Panasonic LK-T Relays Usage, transport and storage conditions, Solder and cleaning conditions

LK-T

4-(2). Electrical life test (UL508 TV-8 rating test)

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)

Operation frequency: 1 times/min

(ON: OFF = 1 s: 59 s)

No. of operations: 25,000 ope.

Change of pick-up and drop-out voltage

V	12
voltage,	10
		Pick	-up voltage		Max.
-out	8
					x
drop					Min.
	6
up and
	4
-
Pick		Drop	-out voltage		Max.
	2
					x
					Min.
	00
				25
		No. of operations, ⋅103

Change of contact resistance

	50
mΩ	45
	40
resistance,	35
	30
Contact	25
	20
	15			Max.
	10
				x
	5			Min.
	00
		25
			No. of operations, ⋅103

NOTES

1.Usage, transport and storage conditions

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		(Avoid
when used at		condensation
temperatures lower		when used at
than 0°C 32°F)		temperatures higher
	5	than 0°C 32°F)
-40	0		70
-40	+32		+158

Temperature, °C °F

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

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.

2.Solder and cleaning conditions

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.

(3) This relay is certified by SEMKO (File No. 400968).

SEMKO rating: 3/100A 250 V AC, 5/40A 250 V AC

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.

3)Keep the ripple rate of the nominal coil voltage below 5%.

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 unexpected events or the generation of heat or flames.

For Cautions for Use, see Relay Technical Information.

ds_61113_0004_en_lkt: 091008J 3