IRL1404ZSTRL N-Channel 40V 75A MOSFET Equivalent & Substitute Parts

Part Overview

The IRL1404ZSTRL is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 40V drain-to-source voltage and 75A continuous drain current in a D2PAK surface mount package. This device is classified as Obsolete, making identification of equivalent and substitute parts essential for ongoing production support and design continuity. The part operates across a wide temperature range of -55°C to 175°C and dissipates up to 230W at the case temperature, making it suitable for high-current switching applications in power management circuits.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	40	V
Continuous Drain Current (Id) @ 25°C	75	A (Tc)
On-Resistance (Rds On Max) @ 75A, 10V	3.1	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.7	V
Gate Charge (Qg) @ 5V	110	nC
Power Dissipation (Max)	230	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount

Substitute Part Grouping Explanation

Substitution of the IRL1404ZSTRL is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 40V
Continuous Drain Current (Id): Must support 75A or higher at case temperature
On-Resistance (Rds On): Must not exceed 3.1mOhm at rated current and gate voltage to maintain thermal performance
Package Type: Must be D2PAK (TO-263-3) for mechanical and thermal compatibility
Operating Temperature Range: Must span -55°C to 175°C minimum
FET Type: N-Channel MOSFET technology only

Substitute Categories:

Parametric Equivalent: IRL1404ZSTRLPBF matches all electrical specifications identically and differs only in packaging format (Tape & Reel versus bulk). This part is Active status and RoHS3 compliant.

Functional Equivalents with Enhanced Specifications: STB270N4F3 and STB120N4LF6 provide equal or superior electrical performance within the same package envelope. These parts exceed the minimum current and power dissipation requirements while maintaining voltage and temperature compatibility.

Alternative Equivalent: AOB240L provides functional equivalence in the same package with comparable electrical characteristics, though with different gate charge and input capacitance specifications.

Parameter Comparison

Parameter	IRL1404ZSTRL (Main)	IRL1404ZSTRLPBF	STB120N4LF6	STB270N4F3	AOB240L
Manufacturer	Infineon	Infineon	STMicroelectronics	STMicroelectronics	Alpha & Omega
Vdss (V)	40	40	40	40	40
Id @ 25°C (A, Tc)	75	75	80	160	105
Rds On Max @ 10V (mOhm)	3.1 @ 75A	3.1 @ 75A	4.0 @ 40A	2.5 @ 80A	2.6 @ 20A
Vgs(th) @ 250µA (V)	2.7	2.7	3.0	4.0	2.2
Qg @ Vgs (nC)	110 @ 5V	110 @ 5V	80 @ 10V	150 @ 10V	72 @ 10V
Power Dissipation Max (W, Tc)	230	230	110	330	176
Operating Temp Range (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	D2PAK	D2PAK	D2PAK	D2PAK	D2PAK
Product Status	Obsolete	Active	Active	Active	Not For New Designs
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

First Priority: IRL1404ZSTRLPBF

IRL1404ZSTRLPBF is the direct parametric equivalent of the obsolete IRL1404ZSTRL. It provides identical electrical specifications and D2PAK packaging. The only difference is the packaging format (Tape & Reel versus bulk). This part carries Active product status and is RoHS3 compliant, making it the preferred choice for design continuity and regulatory compliance. Inventory availability is 4510 pieces.

Second Priority: STB270N4F3

STB270N4F3 manufactured by STMicroelectronics exceeds the performance envelope of the IRL1404ZSTRL with 160A continuous drain current and 330W power dissipation capability. It maintains the 40V voltage rating and D2PAK package compatibility. The lower on-resistance of 2.5mOhm at 80A improves thermal efficiency. This part is Active status, AEC-Q101 automotive qualified, and RoHS3 compliant. Inventory availability is 7230 pieces.

Third Priority: STB120N4LF6

STB120N4LF6 from STMicroelectronics provides 80A continuous drain current, slightly exceeding the IRL1404ZSTRL specification. It maintains 40V voltage rating and D2PAK package compatibility. This part is Active status, AEC-Q101 automotive qualified, and RoHS3 compliant. Inventory availability is 15465 pieces.

Fourth Priority: AOB240L

AOB240L from Alpha & Omega Semiconductor provides functional equivalence with 105A continuous drain current and 176W power dissipation. It maintains 40V voltage rating and D2PAK package compatibility. However, this part carries "Not For New Designs" status, limiting its suitability for new production. RoHS3 compliance is confirmed. Inventory availability is 10326 pieces.

Frequently Asked Questions (FAQ)

Q: Can IRL1404ZSTRLPBF directly replace IRL1404ZSTRL in existing designs?

A: Yes. IRL1404ZSTRLPBF is a parametric equivalent with identical electrical specifications. The only difference is packaging format (Tape & Reel). No circuit modifications are required. Both parts use D2PAK surface mount package with identical pinout and thermal characteristics.

Q: What is the key difference between IRL1404ZSTRL and STB270N4F3?

A: STB270N4F3 provides higher current capacity (160A versus 75A) and greater power dissipation (330W versus 230W). Both maintain 40V voltage rating and D2PAK packaging. STB270N4F3 has lower on-resistance (2.5mOhm versus 3.1mOhm), resulting in improved thermal efficiency. STB270N4F3 is suitable for applications requiring higher current handling.

Q: Are all substitute parts RoHS compliant?

A: IRL1404ZSTRLPBF, STB120N4LF6, and STB270N4F3 are RoHS3 compliant. AOB240L is also RoHS3 compliant. The original IRL1404ZSTRL is RoHS non-compliant due to its obsolete status.

Q: Can I use STB120N4LF6 or STB270N4F3 in place of IRL1404ZSTRL?

A: Yes. Both parts maintain the 40V voltage rating and D2PAK package compatibility. Both exceed the 75A current specification and provide superior thermal performance. Circuit operation remains unchanged. These parts are suitable for direct substitution in existing designs.

Q: What is the significance of the D2PAK package designation?

A: D2PAK (also designated TO-263-3) is a surface mount package with two leads plus a thermal tab. All substitute parts use this identical package, ensuring mechanical compatibility with existing PCB layouts and thermal management designs. Package dimensions and pinout are standardized across all listed parts.

Q: Why is AOB240L listed as "Not For New Designs"?

A: AOB240L carries a "Not For New Designs" product status designation, indicating that the manufacturer recommends against using this part in new product development. While it provides functional equivalence, IRL1404ZSTRLPBF, STB120N4LF6, or STB270N4F3 are preferred for new designs due to their Active status and long-term availability assurance.

Q: What is the impact of different gate charge specifications?

A: Gate charge (Qg) affects gate drive circuit design and switching speed. IRL1404ZSTRL specifies 110nC at 5V. STB270N4F3 specifies 150nC at 10V, while STB120N4LF6 specifies 80nC at 10V. These differences require gate drive circuits to supply appropriate charge levels. Higher gate charge may require stronger gate drive capability but does not prevent substitution in properly designed circuits.

Q: Are automotive qualifications required for my application?

A: STB120N4LF6 and STB270N4F3 carry AEC-Q101 automotive qualification. If your application requires automotive-grade components, these parts are suitable. IRL1404ZSTRLPBF and AOB240L do not carry automotive qualification but are suitable for industrial and consumer applications.

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