1N5394GP-AP Equivalent & Substitute Parts

Part Overview

The 1N5394GP-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 300 V DC reverse voltage and 1.5 A average rectified current in a DO-15 through-hole package. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts is necessary for applications requiring continued support, legacy system maintenance, or when original stock becomes unavailable.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	300	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.4 V @ 1.5 A	V
Current - Reverse Leakage @ Vr	5	µA @ 300 V
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1N5394GP-AP is determined by equivalence in the following critical parameters:

Voltage Rating: Reverse voltage must equal or exceed 300 V DC
Current Rating: Average rectified current must equal or exceed 1.5 A
Package Type: Physical form factor must be DO-15 or DO-204AC (axial through-hole)
Mounting: Through-hole configuration required for PCB compatibility
Operating Temperature Range: Junction temperature range must encompass -55°C to 150°C
Regulatory Compliance: RoHS3 compliance required for environmental standards

The HER154G A0G from Taiwan Semiconductor Corporation meets all substitution criteria. While it exhibits improved performance characteristics (faster recovery time, lower forward voltage), these enhancements do not disqualify it as a direct substitute; they represent superior electrical performance within the same functional category.

Parameter Comparison

Parameter	1N5394GP-AP (Micro Commercial Co)	HER154G A0G (Taiwan Semiconductor)	Match Status
Voltage - DC Reverse (Vr) (Max)	300 V	300 V	Equivalent
Current - Average Rectified (Io)	1.5 A	1.5 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.4 V @ 1.5 A	1.0 V @ 1.5 A	Substitute Superior
Current - Reverse Leakage @ Vr	5 µA @ 300 V	5 µA @ 300 V	Equivalent
Speed Classification	Standard Recovery >500ns	Fast Recovery ≤500ns	Substitute Superior
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	Equivalent
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Product Status	Not For New Designs	Active	Substitute Current

Engineering Selection Recommendations

Primary Substitute: HER154G A0G

The HER154G A0G is the qualified substitute for the 1N5394GP-AP based on the following engineering criteria:

Electrical Equivalence: Both components share identical voltage and current ratings (300 V, 1.5 A), ensuring direct functional replacement in circuit applications.
Package Compatibility: Both components use DO-15 axial through-hole packaging, permitting direct PCB footprint compatibility without layout modification.
Regulatory Compliance: The HER154G A0G maintains ROHS3 compliance and REACH unaffected status, matching the environmental and regulatory requirements of the original part.
Product Status Advantage: The HER154G A0G carries "Active" product status, ensuring continued availability and manufacturer support, whereas the 1N5394GP-AP is designated "Not For New Designs."
Performance Enhancement: The substitute exhibits superior electrical characteristics (lower forward voltage drop of 1.0 V versus 1.4 V, and faster recovery time ≤500ns versus >500ns), which provide operational benefits without introducing compatibility issues.

Frequently Asked Questions (FAQ)

Q: Can the HER154G A0G be used as a direct replacement for the 1N5394GP-AP in existing designs?

A: Yes. Both components share identical voltage ratings (300 V), current ratings (1.5 A), operating temperature ranges (-55°C to 150°C), and DO-15 axial through-hole packaging. No circuit modifications or PCB layout changes are required.

Q: What is the significance of the "Not For New Designs" status on the 1N5394GP-AP?

A: This designation indicates the manufacturer has discontinued active development and promotion of this part number. The HER154G A0G, with "Active" status, represents the current-generation equivalent and is recommended for new applications.

Q: Are there differences in forward voltage drop between these parts?

A: Yes. The 1N5394GP-AP specifies a maximum forward voltage of 1.4 V at 1.5 A, while the HER154G A0G specifies 1.0 V at 1.5 A. This 0.4 V difference results in lower power dissipation with the substitute part. Both values remain within acceptable ranges for general-purpose rectification applications.

Q: What does "Fast Recovery" versus "Standard Recovery" mean?

A: Recovery speed refers to the time required for a diode to transition from conducting to blocking state. The HER154G A0G exhibits fast recovery (≤500ns with 50 ns reverse recovery time), while the 1N5394GP-AP exhibits standard recovery (>500ns). Fast recovery reduces switching losses and is beneficial in high-frequency applications, though both are suitable for standard rectification.

Q: Are the packages physically identical?

A: Both components use DO-15 axial through-hole packaging (also designated DO-204AC). Physical dimensions and lead spacing are identical, permitting direct substitution without PCB modification.

Q: Do both parts meet the same environmental and regulatory standards?

A: Yes. Both the 1N5394GP-AP and HER154G A0G are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. They meet identical environmental and regulatory requirements.

Q: Is the HER154G A0G available in the same packaging format?

A: Yes. The HER154G A0G is supplied in DO-204AC (DO-15) axial through-hole packaging, identical to the 1N5394GP-AP. The supplier device package designation confirms this compatibility.

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