December 2010

Doc ID 15238 Rev 4

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13

ACST12

Overvoltage protected AC switch

Features

Benefits

described in IEC 61000-4-4 standards

Applications

industrial control systems

– Universal motor of washing machine drum

– Compressor for fridge or air conditioner

Description

The ACST12 series belongs to the ACS™/ACST

specific discrete) technology. This high

performance device is suited to home appliances

or industrial systems and drives loads up to 12 A.

This ACST12 switch embeds a Triac structure and

a high voltage clamping device able to absorb the

inductive turn-off energy and withstand line

transients such as those described in the

IEC 61000-4-5 standard. The ACST1210-7 needs

and still provides a high electrical noise immunity

complying with the IEC 61000-4-4 standard. The

ACST1235-7 offers an extremely high static dV/dt

immunity of 2 kV/µs minimum.

Figure 1.

Functional diagram

TM: ACS is a trademark of STMicroelectronics

®: A.S.D. is a registered trademark of STMicroelectronics

Table 1.

Device summary

Symbol

Value

Unit

12

A

700

V

10 or 35

mA

TO-220AB

ACST1210-7T

ACST1235-7T

COM

OUT

OUT

G

ACST1210-7G

ACST1235-7G

G

OUT

COM

G

COM

OUT

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