RK73B1HTTC183G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC183G is an 18 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 The part is currently classified as "Not For New Designs," indicating it has been superseded in the product line. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to active product alternatives that maintain identical electrical and mechanical specifications.

Substiute Parts

RK73B1HTTC183G

KOA Speer Electronics, Inc.In Stock: 861RK73B1HTTC183G Datasheet

Current PartRFQ

RK73B1HTTCM183G

KOA Speer Electronics, Inc.In Stock: 961RK73B1HTTCM183G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC183G is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (18 kOhms), tolerance (±2%), power rating (0.05W), and temperature coefficient (±200ppm/°C) must be identical. These parameters define the functional performance of the resistor in circuit operation.

Mechanical Parameters: Package format (0201 / 0603 Metric), physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm), and termination count (2) must match to ensure PCB layout compatibility and assembly process compatibility.

Compliance Parameters: Automotive AEC-Q200 qualification, RoHS3 compliance, and operating temperature range (-55°C ~ 155°C) must be maintained to satisfy regulatory and application requirements.

Series Designation: Both parts belong to the RK73B series, confirming product family equivalence.

Substitute parts must maintain all specified parameters without deviation. No parameter relaxation or tolerance expansion is permitted.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM183G is the direct equivalent substitute for the RK73B1HTTC183G. Both parts are manufactured by KOA Speer Electronics, Inc. and maintain identical electrical, mechanical, and compliance specifications across all critical parameters.

The primary distinction is product status: the original part (RK73B1HTTC183G) is classified as "Not For New Designs," while the substitute (RK73B1HTTCM183G) maintains "Active" status. This status change reflects the manufacturer's product line evolution and indicates that the substitute part represents the current production standard for this specification.

Both parts satisfy automotive AEC-Q200 qualification requirements and maintain ROHS3 compliance, ensuring suitability for regulated applications. The identical operating temperature range (-55°C ~ 155°C), moisture sensitivity level (MSL 1), and all electrical parameters confirm full functional and physical interchangeability.

For new designs and ongoing production, the RK73B1HTTCM183G should be selected. For existing designs currently using the RK73B1HTTC183G, direct substitution with the RK73B1HTTCM183G is permissible without circuit redesign or PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the RK73B1HTTCM183G be used as a direct replacement for the RK73B1HTTC183G in existing designs?

A: Yes. Both parts are electrically and mechanically identical. All resistance, tolerance, power rating, package dimensions, and compliance specifications match exactly. Direct substitution requires no circuit or layout changes.

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

A: This designation indicates the part has been superseded in the manufacturer's product line. The RK73B1HTTCM183G represents the current active equivalent. For new designs, the active part should be specified.

Q: Are there any differences in packaging or handling between these parts?

A: Both parts use identical 0201 package format (0.60mm x 0.30mm) with identical physical dimensions and termination configuration. Moisture sensitivity level (MSL 1) is identical, requiring no changes to storage or handling procedures.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both parts carry AEC-Q200 automotive qualification and ROHS3 compliance certification. They are suitable for automotive and regulated applications without additional qualification.

Q: What is the temperature coefficient difference, if any?

A: Both parts have identical temperature coefficient specifications of ±200ppm/°C across the full operating range of -55°C ~ 155°C. No performance variation exists between the parts across temperature extremes.

Q: Can these parts be used interchangeably in high-reliability applications?

A: Yes. Both parts maintain identical electrical stability, compliance certifications, and operating specifications. The only distinction is product lifecycle status, not performance or reliability characteristics.