RN732ATTD3012B50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD3012B50 is a 30.1 kOhms ±0.1% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement continuity. The part features moisture-resistant construction with a temperature coefficient of ±50ppm/°C and operates across the -55°C to 155°C temperature range. ROHS3 compliance and MSL 1 rating ensure environmental and reliability standards are met.

Key Parameters

Parameter	Value
Resistance	30.1 kOhms
Tolerance	±0.1%
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	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the RN732ATTD3012B50 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Resistance value: 30.1 kOhms
Tolerance: ±0.1%
Package / Case: 0805 (2012 Metric)
Composition: Thin Film
Operating Temperature Range: -55°C ~ 155°C minimum
Moisture Sensitivity Level: 1 (Unlimited)
RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

Power Rating: Substitutes may equal or exceed 0.1W (1/10W)
Temperature Coefficient: Substitutes may equal or improve upon ±50ppm/°C
Physical dimensions: Substitutes must maintain 0805 package compatibility

Substitute parts are categorized into two groups:

Direct Substitutes (Equivalent Power Rating): Parts rated at 0.1W or 0.125W (1/10W or 1/8W) that maintain functional equivalence with identical or improved temperature coefficient performance.

Upgrade Substitutes (Higher Power Rating): Parts rated at 0.125W, 0.25W (1/8W or 1/4W) or higher that provide enhanced thermal margin while maintaining all other critical parameters. These are suitable for applications where increased power dissipation capability is beneficial.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Op Temp Range	Features	Product Status
RN732ATTD3012B50	KOA Speer Electronics	30.1 kΩ	±0.1%	0.1	±50	-55 ~ 155°C	Moisture Resistant	Obsolete
RN73R2ATTD3012B50	KOA Speer Electronics	30.1 kΩ	±0.1%	0.125	±50	-55 ~ 155°C	Automotive AEC-Q200, Moisture Resistant	Active
RT0805BRE0730K1L	YAGEO	30.1 kΩ	±0.1%	0.125	±50	-55 ~ 155°C	Thin Film	Active
4-2176093-8	TE Connectivity Passive Product	30.1 kΩ	±0.1%	0.25	±25	-55 ~ 155°C	Thin Film	Active
AT0805BRD0730K1L	YAGEO	30.1 kΩ	±0.1%	0.125	±25	-55 ~ 155°C	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active
CPF0805B30K1E1	TE Connectivity Passive Product	30.1 kΩ	±0.1%	0.1	±25	-55 ~ 155°C	Thin Film	Active
CRT0805-BW-3012ELF	Bourns Inc.	30.1 kΩ	±0.1%	0.125	±10	-55 ~ 155°C	Current Sense Thin Film	Active
CRT0805-BY-3012ELF	Bourns Inc.	30.1 kΩ	±0.1%	0.125	±25	-55 ~ 155°C	Current Sense Thin Film	Active
ERA-6AEB3012V	Panasonic Electronic Components	30.1 kΩ	±0.1%	0.125	±25	-55 ~ 155°C	Automotive AEC-Q200 Thin Film	Active
MCU08050D3012BP100	Vishay Beyschlag/Draloric/BC Components	30.1 kΩ	±0.1%	0.125	±25	-55 ~ 125°C	Anti-Sulfur Thin Film	Active
MCU08050D3012BP500	Vishay Beyschlag/Draloric/BC Components	30.1 kΩ	±0.1%	0.125	±25	-55 ~ 125°C	Anti-Sulfur Thin Film	Active

Engineering Selection Recommendations

For Direct Replacement (Equivalent Performance):

RN73R2ATTD3012B50 (KOA Speer Electronics) provides the closest functional equivalent with active product status. This part maintains identical resistance, tolerance, and temperature range specifications while offering a modest power rating increase to 0.125W. The addition of Automotive AEC-Q200 certification provides enhanced reliability qualification.

CPF0805B30K1E1 (TE Connectivity Passive Product) matches the original 0.1W power rating with improved temperature coefficient (±25ppm/°C vs. ±50ppm/°C), providing superior stability. Active product status ensures long-term availability.

For Enhanced Thermal Performance:

RT0805BRE0730K1L (YAGEO) and ERA-6AEB3012V (Panasonic Electronic Components) offer 0.125W power rating with active status. ERA-6AEB3012V includes Automotive AEC-Q200 certification and maintains high inventory levels (46,956 pcs), supporting supply chain continuity.

For Superior Temperature Stability:

CRT0805-BW-3012ELF (Bourns Inc.) delivers the lowest temperature coefficient (±10ppm/°C) with 0.125W rating and current sense capability. This part is suitable for precision measurement applications requiring minimal drift.

AT0805BRD0730K1L (YAGEO) combines anti-sulfur protection with Automotive AEC-Q200 certification and ±25ppm/°C temperature coefficient, providing environmental robustness.

For Extended Temperature Range:

4-2176093-8 (TE Connectivity Passive Product) maintains the full -55°C to 155°C operating range with 0.25W power rating and ±25ppm/°C temperature coefficient, offering maximum thermal margin.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 rating. Parts with Automotive AEC-Q200 certification (RN73R2ATTD3012B50, AT0805BRD0730K1L, ERA-6AEB3012V) are qualified for automotive applications. MCU series parts (MCU08050D3012BP100, MCU08050D3012BP500) operate to -55°C ~ 125°C, which is acceptable for most industrial applications but does not extend to the full 155°C upper limit.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher power rating than the original RN732ATTD3012B50?

A: Yes. Substitute parts with power ratings of 0.125W, 0.25W, or higher are functionally compatible. Higher power ratings provide increased thermal margin and do not degrade circuit performance. The 0805 package dimensions remain identical across all listed substitutes.

Q: What is the significance of temperature coefficient differences between the original part and substitutes?

A: Temperature coefficient indicates resistance drift over temperature range. The original part specifies ±50ppm/°C. Substitutes with ±25ppm/°C or ±10ppm/°C offer improved stability, meaning less resistance variation across the operating temperature range. This is beneficial for precision circuits but not required for general applications.

Q: Are Automotive AEC-Q200 certified parts suitable for non-automotive applications?

A: Yes. Automotive AEC-Q200 certification indicates enhanced reliability qualification and environmental stress testing. These parts exceed standard industrial requirements and are fully compatible with non-automotive designs.

Q: What is the difference between the MCU series parts with BP100 and BP500 designations?

A: Both MCU08050D3012BP100 and MCU08050D3012BP500 are electrically and mechanically identical. The designation suffix indicates packaging quantity per reel. Both parts are functionally equivalent for circuit design purposes.

Q: Why do some substitutes have lower operating temperature maximum (125°C vs. 155°C)?

A: MCU series parts (Vishay) are rated to -55°C ~ 125°C, which is 30°C lower than the original specification. For applications operating below 125°C, these parts are fully compatible. Applications requiring operation above 125°C must use substitutes rated to 155°C.

Q: Is the original RN732ATTD3012B50 still available for procurement?

A: The RN732ATTD3012B50 is classified as obsolete. Current inventory of 968 pcs is available, but long-term procurement is not assured. Migration to active substitute parts is recommended for new designs and ongoing production.

Q: Can I substitute the RN732ATTD3012B50 with a part having different resistance value?

A: No. All listed substitutes maintain the exact 30.1 kOhms resistance value with ±0.1% tolerance. Resistance value is a critical parameter and cannot be varied without circuit redesign.

Q: What does MSL 1 (Unlimited) moisture sensitivity level mean?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed substitutes maintain MSL 1 rating, ensuring identical moisture management requirements.

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