SBG1045CT-F Equivalent & Substitute Parts

Part Overview

The SBG1045CT-F is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with a maximum reverse voltage of 45 V and average rectified current of 10 A per diode. The component is housed in a TO-263-3 D2PAK surface mount package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	SBG1045CT-F
Manufacturer	Diodes Incorporated
Category	Diodes, Rectifiers
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	550 mV @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 45 V
Operating Temperature - Junction	-65°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SBG1045CT-F is determined by the following critical parameters:

Primary Compatibility Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V minimum
Current - Average Rectified (Io) (per Diode): 10 A minimum
Mounting Type: Surface Mount
Package / Case: TO-263-3, D2PAK compatible

Secondary Compatibility Criteria:

Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1 - Direct Electrical Equivalents (45 V, 10 A rated): Parts that match the exact voltage and current specifications of the SBG1045CT-F, ensuring drop-in replacement capability without circuit redesign.

Category 2 - Enhanced Performance Substitutes (45 V, higher current rating): Parts that exceed the current rating of the SBG1045CT-F while maintaining the 45 V reverse voltage specification, providing improved thermal performance and design margin.

Category 3 - Voltage-Reduced Substitutes (30 V, higher current rating): Parts with reduced reverse voltage rating but enhanced current capability, suitable only for applications where the 45 V specification is not required.

Parameter Comparison

Parameter	SBG1045CT-F	VBT2045CBP-E3/4W	DSTB2045C	STPS2545CGY-TR	DSSK28-0045BS-TRL	STPS3030CG-TR
Manufacturer	Diodes Inc.	Vishay	Littelfuse	STMicroelectronics	IXYS	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active
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	30 V
Current - Average Rectified (Io) (per Diode)	10 A	10 A	10 A	12.5 A	15 A	15 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 5 A	580 mV @ 10 A	580 mV @ 10 A	840 mV @ 25 A	480 mV @ 15 A	490 mV @ 15 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA	Fast Recovery ≤ 500 ns, > 200 mA	Fast Recovery ≤ 500 ns, > 200 mA	Fast Recovery ≤ 500 ns, > 200 mA	Fast Recovery ≤ 500 ns, > 200 mA	Fast Recovery ≤ 500 ns, > 200 mA
Current - Reverse Leakage @ Vr	1 mA @ 45 V	2 mA @ 45 V	2 mA @ 45 V	125 µA @ 45 V	20 mA @ 45 V	1 mA @ 30 V
Operating Temperature - Junction	-65°C ~ 125°C	-40°C ~ 150°C	-55°C ~ 150°C	-40°C ~ 175°C	-55°C ~ 150°C	Max 150°C
Mounting Type	Surface Mount	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	TO-263-3, D2PAK
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Type	Bulk	Tube	Tape & Reel	Tape & Reel	Tape & Reel	Tape & Reel

Engineering Selection Recommendations

Direct Electrical Equivalents (Recommended for Drop-In Replacement):

The VBT2045CBP-E3/4W (Vishay) and DSTB2045C (Littelfuse) are direct electrical equivalents to the SBG1045CT-F, matching the 45 V reverse voltage and 10 A current specifications. Both parts are active products with ROHS3 compliance and MSL 1 rating. The DSTB2045C offers higher inventory availability (2321 pcs) and extended operating temperature range (-55°C ~ 150°C) compared to the VBT2045CBP-E3/4W (-40°C ~ 150°C). The VBT2045CBP-E3/4W is part of the TMBS® series and is supplied in tube packaging, while DSTB2045C is supplied in tape and reel format.

Enhanced Performance Substitutes (45 V Rating):

The STPS2545CGY-TR (STMicroelectronics) provides 12.5 A current rating with 45 V reverse voltage, offering improved thermal performance and design margin. This part includes AEC-Q101 automotive qualification and operates across an extended temperature range (-40°C ~ 175°C). The DSSK28-0045BS-TRL (IXYS) provides 15 A current rating at 45 V, delivering the highest current capacity in the 45 V category with improved forward voltage characteristics (480 mV @ 15 A).

Voltage-Reduced Substitute (30 V Rating):

The STPS3030CG-TR (STMicroelectronics) operates at 30 V reverse voltage with 15 A current rating. This part is suitable only for applications where the 45 V specification is not required. The reduced voltage rating is not compatible with circuits designed for 45 V operation.

Compliance and Availability:

All recommended substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating. All active substitutes are currently in stock with inventory levels ranging from 712 to 3100 pieces.

Frequently Asked Questions (FAQ)

Q: Can the VBT2045CBP-E3/4W directly replace the SBG1045CT-F?

A: Yes. The VBT2045CBP-E3/4W is a direct electrical equivalent with identical 45 V reverse voltage and 10 A current specifications. Both components use the same TO-263-3 D2PAK package and share identical diode configuration (1 pair common cathode). The primary difference is packaging format (tube versus bulk) and operating temperature range (-40°C ~ 150°C versus -65°C ~ 125°C).

Q: What is the difference between the DSTB2045C and DSSK28-0045BS-TRL?

A: Both parts maintain the 45 V reverse voltage specification required for SBG1045CT-F replacement. The DSTB2045C is rated for 10 A (matching the original part), while the DSSK28-0045BS-TRL is rated for 15 A, providing higher current capacity. The DSSK28-0045BS-TRL exhibits lower forward voltage (480 mV @ 15 A) compared to DSTB2045C (580 mV @ 10 A), resulting in reduced power dissipation in high-current applications.

Q: Is the STPS3030CG-TR compatible with the SBG1045CT-F?

A: The STPS3030CG-TR is not compatible as a direct replacement. This part operates at 30 V maximum reverse voltage, which is insufficient for circuits designed for the 45 V specification of the SBG1045CT-F. Use this part only in applications where the circuit voltage requirement does not exceed 30 V.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in three packaging formats: tube (VBT2045CBP-E3/4W), tape and reel (DSTB2045C, STPS2545CGY-TR, DSSK28-0045BS-TRL, STPS3030CG-TR). Tape and reel format is standard for automated assembly processes, while tube packaging is suitable for manual assembly or lower-volume applications.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All recommended substitute parts are ROHS3 compliant and carry MSL 1 (unlimited) moisture sensitivity rating, matching the compliance profile of the SBG1045CT-F.

Q: Which substitute part offers the best thermal performance?

A: The STPS2545CGY-TR provides the widest operating temperature range (-40°C ~ 175°C) and includes AEC-Q101 automotive qualification. The DSSK28-0045BS-TRL offers the lowest forward voltage at rated current (480 mV @ 15 A), resulting in reduced power dissipation and improved thermal performance in high-current applications.

Q: Are there inventory considerations for selecting a substitute?

A: Yes. Current inventory levels vary: STPS2545CGY-TR (3100 pcs), DSTB2045C (2321 pcs), DSSK28-0045BS-TRL (987 pcs), VBT2045CBP-E3/4W (712 pcs), STPS3030CG-TR (1594 pcs). For applications requiring immediate availability, STPS2545CGY-TR and DSTB2045C offer the highest stock levels.

Q: What is the significance of the "1 Pair Common Cathode" configuration?

A: This configuration indicates the diode array contains two diodes sharing a common cathode terminal. All substitute parts maintain this identical configuration, ensuring pin-compatible replacement without circuit modification.

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