Equivalent & Substitute Parts for RK73B1HTTC621G

Part Overview

The RK73B1HTTC621G is a 620 Ohm ±2% thick film chip resistor rated at 0.05W (1/20W) in the 0201 (0603 Metric) package. This component is manufactured by KOA Speer Electronics, Inc. and complies with automotive AEC-Q200 standards. The part is currently classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. Identifying equivalent substitute parts is necessary for ongoing support of existing designs, inventory management, and ensuring continued availability of functionally compatible components.

Substiute Parts

RK73B1HTTC621G

KOA Speer Electronics, Inc.In Stock: 973RK73B1HTTC621G Datasheet

Current PartRFQ

RK73B1HTTCM621G

KOA Speer Electronics, Inc.In Stock: 1108RK73B1HTTCM621G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC621G is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 620 Ohms (exact match required)
• Tolerance: ±2% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)

Mechanical Parameters:

• Package type: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)

Compliance Parameters:

• Automotive AEC-Q200 certification (required for automotive applications)
• RoHS3 compliance (required for regulatory adherence)
• Moisture Sensitivity Level 1 (required for storage and handling compatibility)

Only components meeting all of these criteria are considered direct substitutes. The RK73B1HTTCM621G satisfies all substitution requirements.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM621G is the direct substitute for the RK73B1HTTC621G. Both components are manufactured by KOA Speer Electronics, Inc. within the RK73B series and share identical electrical, mechanical, and compliance specifications.

The primary distinction is product lifecycle status: the original part (RK73B1HTTC621G) is designated "Not For New Designs," while the substitute (RK73B1HTTCM621G) maintains "Active" status. This indicates that RK73B1HTTCM621G is the current production equivalent and the recommended selection for ongoing applications.

Both parts maintain full AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating, ensuring compatibility with existing design requirements and regulatory obligations. The substitute part is suitable for direct replacement in all applications where the original part was specified.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM621G be used as a direct replacement for RK73B1HTTC621G?

A: Yes. Both parts are electrically and mechanically identical with matching resistance (620 Ohms ±2%), power rating (0.05W), package (0201), temperature coefficient (±200ppm/°C), and operating range (-55°C ~ 155°C). Both carry AEC-Q200 automotive certification and ROHS3 compliance.

Q: What is the difference between these two part numbers?

A: The primary difference is product status. RK73B1HTTC621G is classified as "Not For New Designs," while RK73B1HTTCM621G is Active. The substitute represents the current production equivalent within the same RK73B series.

Q: Are there any package or footprint differences?

A: No. Both parts use the identical 0201 (0603 Metric) package with matching dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm) and maximum seated height (0.010" / 0.26mm). PCB footprints are interchangeable.

Q: Do both parts meet automotive standards?

A: Yes. Both components are AEC-Q200 qualified for automotive applications and maintain ROHS3 compliance with MSL 1 rating.

Q: Which part should be specified for new designs?

A: RK73B1HTTCM621G should be specified for new designs, as it maintains Active product status. The original part number is not recommended for new design implementations.