SB1100 Equivalent & Substitute Parts

Part Overview

The SB1100 is a Schottky rectifier diode manufactured by onsemi, rated for 100 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The SB1100 serves applications requiring fast recovery Schottky diode performance with forward voltage characteristics suitable for power conversion and signal rectification circuits.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 100 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-65°C ~ 125°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SB1100 is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 1 A minimum
Technology: Schottky
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, or Axial configuration
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Parameter Variations:

Forward Voltage (Vf): Variations within ±100 mV at rated current are acceptable for functional equivalence
Reverse Leakage Current: Values at or below 500 µA @ 100 V are acceptable
Operating Temperature Range: Extended ranges are acceptable; minimum range must encompass -65°C to 125°C
Product Status: Active parts are preferred over obsolete classifications

Parts are grouped as direct equivalents when all primary criteria are met with minimal parameter deviation. Parts with higher current ratings (1.1 A or greater) are classified as similar alternatives suitable for applications with design margin requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Temp Range	Product Status	Package
SB1100	onsemi	100 V	1 A	850 mV @ 1 A	500 µA @ 100 V	-65°C ~ 125°C	Obsolete	DO-41
MBR1100RLG	onsemi	100 V	1 A	790 mV @ 1 A	500 µA @ 100 V	-65°C ~ 175°C	Active	Axial
MBR1100G	onsemi	100 V	1 A	790 mV @ 1 A	500 µA @ 100 V	-65°C ~ 175°C	Active	Axial
SR1010-TP	Micro Commercial Co	100 V	1 A	850 mV @ 1 A	500 µA @ 100 V	-55°C ~ 125°C	Active	DO-41
SB1100E-G	Comchip Technology	100 V	1 A	850 mV @ 1 A	500 µA @ 100 V	-65°C ~ 150°C	Active	DO-41
11DQ10	SMC Diode Solutions	100 V	1.1 A	960 mV @ 2 A	500 µA @ 100 V	-40°C ~ 150°C	Active	DO-41
1N6761	Microchip Technology	100 V	1 A	690 mV @ 1 A	100 µA @ 100 V	-65°C ~ 150°C	Active	DO-41
1N6761-1	Microchip Technology	100 V	1 A	690 mV @ 1 A	100 µA @ 100 V	-65°C ~ 150°C	Active	DO-41
MBR1100_R2_00001	Panjit International Inc.	100 V	1 A	800 mV @ 1 A	50 µA @ 100 V	-65°C ~ 175°C	Active	DO-41
SB1100-T	Diodes Incorporated	100 V	1 A	800 mV @ 1 A	500 µA @ 100 V	-65°C ~ 125°C	Active	DO-41
SB190-T	Diodes Incorporated	90 V	1 A	800 mV @ 1 A	500 µA @ 90 V	-65°C ~ 125°C	Active	DO-41

Engineering Selection Recommendations

Direct Equivalents (Preferred for SB1100 Replacement):

The following parts meet all primary substitution criteria and are classified as active products:

SB1100-T (Diodes Incorporated): Identical electrical specifications to SB1100 with active product status. Forward voltage 800 mV @ 1 A. Operating temperature range -65°C ~ 125°C matches original specification. ROHS3 compliant. Available in Cut Tape packaging with 11,461 units in stock.
SB1100E-G (Comchip Technology): Meets all electrical requirements with extended operating temperature range to 150°C. Forward voltage 850 mV @ 1 A. ROHS3 compliant. Available in Cut Tape packaging with 5,937 units in stock.
SR1010-TP (Micro Commercial Co): Functionally equivalent with identical forward voltage specification (850 mV @ 1 A). Operating temperature range -55°C ~ 125°C. ROHS3 compliant. Available in Tape & Reel packaging with 1,450 units in stock.
MBR1100_R2_00001 (Panjit International Inc.): Meets all electrical requirements with forward voltage 800 mV @ 1 A and extended temperature range to 175°C. Lower reverse leakage current (50 µA @ 100 V). ROHS3 compliant. Available in Tape & Reel packaging with 773 units in stock.

Alternative Equivalents (Extended Temperature or Packaging Options):

MBR1100RLG (onsemi): Same manufacturer as original part. Forward voltage 790 mV @ 1 A with extended temperature range to 175°C. Axial package configuration. ROHS3 compliant. Available in Cut Tape packaging with 57,700 units in stock.
MBR1100G (onsemi): Same manufacturer as original part. Forward voltage 790 mV @ 1 A with extended temperature range to 175°C. Axial package configuration. ROHS3 compliant. Available in Bulk packaging with 1,290 units in stock.

