MBRB3045CTTRL Equivalent & Substitute Parts

Part Overview

The MBRB3045CTTRL 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 MBRB3045CTTRL 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. The substitute parts listed maintain electrical and mechanical compatibility while offering active product status and improved compliance certifications.

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
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Moisture Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MBRB3045CTTRL is determined by the following critical parameters:

Electrical Compatibility Requirements:

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

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount (exact match required)
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB (exact match required)
Moisture Sensitivity Level (MSL): 1 (Unlimited) (exact match required)

Substitute parts are grouped into two categories:

Direct Equivalents (Full Parameter Match): Parts that match all electrical and mechanical parameters of the MBRB3045CTTRL, including 15 A current rating.

Functional Equivalents (Reduced Current Rating): Parts that maintain 45 V reverse voltage and Schottky technology in the same package but with reduced average rectified current of 12.5 A. These parts are suitable for applications where the full 15 A rating is not required.

Parameter Comparison

Parameter	MBRB3045CTTRL (Main)	STPS30L45CG-TR	DSSK28-0045BS-TRL	MBRB2545CTT4G	STPS2545CG-TR	STPS2545CGY-TR	STPS3045CG-TR	STPS3045CGY-TR
Manufacturer	Vishay	STMicroelectronics	IXYS	onsemi	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	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	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V	45 V	45 V	45 V	45 V
Current - Average Rectified (Io) (per Diode)	15 A	15 A	15 A	15 A	12.5 A	12.5 A	15 A	15 A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 20 A	550 mV @ 15 A	480 mV @ 15 A	820 mV @ 30 A	570 mV @ 12.5 A	840 mV @ 25 A	570 mV @ 15 A	570 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	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 @ 45 V	400 µA @ 45 V	20 mA @ 45 V	200 µA @ 45 V	125 µA @ 45 V	125 µA @ 45 V	200 µA @ 45 V	200 µA @ 45 V
Operating Temperature - Junction	-65°C ~ 150°C	150°C (Max)	-55°C ~ 150°C	-65°C ~ 175°C	175°C (Max)	-40°C ~ 175°C	200°C (Max)	200°C (Max)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade / AEC-Q101	Not specified	Not specified	Not specified	Not specified	Not specified	AEC-Q101	Not specified	AEC-Q101

Engineering Selection Recommendations

For Direct Replacement (15 A Current Requirement):

STPS30L45CG-TR (STMicroelectronics) is the primary direct equivalent. This part maintains the 45 V reverse voltage and 15 A average rectified current specifications. It is ROHS3 compliant and carries active product status, ensuring long-term availability. The forward voltage is lower (550 mV @ 15 A) compared to the original part, resulting in improved thermal efficiency.

STPS3045CG-TR and STPS3045CGY-TR (STMicroelectronics) are alternative direct equivalents with identical electrical specifications. STPS3045CGY-TR includes AEC-Q101 automotive qualification and is suitable for automotive applications. Both parts feature a maximum junction temperature of 200°C, providing enhanced thermal performance.

MBRB2545CTT4G (onsemi) is a direct equivalent with 15 A current rating and ROHS3 compliance. This part operates across an extended temperature range (-65°C ~ 175°C) and is part of the SWITCHMODE™ series. The forward voltage specification (820 mV @ 30 A) differs from other equivalents.

DSSK28-0045BS-TRL (IXYS) is a direct equivalent with 15 A current rating and ROHS3 compliance. This part maintains the original temperature range (-55°C ~ 150°C) and offers the lowest forward voltage (480 mV @ 15 A) among all substitutes.

For Reduced Current Applications (12.5 A Current Requirement):

STPS2545CG-TR and STPS2545CGY-TR (STMicroelectronics) are functional equivalents with 12.5 A average rectified current. These parts are suitable for applications where the full 15 A rating is not required. STPS2545CGY-TR includes AEC-Q101 automotive qualification and operates across -40°C ~ 175°C. Both parts are ROHS3 compliant with active product status.

Compliance and Availability:

All substitute parts listed are ROHS3 compliant, addressing the RoHS non-compliance status of the original MBRB3045CTTRL. All substitute parts carry active product status, ensuring continued availability and manufacturing support. Parts with AEC-Q101 qualification (STPS3045CGY-TR and STPS2545CGY-TR) are suitable for automotive applications requiring formal qualification.

Frequently Asked Questions (FAQ)

Q: Can STPS2545CG-TR or STPS2545CGY-TR be used as direct replacements for MBRB3045CTTRL?

A: STPS2545CG-TR and STPS2545CGY-TR are functional equivalents with reduced current rating (12.5 A versus 15 A). These parts maintain the same 45 V reverse voltage, Schottky technology, fast recovery speed, and TO-263-3 D2PAK package. They are suitable for applications where the full 15 A current rating is not required. For applications requiring the full 15 A specification, direct equivalents with 15 A rating must be selected.

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 includes AEC-Q101 automotive qualification and operates across -40°C ~ 175°C, while STPS3045CG-TR does not specify automotive qualification. STPS3045CGY-TR is required for automotive applications requiring formal qualification.

Q: Are all substitute parts compatible with the original TO-263-3 D2PAK footprint?

A: All substitute parts listed use the TO-263-3 D2PAK (2 Leads + Tab) surface mount package. Physical footprint compatibility is maintained across all substitutes. Verify PCB layout and thermal management design to ensure adequate heat dissipation for the selected part.

Q: What is the significance of the forward voltage differences among substitute parts?

A: Forward voltage specifications vary among substitutes due to different semiconductor process technologies and measurement conditions. DSSK28-0045BS-TRL offers the lowest forward voltage (480 mV @ 15 A), resulting in lower power dissipation and improved thermal efficiency. MBRB2545CTT4G has the highest forward voltage (820 mV @ 30 A). Forward voltage differences affect thermal design and power efficiency calculations.

Q: Why is STPS30L45CG-TR recommended as the primary substitute?

A: STPS30L45CG-TR maintains full electrical equivalence (45 V, 15 A) with the original part, is ROHS3 compliant, carries active product status, and offers improved forward voltage characteristics (550 mV @ 15 A). This combination ensures design continuity while providing compliance benefits and long-term availability.

Q: Are there temperature range considerations when selecting a substitute?

A: The original MBRB3045CTTRL operates from -65°C ~ 150°C. Substitute parts offer varying temperature ranges. STPS3045CG-TR and STPS3045CGY-TR extend to 200°C maximum junction temperature, providing enhanced thermal margin. MBRB2545CTT4G operates to 175°C. For applications with specific temperature requirements, verify that the selected substitute meets the design specifications.

Q: What is the MSL (Moisture Sensitivity Level) for all parts?

A: All parts listed, including the original MBRB3045CTTRL and all substitutes, have MSL 1 (Unlimited). This indicates unlimited shelf life without moisture control requirements, simplifying storage and handling procedures.

Q: Is RoHS compliance a critical factor in selecting a substitute?

A: The original MBRB3045CTTRL is RoHS non-compliant. All substitute parts are ROHS3 compliant. For new designs and applications subject to RoHS regulations, ROHS3 compliance is mandatory. For legacy systems, compliance requirements depend on regional regulations and customer specifications.

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