MBR10100CT-LJ Equivalent & Substitute Parts

Part Overview

The MBR10100CT-LJ is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 100 V DC reverse voltage and 5 A average rectified current per diode. Manufactured by Diodes Incorporated, this component is packaged in TO-220-3 through-hole format and qualified to AEC-Q101 automotive standards. The part is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io) (per Diode)	5 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 5 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction	-55°C ~ 175°C
Mounting Type	Through Hole
Package / Case	TO-220-3
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MBR10100CT-LJ is determined by the following critical parameters:

Mandatory Matching Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 100 V
Mounting Type: Through Hole
Package / Case: TO-220-3

Allowable Variation Criteria:

Current - Average Rectified (Io) (per Diode): Equal to or greater than 5 A
Voltage - Forward (Vf) (Max) @ If: May vary within acceptable circuit operating margins
Operating Temperature - Junction: Minimum -55°C and maximum ≥ 150°C
Current - Reverse Leakage @ Vr: May vary
Product Status: Active or Obsolete parts with equivalent electrical specifications

Substitute parts are grouped based on current rating capability. Parts rated at 5 A, 10 A, or 20 A per diode are all acceptable substitutes provided they maintain the 100 V reverse voltage rating and TO-220-3 package format.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Temp Range (Junction)	Package	Status
MBR10100CT-LJ	Diodes Incorporated	100 V	5 A	840 mV @ 5 A	-55°C ~ 175°C	TO-220-3	Obsolete
MBR10100CT-G1	Diodes Incorporated	100 V	5 A	840 mV @ 5 A	-55°C ~ 150°C	TO-220-3	Active
DST20100C	Littelfuse Inc.	100 V	10 A	550 mV @ 10 A	-55°C ~ 150°C	TO-220-3	Active
DST30100C	Littelfuse Inc.	100 V	10 A	750 mV @ 15 A	-55°C ~ 150°C	TO-220-3	Active
DST40100C	Littelfuse Inc.	100 V	20 A	750 mV @ 20 A	-55°C ~ 150°C	TO-220-3	Active
MBR10100CT	Taiwan Semiconductor Corporation	100 V	10 A	950 mV @ 10 A	-55°C ~ 150°C	TO-220-3	Discontinued
MBR20100CTP	Littelfuse Inc.	100 V	10 A	900 mV @ 10 A	-55°C ~ 150°C	TO-220-3	Active
NTST40100CTG	onsemi	100 V	20 A	800 mV @ 20 A	-40°C ~ 150°C	TO-220-3	Obsolete

Engineering Selection Recommendations

Primary Substitute: MBR10100CT-G1

MBR10100CT-G1 is the direct equivalent from Diodes Incorporated with identical electrical specifications to the MBR10100CT-LJ. This part maintains the same 5 A current rating, 100 V reverse voltage, and 840 mV forward voltage at 5 A. The part is currently active with 1109 units in stock. The operating temperature range is reduced to -55°C ~ 150°C compared to the original -175°C maximum, which is acceptable for most automotive applications. This part is ROHS3 compliant and AEC-Q101 qualified.

Secondary Substitutes: DST20100C, DST30100C, MBR20100CTP

These parts provide higher current ratings (10 A per diode) while maintaining the 100 V reverse voltage specification and TO-220-3 package format. These are suitable for applications where the original 5 A rating provides insufficient margin or where higher current capacity is required. All three parts are active with substantial inventory availability. Forward voltage characteristics vary slightly but remain within acceptable operating parameters for Schottky diode applications.

Higher Current Alternative: DST40100C

DST40100C offers 20 A per diode rating with 100 V reverse voltage in TO-220-3 package. This part is appropriate for applications requiring significantly higher current capacity. The part is currently active with 707 units in stock.

Compliance Considerations:

All recommended active substitutes maintain ROHS3 compliance and are suitable for automotive applications. MBR10100CT-G1 retains AEC-Q101 qualification matching the original part. Littelfuse parts (DST series and MBR20100CTP) are REACH unaffected and provide long-term supply stability.

Frequently Asked Questions (FAQ)

Q: Can MBR10100CT-G1 be used as a direct replacement for MBR10100CT-LJ?

A: Yes. MBR10100CT-G1 is electrically equivalent with identical 5 A current rating, 100 V reverse voltage, and 840 mV forward voltage at 5 A. Both are Schottky diode arrays in 1 Pair Common Cathode configuration with TO-220-3 packaging. The primary difference is operating temperature range: MBR10100CT-G1 operates to 150°C maximum versus 175°C for the original part. For most automotive applications, this difference is not significant.

Q: What is the difference between 5 A and 10 A rated parts?

A: The current rating indicates the maximum average rectified current per diode. A 10 A part (such as DST20100C or MBR20100CTP) can safely conduct twice the current of a 5 A part. In applications where the original 5 A rating is adequate, either 5 A or 10 A parts are acceptable. Higher-rated parts provide additional design margin and thermal headroom.

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

A: Yes. All substitute parts listed are mounted in TO-220-3 through-hole package format. Pin configuration and mechanical dimensions are identical, allowing direct board-level substitution without layout modifications.

Q: What does "1 Pair Common Cathode" configuration mean?

A: This describes the internal diode arrangement. The part contains two diodes with a shared cathode connection. This configuration is essential for certain rectifier and protection circuit topologies. All substitute parts maintain this same configuration.

Q: Why do forward voltage specifications vary between parts?

A: Forward voltage (Vf) varies based on the specific diode design, current rating, and manufacturing process. Littelfuse DST series parts show lower forward voltages (550-750 mV) compared to Diodes Incorporated and Taiwan Semiconductor parts (840-950 mV). Lower forward voltage reduces power dissipation and heat generation. All values remain within acceptable Schottky diode operating ranges.

Q: Is ROHS3 compliance maintained across all substitutes?

A: Yes. All substitute parts listed are ROHS3 compliant, meeting environmental and hazardous substance restrictions.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. MBR10100CT-G1 maintains this qualification, ensuring suitability for automotive applications. Other substitutes are suitable for general industrial and automotive use but may not carry explicit AEC-Q101 marking.

Q: Can obsolete parts like NTST40100CTG be used?

A: NTST40100CTG is electrically compatible with 100 V reverse voltage and 20 A current rating in TO-220-3 package. However, as an obsolete part, long-term availability cannot be assured. Active alternatives such as DST40100C are preferred for new designs and ongoing production.

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