RK73B1HTTC2R0J Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC2R0J is a 2 Ohm, ±5% tolerance, 0.05W (1/20W) chip resistor in 0201 package (0603 Metric) manufactured by KOA Speer Electronics, Inc. This automotive-grade thick film resistor meets AEC-Q200 qualification standards and operates across -55°C to 155°C. The part is currently classified as Not For New Designs, necessitating identification of equivalent alternatives for ongoing production and new design applications. Substitute parts must maintain identical electrical specifications and mechanical compatibility while meeting current product status requirements.

Substiute Parts

RK73B1HTTC2R0J

KOA Speer Electronics, Inc.In Stock: 22634RK73B1HTTC2R0J Datasheet

Current PartRFQ

RK73B1HTTCM2R0J

KOA Speer Electronics, Inc.In Stock: 894RK73B1HTTCM2R0J Datasheet

MFR RecommendedRFQ

RMCF0201FT2R00

Stackpole Electronics IncIn Stock: 953RMCF0201FT2R00 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC2R0J is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 2 Ohms (exact match required)
• Power Rating: 0.05W / 1/20W (exact match required)
• Package / Case: 0201 (0603 Metric) (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (minimum requirement)
• Composition: Thick Film (exact match required)
• Temperature Coefficient: ±400ppm/°C (exact match required)

Allowable Variation Parameters:

• Tolerance: May be equal or tighter (±5% or better)
• Product Status: Active status preferred for new designs; Not For New Designs acceptable for legacy support
• Automotive Rating: AEC-Q200 maintained across all substitutes
• RoHS / REACH Compliance: ROHS3 Compliant and REACH Unaffected maintained

Two substitute parts meet these criteria: RK73B1HTTCM2R0J (direct equivalent from same manufacturer) and RMCF0201FT2R00 (upgrade option with improved tolerance).

Parameter Comparison

Engineering Selection Recommendations

For Legacy Support and Existing Designs: RK73B1HTTCM2R0J is the manufacturer-recommended substitute. This part maintains identical electrical and mechanical specifications while offering Active product status. Both parts originate from KOA Speer Electronics, Inc., ensuring consistent manufacturing processes and quality standards. This option is suitable for production continuation of existing designs without circuit modification.

For New Design Implementation: RMCF0201FT2R00 from Stackpole Electronics Inc is the upgrade option. This part provides tighter tolerance (±1% versus ±5%), improving circuit accuracy while maintaining all other critical parameters. Active product status ensures long-term availability. The marginal height increase (0.011" versus 0.010") remains within standard PCB assembly tolerances for 0201 packages. This option is appropriate for new designs requiring enhanced precision.

Compliance Considerations: All three parts maintain AEC-Q200 automotive qualification, ROHS3 compliance, and REACH unaffected status. MSL 1 rating (Unlimited) applies across all options, eliminating moisture sensitivity constraints in storage and handling.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM2R0J be used as a direct drop-in replacement for RK73B1HTTC2R0J? A: Yes. Both parts share identical resistance value (2 Ohms), tolerance (±5%), power rating (0.05W), package (0201), temperature coefficient (±400ppm/°C), and operating range (-55°C ~ 155°C). Mechanical dimensions and electrical performance are equivalent.

Q: What is the primary difference between RK73B1HTTCM2R0J and RMCF0201FT2R00? A: The primary difference is tolerance specification. RK73B1HTTCM2R0J maintains ±5% tolerance matching the original part, while RMCF0201FT2R00 offers ±1% tolerance. Both meet all other electrical and mechanical requirements. The RMCF option provides improved circuit accuracy at the cost of a different manufacturer source.

Q: Is the height difference between RK73B1HTTC2R0J (0.010") and RMCF0201FT2R00 (0.011") significant? A: No. The 0.001" (0.02mm) height difference is within standard PCB assembly tolerances for 0201 package components. This variation does not affect board-level compatibility or assembly processes.

Q: Why is RK73B1HTTC2R0J marked as Not For New Designs? A: This designation indicates the part is in mature or end-of-life status from the manufacturer. RK73B1HTTCM2R0J (Active status) or RMCF0201FT2R00 (Active status) are recommended for new design implementations to ensure long-term supply availability.

Q: Are all three parts AEC-Q200 qualified? A: Yes. RK73B1HTTC2R0J, RK73B1HTTCM2R0J, and RMCF0201FT2R00 all carry AEC-Q200 automotive qualification, meeting automotive industry reliability standards.

Q: Can RMCF0201FT2R00 be used in applications requiring ±5% tolerance? A: Yes. RMCF0201FT2R00 with ±1% tolerance exceeds the ±5% requirement, providing superior accuracy. It is suitable for any application accepting ±5% or tighter tolerance specifications.

Q: What is the MSL rating for all substitute parts? A: All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage, handling, or assembly processes.