BF245B BF245B is an N-Channel JFET from On Semiconductor designed for VHF/UHF amplifiers. It features 30V drain-gate voltage, zero-gate voltage drain current of 6-15mA, and is housed in a through-hole TO-92 package.
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BF245B

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
BF245B is an N-Channel JFET from On Semiconductor designed for VHF/UHF amplifiers. It features 30V drain-gate voltage, zero-gate voltage drain current of 6-15mA, and is housed in a through-hole TO-92 package.
✓ Total Stock: 6 pcs

BF245B Available from 1 distributor

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BF245B Specifications Quick View

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BF245B Description

Short technical summary and product information.

The BF245B is an N-Channel Junction Field-Effect Transistor (JFET) from On Semiconductor, originally sourced from Fairchild Semiconductor. It is designed for VHF/UHF amplifier applications. The device features a maximum drain-gate voltage of 30V and a gate-source voltage rating of -30V. For the BF245B variant, the zero-gate voltage drain current (I_DSS) ranges from 6 mA to 15 mA, and the common source forward transconductance (g_fs) is between 3 mS and 6.5 mS.

 

Power dissipation is rated at 350 mW at 25°C ambient temperature, with a derating factor of 2.8 mW/°C above 25°C. The operating junction temperature range is -55°C to 150°C. The gate-source cutoff voltage (V_GS(off)) spans from -0.5V to -8V.

 

This JFET is housed in a through-hole TO-92 package (TO-226-3 long body variant), with a gate, source, and drain pinout. The mounting type is through-hole, making it suitable for breadboard and prototype designs. The device is sourced from process 50, reflecting its manufacturing heritage.

 

Compliance information indicates RoHS3 compliance, though this is unverified. The part is listed as REACH unaffected and has an MSL rating of 1 (unlimited). However, these compliance flags are low confidence and should be verified with official documentation.

BF245B Quick Information

Product Type: JFET Transistor
Series: BF245
Canonical Name: BF245B N-Channel JFET
Subcategory: N-Channel RF JFET

BF245B Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BF245B Features

  • N-Channel JFET for VHF/UHF amplifiers.
  • Maximum drain-gate voltage rating of 30V.
  • Zero-gate voltage drain current range of 6 to 15 mA.
  • Common source forward transconductance of 3 to 6.5 mS.
  • Through-hole TO-92 package for easy mounting.

BF245B Applications

  • Ideal for VHF/UHF amplifier stages.
  • Suitable for low-noise RF front-end designs.
  • Used in oscillator circuits requiring high input impedance.
  • Applicable in analog switching and chopper circuits.

BF245B FAQs

7 frequently asked questions generated from this part’s specifications.
What is the maximum operating voltage of the BF245B?

The maximum drain-gate voltage (V_DG) is 30 V, and the maximum gate-source voltage (V_GS) is -30 V.

What package is the BF245B available in?

The BF245B is available in a through-hole TO-92 package (TO-226-3, TO-92-3 Long Body).

What is the operating temperature range of the BF245B?

The operating junction temperature range is -55°C to 150°C.

Is the BF245B RoHS compliant?

The BF245B is listed as RoHS3 compliant, but this status is unverified and should be confirmed with official documentation.

What is the drain current range for the BF245B variant?

The zero-gate voltage drain current (I_DSS) for the BF245B variant is 6 mA to 15 mA at V_DS=15V, V_GS=0V.

What is the transconductance of the BF245B?

The common source forward transconductance (g_fs) is 3 mS to 6.5 mS at V_DS=15V, V_GS=0V, f=1kHz.

What is the gate-source cutoff voltage for the BF245B?

The gate-source cutoff voltage (V_GS(off)) ranges from -0.5 V to -8 V at V_DS=15V, I_D=10nA.

BF245B Alternate Parts

Same form/fit/function or matching attribute configuration across different manufacturers.
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BF245A
BF245A
On Semiconductor
BF245A is an N-Channel JFET from ON Semiconductor, rated for 30V drain-source voltage and designed for VHF/UHF amplifier applications. It comes in a TO-92 through-hole package.
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