RN731ETTP4530F50 Equivalent & Substitute Parts

Part Overview

The RN731ETTP4530F50 is a 453 Ohm ±1% thin film chip resistor in 0402 (1005 Metric) package rated at 0.063W (1/16W) power dissipation. Manufactured by KOA Speer Electronics, Inc., this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary to ensure design continuity and supply chain reliability for new production runs and long-term availability.

Key Parameters

Parameter	Value
Resistance	453 Ohms
Tolerance	±1%
Power Rating	0.063W (1/16W)
Package / Case	0402 (1005 Metric)
Composition	Thin Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C to 155°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following core parameters:

Resistance value: 453 Ohms (exact match required)
Package / Case: 0402 (1005 Metric) (exact match required)
Composition: Thin Film (exact match required)
Operating Temperature Range: -55°C to 155°C (minimum requirement)
Moisture Sensitivity Level: 1 (Unlimited) (minimum requirement)
RoHS Status: ROHS3 Compliant (minimum requirement)

Tolerance, power rating, temperature coefficient, and additional features (automotive qualification, anti-sulfur properties) may vary in substitute parts. Parts with tighter tolerance, higher power rating, or enhanced features are classified as upgrades. Parts with identical or relaxed specifications are classified as direct equivalents.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Temp Coeff (ppm/°C)	Operating Temp	Features	Product Status
RN731ETTP4530F50	KOA Speer Electronics, Inc.	453 Ohms	±1%	0.063W	±50	-55°C ~ 155°C	Moisture Resistant	Obsolete
RN73R1ETTP4530F50	KOA Speer Electronics, Inc.	453 Ohms	±1%	0.063W	±50	-55°C ~ 155°C	Automotive AEC-Q200, Moisture Resistant	Active
RT0402FRE07453RL	YAGEO	453 Ohms	±1%	0.063W	±50	-55°C ~ 155°C	—	Active
AT0402DRE07453RL	YAGEO	453 Ohms	±0.5%	0.063W	±50	-55°C ~ 155°C	Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant	Active
MCS04020C4530FE000	Vishay Beyschlag/Draloric/BC Components	453 Ohms	±1%	0.063W	±50	-55°C ~ 155°C	Anti-Sulfur	Active
RNCF0402BTC453R	Stackpole Electronics Inc	453 Ohms	±0.1%	0.1W	±50	-55°C ~ 155°C	Automotive AEC-Q200	Active
RNCF0402DTC453R	Stackpole Electronics Inc	453 Ohms	±0.5%	0.1W	±50	-55°C ~ 155°C	Automotive AEC-Q200	Active
RT0402BRE07453RL	YAGEO	453 Ohms	±0.1%	0.063W	±50	-55°C ~ 155°C	—	Active
RT0402CRE07453RL	YAGEO	453 Ohms	±0.25%	0.063W	±50	-55°C ~ 155°C	—	Active
RT0402DRE07453RL	YAGEO	453 Ohms	±0.5%	0.063W	±50	-55°C ~ 155°C	—	Active
RT0402FRD07453RL	YAGEO	453 Ohms	±1%	0.063W	±25	-55°C ~ 155°C	—	Active

Engineering Selection Recommendations

Direct Equivalent (Active Status): RN73R1ETTP4530F50 from KOA Speer Electronics, Inc. is the direct active equivalent. It maintains identical electrical specifications (453 Ohms ±1%, 0.063W, ±50ppm/°C) and package configuration while adding automotive AEC-Q200 qualification. This part is recommended as the primary replacement due to manufacturer continuity and enhanced qualification status.

Standard Alternatives (Active Status, Identical Specifications): RT0402FRE07453RL (YAGEO) and MCS04020C4530FE000 (Vishay Beyschlag/Draloric/BC Components) are functionally equivalent alternatives. Both maintain the 453 Ohms ±1% tolerance, 0.063W power rating, and ±50ppm/°C temperature coefficient. These parts are suitable for direct substitution in applications where the original manufacturer is not a requirement.

Upgraded Alternatives (Enhanced Tolerance or Power Rating): Parts with tighter tolerance specifications (±0.1%, ±0.25%, ±0.5%) or higher power ratings (0.1W) are available from YAGEO (RT series) and Stackpole Electronics Inc (RNCF series). These upgrades provide improved performance margins and are suitable for applications requiring higher precision or thermal headroom. Automotive AEC-Q200 qualified options (AT0402DRE07453RL, RNCF0402BTC453R, RNCF0402DTC453R) are available for automotive and harsh environment applications.

Temperature Coefficient Consideration: RT0402FRD07453RL features a ±25ppm/°C temperature coefficient, which is superior to the original ±50ppm/°C specification. This part is suitable for temperature-sensitive applications requiring improved stability.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different tolerance? A: Yes. The original RN731ETTP4530F50 specifies ±1% tolerance. Substitute parts with tighter tolerance (±0.1%, ±0.25%, ±0.5%) are fully compatible and provide improved accuracy. Parts with relaxed tolerance are not recommended.

Q: What is the difference between the 0402 package height specifications? A: The original part specifies a maximum seated height of 0.016" (0.40mm). Most substitute parts specify 0.014" (0.35mm) or 0.015" (0.37mm), which are within acceptable PCB assembly tolerances. Verify with your assembly process specifications if height clearance is critical.

Q: Are automotive-qualified parts (AEC-Q200) compatible with non-automotive applications? A: Yes. Automotive-qualified parts exceed standard reliability requirements and are fully compatible with non-automotive applications. They provide enhanced reliability margins at no functional penalty.

Q: Can I substitute a 0.1W (1/10W) rated part for the original 0.063W (1/16W) specification? A: Yes. Higher power-rated parts (RNCF0402BTC453R, RNCF0402DTC453R at 0.1W) are fully compatible and provide additional thermal margin. This is a safe upgrade for applications where power dissipation headroom is beneficial.

Q: What does "Anti-Sulfur" feature mean? A: Anti-sulfur coating protects the resistor from corrosion in high-sulfur environments. This feature is optional for standard applications but recommended for industrial or marine environments.

Q: Is the temperature coefficient difference between ±50ppm/°C and ±25ppm/°C significant? A: The ±25ppm/°C specification (RT0402FRD07453RL) provides superior temperature stability, resulting in lower resistance drift across the -55°C to 155°C operating range. This is beneficial for precision analog circuits and temperature-sensitive applications.

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