SBG1040CT Equivalent & Substitute Parts

Part Overview

The SBG1040CT is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with a maximum reverse voltage of 40 V and average rectified current of 10 A per diode. The device is housed in a TO-263-3 D2PAK surface mount package with 2 leads plus tab. This part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io) (per Diode)	10 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Operating Temperature - Junction	-65°C ~ 125°C
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the SBG1040CT is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

Diode configuration: 1 pair common cathode
Technology: Schottky
Maximum reverse voltage: 40 V
Average rectified current per diode: 10 A
Forward voltage: 550 mV @ 5 A
Recovery speed: Fast recovery ≤ 500 ns, > 200 mA

Mechanical Parameters (Must Match):

Package type: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting type: Surface mount

Operational Parameters (Must Match):

Junction temperature range: -65°C to 125°C minimum

The MBRB1040CT-TP manufactured by Micro Commercial Co satisfies all electrical and mechanical equivalence criteria, enabling direct substitution in applications requiring the SBG1040CT.

Parameter Comparison

Parameter	SBG1040CT (Diodes Inc.)	MBRB1040CT-TP (Micro Commercial Co)
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	40 V
Current - Average Rectified (Io) (per Diode)	10 A	10 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 5 A	550 mV @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Operating Temperature - Junction	-65°C ~ 125°C	-55°C ~ 125°C
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Mounting Type	Surface Mount	Surface Mount
Current - Reverse Leakage @ Vr	1 mA @ 40 V	500 µA @ 40 V
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Not For New Designs

Engineering Selection Recommendations

The MBRB1040CT-TP is electrically and mechanically equivalent to the SBG1040CT across all critical parameters required for direct substitution. The substitute part demonstrates superior reverse leakage characteristics (500 µA versus 1 mA at 40 V) and achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. The MBRB1040CT-TP operates across a slightly narrower junction temperature range (-55°C to 125°C versus -65°C to 125°C), which is acceptable for most applications operating within standard industrial temperature limits. Both parts are packaged identically in TO-263-3 D2PAK surface mount configuration, ensuring PCB layout compatibility without modification. The substitute part is designated "Not For New Designs," indicating limited long-term availability; however, it remains suitable for legacy system support and repair applications where the SBG1040CT is no longer obtainable.

Frequently Asked Questions (FAQ)

Q: Can the MBRB1040CT-TP be used as a direct replacement for the SBG1040CT without PCB modifications?

A: Yes. Both parts are housed in identical TO-263-3 D2PAK packages with 2 leads plus tab. Pin configuration and footprint are equivalent, requiring no PCB layout changes.

Q: What is the significance of the reverse leakage current difference between the two parts?

A: The MBRB1040CT-TP exhibits lower reverse leakage (500 µA at 40 V) compared to the SBG1040CT (1 mA at 40 V). This represents superior leakage performance and may provide marginal benefits in low-power standby applications, though both values are within acceptable ranges for standard rectification circuits.

Q: Does the narrower operating temperature range of the MBRB1040CT-TP (-55°C to 125°C) limit its application?

A: The substitute part's temperature range is suitable for applications operating within standard industrial and commercial temperature limits. Applications requiring operation below -55°C junction temperature require evaluation against specific system requirements.

Q: What is the impact of RoHS compliance differences between these parts?

A: The MBRB1040CT-TP is ROHS3 compliant, whereas the SBG1040CT is RoHS non-compliant. For new designs or applications subject to RoHS regulations, the substitute part is preferred. For legacy systems already deployed with non-compliant components, either part is acceptable for repair and maintenance.

Q: Are there packaging differences between the two parts?

A: Both parts are supplied in TO-263-3 D2PAK surface mount packages. The SBG1040CT is available in standard packaging, while the MBRB1040CT-TP is supplied in Tape & Reel (TR) format. This difference affects procurement and handling but does not impact electrical or mechanical compatibility.

Q: What is the product status significance for each part?

A: The SBG1040CT is discontinued at DiGi Electronics, making it unavailable through standard distribution channels. The MBRB1040CT-TP is designated "Not For New Designs," indicating limited future availability. Both statuses necessitate substitution planning for ongoing production support.

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