RK73B1HTTC123G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC123G is a 12 kOhms ±2% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated for 0.05W (1/20W) power dissipation in a 0201 (0603 Metric) surface mount package. This component is designed for automotive applications and meets AEC-Q200 qualification standards. The part is currently classified as Not For New Designs, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for ongoing production and maintenance applications.

Substiute Parts

RK73B1HTTC123G

KOA Speer Electronics, Inc.In Stock: 836RK73B1HTTC123G Datasheet

Current PartRFQ

RK73B1HTTCM123G

KOA Speer Electronics, Inc.In Stock: 1084RK73B1HTTCM123G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC123G is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Resistance value (12 kOhms), tolerance (±2%), power rating (0.05W), temperature coefficient (±200ppm/°C), and operating temperature range (-55°C ~ 155°C) must be identical.

Package Specifications: Physical package designation (0201 / 0603 Metric), size dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm), and seated height (0.010" / 0.26mm maximum) must match exactly.

Composition & Construction: Thick film technology and two-termination configuration are required.

Compliance & Ratings: AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating must be maintained.

Parts meeting all these criteria are classified as direct electrical and mechanical equivalents suitable for component replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM123G is the direct equivalent substitute for the RK73B1HTTC123G. Both components are manufactured by KOA Speer Electronics, Inc., within the RK73B series, and maintain identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the original part number is classified as Not For New Designs, while the substitute part number RK73B1HTTCM123G carries Active status, indicating current manufacturing availability and suitability for ongoing production applications.

Both parts satisfy AEC-Q200 automotive qualification requirements, ROHS3 environmental compliance, and MSL 1 moisture sensitivity classification. The electrical performance, including 12 kOhms resistance, ±2% tolerance, ±200ppm/°C temperature coefficient, and -55°C to 155°C operating range, is identical between the two part numbers. Physical package dimensions and termination configuration are equivalent, ensuring direct mechanical compatibility in existing PCB layouts.

Selection of RK73B1HTTCM123G is appropriate for new production builds, design refreshes, and component replenishment where the original part number is no longer available through standard procurement channels.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM123G be used as a direct replacement for RK73B1HTTC123G in existing designs?

A: Yes. Both part numbers are electrically and mechanically equivalent. The RK73B1HTTCM123G maintains identical resistance (12 kOhms), tolerance (±2%), power rating (0.05W), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), package dimensions (0201 / 0603 Metric), and AEC-Q200 automotive qualification. Direct substitution is supported without circuit redesign or PCB layout modification.

Q: What is the significance of the product status difference between these part numbers?

A: The RK73B1HTTC123G is classified as Not For New Designs, indicating that KOA Speer Electronics, Inc., has transitioned this part number out of active production. The RK73B1HTTCM123G carries Active status, confirming current manufacturing and availability through authorized distribution channels. For ongoing production and new applications, the Active part number should be specified.

Q: Are there any compliance or certification differences between these parts?

A: No. Both part numbers maintain identical compliance certifications: AEC-Q200 automotive qualification, ROHS3 environmental compliance, MSL 1 moisture sensitivity rating, and REACH Unaffected status. Regulatory and quality requirements are equivalent.

Q: What are the key parameters that define substitution eligibility for this resistor?

A: Substitution eligibility is determined by equivalence in resistance value (12 kOhms), tolerance (±2%), power rating (0.05W), package type (0201 / 0603 Metric), composition (thick film), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), and automotive qualification (AEC-Q200). Deviation in any of these parameters disqualifies a part as a direct equivalent.

Q: Is the packaging format identical between these part numbers?

A: The primary packaging specification is identical: both are supplied in 0201 (0603 Metric) surface mount package format with 0.024" L x 0.012" W (0.60mm x 0.30mm) dimensions and 0.010" (0.26mm) maximum seated height. The original part number specifies Tape & Reel (TR) packaging; the substitute part number packaging format was not specified in available data but maintains the same component package standard.