SF3005PT Equivalent & Substitute Parts

Part Overview

The SF3005PT is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 300 V DC reverse voltage and 30 A average rectified current in a TO-247AD (TO-3P) through-hole package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer comparable performance within defined parameter tolerances suitable for the same application categories.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	300	V
Current - Average Rectified (Io)	30	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 15 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	10	µA @ 300 V
Mounting Type	Through Hole	—
Package / Case	TO-247-3	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SF3005PT is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 300 V minimum
Current - Average Rectified (Io): 30 A minimum per diode element
Mounting Type: Through Hole
Package / Case: TO-247-3 compatible
Technology: Standard rectifier diode technology
RoHS3 Compliance: Required

Secondary Compatibility Factors:

Forward voltage (Vf) characteristics within acceptable operating ranges
Reverse recovery time (trr) for fast recovery applications
Reverse leakage current specifications
Operating temperature range compatibility

Parts are grouped into two categories:

Parametric Equivalent: SF3005PTHC0G maintains identical electrical specifications and adds automotive-grade qualification (AEC-Q101), representing a direct functional replacement with enhanced reliability certification.

Similar Substitutes: Parts including DPG80C300HB, SDUR3030WT, STTH30L06CW, STTH6003CW, STTH60P03SW, and VS-80CPH03-N3 provide comparable rectification performance within the 300 V class but may feature different current ratings, diode configurations (array vs. single), or thermal characteristics. These parts are suitable for applications where the specific parameter variations do not conflict with circuit requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Status
SF3005PT	Taiwan Semiconductor	300	30	1.3 @ 15A	35	10 @ 300V	TO-247-3	-55 to 150	Discontinued
SF3005PTHC0G	Taiwan Semiconductor	300	30	1.3 @ 15A	35	10 @ 300V	TO-247-3	-55 to 150	Active
DPG80C300HB	IXYS	300	40	1.36 @ 40A	35	1 @ 300V	TO-247-3	-55 to 175	Active
SDUR3030WT	SMC Diode Solutions	300	15	1.25 @ 10A	45	5 @ 300V	TO-247-3	-55 to 150	Active
STTH30L06CW	STMicroelectronics	600	20	1.55 @ 15A	85	15 @ 600V	TO-247-3	-55 to 175	Active
STTH6003CW	STMicroelectronics	300	30	1.25 @ 30A	55	60 @ 300V	TO-247-3	-55 to 175	Active
STTH60P03SW	STMicroelectronics	300	60	1.5 @ 30A	—	100 @ 300V	TO-247-3	-55 to 175	Active
VS-80CPH03-N3	Vishay General Semiconductor	300	20	1.25 @ 40A	35	10 @ 300V	TO-247-3	-65 to 175	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent):

SF3005PTHC0G is the recommended direct replacement for SF3005PT. This part maintains identical electrical specifications (300 V, 30 A, 35 ns recovery time) and mechanical compatibility while offering active product status. The addition of AEC-Q101 automotive qualification provides enhanced reliability documentation suitable for demanding applications. This part is currently in active production with 855 units in stock.

Higher Current Capacity Substitutes:

DPG80C300HB (IXYS HiPerFRED²™ series) and STTH60P03SW (STMicroelectronics) provide 40 A and 60 A ratings respectively at 300 V, suitable for applications requiring current margin above the 30 A specification. Both maintain TO-247-3 packaging and fast recovery characteristics. DPG80C300HB offers superior reverse leakage performance (1 µA vs. 10 µA), while STTH60P03SW provides the highest current capacity. Extended temperature range to 175°C is available in both options.

Lower Current Substitutes:

SDUR3030WT (SMC Diode Solutions) and VS-80CPH03-N3 (Vishay) provide 15 A and 20 A ratings respectively. These are suitable only for applications where the circuit current requirement does not exceed their rated values. SDUR3030WT is a diode array configuration (1 Pair Common Cathode), while VS-80CPH03-N3 maintains similar leakage and recovery characteristics to the original part.

