Relay is an switch that operates electrically. Being called a switch because the relay has two states ON and OFF. The relay in ON or OFF state depends on whether the current flows through the relay or not.
Operating principles of the Relay
When there is current flowing through the relay, this current will flow through the inner coil and create a suction magnetic field. This suction field acts on an internal lever that closes or opens the electrical contacts and thus changes the state of the relay. The number of electrical contacts changed may be 1 or more, depending on the design.
Relays with 2 circuits operate independently. One circuit is to control the coil of the relay: Whether or not the current runs through the coil, or means that the relay is in ON or OFF state. The other controls the current we need to control passes the relay or not based on the status of ON or OFF of the relay.
There are lots of IDEC relay series such as:
RJ series (Slim Power Relays)
RU series (Universal Relays)
RY series (Miniature Relays, 4 poles, economic)
RM series (Miniature Relays, 2 poles, economic)
RR series (Heavy-duty power relays, Pin-type terminal)
RH series (Heavy-duty power relays, Blade-type terminal)
RJ series, RU series, RY series are the most common.
RJ series
IDEC RJ Relay
– Compact design, thickness is only 12.7 mm
– Withstands large currents:
+ RJ1S( 1 pole) : 12 A
+ RJ2S( 2 poles) : 8 A
– The number of mechanical opening and closing times is very high
– Number of times of electric opening and closing: 200,000 (AC load)
– Number of mechanical opening and closing times: 30,000,000 (AC load)
– Eco-friendly design, according to RoSH standards
– Does not contain toxic substances such as: Lead, Mercury, PBB, Chromium …
Built-in diode to resist reverse voltage up to 1000V
1. Choosing product code.
| type | 1 pole ( 1 pair of contact) | 2 poles ( 2 pairs of contact) | ||
| type | product code | type | product code | |
| standard type ( built-in Led) | RJ1S-CL * |
A24 |
RJ2S-CL * |
A24 |
| simple type ( without Led) | RJ1S-C- * | RJ2S-C- * | ||
| with-diode type ( DC coil) built-in Led A1: – A2: + | RJ1S-CLD- * |
D12 |
RJ2S-CLD- * |
D12 |
| with-diode type ( DC coil) built-in Led A1: – A2: + | RJ1S-CD- | RJ2S-CD- | ||
2. Contact.
| No. of Poles |
contact | Allowable Contact Power | Rated Load | Allowable Switching Current |
Allowable Switching Voltage |
Minimum ApplicableLoad (Note) | |||
| Resistive Load | Inductive Load |
Voltage | Resistive Load | Inductive Load cos Ø=0.3 L/R=7ms |
|||||
| 1 | NO | 3000VA AC 360W DC |
1875VA AC 180W DC |
250VAC | 12A | 7.5A | 12A | 250V AC 125V DC |
5V DC, 100mA |
| 30VAC | 12A | 6A | |||||||
| NC | 3000VA AC 180W DC |
1875VA AC 90W DC |
250VAC | 12A | 7.5A | ||||
| 30VAC | 6A | 3A | |||||||
| 2 | NO | 2000VA AC 240W DC |
1000VA AC 120W DC |
250VAC | 8A | 4A | 8A | 250V AC 125V DC |
5V DC, 10mA |
| 30VAC | 8A | 4A | |||||||
| NC | 2000VA AC 120W DC |
1000VA AC 60W DC |
250VAC | 8A | 4A | ||||
| 30VAC | 4A | 2A | |||||||
3.Specifications
| Model | RJ1S | RJ2S |
| Number of Poles | 1-pole | 2-pole |
| Type of contact | 1-pair of contact (1NO+1NC) | 2 pairs of contact (1NO+1NC) |
| Contact Material | Hợp kim Bạc và Nikel | |
| Degree of Protection | IP40 | |
| Operate Time | 15 ms maximum | |
| Release Time | 10 ms maximum ( With diode: 20 ms maximum) | |
| Electrical Life (rated load) | AC load: 200,000 operations minimum DC load: 100,000 operations minimum |
|
| Mechanical Life (no load) | AC coil: 30,000,000 operations minimum DC coil: 50,000,000 operations minimum |
|
| Operating Temperature | –40 to +70°C (no freezing) | |
| Operating Humidity | 5 to 85% RH (no condensation) | |
| Weight (approx.) | 19g | |
4.Dimension:
5. Internal Connection Diagrams
RU series
RU Series Relay
– Designed complies strictly with environmental standards.
