MBR2045CTG Equivalent & Substitute Parts

Part Overview

The MBR2045CTG is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with a maximum reverse voltage of 45 V and average rectified current of 10 A per diode. The device is packaged in TO-220-3 through-hole configuration and operates across a junction temperature range of -65°C to 175°C. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io) (per Diode)	10 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 10 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V
Operating Temperature - Junction	-65°C ~ 175°C
Mounting Type	Through Hole
Package / Case	TO-220-3
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MBR2045CTG is determined by the following critical parameters:

Primary Substitution Criteria:

Diode configuration: 1 pair common cathode
Technology: Schottky
Package / Case: TO-220-3
Mounting type: Through hole
Voltage - DC Reverse (Vr) (Max): 45 V minimum
Current - Average Rectified (Io) (per Diode): 10 A minimum
Speed: Fast recovery ≤ 500 ns, > 200 mA (Io)

Acceptable Parameter Variations:

Forward voltage (Vf) may vary within typical Schottky diode ranges
Reverse leakage current may vary within acceptable limits
Operating temperature range may differ, provided maximum junction temperature is adequate
Product status may be active (preferred for new designs)

Substitute parts are grouped into two categories: direct equivalents matching all critical parameters, and parametric equivalents with enhanced current ratings or voltage specifications that maintain backward compatibility.

Parameter Comparison

Parameter	MBR2045CTG (Main)	STPS2045CT	VS-20CTQ045HN3	VS-MBR2045CT-M3	STPS40L45CT	MBR2040CT
Manufacturer	onsemi	STMicroelectronics	Vishay	Vishay	STMicroelectronics	Diodes Incorporated
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V	45 V	40 V
Current - Average Rectified (Io) (per Diode)	10 A	10 A	10 A	10 A	20 A	20 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 10 A	570 mV @ 10 A	640 mV @ 10 A	840 mV @ 20 A	530 mV @ 20 A	840 mV @ 20 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V	100 µA @ 45 V	2 mA @ 45 V	100 µA @ 45 V	600 µA @ 45 V	100 µA @ 40 V
Operating Temperature - Junction	-65°C ~ 175°C	175°C (Max)	-55°C ~ 175°C	-65°C ~ 150°C	150°C (Max)	-55°C ~ 150°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Direct Replacement):

STPS2045CT and VS-MBR2045CT-M3 are direct parametric equivalents to the MBR2045CTG. Both devices maintain identical voltage and current ratings (45 V, 10 A), matching forward voltage characteristics, and fast recovery speed specifications. Both are active products with ROHS3 compliance, providing long-term availability and regulatory alignment. STPS2045CT is manufactured by STMicroelectronics with 25,100 units in stock. VS-MBR2045CT-M3 is manufactured by Vishay with 6,243 units in stock.

Enhanced Current Rating Substitutes (For Upgraded Performance):

STPS40L45CT (STMicroelectronics) and MBR2040CT (Diodes Incorporated) provide higher current ratings of 20 A per diode while maintaining 45 V reverse voltage capability. These parts are suitable for applications requiring increased current capacity. STPS40L45CT offers superior forward voltage characteristics (530 mV @ 20 A) and has 17,860 units in stock. MBR2040CT operates at 40 V maximum reverse voltage with 1,516 units in stock.

Automotive-Grade Option:

VS-20CTQ045HN3 (Vishay) is qualified to AEC-Q101 automotive standards and maintains identical electrical specifications to the MBR2045CTG (45 V, 10 A). This part is suitable for automotive applications requiring qualified components.

Compliance Considerations:

All active substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The MBR2045CTG is classified as obsolete; therefore, migration to an active substitute part is recommended for new designs and long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can STPS2045CT directly replace MBR2045CTG without circuit modifications?

A: Yes. STPS2045CT maintains identical voltage (45 V), current (10 A), forward voltage (570 mV @ 10 A), and fast recovery speed specifications. Both are configured as 1 pair common cathode in TO-220-3 packaging. No circuit modifications are required.

Q: What is the difference between MBR2045CTG and STPS40L45CT?

A: STPS40L45CT has a higher current rating of 20 A per diode compared to 10 A for MBR2045CTG. Both maintain 45 V reverse voltage. STPS40L45CT offers lower forward voltage (530 mV @ 20 A). STPS40L45CT is suitable for applications requiring higher current capacity while maintaining the same voltage specification.

Q: Is VS-20CTQ045HN3 suitable for automotive applications?

A: Yes. VS-20CTQ045HN3 is qualified to AEC-Q101 automotive standards. It maintains identical electrical specifications to MBR2045CTG (45 V, 10 A) and is packaged in TO-220-3 configuration.

Q: Why is MBR2040CT listed as a substitute if it has only 40 V rating?

A: MBR2040CT is listed as a parametric equivalent with enhanced current rating (20 A). The 40 V rating is lower than the 45 V specification of MBR2045CTG. MBR2040CT is suitable only for applications where the circuit operates at 40 V or below. Verify circuit voltage requirements before selection.

Q: What is the difference in reverse leakage current between substitute parts?

A: Reverse leakage varies across substitutes. MBR2045CTG, STPS2045CT, and VS-MBR2045CT-M3 specify 100 µA @ 45 V. VS-20CTQ045HN3 specifies 2 mA @ 45 V. STPS40L45CT specifies 600 µA @ 45 V. Higher leakage current may affect circuit performance in low-current applications; verify leakage specifications against circuit requirements.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. All listed substitute parts are packaged in TO-220-3 through-hole configuration, maintaining mechanical and electrical compatibility with the MBR2045CTG footprint.

Q: What is the operating temperature range difference between substitutes?

A: MBR2045CTG operates -65°C to 175°C. STPS2045CT specifies 175°C maximum. VS-20CTQ045HN3 operates -55°C to 175°C. VS-MBR2045CT-M3 operates -65°C to 150°C. STPS40L45CT specifies 150°C maximum. MBR2040CT operates -55°C to 150°C. Verify application temperature requirements against each substitute's operating range.

Q: Which substitute has the best inventory availability?

A: STPS2045CT has the highest inventory with 25,100 units in stock, followed by STPS40L45CT with 17,860 units. VS-MBR2045CT-M3 has 6,243 units. VS-20CTQ045HN3 has 781 units. MBR2040CT has 1,516 units.

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