Mfr Part #:

2N4858A

Mfr Name: ISSI

The 2N4858A is an N-Channel Silicon JFET designed for analog switching and chopper applications. It features a TO-18 package and a maximum Drain-Source Voltage of 40V.

✓ Total Stock: 36 pcs

$ Price Range: $0.99

2N4858A Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Speed Components Ltd ✓ Non-Authorised Inventory information	36 pcs On Request	36 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

2N4858A Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	ISSI
Input Capacitance	10pF
Lead Spacing	2.54 mm
Lead Style	Through Hole
Mounting Type	Through Hole
Power Dissipation	360mW
Storage Temperature	-55°C ~ 150°C

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2N4858A Description

Short technical summary and product information.

The CENTRAL SEMICONDUCTOR 2N4858A is an N-Channel Silicon JFET specifically designed for analog switching and chopper applications. This device operates with a maximum Drain-Source Voltage (Vds) of 40V and a Drain-Gate Voltage (Vdg) of 40V. It can handle a Forward Gate Current (Igf) of up to 50mA and has a maximum Power Dissipation (Pd) of 360mW at 25°C.

The JFET is housed in a TO-18 case, a common package for discrete semiconductors, suitable for through-hole mounting. Key electrical characteristics include a Gate-Source Cutoff Voltage (Vgs(off)) ranging from 0.8V to 4.0V and a Drain-Source On-State Voltage (Vds(on)) of 0.5V at 5.0mA. The On-Resistance (Rds(on)) is a maximum of 60Ω at 1.0kHz.

Capacitance values are specified for the 2N4858A variant, with Input Capacitance (Ciss) at 10pF and Reverse Transfer Capacitance (Crss) at 3.5pF, both measured at 1.0MHz. Switching times are also provided, with Turn-On Delay Time (td) and Turn-On Rise Time (tr) at 8.0ns, and Turn-Off Delay Time (toff) at 80ns for the 2N4858A.

This component is suitable for applications requiring reliable analog switching and chopping functionalities. Its operating and storage junction temperature range is from -65°C to +200°C.

2N4858A Quick Information

Product Type: JFET Transistor

Canonical Name: 2N4858A N-Channel Silicon JFET

Subcategory: N-Channel

2N4858A Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

2N4858A Estimated Pricing

Qty	Low	High
1+	$0.99	$0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

2N4858A Features

N-Channel Silicon JFET for switching.
40V maximum Drain-Source Voltage.
360mW maximum power dissipation.
TO-18 through-hole package.
Designed for analog switching applications.

2N4858A Applications

Use in analog switch and chopper circuits.
Suitable for low-noise RF amplifier stages.
Can serve as a voltage-controlled resistor.
Use for constant-current source biasing.

2N4858A FAQs

7 frequently asked questions generated from this part’s specifications.

What is the maximum drain-source voltage of the 2N4858A?

The maximum drain-source voltage is 40V.

What is the drain current range of the 2N4858A?

The drain current (IDSS) is between 8mA and 80mA at VDS=15V.

What is the on-resistance of the 2N4858A?

The on-resistance is 60Ω maximum at VGS=0.

What is the power dissipation rating of the 2N4858A?

The power dissipation is 360mW maximum at TA=25°C.

What package is the 2N4858A available in?

The 2N4858A is available in a TO-18 through-hole package.

What is the operating and storage junction temperature range?

The operating and storage junction temperature range is -65°C to +200°C.

What are the input and reverse transfer capacitances of the 2N4858A?

The input capacitance is 10pF and the reverse transfer capacitance is 3.5pF.