LK-T
–2–
ASCTB201E 201605-T
2. Specifications
Notes: *1. This 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.
*2. Wave is standard shock voltage of ±1.2×50μs according to JEC-212-1981
*3. The upper limit of the ambient temperature is the maximum temperature that can satisfy the coil temperature rise value. Refer to Usage, transport and storage
conditions in NOTES.
REFERENCE DATA
Characteristics Item Specifications
Contact
Arrangement 1 Form A
Contact resistance (Initial) Max. 100 mΩ (By voltage drop 6 V DC 1A)
Contact material AgSnO2 type
Rating
Nominal switching capacity (resistive load) 5A 277V AC
Max. switching power (resistive load) 1,385VA
Max. switching voltage 277V AC
Max. switching current 8A (AC)
Min. switching capacity (reference value)*
1
100mA, 5V DC
Electrical
characteristics
Insulation resistance (Initial) Min. 1,000MΩ (at 500V DC) Measurement at same location as “Breakdown voltage” section.
Breakdown voltage
(Initial)
Between open contacts 1,000 Vrms for 1 min. (Detection current: 10 mA)
Between contact and coil 4,000 Vrms for 1 min. (Detection current: 10 mA)
Surge breakdown voltage*
2
(Between contact and coil) (Initial)
10,000 V
Operate time (at nominal voltage) (at 20°C 68°F)
(Initial)
Max. 15 ms (excluding contact bounce time.)
Release time (at nominal voltage) (at 20°C 68°F)
(Initial)
Max. 5 ms (excluding contact bounce time) (Without diode)
Mechanical
characteristics
Shock resistance
Functional 200 m/s
2
(Half-wave pulse of sine wave: 11 ms; detection time: 10μs.)
Destructive 1,000 m/s
2
(Half-wave pulse of sine wave: 6 ms.)
Vibration resistance
Functional 10 to 55 Hz at double amplitude of 1.5 mm (Detection time: 10μs.)
Destructive 10 to 55 Hz at double amplitude of 1.5 mm
Expected life
Mechanical (at 180 times/min.) Min. 10
6
Electrical (at 20 times/min.) Min. 10
5
(ON: 1.5s, OFF: 1.5s, at nominal switching capacity)
Conditions
Conditions for operation, transport and storage*
3
Ambient temperature: –40°C to +70°C –40°F to +158°F,
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature),
Air pressure: 86 to 106kPa
Max. operating speed 20 times/min. (at nominal switching capacity)
Unit weight Approx. 12 g .42 oz
1. Max. switching power (AC resistive load) 2. Coil temperature rise
Sample: LKT1aF-12V, 6 pcs.
Point measured: coil inside
Contact current: 0 A, 8A
3. Ambient temperature characteristics and coil
applied voltage
100
10
1
5
0 10 100
Contact voltage, V
Contact current, A
800
0
5
10
15
20
25
30
100 120
20°C 8A
20°C 0A
70°C 8A
70°C 0A
Temperature rise, °C
Coil applied voltage, %V
Allowable ambient temperatures
against % coil voltages
(max. inside the coil temperature
set as 115°C 239°F)
120
300
200
100
0
100806040200
Ambient temperature, °C
Coil applied voltage, %V
Carrying current: 8A
Pick-up voltage (hot start)
Pick-up voltage (cold start)
4-(1). Electrical life test
(5 A 277 V AC, resistive load)
Sample: LKT1aF-12V, 6 pcs.
Operation frequency: 20 times/min.
(ON/OFF = 1.5s: 1.5s)
Ambient temperature: 20°C 68°F
Circuit:
Change of pick-up and drop-out voltage Change of contact resistance
12V DC
Contact
welding
detection
and Mis-
contacting
detection
circuit
277V AC
0
0
2
4
6
8
10
12
510
Drop-out voltage
Pick-up voltage
Max.
Min.
x
Max.
Min.
x
No. of operations, ×10
4
Pick-up and drop-out voltage, V
0
0
5
10
15
20
25
30
35
40
45
50
105
Max.
Min.
x
No. of operations, ×10
4
Contact resistance, mΩ
