RN732ATTD4530F50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4530F50 is a 453 Ohm ±1% thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This component features moisture-resistant construction with a temperature coefficient of ±50ppm/°C and operates across the -55°C to 155°C temperature range. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement continuity.

Key Parameters

Parameter	Value
Resistance	453 Ohms
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	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4530F50 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Resistance value: 453 Ohms
Package format: 0805 (2012 Metric)
Composition: Thin Film
Temperature coefficient: ±50ppm/°C
Operating temperature range: -55°C ~ 155°C
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

Tolerance: ±1% or tighter (±0.5%, ±0.25%, ±0.1%)
Power rating: Equal to or greater than 0.1W (1/10W)
Compliance certifications: RoHS3 Compliant or equivalent
Automotive qualification: AEC-Q200 acceptable for general applications

Substitute parts are grouped into two categories: direct equivalents (matching tolerance and power rating) and upgrades (improved tolerance and/or power rating with identical mechanical and thermal characteristics).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Temp Range	Status	RoHS
RN732ATTD4530F50	KOA Speer	453 Ω	±1%	0.1	0805	±50ppm/°C	-55~155°C	Obsolete	ROHS3
RN73R2ATTD4530F50	KOA Speer	453 Ω	±1%	0.125	0805	±50ppm/°C	-55~155°C	Active	ROHS3
RT0805FRE07453RL	YAGEO	453 Ω	±1%	0.125	0805	±50ppm/°C	-55~155°C	Active	ROHS3
AT0805DRE07453RL	YAGEO	453 Ω	±0.5%	0.125	0805	±50ppm/°C	-55~155°C	Active	ROHS3
MCU08050C4530FP500	Vishay Beyschlag	453 Ω	±1%	0.125	0805	±50ppm/°C	-55~155°C	Active	ROHS3
PHP00805H4530BST1	Vishay Dale	453 Ω	±0.1%	0.63	0805	±50ppm/°C	-55~155°C	Active	ROHS3
RNCF0805BTC453R	Stackpole	453 Ω	±0.1%	0.25	0805	±50ppm/°C	-55~155°C	Active	ROHS3
RNCF0805DTC453R	Stackpole	453 Ω	±0.5%	0.25	0805	±50ppm/°C	-55~155°C	Active	ROHS3
RT0805BRE07453RL	YAGEO	453 Ω	±0.1%	0.125	0805	±50ppm/°C	-55~155°C	Active	ROHS3
RT0805CRE07453RL	YAGEO	453 Ω	±0.25%	0.125	0805	±50ppm/°C	-55~155°C	Active	ROHS3

Engineering Selection Recommendations

Direct Equivalent (Same Tolerance & Power Rating):

RN73R2ATTD4530F50 (KOA Speer) and RT0805FRE07453RL (YAGEO) serve as direct functional equivalents to the obsolete RN732ATTD4530F50. Both maintain ±1% tolerance and 0.125W power rating with identical thermal and mechanical specifications. RN73R2ATTD4530F50 includes automotive AEC-Q200 qualification. Both are ROHS3 compliant and actively manufactured.

Tolerance Upgrade Options:

AT0805DRE07453RL (YAGEO) provides ±0.5% tolerance with AEC-Q200 automotive qualification and anti-sulfur features. RT0805BRE07453RL (YAGEO) and RNCF0805BTC453R (Stackpole) offer ±0.1% tolerance. RNCF0805DTC453R (Stackpole) provides ±0.5% tolerance with AEC-Q200 rating. These upgrades maintain 0.125W to 0.25W power ratings suitable for applications requiring improved accuracy.

Power Rating Upgrade Option:

PHP00805H4530BST1 (Vishay Dale) delivers ±0.1% tolerance with 0.63W (5/8W) power rating, flame-proof and safety-rated construction. This option accommodates applications with higher power dissipation requirements while maintaining the 0805 package footprint.

Compliance Considerations:

All recommended substitutes are ROHS3 compliant. Applications requiring automotive qualification should specify RN73R2ATTD4530F50, AT0805DRE07453RL, RNCF0805BTC453R, or RNCF0805DTC453R, all carrying AEC-Q200 certification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher tolerance (e.g., ±0.5%) in place of the ±1% original?

A: Yes. Tighter tolerance specifications are functionally compatible. A ±0.5% part meets all requirements of a ±1% application. Verify circuit design does not depend on the wider tolerance band.

Q: What is the difference between direct equivalents and upgrade parts?

A: Direct equivalents match the original part's tolerance and power rating. Upgrade parts offer improved tolerance accuracy and/or higher power dissipation capability while maintaining identical resistance, package, and thermal characteristics.

Q: Are all substitute parts suitable for automotive applications?

A: No. Only parts explicitly marked with AEC-Q200 qualification are automotive-grade: RN73R2ATTD4530F50, AT0805DRE07453RL, RNCF0805BTC453R, and RNCF0805DTC453R. Verify application requirements before selection.

Q: Does package size change between the main part and substitutes?

A: No. All listed substitutes maintain the 0805 (2012 Metric) package format with identical footprint dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm). PCB layout compatibility is preserved.

Q: What is the significance of Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture bake-out requirements. All listed parts carry MSL 1 rating, ensuring identical moisture handling and storage protocols.

Q: Can I substitute PHP00805H4530BST1 in a circuit designed for 0.1W power rating?

A: Yes. The PHP00805H4530BST1 rated at 0.63W exceeds the 0.1W requirement. Higher power rating provides design margin. Verify physical height clearance: PHP00805H4530BST1 seated height is 0.033" (0.84mm) versus 0.024" (0.60mm) for standard 0805 parts.

Q: Are there any RoHS compliance differences between substitutes?

A: All recommended substitutes are ROHS3 compliant except PHP00805H4530BBT1, which is RoHS non-compliant. Use PHP00805H4530BST1 (ROHS3 compliant version) for RoHS-regulated applications.

Q: What temperature coefficient applies to all substitute parts?

A: All substitute parts maintain ±50ppm/°C temperature coefficient matching the original RN732ATTD4530F50, ensuring identical thermal stability across the -55°C to 155°C operating range.

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