MBR1645G Equivalent & Substitute Parts

Part Overview

The MBR1645G is an active Schottky rectifier diode manufactured by onsemi, rated for 45 V DC reverse voltage and 16 A average rectified current in a through-hole TO-220-2 package. This component is part of the SWITCHMODE™ series and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the Schottky diode rectifier category. Alternative sources and variants are necessary to support supply chain flexibility, inventory availability, and design continuity across manufacturing environments.

Substiute Parts

MBR1645G

onsemiIn Stock: 17047MBR1645G Datasheet

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MBR1645-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 2330MBR1645-E3/45 Datasheet

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STPS1545D

STMicroelectronicsIn Stock: 35289STPS1545D Datasheet

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VS-MBR1645-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 8533VS-MBR1645-M3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBR1645G are qualified based on the following electrical and mechanical criteria:

Primary Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 45 V
• Technology: Schottky
• Mounting Type: Through Hole
• Package / Case: TO-220-2 or TO-220AC (mechanically compatible)
• RoHS Status: ROHS3 Compliant

Secondary Matching Criteria:

• Current - Average Rectified (Io): 16 A (or 15 A minimum for high-current applications)
• Voltage - Forward (Vf) (Max) @ If: 630 mV @ 16 A (or equivalent forward drop characteristics)
• Speed - Fast Recovery: ≤ 500 ns, > 200 mA (Io)
• Current - Reverse Leakage @ Vr: 200 µA @ 45 V

All substitute parts listed maintain electrical equivalence within the specified parameter ranges and are suitable for direct replacement in applications designed for the MBR1645G.

Parameter Comparison

Engineering Selection Recommendations

MBR1645-E3/45 (Vishay General Semiconductor - Diodes Division)

This part is electrically equivalent to the MBR1645G with identical voltage, current, and forward voltage specifications. The primary design consideration is the maximum junction temperature of 150°C compared to 175°C for the MBR1645G. This part is ROHS3 compliant and active in production status. Selection is appropriate for applications where thermal management maintains junction temperatures below 150°C.

STPS1545D (STMicroelectronics)

This part maintains the 45 V reverse voltage rating and fast recovery speed characteristics. The average rectified current is rated at 15 A, which is 1 A lower than the MBR1645G. The forward voltage specification is provided at 30 A rather than 16 A. This part is ROHS3 compliant and active in production status. Selection is appropriate for applications requiring 15 A or less continuous current operation.

VS-MBR1645-M3 (Vishay General Semiconductor - Diodes Division)

This part is electrically equivalent to the MBR1645G with identical voltage, current, and forward voltage specifications. The maximum junction temperature is 150°C. This part includes capacitance specification (1400 pF @ 5 V, 1 MHz) and is ROHS3 compliant with active production status. Selection is appropriate for applications where thermal management maintains junction temperatures below 150°C and where capacitance characteristics are relevant to circuit design.

Frequently Asked Questions (FAQ)

Q: Can the STPS1545D be used as a direct replacement for the MBR1645G?

A: The STPS1545D is electrically compatible for applications requiring 15 A or less. The 1 A reduction in average rectified current rating must be evaluated against actual circuit requirements. All other electrical parameters, including reverse voltage, forward voltage characteristics, and fast recovery speed, are equivalent.

Q: What is the difference between TO-220-2 and TO-220AC package designations?

A: Both designations refer to the same physical through-hole package form factor with two leads. The supplier device package designation (TO-220AC) indicates the specific manufacturing variant, but mechanical and electrical compatibility with TO-220-2 applications is maintained.

Q: Are there thermal considerations when selecting between MBR1645G and the Vishay alternatives?

A: The MBR1645G is rated to 175°C maximum junction temperature, while MBR1645-E3/45 and VS-MBR1645-M3 are rated to 150°C maximum. Applications operating at elevated temperatures must verify that junction temperature remains below 150°C when using Vishay alternatives.

Q: Do all substitute parts meet the same compliance standards as the MBR1645G?

A: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the MBR1645G. All parts carry EAR99 ECCN classification and identical HTSUS codes.

Q: What is the significance of the fast recovery speed specification?

A: The fast recovery speed of ≤ 500 ns at > 200 mA (Io) is maintained across all substitute parts. This specification ensures switching performance is equivalent in high-frequency rectification applications.

Q: Can the MBR1645-E3/45 and VS-MBR1645-M3 be used interchangeably?

A: Both parts share identical electrical specifications (45 V, 16 A, 630 mV forward voltage) and maximum junction temperature (150°C). The VS-MBR1645-M3 includes published capacitance data (1400 pF @ 5 V, 1 MHz), which may be relevant for specific circuit applications. Both are suitable for direct substitution where thermal limits are observed.