FDN336P-NL Equivalent & Substitute Parts

Part Overview

The FDN336P-NL is a P-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 1.3A continuous drain current at 25°C. The device is housed in a SOT-23-3 surface mount package and is part of the PowerTrench® series. This part is currently listed as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility with the electrical specifications and physical package requirements of the original design.

Key Parameters

Parameter	FDN336P-NL Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	20	V
Current - Continuous Drain (Id) @ 25°C	1.3	A
Rds On (Max) @ Id, Vgs	200 mOhm @ 1.3A, 4.5V	—
Power Dissipation (Max)	500	mW
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-23-3	—
Vgs(th) (Max) @ Id	1.5 @ 250µA	V
Gate Charge (Qg) (Max) @ Vgs	5 @ 4.5V	nC
Input Capacitance (Ciss) (Max) @ Vds	330 @ 10V	pF

Substitute Part Grouping Explanation

Substitute parts for the FDN336P-NL are classified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Critical Matching Parameters:

FET Type: P-Channel (all substitutes must be P-Channel)
Drain to Source Voltage (Vdss): Minimum 20V (equal or higher rating acceptable)
Continuous Drain Current (Id): Minimum 1.3A at 25°C (equal or higher rating acceptable)
Package Type: SOT-23-3 surface mount (physical compatibility required)
Operating Temperature Range: -55°C to 150°C (must encompass or match)

Acceptable Variation Parameters:

Rds On (Max): Lower values are acceptable (improved performance)
Power Dissipation: Equal or higher ratings are acceptable
Gate Charge and Input Capacitance: Variations acceptable within application tolerance

Substitutes are grouped into two categories: direct equivalents (identical electrical specifications) and similar alternatives (meeting or exceeding all critical parameters with different secondary characteristics).

Parameter Comparison

Parameter	FDN336P-NL	FDN336P	NVR1P02T1G	AO3423	AO3403	BSH205G2R
Manufacturer	onsemi	onsemi	onsemi	Alpha & Omega	Alpha & Omega	Nexperia
FET Type	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel
Vdss (V)	20	20	20	20	30	20
Id @ 25°C (A)	1.3	1.3	1.0	2.0	2.6	2.0
Rds On (Max) @ Vgs (mOhm)	200 @ 4.5V	200 @ 4.5V	180 @ 10V	92 @ 10V	115 @ 10V	170 @ 4.5V
Power Dissipation (Max) (mW)	500	500	400	1400	1400	480
Vgs(th) (Max) @ 250µA (V)	1.5	1.5	2.3	1.4	1.4	0.95
Gate Charge (Qg) (Max) (nC)	5 @ 4.5V	5 @ 4.5V	2.5 @ 5V	6.6 @ 4.5V	7.2 @ 10V	6.5 @ 4.5V
Input Capacitance (Ciss) (Max) (pF)	330 @ 10V	330 @ 10V	165 @ 5V	620 @ 10V	315 @ 15V	418 @ 10V
Operating Temperature (°C)	-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	SOT-23-3
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	—	Yes (AEC-Q101)	—	—	Yes (AEC-Q100)

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

FDN336P (onsemi) is the direct equivalent to FDN336P-NL. This part maintains identical electrical specifications including 20V Vdss, 1.3A continuous drain current, 200 mOhm Rds On at 4.5V, and 500 mW power dissipation. The FDN336P is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity level. This part is available in higher inventory quantities (107,100 pieces) compared to the obsolete FDN336P-NL, making it the preferred replacement for direct substitution without design modification.

Higher Current Capacity Alternatives (Design Upgrade Path):

AO3423 (Alpha & Omega Semiconductor Inc.) provides enhanced performance with 2.0A continuous drain current at 20V, exceeding the 1.3A requirement of the original part. This device offers superior Rds On performance (92 mOhm at 10V) and higher power dissipation capability (1.4W). The AO3423 is in active production status with ROHS3 compliance and maintains the SOT-23-3 package. This part is suitable for applications requiring increased current handling or thermal margin.

