RK73B1HTTC330G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC330G is a 33 Ohm ±2% thick film chip resistor rated at 0.05W (1/20W) in 0201 package format, manufactured by KOA Speer Electronics, Inc. This component is designed for automotive applications and meets AEC-Q200 qualification standards. The part is currently classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line.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 to ensure design continuity, maintain supply chain reliability, and transition to active product alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

RK73B1HTTC330G

KOA Speer Electronics, Inc.In Stock: 931RK73B1HTTC330G Datasheet

Current PartRFQ

RK73B1HTTCM330G

KOA Speer Electronics, Inc.In Stock: 1037RK73B1HTTCM330G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC330G is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 33 Ohms (exact match required)
• Tolerance: ±2% (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 format: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)

Compliance & Certification:

• Automotive qualification: AEC-Q200 (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)
• Moisture sensitivity: MSL 1 (exact match required)

Substitute parts must satisfy all parameters listed above without deviation. Parts differing in any electrical, mechanical, or compliance specification are not considered equivalent.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM330G is the direct equivalent substitute for the RK73B1HTTC330G. Both parts are manufactured by KOA Speer Electronics, Inc., within the RK73B series, and satisfy 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 is designated as "Active."

For new designs and ongoing production, the RK73B1HTTCM330G is the appropriate selection. This part maintains full compatibility with existing circuit designs, PCB layouts, and assembly processes. Both parts carry AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 moisture sensitivity rating, ensuring suitability for automotive and industrial applications operating across the -55°C to 155°C temperature range.

The substitution presents no electrical, thermal, or mechanical trade-offs. Selection of the active substitute part ensures access to current manufacturing processes, improved supply chain availability, and alignment with manufacturer product lifecycle management.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM330G be used as a direct replacement for RK73B1HTTC330G in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same resistance value (33 Ohms), tolerance (±2%), power rating (0.05W), package format (0201), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and automotive qualification (AEC-Q200). No circuit redesign or PCB modification is required.

Q: What is the significance of the product status difference?

A: The RK73B1HTTC330G is marked "Not For New Designs," indicating the manufacturer has discontinued active development and promotion of this part number. The RK73B1HTTCM330G carries "Active" status, meaning it is the current production equivalent supported by the manufacturer. For new designs and long-term supply assurance, the active part is the recommended selection.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are ROHS3 compliant, AEC-Q200 qualified, and carry MSL 1 moisture sensitivity rating. Compliance certifications are identical, making either part suitable for automotive and regulated applications.

Q: Does the package format remain the same?

A: Yes. Both parts use the 0201 package format (0603 Metric), 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). PCB footprints and assembly processes are unchanged.

Q: What is the difference in part number nomenclature?

A: The part numbers differ only in the suffix: RK73B1HTTC330G versus RK73B1HTTCM330G. The "M" designation in the substitute part indicates a manufacturing or product line update within the RK73B series. The core specifications remain unchanged.

Q: Is inventory availability a consideration for substitution?

A: Both parts are available in stock. The main part has 877 pieces, and the substitute has 938 pieces. For long-term supply planning, the active substitute part (RK73B1HTTCM330G) is preferable due to its active product status and ongoing manufacturer support.