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Programmable Unijunction Transistors (UJT)

Programmable Unijunction Transistors (PUT) are electronic devices that are similar to Unijunction Transistors (UJT) but have an additional gate terminal that allows for greater control over the triggering and operation of the device.

The PUT consists of a bar of lightly doped n-type silicon with a p-type material implanted in the center, forming two p-n junctions. The two outer ends of the n-type bar are the emitter (E1) and collector (C1) terminals, while the p-type material in the center is the base (B1) terminal. A second gate (G) terminal is connected to the p-type material in the center.

The PUT works by controlling the flow of current between the emitter and collector terminals through the base region. When a voltage is applied to the gate terminal, it creates an electric field that modifies the conductivity of the channel, allowing current to flow between the emitter and collector.

PUTs are often used in timing and oscillation circuits, and as voltage-controlled switches. In oscillator circuits, the PUT is used to provide a timing signal that can be used to trigger other devices, such as thyristors or triacs. In switching applications, the PUT is used to control the turn-on and turn-off of other devices, such as transistors or SCRs.

Programmable Unijunction Transistors (UJT)

Available Parts 7

Part# Info Specs
Part RoHS Manufacturer Description Additional Features Maximum Anode To Cathode Voltage Configuration JEDEC-95 Code JESD-30 Code JESD-609 Code No. of Elements No. of Terminals Maximum On-state Current Maximum Operating Temperature Minimum Operating Temperature Package Body Material Package Shape Package Style (Meter) Maximum Peak Current Peak Reflow Temperature (C) Maximum Power Dissipation Qualification Sub-Category Surface Mount Terminal Finish Terminal Form Terminal Position Maximum Time At Peak Reflow Temperature (s) Trigger Device Type Minimum Valley Current
2N6027G by Onsemi

2N6027G

Onsemi

The Onsemi 2N6027G is a Programmable UJT with max on-state current of 0.15A and anode-cathode voltage of 40V. It has a single configuration, suitable for triggering applications in circuits requiring precise timing control at temperatures ranging from -50 to 125°C.

40 V

SINGLE

TO-92

O-PBCY-T3

e1

1

3

.15 A

125 Cel

-50 Cel

PLASTIC/EPOXY

ROUND

CYLINDRICAL

2 uA

260

.3 W

Not Qualified

Programmable Unijunction Transistors

NO

TIN SILVER COPPER

THROUGH-HOLE

BOTTOM

PROGRAMMABLE UJT

70 uA

2N6028G by Onsemi

2N6028G

Onsemi

2N6028G by Onsemi is a Programmable UJT with max on-state current of 0.15A and anode-cathode voltage of 40V. It has a single configuration, operates b/w -50 to 125 °C, and is ideal for triggering applications in electronics circuits.

40 V

SINGLE

TO-92

O-PBCY-T3

e1

1

3

.15 A

125 Cel

-50 Cel

PLASTIC/EPOXY

ROUND

CYLINDRICAL

.15 uA

260

.3 W

Not Qualified

Programmable Unijunction Transistors

NO

TIN SILVER COPPER

THROUGH-HOLE

BOTTOM

PROGRAMMABLE UJT

25 uA

2N6027RL1G by Onsemi

2N6027RL1G

Onsemi

2N6027RL1G by Onsemi is a Programmable UJT with max on-state current of 0.15A, anode-cathode voltage of 40V, and min valley current of 70uA. Ideal for triggering circuits in applications like pulse generators and thyristor firing.

EUROPEAN PART NUMBER

40 V

SINGLE

TO-92

O-PBCY-T3

e1

1

3

.15 A

125 Cel

-50 Cel

PLASTIC/EPOXY

ROUND

CYLINDRICAL

2 uA

260

.3 W

Not Qualified

Programmable Unijunction Transistors

NO

TIN SILVER COPPER

THROUGH-HOLE

BOTTOM

PROGRAMMABLE UJT

70 uA

2N6027RLRAG by Onsemi

2N6027RLRAG

Onsemi

2N6027RLRAG by Onsemi is a Programmable UJT with max on-state current of 0.15A, anode-cathode voltage of 40V, and min valley current of 70uA. It is used in trigger devices, operating b/w -50 to 125°C, with a power dissipation of 0.3W for applications requiring single configuration UJTs.

40 V

SINGLE

TO-92

O-PBCY-T3

e1

1

3

.15 A

125 Cel

-50 Cel

PLASTIC/EPOXY

ROUND

CYLINDRICAL

2 uA

260

.3 W

Not Qualified

Programmable Unijunction Transistors

NO

Tin/Silver/Copper (Sn/Ag/Cu)

THROUGH-HOLE

BOTTOM

40

PROGRAMMABLE UJT

70 uA

2N6028RLRAG by Onsemi

2N6028RLRAG

Onsemi

2N6028RLRAG by Onsemi is a Programmable UJT with max on-state current of 0.15A and anode-cathode voltage of 40V. It has a single configuration, cylindrical package style, and operates b/w -50 to 125°C. Ideal for triggering devices in applications requiring precise control over valley currents and peak reflow temperatures.

40 V

SINGLE

TO-92

O-PBCY-T3

e1

1

3

.15 A

125 Cel

-50 Cel

PLASTIC/EPOXY

ROUND

CYLINDRICAL

.15 uA

260

.3 W

Not Qualified

Programmable Unijunction Transistors

NO

Tin/Silver/Copper (Sn/Ag/Cu)

THROUGH-HOLE

BOTTOM

40

PROGRAMMABLE UJT

25 uA

2N6028RLRMG by Onsemi

2N6028RLRMG

Onsemi

2N6028RLRMG by Onsemi is a programmable unijunction transistor (UJT) with a max on-state current of 0.15 A and a max anode to cathode voltage of 40 V. It is commonly used as a trigger device in various applications such as oscillators and timing circuits.

40 V

SINGLE

TO-92

O-PBCY-T3

e1

1

3

.15 A

125 Cel

-50 Cel

PLASTIC/EPOXY

ROUND

CYLINDRICAL

.15 uA

260

.3 W

Not Qualified

Programmable Unijunction Transistors

NO

TIN SILVER COPPER

THROUGH-HOLE

BOTTOM

PROGRAMMABLE UJT

25 uA

2N6028RLRPG by Onsemi

2N6028RLRPG

Onsemi

2N6028RLRPG by Onsemi is a Programmable UJT with max on-state current of 0.15A and anode-cathode voltage of 40V. It has a package style of cylindrical and operates b/w -50 to 125°C. Ideal for triggering circuits in applications requiring precise control like timing circuits and oscillators.

40 V

SINGLE

TO-92

O-PBCY-T3

e1

1

3

.15 A

125 Cel

-50 Cel

PLASTIC/EPOXY

ROUND

CYLINDRICAL

.15 uA

260

.3 W

Not Qualified

Programmable Unijunction Transistors

NO

TIN SILVER COPPER

THROUGH-HOLE

BOTTOM

PROGRAMMABLE UJT

25 uA