IRFR310TRLPBF Equivalent & Substitute Parts

Part Overview

The IRFR310TRLPBF is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 400V drain-to-source voltage with 1.7A continuous drain current at 25°C. This device is packaged in a Surface Mount DPAK (TO-252-3) configuration and is designed for general-purpose switching applications requiring moderate voltage and current handling. The part maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the critical parameters that define MOSFET functionality: drain-to-source voltage rating, continuous drain current capability, on-state resistance, gate threshold voltage, and surface mount package compatibility.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	400	V
Current - Continuous Drain (Id) @ 25°C	1.7	A (Tc)
Rds On (Max) @ Id, Vgs	3.6	Ohm @ 1A, 10V
Vgs(th) (Max) @ Id	4	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	12	nC @ 10V
Power Dissipation (Max)	2.5 (Ta), 25 (Tc)	W
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of N-Channel MOSFETs is determined by equivalence across the following critical parameters:

Voltage Rating Equivalence: All substitute parts maintain the 400V Vdss rating, ensuring compatibility with circuit voltage specifications.

Current Handling Capability: The IRFR310TRLPBF is rated for 1.7A continuous drain current. Substitute parts must meet or exceed this current specification to ensure safe operation under design load conditions.

On-State Resistance (Rds On): The 3.6 Ohm maximum on-state resistance at 1A, 10V gate-source voltage is a critical switching parameter. Substitute parts with equal or lower Rds On values maintain equivalent or improved switching efficiency.

Gate Threshold Voltage (Vgs(th)): The 4V maximum threshold voltage ensures consistent gate drive requirements and switching behavior across temperature ranges.

Package Compatibility: All substitute parts utilize the TO-252-3 DPAK surface mount package, ensuring mechanical and thermal interface compatibility with existing PCB layouts.

Temperature Operating Range: All parts operate across -55°C to 150°C junction temperature, maintaining thermal performance consistency.

Compliance Status: All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and moisture handling consistency.

Parameter Comparison

Parameter	IRFR310TRLPBF	IRFR310TRPBF	IRFR310TRPBF-BE3	FDD3N40TM	TN2640K4-G
Manufacturer	Vishay Siliconix	Vishay Siliconix	Vishay Siliconix	onsemi	Microchip Technology
FET Type	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel
Vdss (V)	400	400	400	400	400
Id @ 25°C (A)	1.7 (Tc)	1.7 (Tc)	1.7 (Tc)	2.0 (Tc)	0.5 (Tj)
Rds On (Max) @ 1A, 10V (Ohm)	3.6	3.6	3.6	3.4	5.0
Vgs(th) (Max) @ 250µA (V)	4	4	4	5	2
Gate Charge (Qg) @ 10V (nC)	12	12	12	6	—
Vgs (Max) (±V)	20	20	20	30	20
Input Capacitance (Ciss) @ 25V (pF)	170	170	170	225	225
Power Dissipation (Max) (W)	2.5 (Ta), 25 (Tc)	2.5 (Ta), 25 (Tc)	2.5 (Ta), 25 (Tc)	30 (Tc)	2.5 (Ta)
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

IRFR310TRPBF (Vishay Siliconix): This part is a parametric equivalent to the IRFR310TRLPBF, maintaining identical electrical specifications and package configuration. Both parts are manufactured by Vishay Siliconix and carry Active product status with ROHS3 compliance and MSL 1 rating. Selection between these two variants is determined by packaging format availability: IRFR310TRPBF is supplied in Cut Tape (CT) & Digi-Reel® format with higher inventory (51,988 pcs), while IRFR310TRLPBF is supplied in the same format with lower inventory (29,804 pcs).

IRFR310TRPBF-BE3 (Vishay Siliconix): This part maintains identical electrical specifications to the IRFR310TRLPBF but is supplied in Tape & Reel (TR) packaging format. The part carries REACH Affected status, distinguishing it from the base IRFR310TRPBF variant. Inventory availability is lower (2,861 pcs). Selection of this variant is appropriate when Tape & Reel packaging is required for automated assembly processes.

FDD3N40TM (onsemi): This part is a manufacturer-recommended substitute offering enhanced electrical performance. The FDD3N40TM provides 2.0A continuous drain current (compared to 1.7A), lower on-state resistance of 3.4 Ohm (compared to 3.6 Ohm), and higher power dissipation capability of 30W at Tc (compared to 25W). The part operates with a higher gate threshold voltage of 5V and higher maximum gate voltage of ±30V. Gate charge is reduced to 6 nC, improving switching speed. Input capacitance increases to 225 pF. The FDD3N40TM is part of the onsemi UniFET™ series and carries REACH Unaffected status. This substitute is appropriate for applications requiring improved current handling or reduced switching losses.

