Equivalent & Substitute Parts for RK73H1HTTC4422F

Part Overview

The RK73H1HTTC4422F is a 44.2 kOhms ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., designed for 0.05W (1/20W) applications in the 0201 (0603 Metric) package format. This component is rated for automotive applications under AEC-Q200 and features moisture-resistant construction with unlimited moisture sensitivity level (MSL 1).

The RK73H1HTTC4422F carries a "Not For New Designs" product status, indicating that KOA Speer Electronics has transitioned this part to end-of-life or obsolescence management. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this resistor specification.

Substiute Parts

RK73H1HTTC4422F

KOA Speer Electronics, Inc.In Stock: 11058RK73H1HTTC4422F Datasheet

Current PartRFQ

RK73H1HTTCM4422F

KOA Speer Electronics, Inc.In Stock: 868RK73H1HTTCM4422F Datasheet

MFR RecommendedRFQ

AC0201FR-0744K2L

YAGEOIn Stock: 762AC0201FR-0744K2L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC4422F are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters:

• Resistance value: 44.2 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 / Case: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Number of terminations: 2 (exact match required)

Compliance & Ratings:

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

Substitute parts must satisfy all electrical, mechanical, and compliance parameters without deviation. Product status (Active vs. Not For New Designs) does not affect substitution eligibility but influences supply chain availability and long-term sourcing strategy.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM4422F (KOA Speer Electronics, Inc. - MFR Recommended Substitute)

This part is the manufacturer-recommended substitute from KOA Speer Electronics, Inc. It maintains identical electrical specifications (44.2 kOhms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C) and mechanical compatibility (0201 package, thick film composition). Both parts carry AEC-Q200 automotive certification and ROHS3 compliance with MSL 1 rating. The primary distinction is that RK73H1HTTCM4422F holds Active product status, ensuring continued manufacturer support and supply chain availability. The absence of explicit moisture resistance specification in the detailed description does not affect functional equivalence, as both parts meet identical electrical and thermal performance criteria. Current inventory of 822 pieces supports production requirements.

AC0201FR-0744K2L (YAGEO - Direct Substitute)

This YAGEO component provides direct electrical and mechanical substitution with identical specifications across all critical parameters: 44.2 kOhms ±1%, 0.05W power rating, ±200ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. The 0201 package, thick film composition, and AEC-Q200 automotive rating ensure pin-for-pin and functional compatibility. AC0201FR-0744K2L explicitly includes moisture-resistant construction, matching the original part's environmental protection. ROHS3 compliance and MSL 1 rating align with regulatory and handling requirements. Active product status and Tape & Reel packaging provide supply continuity. Current inventory of 719 pieces supports immediate procurement.

Selection Criteria:

• For continued use of KOA Speer Electronics components within existing supply chains, select RK73H1HTTCM4422F.
• For cross-manufacturer diversification and assured long-term availability, select AC0201FR-0744K2L.
• Both substitutes are electrically and mechanically interchangeable with the original RK73H1HTTC4422F.

Frequently Asked Questions (FAQ)

Q1: Can RK73H1HTTCM4422F and AC0201FR-0744K2L be used interchangeably with RK73H1HTTC4422F?

A: Yes. Both substitute parts meet all electrical specifications (44.2 kOhms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C), mechanical requirements (0201 package, thick film, 2 terminations), and compliance standards (AEC-Q200, ROHS3, MSL 1). They are functionally equivalent and pin-compatible.

Q2: What is the significance of the "Not For New Designs" status on the original part?

A: This status indicates that KOA Speer Electronics has discontinued active promotion and development of the RK73H1HTTC4422F. Existing inventory may be available, but the manufacturer recommends using RK73H1HTTCM4422F for new designs. This does not affect the performance or reliability of existing applications using the original part.

Q3: Does the absence of explicit "Moisture Resistant" specification in RK73H1HTTCM4422F affect its suitability?

A: No. Both the original part and RK73H1HTTCM4422F carry identical MSL 1 (Unlimited) ratings, indicating equivalent moisture sensitivity performance. The detailed description of RK73H1HTTCM4422F does not explicitly state moisture resistance, but the MSL 1 classification confirms equivalent environmental protection.

Q4: Are there packaging differences between the substitute parts?

A: RK73H1HTTC4422F and AC0201FR-0744K2L are both supplied in Tape & Reel (TR) packaging. RK73H1HTTCM4422F packaging format is not specified in the provided data. All three parts use the 0201 (0603 Metric) package case, ensuring mechanical compatibility on PCBs.

Q5: Which substitute part should be selected for automotive applications?

A: Both RK73H1HTTCM4422F and AC0201FR-0744K2L carry AEC-Q200 automotive certification. Selection depends on supply chain strategy: choose RK73H1HTTCM4422F for KOA Speer Electronics continuity, or AC0201FR-0744K2L for manufacturer diversification. Both are qualified for automotive use.

Q6: What is the current inventory status for each part?

A: RK73H1HTTC4422F has 11019 pieces in stock. RK73H1HTTCM4422F has 822 pieces available. AC0201FR-0744K2L has 719 pieces in inventory. Inventory levels should be verified with suppliers for current availability.

Q7: Do all three parts comply with RoHS and REACH regulations?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.