30CTQ045STRL Equivalent & Substitute Parts

Part Overview

The 30CTQ045STRL is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration with a maximum reverse voltage of 45 V and average rectified current of 15 A per diode. The device is housed in a TO-263-3 D2PAK surface mount package with 2 leads plus tab.

The 30CTQ045STRL is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

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	620 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction	-55°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the 30CTQ045STRL is determined by the following critical parameters:

Electrical Parameters:

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

Mechanical Parameters:

Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type: Surface Mount

Substitute parts are grouped into three categories:

Parametric Equivalents: Parts that match all electrical and mechanical parameters with identical or superior performance characteristics. These include MBRB30H45CTHE3_B/I, VS-30CTQ045S-M3, VS-30CTQ045SHM3, and 30CTQ045S from Diotec Semiconductor.

Manufacturer Recommended Alternatives: Parts that meet the core electrical requirements (45 V, 15 A, Schottky, Common Cathode) with variations in forward voltage, reverse leakage current, or temperature ratings. These include DSSK28-0045BS-TRL (IXYS), MBRB2545CTT4G (onsemi), STPS2545CG-TR (STMicroelectronics), STPS3045CG-TR (STMicroelectronics), STPS3045CGY-TR (STMicroelectronics), and STPS30L45CG-TR (STMicroelectronics).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Tj (Operating)	Package	Product Status	RoHS Status
30CTQ045STRL	Vishay	45 V	15 A	620 mV @ 15 A	2 mA @ 45 V	-55°C ~ 175°C	TO-263AB	Obsolete	RoHS non-compliant
MBRB30H45CTHE3_B/I	Vishay	45 V	15 A	620 mV @ 15 A	80 µA @ 45 V	-65°C ~ 175°C	TO-263AB	Last Time Buy	ROHS3 Compliant
VS-30CTQ045S-M3	Vishay	45 V	15 A	620 mV @ 15 A	2 mA @ 45 V	-55°C ~ 175°C	TO-263AB	Active	Not specified
VS-30CTQ045SHM3	Vishay	45 V	15 A	620 mV @ 15 A	2 mA @ 45 V	-55°C ~ 175°C	TO-263AB	Active	ROHS3 Compliant
DSSK28-0045BS-TRL	IXYS	45 V	15 A	480 mV @ 15 A	20 mA @ 45 V	-55°C ~ 150°C	TO-263AB	Active	ROHS3 Compliant
MBRB2545CTT4G	onsemi	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	-65°C ~ 175°C	TO-263AB	Active	ROHS3 Compliant
STPS2545CG-TR	STMicroelectronics	45 V	12.5 A	570 mV @ 12.5 A	125 µA @ 45 V	-55°C ~ 175°C	TO-263AB	Active	ROHS3 Compliant
STPS3045CG-TR	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	-55°C ~ 200°C	TO-263AB	Active	ROHS3 Compliant
STPS3045CGY-TR	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	-55°C ~ 200°C	TO-263AB	Active	ROHS3 Compliant
STPS30L45CG-TR	STMicroelectronics	45 V	15 A	550 mV @ 15 A	400 µA @ 45 V	-55°C ~ 150°C	TO-263AB	Active	ROHS3 Compliant
30CTQ045S	Diotec Semiconductor	45 V	15 A	620 mV @ 15 A	50 µA @ 45 V	-50°C ~ 175°C	TO-263AB	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Obsolete Part Replacement):

VS-30CTQ045SHM3 and VS-30CTQ045S-M3 from Vishay are direct parametric equivalents to the 30CTQ045STRL. Both maintain identical electrical specifications (45 V, 15 A, 620 mV forward voltage at 15 A, 2 mA reverse leakage). VS-30CTQ045SHM3 is ROHS3 compliant and carries AEC-Q101 automotive qualification, making it suitable for applications requiring regulatory compliance. VS-30CTQ045S-M3 is active and available in tube packaging.

30CTQ045S from Diotec Semiconductor is a parametric equivalent with identical core electrical parameters and ROHS3 compliance. This part is currently active with 1340 units in stock.

MBRB30H45CTHE3_B/I from Vishay is a parametric equivalent with extended temperature range (-65°C to 175°C) and ROHS3 compliance. This part carries AEC-Q101 automotive qualification and is classified as Last Time Buy.

