Equivalent & Substitute Parts for RK73H1HTTC1801D

Part Overview

The RK73H1HTTC1801D is a 1.8 kOhms ±0.5% chip resistor in 0201 package (0603 Metric) manufactured by KOA Speer Electronics, Inc. This thick film resistor is rated for automotive applications under AEC-Q200 standard with moisture-resistant construction. The part is currently classified as "Not For New Designs," which necessitates identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for ongoing production and maintenance applications.

Substiute Parts

RK73H1HTTC1801D

KOA Speer Electronics, Inc.In Stock: 904RK73H1HTTC1801D Datasheet

Current PartRFQ

RK73H1HTTCM1801D

KOA Speer Electronics, Inc.In Stock: 1141RK73H1HTTCM1801D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC1801D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 1.8 kOhms (exact match required)
• Tolerance: ±0.5% (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 / Case: 0201 (0603 Metric) (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 (Max): 0.010" / 0.26mm (exact match required)

Compliance & Quality Parameters:

• Automotive rating: AEC-Q200 (exact match required)
• Composition: Thick Film (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: MSL 1 (exact match required)

The substitute part must originate from the same manufacturer series (RK73H) and maintain active product status to ensure long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM1801D serves as the direct equivalent substitute for the RK73H1HTTC1801D. Both parts are manufactured by KOA Speer Electronics, Inc. within the RK73H series and maintain complete electrical and mechanical equivalence across all specified parameters.

The primary distinction between the two parts is product status: the original RK73H1HTTC1801D is designated "Not For New Designs," while the substitute RK73H1HTTCM1801D maintains "Active" status. This status difference reflects manufacturing lifecycle management and does not indicate any technical deficiency in the original part.

Both parts satisfy identical compliance requirements:

• AEC-Q200 automotive qualification
• ROHS3 compliance
• REACH unaffected classification
• MSL 1 moisture sensitivity rating

Selection of the RK73H1HTTCM1801D is appropriate for applications requiring long-term supply chain assurance and ongoing production support. The substitute part is suitable for direct replacement in all circuit applications where the RK73H1HTTC1801D was originally specified, with no circuit redesign or validation required.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM1801D be used as a direct replacement for RK73H1HTTC1801D?

A: Yes. The RK73H1HTTCM1801D is a direct equivalent substitute. All electrical parameters (resistance, tolerance, power rating, temperature coefficient), mechanical dimensions, package specifications, and automotive compliance ratings are identical between the two parts.

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

A: "Not For New Designs" indicates that the manufacturer has transitioned this part to end-of-life status and recommends using the active equivalent for new circuit designs. Existing inventory of the original part may still be used for maintenance and repair applications. The substitute part with "Active" status ensures continued availability for future production needs.

Q: Are there any differences in moisture handling or storage requirements between these parts?

A: No. Both parts carry MSL 1 (Unlimited) moisture sensitivity level rating, indicating they require no special moisture control during storage or handling. Standard industrial storage conditions are appropriate for both parts.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the RK73H1HTTC1801D and RK73H1HTTCM1801D are qualified to AEC-Q200 standard for automotive applications. Both are suitable for use in automotive circuits requiring this qualification level.

Q: Is there any difference in the 0201 package dimensions between these parts?

A: No. Both parts use identical 0201 (0603 Metric) package specifications 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 identical.

Q: What is the difference between the part numbers RK73H1HTTC1801D and RK73H1HTTCM1801D?

A: The difference in part numbering reflects manufacturing lifecycle designation. The "M" designation in RK73H1HTTCM1801D indicates the active production variant. The electrical and mechanical specifications remain identical; the part number change is administrative rather than technical.

Q: Are both parts ROHS3 compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components in industrial and automotive applications.