VS-MBRB3045CTPBF Equivalent & Substitute Parts

Part Overview

The VS-MBRB3045CTPBF is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 45 V DC reverse voltage and 15 A average rectified current per diode in a Surface Mount TO-263-3 (D2PAK) package. The part is currently discontinued at DiGi Electronics, with 647 pieces available in new original stock. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

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)	15 A
Voltage - Forward (Vf) (Max) @ If	760 mV @ 30 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-MBRB3045CTPBF is determined by 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): 15 A (or higher)
Mounting Type: Surface Mount
Package / Case: TO-263-3, D2PAK (2 Leads + Tab)

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Variations permitted within design margin
Current - Reverse Leakage @ Vr: Variations permitted within design margin
Operating Temperature - Junction: Variations permitted if application requirements are met
Packaging Format: Tube, Tape & Reel (TR), or Cut Tape (CT) & Digi-Reel®

Substitute parts are grouped into three categories: Direct Manufacturer Equivalents (same manufacturer, identical electrical specifications), Parametric Equivalents (same manufacturer, identical core electrical specifications with packaging variations), and Manufacturer Recommended Alternatives (different manufacturers, equivalent electrical performance within specified parameters).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Max)	Package	Product Status	Inventory
VS-MBRB3045CTPBF	Vishay	45 V	15 A	760 mV @ 30 A	1 mA @ 45 V	150°C	TO-263AB	Discontinued	647 Pcs
VS-MBRB3045CT-M3	Vishay	45 V	15 A	760 mV @ 30 A	1 mA @ 45 V	150°C	TO-263AB	Active	1036 Pcs
VS-MBRB3045CTL-M3	Vishay	45 V	15 A	760 mV @ 30 A	1 mA @ 45 V	150°C	TO-263AB	Active	758 Pcs
VS-MBRB3045CTR-M3	Vishay	45 V	15 A	760 mV @ 30 A	1 mA @ 45 V	150°C	TO-263AB	Active	923 Pcs
DSSK28-0045BS-TRL	IXYS	45 V	15 A	480 mV @ 15 A	20 mA @ 45 V	150°C	TO-263AA	Active	987 Pcs
MBRB2545CTT4G	onsemi	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	175°C	TO-263AB	Active	53514 Pcs
STPS2545CGY-TR	STMicroelectronics	45 V	12.5 A	840 mV @ 25 A	125 µA @ 45 V	175°C	TO-263AB	Active	3100 Pcs
STPS3045CG-TR	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	200°C	TO-263AB	Active	2870 Pcs
STPS3045CGY-TR	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	200°C	TO-263AB	Active	19257 Pcs
STPS30L45CG-TR	STMicroelectronics	45 V	15 A	550 mV @ 15 A	400 µA @ 45 V	150°C	TO-263AB	Active	5200 Pcs

Engineering Selection Recommendations

Direct Manufacturer Equivalents (Vishay): VS-MBRB3045CT-M3, VS-MBRB3045CTL-M3, and VS-MBRB3045CTR-M3 are direct equivalents with identical electrical specifications to the discontinued VS-MBRB3045CTPBF. These parts differ only in packaging format (Tube, Tape & Reel, or Tape & Reel variants) and are all Active status products. All three maintain ROHS3 compliance and Unlimited MSL rating. These are the primary substitution options for direct replacement.

Manufacturer Recommended Alternatives: MBRB2545CTT4G (onsemi) and STPS3045CG-TR, STPS3045CGY-TR, STPS30L45CG-TR (STMicroelectronics) are manufacturer-recommended alternatives that meet the core electrical requirements of 45 V reverse voltage and 15 A average rectified current. All are Active status products with ROHS3 compliance. STPS3045CGY-TR includes AEC-Q101 automotive qualification. These alternatives provide higher inventory availability and extended operating temperature ranges in certain cases.

Current-Reduced Alternative: STPS2545CGY-TR (STMicroelectronics) is rated for 12.5 A average rectified current, which is below the 15 A specification of the main part. This part is suitable only for applications where the 12.5 A rating is acceptable and includes AEC-Q101 automotive qualification.

Selection Criteria:

For direct replacement without design review: Select VS-MBRB3045CT-M3, VS-MBRB3045CTL-M3, or VS-MBRB3045CTR-M3
For highest inventory availability: Select MBRB2545CTT4G (53514 pieces) or STPS3045CGY-TR (19257 pieces)
For automotive applications: Select STPS3045CGY-TR or STPS2545CGY-TR (both AEC-Q101 qualified)
For extended temperature operation: Select MBRB2545CTT4G (175°C max) or STPS3045CG-TR/STPS3045CGY-TR (200°C max)

Frequently Asked Questions (FAQ)

Q: Can VS-MBRB3045CT-M3 be used as a direct replacement for VS-MBRB3045CTPBF? A: Yes. VS-MBRB3045CT-M3 is a direct equivalent with identical electrical specifications, diode configuration, voltage rating, current rating, and package type. The only difference is the packaging format (Tube versus the original packaging). Both are ROHS3 compliant with Unlimited MSL.

Q: What is the difference between VS-MBRB3045CTL-M3 and VS-MBRB3045CTR-M3? A: Both parts are parametric equivalents with identical electrical specifications. The difference is in the packaging format designation (L and R variants indicate different tape configurations for automated assembly). Electrical performance is identical.

Q: Can STPS3045CG-TR replace VS-MBRB3045CTPBF in all applications? A: STPS3045CG-TR meets the core electrical requirements of 45 V reverse voltage and 15 A average rectified current. However, it has lower forward voltage (570 mV @ 15 A versus 760 mV @ 30 A) and higher reverse leakage (200 µA @ 45 V versus 1 mA @ 45 V). These differences are within typical design margins for Schottky diode applications but should be verified for specific circuit requirements.

Q: Why is STPS2545CGY-TR listed as an alternative if it has only 12.5 A rating? A: STPS2545CGY-TR is included as a manufacturer-recommended alternative for applications where the 12.5 A rating is sufficient. It provides AEC-Q101 automotive qualification and higher inventory availability. Use this part only if your application current requirements do not exceed 12.5 A per diode.

Q: Are all substitute parts available in the same TO-263-3 D2PAK package? A: Yes. All substitute parts listed use the TO-263-3 D2PAK package format with 2 Leads + Tab. DSSK28-0045BS-TRL uses TO-263AA variant, which is mechanically and electrically compatible with TO-263AB.

Q: What is the significance of the packaging format (Tube, Tape & Reel, Cut Tape)? A: Packaging format affects handling and assembly processes. Tube packaging is for manual handling and small-quantity applications. Tape & Reel (TR) and Cut Tape (CT) formats are for automated pick-and-place assembly. The electrical specifications remain identical regardless of packaging format.

Q: Which substitute part has the best availability? A: MBRB2545CTT4G has the highest inventory with 53514 pieces in stock. STPS3045CGY-TR is the second option with 19257 pieces. Both are Active status products suitable for high-volume production.

Q: Is the IXYS DSSK28-0045BS-TRL a suitable replacement? A: DSSK28-0045BS-TRL meets the 45 V and 15 A specifications but has significantly different electrical characteristics: lower forward voltage (480 mV @ 15 A) and higher reverse leakage (20 mA @ 45 V). This part is suitable only if these parameter differences are acceptable for your specific application.

Q: Do all substitute parts have ROHS3 compliance? A: Yes. All substitute parts listed are ROHS3 compliant and have Unlimited MSL rating, matching the compliance profile of the original VS-MBRB3045CTPBF.

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