30CTQ050 Equivalent & Substitute Parts

Part Overview

The 30CTQ050 is a Schottky diode array manufactured by SMC Diode Solutions, configured as a 1 Pair Common Cathode rectifier with a maximum reverse voltage rating of 50 V and average rectified current of 15 A per diode. The device is packaged in a Through Hole TO-220-3 configuration and is currently in Active product status with 1184 pieces in stock.

Equivalent and substitute parts are identified when applications require alternative sourcing due to component availability, supply chain considerations, or when design specifications permit operation within the electrical and mechanical parameters of alternative devices. Substitute parts must maintain compatibility with the TO-220-3 Through Hole mounting standard and preserve the 1 Pair Common Cathode diode configuration.

Key Parameters

Parameter	30CTQ050
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io) (per Diode)	15 A
Voltage - Forward (Vf) (Max) @ If	620 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Through Hole
Package / Case	TO-220-3
Operating Temperature - Junction	-55°C ~ 175°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 30CTQ050 are qualified based on the following criteria:

Mandatory Compatibility Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Mounting Type: Through Hole
Package / Case: TO-220-3
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Electrical Parameter Compatibility: Substitute parts must operate within the electrical specifications of the application. The 30CTQ050 establishes a baseline with 50 V maximum reverse voltage and 15 A average rectified current per diode. Substitute parts with lower voltage ratings (45 V) are suitable for applications where the circuit voltage does not exceed the substitute part's rating. Substitute parts with equal or higher current ratings (15 A or 20 A) maintain or exceed the current handling capability of the primary part.

Identified Substitute Parts:

MBR20L45CTG (onsemi): 45 V, 10 A — Reduced current rating
MBR2545CTG (onsemi): 45 V, 15 A — Matched current rating
STPS40L45CT (STMicroelectronics): 45 V, 20 A — Increased current rating

Parameter Comparison

Parameter	30CTQ050	MBR20L45CTG	MBR2545CTG	STPS40L45CT
Manufacturer	SMC Diode Solutions	onsemi	onsemi	STMicroelectronics
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)	50 V	45 V	45 V	45 V
Current - Average Rectified (Io) (per Diode)	15 A	10 A	15 A	20 A
Voltage - Forward (Vf) (Max) @ If	620 mV @ 15 A	500 mV @ 10 A	620 mV @ 15 A	530 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 50 V	500 µA @ 45 V	200 µA @ 45 V	600 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 150°C	-65°C ~ 175°C	Max 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Active	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MBR2545CTG (onsemi)

The MBR2545CTG is the primary substitute for the 30CTQ050. This device maintains identical current rating (15 A) and forward voltage characteristics (620 mV @ 15 A), with a reduced reverse voltage rating of 45 V. The MBR2545CTG is in Active product status with 15312 pieces in stock. Operating temperature range extends to -65°C minimum, exceeding the 30CTQ050 specification. ROHS3 compliance and REACH Unaffected status are maintained. This substitute is suitable for applications where circuit voltage does not exceed 45 V.

STPS40L45CT (STMicroelectronics)

The STPS40L45CT provides increased current capacity at 20 A per diode with a 45 V reverse voltage rating. Forward voltage is 530 mV @ 20 A, representing improved efficiency compared to the 30CTQ050. The device is in Active product status with 17860 pieces in stock. Operating temperature maximum is 150°C, which is lower than the 30CTQ050 specification of 175°C. ROHS3 compliance is maintained. This substitute accommodates higher current demands within the 45 V voltage constraint.

MBR20L45CTG (onsemi)

The MBR20L45CTG is in Obsolete product status and is not recommended for new designs. Although it maintains the TO-220-3 package and Schottky technology, the reduced current rating of 10 A and obsolete status make this substitute unsuitable for ongoing component selection.

Frequently Asked Questions (FAQ)

Q: Can the MBR2545CTG replace the 30CTQ050 in all applications?

A: The MBR2545CTG is suitable for applications where the circuit voltage does not exceed 45 V. The 30CTQ050 has a 50 V rating, so substitution is valid only when the actual operating voltage is confirmed to remain below 45 V. Both devices share identical current rating (15 A) and forward voltage characteristics (620 mV @ 15 A), ensuring electrical compatibility within this voltage constraint.

Q: What is the impact of the lower reverse voltage rating on substitute parts?

A: All identified substitute parts have a 45 V maximum reverse voltage rating compared to the 30CTQ050 at 50 V. This difference is significant only if the application circuit voltage approaches or exceeds 45 V. For circuits operating at 45 V or below, the substitute parts provide equivalent reverse voltage protection. Circuit design review is necessary to confirm voltage compliance.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. The 30CTQ050, MBR2545CTG, and STPS40L45CT are all packaged in TO-220-3 Through Hole configuration. Physical mounting compatibility is maintained across all three devices. The MBR20L45CTG is also TO-220-3 packaged but is in Obsolete status.

Q: How do forward voltage differences affect circuit performance?

A: The 30CTQ050, MBR2545CTG, and STPS40L45CT all specify 620 mV, 620 mV, and 530 mV forward voltage respectively at their rated currents. The STPS40L45CT exhibits lower forward voltage loss, resulting in reduced power dissipation. The MBR20L45CTG specifies 500 mV @ 10 A, which is not directly comparable due to the different current rating. Forward voltage differences directly impact thermal performance and efficiency in rectification circuits.

Q: What is the significance of reverse leakage current specifications?

A: Reverse leakage current indicates the small current flowing through the diode when reverse biased. The 30CTQ050 specifies 1 mA @ 50 V, while substitutes range from 200 µA to 600 µA at 45 V. Lower leakage current in substitute parts (MBR2545CTG at 200 µA) indicates superior reverse bias performance. This parameter is critical in precision rectification and low-power applications where leakage current contributes to overall circuit current consumption.

Q: Are there temperature range considerations for substitute selection?

A: The 30CTQ050 operates from -55°C to 175°C. The MBR2545CTG extends the minimum temperature to -65°C while maintaining the 175°C maximum. The STPS40L45CT and MBR20L45CTG are limited to 150°C maximum. For applications requiring operation at temperatures above 150°C, only the 30CTQ050 and MBR2545CTG are suitable.

Q: What compliance certifications are maintained across all parts?

A: All active substitute parts (MBR2545CTG and STPS40L45CT) maintain ROHS3 compliance. The 30CTQ050 is ROHS3 Compliant and REACH Affected. The MBR2545CTG and STPS40L45CT are ROHS3 Compliant and REACH Unaffected. All devices carry EAR99 ECCN classification and 8541.10.0080 HTSUS code. Moisture Sensitivity Level is 1 (Unlimited) for the 30CTQ050 and STPS40L45CT, indicating no moisture sensitivity constraints.

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