RK73B1HTTC431J Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC431J is a 430 Ohm ±5% thick film chip resistor rated at 0.05W (1/20W) in 0201 package format (0.60mm x 0.30mm metric). Manufactured by KOA Speer Electronics, Inc., this component is qualified to AEC-Q200 automotive standards and complies with ROHS3 and REACH regulations. The part is designated as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identification of equivalent and substitute parts is necessary for ongoing support of existing designs, inventory management, and sourcing optimization across multiple manufacturers.

Key Parameters

Parameter	Value
Resistance	430 Ohms
Tolerance	±5%
Power Rating	0.05W (1/20W)
Package / Case	0201 (0603 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Size / Dimension	0.024" L x 0.012" W (0.60mm x 0.30mm)
Height - Seated (Max)	0.010" (0.26mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC431J is determined by strict equivalence in the following parameters:

Critical Parameters for Direct Substitution:

Resistance value: 430 Ohms
Tolerance: ±5% (minimum requirement)
Power rating: 0.05W (1/20W)
Package: 0201 (0603 Metric)
Physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm)
Composition: Thick Film
Operating temperature range: -55°C ~ 155°C (minimum)
RoHS3 compliance
Moisture Sensitivity Level: 1

Upgrade Parameters: Parts with ±1% tolerance represent an upgrade path, offering improved tolerance performance while maintaining all other critical specifications. These parts are electrically and mechanically interchangeable with the original specification.

Packaging Consideration: The original part is supplied in Tape & Reel (TR) packaging. The manufacturer-recommended substitute RK73B1HTTCM431J is supplied in Bulk packaging; this represents a packaging format change only and does not affect electrical or mechanical compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Packaging	Product Status	Inventory (Pcs)
RK73B1HTTC431J	KOA Speer	430 Ω	±5%	0.05	±200	-55 ~ 155	Tape & Reel	Not For New Designs	1005
RK73B1HTTCM431J	KOA Speer	430 Ω	±5%	0.05	±200	-55 ~ 155	Bulk	Active	921
AC0201JR-07430RL	YAGEO	430 Ω	±5%	0.05	±200	-55 ~ 155	Tape & Reel	Active	961
CRCW0201430RJNED	Vishay Dale	430 Ω	±5%	0.05	±200	-55 ~ 155	Tape & Reel	Active	716
ERJ-1GNJ431C	Panasonic	430 Ω	±5%	0.05	±200	-55 ~ 125	Tape & Reel	Active	63541
CRCW0201430RFKED	Vishay Dale	430 Ω	±1%	0.05	±100	-55 ~ 155	Tape & Reel	Active	10914
CRCW0201430RFNED	Vishay Dale	430 Ω	±1%	0.05	±200	-55 ~ 155	Tape & Reel	Active	20382
ERJ-1GNF4300C	Panasonic	430 Ω	±1%	0.05	±200	-55 ~ 125	Tape & Reel	Active	99309

Engineering Selection Recommendations

Direct Equivalent (Same Tolerance):

The RK73B1HTTCM431J from KOA Speer Electronics is the manufacturer-recommended equivalent. It maintains identical electrical specifications (430 Ω ±5%, 0.05W, ±200ppm/°C) and operating temperature range (-55°C ~ 155°C). The only difference is packaging format (Bulk vs. Tape & Reel). This part carries Active product status and is suitable for new designs.

For applications requiring Tape & Reel packaging with ±5% tolerance, the AC0201JR-07430RL (YAGEO), CRCW0201430RJNED (Vishay Dale), and ERJ-1GNJ431C (Panasonic) are direct electrical and mechanical equivalents. All three maintain the 430 Ω ±5% specification, 0.05W power rating, and 0201 package format. All are ROHS3 compliant with MSL 1 rating.

Upgrade Options (±1% Tolerance):

The CRCW0201430RFKED, CRCW0201430RFNED (Vishay Dale), and ERJ-1GNF4300C (Panasonic) offer improved tolerance performance at ±1%. These parts are electrically and mechanically interchangeable with the original specification while providing tighter resistance tolerance. CRCW0201430RFKED additionally features reduced temperature coefficient (±100ppm/°C vs. ±200ppm/°C).

Temperature Range Consideration:

Panasonic parts (ERJ-1GNJ431C and ERJ-1GNF4300C) specify an operating temperature range of -55°C ~ 125°C, which is narrower than the original specification of -55°C ~ 155°C. Selection of Panasonic alternatives is appropriate only for applications where the upper operating temperature does not exceed 125°C.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, ensuring regulatory and environmental compatibility with the original component.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RK73B1HTTC431J with a ±1% tolerance part?

A: Yes. Parts with ±1% tolerance (CRCW0201430RFKED, CRCW0201430RFNED, ERJ-1GNF4300C) are electrically and mechanically interchangeable. The ±1% tolerance is a tighter specification than the original ±5%, making these parts suitable for applications requiring improved tolerance performance. No circuit redesign is required.

Q: What is the difference between Tape & Reel and Bulk packaging?

A: Tape & Reel (TR) packaging is used for automated assembly processes, with components wound on a continuous tape. Bulk packaging contains loose components. Both formats contain identical components; the difference is in handling and assembly method. The RK73B1HTTCM431J (Bulk) is electrically identical to the RK73B1HTTC431J (Tape & Reel).

Q: Are Panasonic ERJ-1GN series parts compatible with my design?

A: The ERJ-1GNJ431C and ERJ-1GNF4300C are mechanically and electrically compatible with the original part. However, these parts specify an operating temperature range of -55°C ~ 125°C, compared to the original -55°C ~ 155°C. Verify that your application does not require operation above 125°C before selecting Panasonic alternatives.

Q: Can I use YAGEO AC0201JR-07430RL as a direct replacement?

A: Yes. The AC0201JR-07430RL is a direct equivalent with identical electrical specifications (430 Ω ±5%, 0.05W, ±200ppm/°C), operating temperature range (-55°C ~ 155°C), and 0201 package format. It is ROHS3 compliant and carries Active product status.

Q: What does "Not For New Designs" mean for the original part?

A: This designation indicates that the RK73B1HTTC431J has been superseded by the manufacturer and is no longer recommended for new product development. However, it remains available for ongoing support of existing designs. For new designs, select from the Active status alternatives listed in this reference.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant and REACH unaffected, maintaining regulatory compatibility with the original component.

Q: What is the significance of temperature coefficient differences?

A: Temperature coefficient indicates how much the resistance value changes with temperature. The original part and most substitutes specify ±200ppm/°C. The CRCW0201430RFKED offers an improved ±100ppm/°C specification, resulting in more stable resistance across the operating temperature range. This upgrade is beneficial for precision applications but not required for general-purpose use.

Q: Can I mix different manufacturers' parts in the same assembly?

A: Yes. All substitute parts meet identical electrical and mechanical specifications for the 430 Ω ±5% (or ±1% upgrade) 0201 package resistor. Parts from KOA Speer, YAGEO, Vishay Dale, and Panasonic are interchangeable within the constraints of their specified operating temperature ranges.

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