MBRB20100CT Equivalent & Substitute Parts

Part Overview

The MBRB20100CT is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with 100V reverse voltage rating and 10A average rectified current per diode. The device is packaged in TO-263-3 (D2PAK) surface mount configuration and is part of the SWITCHMODE™ series. This part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io) (per Diode)	10	A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	100	µA @ 100 V
Operating Temperature - Junction	-65°C ~ 175°C	—
Mounting Type	Surface Mount	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the MBRB20100CT is determined by the following critical parameters:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 100 V
Mounting Type: Surface Mount
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Allowable Variation Parameters:

Current - Average Rectified (Io) (per Diode): Equal to or greater than 10A
Voltage - Forward (Vf) (Max) @ If: Within acceptable circuit operating margins
Current - Reverse Leakage @ Vr: Within acceptable circuit operating margins
Operating Temperature - Junction: Minimum -55°C to maximum 150°C or higher

Substitute parts are grouped into two categories based on mounting configuration:

Category 1: Surface Mount D2PAK Substitutes — Direct pin-compatible replacements maintaining TO-263-3 D2PAK packaging. These parts are electrically and mechanically interchangeable with the MBRB20100CT.

Category 2: Through Hole TO-220 Substitute — Alternative package configuration requiring PCB layout modification. Electrical specifications remain compatible but mounting method differs.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io per Diode [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Tj (Min~Max) [°C]	Package	Product Status	RoHS Status
MBRB20100CT	onsemi	100	10	850 @ 10A	100 @ 100V	-65 ~ 175	TO-263-3 D2PAK	Obsolete	Non-compliant
MBRB20100CTT4G	onsemi	100	10	850 @ 10A	100 @ 100V	-65 ~ 175	TO-263-3 D2PAK	Active	ROHS3 Compliant
MBRB20100CT-E3/4W	Vishay General Semiconductor - Diodes Division	100	10	800 @ 10A	100 @ 100V	-65 ~ 150	TO-263-3 D2PAK	Active	ROHS3 Compliant
MBRB20100CT-TP	Micro Commercial Co	100	20	850 @ 10A	150 @ 100V	-55 ~ 150	TO-263-3 D2PAK	Active	ROHS3 Compliant
SDT20100CTB-13	Diodes Incorporated	100	10	710 @ 10A	80 @ 100V	-55 ~ 150	TO-263-3 D2PAK	Active	ROHS3 Compliant
SRS16100 MNG	Taiwan Semiconductor Corporation	100	16	900 @ 8A	100 @ 100V	-55 ~ 150	TO-263-3 D2PAK	Active	ROHS3 Compliant
STPS20H100CT	STMicroelectronics	100	10	770 @ 10A	4.5 @ 100V	—	TO-220-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: MBRB20100CTT4G (onsemi)

The MBRB20100CTT4G is the direct functional equivalent of the obsolete MBRB20100CT. Both parts are manufactured by onsemi, share identical electrical specifications, and use the same TO-263-3 D2PAK package. The primary distinction is product status: MBRB20100CTT4G is active and ROHS3 compliant, whereas the original part is obsolete and non-compliant. This part provides seamless integration into existing designs without PCB modification.

Secondary Recommendations: MBRB20100CT-E3/4W (Vishay) and SDT20100CTB-13 (Diodes Incorporated)

Both parts maintain the 100V/10A electrical specification and TO-263-3 D2PAK package compatibility. MBRB20100CT-E3/4W offers lower forward voltage (800 mV vs. 850 mV), improving efficiency in power conversion applications. SDT20100CTB-13 provides superior reverse leakage characteristics (80 µA vs. 100 µA), beneficial for low-leakage circuit requirements. Both are ROHS3 compliant and active products.

Higher Current Alternative: MBRB20100CT-TP (Micro Commercial Co)

This part doubles the current rating to 20A per diode while maintaining 100V reverse voltage and D2PAK packaging. Selection is appropriate for applications requiring increased current capacity without package size change. Reverse leakage is elevated to 150 µA, which may require circuit evaluation.

Higher Current Alternative: SRS16100 MNG (Taiwan Semiconductor Corporation)

This part provides 16A per diode rating with 100V reverse voltage in D2PAK packaging. Forward voltage is specified at 8A (900 mV) rather than 10A, requiring application-specific evaluation. Suitable for intermediate current requirements between 10A and 20A.

Through Hole Alternative: STPS20H100CT (STMicroelectronics)

This part maintains 100V/10A electrical specifications but uses TO-220-3 through-hole packaging instead of surface mount D2PAK. Selection requires PCB redesign and is appropriate only when through-hole mounting is preferred or required. Reverse leakage is significantly lower (4.5 µA), offering superior performance in low-leakage applications.

Frequently Asked Questions (FAQ)

Q: Can MBRB20100CTT4G directly replace MBRB20100CT without PCB modification?

A: Yes. MBRB20100CTT4G is electrically and mechanically identical to MBRB20100CT. Both use TO-263-3 D2PAK packaging with identical pin configuration. No PCB layout changes are required.

Q: What is the difference between MBRB20100CT-E3/4W and the original part?

A: MBRB20100CT-E3/4W is manufactured by Vishay rather than onsemi and offers lower forward voltage (800 mV vs. 850 mV at 10A). The maximum junction temperature is 150°C versus 175°C for the original. Both share identical 100V/10A ratings and D2PAK packaging. The lower forward voltage reduces power dissipation in rectification circuits.

Q: Can MBRB20100CT-TP be used in place of MBRB20100CT?

A: MBRB20100CT-TP is electrically compatible and uses identical D2PAK packaging. However, it is rated for 20A per diode versus 10A for the original part. This higher rating does not prevent substitution; the circuit will operate within the part's capability. Reverse leakage is higher (150 µA vs. 100 µA), which may affect low-leakage circuit performance.

Q: Why is SDT20100CTB-13 preferred for low-leakage applications?

A: SDT20100CTB-13 specifies reverse leakage of 80 µA at 100V, compared to 100 µA for MBRB20100CT. This 20% reduction in leakage current is significant in precision rectification and low-power standby circuits where leakage contributes to overall system power consumption.

Q: Is STPS20H100CT suitable as a substitute?

A: STPS20H100CT maintains 100V/10A electrical specifications and is ROHS3 compliant. However, it uses TO-220-3 through-hole packaging instead of TO-263-3 surface mount D2PAK. Substitution requires PCB redesign and is appropriate only when through-hole mounting is required or preferred. The significantly lower reverse leakage (4.5 µA) offers performance benefits in specific applications.

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

A: Forward voltage differences directly affect power dissipation during conduction. SDT20100CTB-13 at 710 mV and MBRB20100CT-E3/4W at 800 mV dissipate less power than the original MBRB20100CT at 850 mV. In high-current or continuous-duty applications, lower forward voltage reduces thermal load on the component and PCB. Circuit thermal analysis is necessary to determine if differences are significant for specific applications.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant. The original MBRB20100CT is non-compliant. Compliance status is relevant for applications subject to environmental regulations or customer requirements.

Q: Can SRS16100 MNG replace MBRB20100CT in all applications?

A: SRS16100 MNG is electrically compatible with 100V reverse voltage and D2PAK packaging. The 16A per diode rating exceeds the 10A requirement. However, forward voltage is specified at 8A (900 mV) rather than 10A, making direct comparison difficult. Circuit evaluation is necessary to confirm suitability for specific current and thermal conditions.

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