DSA17G Equivalent & Substitute Parts

Part Overview

The DSA17G is a general-purpose rectifier diode manufactured by onsemi, rated for 600 V DC reverse voltage and 1.7 A average rectified current in an axial through-hole package. This component is classified as obsolete, indicating it is no longer in active production. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing maintenance and repair operations for legacy systems utilizing this diode.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	1.7 A
Voltage - Forward (Vf) (Max) @ If	1.05 V @ 1.7 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 600 V
Mounting Type	Through Hole
Package / Case	Axial
Operating Temperature - Junction (Max)	150°C
Technology	Standard

Substitute Part Grouping Explanation

Substitute parts for the DSA17G are selected based on the following critical parameters that determine functional compatibility:

Primary Selection Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 600 V
Current - Average Rectified (Io): Must equal or exceed 1.7 A
Mounting Type: Through Hole
Technology: Standard recovery characteristics
Operating Temperature - Junction: Must support 150°C maximum

Secondary Compatibility Factors:

Package / Case: Axial or equivalent through-hole packages (DO-15, DO-204AC, DO-27, DO-201AA)
Voltage - Forward (Vf): Lower forward voltage indicates improved efficiency
Current - Reverse Leakage: Lower leakage indicates superior performance

Substitute parts meeting or exceeding these parameters are electrically and mechanically compatible with the DSA17G in standard rectification applications.

Parameter Comparison

Parameter	DSA17G	1N5406RLG	EGP20J	GPP20J-E3/54	GPP20J-E3/73
Manufacturer	onsemi	onsemi	Fairchild Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	1.7 A	3 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.05 V @ 1.7 A	1 V @ 3 A	1.7 V @ 2 A	1.1 V @ 2 A	1.1 V @ 2 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 600 V	10 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Axial	DO-201AA, DO-27, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial
Operating Temperature - Junction	150°C (Max)	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Product Status	Obsolete	Not For New Designs	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

1N5406RLG (onsemi)

The 1N5406RLG provides higher current capacity (3 A versus 1.7 A) while maintaining identical 600 V reverse voltage rating and standard recovery characteristics. This part is manufactured by the same supplier as the DSA17G. However, the 1N5406RLG is classified as "Not For New Designs," indicating limited future availability. This substitute is suitable for direct replacement in existing applications where the higher current rating provides design margin.

EGP20J (Fairchild Semiconductor)

The EGP20J is an active product offering 2 A current capacity with 600 V reverse voltage rating. This part features fast recovery characteristics (≤500 ns) compared to the standard recovery of the DSA17G, resulting in lower reverse recovery losses. The EGP20J is available in DO-15 package format. As an active product, this substitute provides superior long-term supply chain availability.

GPP20J-E3/54 and GPP20J-E3/73 (Vishay General Semiconductor)

Both variants provide identical electrical specifications: 2 A current capacity, 600 V reverse voltage, and standard recovery characteristics. These parts are manufactured by Vishay and are classified as active products. Both variants are ROHS3 compliant and offer superior reverse leakage characteristics (5 µA versus 10 µA). The primary difference between these variants is packaging configuration (Cut Tape) and inventory levels. Both are suitable for direct replacement applications.

Selection Basis:

All substitute parts meet or exceed the critical electrical parameters of the DSA17G (600 V reverse voltage, ≥1.7 A current capacity, through-hole mounting). Selection among substitutes should prioritize active product status for supply chain continuity and compliance certifications (ROHS3) for regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the 1N5406RLG directly replace the DSA17G?

A: Yes. The 1N5406RLG meets all critical electrical parameters: 600 V reverse voltage, 3 A current capacity (exceeds 1.7 A requirement), standard recovery speed, and through-hole axial mounting. The higher current rating provides design margin. However, verify package dimensions for mechanical fit, as the 1N5406RLG is available in multiple package formats (DO-201AA, DO-27, Axial).

Q: What is the difference between the GPP20J-E3/54 and GPP20J-E3/73?

A: Both parts are electrically identical with 2 A current capacity, 600 V reverse voltage, and standard recovery characteristics. The designation difference reflects packaging configuration and supplier tape specifications. Both are active products suitable for replacement applications.

Q: Why does the EGP20J have different forward voltage characteristics?

A: The EGP20J is specified at 1.7 V @ 2 A, compared to the DSA17G at 1.05 V @ 1.7 A. These measurements are taken at different current levels. The EGP20J features fast recovery characteristics (≤500 ns), which may result in different forward voltage behavior compared to the standard recovery DSA17G.

Q: Are all substitute parts through-hole mounted?

A: Yes. All substitute parts listed are through-hole mounted components. The DSA17G uses axial packaging, while substitutes are available in axial, DO-15, DO-204AC, DO-27, and DO-201AA formats. Verify mechanical compatibility with your PCB layout before selection.

Q: Which substitute offers the best long-term availability?

A: The EGP20J, GPP20J-E3/54, and GPP20J-E3/73 are classified as active products, indicating ongoing production and superior supply chain availability compared to the obsolete DSA17G or the "Not For New Designs" 1N5406RLG.

Q: Do all substitutes meet the 150°C maximum junction temperature requirement?

A: Yes. All substitute parts support operating temperatures up to 150°C maximum junction temperature, meeting the DSA17G specification. The 1N5406RLG, EGP20J, GPP20J-E3/54, and GPP20J-E3/73 all specify 150°C as the maximum operating temperature.

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

A: The DSA17G specifies 10 µA reverse leakage at 600 V, while EGP20J and both GPP20J variants specify 5 µA. Lower reverse leakage indicates reduced standby current and improved efficiency in high-impedance circuits. The 1N5406RLG matches the DSA17G at 10 µA.

Q: Are ROHS3 compliance certifications important for substitution?

A: ROHS3 compliance indicates conformance to Restriction of Hazardous Substances regulations. The GPP20J-E3/54, GPP20J-E3/73, and 1N5406RLG are ROHS3 compliant. If your application or region requires ROHS3 compliance, select from these certified alternatives.

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