S742 1 Form A Solid State Relay DESCRIPTION The S742 is a bi-directional, single-pole, single-throw, normally open multipurpose relay. The circuit is composed of one LED on the input side which activates an optically coupled IC on the output - 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 • Zero-Volt Cross Switching • Valve control • High transient immunity • Solenoids • 600V blocking voltage • Home appliances • 1.2A maximum continuous current • Metering equipment • High input-to-output isolation (3.75kV MIN) • Heating elements • Solid state reliability • RoHS / Pb-Free / REACH Compliant OPTIONS/SUFFIXES* • -S Surface Mount Leadform Option (25 pcs / tube) • -TR Tape and Reel Packing Option (1,000 pcs / reel) NOTE: Suffixes listed above are not included in marking on device for part number identification. SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS* PARAMETER UNIT MIN TYP MAX Storage Temperature °C -55 125 Operating Temperature °C -40 85 Continuous Input Current mA 40 Transient Input Current mA 400 Reverse Input Control Voltage V Output Power Dissipation W 1.2 Solder Temperature Wave (10s) ºC 260 Solder Temperature - IR Reflow (10s) ºC 260 6 *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 Ratings may cause permanent damage to the device and may adversely affect reliability. APPROVALS • © 2011 Solid State Optronics • San José, CA www.ssousa.com • +1.408.293.4600 Page 1 of 5 UL Approved: File #E90096 S742 rev 1.44 (2/4/2011) S742 1 Form A Solid State Relay ELECTRICAL CHARACTERISTICS - 25°C PARAMETER UNIT MIN TYP MAX 1.2 1.5 TEST CONDITIONS INPUT SPECIFICATIONS LED Forward Voltage V V Turn On Current (Resistive Load) mA 5 6.5 Io = 1.2A Turn On Current (Inductive Load) mA 10 12 Io = 300µA (AC) pF 5 Junction Capacitance 6 12 If = 10mA LED Reverse Voltage Ir = 10uA Vf = 0V OUTPUT SPECIFICATIONS Blocking Voltage V Continuous Load Current 600 A 1.2 If = 6.5mA Surge Current Rating A 10 t = 16ms Holding Current mA 10 On-Voltage V 1.2 Io = 1.2A Zero Cross Turn On Threshold Voltage V 5 If = 6.5mA Leakage Current µA 250 Vo = 250V Thermal Resistance ºC / W 100 80 Power Factor 0.3 1 Critical Rate of Rise (dV/dt) 400 V/ µs See Note 1 below COUPLED SPECIFICATIONS Isolation Voltage V 3750 Isolation Resistance GΩ 100 Coupled Capacitance pF t = 1 minute 6 Note 1: Snubber circuits may be required for lower power factors © 2011 Solid State Optronics • San José, CA www.ssousa.com • +1.408.293.4600 Page 2 of 5 S742 rev 1.44 (2/4/2011) S742 1 Form A Solid State Relay S742 S742 Maximum Load Current vs. Temperature Typical Blocking Voltage Distribution N = 100, Ambient Temperature = 25°C Device Count) 1500 1000 500 40 30 20 10 0 600 610 620 630 640 650 660 670 80 60 40 20 0 -2 0 0 -4 0 Load Current (mA) PERFORMANCE DATA Blocking Voltage (V) 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: 5 Relay Input Signal is Turned On. 1 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 4 SCR #1 Turns Off, SCR #2 Turns On at Zero Volts. 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. © 2011 Solid State Optronics • San José, CA www.ssousa.com • +1.408.293.4600 Page 3 of 5 S742 rev 1.44 (2/4/2011) S742 1 Form A Solid State Relay MECHANICAL DIMENSIONS 16 PIN DUAL IN-LINE PACKAGE 16 PIN SURFACE MOUNT DEVICE END VIEW END VIEW TOP VIEW TOP VIEW © 2011 Solid State Optronics • San José, CA www.ssousa.com • +1.408.293.4600 Page 4 of 5 S742 rev 1.44 (2/4/2011) S742 1 Form A Solid State Relay DISCLAIMER Solid State Optronics (SSO) makes no warranties or representations with regards to the completeness and accuracy of this document. SSO reserves the right to make changes to product description, specifications at any time without further notice. SSO shall not assume any liability arising out of the application or use of any product or circuit described herein. Neither circuit patent licenses nor indemnity are expressed or implied. Except as specified in SSO's Standard Terms & Conditions, SSO disclaims liability for consequential or other damage, and we make no other warranty, expressed or implied, including merchantability and fitness for particular use. LIFE SUPPORT POLICY SSO does not authorize use of its devices in life support applications wherein failure or malfunction of a device may lead to personal injury or death. Users of SSO devices in life support applications assume all risks of such use and agree to indemnify SSO against any and all damages resulting from such use. Life support devices are defined as devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when used properly in accordance with instructions for use can be reasonably expected to result in significant injury to the user, or (d) a critical component in any component of a life support device or system whose failure can be reasonably expected to cause failure of the life support device or system, or to affect its safety or effectiveness. © 2011 Solid State Optronics • San José, CA www.ssousa.com • +1.408.293.4600 Page 5 of 5 S742 rev 1.44 (2/4/2011)