RFD12N06RLE Equivalent & Substitute Parts

Part Overview

The RFD12N06RLE is an N-Channel 60V 18A MOSFET manufactured by onsemi in the UltraFET™ series, housed in a Through Hole I-PAK (TO-251-3) package. This device is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The RFD12N06RLE delivers 40W maximum power dissipation and operates across the industrial temperature range of -55°C to 175°C.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	60	V
Current - Continuous Drain (Id) @ 25°C	18	A (Tc)
Rds On (Max) @ Id, Vgs	63	mOhm @ 18A, 10V
Power Dissipation (Max)	40	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	—

Substitute Part Grouping Explanation

Substitution of the RFD12N06RLE is determined by the following critical parameters:

Primary Substitution Criteria:

FET Type: N-Channel topology
Drain to Source Voltage (Vdss): Minimum 60V rating
Current - Continuous Drain (Id): Minimum 18A at 25°C (Tc)
Mounting Type: Through Hole configuration
Package Compatibility: TO-251-3 or equivalent I-PAK footprint

Secondary Compatibility Parameters:

Operating Temperature Range: -55°C to 175°C (TJ)
Rds On characteristics at specified gate voltage
Gate Charge and Input Capacitance within acceptable ranges
Moisture Sensitivity Level: 1 (Unlimited)

The substitute parts listed below meet or exceed the primary substitution criteria and maintain compatibility with the original application requirements.

Parameter Comparison

Parameter	RFD12N06RLE (onsemi)	IRLU024NPBF (Infineon)	STD12NF06L-1 (STMicroelectronics)	AOI444 (Alpha & Omega)
FET Type	N-Channel	N-Channel	N-Channel	N-Channel
Vdss (V)	60	55	60	60
Id @ 25°C (A, Tc)	18	17	12	12
Rds On (Max) (mOhm)	63 @ 18A, 10V	65 @ 10A, 10V	100 @ 6A, 10V	60 @ 12A, 10V
Power Dissipation (Max) (W, Tc)	40	45	42.8	20
Operating Temperature (°C, TJ)	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Stub Leads, IPak
Vgs (Max) (±V)	±16	±16	±16	±20
Gate Charge (Qg) (Max) (nC)	15 @ 10V	15 @ 5V	10 @ 5V	10 @ 10V
Input Capacitance (Ciss) (Max) (pF)	485 @ 25V	480 @ 25V	350 @ 25V	540 @ 30V
Product Status	Obsolete	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

IRLU024NPBF (Infineon Technologies)

The IRLU024NPBF is the primary substitute for the RFD12N06RLE. This device maintains active product status and carries ROHS3 compliance certification. The IRLU024NPBF delivers 17A continuous drain current at 25°C (Tc), which approaches the original 18A specification. The 55V Vdss rating is 5V lower than the RFD12N06RLE but remains within acceptable margins for 60V-class applications. Power dissipation capability of 45W exceeds the original 40W specification. The HEXFET® series device operates across the identical temperature range (-55°C to 175°C) and utilizes the same TO-251-3 Short Leads I-PAK footprint. Gate charge and input capacitance characteristics are comparable to the original part.

STD12NF06L-1 (STMicroelectronics)

The STD12NF06L-1 is an active substitute with ROHS3 compliance. This STripFET™ II series device maintains the 60V Vdss rating and operates across the full -55°C to 175°C temperature range. The continuous drain current of 12A is lower than the original 18A specification, limiting this substitute to applications with reduced current requirements. The 42.8W power dissipation capability exceeds the original 40W specification. The TO-251-3 Short Leads I-PAK package provides direct mechanical compatibility. Rds On characteristics at 100mOhm @ 6A, 10V are higher than the original specification, resulting in increased on-state losses.

AOI444 (Alpha & Omega Semiconductor Inc.)

The AOI444 is an active substitute with ROHS3 compliance. This device maintains the 60V Vdss rating and operates across the -55°C to 175°C temperature range. The continuous drain current of 12A (Tc) is lower than the original 18A specification. Power dissipation capability of 20W (Tc) is significantly lower than the original 40W specification, restricting this substitute to lower-power applications. The TO-251-3 Stub Leads I-PAK package provides mechanical compatibility with potential lead length differences. Rds On characteristics of 60mOhm @ 12A, 10V are favorable relative to current capacity.

Frequently Asked Questions (FAQ)

Q: Can the IRLU024NPBF directly replace the RFD12N06RLE in all applications?

A: The IRLU024NPBF is suitable for applications where the 17A continuous drain current and 55V Vdss rating meet circuit requirements. The 1A reduction in current capacity and 5V reduction in voltage rating must be evaluated against specific application margins. The identical TO-251-3 I-PAK footprint and operating temperature range ensure mechanical and thermal compatibility.

Q: What is the primary limitation of the STD12NF06L-1 as a substitute?

A: The STD12NF06L-1 delivers 12A continuous drain current, which is 33% lower than the RFD12N06RLE specification of 18A. This device is suitable only for applications with reduced current requirements. The higher Rds On value of 100mOhm @ 6A, 10V results in increased on-state power dissipation compared to the original part.

Q: Why is the AOI444 limited in substitution scope?

A: The AOI444 provides only 20W maximum power dissipation (Tc), which is 50% lower than the RFD12N06RLE specification of 40W. Combined with the 12A continuous drain current limitation, this device is restricted to low-power applications. The reduced thermal capability limits thermal cycling performance in high-dissipation environments.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The IRLU024NPBF, STD12NF06L-1, and AOI444 are all ROHS3 compliant. The original RFD12N06RLE does not specify RoHS status due to its obsolete classification.

Q: Do the substitute parts use the same package footprint?

A: The IRLU024NPBF and STD12NF06L-1 use TO-251-3 Short Leads I-PAK packages, providing direct footprint compatibility with the RFD12N06RLE. The AOI444 uses TO-251-3 Stub Leads I-PAK, which has the same electrical footprint but different lead lengths. PCB layout verification is required for the AOI444 to confirm lead clearance compatibility.

Q: What is the moisture sensitivity level for all parts?

A: All parts, including the RFD12N06RLE and the three substitute devices, carry Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Q: Are there voltage derating considerations when using the IRLU024NPBF?

A: The IRLU024NPBF carries a 55V Vdss rating compared to the RFD12N06RLE specification of 60V. Applications operating at or near 60V must incorporate adequate voltage margin to ensure the IRLU024NPBF remains within safe operating limits. A 5V margin reduction may be acceptable in applications with regulated supply voltages and transient protection.

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