RK73B1HTTC680G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC680G is a 68 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 The part is currently classified as "Not For New Designs," indicating it has been superseded in the product line.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

RK73B1HTTC680G

KOA Speer Electronics, Inc.In Stock: 878RK73B1HTTC680G Datasheet

Current PartRFQ

RK73B1HTTCM680G

KOA Speer Electronics, Inc.In Stock: 951RK73B1HTTCM680G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC680G is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (68 Ohms), tolerance (±2%), and power rating (0.05W) must be identical. Temperature coefficient (±200ppm/°C) and operating temperature range (-55°C ~ 155°C) define thermal performance boundaries and must match exactly.

Mechanical Parameters: 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) ensure PCB compatibility and assembly process compatibility.

Compliance & Quality Parameters: AEC-Q200 automotive qualification, RoHS3 compliance, and MSL 1 rating establish regulatory and reliability requirements. These certifications must be maintained in any substitute part.

Composition: Thick film construction is a defining characteristic and must be preserved.

Substitute parts must match all parameters listed above without exception. No parameter relaxation or trade-off is permitted.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM680G is the direct substitute for RK73B1HTTC680G. Both parts are manufactured by KOA Speer Electronics, Inc. within the RK73B series and maintain identical electrical, mechanical, and thermal specifications. The key distinction is product lifecycle status: the original part is classified as "Not For New Designs," while the substitute is Active.

For new designs and ongoing production, RK73B1HTTCM680G is the appropriate selection. This part maintains full AEC-Q200 automotive qualification, ROHS3 compliance, and unlimited moisture sensitivity rating (MSL 1). All electrical parameters—resistance, tolerance, power rating, and temperature coefficient—are identical, ensuring direct functional equivalence in circuit applications.

For existing designs currently using RK73B1HTTC680G, transition to RK73B1HTTCM680G presents no technical risk. The parts are pin-compatible, package-compatible, and performance-equivalent. The substitute part offers improved supply chain availability (910 Pcs in stock versus 778 Pcs for the original part).

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM680G be used as a direct replacement for RK73B1HTTC680G in existing assemblies?

A: Yes. Both parts are electrically and mechanically identical. They share the same resistance value (68 Ohms), tolerance (±2%), power rating (0.05W), package format (0201), and thermal characteristics. No circuit redesign or PCB modification is required.

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

A: This designation indicates the RK73B1HTTC680G has been superseded in the manufacturer's product line. KOA Speer Electronics, Inc. recommends using RK73B1HTTCM680G for all new designs. Existing inventory of the original part may be used for legacy product support, but new designs should specify the Active substitute.

Q: Are the physical dimensions identical between these two parts?

A: Yes. Both parts measure 0.024" L x 0.012" W (0.60mm x 0.30mm) with a maximum seated height of 0.010" (0.26mm). They are fully compatible with the same PCB footprints and assembly equipment.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both RK73B1HTTC680G and RK73B1HTTCM680G carry AEC-Q200 automotive qualification. They are suitable for automotive applications requiring this certification standard.

Q: What is the difference between the part numbers?

A: The part numbers differ only in the suffix: RK73B1HTTC680G versus RK73B1HTTCM680G. This suffix variation reflects a product line update by the manufacturer but does not indicate any functional or performance difference. The "M" designation in the substitute part number indicates the updated Active version within the same series.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1 - Unlimited). They meet the same regulatory and environmental standards.