1N5408-TP Equivalent & Substitute Parts

Part Overview

The 1N5408-TP is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. Manufactured by Micro Commercial Co, this part is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Suitable alternatives maintain the core electrical specifications while offering active product status and improved availability.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1	V @ 3 A
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the 1N5408-TP are categorized based on electrical parameter compatibility and product status. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 1000 V minimum
Current - Average Rectified (Io): 3 A
Mounting Type: Through Hole
Package / Case: DO-201AD or equivalent axial configuration
Technology: Standard rectifier diode

Substitution Categories:

Direct Substitutes (1000 V, 3 A, Active Status): Parts that match all critical electrical parameters and are in active production status. These include 1N5408GP-TP, GP30M-E3/54, GP30M-E3/73, 1N5408-E3/54, 1N5408-E3/73, and 1N5408G. These parts are functionally equivalent and suitable for direct replacement in new designs.

Compatible Alternatives (1000 V, 3 A, Not For New Designs): The 1N5408RLG from onsemi meets electrical specifications but carries a "Not For New Designs" status. This part is suitable for legacy system maintenance and repair applications only.

Reduced Voltage Alternatives (800 V, 3 A, Active Status): Parts including 1N5407-B, 1N5407G, and 1N5407G-T operate at 800 V maximum reverse voltage. These are suitable only for applications where the 1000 V rating is not required and where the lower voltage specification meets circuit requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Ir @ Vr [µA]	Package	Product Status	Temp Range [°C]
1N5408-TP	Micro Commercial Co	1000	3	1 @ 3A	5 @ 1000V	DO-201AD	Obsolete	-55 to 150
1N5408GP-TP	Micro Commercial Co	1000	3	1.1 @ 3A	5 @ 1000V	DO-201AD	Active	-55 to 150
1N5408RLG	onsemi	1000	3	1 @ 3A	10 @ 1000V	DO-201AA/DO-27	Not For New Designs	-65 to 150
GP30M-E3/54	Vishay General Semiconductor	1000	3	1.1 @ 3A	5 @ 1000V	DO-201AD	Active	-65 to 175
GP30M-E3/73	Vishay General Semiconductor	1000	3	1.1 @ 3A	5 @ 1000V	DO-201AD	Active	-65 to 175
1N5407-B	Diodes Incorporated	800	3	1 @ 3A	10 @ 800V	DO-201AD	Active	-65 to 150
1N5407G	Taiwan Semiconductor Corporation	800	3	1 @ 3A	5 @ 800V	DO-201AD	Active	-55 to 150
1N5407G-T	Diodes Incorporated	800	3	1.1 @ 3A	5 @ 800V	DO-201AD	Active	-65 to 150
1N5408-E3/54	Vishay General Semiconductor	1000	3	1.2 @ 3A	5 @ 1000V	DO-201AD	Active	-50 to 150
1N5408-E3/73	Vishay General Semiconductor	1000	3	1.2 @ 3A	5 @ 1000V	DO-201AD	Active	-50 to 150
1N5408G	Taiwan Semiconductor Corporation	1000	3	1 @ 3A	5 @ 1000V	DO-201AD	Active	-55 to 150

Engineering Selection Recommendations

For New Designs Requiring 1000 V Rating:

Select from active-status parts that maintain the full 1000 V reverse voltage specification: 1N5408GP-TP, GP30M-E3/54, GP30M-E3/73, 1N5408-E3/54, 1N5408-E3/73, or 1N5408G. All are ROHS3 compliant and REACH unaffected. The Vishay GP30M series (GP30M-E3/54 and GP30M-E3/73) offer extended operating temperature range to 175°C and are designated as SUPERECTIFIER® products with specified reverse recovery time of 5 µs. The Taiwan Semiconductor 1N5408G provides the highest inventory availability at 38,100 pieces.

For Legacy System Maintenance:

The 1N5408RLG from onsemi is suitable for repair and maintenance of existing systems where the part is already in use. This part carries "Not For New Designs" status and should not be selected for new applications.

For Applications Not Requiring Full 1000 V Rating:

If circuit design permits operation at 800 V maximum reverse voltage, the 1N5407 series (1N5407-B, 1N5407G, 1N5407G-T) provides active alternatives. These parts maintain 3 A current rating and DO-201AD packaging. The 1N5407G-T from Diodes Incorporated includes specified reverse recovery time of 2 µs.

Compliance Verification:

All recommended substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original 1N5408-TP. Moisture sensitivity levels vary; parts designated MSL 1 (Unlimited) are suitable for standard handling and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can 1N5408GP-TP directly replace 1N5408-TP in existing designs?

A: Yes. The 1N5408GP-TP maintains identical electrical specifications (1000 V, 3 A, DO-201AD package) and operating temperature range (-55°C to 150°C). The primary difference is active product status versus obsolete status. Forward voltage is slightly higher at 1.1 V versus 1 V, which is within acceptable tolerance for general-purpose rectifier applications.

Q: What is the difference between GP30M-E3/54 and GP30M-E3/73?

A: Both parts are electrically identical with 1000 V, 3 A ratings and DO-201AD packaging. The designation suffix (-E3/54 versus -E3/73) indicates different tape and reel configurations for automated assembly. Selection depends on procurement and assembly equipment compatibility. Both are active products from Vishay with extended temperature range to 175°C.

Q: Can 1N5407G replace 1N5408-TP?

A: Partial compatibility exists. The 1N5407G operates at 800 V maximum reverse voltage compared to 1000 V for the 1N5408-TP. This part is suitable only for applications where the circuit design does not require the full 1000 V rating. Current rating (3 A) and package (DO-201AD) are identical. Verify circuit voltage requirements before substitution.

Q: Why do some substitute parts have higher forward voltage specifications?

A: Forward voltage variation (1 V to 1.2 V @ 3 A) reflects manufacturing process differences between suppliers and product generations. These variations are within standard rectifier diode tolerances and do not affect functionality in general-purpose rectifier applications. Verify forward voltage drop is acceptable for specific circuit power dissipation calculations.

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

A: All recommended direct substitutes use DO-201AD axial through-hole packaging, matching the original 1N5408-TP. The 1N5408RLG uses DO-201AA/DO-27 designation, which is mechanically compatible but represents an older package designation. Physical dimensions and lead spacing remain compatible for through-hole PCB mounting.

Q: What is the significance of "Not For New Designs" status on 1N5408RLG?

A: This designation indicates the part is maintained for legacy system support and repair only. onsemi continues to manufacture and supply this part but does not recommend it for new product development. For new designs, select from parts with "Active" status such as 1N5408G, GP30M-E3/73, or 1N5408-E3/73.

Q: How do I select between multiple active 1000 V alternatives?

A: Selection criteria include operating temperature requirements, inventory availability, and assembly equipment compatibility. For standard applications with -55°C to 150°C requirements, 1N5408G offers highest inventory (38,100 pieces). For extended temperature to 175°C, select GP30M-E3/54 or GP30M-E3/73. For specific tape/reel configurations, verify the suffix designation matches assembly equipment specifications.

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