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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Vishay Siliconix 2N6660

Name: 2N6660
Brand: Vishay Siliconix
SKU: 2N6660
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N6660

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: TO-205AD, TO-39-3 Metal Can

Datasheet:: 2N6660.pdf

Description:: MOSFET N-CH 60V 990MA TO205AD

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Product details

Overview

2N6660 from Vishay Siliconix is a military-qualified N-channel enhancement-mode MOSFET in TO-205AD (TO-39) package, rated for 60 V drain-source voltage, 1.3 Ω R_DS(on) at V_GS = 10 V, and 0.99 A continuous drain current at T_C = 25 °C. It serves as a low-voltage logic-level switch in solid-state relays and battery-operated systems.

For engineers reviewing the 2N6660 datasheet, 2N6660 pinout, 2N6660 application, or 2N6660 equivalent, key selection factors include its 1.7 V gate threshold, 35 pF input capacitance, 8 ns turn-on time, and direct TTL/CMOS drivability without buffer stages.

Technical Context

This MOSFET employs silicon planar technology with a single N-channel structure optimized for high-reliability switching. Its low 1.7 V V_GS(th) enables operation from 3.3 V and 5 V logic rails, while the 20 °C/W junction-to-case thermal resistance supports stable power dissipation up to 6.25 W at T_C = 25 °C.

The device features integrated body diode with 0.8 V forward voltage at 0.99 A, and exhibits gate charge of 12.5 pC at V_DS = 30 V. Switching performance remains stable across -55 °C to 150 °C operating junction temperature range, with turn-off time specified at 8.5 ns under standardized 25 V/25 Ω test conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	60 V - Maximum blocking voltage before avalanche conduction; suitable for 48 V system interfaces
R_DS(on)	1.3 Ω @ V_GS = 10 V - Low conduction loss enabling <1.3 W I²R heating at 1 A load
V_GS(th)	1.7 V typ - Ensures full enhancement with standard 3.3 V or 5 V logic outputs
C_iss	35 pF - Enables fast switching with minimal driver loading; compatible with microcontroller GPIOs
t_ON	8 ns - Supports >100 MHz switching in pulse-width modulation circuits
P_D	6.25 W @ T_C = 25 °C - Requires heatsinking above ~1.5 W in ambient-air mounting
I_D cont	0.99 A @ T_C = 25 °C - Rated for sustained relay/solenoid drive loads without derating

Pinout & Package

2N6660 is housed in TO-205AD (TO-39 tall lid) metal can package with case-connected drain. The package provides robust thermal path via case-to-heatsink interface and meets MIL-PRF-19500 requirements for high-reliability applications.

Pin/Terminal	Circuit Role	Design Meaning
1 (Top View: Left)	Drain (D)	Electrically connected to metal case; must be isolated from PCB ground unless referenced to common heat sink
2 (Top View: Center)	Gate (G)	High-impedance control terminal; requires ESD protection and gate resistor for stability
3 (Top View: Right)	Source (S)	Reference node for gate drive; forms return path for load current and body diode conduction

Key Features

Feature	Design Value
Low threshold voltage	1.7 V typical enables direct interface with 3.3 V CMOS logic without level-shifting
Low input capacitance	35 pF reduces gate drive power and allows use of low-current MCU pins
Fast switching speed	8 ns turn-on time supports high-frequency PWM in precision timing circuits
Military qualification	JANTXV screening per MIL-PRF-19500 ensures reliability in aerospace and defense platforms
Integrated body diode	0.8 V V_SD at 0.99 A provides freewheeling path for inductive loads like relays and solenoids

