RK73B1HTTC681G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC681G is a 680 Ohm ±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 The part is currently classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to active product alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

RK73B1HTTC681G

KOA Speer Electronics, Inc.In Stock: 779RK73B1HTTC681G Datasheet

Current PartRFQ

RK73B1HTTCM681G

KOA Speer Electronics, Inc.In Stock: 903RK73B1HTTCM681G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC681G is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (680 Ohms), 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 Parameters: Package format (0201 / 0603 Metric) and physical dimensions (0.024" L x 0.012" W, height 0.010" max) must match to ensure PCB footprint compatibility and assembly process compatibility.

Composition & Construction: Thick film construction is required to maintain electrical characteristics and reliability performance.

Compliance & Ratings: AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating must be maintained for applications requiring automotive-grade reliability and environmental compliance.

The substitute part RK73B1HTTCM681G meets all these criteria while offering the advantage of "Active" product status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM681G is the direct equivalent substitute for RK73B1HTTC681G. Both parts are manufactured by KOA Speer Electronics, Inc. within the RK73B series and share identical electrical, mechanical, and thermal specifications. The primary distinction is product lifecycle status: the original part is classified as "Not For New Designs," while the substitute maintains "Active" status.

For applications currently using RK73B1HTTC681G, transition to RK73B1HTTCM681G is supported by:

Compliance Equivalence: Both parts maintain ROHS3 compliance, REACH unaffected status, and AEC-Q200 automotive qualification, ensuring regulatory and quality requirements are preserved.

Functional Equivalence: Identical resistance (680 Ohms), tolerance (±2%), power rating (0.05W), temperature coefficient (±200ppm/°C), and operating range (-55°C ~ 155°C) ensure electrical performance is maintained across all operating conditions.

Physical Equivalence: Identical 0201 package dimensions and termination configuration ensure direct PCB footprint compatibility without layout modifications.

Supply Continuity: The substitute part's active status provides assurance of continued availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM681G be used as a direct replacement for RK73B1HTTC681G in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The substitute part maintains all electrical specifications (680 Ohms ±2%, 0.05W), thermal characteristics (±200ppm/°C, -55°C ~ 155°C), package format (0201), and compliance ratings (AEC-Q200, ROHS3). Direct substitution is supported without circuit modifications or re-qualification.

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

A: This designation indicates the manufacturer has transitioned the part to end-of-life status and recommends using alternative products for new designs. The substitute part RK73B1HTTCM681G carries "Active" status, confirming ongoing manufacturing support and supply availability.

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 MSL 1 (Unlimited) moisture sensitivity rating. Handling, storage, and assembly processes are equivalent.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both RK73B1HTTC681G and RK73B1HTTCM681G carry AEC-Q200 automotive qualification, confirming suitability for automotive applications requiring this standard.

Q: What is the difference between the part numbers RK73B1HTTC681G and RK73B1HTTCM681G?

A: The difference is indicated by the "M" character in the substitute part number (RK73B1HTTCM681G). This character denotes a product line or manufacturing variant within the RK73B series while maintaining identical electrical and mechanical specifications. Both parts are from the same manufacturer and series.