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Crydom Relay  Solid-state Relays (SSRs) are electronic switching devices that accept a time proportioned or on /off signal from a controller. Rapid cycling can wear out electromechanical relay, whereas SSRs operate at much smaller cycle times. Therefore, SSRs can be employed where extremely tight process control is required and when durability is a necessity. The life of a heating element is increased considerably when the on/off cycle that is used to time-proportion the heater is kept at 1 or 2 seconds, or less, thus reducing the thermal expansion and contraction of element. The fast cycling SSRs ensure longer heater life at lower cost. In addition, temperature control is optimized with the faster cycling SSRs compared to electromechanical relays. Since SSRs have no moving parts, mechanical failure is eliminated. They are resistant to shock and vibration and are durable if operated within the tolerable ambient temperatures. Heat sinks will efficiently dissipate the heat thereby increasing each unit�s life. Relays are compact, typically measuring 58.4 (H) x 45.7 (W) x 22.9 (D) mm. Crydom Relays 120/240 VOLT
AC OUTPUT - Zero Voltage and Random turn-on Switching
- Panel Mount
Featuring state-of-the-art Surface Mount Technology, these SPST-NO relays delivers proven reliability in the most demanding applications. Output consists of an SCR AC switch and is available in zero-cross, random turn-on (phase controllable) and normally closed (Form B) versions with either AC or DC input (coil) control.
DC CONTROL - SCR OUTPUT | Crydom Model Number | Line Voltage Range (Vac) | Load Current Range (Arms) | Control Voltage Range (Vdc) | Control Current @ 5Vdc (mA) | Must Release Voltage (Vdc) | Surge Current 1-Cycle (Apk) | D2410 | 24-280 | .04-10 | 3-32 | 3.4 | 1.0 | 120 | D2425 | 24-280 | .04-25 | 3-32 | 3.4 | 1.0 | 250 | D2450 | 24-280 | .04-50 | 3-32 | 3.4 | 1.0 | 625 | AC CONTROL - SCR OUTPUT | Crydom Model Number | Line Voltage Range (Vac) | Load Current Range (Arms) | Control Voltage Range (Vac) | Control Current @120Vac (mA) | Must Release Voltage (Vac) | Surge Current 1-Cycle (Apk) | A2410 | 24-280 | .04-10 | 90-280 | 2.0 | 10.0 | 120 | A2425 | 24-280 | .04-25 | 90-280 | 2.0 | 10.0 | 250 | * A2450 | 24-280 | .04-50 | 90-280 | 2.0 | 10.0 | 625 | * Stocked as A2440 with same specification. |
GENERAL SPECIFICATIONS Operating Temperature Range: | -40 � to 80� C | Isolation Voltage: | 4000 Vrms | Minimum Off-State dv/dt: | 500V/ m sec |
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