RN732ATTD2580B50 Equivalent & Substitute Parts

Part Overview

The RN732ATTD2580B50 is a 258 Ohms ±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 component features moisture-resistant construction with a temperature coefficient of ±50ppm/°C and operates across -55°C to 155°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives from active product lines that maintain the same resistance value, tolerance, and package specifications while accommodating different power ratings and feature sets.

Key Parameters

Parameter	Value
Resistance	258 Ohms
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

Substitute Part Grouping Explanation

Substitution of the RN732ATTD2580B50 is determined by strict adherence to the following parameters: resistance value (258 Ohms), tolerance (±0.1%), package format (0805 / 2012 Metric), composition (thin film), and operating temperature range (-55°C ~ 155°C). All substitute parts listed maintain these core electrical and mechanical specifications. Power rating variations are permitted when the substitute part equals or exceeds the original 0.1W specification, as higher power-rated components operate within the same thermal and electrical envelope. Temperature coefficient differences (±25ppm/°C vs. ±50ppm/°C) and additional features (automotive AEC-Q200 certification, anti-sulfur coating, flame-proof construction, military qualification) represent functional enhancements that do not compromise compatibility. RoHS compliance status and moisture sensitivity level remain consistent across all substitutes at ROHS3 Compliant and MSL 1 (Unlimited), respectively.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Package	Product Status	RoHS Status
RN732ATTD2580B50	KOA Speer Electronics	258 Ω	±0.1%	0.1	±50	-55 ~ 155	0805	Obsolete	ROHS3
RN73R2ATTD2580B50	KOA Speer Electronics	258 Ω	±0.1%	0.125	±50	-55 ~ 155	0805	Active	ROHS3
PAT0805E2580BST1	Vishay Dale Thin Film	258 Ω	±0.1%	0.2	±25	-55 ~ 155	0805	Active	ROHS3
PHP00805E2580BBT1	Vishay Dale Thin Film	258 Ω	±0.1%	0.63	±25	-55 ~ 155	0805	Active	Non-compliant
PHP00805E2580BST1	Vishay Dale Thin Film	258 Ω	±0.1%	0.63	±25	-55 ~ 155	0805	Active	ROHS3
PHP00805H2580BBT1	Vishay Dale Thin Film	258 Ω	±0.1%	0.63	±50	-55 ~ 155	0805	Active	Non-compliant
PHP00805H2580BST1	Vishay Dale Thin Film	258 Ω	±0.1%	0.63	±50	-55 ~ 155	0805	Active	ROHS3
TNPW0805258RBETA	Vishay Dale	258 Ω	±0.1%	0.125	±25	-55 ~ 125	0805	Active	Non-compliant

Engineering Selection Recommendations

Direct Replacement (Same Power Rating): RN73R2ATTD2580B50 is the primary direct substitute from KOA Speer Electronics, maintaining the same manufacturer lineage, identical resistance and tolerance specifications, and equivalent 0.125W power rating with matching ±50ppm/°C temperature coefficient. This part is active and ROHS3 compliant, offering seamless integration into existing designs.

Higher Power Rating Substitutes (Enhanced Thermal Margin): PAT0805E2580BST1, PHP00805E2580BST1, PHP00805E2580BST1, PHP00805H2580BBT1, and PHP00805H2580BST1 provide increased power dissipation capacity (0.2W to 0.63W) while maintaining the 0805 package footprint and 258 Ohms ±0.1% specification. These parts accommodate designs requiring additional thermal headroom. PAT0805E2580BST1 features automotive AEC-Q200 certification and anti-sulfur coating. PHP series parts include flame-proof and safety-rated construction. Selection between PHP00805E2580BST1 and PHP00805H2580BST1 depends on temperature coefficient requirement (±25ppm/°C vs. ±50ppm/°C) and RoHS compliance necessity.

Military-Grade Alternative: TNPW0805258RBETA from Vishay Dale offers military-grade thin film construction with ±25ppm/°C temperature coefficient. Operating temperature range is -55°C to 125°C, which is narrower than the original specification. This part is active but RoHS non-compliant and REACH affected.

Compliance Considerations: For applications requiring ROHS3 compliance, select from RN73R2ATTD2580B50, PAT0805E2580BST1, PHP00805E2580BST1, or PHP00805H2580BST1. For applications without RoHS requirements, PHP00805E2580BBT1, PHP00805H2580BBT1, and TNPW0805258RBETA are available.

Frequently Asked Questions (FAQ)

Q: Can I use a higher power-rated substitute in place of the RN732ATTD2580B50? A: Yes. Substitute parts with power ratings of 0.125W, 0.2W, or 0.63W are electrically and mechanically compatible. Higher power ratings indicate greater thermal dissipation capability and do not affect circuit performance when the original 0.1W specification is met or exceeded.

Q: What is the difference between RN73R2ATTD2580B50 and the original RN732ATTD2580B50? A: Both parts are manufactured by KOA Speer Electronics with identical 258 Ohms ±0.1% specifications and ±50ppm/°C temperature coefficient. RN73R2ATTD2580B50 has a slightly higher power rating (0.125W vs. 0.1W) and includes automotive AEC-Q200 certification. The original is obsolete; RN73R2ATTD2580B50 is active.

Q: Are all substitute parts available in 0805 package format? A: Yes. All listed substitute parts are specified for 0805 (2012 Metric) package format with identical footprint dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm), ensuring direct PCB compatibility.

Q: What does ±0.1% tolerance mean, and is it maintained across all substitutes? A: ±0.1% tolerance specifies that the actual resistance value will not deviate more than 0.1% from the nominal 258 Ohms specification. All substitute parts maintain this tolerance, ensuring consistent circuit performance.

Q: Which substitute should I select for automotive applications? A: PAT0805E2580BST1 and RN73R2ATTD2580B50 both carry automotive AEC-Q200 certification. PAT0805E2580BST1 additionally features anti-sulfur coating and higher power rating (0.2W). RN73R2ATTD2580B50 maintains the original temperature coefficient (±50ppm/°C).

Q: What is the significance of temperature coefficient differences (±25ppm/°C vs. ±50ppm/°C)? A: Temperature coefficient indicates resistance value drift per degree Celsius change. ±25ppm/°C represents tighter stability across temperature variations compared to ±50ppm/°C. Selection depends on circuit precision requirements.

Q: Are moisture-resistant properties maintained across all substitutes? A: Yes. All substitute parts are specified with moisture-resistant thin film construction and MSL 1 (Unlimited) rating, indicating no moisture sensitivity limitations.

Q: Can I use TNPW0805258RBETA if my application operates above 125°C? A: No. TNPW0805258RBETA has a maximum operating temperature of 125°C, which is below the original specification of 155°C. For applications requiring full -55°C to 155°C range, select alternative substitutes.

Q: What is the difference between RoHS-compliant and non-compliant parts? A: ROHS3-compliant parts meet Restriction of Hazardous Substances regulations and are suitable for applications with environmental compliance requirements. Non-compliant parts may contain restricted substances and are limited to applications without such requirements.

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