RK73H1HTTC40R2D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC40R2D is a 40.2 Ohm ±0.5% thick film chip resistor manufactured by KOA Speer Electronics, Inc. in the 0201 (0603 Metric) package format. This component is rated for 0.05W (1/20W) power dissipation and meets automotive AEC-Q200 qualification standards with moisture-resistant construction.

The RK73H1HTTC40R2D carries a product status designation of "Not For New Designs," indicating that KOA Speer Electronics has discontinued this variant for new applications. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support existing production requirements while transitioning to active product lines where applicable.

Substiute Parts

RK73H1HTTC40R2D

KOA Speer Electronics, Inc.In Stock: 906RK73H1HTTC40R2D Datasheet

Current PartRFQ

RK73H1HTTCM40R2D

KOA Speer Electronics, Inc.In Stock: 1126RK73H1HTTCM40R2D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC40R2D is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 40.2 Ohms
• Tolerance: ±0.5%
• Power rating: 0.05W (1/20W)
• Package format: 0201 (0603 Metric)
• Composition: Thick Film
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Automotive qualification: AEC-Q200
• Moisture sensitivity level: MSL 1 (Unlimited)
• RoHS compliance: ROHS3 Compliant

Parts meeting all these parameters are classified as direct electrical and mechanical equivalents. Substitution is valid when the replacement part maintains identical electrical performance characteristics and physical form factor compatibility.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM40R2D is a direct substitute for the RK73H1HTTC40R2D. Both components are manufactured by KOA Speer Electronics and share identical electrical specifications, mechanical dimensions, and compliance certifications.

The primary distinction between these parts is product status: the RK73H1HTTC40R2D is designated "Not For New Designs," while the RK73H1HTTCM40R2D maintains "Active" status. This status difference reflects KOA Speer Electronics' product lifecycle management and indicates that the RK73H1HTTCM40R2D represents the current production variant within the RK73H series.

For applications requiring the 40.2 Ohm ±0.5% 0.05W thick film resistor in 0201 package format with AEC-Q200 automotive qualification, the RK73H1HTTCM40R2D provides equivalent electrical performance and mechanical compatibility. Both parts satisfy ROHS3 compliance, MSL 1 moisture sensitivity requirements, and automotive temperature operating ranges from -55°C to 155°C.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM40R2D be used as a direct replacement for the RK73H1HTTC40R2D in existing designs?

A: Yes. The RK73H1HTTCM40R2D is electrically and mechanically equivalent to the RK73H1HTTC40R2D. Both components have identical resistance values (40.2 Ohms), tolerance (±0.5%), power rating (0.05W), package format (0201), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), and AEC-Q200 automotive qualification. Physical dimensions and termination count are identical.

Q: What is the significance of the "Not For New Designs" status on the RK73H1HTTC40R2D?

A: "Not For New Designs" indicates that KOA Speer Electronics has transitioned this specific part number to end-of-life status for new applications. The RK73H1HTTCM40R2D represents the active production equivalent. Existing designs using the RK73H1HTTC40R2D can transition to the RK73H1HTTCM40R2D without electrical or mechanical redesign.

Q: Are there any differences in moisture sensitivity or RoHS compliance between these parts?

A: No. Both the RK73H1HTTC40R2D and RK73H1HTTCM40R2D are classified as MSL 1 (Unlimited moisture sensitivity level) and are ROHS3 compliant. Moisture handling and storage requirements are identical.

Q: Can these 0201 package resistors be used interchangeably on the same PCB assembly?

A: Yes. Both parts share identical physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm) and maximum seated height (0.010" / 0.26mm). PCB footprints, solder pad layouts, and pick-and-place equipment settings require no modification.

Q: What is the temperature coefficient specification, and does it differ between these parts?

A: Both parts have a temperature coefficient of ±200ppm/°C. This specification defines the maximum change in resistance value per degree Celsius across the operating temperature range of -55°C to 155°C. No difference exists between the two part numbers.