MBR3050CTHC0G Equivalent & Substitute Parts

Part Overview

The MBR3050CTHC0G is a Schottky diode array manufactured by Taiwan Semiconductor Corporation, configured as a 1 Pair Common Cathode arrangement in a TO-220-3 through-hole package. This component is rated for 50 V DC reverse voltage with 30 A average rectified current per diode and operates across a junction temperature range of -55°C to 150°C. The part carries AEC-Q101 automotive qualification and ROHS3 compliance.

Substitute parts become necessary when the primary component experiences extended lead times, inventory constraints, or when design flexibility permits operation within relaxed electrical parameters. The MBR3050CTHC0G remains in active production status; however, equivalent alternatives exist from other manufacturers with comparable or slightly reduced electrical ratings.

Substiute Parts

MBR3050CTHC0G

Taiwan Semiconductor CorporationIn Stock: 955MBR3050CTHC0G Datasheet

Current PartRFQ

MBR20L45CTG

onsemiIn Stock: 1813MBR20L45CTG Datasheet

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STPS40L45CT

STMicroelectronicsIn Stock: 17925STPS40L45CT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MBR3050CTHC0G is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Diode Configuration: 1 Pair Common Cathode (pin-compatible)
• Technology: Schottky (fast recovery characteristics)
• Package / Case: TO-220-3 (mechanical and thermal interface)
• Mounting Type: Through Hole (PCB assembly compatibility)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (switching performance)

Allowable Parameter Relaxation:

• Voltage - DC Reverse (Vr) (Max): Substitute parts may operate at lower voltage ratings provided the application does not exceed the substitute's maximum rating
• Current - Average Rectified (Io) (per Diode): Substitute parts may have reduced current capacity; circuit design must accommodate lower current handling
• Voltage - Forward (Vf) (Max): Variations in forward voltage are acceptable within the operating point of the application
• Current - Reverse Leakage @ Vr: Increased leakage is acceptable provided thermal management remains adequate
• Operating Temperature - Junction: Substitute parts must support the application's required temperature range

The identified substitute parts—MBR20L45CTG (onsemi) and STPS40L45CT (STMicroelectronics)—satisfy the mandatory compatibility criteria while operating at reduced voltage and current ratings compared to the primary part.

Parameter Comparison

Engineering Selection Recommendations

MBR3050CTHC0G (Primary Component) The MBR3050CTHC0G remains the preferred selection for applications requiring the full 50 V reverse voltage rating and 30 A current capacity. This part maintains active production status, carries AEC-Q101 automotive qualification, and is ROHS3 compliant. Use this component when design specifications demand maximum electrical performance within the TO-220-3 package.

STPS40L45CT (STMicroelectronics) - Recommended Substitute The STPS40L45CT is suitable for applications where the circuit design operates at or below 45 V reverse voltage and 20 A average rectified current. This part is in active production status, maintains ROHS3 compliance, and provides the closest current rating to the primary component among available substitutes. The STPS40L45CT is appropriate for designs with reduced electrical requirements or when supply chain constraints affect primary component availability.

MBR20L45CTG (onsemi) - Limited Substitute The MBR20L45CTG carries obsolete product status and is suitable only for applications with significantly reduced current requirements (10 A maximum). This part is not recommended for new designs. Use only when existing inventory exists and circuit operation is confirmed at the reduced 10 A current rating. The obsolete status indicates no ongoing manufacturer support or future availability.

Frequently Asked Questions (FAQ)

Q: Can the MBR20L45CTG replace the MBR3050CTHC0G in all applications?

A: No. The MBR20L45CTG is rated for 10 A average rectified current compared to the MBR3050CTHC0G's 30 A rating. Substitution is limited to applications where circuit current requirements do not exceed 10 A per diode. Additionally, the MBR20L45CTG carries obsolete product status, making it unsuitable for new designs.

Q: What is the voltage derating when using STPS40L45CT instead of MBR3050CTHC0G?

A: The STPS40L45CT operates at a maximum reverse voltage of 45 V compared to the MBR3050CTHC0G's 50 V rating. Applications must operate at or below 45 V to use this substitute. No additional derating is required beyond this voltage limitation.

Q: Are all three parts pin-compatible in the TO-220-3 package?

A: Yes. All three parts—MBR3050CTHC0G, MBR20L45CTG, and STPS40L45CT—use the TO-220-3 package with identical pinout for 1 Pair Common Cathode diode arrays. Direct PCB substitution is mechanically and electrically feasible provided electrical parameter requirements are met.

Q: Does the forward voltage difference affect circuit operation?

A: Forward voltage variations exist among the three parts (770 mV @ 15 A for MBR3050CTHC0G versus 500 mV @ 10 A for MBR20L45CTG and 530 mV @ 20 A for STPS40L45CT). These differences affect power dissipation and thermal performance. Circuit designs must account for forward voltage characteristics at the actual operating current of the application.

Q: Which substitute part is recommended for new automotive designs?

A: The STPS40L45CT is recommended for new designs requiring a substitute. It maintains active production status, ROHS3 compliance, and provides adequate current capacity (20 A) for most applications. The MBR20L45CTG is not suitable for new designs due to obsolete status.

Q: What is the impact of increased reverse leakage current in substitute parts?

A: The STPS40L45CT exhibits 600 µA reverse leakage at 45 V compared to 200 µA for the MBR3050CTHC0G at 50 V. Increased leakage generates additional heat and may affect circuit performance in high-impedance applications. Thermal management and circuit design must accommodate this increased leakage current.

Q: Can the MBR3050CTHC0G be used in place of either substitute part?

A: Yes. The MBR3050CTHC0G can replace either substitute part in any application. Its higher voltage rating (50 V) and current capacity (30 A) provide superior performance margins. Use the primary part when supply availability permits.