Panasonic LK-T User Manual

SLIM POWER RELAY

WITH HIGH INRUSH

CURRENT CAPABILITY

TV-8 CERTIFIED

LK-T

LK-T RELAYS

24.0

.945

11.0

.433

25.0

.984

FEATURES

1. High inrush current capability

1) Operating load capability:
inrush 118 A, steady 8 A

2) UL/C-UL TV-8 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

Arrangement 1 Form A
Initial contact resistance

(By voltage drop 6 V DC 1 A)
Contact material AgSnO2 type

Nominal switching
capacity

Rating
(resistive load)

Expected life
(min. operations)

Max. switching power 1,385 V A
Max. switching voltage 277 V AC
Max. switching current 8 A (120V AC)
Min. switching capacity

(Reference value)
Mechanical (at 180 cpm) 10
Electrical (at 20 cpm)

(at rated load)

#1

Coil

Nominal operating power 250 mW

#1 This value can change due to the switching frequency , environment al conditions,

and desired reliability level, therefore it is recommended to check this with the
actual load.

Remarks

*1Measurement at same location as “Initial breakdown voltage” section.

2

Detection current: 10mA

*

3

Wave is standard shock voltage of ±1.2 × 50μs according to JEC-212-1981

*

4

Excluding contact bounce time.

*

5

Half-wave pulse of sine wave: 11 ms; detection time: 10 μs

*

6

Half-wave pulse of sine wave: 6 ms

*

7

Detection time: 10 μs

*

8

The upper operation ambient temperature limit is the ma ximum t emperature t hat

*

can satisfy the coil temperature rise value. Refer to 1. Usage, transport and
storage conditions in NOTES on page 3.

Max. 100 mΩ

5 A 277 V AC

100 mA, 5 V DC

6

5

10

3. High noise immunity realized by the
card separation structure between
contact and coil

4. Conforms to the various safety
standards

UL, C-UL, TÜV, and SEMKO approved

Characteristics

Max. operating speed 20 cpm (at rated load)
Initial insulation resistance*

Initial *2
breakdown
voltage

Initial surge voltage between contact
and coil*

Operate time*
(at nominal voltage)

Release time (without diode)*
(at nominal voltage)

Temperature rise (at 70°C)

Shock
resistance

Vibration
resistance

Conditions for operation,
transport and storage*
(Not freezing and
condensing at low
temperature)

Unit weight Approx. 12 g .42 oz

Between open
contacts

Between contact
and coil

3

4

Functional*
Destructive*

Functional*

Destructive

1

4

5

6

7

Ambient
temp.

8

Humidity 5 to 85% R.H.
Air

pressure

Min. 1,000 MΩ (at 500 V DC)

1,000 Vrms for 1 min.

4,000 Vrms for 1 min.

10,000 V

Max. 15ms (at 20°C 68°F)

Max. 5ms (at 20°C 68°F)

Max. 35°C with nominal coil

voltage and at 5 A contact

carrying current

(resistance method)

200 m/s2{approx. 20 G}

1,000 m/s2{approx. 100 G}

10 to 55Hz

at double amplitude of 1.5mm

10 to 55Hz

at double amplitude of 1.5mm

–40°C to +70°C

–40°F to +158°F

86 to 106 kPa

TYPICAL
APPLICATIONS

• Audio visual equipment

• Flat TVs and audio equipment, etc.

• Office equipment

• Home appliances

ds_61113_0004_en_lkt: 091008J

ORDERING INFORMATION

Ex. LKT 1a F 12V

Contact arrangement Protective construction Coil voltage(DC)

1a: 1 Form A F: Flux-resistant type 5, 9, 12, 24V

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.

1

LK-T

2-0.9 dia. 2-1.3 dia.

2

a.

A

TYPES AND COIL DATA (at 20°C 68°F)

Drop-out

voltage,

V DC (min.)

(Initial)

Coil resistance,

Ω (±10%)

Part No.

Nominal voltage,

V DC

Pick-up voltage,

V DC (max.)

(Initial)

LKT1aF-5V 5 (Initial) 3.5 (Initial) 0.5 100 50 250 6.5
LKT1aF-9V 9 (Initial) 6.3 (Initial) 0.9 324 27.8 250 11.7
LKT1aF-12V 12 (Initial) 8.4 (Initial) 1.2 576 20.8 250 15.6
LKT1aF-24V 24 (Initial) 16.8 (Initial) 2.4 2,304 10.4 250 31.2

DIMENSIONS

Max. 25.0

.984

0.5

.020

4

0.4

.016

1.0

.039

7.5

.295

.157

Max. 11.0

.433

Dimension: General tolerance
Max. 1mm .039 inch: ±0.1 ±.004
1 to 3mm .039 to .118 inch: ±0.2 ±.008
Min. 3mm .118 inch: ±0.3 ±.012

0.5 dia.

.020 dia.

1.65

.065

0.3

.012

Max. 24.0

.945

16.5

.650

20.0

.787

Nominal

operating

current, mA

(±10%)

Nominal

operating power,

mW

PC board pattern (Bottom view)

-.035 dia. 2-.051 di

16.5

.650

20.0

.787

Tolerance: ±0.1 ±.004

Schematic (Bottom view)

Maximum

allowable

voltage, V DC

(at 20°C 68°F)

mm inch

7.5

.295

REFERENCE DATA

1. Max. switching power (AC resistive load) 2. Coil temperature rise

100

10

5

Contact current, A

1

0 10 100

Contact voltage, V

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:

Contact
welding
detection

277V AC

12V DC

and Mis­contacting
detection
circuit

2

Sample: LKT1aF-12V, 6 pcs.
Point measured: coil inside
Contact current: 0 A, 5A

30

25

20

15

Temperature rise, °C

10

5

0

Change of pick-up and drop-out voltage Change of contact resistance

12

10

8

6

4

Pick-up and drop-out voltage, V

2

0

0

800

100 120

Coil applied voltage, %V

Pick-up voltage

Drop-out voltage

510

No. of operations, ×10

4

20°C 5A
20°C 0A

70°C 5A
70°C 0A

Max.
x

Min.

Max.
x
Min.

3. Ambient temperature characteristics and coil
applied voltage

500

400

300

200

Coil applied voltage, %V

100

50

45

40

35

30

25

20

Contact resistance, mΩ

15

10

5

0

Allowable ambient temperatures
against % coil voltages
(max. inside the coil temperature
set as 115°C

0

0 1020304050607080

0

239°F)

Carrying current: 5

Coil & contact no carrying current

Pick-up voltage

Ambient temperature, °C

105

No. of operations, ×10

4

Max.

x

Min.

ds_61113_0004_en_lkt: 091008J