TN2640K4-G (Microchip Technology): This part is a manufacturer-recommended substitute with reduced current rating of 500mA (compared to 1.7A) and higher on-state resistance of 5.0 Ohm (compared to 3.6 Ohm). The gate threshold voltage is lower at 2V, and input capacitance is higher at 225 pF. Power dissipation is limited to 2.5W at Ta. Moisture sensitivity level is MSL 3 (168 Hours), requiring more stringent handling compared to MSL 1 parts. This substitute is appropriate only for applications with reduced current requirements below 500mA and where the higher on-state resistance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can IRFR310TRPBF be used as a direct replacement for IRFR310TRLPBF?

A: Yes. Both parts are parametric equivalents manufactured by Vishay Siliconix with identical electrical specifications, operating temperature range, and DPAK package configuration. The difference is packaging format: IRFR310TRPBF is supplied in Cut Tape & Digi-Reel® format, while IRFR310TRLPBF is also supplied in Cut Tape & Digi-Reel® format. Both maintain ROHS3 compliance and MSL 1 rating.

Q: What is the difference between IRFR310TRPBF and IRFR310TRPBF-BE3?

A: Both parts maintain identical electrical specifications and DPAK package compatibility. The primary difference is packaging format: IRFR310TRPBF is supplied in Cut Tape & Digi-Reel® format, while IRFR310TRPBF-BE3 is supplied in Tape & Reel (TR) format. Additionally, IRFR310TRPBF-BE3 carries REACH Affected status, whereas IRFR310TRPBF has undefined REACH status. Selection depends on assembly process requirements and regulatory compliance needs.

Q: Can FDD3N40TM replace IRFR310TRLPBF in all applications?

A: FDD3N40TM provides enhanced electrical performance with higher current rating (2.0A vs. 1.7A), lower on-state resistance (3.4 Ohm vs. 3.6 Ohm), and improved power dissipation (30W vs. 25W at Tc). The higher gate threshold voltage (5V vs. 4V) and increased maximum gate voltage (±30V vs. ±20V) may affect gate drive circuit design. The reduced gate charge (6 nC vs. 12 nC) improves switching speed. FDD3N40TM is suitable for applications where these enhanced specifications provide benefit or where the original part is unavailable.

Q: Is TN2640K4-G suitable as a substitute for IRFR310TRLPBF?

A: TN2640K4-G is not suitable for direct replacement in applications requiring the full 1.7A continuous drain current rating. This part is rated for only 500mA continuous drain current and exhibits higher on-state resistance (5.0 Ohm vs. 3.6 Ohm). TN2640K4-G is appropriate only for applications with reduced current requirements below 500mA where the higher on-state resistance is acceptable. Additionally, TN2640K4-G carries MSL 3 (168 Hours) moisture sensitivity, requiring more stringent handling compared to MSL 1 parts.

Q: Are all substitute parts compatible with existing DPAK PCB layouts?

A: Yes. All substitute parts utilize the TO-252-3 DPAK (2 Leads + Tab) surface mount package configuration, ensuring mechanical and thermal interface compatibility with existing PCB layouts designed for IRFR310TRLPBF.

Q: What is the significance of MSL rating differences between substitute parts?

A: MSL 1 (Unlimited) rating indicates the part has unlimited shelf life and does not require moisture baking before soldering. MSL 3 (168 Hours) rating, as specified for TN2640K4-G, indicates the part must be used within 168 hours of package opening and may require moisture baking before soldering to prevent solder joint defects. This affects supply chain handling, storage procedures, and assembly process requirements.

Q: Do all substitute parts maintain the same operating temperature range?

A: Yes. All substitute parts operate across -55°C to 150°C junction temperature range, maintaining thermal performance consistency with the IRFR310TRLPBF across the full specified operating envelope.

Q: What compliance certifications are maintained across all substitute parts?

A: All substitute parts maintain ROHS3 compliance and EAR99 export classification. MSL ratings vary: IRFR310TRPBF, IRFR310TRPBF-BE3, and FDD3N40TM carry MSL 1 (Unlimited), while TN2640K4-G carries MSL 3 (168 Hours). REACH status varies: IRFR310TRPBF has undefined status, IRFR310TRPBF-BE3 is REACH Affected, FDD3N40TM is REACH Unaffected, and TN2640K4-G is REACH Unaffected.

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