SF1606PTHC0G Equivalent & Substitute Parts

Part Overview

The SF1606PTHC0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 16 A average rectified current. The device is packaged in a through-hole TO-247AD (TO-3P) configuration and is classified as a fast recovery diode with a reverse recovery time of 35 nanoseconds. This component is actively produced and carries AEC-Q101 automotive qualification, making it suitable for automotive and industrial applications requiring reliable rectification at moderate current levels.

Alternative components may be required due to inventory constraints, packaging preferences, or application-specific performance requirements. The substitute parts listed below maintain electrical compatibility within defined parameters while offering different packaging options or enhanced performance characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	16	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A	V
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Mounting Type	Through Hole	-
Package / Case	TO-247-3	-
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	-
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-

Substitute Part Grouping Explanation

Substitution eligibility for the SF1606PTHC0G is determined by the following critical parameters:

Parametric Equivalent Classification: Parts maintaining identical electrical specifications across voltage rating (400 V), current rating (16 A), forward voltage drop (1.3 V @ 8 A), reverse recovery time (35 ns), reverse leakage current (10 µA @ 400 V), and through-hole TO-247-3 package configuration are classified as parametric equivalents. These parts are directly interchangeable without circuit modification.

Similar Part Classification: Parts sharing the same voltage rating (400 V) and package type (TO-247-3) but differing in current rating, forward voltage characteristics, or reverse recovery time are classified as similar parts. These components require application-level verification to confirm suitability, as they may exhibit different thermal and electrical performance characteristics.

The SF1606PTHC0G substitute list includes:

SF1606PT: Parametric equivalent with identical electrical specifications and different packaging (tube vs. tape and reel)
STTH61W04SW: Similar part with higher current rating (60 A) and different reverse recovery time (55 ns)

Parameter Comparison

Parameter	SF1606PTHC0G	SF1606PT	STTH61W04SW
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V
Current - Average Rectified (Io)	16 A	16 A	60 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A	1.3 V @ 8 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
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-3	TO-247-3	TO-247-3
Supplier Device Package	TO-247AD (TO-3P)	TO-247AD (TO-3P)	TO-247
Operating Temperature - Junction (Max)	150°C	150°C	175°C
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SF1606PT Selection: The SF1606PT is a direct parametric equivalent to the SF1606PTHC0G, offering identical electrical performance and thermal characteristics. The only distinction is packaging format: SF1606PT is supplied in tube packaging, while SF1606PTHC0G is supplied in tape and reel format. Both components maintain active product status, AEC-Q101 automotive qualification (where applicable), ROHS3 compliance, and unlimited moisture sensitivity rating. Selection of SF1606PT is appropriate when tube packaging aligns with procurement or assembly requirements.

STTH61W04SW Selection: The STTH61W04SW is a higher-current variant manufactured by STMicroelectronics, rated for 60 A average rectified current compared to the 16 A rating of the SF1606PTHC0G. This component shares the 400 V voltage rating and TO-247-3 package configuration but exhibits a longer reverse recovery time (55 ns versus 35 ns) and higher reverse leakage current (20 µA versus 10 µA at 400 V). The STTH61W04SW supports a maximum junction temperature of 175°C, exceeding the 150°C maximum of the SF1606PTHC0G. This component is suitable for applications requiring higher current capacity within the same voltage class, provided circuit design accommodates the increased reverse recovery time and leakage characteristics. All three components maintain active product status and full compliance with ROHS3 and REACH requirements.

Frequently Asked Questions (FAQ)

Q: Can SF1606PT be used as a direct replacement for SF1606PTHC0G?

A: Yes. The SF1606PT is a parametric equivalent with identical electrical specifications, including voltage rating (400 V), current rating (16 A), forward voltage drop (1.3 V @ 8 A), reverse recovery time (35 ns), and reverse leakage current (10 µA @ 400 V). The components differ only in packaging format (tube versus tape and reel). Direct substitution is permissible without circuit modification.

Q: What are the limitations of using STTH61W04SW as a substitute?

A: The STTH61W04SW differs in three key parameters: current rating (60 A versus 16 A), reverse recovery time (55 ns versus 35 ns), and reverse leakage current (20 µA versus 10 µA at 400 V). The higher current rating does not create a limitation for circuits designed for 16 A operation. However, the increased reverse recovery time may affect switching performance in high-frequency applications, and the higher leakage current may impact standby power consumption in sensitive circuits. The maximum junction temperature of 175°C provides additional thermal margin compared to the 150°C limit of the SF1606PTHC0G.

Q: Are all three diodes suitable for automotive applications?

A: The SF1606PTHC0G carries AEC-Q101 automotive qualification. The SF1606PT, as a parametric equivalent from the same manufacturer, maintains equivalent automotive-grade specifications. The STTH61W04SW is manufactured by STMicroelectronics and maintains ROHS3 compliance and REACH compliance status. Automotive qualification status for the STTH61W04SW is not specified in the provided parameters. Confirmation of automotive qualification requirements should be obtained from the application specification before selecting the STTH61W04SW for automotive use.

Q: What is the significance of the TO-247AD (TO-3P) package designation for SF1606PTHC0G?

A: The TO-247AD (TO-3P) designation indicates a three-lead through-hole package with a metal mounting tab for thermal management. This package is mechanically and electrically compatible with standard TO-247-3 footprints. The SF1606PT uses the same TO-247AD (TO-3P) package, ensuring identical mechanical compatibility. The STTH61W04SW uses a TO-247 package designation, which is mechanically compatible with TO-247-3 specifications but may have minor dimensional variations. Verification of PCB footprint compatibility is recommended when substituting the STTH61W04SW.

Q: How do reverse recovery time differences affect circuit performance?

A: Reverse recovery time (trr) determines the duration required for a diode to transition from forward conduction to reverse blocking state. The SF1606PTHC0G and SF1606PT both specify 35 ns reverse recovery time, while the STTH61W04SW specifies 55 ns. In rectifier applications operating at line frequency (50/60 Hz), this difference is negligible. In switching power supplies or high-frequency converters operating above 100 kHz, the longer recovery time of the STTH61W04SW may increase switching losses and electromagnetic interference. Circuit design parameters should be evaluated to determine acceptable reverse recovery time limits.

Q: What inventory considerations apply to these substitute parts?

A: The SF1606PTHC0G has 749 pieces in stock. The SF1606PT has 2750 pieces in stock, providing significantly greater availability. The STTH61W04SW has 1434 pieces in stock. Inventory levels may influence component selection when lead time or bulk procurement requirements are factors in the design decision.

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