RK73B1HTTC124G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC124G is a 120 kOhms ±2% thick film chip resistor in 0201 package (0603 Metric) rated for 0.05W power dissipation. 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 The part is currently classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line.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 status alternatives where applicable.

Substiute Parts

RK73B1HTTC124G

KOA Speer Electronics, Inc.In Stock: 955RK73B1HTTC124G Datasheet

Current PartRFQ

RK73B1HTTCM124G

KOA Speer Electronics, Inc.In Stock: 742RK73B1HTTCM124G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73B1HTTC124G must satisfy the following criteria to ensure functional and mechanical compatibility:

Electrical Parameters (Critical):

• Resistance value: 120 kOhms
• Tolerance: ±2%
• Power rating: 0.05W minimum
• Temperature coefficient: ±200ppm/°C

Mechanical Parameters (Critical):

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

Material & Composition (Critical):

• Thick film construction

Compliance & Environmental (Required):

• AEC-Q200 automotive qualification
• RoHS3 compliance
• MSL 1 rating
• Operating temperature range: -55°C ~ 155°C

Substitute parts must match all critical parameters. Variations in product status (Active vs. Not For New Designs) do not affect electrical or mechanical compatibility but indicate manufacturing lifecycle stage.

Parameter Comparison

Engineering Selection Recommendations

RK73B1HTTCM124G is the direct substitute for RK73B1HTTC124G. All electrical, mechanical, and environmental parameters are identical. The primary distinction is product lifecycle status: RK73B1HTTCM124G is classified as Active, while RK73B1HTTC124G is Not For New Designs.

Selection Basis:

1. Electrical Compatibility: Both parts deliver identical resistance (120 kOhms), tolerance (±2%), power rating (0.05W), and temperature coefficient (±200ppm/°C). Circuits designed for RK73B1HTTC124G function identically with RK73B1HTTCM124G.

2. Mechanical Compatibility: Package dimensions, footprint, and termination configuration are identical. PCB layouts require no modification.

3. Compliance & Certification: Both parts meet AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating. Operating temperature range (-55°C ~ 155°C) is identical.

4. Supply Chain Continuity: RK73B1HTTCM124G is currently in active production with 685 units in stock, ensuring long-term availability compared to the obsolescent RK73B1HTTC124G.

For new designs or redesigns, RK73B1HTTCM124G is the appropriate selection. For existing designs currently using RK73B1HTTC124G, direct substitution with RK73B1HTTCM124G requires no circuit or layout modifications.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM124G be used as a direct replacement for RK73B1HTTC124G in existing designs?

A: Yes. All electrical parameters (resistance, tolerance, power rating, temperature coefficient), mechanical dimensions (0201 package), and compliance certifications (AEC-Q200, ROHS3) are identical. No circuit modifications or PCB layout changes are required.

Q: What is the difference between RK73B1HTTC124G and RK73B1HTTCM124G?

A: The parts are electrically and mechanically identical. The primary difference is product status: RK73B1HTTC124G is classified as "Not For New Designs" (obsolescent), while RK73B1HTTCM124G is "Active" (current production). The "M" designation in RK73B1HTTCM124G indicates the active variant.

Q: Are there any packaging differences between these parts?

A: No. Both parts are supplied in 0201 (0603 Metric) package 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). Both are suitable for automated assembly.

Q: Do both parts meet automotive standards?

A: Yes. Both RK73B1HTTC124G and RK73B1HTTCM124G are AEC-Q200 qualified for automotive applications and operate across the identical temperature range of -55°C to 155°C.

Q: What is the MSL rating for these resistors?

A: Both parts have MSL 1 (Unlimited) rating, indicating no moisture sensitivity limitations during storage or handling.

Q: Are these parts RoHS compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic components.

Q: Which part should be specified for new designs?

A: RK73B1HTTCM124G should be specified for new designs, as it is in active production status. RK73B1HTTC124G is not recommended for new designs due to its obsolescent status.