Equivalent & Substitute Parts for RK73H1HTTC35R7D

Part Overview

The RK73H1HTTC35R7D is a 35.7 Ohm ±0.5% thick film chip resistor manufactured by KOA Speer Electronics, Inc. in 0201 package format with 0.05W power rating. This component is rated for automotive applications under AEC-Q200 standard and features moisture-resistant construction suitable for harsh operating environments.

The RK73H1HTTC35R7D carries a product status of "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identification of equivalent substitute parts is necessary for ongoing support of existing designs, legacy system maintenance, and procurement continuity where original components are no longer actively produced.

Substiute Parts

RK73H1HTTC35R7D

KOA Speer Electronics, Inc.In Stock: 1089RK73H1HTTC35R7D Datasheet

Current PartRFQ

RK73H1HTTCM35R7D

KOA Speer Electronics, Inc.In Stock: 940RK73H1HTTCM35R7D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC35R7D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 35.7 Ohms (exact match required)
• Tolerance: ±0.5% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C to 155°C (exact match required)

Mechanical & Package Parameters:

• Package format: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Number of terminations: 2 (exact match required)
• Physical dimensions: 0.024" L x 0.012" W / 0.60mm x 0.30mm (exact match required)
• Height seated maximum: 0.010" / 0.26mm (exact match required)

Compliance & Certification Parameters:

• Automotive rating: AEC-Q200 (exact match required)
• RoHS status: ROHS3 Compliant (exact match required)
• Moisture sensitivity level: MSL 1 (exact match required)
• REACH status: REACH Unaffected (exact match required)

Substitute parts must match all parameters listed above. Deviations in any electrical, mechanical, or compliance parameter disqualify a component from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM35R7D is a direct functional equivalent to the RK73H1HTTC35R7D. Both components are manufactured by KOA Speer Electronics, Inc. within the RK73H series and share identical electrical specifications, mechanical dimensions, and compliance certifications.

The primary distinction between these parts is product lifecycle status. The RK73H1HTTC35R7D is designated "Not For New Designs," while the RK73H1HTTCM35R7D maintains "Active" status. This indicates the RK73H1HTTCM35R7D represents the current production equivalent within the manufacturer's active product portfolio.

Both components satisfy AEC-Q200 automotive qualification requirements, ROHS3 compliance, and MSL 1 moisture sensitivity classification. Selection between these parts should be based on procurement availability and design phase requirements. For legacy system support and maintenance applications, either component provides equivalent electrical and mechanical performance. For new design implementations, the active-status RK73H1HTTCM35R7D is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM35R7D be used as a direct replacement for RK73H1HTTC35R7D in existing assemblies?

A: Yes. The RK73H1HTTCM35R7D is electrically and mechanically equivalent to the RK73H1HTTC35R7D. Both components share identical resistance values (35.7 Ohms), tolerance (±0.5%), power rating (0.05W), package format (0201), and all compliance certifications. Direct substitution is supported without circuit redesign or board layout modification.

Q: What is the significance of the "Not For New Designs" status on the RK73H1HTTC35R7D?

A: "Not For New Designs" indicates the manufacturer has transitioned this component to end-of-life status and no longer recommends its use in new product development. The RK73H1HTTCM35R7D serves as the active replacement. Existing designs using the RK73H1HTTC35R7D may continue operation, but new designs should specify the RK73H1HTTCM35R7D.

Q: Are there any differences in the 0201 package dimensions between these two parts?

A: No. Both components are packaged in 0201 format (0603 Metric) with identical physical dimensions: 0.024" length x 0.012" width (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). PCB footprints and assembly processes are interchangeable.

Q: Do both parts meet automotive AEC-Q200 qualification?

A: Yes. Both the RK73H1HTTC35R7D and RK73H1HTTCM35R7D are rated to AEC-Q200 standard for automotive applications. Both components are suitable for use in automotive circuits requiring qualified component status.

Q: What is the moisture sensitivity level for these resistors?

A: Both components are classified as MSL 1 (Unlimited), indicating unlimited shelf life without moisture bake requirements. These components do not require special moisture control during storage or handling.

Q: Are these parts RoHS compliant?

A: Yes. Both components are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.