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RA Relays

Coil data

  • Operating characteristics such as ‘Operate voltage’ and ‘Release voltage’ are influenced by mounting conditions, ambient temperature, etc.
    Therefore, please use the relay within ±5% of rated coil voltage.
  • ‘Initial’ means the condition of products at the time of delivery.

1.Single side stable

Rated coil voltage Operate
voltage *
(at 20°C)
Release
voltage *
(at 20°C)
Rated operating
current
(±10%, at 20°C)
Coil resistance
(±10%, at 20°C)
Rated operating power Max. allowable
voltage
(at 20°C)
1.5 V DC Max. 75% V of
rated coil
voltage
(Initial)
Min. 10% V of
rated coil
voltage
(Initial)
93.8 mA 16 Ω 140 mW 150% V of
rated coil voltage
3 V DC 46.7 mA 64.3 Ω
4.5 V DC 31 mA 145 Ω
5 V DC 28.1 mA 178 Ω
6 V DC 23.3 mA 257 Ω
9 V DC 15.5 mA 579 Ω
12 V DC 11.7 mA 1,028 Ω
24 V DC 8.3 mA 2,880 Ω 200 mW
48 V DC 6.3 mA 7,680 Ω 300 mW 120% V of
rated coil voltage
*Square, pulse drive

2.1 coil latching

Rated coil
voltage
Set voltage*
(at 20°C)
Reset voltage*
(at 20°C)
Rated operating
current
(±10%, at 20°C)
Coil resistance
(±10%, at 20°C)
Rated operating
power
Max. allowable
voltage
(at 20°C)
1.5 V DC Max. 75% V of
rated coil
voltage
(Initial)
Max. 75% V of
rated coil
voltage
(Initial)
46.9 mA 32 Ω 70 mW 150% V of
rated coil
voltage
3 V DC 23.3 mA 128.6 Ω
4.5 V DC 15.6 mA 289.3 Ω
5 V DC 14 mA 357 Ω
6 V DC 11.7 mA 514 Ω
9 V DC 7.8 mA 1,157 Ω
12 V DC 5.8 mA 2,057 Ω
24 V DC 4.2 mA 5,760 Ω 100 mW
*Square, pulse drive

3.2 coil latching

Rated coil
voltage
Set voltage*
(at 20°C)
Reset voltage*
(at 20°C)
Rated operating
current
(±10%, at 20°C)
Coil resistance
(±10%, at 20°C)
Rated operating
power
Max. allowable
voltage
(at 20°C)
1.5 V DC Max. 75% V of
rated coil
voltage
(Initial)
Max. 75% V of
rated coil
voltage
(Initial)
93.8 mA 16 Ω 140 mW 150% V of
rated coil
voltage
3 V DC 46.7 mA 64.3 Ω
4.5 V DC 31 mA 145 Ω
5 V DC 28.1 mA 178 Ω
6 V DC 23.3 mA 257 Ω
9 V DC 15.5 mA 579 Ω
12 V DC 11.7 mA 1,028 Ω
24 V DC 8.3 mA 2,880 Ω 200 mW
*Square, pulse drive

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Specifications

Item Specifications
Contact data Contact arrangement 2 Form C
Contact resistance (initial) Max. 75 mΩ (by voltage drop 6 V DC 1 A)
Contact material Ag alloy / Au-clad Ag alloy
Contact rating (resistive) 10 mA 10 V DC, 1 A 30 V DC
Contact input power (CW) 3 W (1 GHz, 50 Ω, V.S.W.R. Max. 1.2)
Max. switching voltage 30 V DC
Max. switching current 1 A (DC)
Insulation resistance (initial) Min. 100 MΩ
(at 500 V DC, Measured portion is the same as the case of dielectric strength.)
Dielectric strength (initial) Between
open contacts
750 Vrms for 1 min (detection current: 10 mA)
Between
contact and coil
1,000 Vrms for 1 min (detection current: 10 mA)
Between
contact sets
1,000 Vrms for 1 min (detection current: 10 mA)
Between
contact and
earth terminal
1,000 Vrms for 1 min (detection current: 10 mA)
Time characteristics (initial) Operate (set) time Max. 4 ms at rated coil voltage (at 20 °C, without bounce) [Max. 4 ms (at 20 °C, without bounce)]
Release (reset) time Max. 4 ms at rated coil voltage (at 20°C, without bounce, without diode) [Max. 4 ms (at 20 °C, without bounce)]
Shock resistance Functional 500 m/s2(half-sine shock pulse: 11 ms, detection time: 10 μs)
Destructive 1,000 m/s2(half-sine shock pulse: 6 ms)
Vibration resistance Functional 10 to 55 Hz (at double amplitude of 3 mm, detection time: 10 μs)
Destructive 10 to 55 Hz (at double amplitude of 5 mm)
Expected life Mechanical life
(Cold switch)
Min. 100 x 106 (switching frequency: 180 times/min)
Conditions Conditions for usage,
transport and storage *
Ambient temperature: -40 to +85 °C (-40 to +70 °C at our standard packing condition)
Humidity: 5 to 85% RH (Avoid icing and condensation)
Unit weight Approx. 2 g
*For ambient temperature, please read“GUIDELINES FOR RELAY USAGE”..

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Expected electrical life (hot switch)

Conditions: Resistive load, switching frequency 20 times/min

Type Load Switching capacity Number of operations
2 Form C Resistive load 10 mA 10 V DC Min. 10 x 106
1 A 30 V DC Min. 100 x 103

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