– Simple design, compact, do not use wires inside.
– Easily distinguish the voltage of the coil by distinguishing the color on the front of the relay.
– Maximum contact ratings: 10A (RU2), 6A (RU4), 3A (RU42)
– UL, CSA, c-UL, EN compliant
– Two terminal styles::
+ plug-in.
+ PCB mount.
1. Learning about the non-electric test function.
| Termination | Latching Lever | style | Part No. 4PDT |
Coil Voltage Code | |
| 2 pairs of contact | 4 pairs of contact | ||||
| Plug-in Terminal | With Latching Lever | Standard | RU2S-* | RU4S-* | A24, A100, A110, A200, A220 D6, D12, D24, D48, D110 |
| with diode | RU2S-D-* | RU4S-D-* | D6, D12, D24, D48, D110 | ||
| Without Latching Lever | Standard | RU2S-C-* | RU4S-C-* | A24, A100, A110, A200, A220 D6, D12, D24, D48, D110 |
|
| with diode | RU2S-CD-* | RU4S-CD-* | D6, D12, D24, D48, D110 | ||
| PCB Terminal | Without Latching Lever | Note: 1 | RU2V-NF-* | RU2V-NF-* | A24, A100, A110, A200, A220 D6, D12, D24, D48, D110 |
Note 1: Simple types do not have an LED indicator, a mechanical indicator, and a latching lever.
2. Coil Ratings
| Rated Voltage (V) | Coil Voltage Code |
Rated Current (mA) ±15% (at 20°C) |
Coil Resistance (Ω) ±10% (at 20°C) |
Operating Characteristics (against rated values at 20°C) | ||||
| 50 Hz | 60 Hz | Maximum Continuous Applied Voltage |
Minimum Pickup Voltage |
Dropout Voltage | ||||
| AC (50/60 Hz) | 24 | A24 | 49.3 | 42.5 | 164 | 110% | 80% maximum | 30% maximum |
| 100-110 | A100 | 9.2-11.0 | 7.8-9.0 | 3,460 | ||||
| 110-120 | A110 | 8.4-10.0 | 7.1-8.2 | 4,550 | ||||
| 200-220 | A200 | 4.6-5.5 | 4.0-4.6 | 14,080 | ||||
| 220-240 | A220 | 4.2-5.0 | 3.6-4.2 | 18,230 | ||||
| DC | 6 | D6 | 155 | 40 | 110% | 80% maximum | 10% | |
| 12 | D12 | 80 | 160 | |||||
| 24 | D24 | 44.7 | 605 | |||||
| 48 | D48 | 18 | 2,560 | |||||
| 100 | D100 | 9.7 | 10,000 | |||||
| 110 | D110 | 8.9 | 12,100 | |||||
3. Contact Ratings
| Contact | Continuous Current |
Allowable Contact Power | Voltage (V) |
Rated Load | |||
| Resistive Load |
Inductive Load |
Res. Load |
Ind. Load |
Electrical Life (operations) |
|||
| DPDT (RU2) | 10A | 2500VA AC 300W DC |
1250VA AC 150W DC |
250 AC | 10A | 5A | 100,000 min |
| 5A | – | 500,000 min | |||||
| – | 2 | 300,000 min | |||||
| 30 DC | 10A | 5A | 100,000 min | ||||
| 5A | – | 500,000 min | |||||
| – | 2.5A | 300,000 min | |||||
| DPDT (RU4) | 6A | 1500VA AC 180W DC |
600VA AC 90W DC |
250 AC | 6A | 2.6A | 50,000 min |
| 3A | 0.8A | 200,000 min | |||||
| 30 DC | 6A | 2.7A | 50,000 min | ||||
| 3A | 1.5A | 200,000 min | |||||
| 110 DC | 0.65A | 0.33A | 50,000 min | ||||
| 0.33A | 0.18A | 200,000 min | |||||
4. Specifications.
| Model | RU2 (DPDT) | RU4 (4PDT) |
| Contact Material | Silver alloy | Silver (gold clad) |
| Contact Resistance |
50 mΩ | |
| Minimum Applicable Load |
24V DC, 5mA | 1V DC, 1 mA |
| Operate/release Time | 20 ms maximum | |
| Power Consumption |
AC: 1.1 to 1.4VA (50Hz), 0.9 to 1.2 VA (60Hz) DC:0.9 to 1.0W |
|
| Operating Frequency |
Electrical: 1800 operations/h maximum Mechanical: 18,000 operations/h maximum |
|
| Mechanical Life | Ac: 50,000,000 operations DC: 100,000,000 operations |
|
| Operating Temperature |
PCB terminal: –55 to +70°C (no freezing) Others: –55 to +60°C (no freezing) |
|
| Operating Humidity | 5 to 85% RH | |
| Storage Temperature | -55 to +70ºC RH | |
| Storage Humidity | 5 to 85% RH | |
| Weight | 35g | |
5. Dimensions.
Internal Connection.
