Tag Archives: Relay

DC Output Solid State Relay

DC_Solid_State_Relay_I052A

DC Output Solid State Relay 10Amps 60V DC (Optically Isolated Input)

This project has been designed around TLP250/352 which is Opto-Coupler IGBT/MOSFET Gate Driver from Toshiba and Mosfet IRFP260 from IR, This relay consists of optically isolated gate driver and low impedance Mosfet. The combination of low resistance and high load current handling capabilities make this Relay suitable for a variety of switching applications. These devices are ideally suited for controlling high voltage and current DC loads with solid state reliability while providing 3750V isolation from input to output.

A solid-state relay (SSR) is an electronic switching device that switches on or off when a small external voltage is applied across its control terminals. SSRs consist of a Opto-isolator which responds to an appropriate input (control signal), a solid-state electronic switching device which switches power to the load circuitry, and a coupling mechanism to enable the control signal to activate this switch without mechanical parts. This relay designed to switch DC Load up to 10Amps. It serves the same function as an electromechanical relay, but has no moving parts. Solid-state relays have fast switching speeds compared with electromechanical relays, and have no physical contacts to wear out. Input trigger voltage 3V to 9V DC (1.5V to 12 V with Transistor) and output load 10Amps and supply 12V to 60V DC (100V DC also Possible). Gate Driver required supply 12V to 18V DC. Heat sink required for peak load.

DC Output Solid State Relay – [Link]

AC Solid State Relay

Solid_State_Relay_IMG2

This simple circuit designed around Solid State Relay S216S02 from SHARP. The S216S02 solid State Relay (SSR) is an integration of an infrared emitting diode (IRED), a Phototraic Detector and a main output Traic. These devices are ideally suited for controlling high voltage AC loads with solid state reliability while providing 4KV isolation from input to output.

A solid-state relay (SSR) is an electronic switching device that switches on or off when a small external voltage is applied across its control terminals. SSRs consist of a opto-isolator which responds to an appropriate input (control signal), a solid-state electronic switching device which switches power to the load circuitry, and a coupling mechanism to enable the control signal to activate this switch without mechanical parts. This relay designed to switch either AC load up-to 1KW. It serves the same function as an electromechanical relay, but has no moving parts. Solid-state relays have fast switching speeds compared with electromechanical relays, and have no physical contacts to wear out.

AC Solid State Relay – [Link]

Light and Dark Sensitive Switch

Light_Switch_Photo

Light / Dark Sensitive Switch project is a simple project which operates a relay when the light falling on the LDR goes below or goes above a set point.

  • Input – 12 V @ 50 mA
  • Relay output – SPDT relay
  • 2-in-1 kit, either as light sensitive kit or dark sensitive switch
  • Onboard preset to set the level
  • Power-On LED indicator
  • Relay On LED indicator
  • Power Battery Terminal (PBT) for easy relay output connection
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 50 mm x 54 mm

Light and Dark Sensitive Switch – [Link]

Large Current Relay Driver

I045A

This is a large current Relay module with single pole double throw switch which provides normally closed and normally open operations. The Relay is the most common used module in application such as home automation, industrial automation, and machine on/off. Sometimes you need to control large current such as the fans, lights, water heaters, room heaters, Air-conditioning, vacuum pumps That is what this Large Current Relay Module can be helpful to drive such high current load with just TTL signal. Easy interface with embedded systems and micro-controllers.

Features

  • Supply 12V DC
  • Current 190mA
  • Trigger Supply 3 to 8V DC
  • Optically isolated input for safety and noise immunity
  • 7 Pin Header for Inputs and 5V DC output
  • 3 Pin screw Terminals for Relay output

Large Current Relay Driver – [Link]

Single Channel SMD Relay Driver

I040B

Single Channel Relay Board is a simple and convenient way to interface a relay for switching application in your project.

Specifications

  •     Input supply 12VDC @ 42 mA
  •     On Board 5V Regulator provides 5V output
  •     Output SPDT Relay
  •     Relay specification 5 A @ 230 VAC
  •     Trigger level 2 ~ 9 VDC
  •     Header connector for connecting power and trigger voltage
  •     Relay operations status LED
  •     Power LED
  •     Tiny Design
  •     Screw terminal connector for easy relay output connections

Single Channel SMD Relay Driver – [Link]

WIFI based appliance module using the ESP8266 and a latching relay

relayboard-600x337

Steve writes:

This is an WIFI-based appliance module using the ESP8266 (ESP12) and a latching relay. The appliance module is powered from the AC line using an inexpensive 5V 1AMP universal input power supply which is attached to the board. There are provisions for local control using a pushbutton switch, and there is an option for a WIFI status LED. The firmware is written in C and the appliance module is controlled using MQTT and JSON.

WIFI based appliance module using the ESP8266 and a latching relay – [Link]

Multi-pole industrial relays provide more possibilities

obr1484_uvod

Switching of three-phase motors or a realization of a sophisticated installation is a breeze with industrial relays Finder.

As we know, a relay is a very versatile component, able to realize also various “sequential” circuits, when for example by switching one relay we´ll switch on a target device and at the same time we´ll enable (or disable) switching of another relay. In these case, it´s an often demand for a relay to have a sufficient number of poles. Majority of such “logic” circuits can be realized even with a common 1-2 pole relays, but it´s not always economical and it also brings another costs for solution of supplying and protection of logic circuits.

