© 2014 Solid State Optronics • San José, CA

SMA4120

Rev 2.00 (03/05/2014)

001805

Page 1 of 6

SMA4120

1 Form A

600V / 6Ω

MOSFET Output Solid State Relay

Description

The SMA4120 is a single-pole, single-throw, normally open

multipurpose solid state relay. The circuit is composed of

an infra-red LED on the input side optically coupled to a

Photo Diode Array which drives back-to-back high voltage

enhancement type DMOS transistors on the output. The

SMA4120 has a high blocking voltage (600V) and is rated

for a continuous load current of 0.5A. The combination of

high blocking voltage, high load current, and small form

factor make the SMA4120 ideal for electromechanical and

reed relay replacement.

The SMA4120 comes standard in a 4 pin SIP package.

Schematic Diagram

Agency Approvals

UL/C-UL:

File # E90096

VDE:

File # 40035191 (EN 60747-5-2)

Applications



Reed Relay Replacement



Mechanical Relay Replacement



Medical Equipment



Battery Monitoring



Multiplexers



Test Equipment

Absolute Maximum Ratings

The values indicated are absolute stress ratings. Functional

operation of the device is not implied at these or any

conditions in excess of those defined in electrical

characteristics section of this document. Exposure to

absolute Maximum Ratings may cause permanent damage

to the device and may adversely affect reliability.

Storage Temperature …………………………..-55 to +125°C

Operating Temperature

………………………-40 to +85°C

Continuous Input Current………………………………..50mA

Transient Input Current ………………….……………..500mA

Reverse Input Control Voltage …………..…………………5V

Input Power Dissipation…………………………………40mW

Total Power Dissipation ……………………………..…..1.2W

Solder Temperature – Wave (10sec)……………….….260°C

Solder Temperature – IR Reflow (10sec)….…………..260°C

Ordering Information

Part Number

Description

SMA4120

4 pin SIP, (25/Tube)

Features



High Blocking Voltage (600V MIN)



High Load Current (0.5A MAX Continuous)



Low Input Control Current (3mA TYP)



Low On Resistance (4Ω TYP)



High Input-to-Output Isolation (4kV)



Long Life / High Reliability



RoHS / Pb-Free / REACH Compliant

NOTE: Suffixes listed above are not included in marking on

device for part number identification