RK73H1HTTC2490D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC2490D is a 249 Ohm ±0.5% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in the 0201 (0603 Metric) package. This component is designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction.

The RK73H1HTTC2490D carries a product status of "Not For New Designs," indicating it has been superseded in the manufacturer's active product line. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to actively supported alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

RK73H1HTTC2490D

KOA Speer Electronics, Inc.In Stock: 1246RK73H1HTTC2490D Datasheet

Current PartRFQ

RK73H1HTTCM2490D

KOA Speer Electronics, Inc.In Stock: 950RK73H1HTTCM2490D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC2490D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 249 Ohms (exact match required)
• Tolerance: ±0.5% (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 type: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)

Compliance & Certification:

• Automotive qualification: AEC-Q200 (exact match required)
• Moisture resistance: Required
• RoHS compliance: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: MSL 1 (exact match required)

Substitute parts must match all parameters listed above. Deviations in any electrical, mechanical, or compliance parameter disqualify a part from substitution consideration.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM2490D is the direct equivalent substitute for the RK73H1HTTC2490D. Both parts are manufactured by KOA Speer Electronics, Inc., within the RK73H series, and share identical electrical specifications, mechanical dimensions, and automotive compliance certifications.

The primary distinction is product lifecycle status: the RK73H1HTTC2490D is designated "Not For New Designs," while the RK73H1HTTCM2490D carries "Active" status. This indicates the RK73H1HTTCM2490D is the current production equivalent and the recommended selection for new designs and ongoing supply requirements.

Both parts satisfy AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 moisture sensitivity requirements. The electrical performance, thermal characteristics, and mechanical compatibility are identical across all specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM2490D be used as a direct replacement for the RK73H1HTTC2490D in existing designs?

A: Yes. The RK73H1HTTCM2490D is electrically and mechanically equivalent to the RK73H1HTTC2490D. All critical parameters—resistance, tolerance, power rating, temperature coefficient, operating temperature range, package dimensions, and automotive certifications—are identical. Direct substitution is supported without design modification.

Q: What is the significance of the "Not For New Designs" status on the RK73H1HTTC2490D?

A: "Not For New Designs" indicates the part has been superseded in the manufacturer's active product line. While existing inventory remains available, the RK73H1HTTCM2490D is the current production equivalent. New designs should specify the RK73H1HTTCM2490D to ensure long-term supply continuity and manufacturer support.

Q: Are there any differences in packaging between these two parts?

A: Both parts use the 0201 (0603 Metric) package with identical physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). Packaging compatibility is complete.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the RK73H1HTTC2490D and RK73H1HTTCM2490D are AEC-Q200 qualified, ROHS3 compliant, and rated MSL 1 (Unlimited moisture sensitivity). Automotive application requirements are satisfied by both parts.

Q: What is the tolerance specification for these resistors?

A: Both parts are specified at ±0.5% tolerance, ensuring precise resistance values within 248.755 Ohms to 249.245 Ohms at 25°C.

Q: Are these parts suitable for high-temperature automotive applications?

A: Yes. Both parts operate across the -55°C ~ 155°C temperature range with a temperature coefficient of ±200ppm/°C, meeting automotive thermal requirements.