RN732ATTD1151D25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD1151D25 is a 1.15 kOhms ±0.5% thin film chip resistor manufactured by KOA Speer Electronics in 0805 (2012 Metric) package format with 0.1W power rating. This component is classified as obsolete product status. Substitute parts are necessary to maintain design continuity and ensure supply chain availability for new production runs and field replacements where the original part is no longer manufactured or stocked.

Key Parameters

Parameter	Value
Resistance	1.15 kOhms
Tolerance	±0.5%
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 RN732ATTD1151D25 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Resistance value: 1.15 kOhms
Package / Case: 0805 (2012 Metric)
Composition: Thin Film
Temperature Coefficient: ±25ppm/°C
Moisture Sensitivity Level: 1 (Unlimited)
RoHS Status: ROHS3 Compliant

Allowable Variations:

Tolerance: ±0.5% or tighter (±0.1%, ±0.25%)
Power Rating: 0.1W or higher (0.125W acceptable)
Operating Temperature Range: Must encompass -55°C to 155°C minimum
Product Status: Active preferred; obsolete acceptable only for direct equivalents

Substitute parts are grouped into two categories: direct equivalents (matching all parameters) and upgrades (improved tolerance or power rating while maintaining compatibility).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff	Op. Temp Range	Product Status	Features
RN732ATTD1151D25	KOA Speer	1.15 kΩ	±0.5%	0.1	±25ppm/°C	-55°C ~ 155°C	Obsolete	Moisture Resistant
RN73R2ATTD1151D25	KOA Speer	1.15 kΩ	±0.5%	0.125	±25ppm/°C	-55°C ~ 155°C	Active	Automotive AEC-Q200, Moisture Resistant
RR1220P-1151-D-M	Susumu	1.15 kΩ	±0.5%	0.1	±25ppm/°C	-55°C ~ 125°C	Active	Thin Film
RT0805DRD071K15L	YAGEO	1.15 kΩ	±0.5%	0.125	±25ppm/°C	-55°C ~ 155°C	Active	Thin Film
AT0805BRD071K15L	YAGEO	1.15 kΩ	±0.1%	0.125	±25ppm/°C	-55°C ~ 155°C	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
AT0805CRD071K15L	YAGEO	1.15 kΩ	±0.25%	0.125	±25ppm/°C	-55°C ~ 155°C	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
AT0805DRD071K15L	YAGEO	1.15 kΩ	±0.5%	0.125	±25ppm/°C	-55°C ~ 155°C	Active	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant
CPF0805B1K15E1	TE Connectivity	1.15 kΩ	±0.1%	0.1	±25ppm/°C	-55°C ~ 155°C	Active	Thin Film
ERA-6AEB1151V	Panasonic	1.15 kΩ	±0.1%	0.125	±25ppm/°C	-55°C ~ 155°C	Active	Automotive AEC-Q200
MCU08050D1151BP100	Vishay	1.15 kΩ	±0.1%	0.125	±25ppm/°C	-55°C ~ 125°C	Active	Anti-Sulfur
MCU08050D1151BP500	Vishay	1.15 kΩ	±0.1%	0.125	±25ppm/°C	-55°C ~ 125°C	Active	Anti-Sulfur

Engineering Selection Recommendations

Direct Equivalent (Same Electrical Performance):

RR1220P-1151-D-M from Susumu provides direct electrical equivalence with matching 1.15 kOhms resistance, ±0.5% tolerance, and 0.1W power rating in 0805 package. This part maintains identical performance specifications and is currently in active production status. Operating temperature range extends to -55°C ~ 125°C, which covers the original specification minimum requirement.

Preferred Substitute (Enhanced Specifications, Active Status):

RN73R2ATTD1151D25 from KOA Speer is the direct successor within the same manufacturer family. It maintains 1.15 kOhms ±0.5% specifications while increasing power rating to 0.125W and adding Automotive AEC-Q200 qualification. Operating temperature range matches the original at -55°C ~ 155°C. This part is currently in active production.

Upgrade Options (Improved Tolerance):

AT0805BRD071K15L, AT0805CRD071K15L, and AT0805DRD071K15L from YAGEO offer tighter tolerance specifications (±0.1% and ±0.25%) with enhanced features including Anti-Sulfur coating and Automotive AEC-Q200 qualification. All maintain 1.15 kOhms resistance in 0805 package with 0.125W power rating and -55°C ~ 155°C operating range.

