30CTQ045S Equivalent & Substitute Parts

Part Overview

The 30CTQ045S is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode with 45V reverse voltage rating and 15A 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 components 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	620 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	2 mA @ 45 V
Operating Temperature - Junction	-55°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the 30CTQ045S is determined by the following critical parameters that must be matched or exceeded:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V minimum
Current - Average Rectified (Io) (per Diode): 15 A minimum
Mounting Type: Surface Mount
Package / Case: TO-263-3, D2PAK (2 Leads + Tab)

Performance Parameters:

Voltage - Forward (Vf) (Max) @ If: 620 mV @ 15 A or lower
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 2 mA @ 45 V or lower
Operating Temperature - Junction: -55°C ~ 175°C or wider range

Substitute parts are grouped into two categories: Vishay parametric equivalents with active product status and RoHS3 compliance, and manufacturer-recommended alternatives from other suppliers that meet the electrical and mechanical specifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Max)	Product Status	RoHS Status	Packaging
30CTQ045S	Vishay	45 V	15 A	620 mV @ 15 A	2 mA @ 45 V	175°C	Obsolete	RoHS non-compliant	Bulk
VS-30CTQ045STRL-M3	Vishay	45 V	15 A	620 mV @ 15 A	2 mA @ 45 V	175°C	Active	ROHS3 Compliant	Tape & Reel (TR)
VS-30CTQ045STRLHM3	Vishay	45 V	15 A	620 mV @ 15 A	2 mA @ 45 V	175°C	Active	ROHS3 Compliant	Tape & Reel (TR)
VS-30CTQ045STRR-M3	Vishay	45 V	15 A	620 mV @ 15 A	2 mA @ 45 V	175°C	Active	Not specified	Tape & Reel (TR)
VS-30CTQ045STRRHM3	Vishay	45 V	15 A	620 mV @ 15 A	2 mA @ 45 V	175°C	Active	ROHS3 Compliant	Tape & Reel (TR)
DSSK28-0045BS-TRL	IXYS	45 V	15 A	480 mV @ 15 A	20 mA @ 45 V	150°C	Active	ROHS3 Compliant	Tape & Reel (TR)
MBRB2545CTT4G	onsemi	45 V	15 A	820 mV @ 30 A	200 µA @ 45 V	175°C	Active	ROHS3 Compliant	Tape & Reel (TR)
STPS2545CG-TR	STMicroelectronics	45 V	12.5 A	570 mV @ 12.5 A	125 µA @ 45 V	175°C	Active	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
STPS3045CG-TR	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	200°C	Active	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
STPS3045CGY-TR	STMicroelectronics	45 V	15 A	570 mV @ 15 A	200 µA @ 45 V	200°C	Active	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
STPS30L45CG-TR	STMicroelectronics	45 V	15 A	550 mV @ 15 A	400 µA @ 45 V	150°C	Active	ROHS3 Compliant	Tape & Reel (TR)

Engineering Selection Recommendations

Vishay Parametric Equivalents (Preferred for Direct Replacement)

The VS-30CTQ045STRL-M3, VS-30CTQ045STRLHM3, VS-30CTQ045STRR-M3, and VS-30CTQ045STRRHM3 are parametric equivalents manufactured by Vishay with identical electrical specifications to the 30CTQ045S. All four variants are active products with RoHS3 compliance. The primary differences are packaging format (Tape & Reel) and automotive qualification status. VS-30CTQ045STRLHM3 and VS-30CTQ045STRRHM3 include AEC-Q101 automotive qualification. Selection between these variants depends on packaging requirements and automotive application needs.

STMicroelectronics Alternatives

STPS3045CG-TR and STPS3045CGY-TR provide identical electrical performance with improved forward voltage characteristics (570 mV @ 15 A versus 620 mV @ 15 A) and extended maximum junction temperature (200°C versus 175°C). STPS3045CGY-TR includes AEC-Q101 automotive qualification. STPS30L45CG-TR offers the lowest forward voltage (550 mV @ 15 A) but operates at a lower maximum junction temperature (150°C). STPS2545CG-TR is rated for 12.5A, which is below the 15A requirement and is not suitable for direct replacement.

