RN732ATTD4020F100 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4020F100 is a 402 Ohms ±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 is classified as obsolete product status. Due to its obsolete designation, equivalent and substitute parts with active product status are necessary to ensure continued design support, procurement availability, and long-term supply chain reliability. Substitute parts maintain the core electrical specifications while offering enhanced features, improved temperature coefficients, or automotive/military certifications depending on application requirements.

Key Parameters

Parameter	Value
Resistance	402 Ohms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Composition	Thin Film
Package / Case	0805 (2012 Metric)
Operating Temperature Range	-55°C ~ 155°C
Temperature Coefficient	±100ppm/°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RN732ATTD4020F100 is determined by strict adherence to the following parameters:

Core Electrical Compatibility Requirements:

Resistance value: 402 Ohms (exact match required)
Tolerance: ±1% (exact match required)
Composition: Thin Film (exact match required)
Package: 0805 (2012 Metric) (exact match required)

Allowable Variations:

Power rating: Substitute parts may have equal or higher power ratings (0.125W, 0.26W acceptable; lower ratings not acceptable)
Temperature coefficient: May vary (±25ppm/°C, ±50ppm/°C, ±100ppm/°C all acceptable)
Operating temperature range: May extend beyond -55°C ~ 155°C (equal or wider range acceptable)
Features: Additional certifications (AEC-Q200, Military, Anti-Sulfur) are acceptable enhancements
Product status: Active status preferred over obsolete

All substitute parts listed maintain identical mechanical dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm) and electrical core specifications, ensuring direct PCB compatibility without design modification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	RoHS Status
RN732ATTD4020F100	KOA Speer Electronics	402 Ω	±1%	0.1	±100	-55 ~ 155	Obsolete	ROHS3 Compliant
RN73R2ATTD4020F100	KOA Speer Electronics	402 Ω	±1%	0.125	±100	-55 ~ 155	Active	ROHS3 Compliant
MCU08050C4020FP500	Vishay Beyschlag/Draloric/BC Components	402 Ω	±1%	0.125	±50	-55 ~ 155	Active	ROHS3 Compliant
RT0805FRD07402RL	YAGEO	402 Ω	±1%	0.125	±25	-55 ~ 155	Active	ROHS3 Compliant
RT0805FRE07402RL	YAGEO	402 Ω	±1%	0.125	±50	-55 ~ 155	Active	ROHS3 Compliant
TNPW0805402RFEEA	Vishay Dale	402 Ω	±1%	0.26	±25	-55 ~ 175	Active	ROHS3 Compliant
TNPW0805402RFETA	Vishay Dale	402 Ω	±1%	0.125	±25	-55 ~ 125	Active	RoHS non-compliant
TNPW0805402RFHTA	Vishay Dale	402 Ω	±1%	0.125	±50	-55 ~ 125	Active	RoHS non-compliant

Engineering Selection Recommendations

Primary Recommendation for General Applications: RN73R2ATTD4020F100 (KOA Speer Electronics) is the direct successor to the obsolete RN732ATTD4020F100. This part maintains manufacturer continuity, identical electrical specifications, and ROHS3 compliance. The increased power rating (0.125W vs. 0.1W) provides design margin without requiring circuit modification. Active product status ensures long-term availability.

For Enhanced Temperature Stability: RT0805FRD07402RL or RT0805FRE07402RL (YAGEO) offer superior temperature coefficients (±25ppm/°C and ±50ppm/°C respectively) compared to the original ±100ppm/°C specification. Both maintain ROHS3 compliance and active product status. These selections are suitable for precision analog circuits requiring tighter tolerance performance.

For Automotive Applications: RN73R2ATTD4020F100 (KOA Speer) includes AEC-Q200 automotive qualification. TNPW0805402RFEEA (Vishay Dale) provides automotive AEC-Q200 certification with extended operating temperature range (-55°C ~ 175°C) and highest power rating (0.26W). Both are ROHS3 compliant and active.

For Military/Aerospace Applications: TNPW0805402RFETA or TNPW0805402RFHTA (Vishay Dale) carry military specifications. Note: These parts are RoHS non-compliant and REACH Affected, requiring verification against program requirements before selection.

For Cost-Optimized Procurement: MCU08050C4020FP500 (Vishay Beyschlag) offers active status, ROHS3 compliance, and anti-sulfur thin film construction at competitive inventory levels (738 pcs in stock).

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher power rating than the original RN732ATTD4020F100?

A: Yes. The original part is rated 0.1W (1/10W). All listed substitutes with 0.125W, 0.26W, or higher ratings are electrically compatible. Higher power ratings provide additional thermal margin and do not affect circuit operation when the original design requires only 0.1W dissipation. PCB layout and thermal management remain unchanged.

Q: What is the difference between the temperature coefficient values (±25ppm/°C, ±50ppm/°C, ±100ppm/°C)?

A: Temperature coefficient indicates resistance value drift per degree Celsius change. Lower values (±25ppm/°C) represent superior stability across temperature extremes. The original RN732ATTD4020F100 specifies ±100ppm/°C. Substitutes with ±25ppm/°C or ±50ppm/°C provide tighter tolerance maintenance over the operating temperature range, beneficial for precision applications. Standard applications tolerate all three specifications.

Q: Are all substitute parts physically identical to the original RN732ATTD4020F100?

A: Yes. All substitute parts use 0805 (2012 Metric) package with identical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm). Height variations are minimal (0.022" to 0.024" seated height). Direct PCB footprint compatibility is confirmed. No layout modifications required.

Q: What does ROHS3 Compliant mean, and why do some substitutes show RoHS non-compliant?

A: ROHS3 Compliant indicates the part meets Restriction of Hazardous Substances Directive 2011/65/EU requirements, restricting lead and other hazardous materials. RoHS non-compliant parts (TNPW0805402RFETA, TNPW0805402RFHTA) may contain restricted substances and are suitable only for military/aerospace applications exempt from commercial RoHS requirements. Verify program compliance before selection.

Q: Can I substitute the RN732ATTD4020F100 with a part having a different resistance value?

A: No. Resistance value must remain 402 Ohms. Substitution is limited to equivalent 402 Ohm parts only. Different resistance values require circuit redesign and are not considered substitutes.

Q: What is AEC-Q200 certification, and which substitutes include it?

A: AEC-Q200 is the automotive electronics council qualification standard for passive components in automotive applications. RN73R2ATTD4020F100 and TNPW0805402RFEEA carry this certification, confirming suitability for automotive temperature cycling, vibration, and reliability requirements. Select these parts for automotive designs.

Q: Why is the original RN732ATTD4020F100 marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory may be available, but long-term supply cannot be guaranteed. Active-status substitutes ensure design continuity and future procurement reliability. Migration to an active substitute is recommended for new designs or production quantities.

Q: Are there any electrical performance differences between KOA Speer, YAGEO, and Vishay thin film resistors?

A: All listed parts are thin film composition with ±1% tolerance and identical resistance values. Differences exist in temperature coefficient, power rating, and feature sets (automotive, military, anti-sulfur). Electrical performance in standard applications is equivalent. Selection should be based on specific application requirements (automotive, military, precision) and compliance needs (RoHS status).

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message