RK73H1HTTC2102F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC2102F is a 21 kOhms ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc. in the 0201 (0603 Metric) package format. This component is rated for 0.05W (1/20W) power dissipation and meets automotive AEC-Q200 qualification standards with moisture-resistant construction. The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Equivalent and substitute parts are necessary to support existing designs, legacy system maintenance, and procurement continuity where the original part number is unavailable or discontinued.

Substiute Parts

RK73H1HTTC2102F

KOA Speer Electronics, Inc.In Stock: 27574RK73H1HTTC2102F Datasheet

Current PartRFQ

RK73H1HTTCM2102F

KOA Speer Electronics, Inc.In Stock: 1144RK73H1HTTCM2102F Datasheet

MFR RecommendedRFQ

AC0201FR-0721KL

YAGEOIn Stock: 1152AC0201FR-0721KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC2102F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 21 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)

Mechanical Parameters:

• Package format: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Number of terminations: 2 (exact match required)
• Physical dimensions: 0.024" L x 0.012" W / 0.60mm x 0.30mm (exact match required)
• Height seated maximum: 0.010" / 0.26mm (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 handling and storage)

Substitute parts must match all parameters listed above. Manufacturer differences are acceptable provided all electrical, mechanical, and compliance specifications are identical.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM2102F (KOA Speer Electronics, Inc.)

This substitute is the manufacturer-recommended upgrade path from the RK73H1HTTC2102F. Both parts are from the same manufacturer and RK73H series product line. The RK73H1HTTCM2102F carries Active product status, indicating ongoing manufacturing support and availability. This part is suitable for new designs and ongoing production of legacy systems. All electrical and mechanical parameters are identical to the main part. The primary distinction is the absence of explicit moisture-resistant designation in the specification, though MSL rating remains at Level 1 (Unlimited).

AC0201FR-0721KL (YAGEO)

This substitute is a cross-manufacturer equivalent from YAGEO. All electrical specifications, mechanical dimensions, and compliance certifications match the RK73H1HTTC2102F exactly. The AC0201FR-0721KL maintains Active product status and includes explicit moisture-resistant construction. This part is suitable for applications requiring automotive AEC-Q200 qualification and is available in Tape & Reel packaging. Selection of this part introduces a manufacturer change but maintains full electrical and mechanical compatibility.

Both substitutes are appropriate for direct replacement in automotive and industrial applications where AEC-Q200 compliance is required. Selection between them depends on supply chain preferences, packaging requirements, and manufacturer qualification status within the end-user's quality management system.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM2102F be used as a direct replacement for RK73H1HTTC2102F?

A: Yes. The RK73H1HTTCM2102F is the manufacturer-recommended substitute. All electrical parameters (resistance, tolerance, power rating, temperature coefficient, operating temperature range) and mechanical specifications (package, dimensions, terminations) are identical. The primary difference is product status: RK73H1HTTCM2102F is Active, while RK73H1HTTC2102F is Not For New Designs.

Q: Can AC0201FR-0721KL from YAGEO replace the KOA Speer RK73H1HTTC2102F?

A: Yes. The AC0201FR-0721KL meets all electrical and mechanical requirements for direct substitution. Both parts are 21 kOhms ±1%, 0.05W, 0201 package, thick film composition, with ±200ppm/°C temperature coefficient and -55°C ~ 155°C operating range. Both carry AEC-Q200 automotive qualification and ROHS3 compliance. The substitution involves a manufacturer change from KOA Speer to YAGEO.

Q: What are the critical parameters that must match for substitution?

A: Substitution requires exact matching of: resistance value (21 kOhms), tolerance (±1%), power rating (0.05W), package format (0201), composition (thick film), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), AEC-Q200 rating, and physical dimensions (0.024" L x 0.012" W, 0.010" max height). Any deviation in these parameters disqualifies a part as a direct substitute.

Q: Is moisture-resistant construction a requirement for substitution?

A: Moisture-resistant construction is not a disqualifying factor for substitution. Both the main part and substitutes maintain MSL Level 1 (Unlimited) rating. While RK73H1HTTC2102F and AC0201FR-0721KL explicitly specify moisture-resistant construction, RK73H1HTTCM2102F does not include this designation in its specification. All three parts meet the same MSL requirement.

Q: What is the difference between RK73H1HTTC2102F and RK73H1HTTCM2102F?

A: Both parts are from KOA Speer Electronics' RK73H series with identical electrical and mechanical specifications. The primary difference is product lifecycle status: RK73H1HTTC2102F is classified as "Not For New Designs," while RK73H1HTTCM2102F is Active. The "M" designation in RK73H1HTTCM2102F may indicate a manufacturing or specification revision. For new designs and ongoing production, RK73H1HTTCM2102F is the recommended choice.

Q: Are there packaging differences between the substitutes?

A: RK73H1HTTC2102F and AC0201FR-0721KL are both available in Tape & Reel (TR) packaging. RK73H1HTTCM2102F packaging is not specified in the available data. For applications requiring specific packaging formats (tape and reel for automated assembly), AC0201FR-0721KL and RK73H1HTTC2102F are confirmed compatible. Packaging specifications for RK73H1HTTCM2102F should be verified with the manufacturer or distributor.

Q: Can these parts be used in automotive applications?

A: Yes. All three parts carry AEC-Q200 automotive qualification, which certifies them for use in automotive applications. This rating confirms compliance with automotive industry reliability and quality standards. The -55°C ~ 155°C operating temperature range supports automotive environmental requirements.

Q: What does ROHS3 compliance mean for these parts?

A: ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive (RoHS 3), which restricts the use of specific hazardous materials in electrical and electronic equipment. All three substitute parts are ROHS3 compliant, confirming they meet current regulatory requirements for use in regulated markets and applications.