MBR3100RL Equivalent & Substitute Parts

Part Overview

The MBR3100RL is a Schottky rectifier diode rated for 100 V DC reverse voltage and 3 A average rectified current in a through-hole axial package (DO-201AA, DO-27). This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for new designs and ongoing production requirements. The MBR3100RL exhibits fast recovery characteristics with switching speeds ≤ 500 ns at currents > 200 mA, making it suitable for high-frequency rectification applications. Equivalent parts must maintain electrical performance within the specified voltage and current parameters while accommodating modern packaging and compliance standards.

Key Parameters

Parameter	Value	Unit
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 ≤ 500 ns, > 200 mA (Io)	—
Current - Reverse Leakage @ Vr	600	µA @ 100 V
Mounting Type	Through Hole	—
Package / Case	DO-201AA, DO-27, Axial	—
Operating Temperature - Junction	-65 to 175	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the MBR3100RL is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 3 A minimum
Technology: Schottky
Mounting Type: Through Hole
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Package Compatibility: Substitute parts must use axial through-hole packages compatible with DO-201AA, DO-27, or DO-201AD form factors.

Grouping Logic:

Group 1 - Direct Electrical Equivalents (3 A Rating): Parts with identical 3 A current rating and 100 V voltage rating maintain the same electrical performance envelope as the MBR3100RL. These include MBR3100RLG, SB3100-T, SB3100E-G, SB3H100-E3/73, SR3010-AP, SR3010-BP, and SR3010-TP.

Group 2 - Higher Current Capacity (12 A Rating): Parts rated for 12 A average rectified current (SB12100-AP, SB12100-BP, SB12100-TP) exceed the MBR3100RL current specification. These parts are electrically compatible for applications requiring the MBR3100RL but offer increased current handling capacity. Forward voltage increases to 850 mV at the higher 12 A rating.

All substitute parts maintain the 100 V reverse voltage rating, fast recovery speed characteristic, and through-hole axial mounting configuration.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package	Tj (Max) [°C]	Product Status
MBR3100RL	onsemi	100	3	790 @ 3 A	600 @ 100 V	DO-201AA, DO-27	175	Obsolete
MBR3100RLG	onsemi	100	3	790 @ 3 A	600 @ 100 V	DO-201AA, DO-27	175	Active
SB3100-T	Diodes Incorporated	100	3	790 @ 3 A	500 @ 100 V	DO-201AD	150	Active
SB3100E-G	Comchip Technology	100	3	850 @ 3 A	500 @ 100 V	DO-201AD	150	Active
SB3H100-E3/73	Vishay General Semiconductor - Diodes Division	100	3	800 @ 3 A	20 @ 100 V	DO-201AD	175	Active
SR3010-AP	Micro Commercial Co	100	3	850 @ 3 A	1000 @ 100 V	DO-201AD	125	Active
SR3010-BP	Micro Commercial Co	100	3	850 @ 3 A	1000 @ 100 V	DO-201AD	125	Active
SR3010-TP	Micro Commercial Co	100	3	850 @ 3 A	1000 @ 100 V	DO-201AD	125	Active
SB12100-AP	Micro Commercial Co	100	12	850 @ 12 A	500 @ 100 V	DO-201AD	150	Active
SB12100-BP	Micro Commercial Co	100	12	850 @ 12 A	500 @ 100 V	DO-201AD	150	Active
SB12100-TP	Micro Commercial Co	100	12	850 @ 12 A	500 @ 100 V	DO-201AD	150	Active

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Rating):

MBR3100RLG (onsemi) is the direct active equivalent to the obsolete MBR3100RL. Both parts share identical electrical specifications: 100 V reverse voltage, 3 A average rectified current, 790 mV forward voltage at 3 A, and 175°C maximum junction temperature. MBR3100RLG is ROHS3 compliant and available in active production status with substantial inventory (50,400 pcs).

Alternative 3 A Rated Substitutes:

SB3H100-E3/73 (Vishay) provides the lowest reverse leakage current (20 µA @ 100 V) among 3 A alternatives, with forward voltage of 800 mV @ 3 A and maximum junction temperature of 175°C, matching the MBR3100RL thermal rating. ROHS3 compliant with 54,986 pcs in stock.

SB3100-T (Diodes Incorporated) maintains 790 mV forward voltage matching the MBR3100RL specification, with 500 µA reverse leakage and 150°C maximum junction temperature. ROHS3 compliant with 1,232 pcs in stock.

