1N5408-AP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The 1N5408-AP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 1000 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 1N5408-AP remains functionally available through active substitute variants and cross-compatible alternatives from other manufacturers that meet identical electrical and mechanical specifications.

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	V @ A
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1N5408-AP is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole
Technology: Standard
Current - Reverse Leakage @ Vr: 5 µA @ 1000 V

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Variations within standard rectifier diode tolerances
Capacitance @ Vr, F: Minor variations acceptable
Operating Temperature - Junction: Range must encompass or equal the original specification

All substitute parts listed maintain identical voltage and current ratings, package configuration, and mounting methodology. Substitutes are grouped by product status and manufacturer to facilitate procurement decisions.

Parameter Comparison

Parameter	1N5408-AP (Main)	1N5408GP-AP (Direct)	GI510-E3/54 (Similar)
Manufacturer	Micro Commercial Co	Micro Commercial Co	Vishay General Semiconductor - Diodes Division
Product Status	Obsolete	Active	Active
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A	1.1 V @ 3 A	1.1 V @ 9.4 A
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	5 µA @ 1000 V	5 µA @ 1000 V
Capacitance @ Vr, F	40 pF @ 4V, 1MHz	40 pF @ 4V, 1MHz	28 pF @ 4V, 1MHz
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial
Mounting Type	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-50 to 150 °C
Technology	Standard	Standard	Standard
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	—	Tape & Box (TB)	Cut Tape (CT)
Inventory Status	709 Pcs New Original In Stock	920 Pcs New Original In Stock	6185 Pcs New Original In Stock

Engineering Selection Recommendations

1N5408GP-AP (Direct Substitute - Recommended for Primary Selection)

The 1N5408GP-AP is the direct active equivalent manufactured by Micro Commercial Co. This part maintains identical electrical specifications to the 1N5408-AP with the exception of forward voltage (1.1 V versus 1 V at 3 A), which falls within standard rectifier diode tolerance ranges. The 1N5408GP-AP carries active product status, ensuring long-term availability and supply chain continuity. Both parts are ROHS3 compliant and share identical operating temperature ranges. The primary distinction is packaging format: 1N5408GP-AP is supplied in Tape & Box configuration versus the original part's unspecified packaging. This substitute is suitable for direct replacement in all applications where the 1N5408-AP was originally specified.

GI510-E3/54 (Cross-Manufacturer Substitute - Alternative Selection)

The GI510-E3/54 manufactured by Vishay General Semiconductor - Diodes Division provides functional equivalence with identical voltage and current ratings. This part maintains the same 1000 V reverse voltage, 3 A average rectified current, and DO-201AD axial package configuration. The GI510-E3/54 exhibits lower capacitance (28 pF versus 40 pF) and operates across a slightly narrower temperature range (-50 to 150 °C versus -55 to 150 °C). Both parts are ROHS3 compliant. The GI510-E3/54 is supplied in Cut Tape packaging and maintains the highest inventory availability (6185 units). This substitute is suitable for applications where cross-manufacturer sourcing is acceptable and where the reduced capacitance characteristic is compatible with circuit requirements.

Product Status Consideration

The 1N5408-AP is classified as obsolete. Selection of either active substitute (1N5408GP-AP or GI510-E3/54) is necessary for new procurement activities. Existing inventory of the 1N5408-AP may be utilized for ongoing maintenance and repair applications where original part specifications are required.

Frequently Asked Questions (FAQ)

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

A: Yes. The 1N5408GP-AP is electrically and mechanically equivalent to the 1N5408-AP. Both parts share identical voltage ratings (1000 V), current ratings (3 A), package configuration (DO-201AD axial), and mounting type (through-hole). The forward voltage specification differs by 0.1 V (1.1 V versus 1 V at 3 A), which is within standard rectifier diode tolerance ranges and does not affect functional compatibility in general purpose rectification applications.

Q: What is the difference between the 1N5408GP-AP and GI510-E3/54?

A: Both parts meet the core electrical requirements: 1000 V reverse voltage, 3 A average rectified current, and DO-201AD axial package. The primary differences are manufacturer (Micro Commercial Co versus Vishay), capacitance specification (40 pF versus 28 pF at 4V, 1MHz), and operating temperature range (-55 to 150 °C versus -50 to 150 °C). The GI510-E3/54 offers higher inventory availability and cross-manufacturer sourcing flexibility.

Q: Why is the 1N5408-AP listed as obsolete?

A: The 1N5408-AP has been superseded by the active variant 1N5408GP-AP from the same manufacturer. Obsolete status indicates that the original part number is no longer in active production, though existing inventory may remain available. Active substitutes ensure continued design support and procurement continuity.

Q: Are all three parts ROHS3 compliant?

A: Yes. The 1N5408-AP, 1N5408GP-AP, and GI510-E3/54 are all ROHS3 compliant, meeting environmental and regulatory requirements for lead-free and restricted substance compliance.

Q: What packaging formats are available for these parts?

A: The 1N5408-AP packaging format is not specified in available documentation. The 1N5408GP-AP is supplied in Tape & Box (TB) format. The GI510-E3/54 is supplied in Cut Tape (CT) format. All three parts use the same DO-201AD axial through-hole package configuration for circuit board mounting.

Q: Can the GI510-E3/54 be used in high-frequency applications where capacitance is critical?

A: The GI510-E3/54 exhibits lower capacitance (28 pF) compared to the 1N5408-AP and 1N5408GP-AP (40 pF). In applications where capacitance characteristics directly affect circuit performance, the reduced capacitance of the GI510-E3/54 must be evaluated against circuit requirements. Both specifications fall within standard rectifier diode ranges for general purpose applications.

Q: What is the minimum operating temperature range supported by all substitutes?

A: The 1N5408-AP and 1N5408GP-AP support -55 °C minimum junction temperature. The GI510-E3/54 supports -50 °C minimum junction temperature. For applications requiring operation below -50 °C, the 1N5408GP-AP is the appropriate selection.

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