S310 Schottky Diode Equivalent & Substitute Parts

Part Overview

The onsemi S310 is a Schottky rectifier diode rated for 100 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original part is no longer available or inventory is depleted.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 100 V
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Schottky
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the S310 is determined by strict electrical and mechanical compatibility across the following parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 100 V
Current - Average Rectified (Io): Must equal or exceed 3 A
Package / Case: Must be DO-214AB, SMC (surface mount)
Technology: Must be Schottky
Mounting Type: Must be Surface Mount

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: Acceptable range 790 mV to 850 mV @ 3 A
Current - Reverse Leakage @ Vr: Acceptable range 8 µA to 500 µA @ 100 V
Operating Temperature - Junction: Acceptable range -65°C to 175°C (encompasses S310 range of -55°C to 150°C)
RoHS Status: ROHS3 Compliant preferred for regulatory alignment

Parts are grouped into two categories: Direct Substitutes (matching all primary criteria with active product status) and Parametric Equivalents (matching all primary criteria with potential minor variations in secondary parameters).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Product Status	Package
S310	onsemi	100 V	3 A	850 mV @ 3 A	500 µA @ 100 V	-55°C ~ 150°C	Not For New Designs	DO-214AB, SMC
MBRS3100T3G	onsemi	100 V	3 A	790 mV @ 3 A	50 µA @ 100 V	-65°C ~ 175°C	Active	DO-214AB, SMC
B3100-13-F	Diodes Incorporated	100 V	3 A	790 mV @ 3 A	500 µA @ 100 V	-55°C ~ 125°C	Active	DO-214AB, SMC
B390-13-F	Diodes Incorporated	90 V	3 A	790 mV @ 3 A	500 µA @ 90 V	-55°C ~ 125°C	Active	DO-214AB, SMC
MB310_R1_00001	Panjit International Inc.	100 V	3 A	800 mV @ 3 A	50 µA @ 100 V	-65°C ~ 175°C	Active	DO-214AB, SMC
SK610L-TP	Micro Commercial Co	100 V	6 A	850 mV @ 6 A	1 mA @ 100 V	-55°C ~ 150°C	Active	DO-214AB, SMC
SS3H10-E3/57T	Vishay General Semiconductor - Diodes Division	100 V	3 A	800 mV @ 3 A	20 µA @ 100 V	-65°C ~ 175°C	Active	DO-214AB, SMC
SK310	Diotec Semiconductor	100 V	3 A	850 mV @ 3 A	8 µA @ 100 V	-50°C ~ 150°C	Active	DO-214AB, SMC
SK310-TP	Micro Commercial Co	100 V	3 A	850 mV @ 3 A	500 µA @ 100 V	-55°C ~ 150°C	Active	DO-214AB, SMC
SS310 V7G	Taiwan Semiconductor Corporation	100 V	3 A	850 mV @ 3 A	100 µA @ 100 V	-55°C ~ 150°C	Discontinued at DiGi Electronics	DO-214AB, SMC
SS310C-HF	Comchip Technology	100 V	3 A	850 mV @ 3 A	300 µA @ 100 V	-55°C ~ 150°C	Active	DO-214AB, SMC

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Status, Full Compliance):

MBRS3100T3G (onsemi) - Direct replacement from original manufacturer with improved specifications. Lower forward voltage (790 mV vs. 850 mV) and extended operating temperature range (-65°C to 175°C). ROHS3 compliant.
MB310_R1_00001 (Panjit International Inc.) - Meets all electrical specifications with 100 V / 3 A rating. Extended operating temperature range (-65°C to 175°C). ROHS3 compliant. Lower reverse leakage (50 µA).
SS3H10-E3/57T (Vishay General Semiconductor - Diodes Division) - Meets all electrical specifications with 100 V / 3 A rating. Extended operating temperature range (-65°C to 175°C). Lowest reverse leakage (20 µA). ROHS3 compliant. Highest inventory availability (71,970 pcs).
SK310 (Diotec Semiconductor) - Parametric equivalent with identical voltage and current ratings. Matches forward voltage (850 mV). Active product status. High inventory availability (62,200 pcs).
SK310-TP (Micro Commercial Co) - Parametric equivalent with identical electrical specifications to S310. Tape & Reel packaging. Active product status.