SB3100E-G (Comchip Technology) operates at 850 mV forward voltage with 500 µA reverse leakage and 150°C maximum junction temperature. ROHS3 compliant with 13,822 pcs in stock.

SR3010 series (Micro Commercial Co) parts (SR3010-AP, SR3010-BP, SR3010-TP) operate at 850 mV forward voltage with 1 mA reverse leakage and 125°C maximum junction temperature. SR3010-TP is ROHS3 compliant. Operating temperature range is -55°C to 125°C, which is narrower than the MBR3100RL specification.

Higher Current Capacity Substitutes (12 A Rated):

SB12100 series parts (SB12100-AP, SB12100-BP, SB12100-TP) from Micro Commercial Co are rated for 12 A average rectified current with 100 V reverse voltage. Forward voltage is 850 mV @ 12 A with 500 µA reverse leakage and 150°C maximum junction temperature. These parts are electrically compatible for applications where the MBR3100RL is specified but provide increased current margin. All three variants are active with inventory ranging from 637 to 905 pcs.

Compliance Status:

The MBR3100RL is RoHS non-compliant. All recommended active substitutes are ROHS3 compliant, meeting current regulatory requirements for new designs and production.

Frequently Asked Questions (FAQ)

Q: Can MBR3100RLG directly replace MBR3100RL without circuit modification?

A: Yes. MBR3100RLG is the direct active equivalent with identical electrical specifications: 100 V reverse voltage, 3 A average rectified current, 790 mV forward voltage at 3 A, and -65°C to 175°C operating temperature range. Both use through-hole axial packaging. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between 3 A and 12 A rated Schottky diodes in this voltage class?

A: The 12 A rated parts (SB12100 series) are electrically compatible with the MBR3100RL but rated for four times the current capacity. Forward voltage increases from 790 mV to 850 mV at the higher current rating. The 12 A parts are suitable for applications requiring the MBR3100RL specification but with higher current demands. Circuit design must account for the increased forward voltage drop.

Q: Are DO-201AA and DO-201AD packages mechanically interchangeable?

A: Both are through-hole axial packages with similar form factors. DO-201AA and DO-27 are the original MBR3100RL packages. DO-201AD is used by most active substitutes. Mechanical compatibility depends on PCB hole spacing and lead diameter specifications. Verify lead diameter and pitch against PCB design before substitution.

Q: Which substitute has the lowest reverse leakage current?

A: SB3H100-E3/73 (Vishay) exhibits the lowest reverse leakage at 20 µA @ 100 V, compared to 600 µA for the MBR3100RL. This characteristic is beneficial in applications sensitive to leakage current, such as precision rectification circuits or high-impedance applications.

Q: What is the significance of the forward voltage difference between substitutes?

A: Forward voltage varies from 790 mV (MBR3100RL, MBR3100RLG, SB3100-T) to 850 mV (SB3100E-G, SR3010 series, SB12100 series). In rectification applications, higher forward voltage results in greater power dissipation and reduced output voltage. For precision applications, select substitutes with forward voltage closest to the original specification. For general rectification, the 60 mV difference is typically acceptable.

Q: Are all active substitutes RoHS compliant?

A: Yes. All recommended active substitutes are ROHS3 compliant. The original MBR3100RL is RoHS non-compliant. Compliance is mandatory for new designs and production in regulated markets.

Q: What is the operating temperature range difference between substitutes?

A: The MBR3100RL and MBR3100RLG are rated to 175°C maximum junction temperature. SB3H100-E3/73 also reaches 175°C. Most other substitutes (SB3100-T, SB3100E-G, SB12100 series) are rated to 150°C. SR3010 series is rated to 125°C. Select substitutes based on thermal requirements of the application.

Q: Can SR3010 series parts be used in applications requiring -65°C minimum operating temperature?

A: No. SR3010 series parts are rated for -55°C to 125°C operating temperature range, which does not meet the MBR3100RL specification of -65°C to 175°C. Use SB3H100-E3/73 or MBR3100RLG for applications requiring -65°C minimum temperature.

Q: What packaging options are available for the 3 A rated substitutes?

A: MBR3100RLG is available in Cut Tape (CT) packaging. SB3100-T is available in Cut Tape (CT). SB3100E-G is available in Cut Tape (CT). SB3H100-E3/73 is available in Cut Tape (CT). SR3010-AP and SR3010-BP are available in Bulk packaging. SR3010-TP is available in Tape & Reel (TR) packaging. Select packaging based on production volume and assembly requirements.

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