DST5100S-A Equivalent & Substitute Parts

Part Overview

The DST5100S-A is a Schottky diode manufactured by Littelfuse Inc., rated for 100 V DC reverse voltage and 5 A average rectified current in a surface mount TO-277B package. This component is classified as Active product status and carries automotive-grade qualification (AEC-Q101) with ROHS3 compliance. Equivalent and substitute parts are identified based on matching or exceeding electrical performance parameters while maintaining compatible package configurations and thermal operating ranges. Alternative components become necessary when primary part availability is limited, when higher current ratings are required for design margin, or when alternative supplier options are preferred for supply chain resilience.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	5	A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 5 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	120	µA @ 100 V
Operating Temperature - Junction	-55 to 150	°C
Package / Case	TO-277, 3-PowerDFN	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the DST5100S-A is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Package / Case: TO-277, 3-PowerDFN (surface mount compatible)
Mounting Type: Surface Mount
Technology: Schottky diode
Operating Temperature - Junction: -55°C minimum to 150°C maximum

Allowable Variation Criteria:

Current - Average Rectified (Io): Equal to or greater than 5 A
Voltage - Forward (Vf) (Max): Equal to or less than 750 mV at rated current
Current - Reverse Leakage @ Vr: Equal to or less than 120 µA @ 100 V
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications) and Manufacturer Recommended Alternatives (higher current ratings or alternative suppliers with compatible electrical performance). All substitute parts maintain the same 100 V reverse voltage rating, surface mount TO-277 package family, and fast recovery Schottky technology. Parts with higher current ratings (8 A, 10 A, 12 A, 15 A, 20 A) are suitable substitutes when design margins or application requirements exceed the 5 A base specification.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [mV]	Ir @ Vr [µA]	Package	Product Status	Grade	Qualification
DST5100S-A	Littelfuse Inc.	100	5	750 @ 5A	120 @ 100V	TO-277B	Active	Automotive	AEC-Q101
DST5100S	Littelfuse Inc.	100	5	750 @ 5A	120 @ 100V	TO-277B	Active	Automotive	AEC-Q101
FSV8100V	onsemi	100	8	670 @ 8A	50 @ 100V	TO-277-3	Not For New Designs	—	—
FSV10100V	onsemi	100	10	670 @ 10A	60 @ 100V	TO-277-3	Not For New Designs	—	—
FSV12100V	onsemi	100	12	670 @ 12A	100 @ 100V	TO-277-3	Not For New Designs	—	—
FSV15100V	onsemi	100	15	660 @ 15A	80 @ 100V	TO-277-3	Not For New Designs	—	—
FSV20100V	onsemi	100	20	660 @ 20A	80 @ 100V	TO-277-3	Not For New Designs	—	—
MBR12U100L-TP	Micro Commercial Co	100	12	600 @ 12A	500 @ 100V	TO-277-3	Active	—	—
SS8PH10HM3_A/H	Vishay General Semiconductor - Diodes Division	100	8	900 @ 8A	2 @ 100V	TO-277A	Active	Automotive	AEC-Q101
V12PM10HM3/H	Vishay General Semiconductor - Diodes Division	100	12	750 @ 12A	200 @ 100V	TO-277A	Active	Automotive	AEC-Q101

Engineering Selection Recommendations

Primary Equivalent (Identical Specifications): The DST5100S (without the "-A" suffix) from Littelfuse Inc. is the direct parametric equivalent to DST5100S-A, offering identical electrical performance with higher inventory availability (5815 pcs vs. 678 pcs). Both parts carry Active product status and AEC-Q101 automotive qualification.

Automotive-Grade Alternatives (Active Status): For applications requiring automotive qualification and active product status, the following parts are suitable:

V12PM10HM3/H (Vishay): 12 A rated, TO-277A package, AEC-Q101 qualified, Active status. Forward voltage matches the main part at 750 mV @ 12 A. Operating temperature range -40°C to 150°C.
SS8PH10HM3_A/H (Vishay): 8 A rated, TO-277A package, AEC-Q101 qualified, Active status. Operating temperature range -55°C to 175°C.
MBR12U100L-TP (Micro Commercial Co): 12 A rated, TO-277-3 package, Active status. Forward voltage 600 mV @ 12 A provides improved performance margin.

Higher Current Capacity Alternatives (onsemi FSV Series): The onsemi FSV series (FSV8100V, FSV10100V, FSV12100V, FSV15100V, FSV20100V) provides higher current ratings with improved forward voltage characteristics (660–670 mV). These parts carry "Not For New Designs" status and are suitable for existing design support or applications where higher current margins are required. All maintain 100 V reverse voltage rating and TO-277-3 package compatibility.

Package Compatibility Note: The main part uses TO-277B package. Substitute parts use TO-277-3 or TO-277A variants. These are compatible within the TO-277 family for surface mount applications with identical pinout and thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can I substitute DST5100S-A with DST5100S? A: Yes. DST5100S is a direct parametric equivalent with identical electrical specifications (100 V, 5 A, 750 mV forward voltage, 120 µA reverse leakage). Both are Littelfuse products with AEC-Q101 qualification and Active status. The primary difference is inventory availability.

Q: What is the difference between TO-277B and TO-277-3 packages? A: Both are surface mount TO-277 family packages with identical pinout and thermal performance. TO-277B and TO-277-3 are compatible variants used by different manufacturers. Mechanical and electrical compatibility is maintained across the TO-277 family.

Q: Can I use a higher current rated part like FSV10100V (10 A) instead of DST5100S-A (5 A)? A: Yes, from an electrical compatibility standpoint. The FSV10100V maintains the same 100 V reverse voltage rating and fast recovery Schottky technology. However, FSV10100V carries "Not For New Designs" status. For new designs, use active status alternatives such as V12PM10HM3/H or MBR12U100L-TP.

Q: Why do some substitute parts have lower forward voltage (Vf)? A: Forward voltage variation is a normal characteristic of Schottky diodes from different manufacturers and process technologies. Lower forward voltage (e.g., 660 mV vs. 750 mV) indicates improved efficiency and reduced power dissipation. All listed substitutes meet or exceed the 750 mV maximum specification of the main part.

Q: Are all substitute parts automotive qualified? A: No. Only DST5100S, V12PM10HM3/H, and SS8PH10HM3_A/H carry AEC-Q101 automotive qualification. The onsemi FSV series and MBR12U100L-TP do not list automotive qualification. For automotive applications, use only AEC-Q101 qualified parts.

Q: What is the operating temperature range difference between substitutes? A: The main part and most substitutes operate from -55°C to 150°C. SS8PH10HM3_A/H extends to 175°C. V12PM10HM3/H has a minimum of -40°C (vs. -55°C). Verify application requirements before selecting parts with different temperature ranges.

Q: Can I use MBR12U100L-TP as a direct replacement? A: MBR12U100L-TP is electrically compatible (100 V, 12 A, TO-277-3 package, fast recovery Schottky). However, reverse leakage current is significantly higher (500 µA vs. 120 µA @ 100 V). This may impact applications sensitive to leakage current. Verify application requirements before substitution.

Q: What does "Not For New Designs" status mean for onsemi FSV parts? A: "Not For New Designs" indicates the manufacturer is discontinuing or has discontinued the product line. These parts remain available for existing design support but should not be selected for new product development. Use active status alternatives for new designs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message