Similar Parts with Enhanced Current Rating:

11DQ10 (SMC Diode Solutions): Higher current rating (1.1 A) provides design margin. Forward voltage 960 mV @ 2 A. Operating temperature range -40°C ~ 150°C. ROHS3 compliant but REACH affected. Available in Cut Tape packaging with 9,335 units in stock.

Similar Parts with Improved Reverse Leakage Characteristics:

1N6761 (Microchip Technology): Lower reverse leakage current (100 µA @ 100 V) compared to SB1100 specification. Forward voltage 690 mV @ 1 A. Operating temperature range -65°C ~ 150°C. Available in Bulk packaging with 857 units in stock.
1N6761-1 (Microchip Technology): Identical specifications to 1N6761. Available in Bulk packaging with 800 units in stock.

Not Recommended:

SB190-T (Diodes Incorporated): Reverse voltage rating of 90 V is below the 100 V requirement of SB1100. This part is unsuitable for direct substitution in applications requiring 100 V blocking capability.

Frequently Asked Questions (FAQ)

Q: Can I use MBR1100RLG as a direct replacement for SB1100?

A: MBR1100RLG is electrically equivalent to SB1100 with identical voltage and current ratings. The primary difference is package configuration: MBR1100RLG is supplied in Axial format while SB1100 is DO-41. Both are through-hole packages compatible with standard PCB layouts. MBR1100RLG offers extended operating temperature range (-65°C ~ 175°C) and is actively manufactured by onsemi.

Q: What is the difference between SB1100-T and SB1100E-G?

A: Both parts are functionally equivalent to SB1100 with 100 V reverse voltage and 1 A current rating. SB1100-T is manufactured by Diodes Incorporated with operating temperature range -65°C ~ 125°C. SB1100E-G is manufactured by Comchip Technology with extended operating temperature range to 150°C. Selection depends on thermal requirements and preferred supplier.

Q: Why is 11DQ10 listed as a similar part rather than a direct equivalent?

A: The 11DQ10 has a higher current rating (1.1 A) compared to the SB1100 specification (1 A). While this provides design margin, the forward voltage specification differs (960 mV @ 2 A versus 850 mV @ 1 A). The 11DQ10 is suitable for applications where higher current capacity is beneficial, but it is not a direct one-to-one replacement.

Q: Can I substitute SB190-T for SB1100?

A: No. SB190-T has a maximum reverse voltage rating of 90 V, which is below the 100 V requirement of SB1100. This part cannot be used in applications requiring 100 V blocking capability and is not a suitable substitute.

Q: What are the packaging differences among substitute parts?

A: Substitute parts are available in three through-hole package configurations: DO-41 (axial leads), Axial (radial configuration), and bulk or tape & reel formats. DO-41 and Axial packages are mechanically compatible with standard through-hole PCB layouts. Selection of packaging format depends on assembly equipment and procurement requirements. All listed parts maintain the same electrical performance regardless of packaging format.

Q: Are all substitute parts RoHS3 compliant?

A: All recommended substitute parts are ROHS3 compliant except 11DQ10, which is REACH affected. For applications requiring full RoHS3 compliance without REACH considerations, select from SB1100-T, SB1100E-G, SR1010-TP, MBR1100_R2_00001, MBR1100RLG, MBR1100G, 1N6761, or 1N6761-1.

Q: Which substitute part has the lowest forward voltage drop?

A: The 1N6761 and 1N6761-1 (both Microchip Technology) have the lowest forward voltage specification at 690 mV @ 1 A. These parts are suitable for applications where minimizing power dissipation is a design priority.

Q: What is the difference between 1N6761 and 1N6761-1?

A: Both parts have identical electrical specifications and operating characteristics. The difference is in part numbering convention used by Microchip Technology. Both are suitable for SB1100 substitution with equivalent performance.

Q: Can I use parts with extended temperature ranges in place of SB1100?

A: Yes. Parts with extended operating temperature ranges (such as MBR1100RLG at -65°C ~ 175°C) are fully compatible with SB1100 applications. Extended temperature capability provides additional design margin and does not introduce compatibility issues. Selection of extended-range parts is recommended for applications with uncertain thermal environments.

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