RK73H1HTTC4120F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC4120F is a 412 Ohm ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in a 0201 (0603 Metric) surface mount package. This component meets AEC-Q200 automotive qualification standards and incorporates moisture-resistant construction suitable for automotive and industrial applications operating across -55°C to 155°C.

The RK73H1HTTC4120F carries a "Not For New Designs" product status, indicating that KOA Speer Electronics has transitioned this part to end-of-life. Identifying equivalent and substitute parts is necessary to maintain design continuity, support existing production runs, and ensure long-term component availability for field service and repair applications.

Substiute Parts

RK73H1HTTC4120F

KOA Speer Electronics, Inc.In Stock: 744RK73H1HTTC4120F Datasheet

Current PartRFQ

RK73H1HTTCM4120F

KOA Speer Electronics, Inc.In Stock: 1036RK73H1HTTCM4120F Datasheet

MFR RecommendedRFQ

AC0201FR-07412RL

YAGEOIn Stock: 723AC0201FR-07412RL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC4120F are qualified based on strict electrical and mechanical parameter matching:

Substitution Criteria:

• Resistance value: 412 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Package: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)
• Automotive qualification: AEC-Q200 (exact match required)
• Moisture resistance: Present (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)
• MSL rating: 1 (Unlimited) (exact match required)

Substitute parts are grouped into two categories: manufacturer-recommended alternatives from KOA Speer Electronics and direct cross-reference parts from alternative manufacturers meeting identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM4120F (KOA Speer Electronics, Inc.)

This part is the manufacturer-recommended substitute from KOA Speer Electronics. It maintains identical electrical specifications, package dimensions, and automotive AEC-Q200 qualification as the original RK73H1HTTC4120F. The primary distinction is active product status, ensuring continued availability and manufacturing support. This part is suitable for new production runs and field replacements where KOA Speer sourcing is preferred.

AC0201FR-07412RL (YAGEO)

This part is a direct cross-reference from YAGEO, meeting all electrical and mechanical parameters of the RK73H1HTTC4120F. It carries active product status and maintains AEC-Q200 automotive qualification, ROHS3 compliance, and identical package specifications. This part provides an alternative sourcing channel and is suitable for applications where multi-source qualification is required or where YAGEO supply chain availability is advantageous.

Both substitute parts are functionally and mechanically interchangeable with the original component based on the provided specifications.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM4120F be used as a direct replacement for RK73H1HTTC4120F?

A: Yes. Both parts share identical resistance (412 Ohms), tolerance (±1%), power rating (0.05W), package (0201), composition (thick film), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), AEC-Q200 rating, moisture resistance, RoHS compliance, and MSL rating. The primary difference is product status; RK73H1HTTCM4120F is active while RK73H1HTTC4120F is not for new designs.

Q: Is AC0201FR-07412RL from YAGEO compatible with designs using RK73H1HTTC4120F?

A: Yes. AC0201FR-07412RL meets all electrical and mechanical specifications of RK73H1HTTC4120F, including resistance, tolerance, power rating, package dimensions, composition, temperature coefficient, operating temperature range, AEC-Q200 qualification, moisture resistance, RoHS compliance, and MSL rating. It is suitable for direct substitution in automotive and industrial applications.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by exact matching of: resistance value (412 Ohms), tolerance (±1%), power rating (0.05W), package type (0201), composition (thick film), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), AEC-Q200 automotive qualification, moisture resistance, RoHS compliance status, and MSL rating (1 - Unlimited).

Q: Why is the RK73H1HTTC4120F marked "Not For New Designs"?

A: This designation indicates that KOA Speer Electronics has transitioned this part to end-of-life status. Existing inventory remains available, but the manufacturer recommends using active alternatives such as RK73H1HTTCM4120F for new product development and long-term production planning.

Q: Are there any differences in package dimensions between the substitute parts?

A: No. All three parts share identical package dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) with a maximum seated height of 0.010" (0.26mm). They are mechanically interchangeable on PCB layouts designed for 0201 (0603 Metric) components.

Q: What is the significance of AEC-Q200 qualification?

A: AEC-Q200 is an automotive industry standard qualification that certifies component reliability under automotive operating conditions. All three parts meet this standard, confirming suitability for automotive applications requiring temperature cycling, vibration resistance, and long-term reliability.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All three parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions. These components do not require special moisture control during storage, handling, or assembly.