DSK10B Equivalent & Substitute Parts

Part Overview

The DSK10B is a general-purpose rectifier diode manufactured by onsemi, rated for 100 V DC reverse voltage and 1 A average rectified current in an axial through-hole package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure uninterrupted supply for applications requiring this diode's electrical and mechanical specifications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 100 V
Mounting Type	Through Hole
Package / Case	Axial
Operating Temperature - Junction (Max)	150°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DSK10B is determined by matching the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Through Hole
Package / Case: Axial or compatible axial variants (DO-204AL, DO-41, DO-204AC, MPG06)

Recovery Speed Consideration: The DSK10B operates at Standard Recovery (>500ns). Substitute parts may operate at Standard Recovery or Fast Recovery (≤500ns) speeds. Fast Recovery variants provide improved performance characteristics and are electrically compatible for this application.

Temperature and Compliance: All substitute parts listed maintain operating temperature ranges compatible with or exceeding the DSK10B maximum junction temperature of 150°C. Active product status and RoHS3 compliance are preferred for new designs.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Package	Product Status	Tj (Max)
DSK10B	onsemi	100 V	1 A	1.1 V @ 1 A	Standard >500ns	Axial	Obsolete	150°C
1N4002G	Taiwan Semiconductor Corporation	100 V	1 A	1 V @ 1 A	Standard >500ns	DO-204AL (DO-41)	Active	150°C
EGP10B	Fairchild Semiconductor	100 V	1 A	950 mV @ 1 A	Fast ≤500ns	DO-204AL (DO-41)	Active	150°C
UF4002	Fairchild Semiconductor	100 V	1 A	1 V @ 1 A	Fast ≤500ns	DO-204AL (DO-41)	Active	175°C
1N4002-E3/54	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard >500ns	DO-204AL (DO-41)	Active	150°C
1N4934-E3/54	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.2 V @ 1 A	Fast ≤500ns	DO-204AL (DO-41)	Active	150°C
1N4934-T	Diodes Incorporated	100 V	1 A	1.2 V @ 1 A	Fast ≤500ns	DO-204AL (DO-41)	Active	150°C
1N4934GPE-E3/54	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.2 V @ 1 A	Fast ≤500ns	DO-204AL (DO-41)	Active	175°C
EGP10B-E3/54	Vishay General Semiconductor - Diodes Division	100 V	1 A	950 mV @ 1 A	Fast ≤500ns	DO-204AL (DO-41)	Active	150°C
MPG06B-E3/54	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.1 V @ 1 A	Standard >500ns	MPG06	Active	150°C
RGP10B-E3/54	Vishay General Semiconductor - Diodes Division	100 V	1 A	1.3 V @ 1 A	Fast ≤500ns	DO-204AL (DO-41)	Active	175°C

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

1N4002-E3/54 and 1N4002G are direct electrical equivalents to the DSK10B, matching the standard recovery speed characteristic and forward voltage specification. Both parts are active products with RoHS3 compliance, making them suitable for new designs and long-term availability.

Secondary Substitutes (Enhanced Performance):

EGP10B-E3/54, 1N4934-E3/54, 1N4934-T, and 1N4934GPE-E3/54 offer fast recovery characteristics (≤500ns) compared to the DSK10B standard recovery (>500ns). These parts maintain the 100 V / 1 A rating and are active products. Fast recovery variants provide reduced reverse recovery time, resulting in lower switching losses and improved efficiency in rectification circuits. All listed fast recovery parts are RoHS3 compliant.

Package Variants:

MPG06B-E3/54 provides an alternative axial package (MPG06) while maintaining standard recovery speed and electrical ratings identical to the DSK10B. This part is suitable for applications where the MPG06 package form factor is acceptable.

Temperature-Enhanced Options:

UF4002, 1N4934GPE-E3/54, and RGP10B-E3/54 support maximum junction temperatures of 175°C, exceeding the DSK10B specification of 150°C. These parts are suitable for applications requiring extended thermal performance margins.

All substitute parts listed are active products with current manufacturing status and full RoHS3 compliance, ensuring long-term supply availability and regulatory compliance for modern applications.

Frequently Asked Questions (FAQ)

Q: Can I use a fast recovery diode as a substitute for the DSK10B standard recovery diode?

A: Yes. Fast recovery diodes (≤500ns) are electrically compatible with standard recovery applications (>500ns). The faster recovery characteristic provides improved performance with no adverse effects on circuit operation. Fast recovery variants reduce reverse recovery time and switching losses, making them suitable direct replacements.

Q: What is the difference between DO-204AL, DO-41, and DO-204AC packages?

A: DO-204AL and DO-41 are equivalent designations for the same axial through-hole package. DO-204AC is a variant of the same package family. All three designations refer to compatible axial diode packages suitable for the DSK10B application. Physical dimensions and mounting characteristics are equivalent across these designations.

Q: Are all listed substitute parts RoHS3 compliant?

A: All active substitute parts listed (1N4002G, EGP10B, UF4002, 1N4002-E3/54, 1N4934-E3/54, 1N4934-T, 1N4934GPE-E3/54, EGP10B-E3/54, MPG06B-E3/54, and RGP10B-E3/54) are RoHS3 compliant. The original DSK10B is classified as REACH Unaffected, and all substitutes maintain equivalent or superior compliance status.

Q: What is the significance of forward voltage (Vf) differences among substitute parts?

A: Forward voltage differences (ranging from 950 mV to 1.3 V @ 1 A) reflect variations in semiconductor material and manufacturing processes. All listed parts meet the 100 V / 1 A specification. Forward voltage variations of this magnitude do not affect circuit compatibility in standard rectification applications. Selection should be based on specific circuit requirements if forward voltage drop is a critical design parameter.

Q: Can I substitute the DSK10B with a part rated for higher voltage or current?

A: Yes. Parts rated for higher voltage (>100 V) or higher current (>1 A) are electrically compatible and provide additional design margin. However, the listed substitutes all match the 100 V / 1 A rating of the DSK10B, ensuring direct functional equivalence without over-specification.

Q: What does "SUPERECTIFIER®" designation indicate?

A: SUPERECTIFIER® is a Vishay trademark indicating enhanced performance rectifier diodes with optimized recovery characteristics. Parts bearing this designation (1N4934GPE-E3/54, EGP10B-E3/54, RGP10B-E3/54) offer improved switching performance compared to standard rectifiers while maintaining full electrical compatibility with the DSK10B specification.

Q: Are there any thermal considerations when selecting a substitute?

A: The DSK10B operates to a maximum junction temperature of 150°C. All listed substitutes support this temperature or higher. UF4002, 1N4934GPE-E3/54, and RGP10B-E3/54 support 175°C maximum junction temperature, providing additional thermal margin for high-temperature applications. Standard operating conditions determine actual junction temperature; part selection should account for circuit dissipation and ambient temperature requirements.

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

A: Cut Tape and Tape & Reel are supply formats for through-hole components. Cut Tape provides individual component strips suitable for manual assembly or small-volume production. Tape & Reel provides continuous tape on reels for automated assembly equipment. Both formats contain identical components; selection depends on assembly process requirements and volume.

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