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®

MSS40 / 50 Series

BACK TO BACK SCR MODULE

September 2000 - Ed: 3

MAIN FEATURES:

DESCRIPTION

Packaged in ISOTOP modules, the MSS40 /

MSS50 Series is based on two back-to-back SCR

configurations, providing high noise immunity.

They are suitable for high power applications such

as solid state relays, heating control systems,

welding equipment, motor control circuits...

The compactness of the ISOTOP package allows

high power density and optimized power bus

connections. Thanks to their internal ceramic pad,

they provide high voltage insulation (2500V RMS),

complying with UL standards (File ref: E81734).

Symbol

Value

Unit

55 and 70

A

800 and 1200

V

50

mA

ABSOLUTE RATINGS (limiting values)

Symbol

Parameter

Value

Unit

MSS40

MSS50

RMS on-state current

Tc = 80 °C

55

A

Tc = 85 °C

70

Non repetitive surge peak on-state

current

tp = 16.7 ms

Tj = 25°C

420

630

A

tp = 20 ms

400

600

I

tp = 10 ms

Tj = 25°C

800

1800

dI/dt

Critical rate of rise of on-state current

F = 120 Hz

Tj = 125°C

50

A/µs

Peak gate current

tp = 20 µs

Tj = 125°C

4

A

Average gate power dissipation

Tj = 125°C

1

W

Storage junction temperature range

Operating junction temperature range

- 40 to + 150

- 40 to + 125

°C

Maximum peak reverse gate voltage

5

V

A1

A2

G2

G1

ISOTOP®

ISOTOP is a registred trademark of STMicroelectronics

PIN CONNECTIONS

A1

A2

G1

G2

1: Thyristor 2 Anode (A2)

2: Thyristor 2 Gate (G2)

3: Thyristor 1 Anode (A1)

4: Thyristor 1 Gate (G1)

4

1

3

2