Secondary Substitutes (Active Status, Minor Parameter Variations):

B3100-13-F (Diodes Incorporated) - Meets 100 V / 3 A specifications. Lower forward voltage (790 mV). Operating temperature range -55°C to 125°C (narrower than S310). ROHS3 compliant.
SS310C-HF (Comchip Technology) - Meets 100 V / 3 A specifications. Matches forward voltage (850 mV). Active product status with limited inventory (701 pcs).

Not Recommended for Direct Substitution:

B390-13-F (Diodes Incorporated) - Rated for 90 V maximum reverse voltage, below the 100 V requirement of S310. Acceptable only in applications with maximum operating voltage below 90 V.
SK610L-TP (Micro Commercial Co) - Rated for 6 A average rectified current, exceeding the 3 A specification. Acceptable for applications requiring higher current capacity, but represents oversizing for 3 A circuits.
SS310 V7G (Taiwan Semiconductor Corporation) - Discontinued at DiGi Electronics. Avoid for new procurement despite meeting electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can I use MBRS3100T3G as a direct replacement for S310?

A: Yes. MBRS3100T3G meets all primary substitution criteria: 100 V reverse voltage, 3 A current rating, DO-214AB SMC package, and Schottky technology. It is manufactured by onsemi (original S310 manufacturer) and offers improved specifications including lower forward voltage (790 mV vs. 850 mV) and extended operating temperature range (-65°C to 175°C vs. -55°C to 150°C). ROHS3 compliance is maintained.

Q: What is the difference between SK310 and SK310-TP?

A: Both parts are rated for 100 V / 3 A with identical electrical specifications. The primary difference is packaging: SK310 is supplied in Cut Tape (CT) & Digi-Reel format by Diotec Semiconductor, while SK310-TP is supplied in Tape & Reel (TR) format by Micro Commercial Co. Selection depends on assembly line requirements and packaging preferences.

Q: Why is B390-13-F listed as a substitute if it has only 90 V rating?

A: B390-13-F is listed in the original S310 substitute list but does not meet the primary substitution criterion of 100 V minimum reverse voltage. It is acceptable only in applications where the maximum operating voltage is confirmed to be below 90 V. For circuits requiring the full 100 V rating, B390-13-F is not suitable.

Q: Can I use SK610L-TP instead of S310?

A: SK610L-TP meets the voltage and package requirements (100 V, DO-214AB SMC) but is rated for 6 A average rectified current instead of 3 A. This represents component oversizing. While electrically compatible in circuits designed for 3 A operation, SK610L-TP introduces unnecessary cost and board space considerations. Use only if higher current capacity is required for circuit redesign.

Q: Which substitute has the best availability?

A: SS3H10-E3/57T (Vishay General Semiconductor - Diodes Division) has the highest inventory availability at 71,970 pcs. SK310 (Diotec Semiconductor) is the second option with 62,200 pcs available.

Q: Are all substitutes ROHS3 compliant?

A: Most recommended substitutes are ROHS3 compliant (MBRS3100T3G, B3100-13-F, MB310_R1_00001, SS3H10-E3/57T, SK310-TP, SS310 V7G, SS310C-HF). SK310 (Diotec Semiconductor) has "Not applicable" RoHS status. Verify compliance requirements for your specific application before selection.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current ranges from 8 µA (SK310) to 1 mA (SK610L-TP) across available substitutes. Lower reverse leakage reduces power dissipation and heat generation in standby conditions. For most applications, differences within the 8 µA to 500 µA range are not critical. Select lower leakage options (SS3H10-E3/57T at 20 µA, MB310_R1_00001 at 50 µA, MBRS3100T3G at 50 µA) for power-sensitive or high-temperature applications.

Q: Can I mix different substitute parts in the same circuit board?

A: Yes, all recommended substitutes are electrically compatible and use the same DO-214AB SMC package. However, manufacturing best practices recommend using a single part number per design to simplify procurement, inventory management, and quality control. If multiple substitutes are necessary due to supply constraints, verify that forward voltage and reverse leakage specifications are acceptable across the operating temperature range for your specific circuit.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape (CT) & Digi-Reel packaging is supplied in continuous tape format cut to specific lengths, suitable for manual assembly or small-volume production. Tape & Reel (TR) packaging is supplied on full reels for automated pick-and-place assembly. Selection depends on production volume and assembly equipment. Both formats use identical DO-214AB SMC components.

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