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Discontinued
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LF-G 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.
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)
9 V DC Max. 70% V of
rated coil voltage
(Initial)
Min. 10% V of
rated coil voltage
(Initial)
155 mA 58 Ω 1,400 mW 120% V of
rated coil
voltage
12 V DC 117 mA 103 Ω
18 V DC 78 mA 230 Ω
24 V DC 59 mA 410 Ω
*square, pulse drive

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Specifications

Item Specifications
Standard type High capacity type
Contact GAP 1.5 mm, 1.8 mm Contact GAP 1.5 mm Contact GAP 1.8 mm
Contact data Contact arrangement 1 Form A
Contact resistance
(initial)
Max. 100 mΩ (by voltage drop 6 V DC 1 A)
Contact material AgSnO2 type
Contact rating
(resistive)
22 A 250 V AC 31 A 250 V AC 33 A 250 V AC
Max. switching power
(resistive)
5,500 VA 7,750 VA 8,250 VA
Max. switching voltage 250 V AC
Max. switching current 22 A (AC) 31 A (AC) 33 A (AC)
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
2,500 Vrms for 1 min (detection current: 10 mA)
Between
contact and coil
4,000 Vrms for 1 min (detection current: 10 mA)
Surge withstand
voltage (initial)*2
Between
contact and coil
6,000 V
Coil holding voltage *3 35 to 120% V (at 20°C, contact carrying current 22 A)
45 to 80% V (at 85°C, contact carrying current 22 A)
35 to 120% V (at 20°C, contact carrying current 31 A)
45 to 80% V (at 85°C, contact carrying current 31 A)
35 to 120% V (at 20°C, contact carrying current 33 A)
45 to 80% V (at 85°C, contact carrying current 33 A)
Time
characteristics
(initial)
Operate time Max. 20 ms at rated coil voltage (at 20°C, without bounce)
Release time Max. 10 ms at rated coil voltage (at 20°C, without bounce, without diode)
Shock resistance Functional 100m/s2 (half-sine shock pulse: 11 ms, detection time: 10 µs)
Destructive 1,000m/s2 (half-sine shock pulse: 6 ms)
Vibration
resistance
Functional 10 to 55 Hz (at double amplitude of 1.5 mm, detection time: 10 µs)
Destructive 10 to 55 Hz (at double amplitude of 1.5 mm)
Expected life Mechanical life Contact GAP 1.5 mm: Min. 106 ope. (switching frequency: at 180 times /min)
Contact GAP 1.8 mm: Min. 500 x 103 ope. (switching frequency: at 180 times/min)
Conditions Conditions for usage,
transport and storage *4
Ambient temperature:
-40 to +60°C (When rated coil voltage applied)
-40 to +85°C (Coil holding voltage is when 45 to 80% V of rated coil voltage is applied.)
Humidity: 5 to 85% RH (Avoid icing and condensation)
Unit weight Approx. 23 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
*3Coil holding voltage is the coil voltage after 100 ms from the applied rated coil voltage.
*4For ambient temperature, please read "GUIDELINES FOR RELAY USAGE".

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Expected electrical life

Type Contact GAP Load Switching capacity Number of operations
Standard
type
1.5 mm
1.8 mm
Resistive load 22 A 250 V AC Min. 30 x 103 ope.
(switching frequency at 20 times/min)
Destructive 22 A 250 V AC (cosφ = 0.8) Min. 30 x 103 ope.
(switching frequency ON : OFF = 0.1 s : 10 s)
Over load 35 A 250 V AC (cosφ = 0.8) Min. 50 ope.
(switching frequency ON : OFF = 0.1 s : 10 s)
High capacity
type
1.5 mm Destructive 31 A 250 V AC (cosφ = 0.8) Min. 30 x 103 ope.
(switching frequency ON : OFF = 0.1 s : 10 s)
Over load 47 A 250 V AC (cosφ = 0.8) Min. 50 ope.
(switching frequency ON : OFF = 0.1 s : 10 s)
1.8 mm Destructive 33 A 250 V AC (cosφ = 0.8) Min. 30 x 103 ope.
(switching frequency ON : OFF = 0.1 s : 10 s)
Over load 50 A 250 V AC (cosφ = 0.8) Min. 50 ope.
(switching frequency ON : OFF = 0.1 s : 10 s)

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