IRFR310TRL Equivalent & Substitute Parts

Part Overview

The IRFR310TRL is an N-Channel 400V 1.7A MOSFET manufactured by Vishay Siliconix in a Surface Mount DPAK package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The IRFR310TRL serves applications requiring moderate voltage and current handling in compact surface mount form factors, with a maximum drain-source voltage of 400V and continuous drain current of 1.7A at 25°C case temperature.

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
Vgs (Max)	±20	V
Input Capacitance (Ciss) (Max) @ Vds	170	pF @ 25V
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	—

Substitute Part Grouping Explanation

Substitute parts for the IRFR310TRL are grouped into two categories based on substitution criteria:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 400V Vdss, 1.7A continuous drain current, 3.6 Ohm Rds(on), 4V Vgs(th), 12nC gate charge, ±20V Vgs maximum, 170pF input capacitance, and identical operating temperature range (-55°C to 150°C). These parts are direct replacements with no circuit redesign required. Parametric equivalents include IRFR310TRLPBF, IRFR310TRPBF, and IRFR310TRPBF-BE3, all manufactured by Vishay Siliconix with identical base product number IRFR310.

Manufacturer Recommended Alternatives provide functional substitution with relaxed electrical parameters that remain within acceptable operating margins for most applications. These alternatives maintain the 400V Vdss rating and Surface Mount DPAK package form factor but offer enhanced current handling (2.0A to 2.6A), improved gate charge characteristics, and higher power dissipation ratings. Manufacturer recommended alternatives include AOD3N40 (Alpha & Omega Semiconductor), FDD3N40TM (onsemi), and TN2640K4-G (Microchip Technology).

Key parameters determining substitution eligibility:

Drain to Source Voltage (Vdss): 400V minimum
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum
FET Type: N-Channel MOSFET

Parameter Comparison

Parameter	IRFR310TRL	IRFR310TRLPBF	IRFR310TRPBF	IRFR310TRPBF-BE3	AOD3N40	FDD3N40TM	TN2640K4-G
Manufacturer	Vishay Siliconix	Vishay Siliconix	Vishay Siliconix	Vishay Siliconix	Alpha & Omega Semiconductor	onsemi	Microchip Technology
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Vdss (V)	400	400	400	400	400	400	400
Id @ 25°C (A)	1.7	1.7	1.7	1.7	2.6	2.0	0.5
Rds On (Max) @ 1A, 10V (Ohm)	3.6	3.6	3.6	3.6	3.1	3.4	5.0
Vgs(th) (Max) @ 250µA (V)	4	4	4	4	4.5	5	2
Gate Charge (Qg) @ 10V (nC)	12	12	12	12	5.1	6	—
Vgs (Max) (V)	±20	±20	±20	±20	±30	±30	±20
Ciss @ 25V (pF)	170	170	170	170	225	225	225
Power Dissipation (Max) (W)	2.5 (Ta), 25 (Tc)	2.5 (Ta), 25 (Tc)	2.5 (Ta), 25 (Tc)	2.5 (Ta), 25 (Tc)	50 (Tc)	30 (Tc)	2.5 (Ta)
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-50 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	TO-252-3, DPAK	TO-252-3, DPAK
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification Required):

Select IRFR310TRLPBF, IRFR310TRPBF, or IRFR310TRPBF-BE3 when exact electrical parameter matching is required. All three parts maintain identical specifications to the IRFR310TRL across voltage, current, gate charge, and capacitance parameters. These parts are manufactured by Vishay Siliconix and carry ROHS3 compliance, addressing the RoHS non-compliance status of the obsolete IRFR310TRL. IRFR310TRPBF offers the highest inventory availability at 51,988 pieces. IRFR310TRLPBF provides 29,804 pieces in Cut Tape and Digi-Reel packaging. IRFR310TRPBF-BE3 is available in Tape & Reel format with 2,861 pieces in stock and carries REACH Affected status.

For Enhanced Performance Applications:

AOD3N40 (Alpha & Omega Semiconductor) provides 2.6A continuous drain current with improved Rds(on) of 3.1 Ohm and reduced gate charge of 5.1nC, enabling higher current handling and faster switching characteristics. Power dissipation increases to 50W at case temperature. This part is suitable for applications requiring higher current margins or improved thermal performance.

