RK73B1HTTC331G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC331G is a 330 Ohm ±2% thick film chip resistor rated at 0.05W (1/20W) in 0201 package format (0.60mm x 0.30mm metric). This component is manufactured by KOA Speer Electronics, Inc. and meets automotive 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 The part is currently classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line.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 maintain electrical and mechanical compatibility.

Substiute Parts

RK73B1HTTC331G

KOA Speer Electronics, Inc.In Stock: 780RK73B1HTTC331G Datasheet

Current PartRFQ

RK73B1HTTCM331G

KOA Speer Electronics, Inc.In Stock: 1129RK73B1HTTCM331G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC331G is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 330 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)
• Physical dimensions: 0.024" L x 0.012" W / 0.60mm x 0.30mm (exact match required)
• Height seated maximum: 0.010" / 0.26mm (exact match required)

Compliance & Certification:

• Automotive AEC-Q200 qualification (required for automotive applications)
• RoHS3 compliance (required for regulatory conformance)
• Moisture Sensitivity Level 1 (required for handling and storage compatibility)

Substitute parts must match all electrical, mechanical, and compliance parameters. Differences in product status (active vs. not for new designs) do not affect electrical or mechanical substitutability but may influence long-term availability and design strategy.

Parameter Comparison

Engineering Selection Recommendations

RK73B1HTTCM331G is the direct equivalent substitute for RK73B1HTTC331G. Both parts are manufactured by KOA Speer Electronics, Inc. within the RK73B series and share identical electrical specifications, mechanical dimensions, and automotive compliance certifications.

The primary distinction is product status: RK73B1HTTC331G is classified as Not For New Designs, while RK73B1HTTCM331G is Active. This status difference reflects the manufacturer's product lifecycle management and indicates that RK73B1HTTCM331G represents the current production alternative.

For new design implementations, RK73B1HTTCM331G is the appropriate selection. For existing designs currently using RK73B1HTTC331G, substitution with RK73B1HTTCM331G is electrically and mechanically transparent, requiring no circuit modifications or PCB layout changes.

Both parts maintain AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating, ensuring compatibility with automotive and industrial applications requiring these certifications.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM331G be used as a direct replacement for RK73B1HTTC331G in existing designs?

A: Yes. RK73B1HTTCM331G is electrically and mechanically identical to RK73B1HTTC331G. All electrical parameters (resistance, tolerance, power rating, temperature coefficient, operating range) and mechanical dimensions (0201 package, 0.60mm x 0.30mm) are identical. No circuit modifications or PCB layout changes are required.

Q: What is the significance of the "Not For New Designs" status on RK73B1HTTC331G?

A: This status indicates the part has been superseded in the manufacturer's active product line. While existing inventory remains available and functional, the manufacturer recommends using RK73B1HTTCM331G for new design implementations to ensure long-term supply chain continuity and access to current production support.

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

A: No. Both parts are AEC-Q200 qualified for automotive applications, ROHS3 compliant, and carry MSL 1 (Unlimited) moisture sensitivity rating. Compliance certifications are identical.

Q: What is the difference between the part numbers RK73B1HTTC331G and RK73B1HTTCM331G?

A: The part numbers differ only in the suffix: "C" versus "CM". This suffix variation reflects the manufacturer's internal product designation and lifecycle management. The "M" designation in RK73B1HTTCM331G indicates the active production variant. Electrical and mechanical specifications remain identical.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. Both parts use identical 0201 package format with matching physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm) and height specifications (0.010" / 0.26mm maximum seated height). PCB footprints, pick-and-place programming, and reflow profiles require no modification.

Q: Are there any temperature or environmental performance differences?

A: No. Both parts operate across the identical temperature range (-55°C ~ 155°C) with identical temperature coefficient (±200ppm/°C). Environmental performance and thermal characteristics are equivalent.