We offer low cost, fast and the most powerful DC/AC Solid State Relays and Breakers in their class 

With respect to the growing needs for the replacement of low-speed, power-hungry and bulky electro-mechanical relays, EDR Inc. has introduced several families of high-speed, powerful and inexpensive Solid State Relays (SSR) with MOSFETs and IGBTs on there output(s) to commutate either DC or AC/DC power. The advantages of a solid-state relay over an electromechanical relay are well described in modern publications. These included the absents of moving parts to wear out, no acoustical noise, low controlling power, no contact bounce or arching, minimal space requirements and a long life expectancy. Mostly a high-power, DC-type SSR costs less than a comparable electromechanically relay. The situation is different for a low power AC-type electromechanical relay that costs, in some cases, much less than a SSR. The choice might look obvious. Though simple calculations that take things into consideration such as a relays life expectancy, the loss of production time, the cost of replacements and shipping expenses plus the labor cost of replacing a wore out relay could make the SSR the prime choice in new designs and retrofits. 

EDR’s Solid State Relays are potted in a thermo-conductive epoxy for optimal performance in today's very demanding industrial and military environments. Most relays are produced in three popular sizes: D2-type (1.15”H x 1.78L” x 0.4”W), D3-type (1.15”H x 1.78”L x 0.8”W) and D4-type (1.15”H x 2.0”L x 0.9”W) with currents ranging from 2A up to 76A and voltages from 40V to 1,700V. These relays have configurations with SPST, DPST, 3PST or TOTEM outputs. We do not charge a set-up fee for a custom relay to meet your specifications for orders of 250 or more.

Along with SSRs, we manufacture a Solid State Power Controller (SSPC) or an AC/DC Intelligent Solid-State Relay/Breaker (iSSR\Breaker) to be used in Aircraft and Naval 115VAC/190VDC applications. This DPST (double pole, single throw) module (EDR82360) has integrated sensing capabilities to protect itself from over current and over temperature while exhibiting the properties of a time-delay fuse. Electronically controllable for a faster and more reliable power management, the EDR82360 was designed to replace 4 components: an electromechanical or SSR relay, a switch, and a fuse with a fuse holder.

Solid State Relays manufactured by EDR fall into one of following categories:

1.        Direct driving, super-low cost, comparable to the speed of an electromechanical relay

2.        Direct driving, medium speed and medium cost

3.        With a built-in DC/DC converter and independent controls, a high-speed and medium cost

4.        Direct driving, super-fast type that is capable of delivering 100Amps in a microsecond   

DIN Rail (socket) & Drivers

There are four types of DIN Rail mounting assemblies available to fit a vast variety of industrial modules, such as IOC, ODC, D2W, CX, CMS and any of the D2N & D3N SSR packages made by EDR. These DIN modules provide excellent isolation of 3000V between the interfacing circuitry and field devices. They are designed to accommodate powerful and high-speed SSRs and control up to 14Amps on the standard model and 28Amps for more power-hungry applications. There are four types of DIN RAILs assemblies are available:

• Direct driving with a LED to indicate the presence of a control signal (EDR82555),
• With a driver and optional de-bouncing circuitry (EDR82558 and EDR82558/D respectfully) for better noise and bouncing rejections,
• With a high-speed driver for applications such as the ability to enable the delivery of a very short of burst of power, PWM and other high frequency applications (EDR82360),
• With a built-in latchable driver (EDR82604) for easy interfacing with push-on and push-off type of industrial applications.