Equivalent & Substitute Parts for RK73H1HTTC3603D

Part Overview

The RK73H1HTTC3603D is a 360 kOhms ±0.5% thick film chip resistor in 0201 package (0603 metric) rated for 0.05W power dissipation. This component is designed for automotive applications with AEC-Q200 qualification and moisture-resistant construction. The part is classified as "Not For New Designs," indicating it has been superseded. Identifying equivalent substitute parts ensures design continuity and maintains compliance with automotive and reliability standards while sourcing from active product lines.

Substiute Parts

RK73H1HTTC3603D

KOA Speer Electronics, Inc.In Stock: 804RK73H1HTTC3603D Datasheet

Current PartRFQ

RK73H1HTTCM3603D

KOA Speer Electronics, Inc.In Stock: 1158RK73H1HTTCM3603D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC3603D is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Non-negotiable):

• Resistance value: 360 kOhms
• Tolerance: ±0.5%
• Power rating: 0.05W (1/20W)
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C to 155°C

Mechanical Parameters (Non-negotiable):

• Package: 0201 (0603 Metric)
• Composition: Thick Film
• Number of terminations: 2

Compliance Parameters (Non-negotiable):

• AEC-Q200 automotive qualification
• RoHS3 compliance
• MSL 1 rating

Manufacturer Constraint:

• KOA Speer Electronics, Inc. (same manufacturer)

The substitute part RK73H1HTTCM3603D meets all these criteria and differs only in product status (Active vs. Not For New Designs) and the absence of explicit "Moisture Resistant" designation in its feature set, though MSL 1 rating indicates equivalent moisture handling capability.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: RK73H1HTTCM3603D

The RK73H1HTTCM3603D is the direct substitute for RK73H1HTTC3603D. Selection of this substitute is justified on the following engineering grounds:

1. Product Status Alignment: The substitute part carries Active product status, ensuring long-term availability and supply chain continuity. The main part is designated "Not For New Designs," indicating end-of-life trajectory.

2. Electrical Equivalence: All electrical parameters are identical, including resistance value, tolerance, power rating, temperature coefficient, and operating temperature range. No circuit redesign is required.

3. Mechanical Compatibility: Package type, dimensions, and termination configuration are identical. Direct PCB layout compatibility is maintained.

4. Compliance Certification: Both parts maintain AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating. No compliance gaps exist.

5. Manufacturer Continuity: Both parts are manufactured by KOA Speer Electronics, Inc., ensuring consistent quality standards and manufacturing processes within the same product family (RK73H series).

6. Inventory Availability: The substitute part has higher inventory availability (1050 Pcs vs. 754 Pcs), supporting production scheduling and supply security.

Frequently Asked Questions (FAQ)

Q1: Can RK73H1HTTCM3603D be used as a direct replacement for RK73H1HTTC3603D in existing designs?

A: Yes. The substitute part is electrically and mechanically identical across all specified parameters. Direct substitution is possible without circuit modification or PCB redesign. Both parts are from the same manufacturer and series.

Q2: What is the significance of the "Not For New Designs" status on the main part?

A: This designation indicates the part has reached end-of-life and is no longer recommended for new product development. Existing inventory may be available for legacy support, but new designs should use the Active substitute part to ensure long-term supply availability.

Q3: Are there differences in moisture handling between the two parts?

A: Both parts carry MSL 1 (Unlimited) rating, indicating equivalent moisture sensitivity levels. The main part explicitly lists "Moisture Resistant" in its features, while the substitute does not include this explicit designation. However, the identical MSL 1 rating confirms equivalent moisture handling capability.

Q4: Does the substitute part maintain automotive qualification?

A: Yes. RK73H1HTTCM3603D carries AEC-Q200 qualification identical to the main part, maintaining full automotive compliance for applications requiring this standard.

Q5: Are there any packaging differences between the two parts?

A: The main part specifies "Tape & Reel (TR)" packaging, while the substitute part does not specify packaging format in the provided data. Both use identical 0201 (0603 Metric) package type. Packaging format should be confirmed with the supplier for procurement purposes.

Q6: What is the basis for substitution compatibility?

A: Substitution is based on strict equivalence across electrical parameters (resistance, tolerance, power rating, temperature coefficient, operating range), mechanical parameters (package, composition, terminations), and compliance certifications (AEC-Q200, RoHS3, MSL 1). All these parameters are identical between the two parts.