Relay RY Series
RY Series Relay
– RY Relay is designed to be compact with a contact capacity of 3A.
– All 4PDT relay series have electric arc chamber, built-in reverse polarity diode.
– Designed according to UL508, CSA C22.2, EN61810-1 standards.
1.Summary of RY series relay:
Terminal |
Style | DPDT | 4PDT | ||
| Part No. | Coil Voltage Code ∗ | Part No. | Coil Voltage Code ∗ | ||
| standard | Basic | RY2S-U* |
AC6, AC12, |
RY4S-U* | AC6, AC12, AC24, AC50, AC100-110, AC110-120, AC200-220, AC220-240 DC6, DC12, DC24, DC48, DC100-110 |
| Basic | RY2S-UL-* | RY4S-UL* | |||
| With Reverse Polarity Indicator |
RY4S-UL1* | ||||
| With Diode | RY2S-UD-* | RY4S-UD-* | DC6, DC12, DC24, DC48, DC100-110 |
||
| With Indicator and Reverse Polarity Diode |
RY2S-ULD-* | RY4S-ULD-* | |||
2. Coil Ratings
| Rated Voltage (V) | Rated Current (mA) ±15% at 20°C | Coil Resistance (Ω) ±10% at 20°C |
Operation Characteristics (against rated values at 20°C) | ||||||||
| DPDT | 4PDT | 50 Hz | 60 Hz | Max. Continuous Applied Voltage |
Min. Pickup Voltage |
Dropout Voltage | |||||
| DPDT | 4PDT | DPDT | 4PDT | SPDT | 4PDT | ||||||
| AC (50/60 Hz) | 6 | 6 | 170 | 240 | 150 | 200 | 18.8 | 9.34 | 110% | 80% maximum | 30% maximum |
| 12 | 12 | 86 | 121 | 75 | 100 | 76.8 | 39.3 | ||||
| 24 | 24 | 42 | 60.5 | 37 | 50 | 300 | 152 | ||||
| 50 | 50 | 20.5 | 28.9 | 18 | 24 | 1,280 | 676 | ||||
| 100 | 100-110 | 10.5 | 10.3-11.8 | 9 | 9.1-10 | 5.220 | 3.360 | ||||
| 110 | – | 9.6 | – | 8.4 | – | 6.950 | – | ||||
| 115 | 110-120 | 8.9 | 9.4-10.8 | 7.8 | 8-9.2 | 7,210 | 4,290 | ||||
| 120 | – | 8.6 | – | 7.5 | – | 8,100 | – | ||||
| 200 | 200-220 | 5.6 | 5.1-5.9 | 4.9 | 4.3-5 | 21,442 | 13,690 | ||||
| 220 | – | 4.7 | – | 4.1 | – | 25,892 | – | ||||
| 230 | 220-240 | 4.7 | 4.7-5.4 | 4.1 | 4-4.6 | 26,710 | 28,820 | ||||
| 240 | – | 4.9 | – | 4.3 | – | 26,710 | – | ||||
| DC | DPDT | 4PDT | DPDT | 4PDT | DPDT | 4PDT | 110% | 80% maximum | 10% | ||
| 6 | 6 | 128 | 150 | 47 | 40 | ||||||
| 12 | 12 | 64 | 75 | 188 | 160 | ||||||
| 24 | 24 | 32 | 36.9 | 750 | 650 | ||||||
| 48 | 48 | 18 | 18.5 | 2,660 | 2,600 | ||||||
| 100 | 100-110 | 10 | 8.2-9 | 10,000 | 12,250 | ||||||
| 110 | – | 8 | – | 13,800 | – | ||||||
3. Specifications
| Contact | Standard Contact | |
| DPDT | 4PDT | |
| Contact Material | Gold-plated silver | |
| Contact Resistance | 50 mΩ | |
| Minimum Applicable Load | 5V DC, 10 mA | 1V DC, 1 mA |
| Operate/release Time | 20 ms | |
| Power Consumption (approx.) |
AC: 1.1 VA (50 Hz), 1VA (60 Hz) DC: 0.8 W |
AC: 1.4 VA (50 Hz), 1.2 VA (60 Hz) DC: 0.9 W |
| Operating Frequency | Electrical: 1,800 operations/h maximum Mechanical: 18,000 operations/h maximum |
|
| Mechanical Life | 50,000,000 operations | |
| Operating Temperature | 200,000 operations (220V AC, 3A) | |
| Operating Humidity | -25 to +50ºC | |
| Storage Temperature | -55 to +70ºC | |
| Storage Humidity | 45 to 85% RH | |
| Weight (approx.) | 23g | |
4. Dimension & Internal Connection:
RM Series Relay
– Only 2 pairs of contact type: ( 2NO + 2NC).