Applications

Solid-State Relay Control	Battery-Powered Instrumentation
Use Scenario: Replacing electromechanical relays in avionics signal routing modules where vibration resistance and long life are critical. IC Role / Device Role / Timing Role: High-side or low-side power switch controlling 24–48 V DC loads with TTL-compatible enable signals. Use Value: Eliminates contact bounce and wear; 1.3 Ω R_DS(on) limits self-heating to <1.3 W at 1 A, supporting sealed enclosure operation.	Use Scenario: Power gating for sensor subsystems in portable field test equipment powered by Li-ion batteries. IC Role / Device Role / Timing Role: Load switch enabling/disabling 3.3 V or 5 V rails under microcontroller command. Use Value: 1.7 V V_GS(th) ensures reliable turn-on from MCU GPIO; low leakage (<1 μA IDSS) preserves battery life during sleep mode.
TTL/CMOS Direct Drive	Hi-Rel Solenoid Interface
Use Scenario: Driving LED arrays and small displays in military manpack radios where board space and component count are constrained. IC Role / Device Role / Timing Role: Logic-level N-channel switch interfacing directly with 5 V TTL outputs without external drivers. Use Value: 35 pF C_iss prevents excessive capacitive loading on driving gates; fast 8 ns t_ON supports multiplexed display updates.	Use Scenario: Controlling fuel valve actuators in jet engine control units requiring guaranteed operation over -55 °C to +125 °C. IC Role / Device Role / Timing Role: Robust power switch handling pulsed 0.99 A loads with integrated flyback diode conduction. Use Value: JANTXV qualification and 150 °C max T_J ensure compliance with MIL-STD-810 thermal shock profiles.

Solid-State Relay Control

Battery-Powered Instrumentation

Use Scenario: Replacing electromechanical relays in avionics signal routing modules where vibration resistance and long life are critical.

IC Role / Device Role / Timing Role: High-side or low-side power switch controlling 24–48 V DC loads with TTL-compatible enable signals.

Use Value: Eliminates contact bounce and wear; 1.3 Ω R_DS(on) limits self-heating to <1.3 W at 1 A, supporting sealed enclosure operation.

Use Scenario: Power gating for sensor subsystems in portable field test equipment powered by Li-ion batteries.

IC Role / Device Role / Timing Role: Load switch enabling/disabling 3.3 V or 5 V rails under microcontroller command.

Use Value: 1.7 V V_GS(th) ensures reliable turn-on from MCU GPIO; low leakage (<1 μA IDSS) preserves battery life during sleep mode.

TTL/CMOS Direct Drive

Hi-Rel Solenoid Interface

Use Scenario: Driving LED arrays and small displays in military manpack radios where board space and component count are constrained.

IC Role / Device Role / Timing Role: Logic-level N-channel switch interfacing directly with 5 V TTL outputs without external drivers.

Use Value: 35 pF C_iss prevents excessive capacitive loading on driving gates; fast 8 ns t_ON supports multiplexed display updates.

Use Scenario: Controlling fuel valve actuators in jet engine control units requiring guaranteed operation over -55 °C to +125 °C.

IC Role / Device Role / Timing Role: Robust power switch handling pulsed 0.99 A loads with integrated flyback diode conduction.

Use Value: JANTXV qualification and 150 °C max T_J ensure compliance with MIL-STD-810 thermal shock profiles.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel MOSFET switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2N7000	Lower V_DS (60 V same), higher R_DS(on) (5 Ω), TO-92 package, commercial grade only	Lacks military qualification and thermal capability; unsuitable for high-temp or high-reliability environments	Select 2N6660 when JANTXV screening, TO-39 mechanical robustness, or sub-2 Ω on-resistance is required
VN10K	Same V_DS (60 V), similar R_DS(on) (1.5 Ω), TO-92, no military spec, lower I_D (0.36 A)	Not qualified for aerospace use; limited current handling restricts solenoid/relay drive capability	Choose 2N6660 for applications needing ≥0.99 A continuous current and MIL-PRF-19500 compliance

Compared with 2N7000 and VN10K, the 2N6660 delivers superior thermal performance (20 °C/W R_thJC vs. >200 °C/W), verified military screening, and higher current rating-making it the only option qualified for flight-critical load switching in harsh environments.

