M221
1 Form A
Solid State Relay
DESCRIPTION
The M221 is a bi-directional, single-pole, single-throw, normally open multipurpose solid-state relay in a miniature 4-pin small outline
package. It is designed to replace electromechanical relays in general purpose switching applications. The relay consists of an integrated
circuit that drives two rugged source-to-source enhancement type DMOS transistors - optically coupled to a light emitting diode. The output
MOS transistors are protected with free-wheeling diodes that can handle up to 5A of inrush current, making the relay ideal for switching
lamps and highly inductive loads.
FEATURES
APPLICATIONS
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High input-to-output isolation
Low input control power consumption
140mA maximum continuous load current
20 ohms maximum on-resistance
Long life/high reliability
Ultra miniature 4-pin small outline package
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Telecom switching
Tip/Ring control
PCMCIA modules
Multiplexers
Meter reading systems
Data acquisition
Medical equipment
Battery monitoring
Home/Safety security systems
OPTIONS/SUFFIXES
MAXIMUM RATINGS
PARAMETER
Storage Temperature
Operating Temperature
UNIT
°C
°C
mA
mA
V
mW
6
400
MIN
-55
-40
TYP
MAX
125
85
40
400
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-TR
Tape and Reel
SCHEMATIC DIAGRAM
1
+ Input
4
Load
Continuous Input Current
Transient Input Current
IC
2
- Input
3
Load
Reverse Input Control
Voltage
Output Power Dissipation
APPROVALS
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BABT CERTIFICATE #650192:
BS EN 60950, BS EN 41003, BS EN 60065
rev 1.0
Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com