RK73B1HTTC433G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC433G is a 43 kOhm ±2% thick film chip resistor rated at 0.05W (1/20W) in 0201 package format (0.60mm x 0.30mm metric). This component is manufactured by KOA Speer Electronics, Inc. and meets automotive AEC-Q200 qualification standards. The part is currently classified as "Not For New Designs," necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for ongoing production and maintenance applications.

Substiute Parts

RK73B1HTTC433G

KOA Speer Electronics, Inc.In Stock: 744RK73B1HTTC433G Datasheet

Current PartRFQ

RK73B1HTTCM433G

KOA Speer Electronics, Inc.In Stock: 1234RK73B1HTTCM433G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC433G is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Resistance value (43 kOhms), tolerance (±2%), power rating (0.05W), temperature coefficient (±200ppm/°C), and operating temperature range (-55°C ~ 155°C) must be identical.

Mechanical Specifications: Package format (0201 / 0603 Metric), physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm), and seated height (0.010" / 0.26mm maximum) must match exactly.

Composition & Construction: Thick film technology and two-termination configuration are required.

Compliance & Ratings: AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating must be maintained.

Substitute parts must originate from the same manufacturer series (RK73B) to ensure process consistency and reliability equivalence.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM433G is the direct equivalent substitute for the RK73B1HTTC433G. Both components are manufactured by KOA Speer Electronics, Inc. within the RK73B series and maintain identical electrical, mechanical, and compliance specifications.

The primary distinction is product status: the original part (RK73B1HTTC433G) is designated "Not For New Designs," while the substitute (RK73B1HTTCM433G) maintains "Active" status. This status change reflects manufacturing lifecycle management and does not indicate any technical deficiency in the original part.

Both parts satisfy AEC-Q200 automotive qualification requirements, ROHS3 compliance, and MSL 1 moisture sensitivity classification. Selection between these parts should be based on availability and supply chain requirements rather than technical performance considerations.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM433G be used as a direct replacement for RK73B1HTTC433G in existing designs?

A: Yes. Both parts are electrically and mechanically identical with matching resistance (43 kOhms ±2%), power rating (0.05W), package format (0201), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and AEC-Q200 automotive qualification. No circuit redesign or validation is required.

Q: What is the significance of the "Not For New Designs" status on the original part?

A: This designation indicates the part has reached end-of-life in the manufacturer's product portfolio. Existing inventory remains available and functional, but new designs should utilize the active equivalent (RK73B1HTTCM433G) to ensure long-term supply continuity.

Q: Are there any packaging differences between these parts?

A: Both parts use identical 0201 (0603 Metric) package format with matching physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm) and seated height (0.010" / 0.26mm maximum). Packaging is fully interchangeable.

Q: Do both parts meet the same compliance standards?

A: Yes. Both RK73B1HTTC433G and RK73B1HTTCM433G are ROHS3 compliant, REACH unaffected, and carry AEC-Q200 automotive qualification with MSL 1 moisture sensitivity rating.

Q: What determines substitution eligibility for 0201 chip resistors?

A: Substitution requires exact matching of resistance value, tolerance, power rating, temperature coefficient, operating temperature range, package format, composition (thick film), and compliance certifications. Any deviation in these parameters disqualifies a part as a direct equivalent.