DGSK20-025AS Equivalent & Substitute Parts

Part Overview

The DGSK20-025AS is a Schottky diode array manufactured by IXYS, configured as a 1 Pair Common Cathode design in a TO-263-3 (D2PAK) surface mount package. This component is rated for 250 V DC reverse voltage with 12 A average rectified current per diode and features fast recovery characteristics. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	DGSK20-025AS
Manufacturer	IXYS
Category	Diodes, Rectifiers
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	250 V
Current - Average Rectified (Io) (per Diode)	12 A
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	1.3 mA @ 250 V
Operating Temperature - Junction	-55°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DGSK20-025AS is determined by the following critical parameters:

Primary Compatibility Criteria:

Diode Configuration: 1 Pair Common Cathode (mandatory match)
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB (mandatory match)
Mounting Type: Surface Mount (mandatory match)

Electrical Performance Criteria:

Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed 250 V
Current - Average Rectified (Io) (per Diode): Substitute must equal or exceed 12 A
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io) (mandatory match)

Substitute parts are grouped into two categories based on electrical performance:

Category A - Full Electrical Equivalents (Vr ≥ 250 V, Io ≥ 12 A):

LQA20B300C (300 V, 10 A) - Exceeds voltage rating; current rating is lower

Category B - Reduced Voltage Equivalents (Vr = 200 V, Io ≥ 10 A):

MBRB20200CT (200 V, 10 A)
MBRB20200CTG (200 V, 10 A)
MBRB20200CTT4G (200 V, 10 A)
SBRB20200CTT4G (200 V, 10 A)
STPS20200CG-TR (200 V, 10 A)

Category C - Reduced Current Equivalents (Vr = 200 V, Io = 5 A):

SBR10U200CTB (200 V, 5 A)

Parameter Comparison

Part Number	Manufacturer	Technology	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Product Status
DGSK20-025AS	IXYS	Schottky	250 V	12 A	1.5 V @ 5 A	1.3 mA @ 250 V	-55°C ~ 175°C	Obsolete
LQA20B300C	Power Integrations	Standard	300 V	10 A	1.9 V @ 10 A	25 µA @ 300 V	150°C (Max)	Active
MBRB20200CT	Diodes Incorporated	Schottky	200 V	10 A	890 mV @ 10 A	100 µA @ 200 V	-55°C ~ 175°C	Active
MBRB20200CTG	onsemi	Schottky	200 V	10 A	900 mV @ 10 A	1 mA @ 200 V	-65°C ~ 150°C	Obsolete
MBRB20200CTT4G	onsemi	Schottky	200 V	10 A	900 mV @ 10 A	1 mA @ 200 V	-65°C ~ 150°C	Active
SBR10U200CTB	Diodes Incorporated	Super Barrier	200 V	5 A	820 mV @ 5 A	200 µA @ 200 V	-65°C ~ 175°C	Obsolete
SBRB20200CTT4G	onsemi	Schottky	200 V	10 A	900 mV @ 10 A	1 mA @ 200 V	-65°C ~ 150°C	Active
STPS20200CG-TR	STMicroelectronics	Schottky	200 V	10 A	860 mV @ 10 A	15 µA @ 200 V	-40°C ~ 175°C	Active

Engineering Selection Recommendations

For Direct Replacement (Full Electrical Equivalence):

LQA20B300C is the only substitute that meets or exceeds the original 250 V reverse voltage specification. However, this part operates at 10 A per diode, which is lower than the original 12 A rating. This part is currently active and available. The LQA20B300C uses standard diode technology rather than Schottky technology, resulting in higher forward voltage (1.9 V @ 10 A versus 1.5 V @ 5 A). The maximum junction temperature is limited to 150°C compared to the original 175°C.