IXYS Alternative

DSSK28-0045BS-TRL meets the 45V and 15A specifications with superior forward voltage performance (480 mV @ 15 A). However, it exhibits higher reverse leakage current (20 mA @ 45 V versus 2 mA @ 45 V) and lower maximum junction temperature (150°C versus 175°C).

onsemi Alternative

MBRB2545CTT4G meets all electrical specifications with extended operating temperature range (-65°C ~ 175°C). Forward voltage is specified at 30A rather than 15A, limiting direct comparison at the 15A operating point.

Frequently Asked Questions (FAQ)

Q: Can the 30CTQ045S be directly replaced with VS-30CTQ045STRL-M3?

A: Yes. VS-30CTQ045STRL-M3 is a parametric equivalent with identical electrical specifications, same package type (TO-263-3 D2PAK), and active product status. The primary difference is packaging format (Tape & Reel versus bulk). Both are manufactured by Vishay.

Q: What is the difference between the Vishay variants (STRL-M3, STRLHM3, STRR-M3, STRRHM3)?

A: All four Vishay variants share identical electrical specifications. The differences are: STRL-M3 and STRLHM3 use standard reel packaging; STRR-M3 and STRRHM3 use alternate reel configuration. STRLHM3 and STRRHM3 include AEC-Q101 automotive qualification. Selection depends on packaging requirements and automotive application compliance needs.

Q: Why is STPS2545CG-TR not recommended as a substitute?

A: STPS2545CG-TR is rated for 12.5A average rectified current per diode, which is below the 30CTQ045S specification of 15A. This part does not meet the mandatory current requirement.

Q: How do the STMicroelectronics parts compare to the original 30CTQ045S?

A: STPS3045CG-TR and STPS3045CGY-TR provide superior forward voltage performance (570 mV @ 15 A versus 620 mV @ 15 A) and higher maximum junction temperature (200°C versus 175°C). STPS30L45CG-TR offers the lowest forward voltage (550 mV @ 15 A) but operates at a lower maximum junction temperature (150°C). All three meet the 45V and 15A specifications.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed are RoHS3 compliant. The original 30CTQ045S is RoHS non-compliant, making RoHS3-compliant substitutes necessary for new designs and procurement requiring environmental compliance.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 qualification indicates the part meets automotive industry reliability standards. VS-30CTQ045STRLHM3, VS-30CTQ045STRRHM3, and STPS3045CGY-TR carry this qualification for applications requiring automotive-grade components.

Q: Can I use DSSK28-0045BS-TRL as a substitute despite higher reverse leakage?

A: DSSK28-0045BS-TRL meets the 45V and 15A specifications and offers superior forward voltage performance. However, reverse leakage current is 20 mA @ 45 V compared to 2 mA @ 45 V for the original part. Application-specific leakage requirements must be evaluated before selection.

Q: What packaging options are available for substitutes?

A: Vishay variants are supplied in Tape & Reel (TR) format. STMicroelectronics STPS3045CG-TR and STPS3045CGY-TR are available in Cut Tape (CT) & Digi-Reel® format. STPS30L45CG-TR and DSSK28-0045BS-TRL are supplied in Tape & Reel (TR) format. MBRB2545CTT4G is supplied in Tape & Reel (TR) format.

Q: Is the operating temperature range important for my application?

A: Yes. The original 30CTQ045S operates from -55°C to 175°C. Most substitutes maintain this range or extend it. STPS3045CG-TR and STPS3045CGY-TR extend to 200°C maximum junction temperature. DSSK28-0045BS-TRL and STPS30L45CG-TR are limited to 150°C maximum. Application temperature requirements must be verified against selected substitute specifications.

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