BSH205G2R (Nexperia USA Inc.) is rated for 2.0A at 20V with automotive-grade qualification (AEC-Q100). This part provides 170 mOhm Rds On at 4.5V and 480 mW power dissipation. The automotive qualification and active production status make this suitable for automotive and mission-critical applications.

Conditional Substitutes (Limited Compatibility):

NVR1P02T1G (onsemi) is rated for 1.0A continuous drain current at 20V, which is below the 1.3A specification of the original part. This device includes automotive-grade qualification (AEC-Q101) and is suitable only for applications where the actual operating current does not exceed 1.0A. Lower gate charge (2.5 nC) and input capacitance (165 pF) may provide switching speed advantages in specific circuit topologies.

AO3403 (Alpha & Omega Semiconductor Inc.) is rated for 30V Vdss and 2.6A, exceeding the original specifications. However, this part is designated "Not For New Designs" and should not be selected for new development. Existing designs using this part may continue operation, but migration to active-status alternatives is recommended.

Frequently Asked Questions (FAQ)

Q: Can FDN336P directly replace FDN336P-NL without any circuit modifications?

A: Yes. The FDN336P is a direct equivalent with identical electrical specifications and package type. No circuit modifications are required. The primary difference is product status: FDN336P-NL is obsolete while FDN336P is in active production.

Q: What is the minimum continuous drain current rating I should select for a substitute?

A: The substitute must be rated for a minimum of 1.3A continuous drain current at 25°C to meet the original specification. Parts rated below 1.3A (such as NVR1P02T1G at 1.0A) are acceptable only if your actual circuit operating current does not exceed the substitute's rating.

Q: Are all substitute parts available in the same SOT-23-3 package?

A: Yes. All substitute parts listed are available in SOT-23-3 surface mount package, ensuring physical compatibility with existing PCB layouts and assembly processes.

Q: What is the significance of the "Not For New Designs" status on AO3403?

A: Parts designated "Not For New Designs" are typically in end-of-life phase or have been superseded by improved alternatives. While existing designs may continue using these parts, new product development should select from active-status alternatives such as AO3423, BSH205G2R, or FDN336P.

Q: Can I use a substitute with higher Vdss rating (such as AO3403 at 30V) in place of the 20V rated FDN336P-NL?

A: Yes. A higher Vdss rating provides additional voltage margin and is electrically compatible. However, AO3403 is designated "Not For New Designs." For new applications requiring higher voltage margin, select AO3423 or BSH205G2R, both of which are active-status parts rated for 20V.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. All active-status substitute parts listed (FDN336P, NVR1P02T1G, AO3423, BSH205G2R) are ROHS3 compliant, ensuring regulatory compliance for modern manufacturing and end-of-life disposal.

Q: Are automotive-qualified substitutes required for my application?

A: Automotive qualification (AEC-Q100 or AEC-Q101) is required only if your application is automotive-grade or mission-critical. BSH205G2R carries AEC-Q100 qualification and NVR1P02T1G carries AEC-Q101 qualification. Non-automotive applications may use any active-status substitute meeting the electrical specifications.

Q: What is the difference between Rds On specifications at different Vgs values?

A: Rds On (on-state resistance) varies with gate-source voltage. Lower Vgs values (such as 4.5V) typically result in higher Rds On compared to higher Vgs values (such as 10V). When comparing substitutes, ensure the Vgs condition matches your circuit's gate drive voltage for accurate performance assessment.

Q: Can I use AO3423 (2.0A) instead of FDN336P-NL (1.3A) in an existing design?

A: Yes. AO3423 exceeds the current rating and provides improved Rds On performance. This represents a design upgrade path with enhanced thermal margin and lower power dissipation. No circuit modifications are required, and the SOT-23-3 package ensures physical compatibility.

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