MBR3100G Equivalent & Substitute Parts

Part Overview

The MBR3100G is a Schottky rectifier diode manufactured by onsemi, rated for 100 V DC reverse voltage and 3 A average rectified current in an axial through-hole package (DO-201AA/DO-27). This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Substitute parts are selected based on matching or exceeding electrical performance parameters while maintaining compatible mechanical form factors and thermal characteristics.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	790 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	600 µA @ 100 V
Mounting Type	Through Hole
Package / Case	DO-201AA, DO-27, Axial
Operating Temperature - Junction	-65°C ~ 175°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the MBR3100G are categorized based on the following electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Equal to or greater than 100 V
Technology: Schottky rectifier diode
Mounting Type: Through Hole
Package / Case: Axial configuration (DO-201AA, DO-201AD, or DO-204AC)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Current Rating Categories:

Direct Current Rating Match (3 A): Parts with 3 A average rectified current provide direct functional equivalence to the MBR3100G without circuit redesign. These include SB3100-T and SB3H100-E3/73.

Higher Current Rating (12 A): Parts with 12 A average rectified current (SB12100-AP, SB12100-BP, SB12100-TP) are suitable for applications where the MBR3100G is used and higher current capacity is acceptable or beneficial. These parts maintain the same 100 V reverse voltage rating and fast recovery speed characteristics.

Lower Current Rating (2 A): The SR210H, rated at 2 A, is suitable only for applications where the circuit current demand does not exceed 2 A. This part operates at a lower current level than the MBR3100G and requires verification of circuit current requirements.

Package Compatibility: All substitute parts maintain through-hole axial mounting configuration. Specific package variants (DO-201AD, DO-204AC) are mechanically compatible with standard axial lead spacing and PCB hole patterns.

Parameter Comparison

Parameter	MBR3100G (onsemi)	SB3100-T (Diodes Inc.)	SB3H100-E3/73 (Vishay)	SB12100-AP (MCC)	SB12100-BP (MCC)	SB12100-TP (MCC)	SR210H (TSC)
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	3 A	3 A	3 A	12 A	12 A	12 A	2 A
Voltage - Forward (Vf) (Max) @ If	790 mV @ 3 A	790 mV @ 3 A	800 mV @ 3 A	850 mV @ 12 A	850 mV @ 12 A	850 mV @ 12 A	850 mV @ 2 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)
Current - Reverse Leakage @ Vr	600 µA @ 100 V	500 µA @ 100 V	20 µA @ 100 V	500 µA @ 100 V	500 µA @ 100 V	500 µA @ 100 V	100 µA @ 100 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-201AA, DO-27, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-65°C ~ 175°C	-65°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	REACH Unaffected	REACH Unaffected	REACH Unaffected	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (3 A Current Rating):

SB3100-T (Diodes Incorporated) and SB3H100-E3/73 (Vishay General Semiconductor) are functionally equivalent to the MBR3100G with matching 3 A current ratings and 100 V reverse voltage specifications. Both parts are active products with ROHS3 compliance. SB3H100-E3/73 offers superior reverse leakage characteristics (20 µA vs. 600 µA) and maintains the full -65°C to 175°C junction temperature range of the original part. SB3100-T operates at a reduced maximum junction temperature of 150°C. Both parts are available in DO-201AD axial packages compatible with standard through-hole PCB layouts.

Higher Current Capacity Alternatives (12 A Current Rating):

SB12100-AP, SB12100-BP, and SB12100-TP (all Micro Commercial Co) provide 12 A average rectified current while maintaining 100 V reverse voltage and fast recovery speed characteristics. These parts are suitable for applications where the MBR3100G is specified and higher current capacity is required or beneficial. All three variants are active products with identical electrical specifications. Maximum junction temperature is limited to 150°C. These parts are available in DO-201AD axial packages.

Lower Current Capacity Alternative (2 A Current Rating):

SR210H (Taiwan Semiconductor Corporation) is rated at 2 A average rectified current with 100 V reverse voltage and fast recovery speed. This part is an active product with AEC-Q101 automotive qualification and ROHS3 compliance. The operating temperature range is -55°C to 150°C. This part is suitable only for applications where circuit current requirements do not exceed 2 A and is packaged in DO-204AC (DO-15) axial configuration.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. SB3H100-E3/73 offers the highest inventory availability (54,986 pieces) among active substitutes. SB3100-T provides 1,232 pieces in stock. The 12 A variants (SB12100-AP, SB12100-BP, SB12100-TP) provide combined inventory of 2,260 pieces across three packaging options.

Frequently Asked Questions (FAQ)

Q: Can SB3100-T or SB3H100-E3/73 be used as direct replacements for MBR3100G?

A: Yes. Both parts are Schottky rectifier diodes with identical 100 V reverse voltage and 3 A average rectified current ratings. Both maintain fast recovery speed characteristics and through-hole axial mounting. SB3H100-E3/73 maintains the full -65°C to 175°C junction temperature range of the MBR3100G, while SB3100-T operates to 150°C maximum junction temperature. Both are ROHS3 compliant active products.

Q: Are the 12 A rated parts (SB12100 series) suitable for circuits designed for the 3 A MBR3100G?

A: The SB12100-AP, SB12100-BP, and SB12100-TP parts maintain the same 100 V reverse voltage and fast recovery speed as the MBR3100G. Higher current rating does not prevent use in lower current applications. However, maximum junction temperature is limited to 150°C compared to the MBR3100G specification of 175°C. These parts are packaged in DO-201AD configuration, compatible with standard axial through-hole layouts.

Q: What are the package differences between substitute parts?

A: The MBR3100G is specified in DO-201AA and DO-27 axial packages. SB3100-T and SB3H100-E3/73 are packaged in DO-201AD, which maintains compatible axial lead spacing and through-hole PCB hole patterns. SR210H is packaged in DO-204AC (DO-15), a smaller axial package also compatible with standard through-hole layouts. All packages are axial configuration suitable for through-hole assembly.

Q: How do reverse leakage characteristics compare across substitute options?

A: The MBR3100G specifies 600 µA reverse leakage at 100 V. SB3100-T and SB12100 series parts specify 500 µA at 100 V. SB3H100-E3/73 specifies significantly lower reverse leakage of 20 µA at 100 V. SR210H specifies 100 µA at 100 V. Lower reverse leakage reduces standby current and heat dissipation in applications with sustained reverse bias conditions.

Q: What is the significance of the -65°C to 175°C junction temperature range of the MBR3100G?

A: The MBR3100G operates across a -65°C to 175°C junction temperature range. SB3H100-E3/73 maintains this full range. SB3100-T, all SB12100 variants, and SR210H are limited to 150°C maximum junction temperature. For applications requiring operation above 150°C junction temperature, SB3H100-E3/73 is the appropriate substitute.

Q: Is the SR210H suitable for all MBR3100G applications?

A: SR210H is rated at 2 A average rectified current, which is lower than the MBR3100G specification of 3 A. This part is suitable only for applications where circuit current requirements do not exceed 2 A. SR210H maintains 100 V reverse voltage and fast recovery speed characteristics. The part includes AEC-Q101 automotive qualification and operates from -55°C to 150°C junction temperature.

Q: What packaging options are available for procurement?

A: SB3100-T is available in Cut Tape (CT) packaging. SB3H100-E3/73 is available in Cut Tape (CT) packaging with high inventory (54,986 pieces). SB12100-AP, SB12100-BP, and SB12100-TP are available in Bulk packaging. SR210H is available in Tape & Reel (TR) packaging. Packaging selection depends on procurement volume and assembly process requirements.

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