RN732ATTD3010F25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3010F25 is a 301 Ohm ±1% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) surface mount package. This part is classified as obsolete, though 805 pieces remain in stock as new original inventory. The resistor features moisture-resistant construction with a temperature coefficient of ±25ppm/°C and operates across the temperature range of -55°C to 155°C. Due to its obsolete status, equivalent and substitute parts with active product status are necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Resistance	301 Ohms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±25ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3010F25 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Resistance value: 301 Ohms
Package / Case: 0805 (2012 Metric)
Composition: Thin Film
Operating temperature range: -55°C ~ 155°C minimum
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

Tolerance: ±1% or tighter (±0.5%, ±0.25%, ±0.1%)
Power rating: 0.1W or higher (0.125W acceptable)
Temperature coefficient: ±25ppm/°C or tighter (±10ppm/°C acceptable)
Product status: Active preferred over obsolete
Compliance certifications: ROHS3 Compliant, AEC-Q200 optional

Substitute parts are grouped into two categories: Direct Substitutes (same power rating and tolerance) and Upgrade Substitutes (enhanced tolerance, power rating, or certifications).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	AEC-Q200
RN732ATTD3010F25	KOA Speer	301 Ω	±1%	0.1	±25	-55 ~ 155	Obsolete	No
RN73R2ATTD3010F25	KOA Speer	301 Ω	±1%	0.125	±25	-55 ~ 155	Active	Yes
RT0805FRD07301RL	YAGEO	301 Ω	±1%	0.125	±25	-55 ~ 155	Active	No
1676298-5	TE Connectivity	301 Ω	±0.1%	0.1	±10	-55 ~ 155	Active	No
AT0805BRD07301RL	YAGEO	301 Ω	±0.1%	0.125	±25	-55 ~ 155	Active	Yes
AT0805CRD07301RL	YAGEO	301 Ω	±0.25%	0.125	±25	-55 ~ 155	Active	Yes
AT0805DRD07301RL	YAGEO	301 Ω	±0.5%	0.125	±25	-55 ~ 155	Active	Yes
CPF0805B301RE1	TE Connectivity	301 Ω	±0.1%	0.1	±25	-55 ~ 155	Active	No
ERA-6AEB3010V	Panasonic	301 Ω	±0.1%	0.125	±25	-55 ~ 155	Active	Yes
MCU08050D3010BP100	Vishay	301 Ω	±0.1%	0.125	±25	-55 ~ 125	Active	No
MCU08050D3010BP500	Vishay	301 Ω	±0.1%	0.125	±25	-55 ~ 125	Active	No

Engineering Selection Recommendations

Direct Substitutes (Same Tolerance ±1%):

RN73R2ATTD3010F25 (KOA Speer) and RT0805FRD07301RL (YAGEO) are direct functional equivalents with identical electrical specifications to the RN732ATTD3010F25. Both are active products with higher power ratings (0.125W vs. 0.1W), providing additional thermal margin. RN73R2ATTD3010F25 includes AEC-Q200 automotive qualification. Both maintain the same 0805 package footprint and operating temperature range.

Upgrade Substitutes (Enhanced Tolerance ±0.1%):

AT0805BRD07301RL, CPF0805B301RE1, ERA-6AEB3010V, MCU08050D3010BP100, and MCU08050D3010BP500 offer tighter tolerance specifications (±0.1%) compared to the original ±1%. These parts are suitable for applications requiring improved accuracy. AT0805BRD07301RL and ERA-6AEB3010V include AEC-Q200 automotive qualification. CPF0805B301RE1 maintains the original 0.1W power rating, while others provide 0.125W. All are active products.

Tolerance Intermediate Options (±0.25% and ±0.5%):

AT0805CRD07301RL (±0.25%) and AT0805DRD07301RL (±0.5%) from YAGEO provide intermediate tolerance specifications with AEC-Q200 qualification and 0.125W power rating. These are suitable for applications requiring better accuracy than ±1% but not requiring full ±0.1% precision.

Temperature Range Consideration:

MCU08050D3010BP100 and MCU08050D3010BP500 operate to -55°C ~ 125°C, which is narrower than the original -55°C ~ 155°C specification. These parts are suitable only for applications not requiring the full upper temperature range.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD3010F25 directly replace RN732ATTD3010F25?

A: Yes. RN73R2ATTD3010F25 is a direct substitute with identical resistance (301 Ohms), tolerance (±1%), package (0805), and operating temperature range (-55°C ~ 155°C). The higher power rating (0.125W vs. 0.1W) is compatible with applications designed for 0.1W. Both are thin film moisture-resistant resistors.

Q: What is the difference between direct substitutes and upgrade substitutes?

A: Direct substitutes maintain the same tolerance specification (±1%) as the original part. Upgrade substitutes offer tighter tolerance (±0.1%, ±0.25%, or ±0.5%), higher power ratings, or additional certifications such as AEC-Q200. Upgrade substitutes are electrically compatible but provide enhanced performance characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are ROHS3 Compliant except 1676298-5 (TE Connectivity), which has RoHS Status listed as Not applicable. All parts maintain MSL 1 (Unlimited) moisture sensitivity level.

Q: Can I use a ±0.1% tolerance part in place of a ±1% tolerance part?

A: Yes. Tighter tolerance specifications are backward compatible. A ±0.1% resistor meets all requirements of a ±1% specification. The actual resistance value will be closer to the nominal 301 Ohm value, which is beneficial for precision applications.

Q: What is the significance of AEC-Q200 qualification?

A: AEC-Q200 is an automotive qualification standard. Parts with AEC-Q200 certification (RN73R2ATTD3010F25, AT0805BRD07301RL, AT0805CRD07301RL, AT0805DRD07301RL, ERA-6AEB3010V) are qualified for automotive applications and meet additional reliability and environmental stress testing requirements. Non-automotive applications do not require this certification.

Q: Why do some parts have a narrower operating temperature range?

A: MCU08050D3010BP100 and MCU08050D3010BP500 operate to -55°C ~ 125°C instead of -55°C ~ 155°C. These parts are suitable only for applications where the maximum operating temperature does not exceed 125°C. Applications requiring operation to 155°C must use parts with the full temperature range.

Q: Is the 0805 package footprint identical across all substitute parts?

A: Yes. All substitute parts use the 0805 (2012 Metric) package with identical footprint dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm). Height variations are minimal (0.022" to 0.026" seated height), which do not affect PCB assembly compatibility.

Q: Can I use RT0805FRD07301RL (YAGEO) instead of the KOA Speer original?

A: Yes. RT0805FRD07301RL is a direct substitute with identical electrical specifications (301 Ohms, ±1%, 0.125W, 0805 package, -55°C ~ 155°C). It is an active product from a different manufacturer with equivalent performance characteristics.

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