FDP5680 N-Channel MOSFET 60V 40A Equivalent & Substitute Parts

Part Overview

The FDP5680 is an N-Channel MOSFET manufactured by onsemi, rated for 60V drain-to-source voltage with 40A continuous drain current at 25°C. This device is packaged in a TO-220-3 through-hole configuration and is part of the PowerTrench® series. The FDP5680 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substitute parts must maintain compatibility across critical electrical parameters including drain-to-source voltage rating, continuous drain current capability, gate threshold voltage, and on-state resistance characteristics. All substitute candidates are active products with current manufacturing status and full availability.

Key Parameters

Parameter	FDP5680	Unit
Drain to Source Voltage (Vdss)	60	V
Current - Continuous Drain (Id) @ 25°C	40	A (Tc)
Rds On (Max) @ Id, Vgs	20 mOhm @ 20A, 10V	mOhm
Vgs(th) (Max) @ Id	4	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	46	nC @ 10V
Power Dissipation (Max)	65	W (Tc)
Operating Temperature Range	-65 to 175	°C (TJ)
Package / Case	TO-220-3	Through Hole
Vgs (Max)	±20	V
Input Capacitance (Ciss) (Max) @ Vds	1850	pF @ 25V

Substitute Part Grouping Explanation

Substitution eligibility for the FDP5680 is determined by the following critical parameters:

Mandatory Matching Criteria:

Drain to Source Voltage (Vdss): 60V minimum
Package / Case: TO-220-3 through-hole configuration
FET Type: N-Channel
Technology: MOSFET (Metal Oxide)
Gate Voltage Rating (Vgs Max): ±20V

Performance Compatibility Criteria:

Continuous Drain Current (Id): Equal to or greater than 40A at 25°C
On-State Resistance (Rds On): Equal to or lower than 20 mOhm at specified conditions
Gate Threshold Voltage (Vgs(th)): Within acceptable switching characteristics
Power Dissipation: Sufficient thermal capability for application requirements

All three substitute parts (STP45NF06, AOT2618L, STP55NF06) meet the mandatory matching criteria and provide electrical performance within acceptable ranges for direct substitution in applications designed for the FDP5680.

Parameter Comparison

Parameter	FDP5680 (onsemi)	STP45NF06 (STMicroelectronics)	STP55NF06 (STMicroelectronics)	AOT2618L (Alpha & Omega)	Unit
Drain to Source Voltage (Vdss)	60	60	60	60	V
Current - Continuous Drain (Id) @ 25°C	40 (Tc)	38 (Tc)	50 (Tc)	23 (Tc)	A
Rds On (Max) @ Id, Vgs	20 @ 20A, 10V	28 @ 19A, 10V	18 @ 27.5A, 10V	19 @ 20A, 10V	mOhm
Vgs(th) (Max) @ Id	4 @ 250µA	4 @ 250µA	4 @ 250µA	2.5 @ 250µA	V
Gate Charge (Qg) (Max) @ Vgs	46 @ 10V	58 @ 10V	60 @ 10V	20 @ 10V	nC
Power Dissipation (Max)	65 (Tc)	80 (Tc)	110 (Tc)	41.5 (Tc)	W
Operating Temperature Range	-65 to 175	-55 to 175	-55 to 175	-55 to 175	°C (TJ)
Vgs (Max)	±20	±20	±20	±20	V
Input Capacitance (Ciss) (Max) @ Vds	1850 @ 25V	980 @ 25V	1300 @ 25V	950 @ 30V	pF
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	Through Hole
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

STP55NF06 (STMicroelectronics)

The STP55NF06 provides the closest electrical performance match to the FDP5680. This device exceeds the 40A continuous drain current requirement with a 50A rating and delivers superior on-state resistance of 18 mOhm at 27.5A, 10V. Power dissipation capability of 110W (Tc) exceeds the FDP5680 specification of 65W. The STP55NF06 is RoHS3 compliant and carries active product status with 155,400 units in stock. Operating temperature range of -55°C to 175°C is compatible with most applications designed for the FDP5680, with the exception of designs requiring operation below -55°C.

STP45NF06 (STMicroelectronics)

The STP45NF06 provides a near-equivalent alternative with 38A continuous drain current and 80W power dissipation. On-state resistance of 28 mOhm at 19A, 10V is slightly higher than the FDP5680 but remains within acceptable substitution parameters. This device is RoHS3 compliant with active product status and 8,822 units in stock. Gate charge of 58 nC is moderately elevated compared to the FDP5680.

AOT2618L (Alpha & Omega Semiconductor Inc.)

The AOT2618L is suitable for applications where continuous drain current requirements do not exceed 23A at 25°C. This device delivers the lowest gate charge at 20 nC and the lowest input capacitance at 950 pF, making it advantageous for high-frequency switching applications. On-state resistance of 19 mOhm at 20A, 10V is superior to the FDP5680. The AOT2618L is RoHS3 compliant with active product status and 4,300 units in stock. Power dissipation of 41.5W (Tc) is lower than the FDP5680, limiting thermal headroom in high-power applications.

Compliance and Availability:

All three substitute parts are REACH Unaffected and classified under ECCN EAR99 with HTSUS code 8541.29.0095, matching the FDP5680 regulatory classification. All substitutes carry Moisture Sensitivity Level 1 (Unlimited). Current manufacturing status and active inventory ensure long-term availability for production and replacement applications.

Frequently Asked Questions (FAQ)

Q: Can the STP55NF06 directly replace the FDP5680 in all applications?

A: The STP55NF06 is electrically compatible with the FDP5680 across all critical parameters including voltage rating, current capability, and package configuration. The primary consideration is the operating temperature minimum of -55°C versus the FDP5680's -65°C. Applications requiring operation below -55°C require design verification.

Q: What is the primary difference between the STP45NF06 and STP55NF06?

A: The STP55NF06 provides higher continuous drain current (50A versus 38A) and superior on-state resistance (18 mOhm versus 28 mOhm). The STP55NF06 is recommended for applications approaching or exceeding 40A continuous current. Both devices share identical voltage ratings and package configuration.

Q: Is the AOT2618L suitable for high-current applications?

A: The AOT2618L is rated for 23A continuous drain current at 25°C, which is below the FDP5680's 40A specification. This device is suitable for applications with continuous drain current requirements not exceeding 23A. For applications requiring the full 40A capability, the STP55NF06 or STP45NF06 are recommended.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts (STP45NF06, STP55NF06, and AOT2618L) are RoHS3 compliant. The FDP5680 does not specify RoHS status in the provided data.

Q: What is the significance of gate charge differences between these devices?

A: Gate charge (Qg) affects switching speed and driver circuit requirements. The FDP5680 specifies 46 nC, the STP45NF06 specifies 58 nC, the STP55NF06 specifies 60 nC, and the AOT2618L specifies 20 nC. Higher gate charge requires more driver current and increases switching losses. The AOT2618L's lower gate charge provides faster switching characteristics, while the STMicroelectronics devices have moderately elevated gate charge.

Q: Can these devices be used interchangeably in PCB designs?

A: All substitute parts use the TO-220-3 through-hole package, enabling direct pin-compatible substitution on existing PCBs. No layout modifications are required. However, thermal management design should account for differences in power dissipation ratings and on-state resistance characteristics.

Q: What inventory considerations apply to these substitutes?

A: The STP55NF06 has the highest inventory availability with 155,400 units in stock, followed by the FDP5680 with 18,600 units (obsolete status), STP45NF06 with 8,822 units, and AOT2618L with 4,300 units. For long-term production programs, the STP55NF06 offers the most secure supply chain position.

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