RK73H1HTTC27R4D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC27R4D is a 27.4 Ohm ±0.5% 0.05W (1/20W) chip resistor in 0201 package (0603 Metric) manufactured by KOA Speer Electronics, Inc. This component features automotive AEC-Q200 qualification and moisture-resistant thick film construction, designed for high-reliability applications requiring precision resistance values in compact form factors.

The RK73H1HTTC27R4D carries a "Not For New Designs" product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support ongoing production of systems utilizing this component specification.

Substiute Parts

RK73H1HTTC27R4D

KOA Speer Electronics, Inc.In Stock: 890RK73H1HTTC27R4D Datasheet

Current PartRFQ

RK73H1HTTCM27R4D

KOA Speer Electronics, Inc.In Stock: 1248RK73H1HTTCM27R4D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC27R4D is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (27.4 Ohms), tolerance (±0.5%), and power rating (0.05W) must be identical. Temperature coefficient (±200ppm/°C) and operating temperature range (-55°C ~ 155°C) establish thermal performance boundaries.

Mechanical Parameters: Package type (0201 / 0603 Metric) and physical dimensions (0.024" L x 0.012" W, 0.60mm x 0.30mm) ensure PCB compatibility and assembly process compatibility.

Compliance Parameters: AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating are mandatory for equivalent substitution in automotive and high-reliability applications.

Material & Construction: Thick film composition and moisture-resistant construction must be maintained.

Substitute parts must match all parameters listed above. Parts differing in any of these specifications are not equivalent and require full design re-qualification.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM27R4D is the direct equivalent substitute for the RK73H1HTTC27R4D. Both components are manufactured by KOA Speer Electronics, Inc. within the RK73H series and share identical electrical, mechanical, and compliance specifications.

The primary distinction is product status: the main part (RK73H1HTTC27R4D) is designated "Not For New Designs," while the substitute (RK73H1HTTCM27R4D) maintains "Active" status. This status difference reflects manufacturing lifecycle management and does not indicate functional or performance differences between the two parts.

Both parts satisfy AEC-Q200 automotive qualification requirements, ROHS3 compliance, and MSL 1 moisture sensitivity rating. Selection between these parts should be based on supply chain availability and design phase requirements. For ongoing production of existing designs, either part is functionally interchangeable. For new design implementations, the Active-status substitute is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM27R4D be used as a direct replacement for RK73H1HTTC27R4D in existing designs?

A: Yes. Both parts are electrically and mechanically identical with matching resistance (27.4 Ohms ±0.5%), power rating (0.05W), package (0201), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and AEC-Q200 qualification. No design modification is required.

Q: What does "Not For New Designs" status mean for the RK73H1HTTC27R4D?

A: This designation indicates the part has reached end-of-life in the manufacturer's product portfolio. While existing inventory remains available and the part continues to function to specification, new design implementations should utilize the Active-status equivalent (RK73H1HTTCM27R4D) to ensure long-term supply continuity.

Q: Are there any differences in packaging or handling between these two parts?

A: Both parts share identical physical dimensions (0.024" L x 0.012" W, 0.60mm x 0.30mm), height (0.010" max), and MSL 1 rating. Handling, storage, and assembly processes are identical.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both RK73H1HTTC27R4D and RK73H1HTTCM27R4D carry AEC-Q200 automotive qualification and are suitable for automotive and high-reliability applications.

Q: What is the tolerance specification for these resistors?

A: Both parts are specified at ±0.5% tolerance, providing precision resistance values suitable for applications requiring tight tolerance control.

Q: Are these parts RoHS compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and automotive applications.