STPS2045CG Equivalent & Substitute Parts

Part Overview

The STPS2045CG is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with 45 V reverse voltage rating and 10 A average rectified current per diode. The device 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 procurement needs.

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)	10 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 10 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	100 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 STPS2045CG is determined by the following critical parameters:

Primary Substitution Criteria:

Diode configuration: 1 pair common cathode
Technology: Schottky
Voltage rating: 45 V DC reverse (Vr)
Current rating: 10 A average rectified (Io) per diode or higher
Package: TO-263-3, D2PAK surface mount
Fast recovery speed: ≤ 500 ns

Substitution Categories:

Direct Equivalent: Parts with identical electrical specifications (45 V, 10 A, 570 mV forward voltage) and matching package configuration.

Similar Equivalent: Parts with identical voltage and package but higher current ratings (15 A, 20 A) that operate within the same thermal and electrical envelope.

Parametric Equivalent: Parts with identical electrical specifications and package but different product status or compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Max)	Package	Product Status	RoHS Status
STPS2045CG	STMicroelectronics	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	175°C	TO-263-3, D2PAK	Obsolete	ROHS3 Compliant
MBRB2045CT	Vishay General Semiconductor - Diodes Division	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	150°C	TO-263-3, D2PAK	Obsolete	RoHS non-compliant
20CTQ045S	SMC Diode Solutions	45 V	20 A	800 mV @ 20 A	1 mA @ 45 V	150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
DSSK28-0045BS-TRL	IXYS	45 V	15 A	480 mV @ 15 A	20 mA @ 45 V	150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
DSTB2045C	Littelfuse Inc.	45 V	10 A	580 mV @ 10 A	2 mA @ 45 V	150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
VS-MBRB2045CTL-M3	Vishay General Semiconductor - Diodes Division	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant
VS-MBRB2045CTR-M3	Vishay General Semiconductor - Diodes Division	45 V	10 A	570 mV @ 10 A	100 µA @ 45 V	150°C	TO-263-3, D2PAK	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Selection:

VS-MBRB2045CTL-M3 and VS-MBRB2045CTR-M3 are the preferred direct equivalents. Both parts maintain identical electrical specifications (45 V, 10 A, 570 mV forward voltage, 100 µA reverse leakage) and package configuration. These parts are currently active in production status and ROHS3 compliant, addressing the obsolescence of the original STPS2045CG. The difference between CTL-M3 and CTR-M3 variants relates to tape reel orientation; both are functionally equivalent.

Alternative Direct Equivalent:

DSTB2045C (Littelfuse Inc.) provides direct electrical equivalence at 45 V and 10 A ratings with identical package configuration. This part is active in production and ROHS3 compliant. Forward voltage specification is 580 mV at 10 A, within acceptable tolerance of the original 570 mV specification.

Higher Current Alternatives:

For applications where current margin is required, DSSK28-0045BS-TRL (IXYS, 15 A) and 20CTQ045S (SMC Diode Solutions, 20 A) provide increased current capacity while maintaining 45 V voltage rating and TO-263-3 package compatibility. Both parts are active in production and ROHS3 compliant. These selections are appropriate only when circuit design permits the higher current rating without thermal or performance degradation.

Compliance Considerations:

MBRB2045CT (Vishay) is electrically equivalent but is RoHS non-compliant and obsolete. This part should not be selected for new designs or applications requiring RoHS compliance.

Frequently Asked Questions (FAQ)

Q: Can VS-MBRB2045CTL-M3 or VS-MBRB2045CTR-M3 be used as direct replacements for STPS2045CG?

A: Yes. Both parts are parametric equivalents with identical voltage (45 V), current (10 A), forward voltage (570 mV @ 10 A), and reverse leakage (100 µA @ 45 V) specifications. Package configuration is identical (TO-263-3, D2PAK). Both are ROHS3 compliant and active in production, addressing the obsolescence status of the original part.

Q: What is the difference between VS-MBRB2045CTL-M3 and VS-MBRB2045CTR-M3?

A: Both parts are electrically and mechanically identical. The designations CTL-M3 and CTR-M3 indicate different tape reel orientations (left and right feed directions). Selection between these variants depends on assembly equipment compatibility, not electrical performance.

Q: Can DSTB2045C be used instead of STPS2045CG?

A: Yes. DSTB2045C maintains the same voltage (45 V), current (10 A), and package (TO-263-3, D2PAK) specifications. Forward voltage is specified at 580 mV at 10 A, compared to 570 mV for the original part, representing a 10 mV difference within acceptable engineering tolerance. DSTB2045C is active in production and ROHS3 compliant.

Q: When should DSSK28-0045BS-TRL (15 A) or 20CTQ045S (20 A) be selected?

A: These higher current alternatives are appropriate only when circuit design analysis confirms that the increased current rating provides necessary margin without introducing thermal or performance issues. The 45 V voltage rating and TO-263-3 package remain compatible. Both parts are active in production and ROHS3 compliant. Forward voltage specifications differ (480 mV @ 15 A for DSSK28-0045BS-TRL; 800 mV @ 20 A for 20CTQ045S) and must be evaluated against circuit requirements.

Q: Is MBRB2045CT a suitable substitute?

A: MBRB2045CT is electrically equivalent but is classified as obsolete and RoHS non-compliant. This part should not be selected for new designs or applications requiring regulatory compliance. Active, compliant alternatives are available.

Q: What package compatibility exists across all substitute parts?

A: All substitute parts listed use TO-263-3 (D2PAK) surface mount package with 2 leads plus tab configuration. PCB footprint and assembly process compatibility are maintained across all substitutes.

Q: How do reverse leakage specifications vary among substitutes?

A: Reverse leakage at 45 V ranges from 100 µA (STPS2045CG, VS-MBRB2045CTL-M3, VS-MBRB2045CTR-M3) to 2 mA (DSTB2045C), 20 mA (DSSK28-0045BS-TRL), and 1 mA (20CTQ045S). Lower leakage values indicate better performance in high-impedance applications. Circuit design requirements determine acceptable leakage specifications.

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