FDD3N40TM (onsemi UniFET™ series) offers 2.0A continuous drain current with 3.4 Ohm Rds(on) and 6nC gate charge, providing moderate performance enhancement over the IRFR310TRL. Power dissipation reaches 30W at case temperature. This part maintains the -55°C to 150°C operating temperature range and is available in 19,769 pieces.

For Current-Limited Applications:

TN2640K4-G (Microchip Technology) is suitable only for applications with reduced current requirements, providing 500mA continuous drain current. This part carries Moisture Sensitivity Level 3 (168 hours), requiring controlled storage and handling conditions. Use this part only when current requirements do not exceed 500mA.

Compliance Considerations:

All active substitute parts carry ROHS3 compliance, addressing regulatory requirements for new designs. The original IRFR310TRL is RoHS non-compliant. IRFR310TRPBF-BE3 carries REACH Affected status, requiring compliance verification for applications subject to REACH regulations. All parts maintain EAR99 export classification and identical HTSUS code 8541.29.0095.

Frequently Asked Questions (FAQ)

Q: Can IRFR310TRLPBF, IRFR310TRPBF, and IRFR310TRPBF-BE3 be used interchangeably with IRFR310TRL?

A: Yes. These three parts are parametric equivalents with identical electrical specifications. The primary differences are product status (all active versus obsolete), RoHS compliance (all ROHS3 compliant), and packaging format (Cut Tape, Digi-Reel, or Tape & Reel). No circuit modification is required for substitution.

Q: What is the difference between IRFR310TRPBF and IRFR310TRLPBF?

A: Both parts are parametric equivalents with identical electrical parameters. IRFR310TRPBF is available in Cut Tape and Digi-Reel packaging with 51,988 pieces in stock. IRFR310TRLPBF is available in Cut Tape and Digi-Reel packaging with 29,804 pieces in stock. Selection depends on packaging preference and inventory availability.

Q: Can AOD3N40 replace IRFR310TRL in all applications?

A: AOD3N40 provides functional substitution with enhanced specifications. The 2.6A continuous drain current exceeds the IRFR310TRL requirement of 1.7A, and the 3.1 Ohm Rds(on) is lower than the 3.6 Ohm specification. These improvements are compatible with applications designed for IRFR310TRL. However, the higher gate charge (5.1nC versus 12nC) and increased input capacitance (225pF versus 170pF) may affect switching speed in gate-drive-limited circuits.

Q: What is the significance of Moisture Sensitivity Level (MSL) differences?

A: IRFR310TRL, IRFR310TRLPBF, IRFR310TRPBF, and IRFR310TRPBF-BE3 carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. TN2640K4-G carries MSL 3 (168 hours), requiring storage in dry conditions and limiting shelf life after moisture exposure. MSL 3 parts require controlled handling and reflow within 168 hours of moisture exposure.

Q: Is the TO-252-3 DPAK package identical across all substitute parts?

A: Yes. All substitute parts use the TO-252-3 DPAK (2 Leads + Tab) package, designated SC-63. Physical dimensions and pin configurations are identical, enabling direct PCB footprint compatibility without layout modification.

Q: Why does TN2640K4-G have lower continuous drain current (500mA)?

A: TN2640K4-G is a lower-current variant designed for different application requirements. This part is suitable only for circuits where maximum drain current does not exceed 500mA. For applications requiring 1.7A or higher, this part is not appropriate.

Q: What does ROHS3 compliance mean for the substitute parts?

A: ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive 3, restricting lead, cadmium, mercury, hexavalent chromium, and specific brominated flame retardants. All active substitute parts carry ROHS3 compliance, making them suitable for applications with RoHS regulatory requirements. The original IRFR310TRL is RoHS non-compliant.

Q: Can FDD3N40TM be used in high-frequency switching applications?

A: FDD3N40TM carries reduced gate charge (6nC versus 12nC) and lower input capacitance (225pF versus 170pF) compared to IRFR310TRL, enabling faster switching characteristics. The 2.0A continuous drain current and 3.4 Ohm Rds(on) provide performance suitable for moderate-frequency switching applications. Circuit validation is required to confirm compatibility with specific switching frequency requirements.

Q: What inventory considerations apply to substitute part selection?

A: IRFR310TRPBF offers the highest availability at 51,988 pieces. IRFR310TRLPBF provides 29,804 pieces. AOD3N40 and FDD3N40TM each provide approximately 20,000 pieces. IRFR310TRPBF-BE3 offers 2,861 pieces. TN2640K4-G provides 20,495 pieces. Inventory levels should be verified with suppliers for long-term procurement planning.

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