RK73H1HTTC3243F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC3243F is a 324 kOhms ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in the 0201 package format. This component is designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction.

The RK73H1HTTC3243F carries a "Not For New Designs" product status, indicating that KOA Speer Electronics has transitioned this part to end-of-life. Identifying equivalent and substitute parts is necessary for ongoing production support, legacy system maintenance, and design continuity where this resistor specification is required.

Substiute Parts

RK73H1HTTC3243F

KOA Speer Electronics, Inc.In Stock: 915RK73H1HTTC3243F Datasheet

Current PartRFQ

RK73H1HTTCM3243F

KOA Speer Electronics, Inc.In Stock: 771RK73H1HTTCM3243F Datasheet

MFR RecommendedRFQ

AC0201FR-07324KL

YAGEOIn Stock: 1135AC0201FR-07324KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC3243F are qualified based on the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Resistance value: 324 kOhms
• Tolerance: ±1%
• Power rating: 0.05W (1/20W)
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 155°C

Mechanical & Compliance Criteria:

• Package format: 0201 (0603 Metric)
• Physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm)
• Height seated (max): 0.010" (0.26mm)
• Number of terminations: 2
• Composition: Thick Film
• Automotive qualification: AEC-Q200
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL 1 (Unlimited)

Substitute parts must match all listed parameters to ensure direct functional and mechanical interchangeability in the same circuit application and PCB footprint.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: RK73H1HTTCM3243F (KOA Speer Electronics)

The RK73H1HTTCM3243F is the manufacturer-recommended substitute from KOA Speer Electronics. This part maintains active product status and carries identical electrical specifications (324 kOhms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C). Both parts are AEC-Q200 qualified and ROHS3 compliant with MSL 1 rating. The primary distinction is that the RK73H1HTTCM3243F does not specify moisture-resistant construction in its detailed description, whereas the original part explicitly includes this feature. For applications where moisture resistance is a critical design requirement, this difference should be evaluated against application environmental conditions.

Alternative Substitute: AC0201FR-07324KL (YAGEO)

The AC0201FR-07324KL from YAGEO provides a cross-manufacturer equivalent with identical electrical and mechanical parameters. This part is currently in active production status with higher inventory availability (1,060 pcs vs. 699 pcs for the KOA Speer substitute). The AC0201FR-07324KL explicitly includes moisture-resistant construction, matching the original part's environmental protection specification. Both parts meet AEC-Q200 automotive qualification and ROHS3 compliance requirements. Selection between the KOA Speer and YAGEO options depends on supply chain preferences, inventory requirements, and established qualification protocols for cross-manufacturer substitution.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM3243F be used as a direct replacement for RK73H1HTTC3243F?

A: Yes. Both parts share identical electrical specifications (324 kOhms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C), package format (0201), and automotive qualification (AEC-Q200). The RK73H1HTTCM3243F is the active production equivalent from the same manufacturer. The only documented difference is that moisture-resistant construction is not explicitly specified for the substitute, though this should be confirmed with the manufacturer if moisture resistance is a design requirement.

Q: Is AC0201FR-07324KL from YAGEO compatible with the original KOA Speer part?

A: Yes. The AC0201FR-07324KL meets all electrical and mechanical parameters required for substitution: 324 kOhms ±1%, 0.05W power rating, ±200ppm/°C temperature coefficient, -55°C ~ 155°C operating range, 0201 package, AEC-Q200 qualification, and ROHS3 compliance. The YAGEO part explicitly includes moisture-resistant construction, matching the original specification. Cross-manufacturer substitution should follow your organization's component qualification and approval procedures.

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

A: "Not For New Designs" indicates that KOA Speer Electronics has discontinued active development and marketing of the RK73H1HTTC3243F. This status typically precedes full end-of-life declaration. For new circuit designs, the active substitute RK73H1HTTCM3243F or AC0201FR-07324KL should be specified. For existing production or legacy system support, the original part may remain available from inventory until stock depletion.

Q: Are there packaging differences between these substitutes?

A: The RK73H1HTTC3243F and AC0201FR-07324KL are both supplied in Tape & Reel (TR) format. The RK73H1HTTCM3243F packaging type is not specified in available documentation. All three parts use the identical 0201 (0603 Metric) package format with matching physical dimensions (0.024" L x 0.012" W, 0.60mm x 0.30mm) and height (0.010" max seated). PCB footprint compatibility is assured across all three parts.

Q: Do all substitute parts meet automotive AEC-Q200 requirements?

A: Yes. The RK73H1HTTCM3243F and AC0201FR-07324KL both carry AEC-Q200 qualification ratings, matching the original part. All three components are suitable for automotive applications requiring this qualification standard.

Q: What is the difference in inventory availability?

A: Current inventory levels are: RK73H1HTTC3243F (887 pcs), RK73H1HTTCM3243F (699 pcs), and AC0201FR-07324KL (1,060 pcs). The YAGEO substitute offers the highest available stock. Inventory levels are subject to change and should be verified at time of procurement.