Equivalent & Substitute Parts for RK73B1HTTC2R4J

Part Overview

The RK73B1HTTC2R4J is a 2.4 Ohm, ±5% tolerance, 0.05W (1/20W) 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 an operating temperature range of -55°C to 155°C. The part is currently classified as "Not For New Designs," indicating it has been superseded. Identifying equivalent and substitute parts is necessary to support existing designs, ensure supply chain continuity, and evaluate active alternatives that meet the same electrical and mechanical requirements.

Substiute Parts

RK73B1HTTC2R4J

KOA Speer Electronics, Inc.In Stock: 1102RK73B1HTTC2R4J Datasheet

Current PartRFQ

RK73B1HTTCM2R4J

KOA Speer Electronics, Inc.In Stock: 907RK73B1HTTCM2R4J Datasheet

MFR RecommendedRFQ

RMCF0201FT2R00

Stackpole Electronics IncIn Stock: 953RMCF0201FT2R00 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC2R4J is determined by the following critical parameters:

Primary Substitution Criteria:

• Resistance value within acceptable circuit tolerance
• Power rating equal to or greater than 0.05W
• Package / Case format: 0201 (0603 Metric)
• Operating temperature range: minimum -55°C to 155°C
• Composition: Thick Film
• Temperature coefficient: ±400ppm/°C or better
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Substitute Categories:

Category 1: Direct Equivalent (MFR Recommended) RK73B1HTTCM2R4J from KOA Speer Electronics, Inc. maintains identical electrical specifications (2.4 Ohms ±5%, 0.05W) and mechanical dimensions. This part is the manufacturer-recommended successor with Active product status, making it the primary replacement for new procurement while supporting existing designs.

Category 2: Upgrade Substitute RMCF0201FT2R00 from Stackpole Electronics Inc. provides improved tolerance (±1% versus ±5%) while maintaining the same package, power rating, and temperature characteristics. The resistance value differs at 2 Ohms versus 2.4 Ohms. This substitution is valid only when circuit design permits the lower resistance value and the tighter tolerance is beneficial or required.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement in Existing Designs: Select RK73B1HTTCM2R4J. This part is the manufacturer-recommended equivalent from KOA Speer Electronics, Inc., maintaining identical electrical and mechanical specifications to the original RK73B1HTTC2R4J. Active product status ensures long-term availability and supply chain stability. All compliance certifications (ROHS3, AEC-Q200, MSL 1) are maintained.

For New Designs or Performance Enhancement: RMCF0201FT2R00 from Stackpole Electronics Inc. is suitable when circuit design accommodates a 2 Ohm resistance value and the improved ±1% tolerance provides circuit performance benefits. This part maintains all critical parameters including package format, power rating, temperature range, and automotive AEC-Q200 certification. The maximum seated height increases by 0.001" (0.02mm), which must be verified against PCB layout constraints.

Supply Chain Considerations: Current inventory levels support both substitution paths: RK73B1HTTCM2R4J (882 Pcs), RMCF0201FT2R00 (864 Pcs), and original RK73B1HTTC2R4J (1036 Pcs). Active product status for both substitute parts ensures continued availability for production requirements.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM2R4J be used as a direct drop-in replacement for RK73B1HTTC2R4J? A: Yes. RK73B1HTTCM2R4J is the manufacturer-recommended equivalent with identical resistance (2.4 Ohms ±5%), power rating (0.05W), package (0201), temperature range (-55°C to 155°C), and all compliance ratings. The only difference is active product status versus "Not For New Designs" classification.

Q: What is the key difference between RK73B1HTTCM2R4J and RMCF0201FT2R00? A: The primary difference is resistance value: RK73B1HTTCM2R4J is 2.4 Ohms ±5%, while RMCF0201FT2R00 is 2 Ohms ±1%. Both share identical package, power rating, temperature range, and AEC-Q200 automotive certification. RMCF0201FT2R00 offers tighter tolerance but requires circuit design verification for the lower resistance value.

Q: Are all substitute parts AEC-Q200 automotive rated? A: Yes. RK73B1HTTCM2R4J and RMCF0201FT2R00 both carry AEC-Q200 automotive qualification, matching the original RK73B1HTTC2R4J specification.

Q: Does the height difference between RK73B1HTTCM2R4J (0.010" max) and RMCF0201FT2R00 (0.011" max) affect PCB assembly? A: The height difference is 0.001" (0.02mm). This must be evaluated against specific PCB layout and assembly process requirements. For most applications, this variance is within standard manufacturing tolerances, but verification against design constraints is necessary.

Q: Are all parts RoHS3 compliant? A: Yes. RK73B1HTTC2R4J, RK73B1HTTCM2R4J, and RMCF0201FT2R00 are all ROHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level).

Q: Which substitute should be selected for new design projects? A: RK73B1HTTCM2R4J is recommended for new designs as it maintains all original specifications with Active product status. RMCF0201FT2R00 is an alternative if the 2 Ohm resistance value and ±1% tolerance align with circuit requirements.