VS-40CTQ045SPBF Schottky Diode Array Equivalent & Substitute Parts

Part Overview

The VS-40CTQ045SPBF is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as 1 pair common cathode with 45V reverse voltage rating and 20A average rectified current per diode. The device is packaged in TO-263-3 (D2PAK) surface mount configuration.

The VS-40CTQ045SPBF is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from Vishay and alternative manufacturers including STMicroelectronics and IXYS, offering direct replacements or parametric alternatives with comparable electrical and mechanical characteristics.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io) (per Diode)	20	A
Voltage - Forward (Vf) (Max) @ If	530 mV @ 20 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	3	mA @ 45 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the VS-40CTQ045SPBF are classified into three categories based on electrical parameter compatibility and product status:

Direct Manufacturer Equivalents (Vishay): Parts sharing identical electrical specifications, diode configuration, and package type. These parts differ only in packaging format (tube versus tape & reel) and maintain active product status.

Parametric Equivalents (STMicroelectronics): Parts with matching 45V reverse voltage rating, 20A current rating, and TO-263-3 D2PAK package. These parts maintain identical forward voltage characteristics and fast recovery speed specifications.

Parametric Alternatives (Lower Current Rating): Parts with 45V reverse voltage rating but reduced current ratings (12.5A to 15A). These parts are suitable for applications where the full 20A capability is not required.

Substitution eligibility is determined by the following key parameters:

Voltage - DC Reverse (Vr) (Max): 45V (mandatory match)
Diode Configuration: 1 Pair Common Cathode (mandatory match)
Package / Case: TO-263-3, D2PAK (mandatory match for mechanical compatibility)
Current - Average Rectified (Io): 20A (for direct equivalents) or ≥ application requirement (for alternatives)
Technology: Schottky (mandatory match)

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [A]	Vf (Max) [mV]	Ir @ Vr [mA/µA]	Tj (Max) [°C]	Package	Status	Packaging Format
VS-40CTQ045SPBF	Vishay	45	20	530 @ 20A	3 mA	150	TO-263-3 D2PAK	Discontinued	Tube
VS-40CTQ045S-M3	Vishay	45	20	530 @ 20A	3 mA	150	TO-263-3 D2PAK	Active	Tube
VS-40CTQ045STRL-M3	Vishay	45	20	530 @ 20A	3 mA	150	TO-263-3 D2PAK	Active	Tape & Reel
VS-40CTQ045STRR-M3	Vishay	45	20	530 @ 20A	3 mA	150	TO-263-3 D2PAK	Active	Tape & Reel
STPS40L45CG-TR	STMicroelectronics	45	20	530 @ 20A	600 µA	150	TO-263-3 D2PAK	Active	Cut Tape & Digi-Reel
STPS40L45CGY-TR	STMicroelectronics	45	20	530 @ 20A	600 µA	150	TO-263-3 D2PAK	Active	Tape & Reel
STPS41L45CG-TR	STMicroelectronics	45	20	530 @ 20A	1.2 mA	150	TO-263-3 D2PAK	Active	Cut Tape & Digi-Reel
STPS2545CG-TR	STMicroelectronics	45	12.5	570 @ 12.5A	125 µA	175	TO-263-3 D2PAK	Active	Tape & Reel
STPS2545CGY-TR	STMicroelectronics	45	12.5	840 @ 25A	125 µA	175	TO-263-3 D2PAK	Active	Tape & Reel
DSSK28-0045BS-TRL	IXYS	45	15	480 @ 15A	20 mA	150	TO-263-3 D2PAK	Active	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

Select VS-40CTQ045S-M3, VS-40CTQ045STRL-M3, or VS-40CTQ045STRR-M3 from Vishay. These parts maintain identical electrical specifications to the discontinued VS-40CTQ045SPBF, including 20A current rating, 530 mV forward voltage at 20A, and 3 mA reverse leakage current. All three are active products with ROHS3 compliance and MSL 1 rating. Choose packaging format based on assembly requirements: tube for manual handling or tape & reel for automated placement.