Industrial relays Finder series „55“ and „60“ are suitable for a construction of such more complex circuits or for switching of three phase devices.

  • Finder 55 – miniature industrial relay for a PCB or for socket, 2-4 poles, 7-10A (switching current up to 20A), 250/400VAC,
  • Finder 60 – a more robust industrial relay for a socket, 2-3 poles, 10A (switching current up to 20A), 250/400VAC,

Continue reading Multi-pole industrial relays provide more possibilities

Does a universal signal relay exist?

obr1543_1

To tell the truth, probably no, but we have for you a few hints for relays which are very close to an ideal.

Signal relay is almost an „ideal component“ thanks to a practically zero distortion and a total isolation of a switched signal from a control one. That is naturally one of the main features of all electromechanical relays, but at signal relays it´s especially valued, as we usually require switching of relatively small signals. Favorite and widely used are for example relays Fujitsu series B3 and B4 (miniature SMT and THT relays) and series AxW (miniature only 5mm high relay) – all with bifurcated gold-plated contacts for a high reliability.

A novelty in our portfolio is the series Fujitsu NA representing something like a “golden middle way “. With dimensions 7,4×14,9×9,7 mm it belongs to narrow miniature relay enabling a high density of components on a PCB. Even though relay NA is somewhat bigger than for example series B4, but it´s able to withstand higher AC current – up to 0.5A/125VAC (vs. 0.3A at series B4) and it also provides an extreme mechanical lifetime up to 100×106 , what´s approximately twice that of B4 series. Sensitive coils, with a consumption of 0.1-0.3W at majority of types enable a dense mounting without problems with overheating.

From the point of view of the lowest possible consumption are naturally the best latching relays (with a permanent magnet) controlled only by pulses. Usually they´re easy to recognize by a letter „L“ behind the series marking (for example NAL, JSL). In a Fujitsu signal relays overview and the Fujitsu catalogue can be easily found a comparison among particular types as well as detailed information about them. We try to keep the most favorite types always on stock, what´s also reflected in the substantial increasing of stock.


Does a universal signal relay exist? – [Link]

CRYDOM – solid state relays from specialists

obr1675_1

Silent operation, immunity against mechanical shocks and magnetic field and other factors make a solid state relay the best choice for many applications.

Where to start? We´ll try to name “pluses” of solid state relays – SSR:

  • long lifetime, no moving parts, no contact burning
  • silent operation, very desirable for commercial and medical applications
  • minimum electrical noise thanks to a possibility of zero-crossing switching
  • easy control (interfacing) and minimum energy consumption to control
  • resistance to shocks and vibrations, installation in any position
  • fast switching (approx. 0.1 ms)
  • low weight
  • immunity to outer magnetic field (usable near powerful motors,…)

Some disadvantage of SSR is, that they generate more heat when conducting a current through “contacts”, than classic EMR. But this is dependent on a switched current. On the other hand – power consumption of the SSR itself is minimal in comparison to EMR of a similar size.

From above mentioned features result, that SSRs are a great choice everywhere, where it´s necessary to switch frequently and/or also to change rotation of motors (integrated in a single component). SSRs are also maximally suitable for switching of DC currents (solar applications, batteries,…) as they don´t suffer by arcing and contact wearing like classic EMRs (DC arcing is much more difficult to extinguish than the AC one). Much longer lifetime in comparison to EMRs result in very low operation/ service costs and significantly eliminates losses caused by eventual downtimes.

If we allured you to SSR, than it´s certainly worth to take a look at products of a leading producer in this field – výrobky spoločnosti CRYDOM, which specializes for development and production of SSRs already for over 40 years. Among novelties in our stock can be found Crydom SSR for PCB in SIP and miniSIP packages, panel mount types, as well as types for a DIN-rail mount. Their basic features are very similar, they differ mainly in max. voltage and current, which they´re able to switch.

Practically each SSR Crydom is available for switching of AC or DC current and also in an “R” version (random switching in any phase of AC voltage) or „ZCD – zero crossing“ switching in “zero” (suitable for minimizing of switching noise).

Detailed specification can be found in the datasheets at jednotlivých typoch and a help at selecting will provide you documents Crydom overview, Crydom product guide, Crydom Selecting SSR and Crydom motion control. The „SSR-the inside story” document is intended for those of you, who like to understand components deeply.


CRYDOM – solid state relays from specialists – [Link]

2 Channel Relay Board

2_Channel_Relay_Board_PIC

2 channel Relay driver project can be controlled by feeding 2-12V trigger voltage, Very useful project for application like Micro-Controller based projects, Remote controller, Lamp on Off, and any circuits which required isolated high current and high voltage switching by applying any TTL or CMOS level voltage. Two LED works as operation indicator while in , 3 pins screw terminals to connect load and provides both normally open and normally closed switching.

Input: 12 VDC @ 84 mA
Output: Two SPDT relay
Relay specification: 5 A @ 230 VAC
Trigger level : 2 to 12 VDC
Header connector for connecting power and trigger voltage
LED on each channel indicates relay status
Power Battery Terminal (PBT) for easy relay output connection
Four mounting holes of 3.2 mm each
PCB dimensions 49 mm x 68 mm

2 Channel Relay Board – [Link]