RK73B1HTTC513G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC513G is a 51 kOhms ±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 The part is currently classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to active product alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

RK73B1HTTC513G

KOA Speer Electronics, Inc.In Stock: 1074RK73B1HTTC513G Datasheet

Current PartRFQ

RK73B1HTTCM513G

KOA Speer Electronics, Inc.In Stock: 950RK73B1HTTCM513G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC513G is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 51 kOhms (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 format: 0201 (0603 Metric) (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)
• Termination count: 2 (exact match required)

Compliance & Certification:

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

Substitute parts must match all electrical, mechanical, and compliance parameters without exception. Composition (thick film) and series designation (RK73B) serve as additional confirmation of functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM513G is the direct substitute for RK73B1HTTC513G. Both parts are manufactured by KOA Speer Electronics, Inc. and share identical electrical specifications, mechanical dimensions, and compliance certifications. The primary distinction is product lifecycle status: the original part is designated "Not For New Designs," while the substitute is classified as "Active."

For new design implementations, the RK73B1HTTCM513G should be selected to ensure long-term supply chain continuity and manufacturer support. For existing designs currently using RK73B1HTTC513G, the substitute provides drop-in compatibility without circuit redesign or re-qualification requirements, as all functional parameters remain unchanged.

Both parts maintain AEC-Q200 automotive qualification and ROHS3 compliance, ensuring regulatory and quality standards are preserved across the substitution.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM513G be used as a direct replacement for RK73B1HTTC513G in existing designs?

A: Yes. The substitute part is electrically and mechanically identical. All resistance, tolerance, power rating, temperature coefficient, operating temperature range, package dimensions, and compliance certifications match exactly. No circuit modifications or re-testing are required for substitution.

Q: Why is the original part marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life in the manufacturer's product portfolio. The substitute RK73B1HTTCM513G is the active replacement and should be used for all new design implementations to ensure ongoing availability and manufacturer support.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both parts are packaged in 0201 format (0603 metric) with dimensions of 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). They are mechanically interchangeable on PCB layouts.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both RK73B1HTTC513G and RK73B1HTTCM513G are qualified to AEC-Q200 automotive standards and are ROHS3 compliant. They are suitable for automotive applications without additional qualification.

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

A: Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating they require no special moisture control during storage, handling, or assembly. Standard component storage conditions are sufficient.

Q: Are there any differences in electrical performance between the two parts?

A: No. Both parts have identical resistance (51 kOhms), tolerance (±2%), power rating (0.05W), temperature coefficient (±200ppm/°C), and operating temperature range (-55°C ~ 155°C). Electrical performance is equivalent.