RK73G1HTTC1200D Equivalent & Substitute Parts

Part Overview

The RK73G1HTTC1200D is a 120 Ohms ±0.5% chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in the 0201 (0603 Metric) package. This thick film resistor is qualified to the automotive AEC-Q200 standard and is designed for high-reliability applications requiring precision resistance values in compact form factors.

The RK73G1HTTC1200D carries a product status of "Not For New Designs," indicating that while the component remains available in inventory, KOA Speer Electronics has transitioned this model out of active production. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for existing applications or new designs requiring identical electrical and mechanical characteristics.

Substiute Parts

RK73G1HTTC1200D

KOA Speer Electronics, Inc.In Stock: 925RK73G1HTTC1200D Datasheet

Current PartRFQ

RK73G1HTTCM1200D

KOA Speer Electronics, Inc.In Stock: 848RK73G1HTTCM1200D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73G1HTTC1200D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 120 Ohms (exact match required)
• Tolerance: ±0.5% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)

Mechanical Parameters:

• Package / Case: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)

Compliance & Certification:

• Automotive AEC-Q200 qualification (required for automotive applications)
• RoHS3 compliance (required for regulatory conformance)
• Moisture Sensitivity Level 1 (required for storage and handling compatibility)

Substitute parts must match all electrical, mechanical, and compliance parameters without exception. Differences in product status (Active vs. Not For New Designs) do not affect substitution eligibility when all technical specifications are identical.

Parameter Comparison

Engineering Selection Recommendations

The RK73G1HTTCM1200D is a direct equivalent substitute for the RK73G1HTTC1200D. All electrical specifications, mechanical dimensions, package configuration, and automotive compliance certifications are identical between the two parts.

The primary distinction is product status: the RK73G1HTTC1200D is designated "Not For New Designs," while the RK73G1HTTCM1200D carries an "Active" status. This difference reflects manufacturing lifecycle management by KOA Speer Electronics and does not indicate any technical deficiency or incompatibility in the obsolete part.

For new circuit designs, the RK73G1HTTCM1200D is the recommended selection due to its active production status, ensuring long-term availability and supply chain continuity. For existing applications currently using the RK73G1HTTC1200D, the substitute part provides seamless functional and mechanical compatibility without design modification.

Both parts satisfy AEC-Q200 automotive qualification requirements and ROHS3 regulatory compliance, making either part suitable for automotive and industrial applications requiring precision 120 Ohm resistors in 0201 package form factors.

Frequently Asked Questions (FAQ)

Q: Can the RK73G1HTTCM1200D be used as a direct replacement for the RK73G1HTTC1200D in existing designs?

A: Yes. The RK73G1HTTCM1200D is electrically and mechanically identical to the RK73G1HTTC1200D. All specifications including resistance value, tolerance, power rating, temperature coefficient, operating temperature range, package dimensions, and automotive AEC-Q200 certification are equivalent. No circuit redesign or PCB layout modification is required.

Q: What does "Not For New Designs" mean for the RK73G1HTTC1200D?

A: "Not For New Designs" indicates that KOA Speer Electronics has transitioned this part number out of active production. While existing inventory remains available, the manufacturer recommends using the active equivalent (RK73G1HTTCM1200D) for new circuit designs to ensure long-term supply availability and manufacturing consistency.

Q: Are there any differences in the 0201 package dimensions between these two parts?

A: No. Both parts use the identical 0201 (0603 Metric) package with dimensions of 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). PCB footprints and assembly processes are interchangeable.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the RK73G1HTTC1200D and RK73G1HTTCM1200D are qualified to the AEC-Q200 automotive standard, confirming suitability for automotive applications requiring high reliability and temperature stability.

Q: What is the significance of the ±50ppm/°C temperature coefficient?

A: The ±50ppm/°C temperature coefficient specifies the maximum change in resistance value per degree Celsius across the operating temperature range of -55°C to 155°C. This specification is identical for both parts and indicates precision-grade performance suitable for applications requiring stable resistance values across wide temperature variations.

Q: Are the RoHS and REACH compliance statuses the same for both parts?

A: Yes. Both parts are ROHS3 Compliant and REACH Unaffected, confirming compliance with European environmental and chemical safety regulations.