Panasonic Switch LK T Relays User Manual

SLIM POWER RELAY  
WITH HIGH INRUSH  
CURRENT CAPABILITY  
TV-8 CERTIFIED  
LK-T RELAYS  
FEATURES  
11.0  
.433  
24.0  
.945  
1. High inrush current capability  
1) Operating load capability:  
3. High noise immunity realized by the  
card separation structure between  
contact and coil  
25.0  
.984  
inrush 118 A, steady 8 A  
2) UL/C-UL TV-8 approved  
4. Conforms to the various safety  
standards  
UL, C-UL, TÜV, and SEMKO approved  
2. High insulation resistance  
1) Creepage distance and clearances  
between contact and coil: Min. 6 mm .236  
inch (In compliance with IEC65)  
2) Surge withstand voltage between  
contact and coil: 10,000 V or more  
SPECIFICATIONS  
Contact  
Characteristics  
Arrangement  
1 Form A  
Max. operating speed  
20 cpm (at rated load)  
Initial contact resistance  
(By voltage drop 6 V DC 1 A)  
Initial insulation resistance*1  
Min. 1,000 MΩ (at 500 V DC)  
Max. 100 mΩ  
AgSnO2 type  
5 A 277 V AC  
Between open  
contacts  
Initial *2  
breakdown  
1,000 Vrms for 1 min.  
Contact material  
Nominal switching  
capacity  
Between contact  
voltage  
4,000 Vrms for 1 min.  
10,000 V  
and coil  
Max. switching power  
Max. switching voltage  
Max. switching current  
1,385 V A  
277 V AC  
Initial surge voltage between contact  
and coil*3  
Operate time*4  
(at nominal voltage)  
Release time (without diode)*4  
(at nominal voltage)  
Rating  
(resistive load)  
8 A (120V AC)  
Max. 15ms (at 20°C 68°F)  
Max. 5ms (at 20°C 68°F)  
Min. switching capacity#1  
(Reference value)  
100 mA, 5 V DC  
Mechanical (at 180 cpm)  
106  
105  
Expected life  
(min. operations)  
Max. 35°C with nominal coil  
voltage and at 5 A contact  
carrying current  
Electrical (at 20 cpm)  
(at rated load)  
Temperature rise (at 70°C)  
(resistance method)  
200 m/s2{approx. 20 G}  
1,000 m/s2{approx. 100 G}  
Coil  
Functional*5  
Shock  
Nominal operating power  
250 mW  
Destructive*6  
resistance  
#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.  
10 to 55Hz  
at double amplitude of 1.5mm  
Functional*7  
Vibration  
Remarks  
resistance  
10 to 55Hz  
at double amplitude of 1.5mm  
Destructive  
*1 Measurement at same location as “Initial breakdown voltage” section.  
*2 Detection current: 10mA  
Ambient  
temp.  
–40°C to +70°C  
–40°F to +158°F  
*3 Wave is standard shock voltage of ±1.2 × 50μs according to JEC-212-1981  
*4 Excluding contact bounce time.  
Conditions for operation,  
transport and storage*8  
(Not freezing and  
condensing at low  
temperature)  
*5 Half-wave pulse of sine wave: 11 ms; detection time: 10 μs  
*6 Half-wave pulse of sine wave: 6 ms  
Humidity  
5 to 85% R.H.  
*7 Detection time: 10 μs  
Air  
pressure  
86 to 106 kPa  
*8 The upper operation ambient temperature limit is the maximum temperature that  
can satisfy the coil temperature rise value. Refer to 1. Usage, transport and  
storage conditions in NOTES on page 3.  
Unit weight  
Approx. 12 g .42 oz  
TYPICAL  
ORDERING INFORMATION  
APPLICATIONS  
Ex. LKT 1a  
F
12V  
• Audio visual equipment  
• Flat TVs and audio equipment, etc.  
• Office equipment  
Contact arrangement  
1a: 1 Form A  
Protective construction  
F: Flux-resistant type  
Coil voltage(DC)  
5, 9, 12, 24V  
• Home appliances  
UL/C-UL, TÜV, SEMKO, TV-8 approved type is standard.  
Notes: 1. Standard packing Carton: 100 pcs. Case: 500 pcs.  
2. 3 V, 6 V, and 18 V DC types are also available. Please consult us for details.  
ds_61113_0004_en_lkt: 091008J  
1
 