Alternative Selections (When Direct Equivalents Are Unavailable):

STPS3045CG-TR and STPS3045CGY-TR from STMicroelectronics meet the core electrical requirements (45 V, 15 A) with lower forward voltage (570 mV @ 15 A) and extended maximum junction temperature (200°C). STPS3045CGY-TR includes AEC-Q101 automotive qualification. Both are ROHS3 compliant and currently active.

MBRB2545CTT4G from onsemi meets the 45 V, 15 A requirements with extended temperature range (-65°C to 175°C) and ROHS3 compliance. This part is currently active with high inventory availability (53514 units).

STPS2545CG-TR from STMicroelectronics is suitable for applications where 12.5 A current rating is acceptable. This part offers lower forward voltage (570 mV @ 12.5 A) and is ROHS3 compliant.

DSSK28-0045BS-TRL from IXYS meets the 45 V, 15 A requirements with lower forward voltage (480 mV @ 15 A) and ROHS3 compliance. Maximum junction temperature is 150°C.

STPS30L45CG-TR from STMicroelectronics meets the 45 V, 15 A requirements with the lowest forward voltage (550 mV @ 15 A) among available alternatives. Maximum junction temperature is 150°C and ROHS3 compliance is confirmed.

Frequently Asked Questions (FAQ)

Q: Can VS-30CTQ045SHM3 be used as a direct replacement for 30CTQ045STRL?

A: Yes. VS-30CTQ045SHM3 is a parametric equivalent with identical electrical specifications: 45 V reverse voltage, 15 A average rectified current per diode, 620 mV forward voltage at 15 A, and 2 mA reverse leakage at 45 V. Both use the TO-263AB D2PAK package. VS-30CTQ045SHM3 is currently active and ROHS3 compliant.

Q: What is the difference between STPS3045CG-TR and STPS3045CGY-TR?

A: Both parts are electrically identical with 45 V reverse voltage and 15 A average rectified current. The primary difference is that STPS3045CGY-TR carries AEC-Q101 automotive qualification, while STPS3045CG-TR does not. Both are ROHS3 compliant and use the TO-263AB D2PAK package.

Q: Why does STPS2545CG-TR have a lower current rating (12.5 A) than the original part (15 A)?

A: STPS2545CG-TR is rated for 12.5 A average rectified current per diode, compared to 15 A for the 30CTQ045STRL. This part is suitable only for applications where the maximum required current does not exceed 12.5 A. For applications requiring the full 15 A rating, use STPS3045CG-TR, STPS3045CGY-TR, or other 15 A rated alternatives.

Q: Are all substitute parts available in the same packaging as the original 30CTQ045STRL?

A: All listed substitute parts use the TO-263-3 D2PAK (2 Leads + Tab) TO-263AB package, which is mechanically and electrically compatible with the 30CTQ045STRL. Packaging variations (Tape & Reel, Tube, Cut Tape) affect supply format but not component functionality or PCB mounting.

Q: Which substitute part offers the lowest forward voltage drop?

A: STPS30L45CG-TR offers the lowest forward voltage at 550 mV @ 15 A, compared to 620 mV @ 15 A for the original 30CTQ045STRL. DSSK28-0045BS-TRL offers 480 mV @ 15 A but with a lower maximum junction temperature (150°C).

Q: Is RoHS compliance required for my application?

A: The original 30CTQ045STRL is RoHS non-compliant. If RoHS3 compliance is required, select from: VS-30CTQ045SHM3, MBRB30H45CTHE3_B/I, 30CTQ045S, DSSK28-0045BS-TRL, MBRB2545CTT4G, STPS2545CG-TR, STPS3045CG-TR, STPS3045CGY-TR, or STPS30L45CG-TR.

Q: Which substitute parts carry automotive qualification?

A: MBRB30H45CTHE3_B/I, VS-30CTQ045SHM3, and STPS3045CGY-TR carry AEC-Q101 automotive qualification. These parts are suitable for automotive and high-reliability applications.

Q: What is the maximum operating junction temperature for each substitute?

A: Operating junction temperatures vary: 30CTQ045STRL and VS-30CTQ045S-M3 operate to 175°C; MBRB30H45CTHE3_B/I and MBRB2545CTT4G to 175°C; STPS3045CG-TR and STPS3045CGY-TR to 200°C; STPS2545CG-TR to 175°C; DSSK28-0045BS-TRL and STPS30L45CG-TR to 150°C; 30CTQ045S to 175°C.

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