Document
www.DataSheet4U.com
High Voltage Solid State Relays General Information
FEATURES 3750 Vrms or 5300 Vrms I/O isolation Current-limit protection built-in Linear ac/dc operation High-reliability monolithic receptor Extremely low leakage current (pA) High contact off-impedance (GW) Low power consumption (1 mW—12 mW) Very low switch offset (typically 0.1 mV) Logic compatible Clean, bounce-free switching Built-in 1 Form C break-before-make High surge capability Insensitive to dv/dt Surface mountable Compatible with UL1459 and FCC 68.302 UL recognized CSA certified BABT certificate of recognition to BS6301 DESCRIPTION Siemens Solid State Relays (SSRs) are miniature, optically-coupled relays with high-voltage MOSFET outputs. The relays are capable of switching ac or dc loads from as little as nanovolts to hundreds of volts. Likewise, the relays can switch currents in the range of nanoamps to hundreds of milliamps. The MOSFET switches are ideal for small signal switching and are primarily suited for dc or audio frequency applications. Siemens offers integrated current limiting on many of its relays. If load current through the relay exceeds the rated value, the relay clamps the current at a predefined value. If the excessive load current persists, the limiting circuit has a foldback feature to minimize relay power dissipation. The current-limit circuit has a multitude of uses. It can be used in telephony to clamp excessive currents emanating from lightning strikes and/ or power-main crosses or in instrumentation and industrial application to squelch transients from reactive loads. The current-limit circuit also provides short-circuit protection in power-feed applications. The SSRs feature a monolithic output die that minimizes wire bonds and permits easy integration of high-performance circuits such as current limiting in normally-open switches. The output die contains all the necessary circuitry to perform a relay function, including the photodiode receptor array, turn-on and turn-off control circuitry, and the MOSFET switches. The optically-coupled input is controlled by a highly efficient GaAlAs infrared LED. Siemens SSRs are available in a 6- or 8-pin through-hole DIP or in gullwing surface-mount packages. Some parts are also offered in 8- or 18-pin small-outline packages (SOPs). The SOPs are size and height compatible with PCMCIA Type 2 cards. A 0.4 mm distance through insulation spacing is also available on “H” suffix coded parts. Refer to the Parts Coding section for a more in-depth description of these parts.
• • • • • • • • • • • • • • • • • •
BENEFITS • Long life • Maintenance free • Current-limit SSRs can sustain repeated faults without damage Minimizes drive circuitry • • Noiseless • Immune to shock • Immune to environmental hazards such as salt, dirt, and humidity • No arcing • No mounting restrictions • Preapproved for DAA applications • High reliability • Easily configured in series or in parallel for increased voltage or current
Siemens Microelectronics, Inc. • Optoelectronics Division www.smi.siemens.com/opto/
1 of 20
October 1998
www.DataSheet4U.com
Typical Applications • ac Switch • Telephone • Heater Control • Light Control • Switching Systems • Voltmeters • Test Equipment
• • • • • • •
Modems Programmable Controllers FAX Data Acquisition Systems Security Equipment Electric Meters Ring Relay
Typical Applications (continued) • Service Equipment • Thermostats • Answering Machines • E&M Signaling • Battery Switch • Multiplexers • Scanners • Board Testers • Gas Pumps • Motor Controls • Output Modules • Appliances
Application Function Equipment
Flying Capacitor Flying Capacitor Switch Data Acquisition Systems Multiplexers Scanners
Application Function
Equipment
LH1522 LH1522
Telephone Line Interface/SLIC Ring Relay Break Switch Ground Start Test Access E&M Signalling Subscriber Line Interface Circuits PBX Switching Systems Test/Service Equipment
(1/2) LH1524
SENSOR OUTPUT
+ –
DATA OUT
RING GENERATOR
RING ACCESS TIP
SECONDARY PROTECTOR AT&T LH1150
LH1513 BREAK SWITCH
LINE FEED
Application Function Equipment
Ring Generators Square Wave Generator PBX Central Office Equipment Ring Generator
RING LH1504 GROUND START RING ACCESS (1/2) LH1524
LH1513
LH1513
dcV
20 Hz 2 dcV P-P ac
Application Function Equipment
+5 V 20 Hz
+5 V
Lamp, Light, Indicator Control ac Switch Programmable Controllers Thermostats Control Panels Industrial Controls
LH1516 +5 V
Siemens Microelectronics, Inc. • Optoelectronics Division www.smi.siemens.com/opto/
2 of 20
Typical Applications October 1998
www.DataSheet4U.com
Application Function Equipment
Data Access Arrangement (DAA) Current-Limited Switchhook Control Modems Security Equipment Answering Machines Telephones FAX
Application Function Equipment
Thermocouple Switching Thermocouple Matrix Control Scanners Data Acquisition Systems Programmable Controllers
THERMOCOUPLER
+5 V OFF HOOK LH1525
LH1544
VM
FUSE TIP
ISOLATED CIRCUITRY
TVS RING
RIN.