Higher Voltage Substitute:

STTH30L06CW (STMicroelectronics) operates at 600 V with 20 A current rating. This part is suitable for applications requiring higher voltage margin but with reduced current capacity. The extended temperature range (-55°C to 175°C) and extended reverse recovery time (85 ns) must be evaluated against circuit timing requirements.

Compliance and Availability:

All recommended substitutes maintain ROHS3 compliance and EAR99 export classification. SF3005PTHC0G, DPG80C300HB, STTH6003CW, STTH60P03SW, and VS-80CPH03-N3 are in active production with substantial inventory availability (855 to 450,200 units). SDUR3030WT carries REACH Affected status, requiring compliance verification in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can SF3005PTHC0G be used as a direct replacement for SF3005PT?

A: Yes. SF3005PTHC0G is a parametric equivalent with identical voltage (300 V), current (30 A), recovery time (35 ns), and package specifications (TO-247-3). The primary difference is active product status and AEC-Q101 automotive qualification. This part is the recommended replacement.

Q: What is the difference between a single diode and a diode array substitute?

A: The SF3005PT is a single diode element. Substitutes such as DPG80C300HB, SDUR3030WT, STTH6003CW, and STTH30L06CW are diode arrays with 1 Pair Common Cathode configuration, containing two diode elements sharing a common cathode connection. Array configurations require circuit redesign to accommodate the additional element and common cathode topology. Single diode substitutes (STTH60P03SW, VS-80CPH03-N3) maintain the original topology.

Q: Can STTH60P03SW replace SF3005PT in all applications?

A: STTH60P03SW provides 60 A current capacity at 300 V, exceeding the 30 A requirement. However, the forward voltage (1.5 V @ 30 A) is higher than SF3005PT (1.3 V @ 15 A), resulting in increased power dissipation. The reverse leakage current (100 µA @ 300 V) is significantly higher than the original (10 µA @ 300 V). These differences must be evaluated against thermal management and leakage current specifications in the target application.

Q: Is STTH30L06CW suitable as a substitute?

A: STTH30L06CW operates at 600 V, providing higher voltage margin than the 300 V requirement. However, the current rating is reduced to 20 A, below the 30 A specification. This part is suitable only for applications where circuit current does not exceed 20 A and higher voltage rating is beneficial. The extended reverse recovery time (85 ns vs. 35 ns) may affect switching performance in high-frequency applications.

Q: What is the significance of reverse recovery time (trr) in diode selection?

A: Reverse recovery time determines how quickly a diode transitions from conducting to blocking state. SF3005PT specifies 35 ns. Substitutes with longer trr values (SDUR3030WT at 45 ns, STTH30L06CW at 85 ns, STTH6003CW at 55 ns) may introduce switching delays in high-frequency rectification circuits. Substitutes with matching or shorter trr (STTH60P03SW, VS-80CPH03-N3) maintain equivalent switching performance.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 Compliant status. However, SDUR3030WT carries REACH Affected designation, requiring compliance verification for applications subject to REACH regulations. All other substitutes are REACH Unaffected.

Q: What is the operating temperature range consideration?

A: SF3005PT operates from -55°C to 150°C junction temperature. Most substitutes extend the upper limit to 175°C (DPG80C300HB, STTH6003CW, STTH60P03SW, VS-80CPH03-N3), providing thermal margin. VS-80CPH03-N3 extends the lower limit to -65°C. Applications operating near the 150°C limit benefit from substitutes with extended temperature range.

Q: Can multiple lower-current parts be paralleled to replace SF3005PT?

A: Paralleling diodes requires careful circuit design to ensure current sharing and thermal balance. This approach is not recommended as a standard substitution practice without detailed thermal and electrical analysis. Single-element substitutes with adequate current rating (DPG80C300HB at 40 A, STTH60P03SW at 60 A) are preferred for direct replacement.

Q: What inventory considerations apply to these substitutes?

A: SF3005PTHC0G (855 units), DPG80C300HB (2,260 units), STTH6003CW (32,300 units), STTH60P03SW (10,300 units), and VS-80CPH03-N3 (450,200 units) are in active production with substantial stock. SDUR3030WT (698 units) and STTH30L06CW (1,340 units) have lower inventory levels. Long-term availability is assured for all active-status parts.

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