FDV301N Equivalent & Substitute Parts

Part Overview

The FDV301N is an N-Channel MOSFET manufactured by onsemi, rated for 25 V drain-to-source voltage with 220 mA continuous drain current at 25°C. The device is housed in a SOT-23-3 surface mount package and dissipates a maximum of 350 mW. The FDV301N is classified as an Active product with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain constraints, or design flexibility within specified parameter ranges.

Key Parameters

Parameter	FDV301N Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	25	V
Continuous Drain Current (Id) @ 25°C	220	mA
Rds On (Max) @ Id, Vgs	4 @ 400 mA, 4.5 V	Ohm
Power Dissipation (Max)	350	mW
Operating Temperature Range	−55 to 150	°C
Package Type	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FDV301N is determined by the following critical parameters:

Primary Substitution Criteria:

FET Type: N-Channel (required for functional equivalence)
Drain to Source Voltage (Vdss): Minimum 25 V (equal or greater rating required)
Continuous Drain Current (Id): Minimum 220 mA at 25°C (equal or greater rating required)
Package Type: SOT-23-3 or compatible surface mount package
Operating Temperature Range: −55°C to 150°C (minimum requirement)
RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Acceptable Variations:

Rds On values may vary within acceptable limits for the application
Power dissipation may exceed 350 mW
Gate charge and input capacitance may differ
Vgs(th) threshold voltage may vary within specified ranges

Substitute parts are grouped into two categories: Direct Equivalents (same package, matching or superior electrical ratings) and Alternative Packages (different package form factor with equivalent or superior electrical performance).

Parameter Comparison

Parameter	FDV301N	DMG301NU-7	DMG301NU-13	PJA3428_R1_00001	PJA138K_R1_00001	NTS4409NT1G	BSS138P,215
Manufacturer	onsemi	Diodes Inc.	Diodes Inc.	Panjit	Panjit	onsemi	Nexperia
FET Type	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel
Vdss (V)	25	25	25	30	50	25	60
Id @ 25°C (mA)	220	260	260	300	500	700	360
Rds On (Max) (Ohm)	4 @ 400 mA, 4.5 V	4 @ 400 mA, 4.5 V	4 @ 400 mA, 4.5 V	1.2 @ 300 mA, 4.5 V	1.6 @ 500 mA, 10 V	0.35 @ 600 mA, 4.5 V	1.6 @ 300 mA, 10 V
Power Dissipation (Max) (mW)	350	320	320	500	500	280	350
Operating Temperature (°C)	−55 to 150	−55 to 150	−55 to 150	−55 to 150	−55 to 150	−55 to 150	−55 to 150
Package	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3	SC-70-3	TO-236AB
RoHS Status	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3
MSL	1	1	1	1	1	1	1

Engineering Selection Recommendations

Direct Package Equivalents (SOT-23-3):

The DMG301NU-7 and DMG301NU-13 (Diodes Incorporated) are direct substitutes for the FDV301N. Both devices feature identical Vdss (25 V), equivalent Rds On characteristics (4 Ohm @ 400 mA, 4.5 V), and matching operating temperature range (−55°C to 150°C). The primary difference is packaging format: DMG301NU-7 is supplied in Tape & Reel (TR) format with 152,200 units in stock, while DMG301NU-13 is supplied in Cut Tape (CT) format with 10,300 units in stock. Both are ROHS3 compliant with MSL 1 rating. Selection between these variants depends on procurement and assembly requirements.

Enhanced Performance Alternatives (SOT-23-3 Package):

The PJA3428_R1_00001 (Panjit International) provides superior electrical performance with a higher Vdss rating (30 V) and improved Rds On (1.2 Ohm @ 300 mA, 4.5 V), while maintaining SOT-23-3 package compatibility. Continuous drain current is rated at 300 mA, exceeding the FDV301N specification. Power dissipation is rated at 500 mW. This device is suitable for applications requiring higher voltage headroom or lower on-resistance characteristics.

The PJA138K_R1_00001 (Panjit International) offers the highest voltage rating (50 V) and current capability (500 mA) in the SOT-23-3 package family, with 500 mW power dissipation. This device is applicable to designs requiring extended voltage margin or higher current handling.

Alternative Package Options:

The NTS4409NT1G (onsemi) is supplied in SC-70-3 (SOT323) package with superior current handling (700 mA) and lower Rds On (0.35 Ohm @ 600 mA, 4.5 V). This device is suitable for applications where package size reduction is acceptable and higher current capacity is required. Power dissipation is rated at 280 mW.

