Equivalent & Substitute Parts for 30EPH03

Part Overview

The 30EPH03 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 300 V DC reverse voltage and 30 A average rectified current in a TO-247AC Modified package. This device is classified as obsolete, indicating that direct procurement may become unavailable. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for applications requiring fast recovery rectification in high-current power conversion circuits.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	300	V
Current - Average Rectified (Io)	30	A
Voltage - Forward (Vf) (Max) @ If	1.25	V @ 30 A
Reverse Recovery Time (trr)	55	ns
Current - Reverse Leakage @ Vr	60	µA @ 300 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	TO-247-2	—
Operating Temperature - Junction	-65 to 175	°C
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitute parts for the 30EPH03 are identified based on the following critical parameters:

Voltage Rating Compatibility: All substitute parts must maintain the 300 V DC reverse voltage specification to ensure safe operation in the target application circuit.

Current Handling Capability: Substitute parts must support at least 30 A average rectified current. Parts with higher current ratings (such as 60 A) are acceptable as they provide design margin and enhanced thermal performance.

Package and Mounting: All substitutes use the TO-247-2 package with through-hole mounting, ensuring mechanical and thermal interface compatibility.

Speed Classification: All substitutes maintain fast recovery characteristics (≤ 500 ns), preserving switching performance in rectification circuits.

Temperature Range: Operating temperature ranges must encompass the application requirements; substitutes with equivalent or extended ranges are acceptable.

Compliance Status: Active product status and RoHS3 compliance are preferred to ensure long-term availability and regulatory conformance.

Parameter Comparison

Parameter	30EPH03	VS-30EPH03-N3	DPG60I300HA
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	IXYS
Voltage - DC Reverse (Vr) (Max)	300 V	300 V	300 V
Current - Average Rectified (Io)	30 A	30 A	60 A
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 30 A	1.25 V @ 30 A	1.4 V @ 60 A
Reverse Recovery Time (trr)	55 ns	38 ns	35 ns
Current - Reverse Leakage @ Vr	60 µA @ 300 V	60 µA @ 300 V	1 µA @ 300 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-2	TO-247-2	TO-247-2
Operating Temperature - Junction	-65 to 175 °C	-65 to 175 °C	-55 to 175 °C
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: VS-30EPH03-N3

The VS-30EPH03-N3 is the parametric equivalent to the 30EPH03, manufactured by the same supplier (Vishay General Semiconductor - Diodes Division). This part maintains identical voltage and current ratings, forward voltage characteristics, and operating temperature range. The VS-30EPH03-N3 offers improved reverse recovery time (38 ns versus 55 ns), enhanced switching performance, and active product status ensuring continued availability. RoHS3 compliance satisfies modern regulatory requirements. This substitute is the direct replacement for applications requiring exact electrical and thermal performance matching.

Alternative Substitute: DPG60I300HA

The DPG60I300HA, manufactured by IXYS under the HiPerFRED™ series, provides a higher current rating (60 A versus 30 A) while maintaining the 300 V voltage specification and TO-247-2 package. This part is suitable for applications where design margin or thermal headroom is beneficial. The DPG60I300HA exhibits superior reverse recovery time (35 ns) and significantly lower reverse leakage current (1 µA versus 60 µA), resulting in reduced power dissipation and improved efficiency. The operating temperature range extends to -55°C minimum, which is acceptable for most industrial applications. RoHS3 compliance and active product status ensure long-term supply availability. This substitute is appropriate when higher current capacity and improved performance characteristics are acceptable within the circuit design.

Compliance Consideration: Both substitute parts are RoHS3 compliant, whereas the original 30EPH03 is non-compliant. Selection of either substitute aligns with current environmental and regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can the VS-30EPH03-N3 be used as a direct replacement for the 30EPH03?

A: Yes. The VS-30EPH03-N3 maintains identical voltage rating (300 V), current rating (30 A), forward voltage (1.25 V @ 30 A), and operating temperature range (-65 to 175 °C). Both parts use the TO-247-2 package. The VS-30EPH03-N3 offers improved reverse recovery time (38 ns versus 55 ns) and active product status, making it the direct equivalent.

Q: What is the difference between the 30EPH03 and the DPG60I300HA?

A: The primary difference is current rating: the DPG60I300HA is rated for 60 A average rectified current compared to 30 A for the 30EPH03. Both maintain 300 V voltage rating and TO-247-2 packaging. The DPG60I300HA exhibits faster reverse recovery (35 ns), lower reverse leakage (1 µA), and is manufactured by IXYS rather than Vishay. The DPG60I300HA is suitable when higher current capacity or improved performance is required.

Q: Are all substitute parts in the same package?

A: Yes. The 30EPH03, VS-30EPH03-N3, and DPG60I300HA all use the TO-247-2 package with through-hole mounting. Mechanical and thermal interface compatibility is maintained across all three parts.

Q: What is the significance of the reverse recovery time difference?

A: Reverse recovery time (trr) affects switching speed and switching losses in rectification circuits. The 30EPH03 has trr of 55 ns, while the VS-30EPH03-N3 has 38 ns and the DPG60I300HA has 35 ns. Faster recovery reduces switching losses and improves efficiency, particularly in high-frequency applications. All three parts are classified as fast recovery devices (≤ 500 ns).

Q: Why is the 30EPH03 marked as obsolete?

A: Obsolete status indicates that the manufacturer has discontinued production and support for this part. Identifying active equivalent parts ensures design continuity and supply chain reliability. Both substitute parts (VS-30EPH03-N3 and DPG60I300HA) have active product status.

Q: Does the higher current rating of the DPG60I300HA affect circuit compatibility?

A: No. A higher current rating does not negatively affect circuit compatibility. The DPG60I300HA can be used in applications designed for 30 A operation, as it will simply operate at lower stress levels. The voltage rating (300 V) and package (TO-247-2) remain compatible with the original design.

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

A: Reverse leakage current affects power dissipation and circuit performance at reverse bias conditions. The 30EPH03 and VS-30EPH03-N3 have 60 µA leakage at 300 V, while the DPG60I300HA has only 1 µA. Lower leakage reduces standby power consumption and heat generation, improving overall circuit efficiency.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both the VS-30EPH03-N3 and DPG60I300HA are RoHS3 compliant, whereas the original 30EPH03 is non-compliant. Selection of either substitute aligns with current environmental regulations and industry standards.

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