LK-T  
4-(2). Electrical life test  
(UL508 TV-8 rating test)  
Change of pick-up and drop-out voltage  
Change of contact resistance  
Sample: LKT1aF-12V, 6 pcs.  
• Overload test  
Load: 12 A 120 V AC (60 Hz),  
Inductive load (cosφ = 0.75)  
Operation frequency: 6 times/min  
(ON : OFF = 1 s : 9 s)  
No. of operations: 50 ope.  
• Endurance test  
Load: 8A 120 V AC (960 W lamp load),  
(Inrush: 118 A)  
12  
50  
45  
40  
35  
30  
25  
20  
15  
10  
5
10  
Pick-up voltage  
8
Max.  
x
Min.  
6
4
Operation frequency: 1 times/min  
(ON: OFF = 1 s: 59 s)  
No. of operations: 25,000 ope.  
Max.  
x
Min.  
Drop-out voltage  
2
Max.  
x
Min.  
0
0
0
25  
0
25  
No. of operations, ×103  
No. of operations, ×103  
NOTES  
1. Usage, transport and storage  
conditions  
2. Solder and cleaning conditions  
4) The cycle lifetime is defined under the  
standard test condition specified in the  
JIS* C 5442 standard (temperature 15 to  
35°C 59 to 95°F, humidity 25 to 75%).  
Check this with the real device as it is  
affected by coil driving circuit, load type,  
activation frequency, activation  
phase,ambient conditions and other  
factors.  
Also, be especially careful of loads such  
as those listed below.  
(1) When used for AC load-operating and  
the operating phase is synchronous.  
Rocking and fusing can easily occur due  
to contact shifting.  
(2) High-frequency load-operating  
When high-frequency opening and  
closing of the relay is performed with a  
load that causes arcs at the contacts,  
nitrogen and oxygen in the air is fused by  
the arc energy and HNO3 is formed. This  
can corrode metal materials.  
Three countermeasures for these are  
listed here.  
• Incorporate an arc-extinguishing circuit.  
• Lower the operating frequency  
• Lower the ambient humidity  
5) Heat, smoke, and even a fire may  
occur if the relay is used in conditions  
outside of the allowable ranges for the  
coil ratings, contact ratings, operating  
cycle lifetime, and other specifications.  
Therefore, do not use the relay if these  
ratings are exceeded.  
6) If the relay has been dropped, the  
appearance and characteristics should  
always be checked before use.  
7) Incorrect wiring may cause  
1) Please obey the following conditions  
when soldering automatically.  
(1) Preheating: Within 120°C 248°F  
(solder surface terminal portion) and  
within 120 seconds  
(2) Soldering iron: 260°C±5°C  
500°F±41°F (solder temperature) and  
within 6 seconds (soldering time)  
2) Since this is not a sealed type relay, do  
not clean it as is. Also, be careful not to  
allow flux to overflow above the PC board  
or enter the inside of the relay.  
3. Certification  
1) This relay is UL and C-UL certified  
(File No. E43149).  
UL, C-UL rating: TV-8  
2) This relay is certified by TUV as an  
electromagnetic relay that complies with  
VDE0435 (File No. B040413461035).  
(1) TUV rating: 8A, 250 V to COSφ = 1.0  
(2) The terminals of this relay can only be  
connected with solder.  
1) Temperature:  
–40 to +70°C –40 to +158°F  
2) Humidity: 5 to 85% RH  
(Avoid freezing and condensation.)  
The humidity range varies with the  
temperature. Use within the range  
indicated in the graph below.  
3) Atmospheric pressure: 86 to 106 kPa  
Temperature and humidity range for  
usage, transport, and storage  
Humidity, %RH  
85  
Tolerance range  
(Avoid freezing  
when used at  
(Avoid  
condensation  
temperatures lower when used at  
than 0°C 32°F)  
temperatures higher  
than 0°C 32°F)  
5
-40  
-40  
0
+32  
70  
+158  
Temperature, °C °F  
(3) This relay is certified by SEMKO (File  
No. 400968).  
SEMKO rating: 3/100A 250 V AC, 5/40A  
250 V AC  
4) Condensation  
Condensation forms when there is a  
sudden change in temperature under  
high temperature and high humidity  
conditions. Condensation will cause  
deterioration of the relay insulation.  
5) Freezing  
4. Others  
1) For precautions regarding use and  
explanations of technical terminology,  
please refer to “Relay Technical  
Information”.  
2) To ensure good operation, please keep  
the voltage on the coil ends to ±5% (at  
20°C 68°F) of the rated coil operation  
voltage. Also, please be aware that the  
pick-up voltage and drop-out voltage may  
change depending on the temperature  
and conditions of use.  
Condensation or other moisture may  
freeze on the relay when the  
temperatures is lower than 0°C 32°F.  
This causes problems such as sticking of  
movable parts or operational time lags.  
6) Low temperature, low humidity  
environments  
The plastic becomes brittle if the relay is  
exposed to a low temperature, low  
humidity environment for long periods of  
time.  
unexpected events or the generation of  
heat or flames.  
3) Keep the ripple rate of the nominal coil  
voltage below 5%.  
For Cautions for Use, see Relay Technical Information.  
ds_61113_0004_en_lkt: 091008J  
3
 
 

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