STPS2545CG Equivalent & Substitute Parts

Part Overview

The STPS2545CG is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with a maximum reverse voltage of 45 V and average rectified current of 12.5 A per diode. The component is packaged in TO-263-3 (D2PAK) surface mount configuration with 2 leads plus tab. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity.

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)	12.5 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 12.5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	125 µA @ 45 V
Operating Temperature - Junction (Max)	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

Substitution of the STPS2545CG is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Mounting Type: Surface Mount
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Current Rating Consideration: Substitute parts must support the application's current requirements. The STPS2545CG operates at 12.5 A per diode. Substitute parts with equal or higher current ratings (10 A, 15 A) are electrically compatible within the same voltage and configuration class.

Electrical Performance Parameters: Forward voltage (Vf), reverse leakage current, and operating temperature range vary among substitutes but do not prevent functional equivalence when the above mandatory criteria are met.

Parameter Comparison

Parameter	STPS2545CG (Main)	MBRB2545CT	DSSK28-0045BS-TRL	DSTB2045C
Manufacturer	STMicroelectronics	Vishay General Semiconductor - Diodes Division	IXYS	Littelfuse Inc.
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V
Current - Average Rectified (Io) (per Diode)	12.5 A	15 A	15 A	10 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 12.5 A	820 mV @ 30 A	480 mV @ 15 A	580 mV @ 10 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)
Current - Reverse Leakage @ Vr	125 µA @ 45 V	200 µA @ 45 V	20 mA @ 45 V	2 mA @ 45 V
Operating Temperature - Junction	175°C (Max)	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Obsolete	Active	Active

Engineering Selection Recommendations

DSSK28-0045BS-TRL (IXYS)

This substitute is the primary recommendation for new designs and production continuity. The DSSK28-0045BS-TRL maintains active product status, ensuring long-term availability and supply chain stability. It is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The component supports 15 A per diode, exceeding the STPS2545CG requirement of 12.5 A, providing design margin. Electrical characteristics including fast recovery speed and 45 V reverse voltage rating are fully compatible. The TO-263-3 D2PAK package ensures direct mechanical and electrical compatibility with existing PCB layouts.

DSTB2045C (Littelfuse Inc.)

This substitute is suitable for applications where current rating of 10 A per diode is sufficient. The DSTB2045C is active product status with ROHS3 compliance and REACH unaffected status. Forward voltage characteristics at 10 A (580 mV) closely match the STPS2545CG specification. Reverse leakage current is significantly lower (2 mA @ 45 V) compared to the main part, indicating superior leakage performance. The TO-263-3 D2PAK package provides direct compatibility.

MBRB2545CT (Vishay General Semiconductor - Diodes Division)

This substitute is classified as obsolete product status, similar to the main part. While it provides 15 A per diode current rating and identical package configuration, it is RoHS non-compliant, which may restrict use in applications subject to RoHS regulations. This substitute is suitable only for legacy system maintenance where regulatory compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can DSSK28-0045BS-TRL directly replace STPS2545CG in existing designs?

A: Yes. Both components share identical diode configuration (1 pair common cathode), Schottky technology, 45 V reverse voltage rating, and TO-263-3 D2PAK package. The DSSK28-0045BS-TRL supports 15 A per diode, which exceeds the STPS2545CG requirement of 12.5 A. No PCB layout modifications are required.

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

A: Both are active products with ROHS3 compliance and identical package configuration. The primary difference is current rating: DSTB2045C supports 10 A per diode, while DSSK28-0045BS-TRL supports 15 A per diode. Selection depends on application current requirements. DSTB2045C exhibits lower reverse leakage current (2 mA @ 45 V versus 20 mA @ 45 V).

Q: Why is MBRB2545CT listed as a substitute if it is obsolete?

A: MBRB2545CT is included for reference in legacy system documentation and maintenance scenarios. However, it is RoHS non-compliant and obsolete, making it unsuitable for new designs or applications subject to RoHS regulations. DSSK28-0045BS-TRL or DSTB2045C are preferred alternatives.

Q: Are there package compatibility concerns when substituting these parts?

A: No. All listed substitutes use the TO-263-3 D2PAK package with 2 leads plus tab, identical to the STPS2545CG. Pin configuration and mechanical dimensions are compatible. Direct PCB substitution is possible without layout changes.

Q: What is the significance of the 45 V reverse voltage rating in substitution?

A: The 45 V reverse voltage rating is a mandatory compatibility criterion. All substitute parts maintain this specification, ensuring they operate within the same voltage class as the STPS2545CG. This parameter cannot be compromised during substitution.

Q: How does forward voltage (Vf) variation affect substitution suitability?

A: Forward voltage variation among substitutes (480 mV to 820 mV at different current levels) reflects manufacturing differences but does not prevent functional equivalence. Applications designed for the STPS2545CG forward voltage characteristic (570 mV @ 12.5 A) will operate with substitutes, though power dissipation and thermal performance may vary slightly. Circuit design margins should account for these variations.

Q: What is the importance of product status (Active vs. Obsolete) in component selection?

A: Active product status ensures long-term availability, supply chain continuity, and manufacturer support. Obsolete products face discontinuation risk and limited availability. For new designs, DSSK28-0045BS-TRL (active) is preferred over MBRB2545CT (obsolete) to ensure production sustainability.

Q: Are all substitutes RoHS compliant?

A: No. DSSK28-0045BS-TRL and DSTB2045C are ROHS3 compliant. MBRB2545CT is RoHS non-compliant. For applications subject to RoHS regulations, only DSSK28-0045BS-TRL or DSTB2045C are acceptable.

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