
Allicdata Part #: | 2987121-ND |
Manufacturer Part#: |
2987121 |
Price: | $ 47.12 |
Product Category: | Relays |
Manufacturer: | Phoenix Contact |
Short Description: | PLC-RSP- 72UC/21-21/RW |
More Detail: | Relay Coil |
DataSheet: | ![]() |
Quantity: | 1000 |
10 +: | $ 42.84000 |
Series: | * |
Part Status: | Last Time Buy |
Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us: sales@allicdata.com
Power relays are devices that use an electromagnetic field to switch an electrical circuit between an ON state, when the relay is energized, and an OFF state, when the relay is de-energized. There are a number of different types of power relays, including those rated over 2 Amps. This article will focus on the 2987121 application field and working principles of power relays rated over 2 Amps.
What Is a Power Relay?
A power relay is a type of switch that is operated electromagnetically. It is used to control an electrical circuit by using an electromagnetic field to open and close the contacts between the two states. Power relays require no physical manipulation to move the contacts, as they can be operated remotely or from a switch.
Power relays typically come in two varieties: those rated over 2 Amps, and those rated under 2 Amps. This article will focus on those rated over 2 Amps.
Applications of Power Relays Rated Over 2 Amps
Power relays rated over 2 Amps are used in a variety of applications, including the following:
- Automotive circuits, such as for the horn, lights, air conditioning, power locks, and power windows.
- Circuit protection devices, such as personal computers or other equipment.
- Industrial automation applications.
- Domestic appliance applications, such as refrigerators and dishwashers.
- HVAC (heating, ventilation, and air conditioning;
Working Principles of Power Relays Rated Over 2 Amps
Power relays rated over 2 Amps have two basic working principles. The first is known as the “polarity-based” working principle. This principle is based on the fact that the relay is energized when a positive voltage is applied to the relay’s coil and the relay’s contacts switching to the open state when the voltage is reversed.
The second working principle is known as the “inverse-polarity-based” working principle. This principle is based on the fact that the relay is energized when a negative voltage is applied to the relay’s coil and the relay’s contacts switching to the open state when the voltage is reversed.
Conclusion
In conclusion, power relays rated over 2 Amps are widely used in applications such as automotive circuits, circuit protection devices, industrial automation, domestic appliance applications, and HVAC. They are operated based on the “polarity-based” and “inverse-polarity-based” working principles.
Power relays rated over 2 Amps are reliable and offer a high degree of control and flexibility. This makes them ideal for a variety of applications, from automotive to industrial automation and domestic appliances.
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Part Number | Manufacturer | Price | Quantity | Description |
---|
M39003/01-2987/TR | Vishay Sprag... | 1.17 $ | 1000 | CAP TANT 2.7UF 10% 15V AX... |
70156-2987 | Omron Automa... | 1.39 $ | 1000 | SYSTEM |
2987891 | Phoenix Cont... | 5.2 $ | 1000 | RELAY TIMERRelay Coil |
2987998 | Phoenix Cont... | 5.54 $ | 1000 | RELAY TIMERRelay |
2987024 | Phoenix Cont... | 31.33 $ | 10 | 6.2MM PLC RELAY MODULE 24... |
M39003/01-2987 | Vishay Sprag... | 1.44 $ | 1000 | CAP TANT 2.7UF 10% 15V AX... |
2987286 | Phoenix Cont... | 25.3 $ | 1000 | PLC-INTERFACE CONSISTING ... |
2987943 | Phoenix Cont... | 10.75 $ | 15 | RELAY GEN PURPOSE DPDT 8A... |
2987121 | Phoenix Cont... | 47.12 $ | 1000 | PLC-RSP- 72UC/21-21/RWRel... |
2987930 | Phoenix Cont... | 5.89 $ | 1000 | RELAY TIMERRelay |
2987888 | Phoenix Cont... | 5.19 $ | 22 | RELAY GEN PURPOSE SPDT 16... |
2987095 | Phoenix Cont... | 0.0 $ | 1000 | RELAY GEN PURPOSE SPDT 10... |
2987 | Adafruit Ind... | -- | 33 | HOOK-UP STRND 22 AWG YELL... |
2987150 | Phoenix Cont... | 67.22 $ | 1000 | PLC-RSP-110UC/21-21AU/RWR... |
2987105 | Phoenix Cont... | 53.21 $ | 23 | RELAY GEN PURPOSE DPDT 6A... |
2987037 | Phoenix Cont... | 32.92 $ | 1000 | RELAY GEN PURPOSE SPDT 6A... |
2987914 | Phoenix Cont... | 5.2 $ | 1000 | RELAY TIMERRelay Coil |
IELK11-29871-1-V | Sensata-Airp... | 135.32 $ | 1000 | CIRCUIT BREAKER MAG-HYDR ... |
2987985 | Phoenix Cont... | 4.08 $ | 10 | RELAY TIMERRelay |
2987969 | Phoenix Cont... | 5.94 $ | 5 | RELAY GEN PURPOSERelay ... |
M39003/01-2987/HSD | Vishay Sprag... | 1.49 $ | 1000 | CAP TANT 2.7UF 10% 15V AX... |
2987040 | Phoenix Cont... | 33.61 $ | 1000 | 6.2MM PLC RELAY MODULE 72... |
EK-29878-C05 | Knowles | 0.0 $ | 1000 | MICROPHONE100Hz ~ 10kHz A... |
2987312 | Phoenix Cont... | 40.03 $ | 1000 | PLC-2RSP-24DC/ 1Relay C... |
2987972 | Phoenix Cont... | 5.54 $ | 1000 | RELAY TIMERRelay Coil |
2987309 | Phoenix Cont... | 35.52 $ | 1000 | RELAYRelay Coil |
2987082 | Phoenix Cont... | 0.0 $ | 1000 | CONN TERM BLOCKRelay Co... |
MIKROE-2987 | MikroElektro... | 12.85 $ | 8 | HALL CURRENT 2 CLICKACS71... |
2987927 | Phoenix Cont... | 3.47 $ | 1000 | RELAY TIMERRelay |
2987079 | Phoenix Cont... | 71.93 $ | 9 | RELAY GEN PURPOSE SPDT 10... |
M39003/01-2987H | Vishay Sprag... | 1.44 $ | 1000 | CAP TANT 2.7UF 10% 15V AX... |
IUG66266-29878-1 | Sensata-Airp... | 306.36 $ | 1000 | CIR BRKR MAG-HYDR LEVER |
2987011 | Phoenix Cont... | 28.59 $ | 10 | RELAY GEN PURPOSE SPDT 6A... |
2987901 | Phoenix Cont... | 5.94 $ | 25 | RELAY GEN PURPOSE SPDT 16... |
2987956 | Phoenix Cont... | 3.47 $ | 1000 | RELAY TIMERRelay Coil |
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