RK73H1HTTC3573D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC3573D is a 357 kOhms ±0.5% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in a 0201 (0603 Metric) package. This component is designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction. The part is currently classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts is necessary for ongoing support of legacy systems and for applications where this specific part number remains in active use.

Substiute Parts

RK73H1HTTC3573D

KOA Speer Electronics, Inc.In Stock: 1190RK73H1HTTC3573D Datasheet

Current PartRFQ

RK73H1HTTCM3573D

KOA Speer Electronics, Inc.In Stock: 933RK73H1HTTCM3573D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC3573D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 357 kOhms (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 / Case: 0201 (0603 Metric) (exact match required)
• Physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) (exact match required)
• Height - Seated (Max): 0.010" (0.26mm) (exact match required)
• Number of terminations: 2 (exact match required)

Compliance & Quality Parameters:

• Automotive rating: AEC-Q200 (exact match required)
• Composition: Thick Film (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: MSL 1 (Unlimited) (exact match required)

Substitute parts must satisfy all parameters listed above to ensure functional and mechanical compatibility in applications originally designed for the RK73H1HTTC3573D.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM3573D is the direct substitute for the RK73H1HTTC3573D. Both parts are manufactured by KOA Speer Electronics, Inc., within the RK73H series, and share identical electrical, mechanical, and compliance specifications. The primary distinction is product status: the original part is classified as "Not For New Designs," while the substitute part maintains "Active" status.

The substitute part RK73H1HTTCM3573D maintains full compliance with ROHS3 and AEC-Q200 automotive qualification standards. Both parts are MSL 1 (Unlimited moisture sensitivity level), indicating no special moisture handling requirements during storage or assembly. The identical operating temperature range (-55°C ~ 155°C), temperature coefficient (±200ppm/°C), and all electrical parameters ensure functional equivalence in circuit applications.

Selection of the RK73H1HTTCM3573D is appropriate for applications requiring ongoing component availability and manufacturer support, as this part maintains active production status.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM3573D be used as a direct replacement for the RK73H1HTTC3573D?

A: Yes. Both parts are electrically and mechanically identical, with matching resistance (357 kOhms), tolerance (±0.5%), power rating (0.05W), package (0201), and all compliance certifications (AEC-Q200, ROHS3). The substitute part is the current active equivalent.

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

A: The RK73H1HTTCM3573D is the active production equivalent of the RK73H1HTTC3573D. The original part is designated "Not For New Designs," while the substitute maintains "Active" product status. All technical specifications remain identical.

Q: Are there any packaging differences between these 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 height (0.010" / 0.26mm maximum seated height). The original part is supplied in Tape & Reel (TR) packaging; packaging information for the substitute is not specified in available data.

Q: Do these parts meet automotive qualification requirements?

A: Yes. Both parts carry AEC-Q200 automotive qualification and are suitable for automotive applications. Both maintain ROHS3 compliance and REACH Unaffected status.

Q: What is the moisture sensitivity level for these resistors?

A: Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage practices are sufficient; no special moisture control measures are required.

Q: Can I use these parts interchangeably in existing designs?

A: Yes. The RK73H1HTTCM3573D provides functional and mechanical equivalence to the RK73H1HTTC3573D across all specified parameters, enabling direct substitution in circuit designs originally specified for the legacy part number.