VS-12CTQ045SPBF Equivalent & Substitute Parts

Part Overview

The VS-12CTQ045SPBF is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration with a maximum reverse voltage of 45 V and average rectified current of 6 A per diode. The device is housed in a TO-263-3 D2PAK surface mount package with 2 leads plus tab.

The VS-12CTQ045SPBF is discontinued at DiGi Electronics. Equivalent and substitute parts are available from Vishay and alternative manufacturers 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)	6 A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 6 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	800 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 175°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

Substitute parts for the VS-12CTQ045SPBF are classified into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalents (Packaging Variants): Parts that maintain identical electrical specifications and package form factor but differ only in packaging format (tube, cut tape, or tape & reel). These parts are fully interchangeable at the component level.

Manufacturer Recommended Equivalent (Higher Current Rating): Parts that share the same reverse voltage rating, package type, and diode configuration but feature enhanced current handling capability. These parts are suitable for applications requiring higher current capacity while maintaining the same voltage class and physical footprint.

The following parameters determine substitution eligibility:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Package / Case: TO-263-3, D2PAK
Mounting Type: Surface Mount
Operating Temperature Range: -55°C ~ 175°C minimum

Parameter Comparison

Parameter	VS-12CTQ045SPBF	VS-12CTQ045S-M3	VS-12CTQ045STRL-M3	VS-12CTQ045STRR-M3	STPS2545CGY-TR
Manufacturer	Vishay	Vishay	Vishay	Vishay	STMicroelectronics
Diode Configuration	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
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V	45 V
Current - Average Rectified (Io) (per Diode)	6 A	6 A	6 A	6 A	12.5 A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 6 A	600 mV @ 6 A	600 mV @ 6 A	600 mV @ 6 A	840 mV @ 25 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)
Current - Reverse Leakage @ Vr	800 µA @ 45 V	800 µA @ 45 V	800 µA @ 45 V	800 µA @ 45 V	125 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-40°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

VS-12CTQ045S-M3: This Vishay part is a direct electrical equivalent to the VS-12CTQ045SPBF, differing only in packaging format (tube versus bulk). The part is currently active and maintains full compliance with ROHS3 and REACH requirements. This part is suitable for direct substitution in applications where the original tube packaging is not a constraint.

VS-12CTQ045STRL-M3: This Vishay part is a direct electrical equivalent supplied in cut tape and digi-reel format. The part is currently active with ROHS3 and REACH compliance. This packaging format is suitable for automated assembly processes requiring tape and reel delivery.

VS-12CTQ045STRR-M3: This Vishay part is a direct electrical equivalent supplied in tape and reel format. The part is currently active with ROHS3 and REACH compliance. This packaging format is standard for high-volume production environments.

STPS2545CGY-TR: This STMicroelectronics part shares the same 45 V reverse voltage rating, package type, and diode configuration as the VS-12CTQ045SPBF. The STPS2545CGY-TR features a higher average rectified current rating of 12.5 A per diode compared to 6 A for the original part. The part is currently active, ROHS3 compliant, and carries AEC-Q101 automotive qualification. The operating temperature range is -40°C to 175°C, which is narrower at the lower end compared to the original part's -55°C to 175°C range. This part is suitable for applications requiring higher current capacity within the same voltage class and package footprint.

Frequently Asked Questions (FAQ)

Q: Can VS-12CTQ045S-M3 be used as a direct replacement for VS-12CTQ045SPBF?

A: Yes. The VS-12CTQ045S-M3 is electrically identical to the VS-12CTQ045SPBF. Both parts feature the same 45 V reverse voltage, 6 A average rectified current per diode, 600 mV forward voltage at 6 A, and identical package type (TO-263-3 D2PAK). The difference is packaging format only (tube versus bulk). Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between VS-12CTQ045STRL-M3 and VS-12CTQ045STRR-M3?

A: Both parts are electrically identical to the VS-12CTQ045SPBF with identical electrical specifications. The difference is in packaging delivery format. VS-12CTQ045STRL-M3 is supplied in cut tape and digi-reel format, while VS-12CTQ045STRR-M3 is supplied in standard tape and reel format. Both are suitable for automated assembly processes.

Q: Can STPS2545CGY-TR replace VS-12CTQ045SPBF in all applications?

A: The STPS2545CGY-TR shares the same 45 V reverse voltage rating, package type (TO-263-3 D2PAK), and diode configuration (1 Pair Common Cathode) as the VS-12CTQ045SPBF. However, the STPS2545CGY-TR has a higher current rating of 12.5 A per diode compared to 6 A for the original part. The operating temperature range differs: STPS2545CGY-TR operates from -40°C to 175°C, while VS-12CTQ045SPBF operates from -55°C to 175°C. Applications requiring operation below -40°C require the original part or equivalent Vishay variants.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (VS-12CTQ045S-M3, VS-12CTQ045STRL-M3, VS-12CTQ045STRR-M3, and STPS2545CGY-TR) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the significance of the D2PAK package designation?

A: D2PAK is the industry standard designation for the TO-263-3 package used by all parts in this substitution list. This package includes 2 leads plus a tab for thermal management. All substitute parts maintain identical package footprint and pinout compatibility with the VS-12CTQ045SPBF.

Q: Why does STPS2545CGY-TR have different forward voltage specifications?

A: The STPS2545CGY-TR forward voltage is specified at 840 mV @ 25 A, while the VS-12CTQ045SPBF is specified at 600 mV @ 6 A. These measurements are taken at different current levels. The STPS2545CGY-TR's higher current rating results in different measurement conditions. Forward voltage characteristics vary with current and temperature in Schottky diodes.

Q: Are Vishay parts VS-12CTQ045S-M3, VS-12CTQ045STRL-M3, and VS-12CTQ045STRR-M3 interchangeable?

A: Yes. These three Vishay parts are electrically and mechanically identical. They differ only in packaging and delivery format (tube, cut tape/digi-reel, and tape & reel respectively). Selection between these variants depends on assembly process requirements and inventory management preferences.

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