SSRs Technical Information SSR Description and Circuit Configurations Phototriac coupler Zerocrossing function Model Circuit configuration Phototriac coupler Yes APT Input terminal I/O wave form (for resistive load) Load voltage Trigger circuit Isolation type Output terminal Trigger circuit Load Output terminal Input signal ON OFF Load current Zero-crossing detector circuit AC Phototriac Phototriac coupler No APT Input terminal Load voltage Input signal ON OFF Load current SSR Iso
SSR (continued) Circuit configuration Phototransistor coupler Phototransistor — — Input terminal Load transistor Input signal Output terminal ON OFF Load current ON Phototransistor coupler Input circuit Input signal OFF ON Output condition OFF Phototransistor — Input terminal Input circuit ON Zener diode Phototransistor coupler — 2 — Input Input terminal circuit Load transistor DC logic output AQ1 Rectifier DC I/O wave form (for resistive load) Zener diode Model A reverse conn
Principle of Operation SSR Switching Characteristics 1.SSR for AC Loads (1) Zero-crossing SSR The zero-crossing SSR uses a phototransistor or phototriac coupler to isolate the input from the output (see the circuit configuration on the previous page). When the input signal is activated, the internal zero-crossing detector circuit triggers the triac to turn on as the AC load voltage crosses zero.
Terminology of Phototriac Coupler/AQ-H Term Input side Output side LED forward current IF LED reverse voltage Peak forward current LED dropout voltage VR IFP VF Repetitive peak OFF-state voltage VDRM ON-state RMS current IT(RSM) Non-repetitive surge current ITSM Peak ON-state voltage VTM Peak OFF-state current IDRM Trigger LED current IFT Holding current IH Critical rate of rise of OFF-state voltage Electrical Characteristics 4 Symbol dv/dt Zero-cross voltage VZC Turn on time Ton
Terminology of SSR Term Control voltage Input side Load side Electrical Characteristics Description Input voltage necessary for normal SSR operation under the specified temperature conditions. Threshold at which the output turns on as the control voltage is gradually increased with the Activation voltage specified voltage applied to the loaded output.
Cautions For Use of Phototriac Coupler/AQ-H SAFETY WARNINGS • Do not use the product under conditions that exceed the range of its specifications. It may cause overheating, smoke, or fire. • Do not touch the recharging unit while the power is on. There is a danger of electrical shock. Be sure to turn off the power when performing mounting, maintenance, or repair operations on the relay (including connecting parts such as the terminal board and socket).
(2) Soldering iron method Tip temperature: 350 to 400C 662 to 752F Wattage: 30 to 60 W Soldering time: within 3 s (3) Others Check mounting conditions before using other soldering methods (DWS, VPS, hot-air, hot plate, laser, pulse heater, etc.) • The temperature profile indicates the temperature of the soldered terminal on the surface of the PC board. The ambient temperature may increase excessively. Check the temperature under mounting conditions.
mm inch Type Tape dimensions 0.35±0.05 .014±.002 Tractor feed holes 1.5+0.1 -0 dia. .059+.004 dia. -0 Dimensions of paper tape reel Direction of picking 4.0±0.1 .157±.004 1.75±0.1 .069±.004 5.25±0.1 .207±.004 11.5±0.1 .453±.004 DIP 4-pin wide terminal type 12.1±0.1 .476±.004 Device mounted on tape 3.7±0.3 .146±.012 12.0±0.1 .472±.004 2.0±0.1 .079±.004 24.0±0.3 .945±.012 1.6±0.1 dia. .063±.004 dia. (1) When picked from 1/4-pin side: Part No.
3) Tube (1) Devices are packaged in a tube as pin No. 1 is on the stopper B side. Observe correct orientation when mounting them on PC boards. (SOP type) StopperB (green) StopperA (gray) (DIP type) Stopper B Stopper A 13. Applying stress that exceeds the absolute maximum rating If the voltage and current value for any of the terminals exceeds the absolute maximum rating, internal elements will deteriorate because of the excessive voltage and current.
Cautions for Use of SSR Cautions for Use of SSR SAFETY WARNINGS • Do not use the product under conditions that exceed the range of its specifications. It may cause overheating, smoke, or fire. • Do not touch the recharging unit while the power is on. There is a danger of electrical shock. Be sure to turn off the power when performing mounting, maintenance, or repair operations on the relay (including connecting parts such as the terminal board and socket).
Cautions for Use of SSR Snubber Circuit 1. Reduce dv/dt An SSR used with an inductive load can accidentally fire due to a high load voltage rise rate (dv/dt), even though the load voltage is below the allowable level (inductive load firing). Our SSRs contain a snubber circuit designed to reduce dv/dt (except AQ-H). 2.
Cautions for Use of SSR Choosing the Rated Voltage of the ZNR (1) Peak supply voltage (2) Supply voltage variation (3) Degradation of ZNR characteristic (1 mA10%) (4) Tolerance of rated voltage (10%) For application to 100 V AC lines, choose a ZNR with the following rated voltage: (1) (2) (3) (4) = (1002) 1.11.11.1 = 188 (V) D T H 0.8 dia. .031 dia. 3.0 max. .118 max. W 20.0 min. .787 min. L D: 17.5 dia. max. .689 dia. max. T: 6.5 max. .256 max. H: 20.5 max. .807 max. W: 7.5±1 .298±.
Cautions for Use of SSR 4. Motors When starting, an electric motor draws a symmetrical AC starting current some 5 to 10 times the steady-state load current, superimposed on a DC current. The starting time during which this high starting current is sustained depends on the capacities of the load and load power supply. Measure the starting current and time under the motor’s actual operating conditions and choose an SSR so the peak of the starting current does not exceed 50% of the SSR surge-on current.
Cautions for Use of SSR SSR Driving Circuits 1. Relay Driver 2. NPN Transistor Driver 3. PNP Transistor Driver Load Load Load power supply Load power supply SSR Vcc Load SSR Vcc Load power supply SSR Vcc Relay contacts PNP Transistor NPN Transistor 4. TTL/DTL/IC Driver 5.
Phototriac Coupler/AQ-H Application Examples Phototriac Coupler/AQ-H Application Examples Typical Applications 1. Temperature control for heater control R Triac Input power supply Heater load 4 1 C Phototriac coupler 2 R Varistor Load power supply 3 2.
SSR Application Examples SSR Application Examples Typical Applications 1. Light Bulb 2. Electric Furnace Temperature Control Light bulb Control switch Control voltage source Load power supply SSR Input signal source and temperature sensor SSR Input Heater load Load power supply Load * KT Temperature Controller is available. 3. Single-Phase Induction Motor Control Control voltage source 4.
SSR Load Recommendation Chart Please use this chart when selecting the SSR load. The values presented are for ambient temperatures of 40C 104F (30C 86F) and lower. When selected, please measure the load current waveform and use within the range of each surge current characteristic. Type of load Load voltage 110 V AC 220 V AC Max. load current Heater Solenoid bulb AQG (1A type) 1A 0.8A 0.5A AQG (2A type) 2A 1.6A 1A AQ1 (3A type) 3A 2.4A 1.
