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RN732ATTD9102B25 Equivalent & Substitute Parts
Part Overview
The RN732ATTD9102B25 is a 91 kOhms ±0.1% thin film chip resistor in 0805 (2012 Metric) package manufactured by KOA Speer Electronics, Inc. This component is rated for 0.1W (1/10W) power dissipation with moisture-resistant construction and operates across -55°C to 155°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 91 kOhms |
| Tolerance | ±0.1% |
| Power Rating | 0.1W (1/10W) |
| Package | 0805 (2012 Metric) |
| Composition | Thin Film |
| Temperature Coefficient | ±25ppm/°C |
| Operating Temperature Range | -55°C to 155°C |
| Features | Moisture Resistant |
| Terminations | 2 |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the RN732ATTD9102B25 is determined by strict equivalence across the following critical parameters:
Mandatory Matching Parameters:
- Resistance value: 91 kOhms
- Tolerance: ±0.1%
- Package type: 0805 (2012 Metric)
- Composition: Thin Film
- Temperature coefficient: ±25ppm/°C
- Operating temperature range: -55°C to 155°C
- Termination count: 2
- RoHS3 compliance
- MSL rating: 1
Allowable Variation:
- Power rating: Equal or greater than 0.1W (1/10W)
- Product status: Active status preferred for obsolete parts
The substitute part RN73R2ATTD9102B25 maintains all mandatory parameters while providing increased power rating (0.125W / 1/8W) and active product status with automotive AEC-Q200 qualification.
Parameter Comparison
| Parameter | RN732ATTD9102B25 (Main) | RN73R2ATTD9102B25 (Substitute) | Match Status |
|---|---|---|---|
| Manufacturer | KOA Speer Electronics, Inc. | KOA Speer Electronics, Inc. | Identical |
| Resistance | 91 kOhms | 91 kOhms | Identical |
| Tolerance | ±0.1% | ±0.1% | Identical |
| Power Rating | 0.1W (1/10W) | 0.125W (1/8W) | Substitute Higher |
| Package | 0805 (2012 Metric) | 0805 (2012 Metric) | Identical |
| Composition | Thin Film | Thin Film | Identical |
| Temperature Coefficient | ±25ppm/°C | ±25ppm/°C | Identical |
| Operating Temperature | -55°C to 155°C | -55°C to 155°C | Identical |
| Features | Moisture Resistant | Automotive AEC-Q200, Moisture Resistant | Substitute Enhanced |
| Product Status | Obsolete | Active | Substitute Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Identical |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | Identical |
| Size / Dimension | 0.079" L x 0.049" W (2.00mm x 1.25mm) | 0.079" L x 0.049" W (2.00mm x 1.25mm) | Identical |
| Height - Seated (Max) | 0.024" (0.60mm) | 0.024" (0.60mm) | Identical |
Engineering Selection Recommendations
The RN73R2ATTD9102B25 is a direct functional substitute for the obsolete RN732ATTD9102B25. Selection is based on the following engineering criteria:
Product Status: The substitute part maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.
Electrical Equivalence: Both parts share identical resistance (91 kOhms), tolerance (±0.1%), temperature coefficient (±25ppm/°C), and operating temperature range (-55°C to 155°C). The substitute's increased power rating (0.125W versus 0.1W) provides additional thermal margin without affecting circuit performance.
Compliance & Certifications: Both parts are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity level). The substitute includes automotive AEC-Q200 qualification, indicating enhanced reliability testing and suitability for demanding applications.
Physical Compatibility: Identical 0805 (2012 Metric) package dimensions and termination configuration ensure direct PCB footprint compatibility without layout modifications.
Frequently Asked Questions (FAQ)
Q: Can RN73R2ATTD9102B25 be used as a direct replacement for RN732ATTD9102B25?
A: Yes. Both parts are electrically and mechanically equivalent with identical resistance, tolerance, package, and operating specifications. The substitute offers higher power rating and active product status.
Q: What is the significance of the higher power rating (0.125W vs 0.1W)?
A: The substitute's 0.125W rating provides 25% additional power dissipation capacity. This does not affect circuit operation when the original 0.1W rating was sufficient; it only provides additional thermal headroom and reliability margin.
Q: Are there any PCB layout changes required?
A: No. Both parts use identical 0805 (2012 Metric) package dimensions (2.00mm x 1.25mm length, 1.25mm width, 0.60mm maximum seated height). Existing PCB footprints are fully compatible.
Q: What does AEC-Q200 qualification mean?
A: AEC-Q200 is an automotive electronics reliability qualification standard. The substitute part meets enhanced testing and reliability requirements for automotive applications, though it functions identically in non-automotive circuits.
Q: Are moisture sensitivity levels the same?
A: Yes. Both parts have MSL rating 1 (unlimited), indicating no moisture sensitivity restrictions for storage or handling.
Q: Can the substitute be used in high-precision applications requiring ±0.1% tolerance?
A: Yes. The substitute maintains ±0.1% tolerance and ±25ppm/°C temperature coefficient, meeting precision requirements identical to the main part.
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