DST40100C Equivalent & Substitute Parts

Part Overview

The DST40100C is a Schottky diode array manufactured by Littelfuse Inc., configured as a 1 Pair Common Cathode design rated for 100 V DC reverse voltage and 20 A average rectified current per diode. The device is packaged in TO-220-3 through-hole configuration and is currently in Active product status with 707 units in stock.

Substitute parts are necessary when the DST40100C becomes unavailable, when alternative manufacturers are required for supply chain diversification, or when design specifications permit operation at lower current ratings while maintaining voltage and package compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	DST40100C
Manufacturer	Littelfuse Inc.
Category	Diodes, Rectifiers
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io) (per Diode)	20 A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 100 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-220-3
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the DST40100C is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Voltage - DC Reverse (Vr) (Max): Must equal 100 V
Diode Configuration: Must be 1 Pair Common Cathode
Technology: Must be Schottky
Mounting Type: Must be Through Hole
Package / Case: Must be TO-220-3

Current Rating Considerations: Substitute parts are grouped by average rectified current (Io) per diode. The DST40100C operates at 20 A. Substitutes with lower current ratings (5 A, 8 A, 10 A, 15 A) are electrically compatible for applications requiring reduced current capacity. Substitutes with equal or higher current ratings provide direct replacement capability.

Secondary Parameters: Forward voltage (Vf), reverse leakage current, and operating temperature range vary among substitutes but do not prevent substitution when primary parameters align. These variations affect performance characteristics but not functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max)	Vf Test Condition	Reverse Leakage @ Vr	Tj (Operating)	Product Status
DST40100C	Littelfuse Inc.	100 V	20 A	750 mV	@ 20 A	1 mA @ 100 V	-55°C ~ 150°C	Active
FYP1010DNTU	onsemi	100 V	10 A	950 mV	@ 10 A	1 mA @ 100 V	-65°C ~ 150°C	Obsolete
MBR10100CT-BP	Micro Commercial Co	100 V	10 A	850 mV	@ 5 A	200 µA @ 100 V	-55°C ~ 150°C	Active
MBR10100CT-G1	Diodes Incorporated	100 V	5 A	840 mV	@ 5 A	50 µA @ 100 V	-55°C ~ 150°C	Active
MBR16100CTG	onsemi	100 V	8 A	740 mV	@ 8 A	100 µA @ 100 V	-65°C ~ 175°C	Obsolete
MBR20100CT-BP	Micro Commercial Co	100 V	10 A	950 mV	@ 20 A	150 µA @ 100 V	-55°C ~ 150°C	Active
MBR20100CT-G1	Diodes Incorporated	100 V	10 A	840 mV	@ 10 A	50 µA @ 100 V	-55°C ~ 175°C	Active
MBR30100CT-G1	Diodes Incorporated	100 V	15 A	850 mV	@ 15 A	100 µA @ 100 V	-55°C ~ 150°C	Active
MBR30H100CTG	onsemi	100 V	15 A	800 mV	@ 15 A	4.5 µA @ 100 V	-55°C ~ 175°C	Active
MBR41H100CTG	onsemi	100 V	20 A	800 mV	@ 20 A	10 µA @ 100 V	-55°C ~ 175°C	Active
MBR60H100CTG	onsemi	100 V	30 A	840 mV	@ 30 A	10 µA @ 100 V	-55°C ~ 175°C	Active

Engineering Selection Recommendations

Direct Replacement (20 A Rating): MBR41H100CTG (onsemi) provides direct current rating equivalence to the DST40100C. Both devices are rated for 20 A average rectified current at 100 V reverse voltage. MBR41H100CTG is Active status with extended operating temperature range to 175°C and lower reverse leakage current (10 µA vs. 1 mA).

Active Status Substitutes (Lower Current Ratings): For applications permitting reduced current capacity, the following Active status parts are available:

MBR20100CT-G1 (Diodes Incorporated): 10 A rating, AEC-Q101 qualified, -55°C ~ 175°C operating range
MBR20100CT-BP (Micro Commercial Co): 10 A rating, -55°C ~ 150°C operating range
MBR30100CT-G1 (Diodes Incorporated): 15 A rating, -55°C ~ 150°C operating range
MBR30H100CTG (onsemi): 15 A rating, -55°C ~ 175°C operating range

Obsolete Status Substitutes: FYP1010DNTU (onsemi) and MBR16100CTG (onsemi) are classified as Obsolete. These parts are not recommended for new designs but may be used in legacy system maintenance where existing inventory exists.

Compliance Considerations: All listed substitutes maintain ROHS3 compliance and REACH Unaffected status. MBR20100CT-G1 and MBR10100CT-G1 carry AEC-Q101 automotive qualification, suitable for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can MBR41H100CTG replace DST40100C in all applications? A: MBR41H100CTG is electrically compatible as a direct replacement. Both devices share identical 100 V reverse voltage rating, 20 A current rating, 1 Pair Common Cathode configuration, and TO-220-3 package. Differences in forward voltage (800 mV vs. 750 mV) and reverse leakage current (10 µA vs. 1 mA) are within acceptable substitution parameters for most applications.

Q: Are lower current-rated substitutes acceptable? A: Lower current-rated substitutes (5 A, 8 A, 10 A, 15 A) are electrically compatible when circuit design permits operation below the DST40100C's 20 A rating. The 100 V voltage rating and Schottky technology remain constant. Circuit thermal and current requirements must be verified before selection.

Q: What is the significance of the TO-220-3 package requirement? A: The TO-220-3 package is a three-lead through-hole configuration with specific pin spacing and thermal characteristics. All listed substitutes maintain this package specification, ensuring mechanical and thermal compatibility with existing PCB layouts and heat sinking arrangements.

Q: Why are some substitutes listed as Obsolete? A: Obsolete status indicates the manufacturer has discontinued production. FYP1010DNTU and MBR16100CTG are no longer actively manufactured. These parts should not be selected for new designs but may be available from inventory channels for legacy system support.

Q: How do forward voltage differences affect substitution? A: Forward voltage variations (740 mV to 950 mV across the substitute list) represent normal manufacturing variation within Schottky diode technology. These differences affect power dissipation and thermal performance but do not prevent functional substitution. Circuit design must accommodate the specified forward voltage of the selected substitute.

Q: What is the importance of AEC-Q101 qualification? A: AEC-Q101 qualification indicates the device meets automotive industry reliability standards. MBR20100CT-G1 and MBR10100CT-G1 carry this qualification, making them suitable for automotive applications where such certification is required.

Q: Can reverse leakage current differences impact circuit performance? A: Reverse leakage current varies from 4.5 µA to 1 mA across the substitute list. Higher leakage increases standby power consumption and heat generation. For low-power or precision applications, substitutes with lower leakage current (MBR30H100CTG at 4.5 µA) may be preferred.

Q: Is operating temperature range a critical substitution parameter? A: Operating temperature range affects device reliability in thermal extremes. The DST40100C operates -55°C ~ 150°C. Substitutes with extended ranges (-55°C ~ 175°C) provide additional thermal margin. Selection depends on application environment requirements.

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