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ST 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)
3 V DC Max. 80% V of rated coil voltage (Initial) Min. 10% V of rated coil voltage (Initial) 78.9 mA 38 Ω Approx.
240 mW
150% V of rated coil voltage
5 V DC 47.6 mA 105 Ω
6 V DC 40 mA 150 Ω
9 V DC 25 mA 360 Ω
12 V DC 20 mA 600 Ω
24 V DC 10 mA 2,400 Ω
48 V DC 5.3 mA 9,000 Ω
*square, pulse drive

2.2 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)
Set coil Reset coil Set coil Reset coil Set coil Reset coil
3 V DC Max. 80% V
of rated coil
voltage
(Initial)
Max. 80% V
of rated coil
voltage
(Initial)
75 mA 75 mA 40 Ω 40 Ω Approx.
240 mW
Approx.
240 mW
150% V of nominal voltage
5 V DC 45 mA 45 mA 110 Ω 110 Ω
6 V DC 37.5 mA 37.5 mA 155 Ω 155 Ω
9 V DC 25 mA 25 mA 360 Ω 360 Ω
12 V DC 18.8 mA 18.8 mA 640 Ω 640 Ω
24 V DC 10 mA 10 mA 2,400 Ω 2,400 Ω
48 V DC 4.7 mA 4.7 mA 10,200 Ω 10,200 Ω
*square, pulse drive

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Specifications

Item Specifications
Contact data Contact arrangement 1 Form A 1 Form B, 2 Form A
Contact resistance (initial) Max. 30 mΩ (by voltage drop 6 V DC 1 A)
Contact material Au-flashed AgSnO2 type
Contact rating (resistive) 8 A 250 V AC, 5 A 30 V DC
Max. switching power (resistive) 2,000 VA, 150 W
Max. switching voltage 250 V AC, 30 V DC
Max. switching current 8 A (AC), 5 A (DC)
Min. switching load (reference value)*1 100 mA 5 V DC
Insulation resistance (initial) Min. 1,000 MΩ (at 500 V DC, Measured portion is the same as the case of dielectric strength.)
Dielectric strength (initial) Between
open contacts
1,200 Vrms for 1 min (detection current: 10 mA)
Between
contact sets
2,000 Vrms for 1 min (detection current: 10 mA)
Between
contact and coil
3,750 Vrms for 1 min (detection current: 10 mA)
Surge withstand voltage (initial)*2 Between
contact and coil
6,000 V
Time characteristics (initial) Operate (Set) time Max. 15 ms (Max. 15 ms) at rated coil voltage (at 20°C, without bounce)
Release (Reset) time Max. 10 ms (Max. 15 ms) at rated coil voltage (at 20°C, without bounce, without diode)
Shock resistance Functional 196 m/s2 (half-sine shock pulse: 11 ms, detection time:10 μs)
Destructive 980 m/s2 (half-sine shock pulse: 6 ms)
Vibration resistance Functional 10 to 55 Hz (at double amplitude of 2 mm, detection time: 10 μs)
Destructive 10 to 55 Hz (at double amplitude of 3 mm)
Expected life Mechanical life Min. 10 x 106 ope. (switching frequency: at 180 times/min)
Conditions Conditions for usage,
transport and storage *2
Ambient temperature: -40 to +60°C,
Humidity: 5 to 85% RH (Avoid icing and condensation)
Unit weight Approx. 10 g
*1This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the actual load.
*2Wave is standard shock voltage of ±1.2 x 50 μs according to JEC-212-1981
*3For ambient temperature, please read "GUIDELINES FOR RELAY USAGE".

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Expected electrical life

Conditions: Resistive load, switching frequency ON : OFF = 1 s : 5 s

Type Switching capacity Number of operations
1 Form A 1 Form B, 2 Form A 8 A 250 V AC Min. 100 x 103 ope.

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