30EPF12 Equivalent & Substitute Parts

Part Overview

The 30EPF12 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1200 V DC reverse voltage and 30 A average rectified current in a TO-247AC Modified through-hole package. This component is classified as obsolete, indicating that direct replacement with active production alternatives is necessary for new designs and ongoing procurement requirements.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1200 V
Current - Average Rectified (Io)	30 A
Voltage - Forward (Vf) (Max) @ If	1.41 V @ 30 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	160 ns
Current - Reverse Leakage @ Vr	100 µA @ 1200 V
Mounting Type	Through Hole
Package / Case	TO-247-2
Operating Temperature - Junction	-40°C ~ 150°C
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the 30EPF12 is determined by the following critical parameters:

Voltage Rating: All substitute parts maintain the 1200 V DC reverse voltage specification, ensuring compatibility with the original circuit voltage requirements.

Current Rating: Substitute parts are grouped into two categories: direct current rating matches (30 A) and higher current ratings (52 A and 60 A). Parts with equal or higher current ratings are electrically compatible, as they can handle the same or greater load without exceeding design limits.

Package Type: The original TO-247AC Modified package is compatible with TO-247AD and TO-247-3 (ISOPLUS247™) variants, as these are mechanical variants of the same TO-247 family with identical pin configurations and mounting footprints.

Technology: All substitute parts employ standard fast recovery diode technology with reverse recovery times within the fast recovery classification (≤ 500ns).

Product Status: Active production status is required for new designs and long-term availability. The 30EPF12 obsolete status necessitates transition to active alternatives.

Compliance: RoHS3 compliance is available across multiple substitute options, addressing regulatory requirements for new applications.

Parameter Comparison

Parameter	30EPF12	DSEI30-12A	DSEI60-12A	DHG60I1200HA	DSEP30-12A	DSEP30-12AR	DSEP30-12CR	STTH3012W
Manufacturer	Vishay	IXYS	IXYS	IXYS	IXYS	IXYS	IXYS	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	1200 V	1200 V	1200 V	1200 V	1200 V	1200 V	1200 V	1200 V
Current - Average Rectified (Io)	30 A	26 A	52 A	60 A	30 A	30 A	30 A	30 A
Voltage - Forward (Vf) (Max) @ If	1.41 V @ 30 A	2.55 V @ 30 A	2.55 V @ 60 A	2.32 V @ 60 A	2.74 V @ 30 A	2.74 V @ 30 A	4.98 V @ 30 A	2.25 V @ 30 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Reverse Recovery Time (trr)	160 ns	60 ns	60 ns	200 ns	40 ns	40 ns	15 ns	115 ns
Current - Reverse Leakage @ Vr	100 µA @ 1200 V	750 µA @ 1200 V	2.2 mA @ 1200 V	125 µA @ 1200 V	250 µA @ 1200 V	250 µA @ 1200 V	250 µA @ 1200 V	20 µA @ 1200 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-2	TO-247-2	TO-247-2	TO-247-2	TO-247-2	TO-247-3	ISOPLUS247™	DO-247-2
Operating Temperature - Junction	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	Max 175°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Current Rating Match (30 A):

DSEP30-12A, DSEP30-12AR, DSEP30-12CR, and STTH3012W are electrically equivalent to the 30EPF12 at the 30 A current rating. All four parts are in active production status with RoHS3 compliance. DSEP30-12A and DSEP30-12AR offer extended operating temperature ranges (-55°C to 175°C) compared to the original specification (-40°C to 150°C). STTH3012W provides the lowest forward voltage drop (2.25 V @ 30 A) and lowest reverse leakage current (20 µA @ 1200 V), resulting in improved thermal efficiency.

Higher Current Rating Options (52 A and 60 A):

DSEI60-12A (52 A) and DHG60I1200HA (60 A) provide current ratings exceeding the original 30 A specification. These parts are suitable for applications where circuit redesign permits higher current capacity. Both are in active production with RoHS3 compliance.

Lower Current Rating Option (26 A):

DSEI30-12A is rated for 26 A, which is below the original 30 A specification. This part is suitable only for applications where the actual circuit current requirement is confirmed to be 26 A or less.

Package Considerations:

DSEP30-12AR uses ISOPLUS247™ package (TO-247-3), which differs mechanically from the original TO-247AC Modified. DSEP30-12CR also uses ISOPLUS247™ package. These variants require PCB layout verification for pin spacing compatibility. STTH3012W uses DO-247 package, which is mechanically distinct from TO-247 variants and requires PCB redesign.

Compliance Status:

All substitute parts are RoHS3 compliant, addressing regulatory requirements for new designs. The original 30EPF12 is RoHS non-compliant and unsuitable for applications with RoHS compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can DSEI30-12A replace the 30EPF12 directly?

A: DSEI30-12A is electrically compatible at the 1200 V and 26 A ratings. However, the 26 A current rating is below the original 30 A specification. Direct substitution is valid only if circuit analysis confirms that actual operating current does not exceed 26 A. The part is in active production with RoHS3 compliance and improved reverse recovery time (60 ns vs. 160 ns).

Q: What is the difference between DSEP30-12A and DSEP30-12AR?

A: Both parts are rated for 1200 V and 30 A with identical electrical characteristics. DSEP30-12A uses TO-247-2 package, while DSEP30-12AR uses ISOPLUS247™ (TO-247-3) package. The ISOPLUS247™ variant requires PCB layout verification for pin spacing compatibility. Both are in active production with RoHS3 compliance and extended temperature range (-55°C to 175°C).

Q: Why does DSEP30-12CR have a higher forward voltage drop (4.98 V)?

A: DSEP30-12CR is a bridge rectifier configuration (HiPerDynFRED™ series) with significantly faster reverse recovery time (15 ns). The higher forward voltage reflects the bridge topology. This part is suitable for applications requiring ultra-fast switching performance.

Q: Can I use DHG60I1200HA or DSEI60-12A as direct replacements?

A: These parts are electrically compatible at the 1200 V voltage rating and exceed the 30 A current requirement. DHG60I1200HA is rated for 60 A and DSEI60-12A for 52 A. Both are in active production with RoHS3 compliance. Direct PCB substitution is valid without circuit redesign, as higher current-rated components operate safely at lower current levels.

Q: Is STTH3012W compatible with the original TO-247AC Modified footprint?

A: STTH3012W uses DO-247 package, which is mechanically distinct from TO-247 variants. PCB redesign is required for this substitution. However, STTH3012W offers superior electrical performance with the lowest forward voltage drop (2.25 V @ 30 A) and lowest reverse leakage current (20 µA @ 1200 V) among all substitutes.

Q: What are the compliance advantages of switching from 30EPF12?

A: The 30EPF12 is RoHS non-compliant. All substitute parts listed are RoHS3 compliant, meeting regulatory requirements for new designs and applications subject to RoHS directives. This compliance status is mandatory for many industrial and consumer applications.

Q: Which substitute offers the best thermal performance?

A: STTH3012W provides the lowest forward voltage drop (2.25 V @ 30 A) and lowest reverse leakage current (20 µA @ 1200 V), resulting in the lowest power dissipation and thermal generation. DSEP30-12CR offers the fastest reverse recovery time (15 ns), reducing switching losses in high-frequency applications.

Q: Can I use a 26 A rated part in a 30 A application?

A: DSEI30-12A is rated for 26 A, which is below the original 30 A specification. Substitution is valid only if circuit analysis confirms that actual operating current does not exceed 26 A under all operating conditions, including transient and fault scenarios.

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