S211

S211 Dual 1 Form A Solid State Relay DESCRIPTION The S211 is a single-pole, double-throw, normally open, SCR output device. The circuits are composed of one LED on the input side which activates an optically coupled IC circuit on the output side - controlling the firing angle of two back-to-back SCRs. This circuit assures no false triggering under most adverse conditions and a tight zero-volt window not exceeding 5V. FEATURES APPLICATIONS • • • • • • • • Inverse parallel SCR output High transient immunity 600V blocking voltage 0.8A maximum continuous current Low input control current High input-to-output isolation Solid state reliability Zero-volt switching • • • • • • • • Programmable controls Valve control Solenoids Remote switching Home appliances Metering equipment Heating elements Gas pump control circuitry OPTIONS/SUFFIXES MAXIMUM RATINGS PARAMETER Storage Temperature Operating Temperature Continuous Input Current AC Output (1) • • -S -TR Surface Mount Option Tape and Reel Option UNIT °C °C mA mA V mW MIN -55 -40 TYP MAX 125 85 40 400 SCHEMATIC DIAGRAM 1 + Input (1) 8 Transient Input Current 2 - Input (1) 7 AC Output (1) Reverse Input Control Voltage Output Power Dissipation 6 500 3 + Input (2) 6 AC Output (2) 4 - Input (2) 5 AC Output (2) APPROVALS rev 2.0 (9/24/04) Solid State Optronics 1.888.377.4776 www.ssousa.com S211 Dual 1 Form A Solid State Relay ELECTRICAL CHARACTERISTICS - 25°C PARAMETER INPUT SPECIFICATIONS LED Forward Voltage LED Reverse Voltage Must Operate Current Junction Capacitance V V mA pF 6 5 1.2 12 2.5 5 1.5 If = 10mA Ir = 10uA Io = 0.8A, resistive load Vf = 0V UNIT MIN TYP MAX TEST CONDITIONS OUTPUT SPECIFICATIONS Blocking Voltage Continuous Load Current Surge Current Rating Holding Current On-Voltage Voltage Across Load at Turn-On Leakage Current Thermal Resistance Power Factor Critical Rate of Rise (dV/dt) V/ µs 400 V A A mA V V µA °C / 100 150 0.3 600 0.8 10 10 1.2 5 250 Io = 0.8A If = 5mA Vo = 250V Io = 600uA If = 5mA T = 16ms COUPLED SPECIFICATIONS Isolation Voltage -H Suffix Isolation Resistance Coupled Capacitance V V GΩ pF 2500 3750 100 6 T = 1 minute T = 1 minute rev 2.0 (9/24/04) Solid State Optronics 1.888.377.4776 www.ssousa.com S211 Dual 1 Form A Solid State Relay PERFORMANCE DATA S211 Typical Load Current vs. Temperature S211 Typical Blocking Voltage Distribution N = 100, Ambient Temperature = 25°C Load Current (mA) 1000 50 Device Count 40 30 20 10 0 620 630 640 650 660 670 680 690 Blocking Voltage (V) 800 600 400 200 0 -40 -20 0 20 40 60 80 Tem perature (C) ZERO-VOLT SWITCHING This solid state relay has been designed with a driver circuit that controls the operation of two back-to-back silicon controlled rectifiers (SCRs), each responsible for one half of the AC cycle. If an AC signal is examined, the turn on, turn off and zero-volt switching can be seen. Figure 1 shows a typical 60 Hz, 120Vac signal with a corresponding relay input signal: 1 Relay Input Signal is Turned On. 5 Relay Input Signal is Turned Off. Input Signal 2 SCR #1 Turns On when 5V threshold is reached. 6 SCR #1 and Relay Turn Off at Zero Volts. 5V Threshold 3 SCR #1 Turns Off, SCR #2 Turns On at Zero Volts. 4 SCR #2 Turns Off, SCR #1 Turns On at Zero Volts. Figure 1 shows the sequence of zero-volt switching operation. At Stage 1, an input signal is applied to the relay. The relay will not turn on until the threshold voltage of 5V is reached. Once this point is reached (Stage 2), SCR #1 (designated as the SCR which controls positive AC voltage) turns on. However, SCR #1 only conducts for an instant, as the cycle quickly crosses zero. At this point (Stage 3), SCR #1 will turn off and SCR #2 (negative AC voltage) turns on. Likewise, at the next zero cross (Stage 4), SCR #2 will turn off and SCR #1 conducts again. Even though the input signal is terminated at Stage 5, the relay will continue to conduct (typical SCR behavior) until Stage 6, when SCR #1 crosses zero and ceases to conduct. Please note that turn on can likewise begin on the negative phase of the AC cycle with a -5V threshold, though only the positive phase is shown here. rev 2.0 (9/24/04) Solid State Optronics 1.888.377.4776 www.ssousa.com S211 Dual 1 Form A Solid State Relay MECHANICAL DIMENSIONS 8 PIN DUAL IN-LINE PACKAGE 8 PIN SURFACE MOUNT DEVICE END VIEW END VIEW TOP VIEW TOP VIEW BOTTOM VIEW/ BOARD PATTERN BOTTOM VIEW/ BOARD PATTERN rev 2.0 (9/24/04) Solid State Optronics 1.888.377.4776 www.ssousa.com