FES16GT/45 Equivalent & Substitute Parts

Part Overview

The FES16GT/45 is a general-purpose rectifier diode rated for 400 V DC reverse voltage and 16 A average rectified current in a Through Hole TO-220AC package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, equivalent substitute parts are necessary for ongoing design support and production continuity. Substitute diodes must maintain electrical compatibility within the specified voltage and current parameters while accommodating modern RoHS compliance requirements.

Key Parameters

Parameter	FES16GT/45 Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	16	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 16 A	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	10 @ 400 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	TO-220-2	—
Supplier Device Package	TO-220AC	—
Operating Temperature - Junction	-65 to 150	°C
Product Status	Obsolete	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the FES16GT/45 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 400 V
Current - Average Rectified (Io): Must equal or exceed 16 A
Speed Classification: Must be Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Must be Through Hole
Package / Case: Must be TO-220-2
Supplier Device Package: Must be TO-220AC

Secondary Compatibility Factors:

Reverse Recovery Time (trr): Lower values indicate improved performance
Forward Voltage (Vf): Lower values reduce power dissipation
Reverse Leakage Current: Lower values indicate better performance
Operating Temperature Range: Extended ranges provide design flexibility
Product Status: Active status ensures ongoing availability
RoHS Compliance: ROHS3 compliance aligns with modern regulatory requirements

Substitute parts are grouped into two categories: Direct Equivalents (identical electrical ratings) and Functional Alternatives (different current or voltage ratings that maintain circuit compatibility within specified operating conditions).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [ns]	Ir @ Vr [µA]	Tj (Max) [°C]	Product Status	RoHS Status
FES16GT/45	Vishay	400	16	1.3 @ 16 A	50	10 @ 400 V	150	Obsolete	Non-compliant
FES16GT-E3/45	Vishay	400	16	1.3 @ 16 A	50	10 @ 400 V	150	Active	ROHS3 Compliant
DPG10I400PA	IXYS	400	10	1.32 @ 10 A	45	1 @ 400 V	175	Active	ROHS3 Compliant
MUR1540G	onsemi	400	15	1.25 @ 15 A	60	10 @ 400 V	175	Active	ROHS3 Compliant
SDUR1040	SMC Diode Solutions	400	—	1.3 @ 10 A	45	10 @ 400 V	150	Active	ROHS3 Compliant
SDUR1540	SMC Diode Solutions	400	15	1.25 @ 15 A	45	10 @ 400 V	150	Active	ROHS3 Compliant
STTH15L06D	STMicroelectronics	600	15	1.55 @ 15 A	85	15 @ 600 V	175	Active	ROHS3 Compliant
STTH20R04D	STMicroelectronics	400	20	1.7 @ 20 A	45	20 @ 400 V	175	Active	ROHS3 Compliant
STTH30R04D	STMicroelectronics	400	30	1.45 @ 30 A	100	15 @ 400 V	175	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Substitute:

FES16GT-E3/45 is the direct equivalent to FES16GT/45. This part maintains identical electrical specifications (400 V, 16 A, 1.3 V forward voltage, 50 ns recovery time) while offering active product status and ROHS3 compliance. Selection of FES16GT-E3/45 eliminates the need for circuit re-evaluation and provides the highest level of form-fit-function compatibility.

Functional Alternatives for Current Derating:

MUR1540G (onsemi) and SDUR1540 (SMC Diode Solutions) are rated for 15 A at 400 V, providing 94% of the original 16 A specification. Both parts maintain fast recovery characteristics and TO-220AC packaging. MUR1540G offers extended operating temperature range (-65°C to 175°C) and lower forward voltage (1.25 V @ 15 A). SDUR1540 provides equivalent performance with REACH Affected status.

Functional Alternatives for Current Upgrading:

STTH20R04D (STMicroelectronics) and STTH30R04D (STMicroelectronics) provide 20 A and 30 A ratings respectively at 400 V, enabling designs requiring higher current capacity. Both maintain TO-220AC packaging and fast recovery characteristics. STTH30R04D offers the highest current rating (30 A) with extended operating temperature range to 175°C.

