012 Metric) (fixed)
- Temperature coefficient: ±50ppm/°C (fixed)
- Operating temperature range: -55°C ~ 155°C (fixed)
- Composition: Thin Film (fixed)
- Tolerance: ±1% minimum (can be improved)
- Power rating: 0.1W minimum (can be increased)
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Resistance | Tolerance | Power (Watts) | Package | Composition | Temp Coeff | Operating Temp | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| RN732ATTD1271F50 | KOA Speer Electronics, Inc. | 1.27 kOhms | ±1% | 0.1W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Obsolete | ROHS3 Compliant |
| RN73R2ATTD1271F50 | KOA Speer Electronics, Inc. | 1.27 kOhms | ±1% | 0.125W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Active | ROHS3 Compliant |
| RT0805FRE071K27L | YAGEO | 1.27 kOhms | ±1% | 0.125W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Active | ROHS3 Compliant |
| MCU08050C1271FP500 | Vishay Beyschlag/Draloric/BC Components | 1.27 kOhms | ±1% | 0.125W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Active | ROHS3 Compliant |
| PHP00805H1271BBT1 | Vishay Dale Thin Film | 1.27 kOhms | ±0.1% | 0.63W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Active | RoHS non-compliant |
| PHP00805H1271BST1 | Vishay Dale Thin Film | 1.27 kOhms | ±0.1% | 0.63W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Active | ROHS3 Compliant |
| RNCF0805BTC1K27 | Stackpole Electronics Inc | 1.27 kOhms | ±0.1% | 0.25W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Active | ROHS3 Compliant |
| RNCF0805DTC1K27 | Stackpole Electronics Inc | 1.27 kOhms | ±0.5% | 0.25W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Active | ROHS3 Compliant |
| RNCS0805BKC1K27 | Stackpole Electronics Inc | 1.27 kOhms | ±0.1% | 0.1W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Active | ROHS3 Compliant |
| RNCS0805BTC1K27 | Stackpole Electronics Inc | 1.27 kOhms | ±0.1% | 0.1W | 0805 | Thin Film | ±50ppm/°C | -55°C ~ 155°C | Active | ROHS3 Compliant |
Engineering Selection Recommendations
For Direct Replacement (Obsolete Part Mitigation): Select RN73R2ATTD1271F50 (KOA Speer Electronics, Inc.) or RT0805FRE071K27L (YAGEO) as primary alternatives. Both parts maintain ±1% tolerance, offer active product status, and provide ROHS3 compliance. RN73R2ATTD1271F50 includes Automotive AEC-Q200 certification for applications requiring automotive-grade reliability.
For Enhanced Performance Applications: RNCS0805BTC1K27 or RNCS0805BKC1K27 (Stackpole Electronics Inc) provide ±0.1% tolerance with identical 0.1W power rating and active product status. Both include Automotive AEC-Q200 certification and anti-corrosive features. These parts are suitable for precision measurement circuits and automotive applications.
For Higher Power Margin Applications: RNCF0805BTC1K27 (Stackpole Electronics Inc) offers 0.25W power rating with ±0.1% tolerance and Automotive AEC-Q200 certification. PHP00805H1271BST1 (Vishay Dale Thin Film) provides 0.63W power rating with ±0.1% tolerance, Flame Proof, and Moisture Resistant features, suitable for high-reliability applications. PHP00805H1271BST1 is ROHS3 compliant.
Compliance Considerations: All recommended substitutes maintain ROHS3 compliance except PHP00805H1271BBT1, which is RoHS non-compliant. MCU08050C1271FP500 (Vishay Beyschlag) offers Anti-Sulfur features for corrosive environments while maintaining ROHS3 compliance.
Frequently Asked Questions (FAQ)
Q: Can RN732ATTD1271F50 be directly replaced with RN73R2ATTD1271F50? A: Yes. Both parts share identical resistance (1.27 kOhms), tolerance (±1%), package (0805), composition (Thin Film), and operating temperature range (-55°C ~ 155°C). RN73R2ATTD1271F50 has a slightly higher power rating (0.125W vs 0.1W) and active product status, making it a suitable direct replacement.
Q: What is the difference between direct equivalents and upgraded substitutes? A: Direct equivalents maintain the same electrical specifications as the original part. Upgraded substitutes provide enhanced performance characteristics such as higher power ratings, improved tolerance, or additional certifications (Automotive AEC-Q200, Anti-Sulfur, Flame Proof) while maintaining backward compatibility.
Q: Are all substitute parts ROHS3 compliant? A: No. PHP00805H1271BBT1 is RoHS non-compliant. All other listed substitutes are ROHS3 compliant. Verify compliance requirements for your specific application before selection.
Q: Can I use a 0.25W or 0.63W rated resistor in place of the 0.1W original? A: Yes. Higher power-rated resistors are backward-compatible and provide additional thermal margin. However, verify that the increased physical dimensions (height) do not conflict with PCB layout constraints. Refer to the Height - Seated (Max) specifications in the parameter comparison table.
Q: Which substitute offers the best tolerance for precision applications? A: RNCS0805BTC1K27, RNCS0805BKC1K27, RNCF0805BTC1K27, PHP00805H1271BBT1, and PHP00805H1271BST1 all offer ±0.1% tolerance, compared to the original ±1%. These parts are suitable for precision measurement and signal conditioning circuits.
Q: Are automotive-rated substitutes available? A: Yes. RN73R2ATTD1271F50, RNCF0805BTC1K27, RNCF0805DTC1K27, RNCS0805BKC1K27, and RNCS0805BTC1K27 all include Automotive AEC-Q200 certification, suitable for automotive applications requiring reliability standards compliance.
Q: What is the MSL rating for all substitute parts? A: All listed substitute parts have MSL 1 (Unlimited), indicating no moisture sensitivity limitations during storage or handling.
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