IRFD310PBF N-Channel MOSFET 400V 350mA Equivalent & Substitute Parts

Part Overview

The IRFD310PBF is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 400V drain-to-source voltage with 350mA continuous drain current at 25°C. This device is housed in a 4-HVMDIP through-hole package and is designed for general-purpose switching applications requiring moderate voltage and current ratings. The IRFD310PBF maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Identification of equivalent and substitute parts is necessary to ensure design continuity, manage supply chain alternatives, and maintain performance specifications across production runs.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	400	V
Current - Continuous Drain (Id) @ 25°C	350	mA
Drive Voltage (Max Rds On)	10	V
Rds On (Max) @ Id, Vgs	3.6	Ohm @ 210mA, 10V
Vgs(th) (Max) @ Id	4	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	17	nC @ 10V
Vgs (Max)	±20	V
Input Capacitance (Ciss) (Max) @ Vds	170	pF @ 25V
Power Dissipation (Max)	1	W
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	4-DIP (0.300", 7.62mm)	—
Supplier Device Package	4-HVMDIP	—

Substitute Part Grouping Explanation

Substitution of the IRFD310PBF is determined by strict equivalence across all critical electrical and mechanical parameters. The primary substitute identified is the IRFD310, which shares identical electrical specifications including Vdss (400V), continuous drain current (350mA), on-resistance characteristics (3.6Ohm @ 210mA, 10V), gate threshold voltage (4V @ 250µA), and thermal operating range (-55°C to 150°C). Both devices utilize the same 4-HVMDIP through-hole package with 4-DIP (0.300", 7.62mm) physical dimensions, ensuring direct mechanical compatibility.

The substitution logic is based on the following key parameters:

Drain to Source Voltage (Vdss): 400V
Continuous Drain Current (Id): 350mA @ 25°C
On-Resistance (Rds On): 3.6Ohm @ 210mA, 10V
Gate Threshold Voltage (Vgs(th)): 4V @ 250µA
Maximum Gate Voltage (Vgs): ±20V
Package Type: 4-HVMDIP through-hole
Physical Dimensions: 4-DIP (0.300", 7.62mm)

Parameter Comparison

Parameter	IRFD310PBF (Main Part)	IRFD310 (Substitute)	Match Status
Manufacturer	Vishay Siliconix	Vishay Siliconix	Identical
FET Type	N-Channel	N-Channel	Identical
Technology	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)	Identical
Drain to Source Voltage (Vdss)	400V	400V	Identical
Current - Continuous Drain (Id) @ 25°C	350mA	350mA	Identical
Drive Voltage (Max Rds On)	10V	10V	Identical
Rds On (Max) @ Id, Vgs	3.6Ohm @ 210mA, 10V	3.6Ohm @ 210mA, 10V	Identical
Vgs(th) (Max) @ Id	4V @ 250µA	4V @ 250µA	Identical
Gate Charge (Qg) (Max) @ Vgs	17nC @ 10V	17nC @ 10V	Identical
Vgs (Max)	±20V	±20V	Identical
Input Capacitance (Ciss) (Max) @ Vds	170pF @ 25V	170pF @ 25V	Identical
Power Dissipation (Max)	1W	1W	Identical
Operating Temperature Range	-55°C to 150°C (TJ)	-55°C to 150°C (TJ)	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	Identical
Supplier Device Package	4-HVMDIP	4-HVMDIP	Identical
Product Status	Active	Obsolete	Different
RoHS Status	RoHS3 Compliant	RoHS non-compliant	Different

Engineering Selection Recommendations

The IRFD310PBF is the recommended primary selection for new designs and ongoing production due to its Active product status and full RoHS3 compliance. This part meets current regulatory requirements and ensures long-term supply chain stability.

The IRFD310 is electrically and mechanically equivalent to the IRFD310PBF across all specified parameters. However, the IRFD310 carries Obsolete product status and is RoHS non-compliant. The IRFD310 is suitable only for legacy system maintenance, repair, or applications where RoHS compliance is not required. Selection of the IRFD310 for new designs is not recommended due to its obsolete status and regulatory non-compliance.

For applications requiring the 400V, 350mA N-Channel MOSFET in 4-HVMDIP through-hole packaging, the IRFD310PBF provides full electrical equivalence with current product support and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the IRFD310 be used as a direct replacement for the IRFD310PBF?

A: The IRFD310 is electrically and mechanically equivalent to the IRFD310PBF. Both devices share identical electrical specifications (400V Vdss, 350mA Id, 3.6Ohm Rds On, 4V Vgs(th)) and use the same 4-HVMDIP through-hole package. However, the IRFD310 is Obsolete and RoHS non-compliant, whereas the IRFD310PBF is Active and RoHS3 compliant. Direct substitution is possible from an electrical and mechanical standpoint, but product status and compliance differences must be considered for design and regulatory requirements.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility for the IRFD310PBF is determined by the following parameters: Drain to Source Voltage (400V), Continuous Drain Current (350mA @ 25°C), On-Resistance (3.6Ohm @ 210mA, 10V), Gate Threshold Voltage (4V @ 250µA), Maximum Gate Voltage (±20V), Operating Temperature Range (-55°C to 150°C), and Package Type (4-HVMDIP through-hole with 4-DIP 0.300" dimensions). Any substitute must match all these parameters exactly.

Q: Are there any package or pinout differences between the IRFD310PBF and IRFD310?

A: No. Both the IRFD310PBF and IRFD310 use the identical 4-HVMDIP through-hole package with 4-DIP (0.300", 7.62mm) physical dimensions. Pinout and mechanical compatibility are identical, allowing direct board-level substitution without layout modifications.

Q: What is the difference between the IRFD310PBF and IRFD310 in terms of product status?

A: The IRFD310PBF maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The IRFD310 is classified as Obsolete and is RoHS non-compliant. For new designs and production requiring regulatory compliance, the IRFD310PBF is the appropriate selection.

Q: Can the IRFD310PBF be used in applications previously designed with the IRFD310?

A: Yes. The IRFD310PBF is electrically and mechanically equivalent to the IRFD310 across all specified parameters. It can be used as a direct replacement in legacy applications. The IRFD310PBF provides the added benefit of Active product status and RoHS3 compliance, making it suitable for both legacy and new applications.

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