Voltage Upgrade Alternative:

STTH15L06D (STMicroelectronics) provides 600 V reverse voltage rating with 15 A current capacity. This part is suitable for applications requiring higher voltage margin while maintaining similar current handling. Forward voltage is elevated to 1.55 V @ 15 A due to the higher voltage rating.

Current Derating Alternative:

DPG10I400PA (IXYS) is rated for 10 A at 400 V, representing 63% of the original 16 A specification. This part offers superior reverse leakage characteristics (1 µA @ 400 V) and faster recovery time (45 ns). Selection requires circuit analysis to confirm adequate current margin.

All recommended substitutes are active products with ROHS3 compliance, ensuring regulatory alignment and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can FES16GT-E3/45 be used as a direct replacement for FES16GT/45?

A: Yes. FES16GT-E3/45 is electrically and mechanically identical to FES16GT/45, with identical voltage (400 V), current (16 A), forward voltage (1.3 V @ 16 A), and recovery time (50 ns) specifications. The primary differences are active product status and ROHS3 compliance. No circuit modifications are required.

Q: What is the difference between the substitute parts in terms of current rating?

A: Substitute parts are available in multiple current ratings: 10 A (DPG10I400PA), 15 A (MUR1540G, SDUR1540), 16 A (FES16GT-E3/45), 20 A (STTH20R04D), and 30 A (STTH30R04D). Selection depends on circuit current requirements. Parts rated below 16 A require verification that circuit current does not exceed the substitute part rating. Parts rated above 16 A provide additional current margin without electrical incompatibility.

Q: Are all substitute parts available in TO-220AC packaging?

A: Yes. All listed substitute parts are supplied in TO-220AC packaging (TO-220-2 case), ensuring mechanical compatibility with the original FES16GT/45 footprint and mounting requirements.

Q: What is the significance of the voltage rating difference in STTH15L06D?

A: STTH15L06D is rated for 600 V reverse voltage compared to the 400 V rating of FES16GT/45. This higher voltage rating provides additional safety margin in applications subject to voltage transients or overvoltage conditions. The 600 V rating does not create incompatibility with 400 V circuits; it simply provides enhanced voltage protection. Forward voltage is higher (1.55 V @ 15 A) due to the higher voltage design.

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

A: Reverse recovery time (trr) values range from 45 ns to 100 ns across substitute parts. Lower trr values reduce switching losses and electromagnetic interference in high-frequency applications. The original FES16GT/45 specifies 50 ns. Substitutes with lower trr (45 ns: DPG10I400PA, SDUR1540, STTH20R04D) provide improved performance. Substitutes with higher trr (60 ns: MUR1540G, 85 ns: STTH15L06D, 100 ns: STTH30R04D) are acceptable for applications where switching frequency is not critical.

Q: What does RoHS compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, eliminating lead and other restricted materials. All active substitute parts listed are ROHS3 compliant. The original FES16GT/45 is RoHS non-compliant. Selection of ROHS3-compliant substitutes ensures regulatory alignment for new designs and production.

Q: Can parts with lower current ratings be used if the circuit current is within their specification?

A: Yes. DPG10I400PA (10 A) and MUR1540G/SDUR1540 (15 A) can be used in circuits where the actual operating current does not exceed their rated values. Circuit analysis must confirm that peak and average currents remain within the substitute part's specification. This approach is valid for designs with inherent current limiting or where the original 16 A rating included design margin.

Q: What is the operating temperature range consideration for substitute selection?

A: The original FES16GT/45 specifies -65°C to 150°C junction temperature range. Most active substitutes extend the maximum temperature to 175°C, providing improved thermal margin. DPG10I400PA extends the minimum temperature to -55°C. Selection should verify that the substitute part's temperature range encompasses the application's thermal environment.

Q: Are there any compliance or regulatory differences between substitute parts?

A: REACH status varies: FES16GT-E3/45, DPG10I400PA, MUR1540G, STTH15L06D, STTH20R04D, and STTH30R04D are REACH Unaffected. SDUR1040 and SDUR1540 are REACH Affected. All parts are classified as EAR99 for export control purposes. Selection should verify compliance with applicable regulatory requirements for the target market.

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