RK73B1HTTC300J Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC300J is a 30 Ohm ±5% 0.05W (1/20W) thick film chip resistor in 0201 (0603 Metric) package manufactured by KOA Speer Electronics, Inc. This component is rated for automotive applications under AEC-Q200 standard with operating temperature range of -55°C to 155°C. The part is currently classified as "Not For New Designs," indicating it has been superseded. Equivalent and substitute parts are necessary for ongoing production support, design flexibility, and supply chain continuity.

Key Parameters

Parameter	Value
Resistance	30 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
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the RK73B1HTTC300J is based on strict electrical and mechanical parameter matching:

Direct Equivalents (Same Specifications): Parts that maintain identical resistance (30 Ohms), tolerance (±5%), power rating (0.05W), package (0201), composition (Thick Film), temperature coefficient (±200ppm/°C), and RoHS3 compliance are classified as direct equivalents. These parts differ only in packaging format (Tape & Reel vs. Bulk) or manufacturer, but deliver identical electrical performance.

Compatible Substitutes (Equivalent Electrical Performance): Parts that match all critical electrical parameters (resistance, tolerance, power, temperature coefficient) and package specifications but may have different operating temperature ranges or feature sets (such as moisture resistance) are compatible substitutes. These maintain functional equivalence within the specified operating conditions.

Upgrade Options (Enhanced Tolerance): Parts with tighter tolerance specifications (±1% instead of ±5%) while maintaining all other parameters are classified as upgrades. These provide superior precision and can replace the original part with improved performance characteristics.

Key Parameters for Substitution Determination:

Resistance value: 30 Ohms (exact match required)
Tolerance: ±5% minimum (±1% acceptable as upgrade)
Power rating: 0.05W (exact match required)
Package: 0201 (0603 Metric) (exact match required)
Composition: Thick Film (exact match required)
Temperature coefficient: ±200ppm/°C (exact match required)
RoHS3 compliance (required for all substitutes)

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Op. Temp Range	AEC-Q200	Product Status	Packaging Type
RK73B1HTTC300J	KOA Speer	30Ω	±5%	0.05W	0201	±200ppm/°C	-55°C ~ 155°C	Yes	Not For New Designs	Tape & Reel
RK73B1HTTCM300J	KOA Speer	30Ω	±5%	0.05W	0201	±200ppm/°C	-55°C ~ 155°C	Yes	Active	Bulk
AC0201JR-0730RL	YAGEO	30Ω	±5%	0.05W	0201	±200ppm/°C	-55°C ~ 155°C	Yes	Active	Tape & Reel
CRCW020130R0JNED	Vishay Dale	30Ω	±5%	0.05W	0201	±200ppm/°C	-55°C ~ 155°C	No	Active	Tape & Reel
ERJ-1GNJ300C	Panasonic	30Ω	±5%	0.05W	0201	±200ppm/°C	-55°C ~ 125°C	No	Active	Tape & Reel
RC0201JR-0730RL	YAGEO	30Ω	±5%	0.05W	0201	±200ppm/°C	-55°C ~ 125°C	No	Active	Tape & Reel
CRCW020130R0FNED	Vishay Dale	30Ω	±1%	0.05W	0201	±200ppm/°C	-55°C ~ 155°C	No	Active	Tape & Reel
ERJ-1GEF30R0C	Panasonic	30Ω	±1%	0.05W	0201	±200ppm/°C	-55°C ~ 125°C	No	Obsolete	Cut Tape & Digi-Reel
ERJ-1GNF30R0C	Panasonic	30Ω	±1%	0.05W	0201	±200ppm/°C	-55°C ~ 125°C	No	Active	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement: RK73B1HTTCM300J (KOA Speer) is the manufacturer-recommended equivalent. It maintains identical electrical specifications, AEC-Q200 automotive rating, and extended operating temperature range (-55°C to 155°C) as the original RK73B1HTTC300J. The only difference is packaging format (Bulk vs. Tape & Reel). This part is currently Active and suitable for new designs.

Recommended Alternatives for Automotive Applications: AC0201JR-0730RL (YAGEO) provides direct electrical equivalence with AEC-Q200 certification, Active product status, and Tape & Reel packaging. This part maintains the full -55°C to 155°C operating temperature range and is suitable for automotive applications requiring AEC-Q200 compliance.

