ZVN0540ASTZ Equivalent & Substitute Parts

Part Overview

The ZVN0540ASTZ is an N-Channel MOSFET manufactured by Diodes Incorporated, rated for 400V drain-to-source voltage with 90mA continuous drain current and 700mW power dissipation. The device features a through-hole E-Line (TO-92 compatible) package suitable for general-purpose switching applications. The ZVN0540ASTZ is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure long-term component availability for new production and field replacements.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain to Source Voltage (Vdss)	400	V
Current - Continuous Drain (Id) @ 25°C	90	mA
Rds On (Max) @ Id, Vgs	50	Ohm @ 100mA, 10V
Vgs(th) (Max) @ Id	3	V @ 1mA
Power Dissipation (Max)	700	mW
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	E-Line-3 (TO-92 compatible)	—

Substitute Part Grouping Explanation

Substitution of the ZVN0540ASTZ is determined by electrical and mechanical parameter compatibility within the N-Channel MOSFET category. The primary substitution criterion is functional equivalence based on the following parameters:

Critical Matching Parameters:

FET Type: N-Channel
Technology: MOSFET (Metal Oxide)
Mounting Type: Through Hole
Package / Case: E-Line-3 (TO-92 compatible)
Continuous Drain Current (Id): 90mA
Rds On (Max): 50 Ohm @ 100mA, 10V
Vgs(th) (Max): 3V @ 1mA
Power Dissipation (Max): 700mW
Operating Temperature Range: -55°C to 150°C

Allowable Variation Parameter:

Drain to Source Voltage (Vdss): The substitute part may have equal or higher voltage rating, provided all other electrical and mechanical specifications remain identical.

The ZVN0545ASTZ qualifies as a direct substitute because it maintains all critical parameters while providing an increased Vdss rating of 450V, offering enhanced voltage margin for the same current and power dissipation specifications.

Parameter Comparison

Parameter	ZVN0540ASTZ (Main)	ZVN0545ASTZ (Substitute)	Unit
Manufacturer	Diodes Incorporated	Diodes Incorporated	—
FET Type	N-Channel	N-Channel	—
Technology	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)	—
Drain to Source Voltage (Vdss)	400	450	V
Current - Continuous Drain (Id) @ 25°C	90	90	mA
Drive Voltage (Max Rds On)	10	10	V
Rds On (Max) @ Id, Vgs	50 @ 100mA, 10V	50 @ 100mA, 10V	Ohm
Vgs(th) (Max) @ Id	3 @ 1mA	3 @ 1mA	V
Vgs (Max)	±20	±20	V
Input Capacitance (Ciss) (Max) @ Vds	70 @ 25V	70 @ 25V	pF
Power Dissipation (Max)	700	700	mW
Operating Temperature Range	-55 to 150	-55 to 150	°C
Mounting Type	Through Hole	Through Hole	—
Package / Case	E-Line-3	E-Line-3	—
Product Status	Obsolete	Active	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	—
REACH Status	REACH Unaffected	REACH Unaffected	—

Engineering Selection Recommendations

The ZVN0545ASTZ is the direct substitute for the obsolete ZVN0540ASTZ. Selection of the ZVN0545ASTZ is supported by the following factors:

Product Status: The ZVN0545ASTZ maintains active product status with Diodes Incorporated, ensuring ongoing availability and manufacturing support. The ZVN0540ASTZ is classified as obsolete, making the ZVN0545ASTZ the appropriate choice for new designs and production continuity.

Electrical Equivalence: All critical electrical parameters are identical between the two parts, including continuous drain current (90mA), on-resistance (50 Ohm @ 100mA, 10V), gate threshold voltage (3V @ 1mA), and power dissipation (700mW). The ZVN0545ASTZ provides a higher Vdss rating (450V versus 400V), which represents an enhancement rather than a limitation for applications designed around the original 400V specification.

Mechanical and Package Compatibility: Both parts utilize identical through-hole E-Line-3 (TO-92 compatible) packaging, ensuring direct pin-for-pin compatibility and identical PCB footprints.

Regulatory Compliance: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity levels (MSL 1), confirming equivalent environmental and regulatory standing.

Frequently Asked Questions (FAQ)

Q: Can the ZVN0545ASTZ be used as a direct replacement for the ZVN0540ASTZ in existing designs?

A: Yes. The ZVN0545ASTZ is electrically and mechanically equivalent to the ZVN0540ASTZ. All critical parameters including drain current, on-resistance, gate threshold voltage, and power dissipation are identical. The higher voltage rating (450V versus 400V) does not create compatibility issues for applications designed for 400V operation.

Q: What is the primary difference between the ZVN0540ASTZ and ZVN0545ASTZ?

A: The primary difference is the drain-to-source voltage (Vdss) rating. The ZVN0540ASTZ is rated for 400V, while the ZVN0545ASTZ is rated for 450V. All other electrical and mechanical specifications are identical.

Q: Are the packages identical between these two parts?

A: Yes. Both parts use the E-Line-3 package (TO-92 compatible) with through-hole mounting. Pin configuration and PCB footprint are identical, enabling direct substitution without layout modifications.

Q: Why is the ZVN0540ASTZ listed as obsolete?

A: The ZVN0540ASTZ has been discontinued by Diodes Incorporated. The ZVN0545ASTZ serves as the active replacement, offering equivalent performance with enhanced voltage capability.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts maintain identical RoHS3 compliance, REACH unaffected status, and moisture sensitivity levels (MSL 1). Regulatory and environmental standing are equivalent.

Q: Can the ZVN0545ASTZ be used in applications requiring the full 450V rating?

A: Yes. The ZVN0545ASTZ is rated for 450V continuous drain-to-source voltage and is suitable for applications requiring this voltage level. It is also suitable for applications originally designed for the 400V ZVN0540ASTZ.

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