For STMicroelectronics Alternatives (20A Rating):

STPS40L45CG-TR, STPS40L45CGY-TR, and STPS41L45CG-TR provide 20A current capability with 45V reverse voltage rating in TO-263-3 D2PAK package. STPS40L45CGY-TR includes automotive qualification (AEC-Q101) and extended temperature range (-40°C to 150°C). STPS41L45CG-TR exhibits lower reverse leakage current (1.2 mA versus 3 mA). All three are active products with ROHS3 compliance.

For Reduced Current Applications (12.5A Rating):

STPS2545CG-TR and STPS2545CGY-TR are suitable for applications not requiring full 20A capability. STPS2545CGY-TR includes automotive qualification (AEC-Q101) and supports higher maximum junction temperature (175°C). Both maintain 45V reverse voltage rating and TO-263-3 D2PAK package compatibility.

For 15A Applications:

DSSK28-0045BS-TRL from IXYS provides 15A current rating with 45V reverse voltage in TO-263-3 D2PAK package. This part is suitable for intermediate current requirements between 12.5A and 20A.

All recommended substitutes are active products with ROHS3 compliance, MSL 1 rating, and REACH unaffected status, matching the compliance profile of the original part.

Frequently Asked Questions (FAQ)

Q: Can STPS2545CG-TR or STPS2545CGY-TR be used as direct replacements for VS-40CTQ045SPBF?

A: STPS2545CG-TR and STPS2545CGY-TR are parametric alternatives, not direct replacements. Both parts maintain the 45V reverse voltage rating and TO-263-3 D2PAK package, but feature reduced current rating (12.5A versus 20A). These parts are suitable only for applications where the circuit current requirement does not exceed 12.5A per diode.

Q: What is the difference between VS-40CTQ045STRL-M3 and VS-40CTQ045STRR-M3?

A: Both parts are electrically identical with matching 20A current rating, 45V reverse voltage, and 530 mV forward voltage specifications. The difference is in packaging format: STRL-M3 is supplied in tape & reel format with left-hand reel orientation, while STRR-M3 is supplied in tape & reel format with right-hand reel orientation. Selection depends on equipment feeder compatibility.

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

A: Both parts share identical electrical specifications (20A, 45V, 530 mV forward voltage) and TO-263-3 D2PAK package. STPS40L45CGY-TR includes automotive qualification (AEC-Q101) and extended operating temperature range (-40°C to 150°C), while STPS40L45CG-TR is rated to 150°C maximum junction temperature. Selection depends on application temperature requirements and automotive qualification necessity.

Q: What is the significance of reverse leakage current differences between substitute parts?

A: Reverse leakage current (Ir) varies among substitutes: VS-40CTQ045SPBF and Vishay equivalents specify 3 mA, STMicroelectronics STPS40L45CG-TR and STPS40L45CGY-TR specify 600 µA, STPS41L45CG-TR specifies 1.2 mA, and STPS2545 series specifies 125 µA. Lower leakage current reduces standby power dissipation and heat generation. Selection should consider circuit standby power budget and thermal management requirements.

Q: Can DSSK28-0045BS-TRL from IXYS be used in place of VS-40CTQ045SPBF?

A: DSSK28-0045BS-TRL is a parametric alternative suitable for applications where 15A current per diode is sufficient. It maintains 45V reverse voltage rating and TO-263-3 D2PAK package compatibility. The part is not a direct replacement due to reduced current rating (15A versus 20A). Verify circuit current requirements before selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed—including Vishay VS-40CTQ045S-M3, VS-40CTQ045STRL-M3, VS-40CTQ045STRR-M3, and all STMicroelectronics and IXYS alternatives—are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating and REACH unaffected status, matching the compliance profile of the original VS-40CTQ045SPBF.

Q: What packaging formats are available for the Vishay equivalents?

A: Vishay offers three active equivalents in different packaging formats: VS-40CTQ045S-M3 in tube packaging, VS-40CTQ045STRL-M3 in tape & reel (left-hand reel), and VS-40CTQ045STRR-M3 in tape & reel (right-hand reel). All three maintain identical electrical specifications and are suitable for different assembly processes.

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