RK73B1HTTC203G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC203G is a 20 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 designed for automotive applications and meets AEC-Q200 qualification standards. The part is currently classified as Not For New Designs, which necessitates identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for ongoing production and maintenance applications.

Substiute Parts

RK73B1HTTC203G

KOA Speer Electronics, Inc.In Stock: 928RK73B1HTTC203G Datasheet

Current PartRFQ

RK73B1HTTCM203G

KOA Speer Electronics, Inc.In Stock: 1153RK73B1HTTCM203G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC203G is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Resistance value (20 kOhms), tolerance (±2%), and power rating (0.05W) must be identical. Temperature coefficient (±200ppm/°C) and operating temperature range (-55°C ~ 155°C) establish thermal performance boundaries.

Mechanical Specifications: Package format (0201 / 0603 Metric), physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm), and seated height (0.010" / 0.26mm maximum) must match exactly to ensure PCB compatibility and assembly process compatibility.

Compliance & Ratings: AEC-Q200 automotive qualification, RoHS3 compliance, and MSL 1 rating are mandatory for equivalent substitution in automotive applications.

Composition: Thick film construction must be maintained to preserve electrical performance characteristics.

Parts meeting all these criteria are classified as direct equivalents and may be substituted without circuit redesign or validation.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM203G is a direct electrical and mechanical equivalent to the RK73B1HTTC203G. Both components are manufactured by KOA Speer Electronics within the RK73B series and share identical specifications across all critical parameters: 20 kOhms resistance, ±2% tolerance, 0.05W power rating, 0201 package format, ±200ppm/°C temperature coefficient, and -55°C to 155°C operating range.

The primary distinction is product status: the original part (RK73B1HTTC203G) is designated Not For New Designs, while the substitute (RK73B1HTTCM203G) maintains Active status. Both parts carry AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating, confirming suitability for automotive applications without additional qualification requirements.

For applications currently using RK73B1HTTC203G, transition to RK73B1HTTCM203G is supported without circuit modification, PCB redesign, or assembly process changes. The substitute part is available in higher inventory (1081 Pcs vs. 867 Pcs), providing improved supply continuity.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM203G be used as a direct replacement for RK73B1HTTC203G in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. No circuit redesign, PCB layout modification, or assembly process adjustment is required. The substitute maintains identical resistance (20 kOhms), tolerance (±2%), power rating (0.05W), package format (0201), and automotive qualification (AEC-Q200).

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

A: This designation indicates the RK73B1HTTC203G is in end-of-life phase and is not recommended for new product development. The RK73B1HTTCM203G, with Active status, is the current production equivalent and should be specified for new designs and ongoing production.

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

A: No. Both parts are ROHS3 compliant, AEC-Q200 qualified, and carry MSL 1 rating. Compliance certifications are identical, confirming equivalent suitability for automotive applications.

Q: Does the 0201 package format have any assembly or handling considerations?

A: The 0201 package (0.60mm x 0.30mm) is a miniature format requiring precision placement equipment and careful handling during assembly. Both parts share identical physical dimensions and seated height (0.010" maximum), ensuring compatibility with existing assembly processes and equipment settings.

Q: What is the temperature coefficient specification, and why is it important?

A: Both parts specify ±200ppm/°C temperature coefficient within the -55°C to 155°C operating range. This parameter defines resistance value drift relative to temperature changes and is critical for precision analog circuits. Identical specifications confirm equivalent performance across the full automotive temperature range.

Q: Is inventory availability a factor in part selection?

A: While both parts are in stock, RK73B1HTTCM203G has higher inventory (1081 Pcs vs. 867 Pcs). For applications requiring sustained supply, the substitute part offers improved availability and supply chain continuity.