RK73B1HTTC135J Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC135J is a 1.3 MOhms ±5% thick film chip resistor manufactured by KOA Speer Electronics, Inc. in the 0201 (0603 Metric) package format. This component is rated for automotive applications under AEC-Q200 standards with a power rating of 0.05W (1/20W) and operates across a temperature range of -55°C to 155°C.

The RK73B1HTTC135J carries a product status designation of "Not For New Designs," indicating that this part number has been superseded. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to actively supported component alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

RK73B1HTTC135J

KOA Speer Electronics, Inc.In Stock: 850RK73B1HTTC135J Datasheet

Current PartRFQ

RK73B1HTTCM135J

KOA Speer Electronics, Inc.In Stock: 759RK73B1HTTCM135J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC135J is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 1.3 MOhms
• Tolerance: ±5%
• Power rating: 0.05W (1/20W)
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 155°C

Mechanical Parameters:

• Package format: 0201 (0603 Metric)
• Number of terminations: 2
• Physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm)
• Maximum seated height: 0.010" (0.26mm)

Compliance & Certification:

• Automotive AEC-Q200 rating
• ROHS3 compliance
• Moisture Sensitivity Level 1

Substitute parts must match all electrical specifications, maintain identical package geometry, and retain full automotive qualification. Composition (thick film) and manufacturer (KOA Speer Electronics, Inc.) remain consistent across the substitution group.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM135J is the direct substitute for the RK73B1HTTC135J. Both components are manufactured by KOA Speer Electronics, Inc. within the RK73B series and provide identical electrical and mechanical performance.

The primary distinction between these parts is product lifecycle status: RK73B1HTTC135J is designated "Not For New Designs," while RK73B1HTTCM135J carries "Active" status. This indicates that RK73B1HTTCM135J represents the current production variant and is the recommended selection for ongoing designs and procurement.

Both parts satisfy identical compliance requirements, including AEC-Q200 automotive qualification, ROHS3 compliance, and unlimited moisture sensitivity rating (MSL 1). Electrical parameters, package geometry, and thermal characteristics are fully equivalent, ensuring direct functional interchangeability in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM135J be used as a direct replacement for RK73B1HTTC135J?

A: Yes. Both parts are electrically and mechanically identical. They share the same resistance value (1.3 MOhms), tolerance (±5%), power rating (0.05W), package format (0201), temperature coefficient (±200ppm/°C), and operating temperature range (-55°C ~ 155°C). All compliance certifications, including AEC-Q200 and ROHS3, are equivalent.

Q: Why is RK73B1HTTC135J marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status in the manufacturer's product portfolio. RK73B1HTTCM135J is the active replacement that maintains full functional equivalence while ensuring continued supply chain support and manufacturing availability.

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

A: No. Both components use the 0201 (0603 Metric) package with identical physical 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 interchangeable.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both RK73B1HTTC135J and RK73B1HTTCM135J carry AEC-Q200 automotive qualification, confirming suitability for automotive-grade applications across the specified operating temperature range of -55°C to 155°C.

Q: What is the moisture sensitivity rating for these components?

A: Both parts have Moisture Sensitivity Level (MSL) 1, which indicates unlimited shelf life and no special moisture control requirements during storage or handling.