RK73H1HTTC1802D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC1802D is an 18 kOhms ±0.5% thick film chip resistor in 0201 package (0603 Metric) rated for 0.05W (1/20W) power dissipation. This component is designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction. The part carries a "Not For New Designs" status, indicating it has been superseded in the manufacturer's product line. Identification of equivalent substitute parts is necessary for ongoing support of legacy designs and inventory management.

Substiute Parts

RK73H1HTTC1802D

KOA Speer Electronics, Inc.In Stock: 1047RK73H1HTTC1802D Datasheet

Current PartRFQ

RK73H1HTTCM1802D

KOA Speer Electronics, Inc.In Stock: 1039RK73H1HTTCM1802D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC1802D is determined by strict equivalence across all primary electrical and mechanical parameters:

Mandatory Matching Parameters:

• Resistance value: 18 kOhms
• Tolerance: ±0.5%
• Power rating: 0.05W (1/20W)
• Package: 0201 (0603 Metric)
• Composition: Thick Film
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Automotive qualification: AEC-Q200
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL 1

Substitute parts must maintain identical electrical performance and physical dimensions. Variations in product status (Active vs. Not For New Designs) do not affect functional substitutability when all electrical and mechanical specifications are preserved.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM1802D is the direct equivalent substitute for RK73H1HTTC1802D.

Substitution Basis:

The RK73H1HTTCM1802D maintains complete electrical and mechanical equivalence with the main part across all specified parameters. Both components are manufactured by KOA Speer Electronics within the RK73H series and deliver identical performance characteristics for 18 kOhms ±0.5% thick film resistor applications.

Compliance Status:

Both parts satisfy AEC-Q200 automotive qualification requirements and ROHS3 compliance mandates. Moisture sensitivity classification (MSL 1) is identical, eliminating any handling or storage requirement differences.

Product Status Consideration:

The primary distinction is product status: RK73H1HTTC1802D carries "Not For New Designs" designation, while RK73H1HTTCM1802D is listed as "Active." This status difference reflects manufacturer lifecycle management and does not indicate functional or performance divergence. The substitute part represents the current production equivalent for ongoing design support and component replenishment.

Selection Criteria:

For applications requiring the RK73H1HTTC1802D specification, RK73H1HTTCM1802D provides direct functional replacement with the advantage of active production status and current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM1802D be used as a direct replacement for RK73H1HTTC1802D in existing designs?

A: Yes. The substitute part is electrically and mechanically identical across all specified parameters. Resistance value, tolerance, power rating, package dimensions, temperature characteristics, and automotive qualification are equivalent. Direct substitution is supported without circuit redesign or validation.

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

A: This designation indicates the RK73H1HTTC1802D has been superseded in the manufacturer's product line. The substitute RK73H1HTTCM1802D represents the current active equivalent. For legacy system support, the main part remains functionally valid; however, new procurement should utilize the active substitute part.

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

A: No. Both components carry MSL 1 (Unlimited) classification, indicating identical moisture sensitivity levels. Storage, handling, and shelf-life requirements are equivalent.

Q: Does the substitute part maintain AEC-Q200 automotive qualification?

A: Yes. RK73H1HTTCM1802D is AEC-Q200 qualified, matching the automotive rating of the main part. Both components are suitable for automotive applications requiring this qualification standard.

Q: Are there packaging differences between the main part and substitute?

A: Both parts use 0201 (0603 Metric) package with identical physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). PCB layout and assembly processes require no modification.

Q: What is the basis for confirming substitutability?

A: Substitutability is confirmed through complete parameter equivalence: identical resistance value (18 kOhms), tolerance (±0.5%), power rating (0.05W), composition (thick film), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and all compliance certifications (AEC-Q200, ROHS3, REACH Unaffected).