VS-MBRB4045CTTRLP Equivalent & Substitute Parts

Part Overview

The VS-MBRB4045CTTRLP is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 45V DC reverse voltage and 20A average rectified current per diode, housed in a TO-263-3 D2PAK surface mount package. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

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)	20A
Voltage - Forward (Vf) (Max) @ If	580 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 45 V
Operating Temperature - Junction	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the VS-MBRB4045CTTRLP is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io) (per Diode): 20A minimum
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Parameter Variations:

Voltage - Forward (Vf) (Max) @ If: May vary within acceptable operating margins
Current - Reverse Leakage @ Vr: May vary within acceptable operating margins
Operating Temperature - Junction: May extend beyond original range
Product Status: Active status preferred for long-term availability

Substitute parts are grouped into two categories: Direct Manufacturer Equivalents (identical base product with packaging variations) and Parametric Equivalents (alternative manufacturers meeting all mandatory electrical and mechanical specifications).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Tj (Operating)	Package	Product Status
VS-MBRB4045CTTRLP	Vishay	45 V	20A	580 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	TO-263-3 D2PAK	Discontinued
VS-MBRB4045CTL-M3	Vishay	45 V	20A	600 mV @ 20 A	1 mA @ 45 V	-65°C ~ 150°C	TO-263-3 D2PAK	Active
VBT4045C-E3/8W	Vishay	45 V	20A	580 mV @ 20 A	3 mA @ 45 V	-40°C ~ 150°C	TO-263-3 D2PAK	Active
VBT4045C-M3/8W	Vishay	45 V	20A	580 mV @ 20 A	3 mA @ 45 V	-40°C ~ 150°C	TO-263-3 D2PAK	Active
STPS40L45CG-TR	STMicroelectronics	45 V	20A	530 mV @ 20 A	600 µA @ 45 V	-40°C ~ 150°C	TO-263-3 D2PAK	Active
STPS40L45CGY-TR	STMicroelectronics	45 V	20A	530 mV @ 20 A	600 µA @ 45 V	-40°C ~ 150°C	TO-263-3 D2PAK	Active
STPS2545CGY-TR	STMicroelectronics	45 V	12.5A	840 mV @ 25 A	125 µA @ 45 V	-40°C ~ 175°C	TO-263-3 D2PAK	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

VS-MBRB4045CTL-M3 is the direct equivalent from Vishay, offering identical electrical specifications with the exception of forward voltage (600 mV vs. 580 mV at 20A), which remains within acceptable operating margins. This part is currently active with 9094 units in stock and carries AEC-Q101 automotive qualification, providing enhanced reliability for mission-critical applications.

Secondary Substitutes (Parametric Equivalents - Vishay TMBS® Series):

VBT4045C-E3/8W and VBT4045C-M3/8W are parametric equivalents from Vishay's TMBS® series. Both maintain the 45V/20A rating and 580 mV forward voltage specification. The operating temperature range is reduced to -40°C ~ 150°C (versus -65°C ~ 150°C), which is acceptable for most industrial and commercial applications. Reverse leakage increases to 3 mA at 45V, remaining within acceptable limits for Schottky diode applications.

Alternative Substitutes (STMicroelectronics):

STPS40L45CG-TR and STPS40L45CGY-TR from STMicroelectronics provide full electrical equivalence at 45V/20A with superior forward voltage characteristics (530 mV @ 20A). The CGY variant includes AEC-Q101 automotive qualification. Both parts are active with adequate inventory. Reverse leakage is 600 µA at 45V, which is lower than the original specification.

Limited Substitute (Current Derating):

STPS2545CGY-TR is a manufacturer-recommended substitute with reduced current rating (12.5A versus 20A per diode). This part is suitable only for applications where the 12.5A rating meets system requirements. It offers extended operating temperature range (-40°C ~ 175°C) and AEC-Q101 qualification.

Frequently Asked Questions (FAQ)

Q: Can VS-MBRB4045CTL-M3 directly replace VS-MBRB4045CTTRLP?

A: Yes. VS-MBRB4045CTL-M3 is the direct Vishay equivalent with identical diode configuration, voltage rating, and current rating. The forward voltage specification increases from 580 mV to 600 mV at 20A, which is within acceptable operating margins for Schottky diode applications and does not affect functional compatibility.

Q: What is the difference between VBT4045C-E3/8W and VBT4045C-M3/8W?

A: Both parts are electrically identical Vishay TMBS® series diodes with 45V/20A ratings and 580 mV forward voltage. The primary difference is packaging designation (E3 versus M3 tape and reel configurations). Selection depends on your procurement and assembly requirements.

Q: Are STMicroelectronics STPS40L45CG-TR and STPS40L45CGY-TR interchangeable?

A: Both parts are electrically identical with 45V/20A ratings and 530 mV forward voltage. The CGY variant includes AEC-Q101 automotive qualification, while the CG variant does not. Selection depends on application requirements and qualification standards.

Q: Why is STPS2545CGY-TR listed as a substitute if it has lower current rating?

A: STPS2545CGY-TR is listed as a manufacturer-recommended substitute for applications where 12.5A per diode meets system requirements. It is not a direct replacement for 20A applications but provides an alternative for reduced-current designs using the same package and voltage rating.

Q: What are the key differences in operating temperature ranges?

A: The original VS-MBRB4045CTTRLP operates from -65°C to 150°C. Vishay TMBS® equivalents (VBT4045C series) operate from -40°C to 150°C. STMicroelectronics parts operate from -40°C to 150°C (STPS40L45 series) or -40°C to 175°C (STPS2545CGY-TR). Selection depends on your application's temperature requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching the original part's environmental compliance profile.

Q: Which substitute offers the best forward voltage performance?

A: STMicroelectronics STPS40L45CG-TR and STPS40L45CGY-TR offer the lowest forward voltage at 530 mV @ 20A, compared to 580 mV for the original part and Vishay TMBS® equivalents. This results in lower power dissipation in high-current applications.

Q: Can I use these substitutes in automotive applications?

A: VS-MBRB4045CTL-M3, STPS40L45CGY-TR, and STPS2545CGY-TR carry AEC-Q101 automotive qualification. VBT4045C series and STPS40L45CG-TR do not carry automotive qualification. Selection depends on your application's automotive requirements.

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