General-Purpose Alternatives: CRCW020130R0JNED (Vishay Dale) and ERJ-1GNJ300C (Panasonic) are electrically equivalent with identical resistance, tolerance, power rating, and temperature coefficient. However, these parts lack explicit AEC-Q200 automotive certification. CRCW020130R0JNED supports the full -55°C to 155°C temperature range, while ERJ-1GNJ300C is limited to -55°C to 125°C.

Precision Upgrade Options: CRCW020130R0FNED (Vishay Dale) and ERJ-1GNF30R0C (Panasonic) offer ±1% tolerance instead of ±5%, providing superior precision. Both maintain 0.05W power rating and ±200ppm/°C temperature coefficient. CRCW020130R0FNED supports -55°C to 155°C, while ERJ-1GNF30R0C is limited to -55°C to 125°C. ERJ-1GEF30R0C (Panasonic) is classified as Obsolete and should be avoided for new applications.

Selection Criteria Summary:

For automotive applications requiring AEC-Q200: Select RK73B1HTTCM300J or AC0201JR-0730RL
For extended temperature range (-55°C to 155°C): Select RK73B1HTTCM300J, AC0201JR-0730RL, or CRCW020130R0JNED
For precision requirements: Select CRCW020130R0FNED or ERJ-1GNF30R0C
Avoid obsolete parts: ERJ-1GEF30R0C

Frequently Asked Questions (FAQ)

Q: Can I use CRCW020130R0JNED as a direct replacement for RK73B1HTTC300J in automotive applications?

A: CRCW020130R0JNED matches all electrical parameters (30Ω, ±5%, 0.05W, 0201 package, ±200ppm/°C) and supports the full -55°C to 155°C temperature range. However, it lacks explicit AEC-Q200 automotive certification. Use only if your application does not require AEC-Q200 compliance. For automotive applications requiring AEC-Q200, select RK73B1HTTCM300J or AC0201JR-0730RL.

Q: What is the difference between RK73B1HTTC300J and RK73B1HTTCM300J?

A: Both parts are manufactured by KOA Speer and share identical electrical specifications: 30Ω ±5%, 0.05W, 0201 package, ±200ppm/°C temperature coefficient, -55°C to 155°C operating range, and AEC-Q200 certification. The primary difference is packaging: RK73B1HTTC300J is supplied in Tape & Reel format, while RK73B1HTTCM300J is supplied in Bulk format. RK73B1HTTCM300J has Active product status, making it suitable for new designs.

Q: Can I use a ±1% tolerance part instead of ±5%?

A: Yes. Parts with ±1% tolerance (CRCW020130R0FNED and ERJ-1GNF30R0C) are upgrades that provide superior precision while maintaining all other electrical parameters. They are electrically compatible and can replace ±5% parts. However, verify that your circuit design does not depend on the wider tolerance band of the original ±5% specification.

Q: Why do some substitutes have a lower maximum operating temperature (125°C vs. 155°C)?

A: Operating temperature range is a specified parameter that varies by manufacturer and product series. Parts limited to -55°C to 125°C (ERJ-1GNJ300C, RC0201JR-0730RL, ERJ-1GEF30R0C, ERJ-1GNF30R0C) are suitable for applications within this range. For applications requiring operation up to 155°C, select parts with the extended range: RK73B1HTTCM300J, AC0201JR-0730RL, or CRCW020130R0JNED.

Q: Is Tape & Reel packaging compatible with Bulk packaging?

A: Both packaging formats contain identical components. The difference is in delivery format: Tape & Reel is pre-formatted for automated pick-and-place assembly, while Bulk is supplied loose. From an electrical and mechanical standpoint, they are fully compatible. Select based on your assembly process requirements.

Q: What does "Not For New Designs" mean for RK73B1HTTC300J?

A: This status indicates the part has been superseded and is no longer recommended for new product designs. It remains available for existing production and support purposes. For new designs, use RK73B1HTTCM300J (Active status, same manufacturer) or other Active-status alternatives.

Q: Can I substitute ERJ-1GEF30R0C even though it is marked Obsolete?

A: ERJ-1GEF30R0C is classified as Obsolete and should not be used for new applications or ongoing production. While it meets electrical specifications, obsolete parts have limited availability and no manufacturer support. Select from Active-status alternatives instead.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference, including the main part RK73B1HTTC300J and all substitutes, are RoHS3 compliant. All parts have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling is required.

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