PSTT PC / PSTT SC / PSTT ZC

POWERSEM GmbH, Walpersdorfer Str. 53

91126 D- Schwabach

Phone: 09122 - 9764-0 Fax.: 09122 - 9764-20

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 2006 POWERSEM reserves the right to change limits, test conditions and dimensions

Active Trigger Units for Thyristors

PSTT PC - controlled rectifiers, ac controllers, dc motor control, all other applications

PSTT SC - economic low cost ac controllers

PSTT ZC - zero crossing switching – heating, welding, power factor correction

ABSOLUTE MAXIMUM RATINGS

Type

PSTT PC/12

PSTT PC/20

PSTT SC/12

PSTT SC/20

Parameter

Symbol

PSTT ZC/12

PSTT ZC/20

Unit

Peak voltage-positive and negative

Vp

1200

2000

V

Nominal mains voltage

Vm

400

690

Vrms

Continuous DC voltage

V=

400

690

Vdc

Turn-on delay for gate current >1A

tgd

5

5

µs

Input-output isolation

Vi

5300Vrms 60Hz 1min VDE0884

Input-output transient immunity

(dv/dt)c

5000

V/µs

Device transient immunity

(dv/dt)d

2000

V/µs

Ambient temperature range

Ta

-25 to +85

°C

External gate cathode short circuit during operation can be destructive

A2

G2

K2

G1

K1

K2

G1

K1

G2

The Active Trigger is an economic replacement of

pulse transformers including all associated circuitry in

phase controlled thyristor equipment. Due to the small

control current it becomes the ideal link between any

size of thyristor and the control intelligence. Each

Active Trigger can trigger two thyristors and is

intended for mains voltages from 115V to 690Vrms.

Its operation is based on an optically activated current

source connected between anode and gate of the

thyristor to be triggered. Thus a small electrically

isolated control current initiates a large gate current

without the necessity of a gate drive power supply.

Three

different

application

specific

types

are

available.

Topview inmm

Top view in mm

Height 19 mm

PSTT PC

PSTT ZC

PSTT SC

Height 23 mm

PCB hole size 0.8 mm

PCB hole size 0.8 mm