STPS3045CG Equivalent & Substitute Parts

Part Overview

The STPS3045CG is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with 45 V reverse voltage rating and 15 A average rectified current per diode. The device is housed in a TO-263-3 D2PAK surface mount package with 2 leads plus tab. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

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	570 mV @ 15 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
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 STPS3045CG 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
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Variations within component design tolerances
Current - Reverse Leakage @ Vr: Variations within component design tolerances
Operating Temperature - Junction: Extended ranges acceptable
Product Status: Active parts preferred over obsolete

Substitute parts are grouped into two categories: direct equivalents with identical electrical specifications and similar parts with compatible electrical characteristics within the same voltage and current ratings.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Tj (Max)	Product Status	Package
STPS3045CG	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	200°C	Obsolete	TO-263-3, D2PAK
VBT3045CBP-E3/8W	Vishay General Semiconductor - Diodes Division	45 V	15 A	570 mV @ 15 A	2 mA @ 45 V	200°C	Active	TO-263-3, D2PAK
DSSK28-0045BS-TRL	IXYS	45 V	15 A	480 mV @ 15 A	20 mA @ 45 V	150°C	Active	TO-263-3, D2PAK
MBRB2545CTT4G	onsemi	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	175°C	Active	TO-263-3, D2PAK
SBRB2545CTG	onsemi	45 V	15 A	620 mV @ 15 A	200 µA @ 45 V	175°C	Obsolete	TO-263-3, D2PAK
VS-MBRB2545CTL-M3	Vishay General Semiconductor - Diodes Division	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	150°C	Active	TO-263-3, D2PAK
VBT3045C-E3/4W	Vishay General Semiconductor - Diodes Division	45 V	15 A	570 mV @ 15 A	2 mA @ 45 V	150°C	Active	TO-263-3, D2PAK
VBT3045C-M3/4W	Vishay General Semiconductor - Diodes Division	45 V	15 A	570 mV @ 15 A	2 mA @ 45 V	150°C	Active	TO-263-3, D2PAK
VBT3045CBP-E3/4W	Vishay General Semiconductor - Diodes Division	45 V	15 A	570 mV @ 15 A	2 mA @ 45 V	150°C	Active	TO-263-3, D2PAK
VBT3045CBP-M3/4W	Vishay General Semiconductor - Diodes Division	45 V	15 A	570 mV @ 15 A	2 mA @ 45 V	150°C	Active	TO-263-3, D2PAK
MBRB1545CTT4G	onsemi	45 V	7.5 A	570 mV @ 7.5 A	100 µA @ 45 V	175°C	Active	TO-263-3, D2PAK

Engineering Selection Recommendations

Primary Substitutes (Active Status, Identical Specifications):

The VBT3045CBP-E3/8W, VBT3045C-E3/4W, VBT3045C-M3/4W, VBT3045CBP-E3/4W, and VBT3045CBP-M3/4W from Vishay General Semiconductor - Diodes Division are direct parametric equivalents to the STPS3045CG. These parts maintain the 45 V reverse voltage, 15 A average rectified current, and 570 mV forward voltage specification. All are ROHS3 compliant and carry MSL 1 rating. These parts are currently in active production status, providing long-term availability.

Secondary Substitutes (Active Status, Compatible Specifications):

The MBRB2545CTT4G from onsemi and VS-MBRB2545CTL-M3 from Vishay are compatible alternatives with identical voltage and current ratings. These parts exhibit higher forward voltage (820 mV @ 30 A) compared to the STPS3045CG specification but maintain the same reverse voltage and current capacity. Both are ROHS3 compliant and in active production.

The DSSK28-0045BS-TRL from IXYS is compatible with lower forward voltage (480 mV @ 15 A) and identical current rating. This part is ROHS3 compliant and active.

Obsolete Status Parts:

The SBRB2545CTG from onsemi shares identical electrical specifications with the STPS3045CG but carries obsolete status. This part is not recommended for new designs despite electrical compatibility.

Current-Limited Alternative:

The MBRB1545CTT4G from onsemi is rated for 7.5 A average rectified current per diode, half the STPS3045CG rating. This part is suitable only for applications with reduced current requirements and is not a direct substitute for full 15 A operation.

Frequently Asked Questions (FAQ)

Q: Can VBT3045CBP-E3/8W directly replace STPS3045CG in existing designs?

A: Yes. The VBT3045CBP-E3/8W maintains identical voltage (45 V), current (15 A), and forward voltage (570 mV @ 15 A) specifications. Both use TO-263-3 D2PAK packaging. The primary difference is product status: VBT3045CBP-E3/8W is active while STPS3045CG is obsolete.

Q: What is the difference between VBT3045CBP-E3/8W and VBT3045CBP-E3/4W?

A: Both parts are electrically identical with 45 V reverse voltage, 15 A current, and 570 mV forward voltage. The designation suffix indicates packaging quantity: E3/8W denotes tape and reel packaging in 8-wide format, while E3/4W denotes tube packaging in 4-wide format. Electrical performance is identical.

Q: Why does MBRB2545CTT4G show 820 mV forward voltage at 30 A instead of 15 A?

A: Forward voltage specifications vary by manufacturer test conditions. The MBRB2545CTT4G specification is measured at 30 A, while STPS3045CG is measured at 15 A. Both parts are rated for 15 A average rectified current and 45 V reverse voltage. The higher forward voltage measurement reflects different test current levels and does not indicate incompatibility.

Q: Is SBRB2545CTG suitable for new designs?

A: No. Although SBRB2545CTG is electrically compatible with identical 45 V, 15 A, and 620 mV specifications, it carries obsolete product status. Active alternatives such as VBT3045CBP-E3/8W or MBRB2545CTT4G are recommended for new designs to ensure long-term supply availability.

Q: Can MBRB1545CTT4G replace STPS3045CG?

A: No. MBRB1545CTT4G is rated for 7.5 A average rectified current per diode, which is half the STPS3045CG rating of 15 A. This part is suitable only for applications with reduced current requirements and cannot support full 15 A operation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the STPS3045CG compliance status. All parts also carry MSL 1 (Unlimited) moisture sensitivity level rating.

Q: What is the difference between TO-263-3 and TO-263AB packaging designations?

A: Both designations refer to the same physical package: a 3-lead surface mount package with 2 leads plus tab (D2PAK). TO-263-3 and TO-263AB are equivalent package specifications used by different manufacturers. All substitute parts use this identical package format.

Q: Which substitute offers the lowest forward voltage?

A: The DSSK28-0045BS-TRL from IXYS offers 480 mV forward voltage at 15 A, the lowest among all listed substitutes. However, this part has a maximum junction temperature of 150°C compared to STPS3045CG at 200°C, which may affect thermal performance in high-temperature applications.

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