The BSS138P,215 (Nexperia USA Inc.) is supplied in TO-236AB package with extended voltage rating (60 V) and 360 mA current capability. This device includes AEC-Q101 automotive qualification and is suitable for automotive-grade applications. Power dissipation is rated at 350 mW (Ta) or 1.14 W (Tc).

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and operating temperature range of −55°C to 150°C, ensuring regulatory and environmental compatibility with the original FDV301N specification.

Frequently Asked Questions (FAQ)

Q: Can the DMG301NU-7 or DMG301NU-13 be used as a direct replacement for the FDV301N?

A: Yes. Both DMG301NU variants are direct substitutes. They share identical Vdss (25 V), equivalent Rds On characteristics (4 Ohm @ 400 mA, 4.5 V), and matching SOT-23-3 package. The only difference is packaging format (Tape & Reel versus Cut Tape). Pin configuration and electrical performance are equivalent.

Q: What is the difference between DMG301NU-7 and DMG301NU-13?

A: Both devices are electrically identical. DMG301NU-7 is supplied in Tape & Reel (TR) format with higher inventory (152,200 units), while DMG301NU-13 is supplied in Cut Tape (CT) format with lower inventory (10,300 units). Selection depends on assembly process requirements and procurement volume.

Q: Can I use the PJA3428_R1_00001 instead of the FDV301N?

A: Yes. The PJA3428_R1_00001 is a suitable substitute with enhanced specifications. It maintains the SOT-23-3 package and provides higher Vdss (30 V), lower Rds On (1.2 Ohm), and higher current rating (300 mA). It is compatible with FDV301N applications and offers improved performance margin.

Q: What are the advantages of the NTS4409NT1G over the FDV301N?

A: The NTS4409NT1G offers significantly lower Rds On (0.35 Ohm versus 4 Ohm), higher current capability (700 mA versus 220 mA), and maintains the same 25 V Vdss rating. The trade-off is a different package format (SC-70-3 instead of SOT-23-3), which requires PCB layout modification. This device is suitable for applications prioritizing low on-resistance and high current handling.

Q: Is the BSS138P,215 compatible with the FDV301N?

A: The BSS138P,215 is functionally compatible but with design considerations. It features higher Vdss (60 V), different package (TO-236AB), and automotive qualification (AEC-Q101). While pin-compatible with SOT-23-3 footprints, the higher voltage rating and automotive grade make it suitable for applications requiring extended voltage margin or automotive-grade reliability.

Q: Do all substitute parts have the same RoHS and MSL ratings as the FDV301N?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the FDV301N specification. This ensures regulatory compliance and moisture sensitivity equivalence across all alternatives.

Q: Can I use the PJA138K_R1_00001 in a circuit designed for the FDV301N?

A: Yes. The PJA138K_R1_00001 is a suitable substitute with superior electrical specifications. It provides higher Vdss (50 V), higher current rating (500 mA), and lower Rds On (1.6 Ohm @ 500 mA, 10 V). The SOT-23-3 package is identical, ensuring pin compatibility. The higher voltage and current ratings provide additional design margin.

Q: What is the primary reason to substitute the FDV301N?

A: Substitution is typically driven by component availability, supply chain constraints, or design optimization. Direct equivalents (DMG301NU series) provide identical performance with different suppliers or packaging formats. Enhanced alternatives (PJA series, NTS4409NT1G, BSS138P,215) offer improved electrical characteristics for applications requiring higher current, lower on-resistance, or extended voltage ratings.

Q: Are there any package compatibility issues when switching from FDV301N to NTS4409NT1G?

A: Yes. The NTS4409NT1G uses SC-70-3 (SOT323) package, which is physically smaller than the SOT-23-3 package of the FDV301N. PCB footprint modification is required. Pin assignment differs between packages, necessitating circuit board redesign. Electrical compatibility is maintained; mechanical integration requires layout changes.

Q: Which substitute offers the best thermal performance?

A: The NTS4409NT1G offers the lowest power dissipation (280 mW) and lowest Rds On (0.35 Ohm), resulting in superior thermal performance. The BSS138P,215 provides the highest thermal capability with 1.14 W rating at Tc (case temperature). Selection depends on thermal management requirements and package constraints.

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