MBR2550CT Equivalent & Substitute Parts

Part Overview

The MBR2550CT is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with 50 V reverse voltage rating and 15 A average rectified current per diode. The device is packaged in TO-220-3 through-hole configuration and is classified as obsolete. Due to its obsolete product status, equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production and field replacements.

Key Parameters

Parameter	Value
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	750 mV @ 15 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Operating Temperature - Junction	-65°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-220-3
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MBR2550CT is determined by the following critical parameters:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io) (per Diode): 15 A minimum
Mounting Type: Through Hole
Package / Case: TO-220-3

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Lower values are acceptable
Current - Reverse Leakage @ Vr: Lower values are acceptable
Operating Temperature - Junction: Extended ranges are acceptable
Product Status: Active parts are preferred over obsolete
RoHS Compliance: ROHS3 Compliant parts are preferred

Substitute parts are grouped into two categories: MFR Recommended (direct manufacturer recommendations) and Parametric Equivalents (parts meeting all electrical and mechanical requirements).

Parameter Comparison

Parameter	MBR2550CT (Main)	30CTQ050 (Vishay)	STPS30L45CT (STMicroelectronics)	MBR3050CTE3/TU (Microchip)	MBR3050FCTE3/TU (Microchip)
Manufacturer	Diodes Incorporated	Vishay General Semiconductor	STMicroelectronics	Microchip Technology	Microchip Technology
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	45 V	50 V	50 V
Current - Average Rectified (Io) (per Diode)	15 A	15 A	15 A	15 A	15 A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 15 A	620 mV @ 15 A	550 mV @ 15 A	750 mV @ 15 A	750 mV @ 15 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 50 V	800 µA @ 50 V	400 µA @ 45 V	50 µA @ 50 V	50 µA @ 50 V
Operating Temperature - Junction	-65°C ~ 150°C	-55°C ~ 150°C	150°C (Max)	-65°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

MBR3050CTE3/TU and MBR3050FCTE3/TU (Microchip Technology) are parametric equivalents with active product status. Both devices match the MBR2550CT in voltage rating (50 V), current rating (15 A), and forward voltage characteristics (750 mV @ 15 A). These parts offer extended operating temperature range (-65°C ~ 175°C) and superior reverse leakage performance (50 µA @ 50 V). Both are ROHS3 compliant and REACH unaffected, making them suitable for new designs and long-term availability.

STPS30L45CT (STMicroelectronics) is an active product with ROHS3 compliance. This device operates at 45 V reverse voltage, which is 5 V lower than the MBR2550CT. Selection of this part requires confirmation that the application does not require the full 50 V rating. The STPS30L45CT offers superior forward voltage performance (550 mV @ 15 A) and lower reverse leakage (400 µA @ 45 V).

Secondary Substitute (Obsolete Status):

30CTQ050 (Vishay General Semiconductor) is an MFR recommended substitute with identical electrical specifications to the MBR2550CT. However, this part is obsolete and RoHS non-compliant, limiting its use to legacy applications or field replacements where compliance is not required.

Compliance Considerations:

For new designs and applications requiring regulatory compliance, MBR3050CTE3/TU or MBR3050FCTE3/TU are the recommended selections due to active product status and ROHS3 compliance. For applications with 45 V voltage tolerance, STPS30L45CT provides an active alternative with improved electrical performance.

Frequently Asked Questions (FAQ)

Q: Can STPS30L45CT replace MBR2550CT in all applications?

A: STPS30L45CT is a functional substitute only for applications where the maximum reverse voltage requirement does not exceed 45 V. The MBR2550CT is rated for 50 V reverse voltage. If the circuit design requires the full 50 V rating, STPS30L45CT is not suitable. Verify the actual voltage stress in the application before substitution.

Q: What is the difference between MBR3050CTE3/TU and MBR3050FCTE3/TU?

A: Both Microchip parts are parametrically identical in electrical specifications. The difference lies in packaging designation: MBR3050CTE3/TU uses TO-220AB supplier package, while MBR3050FCTE3/TU also uses TO-220AB. Both are supplied in tube packaging and are interchangeable from an electrical and mechanical standpoint.

Q: Is 30CTQ050 suitable for new production?

A: 30CTQ050 is not recommended for new production designs. This part is obsolete and RoHS non-compliant. Use MBR3050CTE3/TU or MBR3050FCTE3/TU for new designs to ensure long-term component availability and regulatory compliance.

Q: How does forward voltage affect circuit performance?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction. Lower forward voltage reduces power dissipation and heat generation. MBR3050CTE3/TU and MBR3050FCTE3/TU match the MBR2550CT at 750 mV @ 15 A. STPS30L45CT offers lower forward voltage (550 mV @ 15 A), resulting in reduced power loss if the 45 V rating is acceptable for the application.

Q: Are all substitute parts pin-compatible with MBR2550CT?

A: All listed substitute parts use TO-220-3 package configuration with through-hole mounting. Pin compatibility is maintained across all substitutes. Physical board layout and thermal management considerations remain unchanged.

Q: What is the significance of reverse leakage current?

A: Reverse leakage current (Ir) represents the small current flowing through the diode when reverse biased. Lower leakage current indicates better diode quality and reduced power loss in standby conditions. MBR3050CTE3/TU and MBR3050FCTE3/TU exhibit superior leakage performance (50 µA @ 50 V) compared to the MBR2550CT (1 mA @ 50 V).

Q: Can MBR2550CT be used as a direct replacement for the substitute parts?

A: MBR2550CT can replace any of the listed substitutes in applications where obsolete component status is acceptable. However, for new designs, active products (MBR3050CTE3/TU, MBR3050FCTE3/TU, or STPS30L45CT) are preferred to ensure long-term availability and compliance with current regulatory requirements.

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