– Compact miniature size saves space
– Options include indicators and check buttons.
– Relay RM series has 2 type:
+ Plug-in.
+ PC board.
– Strictly follow the standards: UL508, CSA C22.2 No .14.
1. Choosing Product code
| style | Plug-in Terminal | PC Board Terminal | ||
| Part No. | Coil Voltage Code | Part No. | Coil Voltage Code | |
| standard | RM2S-U | AC6, AC12, AC24, AC50, AC100-110, AC110-120, AC200-220, AC220-240 DC6, DC12, DC24, DC48, DC100-110 |
RM2V-U | AC6, AC12, AC24, AC50, AC100-110, AC110-120, AC200-220, AC220-240 DC6, DC12, DC24, DC48, DC100-110 |
| With Indicator | RM2S-UL | RM2V-UL | ||
| With Diode (DC coil only) |
RM2S-UD | DC6, DC12, DC24, DC48, DC100-110 | – | – |
| With Indicator and Diode (DC coil only) |
RM2S-ULD | – | – | |
When selecting the item code, it is necessary to specify the item code and coil voltage:
For example:
Part No. Coil Voltage Code
RM2S-U AC100-110
2. Coil Ratings
| Rated Voltage (V) | Rated Current (mA) ±15% at 20°C | Coil Resistance (Ω) ±10% at 20°C |
Operation Characteristics (against rated values at 20°C) |
||||
| 50 Hz | 60 Hz | Max. Continuous Applied Voltage |
Min. Pickup Voltage | Dropout Voltage | |||
| AC ( 50/60 Hz) | 6 | 240 | 200 | 9.4 | 110% | 80% maximum | 30% maximum |
| 12 | 121 | 100 | 39.3 | ||||
| 24 | 60.5 | 50 | 153 | ||||
| 50 | 28.9 | 24 | 680 | ||||
| 100-110 | 10.3-11.8 | 9.1-10 | 3,360 | ||||
| 110-120 | 9.4-10.8 | 8.2-9.2 | 4,290 | ||||
| 200-220 | 5.1-5.9 | 4.3-5 | 13,690 | ||||
| 220-240 | 4.7-5.4 | 4.0-4.6 | 18,820 | ||||
| DC | 6 | 150 | 40 | 110% | 80% maximum | 10% | |
| 12 | 75 | 160 | |||||
| 24 | 37.5 | 640 | |||||
| 48 | 18.8 | 2,560 | |||||
| 100-110 | 8.2-9.0 | 12.250 | |||||
3. Contact Ratings
| contact | Continuous Current |
Allowable Contact Power | Voltage | Rated Load | ||
| Resistive Load |
Inductive Load |
Res. Load |
Ind. Load |
|||
| DPDT (RM2) | 5A | 1100VA AV 150W DC |
440VA AC 75W DC |
110V AV | 5A | 2.5A |
| 220V AC | 5A | 2A | ||||
| 30 DC | 5A | 2.5A | ||||
4. Specifications
| Contact Material | silver |
| Contact Resistance | 30 mΩ |
| Minimum Applicable Load |
5V DC, 1 mA |
| Operate Time | 20 ms |
| Power Consumption (approx.) |
AC: 1.4 VA (50 Hz), 1.2 VA (60 Hz) DC: 0.9 W |
| Operating Frequency | Electrical: 1,800 operations/h maximum Mechanical: 18,000 operations/h maximum |
| Mechanical Life | 50,000,000 |
| Electrical Life | 500,000 (220VAC, 5A) |
| Operating Temperature | -25-45°C |
| Operating Humidity | 45-85%RH |
| Weight (approx.) | 35g |
