Equivalent & Substitute Parts for RK73G1HTTC5103D

Part Overview

The RK73G1HTTC5103D is a 510 kOhms ±0.5% thick film chip resistor manufactured by KOA Speer Electronics, Inc., designed for automotive applications with AEC-Q200 qualification. This 0201 package (0603 metric) resistor delivers 0.05W power rating with a temperature coefficient of ±50ppm/°C and operates across -55°C to 155°C.

The main part carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's active product line. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for existing applications or legacy system maintenance.

Substiute Parts

RK73G1HTTC5103D

KOA Speer Electronics, Inc.In Stock: 1154RK73G1HTTC5103D Datasheet

Current PartRFQ

RK73G1HTTCM5103D

KOA Speer Electronics, Inc.In Stock: 910RK73G1HTTCM5103D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73G1HTTC5103D is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 510 kOhms (exact match required)
• Tolerance: ±0.5% (precision class must be maintained)
• Power rating: 0.05W minimum (thermal capability)
• Package: 0201 (0603 Metric) (PCB footprint compatibility)
• Composition: Thick Film (electrical performance characteristics)
• Temperature coefficient: ±50ppm/°C (temperature stability)
• Operating temperature range: -55°C ~ 155°C (environmental specification)
• Automotive rating: AEC-Q200 (qualification standard)
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

Substitute parts must satisfy all nine parameters without deviation. Parts meeting these criteria are classified as direct functional equivalents suitable for one-to-one replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

RK73G1HTTCM5103D is the qualified substitute for RK73G1HTTC5103D based on the following engineering criteria:

Compliance and Status: The substitute part RK73G1HTTCM5103D carries "Active" product status, indicating ongoing manufacturer support and availability. The original part RK73G1HTTC5103D is designated "Not For New Designs," making the active substitute the appropriate selection for design continuity and long-term supply assurance.

Electrical and Mechanical Equivalence: All critical electrical parameters—resistance value, tolerance, power rating, temperature coefficient, and operating temperature range—are identical between the main part and substitute. Physical dimensions, package configuration, and termination count match exactly, ensuring PCB-level compatibility without layout modification.

Automotive and Regulatory Compliance: Both parts maintain AEC-Q200 automotive qualification, ROHS3 compliance, and REACH unaffected status. Moisture sensitivity level remains at MSL 1 (Unlimited), indicating no special handling requirements during storage or assembly.

Supply Chain Consideration: Current inventory shows 859 units of the substitute part in stock compared to 1131 units of the obsolete part. The substitute's active status ensures continued availability for future procurement cycles.

Frequently Asked Questions (FAQ)

Q: Can RK73G1HTTCM5103D replace RK73G1HTTC5103D in existing designs without modification?

A: Yes. The substitute part is electrically and mechanically identical across all specified parameters. No circuit redesign, PCB layout changes, or component requalification is required. Direct one-to-one replacement is supported.

Q: What is the difference between these two part numbers?

A: The parts differ only in product lifecycle status. RK73G1HTTC5103D is designated "Not For New Designs," while RK73G1HTTCM5103D is "Active." The "M" designation in the substitute part number indicates the active variant within the RK73G series. All electrical and mechanical specifications are identical.

Q: Are both parts suitable for automotive applications?

A: Yes. Both parts carry AEC-Q200 automotive qualification and operate across the -55°C to 155°C temperature range required for automotive environments. Compliance with ROHS3 and REACH regulations is maintained in both variants.

Q: Does the 0201 package size remain the same?

A: Yes. Both parts use the 0201 package (0603 metric equivalent), with identical dimensions of 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). PCB footprints are fully compatible.

Q: What is the tolerance specification, and does it affect circuit performance?

A: Both parts maintain ±0.5% tolerance on the 510 kOhms resistance value. This precision class ensures stable circuit performance across the specified operating temperature range with a temperature coefficient of ±50ppm/°C.

Q: Is special handling required for either part during assembly?

A: No. Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related storage or handling restrictions. Standard PCB assembly processes apply.

Q: Which part should be specified for new procurement?

A: RK73G1HTTCM5103D should be specified for new procurement due to its active product status and ongoing manufacturer support. This ensures supply chain continuity and eliminates obsolescence risk.