SF3006PTH Equivalent & Substitute Parts

Part Overview

The SF3006PTH is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 30 A average rectified current in a through-hole TO-247AD package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part carries automotive-grade qualification (AEC-Q101) and is ROHS3 compliant, making it suitable for applications requiring high reliability standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	30	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 15 A	V
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	TO-247-3	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SF3006PTH is determined by strict equivalence or functional compatibility across the following critical parameters:

Parametric Equivalent Classification: Parts must maintain identical or superior electrical ratings in voltage (Vr), current (Io), forward voltage (Vf), and recovery characteristics (trr). Package compatibility (TO-247-3 through-hole) is mandatory. Compliance certifications (RoHS3, AEC-Q101 where applicable) must be maintained or exceeded.

Similar Manufacturer Classification: Parts with higher current ratings (Io > 30 A) or modified recovery times (trr > 35 ns) are classified as similar rather than direct equivalents. These parts function in the same voltage class and package family but require circuit-level validation for applications with strict current or switching speed requirements.

The SF3006PTH substitutes are grouped as follows:

Parametric Equivalent: SF3006PT (identical electrical specifications, packaging variation only)
Similar Manufacturer: STTH61W04SW (higher current rating, modified recovery characteristics)

Parameter Comparison

Parameter	SF3006PTH	SF3006PT	STTH61W04SW
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V
Current - Average Rectified (Io)	30 A	30 A	60 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 15 A	1.3 V @ 15 A	1.35 V @ 60 A
Reverse Recovery Time (trr)	35 ns	35 ns	55 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 V	10 µA @ 400 V	20 µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case	TO-247-3	TO-247-3	TO-247-3
Mounting Type	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction (Max)	150°C	150°C	175°C
Product Status	Discontinued at DiGi Electronics	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SF3006PT (Parametric Equivalent): This part is the direct functional equivalent of the SF3006PTH. It maintains identical electrical specifications across all critical parameters: 400 V reverse voltage, 30 A average rectified current, 1.3 V forward voltage at 15 A, and 35 ns reverse recovery time. The only difference is packaging format (tube versus the original specification). SF3006PT carries active product status and ROHS3 compliance, ensuring continued availability and regulatory conformance. This part is the primary substitute for direct replacement in existing designs.

STTH61W04SW (Similar Manufacturer): This STMicroelectronics part operates at the same 400 V voltage class and shares the TO-247-3 through-hole package. However, it is rated for 60 A average rectified current (double the SF3006PTH specification) and exhibits a longer reverse recovery time of 55 ns compared to 35 ns. The reverse leakage current is also higher at 20 µA. This part is suitable for applications where higher current capacity is required or beneficial, provided the circuit design accommodates the modified recovery characteristics. STTH61W04SW is active and ROHS3 compliant. The maximum junction temperature of 175°C exceeds the SF3006PTH rating of 150°C, offering improved thermal margin.

Selection between SF3006PT and STTH61W04SW depends on application current requirements and switching speed constraints. For designs requiring exact electrical equivalence, SF3006PT is the appropriate choice. For applications with higher current demands or where extended thermal operating range is advantageous, STTH61W04SW is suitable.

Frequently Asked Questions (FAQ)

Q: Can SF3006PT be used as a direct replacement for SF3006PTH?

A: Yes. SF3006PT is a parametric equivalent with identical electrical specifications. The parts differ only in packaging format (tube versus the original specification). Both maintain 400 V reverse voltage, 30 A current rating, and 35 ns recovery time. Both are ROHS3 compliant and carry active product status.

Q: What are the key differences between SF3006PTH and STTH61W04SW?

A: The primary differences are current rating (30 A versus 60 A), reverse recovery time (35 ns versus 55 ns), reverse leakage current (10 µA versus 20 µA), and maximum junction temperature (150°C versus 175°C). Both operate at 400 V and use the TO-247-3 package. STTH61W04SW is suitable for higher-current applications but requires validation of switching speed performance.

Q: Are all substitute parts through-hole mounted?

A: Yes. Both SF3006PT and STTH61W04SW are through-hole mounted components in the TO-247-3 package, maintaining mechanical compatibility with the original SF3006PTH.

Q: Do the substitute parts meet automotive qualification requirements?

A: SF3006PT is manufactured by Taiwan Semiconductor Corporation and carries ROHS3 compliance. STTH61W04SW is manufactured by STMicroelectronics and carries ROHS3 compliance. The original SF3006PTH carries AEC-Q101 automotive qualification. Specific automotive qualification status for the substitute parts should be verified against application requirements.

Q: What is the operating temperature range for each part?

A: SF3006PTH and SF3006PT both operate from -55°C to 150°C junction temperature. STTH61W04SW operates to a maximum junction temperature of 175°C, providing a 25°C higher thermal ceiling.

Q: Can STTH61W04SW be used in all applications where SF3006PTH is specified?

A: STTH61W04SW can be used in applications where the higher current rating (60 A) and extended temperature range (175°C maximum) do not create design conflicts. The longer recovery time (55 ns versus 35 ns) must be evaluated for switching frequency and EMI performance. Circuit-level validation is required for applications with strict switching speed or noise specifications.

Q: What is the inventory status of these parts?

A: SF3006PTH is discontinued at DiGi Electronics with 972 pieces in stock. SF3006PT is active with 1610 pieces in stock. STTH61W04SW is active with 1434 pieces in stock. Availability should be confirmed with the supplier for production requirements.

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