Availability

2N6660 is available at Aetrix Electronics and suitable for solid-state relay control, battery-powered instrumentation, TTL/CMOS direct drive, and hi-rel solenoid interface applications requiring stable component supply and long-term obsolescence management.

Supply support for 2N6660 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Siliconix is a global semiconductor manufacturer specializing in discrete power MOSFETs, diodes, and optoelectronics with emphasis on high-reliability and automotive-grade components.

The 2N6660 belongs to Vishay's legacy military MOSFET product line designed specifically for high-reliability analog switching in aerospace, defense, and industrial control systems where extended temperature operation and rigorous screening are mandatory.

FAQ

What is the maximum continuous drain current rating for the 2N6660 at 100 °C case temperature?

The 2N6660 has a continuous drain current rating of 0.62 A at T_C = 100 °C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limitations of the TO-205AD package and ensures safe operation within the 150 °C maximum junction temperature limit. Engineers must verify heatsink design to maintain T_C ≤ 100 °C under sustained 0.62 A load conditions.

Is the 2N6660 pin-compatible with other TO-39 N-channel MOSFETs such as the 2N7002?

No, the 2N6660 is not pin-compatible with the 2N7002. The 2N6660 uses TO-205AD (TO-39) with Drain-Gate-Source pinout (1-2-3 top view), whereas the 2N7002 is in SOT-23 package with different pin assignment and electrical ratings. Physical and functional incompatibility means direct substitution is not possible without PCB redesign.

Does the 2N6660 have an integrated body diode, and what is its forward voltage specification?

Yes, the 2N6660 includes an integrated body diode with a forward voltage (V_SD) of 0.8 V typical at I_S = 0.99 A and V_GS = 0 V. This diode enables freewheeling current paths in inductive load applications such as relay and solenoid driving, reducing voltage spikes and eliminating need for external catch diodes in many designs.

What is the gate threshold voltage range for the 2N6660 across its full operating temperature range?

The 2N6660 gate threshold voltage (V_GS(th)) ranges from 0.3 V minimum at T_J = 125 °C to 2.5 V maximum at T_J = -55 °C, with a typical value of 1.7 V at 25 °C. This wide variation requires gate drive design to accommodate worst-case thresholds-especially at low temperatures where higher V_GS may be needed to ensure full enhancement.

Can the 2N6660 be used in surface-mount assemblies, or is it through-hole only?

The 2N6660 is exclusively a through-hole device in TO-205AD (TO-39) metal can package and is not suitable for surface-mount assembly. Its leaded construction, case-connected drain, and thermal design require axial lead insertion and mechanical mounting to a heatsink or chassis. No SMD variant of the 2N6660 exists in the Vishay product portfolio.

2N6660 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Package/Case:: TO-205AD, TO-39-3 Metal Can

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 60 V

Current - Continuous Drain (Id) @ 25°C:: 990mA (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 5V, 10V

Rds On (Max) @ Id, Vgs:: 3Ohm @ 1A, 10V

Vgs(th) (Max) @ Id:: 2V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 50 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 725mW (Ta), 6.25W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-205AD (TO-39)

2N6660 FAQ

1.How can I place an order for 2N6660 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N6660 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 2N6660 reliable?

The price and inventory of 2N6660 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N6660 is usually 5 days.

3.What payment methods are accepted for 2N6660?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N6660 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N6660?

2N6660 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N6660 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 2N6660?

For technical support, including 2N6660 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N6660 requirements.

6.How does Aetrix verify that 2N6660 is sourced from the original manufacturer or authorized distributors?

All 2N6660 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2N6660 meets industry standards.

7.What is the process for return or replacement of 2N6660?

All 2N6660 units undergo pre-shipment inspection (PSI). If there is an issue with 2N6660, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 2N6660 part is unused and in its original packaging.

Return procedure for 2N6660:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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