RK73B1HTTC511G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC511G is a 510 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 The part is currently classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line.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

RK73B1HTTC511G

KOA Speer Electronics, Inc.In Stock: 986RK73B1HTTC511G Datasheet

Current PartRFQ

RK73B1HTTCM511G

KOA Speer Electronics, Inc.In Stock: 1179RK73B1HTTCM511G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC511G is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 510 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)
• Termination count: 2 (exact match required)

Compliance & Quality Parameters:

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

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

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM511G is a direct functional equivalent to the RK73B1HTTC511G. 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 lifecycle status: the original part is classified as Not For New Designs, while the substitute is Active.

For new design implementations, the RK73B1HTTCM511G should be selected. This part maintains full compatibility with existing designs while ensuring access to current manufacturing processes and supply chain availability. Both parts carry identical AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 moisture sensitivity rating, confirming suitability for automotive and industrial applications requiring high reliability standards.

The substitute part is available in higher inventory (1072 pieces versus 910 pieces), supporting production continuity and reducing procurement lead time risk.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM511G be used as a direct replacement for RK73B1HTTC511G in existing designs?

A: Yes. Both parts are electrically and mechanically identical. All electrical parameters (510 Ohms, ±2% tolerance, 0.05W rating, ±200ppm/°C temperature coefficient, -55°C to 155°C operating range) and mechanical specifications (0201 package, 0.60mm x 0.30mm dimensions) are equivalent. Automotive AEC-Q200 qualification and ROHS3 compliance are maintained.

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

A: The original part (RK73B1HTTC511G) is marked Not For New Designs, indicating the manufacturer has transitioned this model out of active production. The substitute (RK73B1HTTCM511G) is Active, meaning it is currently manufactured and supported. For new designs, the Active part should be specified to ensure long-term supply availability and manufacturing support.

Q: Are there any package or footprint differences between these parts?

A: No. Both parts use identical 0201 package format (0603 metric equivalent) with dimensions of 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 identical.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both RK73B1HTTC511G and RK73B1HTTCM511G carry AEC-Q200 automotive qualification, confirming suitability for automotive applications requiring high reliability and temperature stability standards.

Q: Is there a difference in moisture sensitivity or handling requirements?

A: No. Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply equally to both parts.