For Reduced Voltage Applications (200 V Reverse Voltage):

The following parts are suitable for applications where the 250 V reverse voltage specification can be reduced to 200 V:

MBRB20200CTT4G (onsemi) - Active product status, Schottky technology, 10 A rating, RoHS3 compliant, MSL 1
SBRB20200CTT4G (onsemi) - Active product status, Schottky technology, 10 A rating, RoHS3 compliant, MSL 1
STPS20200CG-TR (STMicroelectronics) - Active product status, Schottky technology, 10 A rating, RoHS3 compliant, MSL 1
MBRB20200CT (Diodes Incorporated) - Active product status, Schottky technology, 10 A rating, AEC-Q101 qualified, RoHS3 compliant

MBRB20200CTT4G and SBRB20200CTT4G maintain the full operating temperature range of -65°C to 150°C. STPS20200CG-TR has a reduced lower operating temperature limit of -40°C. All three parts feature Schottky technology consistent with the original design.

For Reduced Current Applications (200 V, 5 A):

SBR10U200CTB is available for applications requiring only 5 A per diode. This part is obsolete and uses Super Barrier technology. It maintains the full operating temperature range of -65°C to 175°C.

Compliance and Availability:

All active substitute parts are RoHS3 compliant and REACH unaffected. MBRB20200CT carries AEC-Q101 automotive qualification. Current inventory levels are highest for MBRB20200CTT4G (32,340 pcs), MBRB20200CTG (23,146 pcs), and SBRB20200CTT4G (20,100 pcs).

Frequently Asked Questions (FAQ)

Q: Can the LQA20B300C directly replace the DGSK20-025AS?

A: The LQA20B300C is electrically compatible in terms of package, configuration, and fast recovery speed. However, it operates at 10 A per diode versus the original 12 A specification, and uses standard diode technology instead of Schottky. The maximum junction temperature is 150°C versus 175°C for the original part. Selection depends on whether the application can operate within these reduced specifications.

Q: What is the primary limitation of the 200 V substitute parts?

A: The primary limitation is the reduced reverse voltage rating of 200 V compared to the original 250 V specification. These parts are suitable only for applications where the circuit operates below 200 V. All other electrical and mechanical parameters are compatible.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the TO-263-3 (D2PAK) surface mount package with 2 leads plus tab, maintaining identical PCB footprint and mounting compatibility with the original DGSK20-025AS.

Q: Which substitute parts are currently in active production?

A: The following parts have active product status: LQA20B300C, MBRB20200CT, MBRB20200CTT4G, SBRB20200CTT4G, and STPS20200CG-TR. The parts MBRB20200CTG and SBR10U200CTB are obsolete.

Q: What is the difference between Schottky and Standard diode technology in these substitutes?

A: Schottky diodes (used in most substitutes) feature lower forward voltage drop and faster switching characteristics. Standard diodes (LQA20B300C) have higher forward voltage but may offer other performance characteristics. The original DGSK20-025AS uses Schottky technology.

Q: Do all substitute parts maintain the same operating temperature range?

A: No. The original DGSK20-025AS operates from -55°C to 175°C. Most 200 V substitutes operate from -65°C to 150°C, providing lower minimum temperature but reduced maximum temperature. STPS20200CG-TR has a minimum of -40°C. LQA20B300C is limited to 150°C maximum.

Q: Are there packaging format differences among the substitute parts?

A: Yes. While all parts use the same TO-263-3 D2PAK package, they are available in different packaging formats: Cut Tape & Digi-Reel, Tube, or Tape & Reel. Packaging format affects procurement and handling but does not affect electrical or mechanical compatibility.

Q: Which substitute offers the best forward voltage characteristics?

A: STPS20200CG-TR offers the lowest forward voltage at 860 mV @ 10 A, followed by MBRB20200CT at 890 mV @ 10 A. Both are lower than the original part's 1.5 V @ 5 A specification, though measured at different current levels.

Q: Is the DGSK20-025AS configuration (1 Pair Common Cathode) maintained in all substitutes?

A: Yes. All substitute parts maintain the 1 Pair Common Cathode configuration, ensuring identical pinout and circuit functionality.

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