RK73H1HTTC7R50F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC7R50F is a 7.5 Ohm ±1% 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 The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and transition to active product alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

RK73H1HTTC7R50F

KOA Speer Electronics, Inc.In Stock: 15485RK73H1HTTC7R50F Datasheet

Current PartRFQ

RK73H1HTTCM7R50F

KOA Speer Electronics, Inc.In Stock: 1182RK73H1HTTCM7R50F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC7R50F is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Non-Negotiable):

• Resistance value: 7.5 Ohms (exact match required)
• Tolerance: ±1% (substitute must not exceed this tolerance)
• Power rating: 0.05W minimum (equal or higher acceptable)
• Temperature coefficient: ±400ppm/°C (equal or better required)
• Operating temperature range: -55°C to 155°C minimum (equal or wider acceptable)

Mechanical Parameters (Non-Negotiable):

• Package: 0201 (0603 Metric) - exact match required for PCB footprint compatibility
• Composition: Thick Film (determines frequency response and noise characteristics)
• Number of terminations: 2 (standard for chip resistors)

Compliance & Certification Parameters:

• Automotive rating: AEC-Q200 (required for automotive applications)
• RoHS status: ROHS3 Compliant (regulatory requirement)
• Moisture Sensitivity Level: MSL 1 (Unlimited) - equal or better required

Substitute parts must satisfy all parameters listed above. Deviations in any critical parameter disqualify a part from substitution consideration.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM7R50F is a direct equivalent substitute for the RK73H1HTTC7R50F. Both parts are manufactured by KOA Speer Electronics, Inc., belong to the same RK73H series, and share identical electrical, mechanical, and compliance specifications.

Primary Advantage of Substitution: The RK73H1HTTCM7R50F carries "Active" product status, whereas the main part is designated "Not For New Designs." This distinction indicates that the substitute part represents the current production offering from the manufacturer and is the recommended component for ongoing and future designs.

Compliance Verification: Both parts maintain full AEC-Q200 automotive qualification, ROHS3 compliance, and REACH unaffected status. No regulatory or certification gaps exist between the main part and substitute.

Supply Chain Consideration: The substitute part (RK73H1HTTCM7R50F) has 1,082 units in stock, providing adequate availability for production requirements. The main part (RK73H1HTTC7R50F) has 15,383 units in stock but is not recommended for new designs due to its obsolescence status.

Design Transition: For new designs, the RK73H1HTTCM7R50F should be selected. For existing designs currently using RK73H1HTTC7R50F, direct substitution with RK73H1HTTCM7R50F is electrically and mechanically valid with no design modifications required.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM7R50F be used as a direct replacement for RK73H1HTTC7R50F on existing PCBs?

A: Yes. Both parts are identical in package (0201), footprint dimensions (0.024" L x 0.012" W), and electrical specifications (7.5 Ohms ±1%, 0.05W, ±400ppm/°C). No PCB layout modifications are required.

Q: What is the difference between these two part numbers?

A: The primary difference is product status. RK73H1HTTC7R50F is "Not For New Designs," while RK73H1HTTCM7R50F is "Active." The electrical and mechanical specifications are identical. The suffix variation in the part number reflects the manufacturer's product line evolution.

Q: Are both parts AEC-Q200 qualified?

A: Yes. Both RK73H1HTTC7R50F and RK73H1HTTCM7R50F carry AEC-Q200 automotive qualification and are suitable for automotive applications requiring this certification.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Which part should be specified for new automotive designs?

A: RK73H1HTTCM7R50F should be specified for new designs due to its Active product status. This ensures long-term supply availability and manufacturer support.

Q: Are there any temperature or tolerance differences between these parts?

A: No. Both parts operate across -55°C to 155°C, maintain ±1% tolerance, and exhibit ±400ppm/°C temperature coefficient.

Q: Can the substitute part handle the same power dissipation?

A: Yes. Both parts are rated for 0.05W (1/20W) power dissipation and are suitable for identical thermal environments.