Equivalent & Substitute Parts for RK73G1HTTC1201D

Part Overview

The RK73G1HTTC1201D is a 1.2 kOhms ±0.5% chip resistor manufactured by KOA Speer Electronics, Inc., designed for automotive applications with AEC-Q200 qualification. This 0201 (0603 Metric) thick film resistor operates across -55°C to 155°C and dissipates 0.05W (1/20W). The part is currently classified as "Not For New Designs," making identification of active equivalent alternatives essential for ongoing production and maintenance applications requiring this specific resistance value and electrical performance.

Substiute Parts

RK73G1HTTC1201D

KOA Speer Electronics, Inc.In Stock: 1113RK73G1HTTC1201D Datasheet

Current PartRFQ

RK73G1HTTCM1201D

KOA Speer Electronics, Inc.In Stock: 817RK73G1HTTCM1201D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73G1HTTC1201D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 1.2 kOhms (exact match required)
• Tolerance: ±0.5% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)

Mechanical & Package Parameters:

• Package type: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Number of terminations: 2 (exact match required)

Compliance & Certification:

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

Substitute parts must match all parameters listed above. The primary distinction between the main part and its substitute is product status: the main part is "Not For New Designs," while active substitutes remain in production.

Parameter Comparison

Engineering Selection Recommendations

The RK73G1HTTCM1201D serves as the direct equivalent substitute for the RK73G1HTTC1201D. Both parts are manufactured by KOA Speer Electronics, Inc., within the RK73G series, and maintain identical electrical, mechanical, and compliance specifications. The substitute part differs only in product status classification: it is designated as "Active," whereas the main part is classified as "Not For New Designs."

For applications requiring the 1.2 kOhms ±0.5% 0.05W 0201 thick film resistor with AEC-Q200 automotive qualification, the RK73G1HTTCM1201D is the appropriate selection. Both parts satisfy ROHS3 compliance, MSL 1 moisture sensitivity, and operate across the identical -55°C to 155°C temperature range with ±50ppm/°C temperature coefficient.

Selection between these parts should be based on availability and procurement timeline. The substitute part's active status ensures continued manufacturability and supply chain support for future production requirements.

Frequently Asked Questions (FAQ)

Q: Can RK73G1HTTCM1201D replace RK73G1HTTC1201D in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same resistance value (1.2 kOhms), tolerance (±0.5%), power rating (0.05W), package (0201), temperature coefficient (±50ppm/°C), operating range (-55°C ~ 155°C), and AEC-Q200 automotive qualification. The substitute is suitable for direct replacement in any application using the main part.

Q: What is the significance of the product status difference?

A: The main part (RK73G1HTTC1201D) is marked "Not For New Designs," indicating it is in end-of-life phase. The substitute (RK73G1HTTCM1201D) is classified as "Active," meaning it remains in full production. For new designs and ongoing production, the active substitute is the recommended selection.

Q: Are there any package or footprint differences between these parts?

A: No. Both parts use the 0201 (0603 Metric) package with identical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). They are footprint-compatible and require no PCB layout modifications.

Q: Do both parts meet automotive compliance requirements?

A: Yes. Both the main part and substitute are AEC-Q200 qualified, ROHS3 compliant, and carry MSL 1 (Unlimited) moisture sensitivity rating. They are suitable for automotive applications requiring these certifications.

Q: What is the difference in the part numbers?

A: The part numbers differ only in the suffix: RK73G1HTTC1201D versus RK73G1HTTCM1201D. The "M" designation in the substitute part number indicates a variation within the same product family, but all electrical and mechanical specifications remain identical.

Q: Can I use either part interchangeably in my circuit?

A: Yes. From an engineering perspective, both parts are fully interchangeable. They deliver identical electrical performance, operate across the same temperature range, and meet the same compliance standards. Selection should be based on availability and supply chain considerations.