CPF0805B1K15E1 from TE Connectivity provides ±0.1% tolerance with matching 0.1W power rating and full temperature range coverage (-55°C ~ 155°C).

ERA-6AEB1151V from Panasonic offers ±0.1% tolerance, 0.125W power rating, and Automotive AEC-Q200 qualification with extensive inventory availability (30,295 pcs).

MCU08050D1151BP100 and MCU08050D1151BP500 from Vishay provide ±0.1% tolerance with Anti-Sulfur coating and 0.125W power rating. Operating temperature range is -55°C ~ 125°C.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and thin film composition matching the original specification.

Frequently Asked Questions (FAQ)

Q: Can RR1220P-1151-D-M from Susumu be used as a direct replacement for RN732ATTD1151D25?

A: Yes. RR1220P-1151-D-M provides direct electrical equivalence with identical 1.15 kOhms resistance, ±0.5% tolerance, 0.1W power rating, and 0805 package. Both are thin film composition with ±25ppm/°C temperature coefficient. The Susumu part is currently in active production status, addressing the obsolescence of the original KOA part.

Q: What is the difference between the 0.1W and 0.125W power ratings?

A: Power rating indicates the maximum continuous power dissipation capability. The 0.125W (1/8W) rating provides 25% higher power handling capacity than 0.1W (1/10W). In circuit applications where power dissipation does not exceed 0.1W, either rating is acceptable. The 0.125W rated parts offer additional design margin without affecting electrical performance at the specified resistance and tolerance values.

Q: Are the YAGEO AT series parts with ±0.1% and ±0.25% tolerance compatible with the original ±0.5% specification?

A: Yes. Tighter tolerance specifications are compatible with applications designed for ±0.5% tolerance. The AT0805BRD071K15L (±0.1%), AT0805CRD071K15L (±0.25%), and AT0805DRD071K15L (±0.5%) all deliver 1.15 kOhms resistance within narrower tolerance bands than the original specification, providing improved circuit accuracy without requiring design changes.

Q: What does Automotive AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive industry qualification standard for passive components. Parts bearing this rating have undergone additional reliability testing and are approved for automotive applications. RN73R2ATTD1151D25, AT0805BRD071K15L, AT0805CRD071K15L, AT0805DRD071K15L, and ERA-6AEB1151V carry this qualification, making them suitable for automotive and high-reliability applications.

Q: Why do some substitute parts have lower maximum operating temperature (-55°C ~ 125°C vs. -55°C ~ 155°C)?

A: RR1220P-1151-D-M from Susumu and MCU series parts from Vishay specify -55°C ~ 125°C maximum operating temperature. This is still within acceptable range for most industrial and commercial applications. If the design requires operation at temperatures above 125°C, select parts with -55°C ~ 155°C rating such as RN73R2ATTD1151D25, RT0805DRD071K15L, YAGEO AT series, CPF0805B1K15E1, or ERA-6AEB1151V.

Q: What is the significance of Anti-Sulfur coating?

A: Anti-Sulfur coating protects resistor terminations from sulfur-induced corrosion in environments with hydrogen sulfide exposure. AT0805BRD071K15L, AT0805CRD071K15L, AT0805DRD071K15L, MCU08050D1151BP100, and MCU08050D1151BP500 include this feature, providing enhanced reliability in industrial and harsh environments.

Q: Can I use MCU08050D1151BP100 or MCU08050D1151BP500 interchangeably?

A: Both MCU08050D1151BP100 and MCU08050D1151BP500 are electrically identical with 1.15 kOhms ±0.1%, 0.125W power rating, and -55°C ~ 125°C operating range. The part number suffix indicates different packaging quantities (100 and 500 piece reels). Selection depends on procurement requirements; both are functionally equivalent for circuit design purposes.

Q: Is inventory availability a factor in selecting substitute parts?

A: Inventory levels are provided for reference but do not affect electrical compatibility. ERA-6AEB1151V from Panasonic has the highest inventory (30,295 pcs), while other parts range from 694 to 6,007 pcs. Availability may influence procurement timelines but does not determine technical suitability for substitution.

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