Equivalent & Substitute Parts for 25CTQ045S Schottky Diode Array

Part Overview

The 25CTQ045S is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as 1 pair common cathode with 45V reverse voltage rating and 15A average rectified current per diode. The device is packaged in TO-263-3 (D2PAK) surface mount format with fast recovery characteristics suitable for switching applications.

The 25CTQ045S has reached obsolete product status. Equivalent and substitute parts are required for new designs, production continuity, and component sourcing. The following alternatives maintain electrical and mechanical compatibility within specified parameter tolerances.

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	15	A
Voltage - Forward (Vf) Max @ If	560	mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	1.75	mA @ 45 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the 25CTQ045S is determined by the following mandatory parameters:

Electrical Compatibility Criteria:

Diode Configuration: 1 Pair Common Cathode (required)
Technology: Schottky (required)
Voltage - DC Reverse (Vr) Max: 45V minimum (equal or higher acceptable)
Current - Average Rectified (Io) per Diode: 15A minimum (equal or higher acceptable)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (required)

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount (required)
Package / Case: TO-263-3, D2PAK format (required)
Moisture Sensitivity Level (MSL): 1 (Unlimited) (required)

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalents (Vishay): Parts VS-25CTQ045STRL-M3 and VS-25CTQ045STRR-M3 are direct parametric equivalents with identical electrical specifications and active product status. These differ from the main part only in packaging format (Tape & Reel) and RoHS compliance status.

Category 2 - Manufacturer Recommended Alternatives: Parts from IXYS, onsemi, Rohm Semiconductor, and STMicroelectronics meet the core electrical and mechanical requirements with variations in forward voltage, reverse leakage current, and operating temperature ranges. These alternatives are all active products with RoHS3 compliance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (per Diode) A	Vf (Max) mV	Ir @ Vr µA/mA	Tj (Max) °C	Product Status	RoHS Status
25CTQ045S	Vishay	45	15	560 @ 15A	1.75 mA @ 45V	150	Obsolete	Non-compliant
VS-25CTQ045STRL-M3	Vishay	45	15	560 @ 15A	1.75 mA @ 45V	150	Active	ROHS3
VS-25CTQ045STRR-M3	Vishay	45	15	560 @ 15A	1.75 mA @ 45V	150	Active	ROHS3
DSSK28-0045BS-TRL	IXYS	45	15	480 @ 15A	20 mA @ 45V	150	Active	ROHS3
MBRB2545CTT4G	onsemi	45	15	820 @ 30A	200 µA @ 45V	175	Active	ROHS3
RB225NS-40TL	Rohm	40	15	550 @ 15A	500 µA @ 40V	150	Active	ROHS3
RBQ30NS45ATL	Rohm	45	15	650 @ 15A	200 µA @ 45V	150	Active	ROHS3
STPS2545CGY-TR	STMicroelectronics	45	12.5	840 @ 25A	125 µA @ 45V	175	Active	ROHS3
STPS3045CG-TR	STMicroelectronics	45	15	570 @ 15A	200 µA @ 45V	200	Active	ROHS3
STPS30L45CG-TR	STMicroelectronics	45	15	550 @ 15A	400 µA @ 45V	150	Active	ROHS3

Engineering Selection Recommendations

Direct Replacement (Preferred):

VS-25CTQ045STRL-M3 and VS-25CTQ045STRR-M3 are the primary alternatives. Both are manufactured by Vishay and provide identical electrical performance to the 25CTQ045S. The distinction between these two parts is packaging format: STRL-M3 is supplied in Cut Tape format, while STRR-M3 is supplied in Tape & Reel format. Both parts are active products with ROHS3 compliance, addressing the obsolescence of the original part.

Alternative Manufacturers:

STPS3045CG-TR (STMicroelectronics) and STPS30L45CG-TR (STMicroelectronics) are suitable alternatives meeting all core electrical and mechanical requirements. STPS3045CG-TR offers the highest maximum junction temperature (200°C) among available options. STPS30L45CG-TR provides forward voltage characteristics closest to the original specification (550 mV @ 15A).

DSSK28-0045BS-TRL (IXYS) meets electrical requirements with lower forward voltage (480 mV @ 15A) but exhibits higher reverse leakage current (20 mA @ 45V) compared to the original specification.

RBQ30NS45ATL (Rohm Semiconductor) maintains 45V reverse voltage rating and 15A current rating with active product status and ROHS3 compliance.

Current Rating Consideration:

STPS2545CGY-TR (STMicroelectronics) has a reduced average rectified current rating of 12.5A per diode. This part is suitable only for applications where the 15A rating is not required.

Voltage Rating Consideration:

RB225NS-40TL (Rohm Semiconductor) has a reduced reverse voltage rating of 40V. This part is suitable only for applications where 45V reverse voltage rating is not required.

Frequently Asked Questions (FAQ)

Q: Can VS-25CTQ045STRL-M3 or VS-25CTQ045STRR-M3 be used as direct replacements for 25CTQ045S?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (45V, 15A, 560 mV forward voltage, 1.75 mA reverse leakage). The primary differences are packaging format (Cut Tape vs. Tape & Reel) and RoHS3 compliance status. No circuit modifications are required.

Q: What is the difference between STRL-M3 and STRR-M3 packaging?

A: STRL-M3 is supplied in Cut Tape (CT) format suitable for manual or semi-automated assembly. STRR-M3 is supplied in Tape & Reel (TR) format optimized for automated pick-and-place assembly. Electrical performance is identical.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed (VS-25CTQ045STRL-M3, VS-25CTQ045STRR-M3, DSSK28-0045BS-TRL, MBRB2545CTT4G, RB225NS-40TL, RBQ30NS45ATL, STPS2545CGY-TR, STPS3045CG-TR, STPS30L45CG-TR) are ROHS3 compliant. The original 25CTQ045S is RoHS non-compliant.

Q: Can STPS2545CGY-TR be used in place of 25CTQ045S?

A: STPS2545CGY-TR has a reduced average rectified current rating of 12.5A per diode compared to the 15A requirement of 25CTQ045S. This part is suitable only for applications where the maximum current requirement does not exceed 12.5A per diode.

Q: Can RB225NS-40TL be used in place of 25CTQ045S?

A: RB225NS-40TL has a reduced reverse voltage rating of 40V compared to the 45V rating of 25CTQ045S. This part is suitable only for applications where the maximum reverse voltage does not exceed 40V.

Q: What are the key differences between STPS3045CG-TR and STPS30L45CG-TR?

A: Both parts meet the 45V, 15A core requirements. STPS3045CG-TR has a maximum junction temperature of 200°C and forward voltage of 570 mV @ 15A. STPS30L45CG-TR has a maximum junction temperature of 150°C and forward voltage of 550 mV @ 15A. STPS30L45CG-TR forward voltage is closer to the original 25CTQ045S specification.

Q: Are all substitute parts in the same TO-263-3 D2PAK package?

A: Yes. All substitute parts use TO-263-3 (D2PAK) surface mount packaging with 2 leads plus tab configuration. PCB layout and thermal management considerations remain unchanged.

Q: What is the moisture sensitivity level for all substitute parts?

A: All substitute parts have Moisture Sensitivity Level (MSL) of 1 (Unlimited), matching the original 25CTQ045S specification. No special moisture control measures are required during storage or handling.

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