Panasonic LK-T Relays, LKT1aF-5V, LKT1aF-9V, LKT1aF-12V, LKT1aF-24V Specification Sheet

LK-T

1

ds_61113_0004_en_lkt: 091008J

SPECIFICATIONS

SLIM POWER RELAY

WITH HIGH INRUSH

CURRENT CAPABILITY

TV-8 CERTIFIED

LK-T RELAYS

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

3. High noise immunity realized by the
card separation st ru cture between
contact and coil

4. Conforms to the various safety
standards

UL, C-UL, TÜV, and SEMKO approved

25.0

24.0

11.0

.984

.945

.433

Contact

Coil

#1 This value can change due to the switching frequency , environmental condi tions,

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

Characteristics

Arrangement 1 Form A
Initial contact resistance

(By voltage drop 6 V DC 1 A)

Max. 100 mΩ

Contact material AgSnO2 type

Rating
(resistive load)

Nominal switching
capacity

5 A 277 V AC

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

#1

(Reference value)

100 mA, 5 V DC

Expected life
(min. operations)

Mechanical (at 180 cpm) 10

6

Electrical (at 20 cpm)
(at rated load)

10

5

Nominal operating power 250 mW

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

1

Min. 1,000 MΩ (at 500 V DC)

Initial *2
breakdown
voltage

Between open
contacts

1,000 Vrms for 1 min.

Between contact
and coil

4,000 Vrms for 1 min.

Initial surge voltage between contact
and coil*

3

10,000 V

Operate time*

4

(at nominal voltage)

Max. 15ms (at 20°C 68°F)

Release time (without diode)*

4

(at nominal voltage)

Max. 5ms (at 20°C 68°F)

Temperature rise (at 70°C)

Max. 35°C with nominal coil

voltage and at 5 A contact

carrying current

(resistance method)

Shock
resistance

Functional*

5

200 m/s2{approx. 20 G}

Destructive*

6

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

Vibration
resistance

Functional*

7

10 to 55Hz

at double amplitude of 1.5mm

Destructive

10 to 55Hz

at double amplitude of 1.5mm

Conditions for operation,
transport and storage*

8

(Not freezing and
condensing at low
temperature)

Ambient
temp.

–40°C to +70°C

–40°F to +158°F

Humidity 5 to 85% R.H.
Air

pressure

86 to 106 kPa

Unit weight Approx. 12 g .42 oz

TYPICAL
APPLICATIONS

• Audio visual equipment

• Flat TVs and audio equipment, etc.

• Office equipment

• Home appliances

ORDERING INFORMATION

Contact arrangement Protective construction Coil voltage(DC)

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

Ex. LKT 1a F 12V

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.

LK-T

2

ds_61113_0004_en_lkt: 091008J

TYPES AND COIL DATA (at 20°C 68°F)

DIMENSIONS

mm inch

REFERENCE DATA

Part No.

Nominal voltage,

V DC

Pick-up voltage,

V DC (max.)

(Initial)

Drop-out

voltage,

V DC (min.)

(Initial)

Coil resistance,

Ω (±10%)

Nominal

operating

current, mA

(±10%)

Nominal

operating power,

mW

Maximum

allowable

voltage, V DC

(at 20°C 68°F)
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

4

0.5

1.65

Max. 25.0

Max. 11.0

0.3

0.5 dia.

20.0

16.5

0.4

Max. 24.0

7.5

1.0

.157

.020

.065

.984

.433

.012

.020 dia.

.787

.650

.016

.945

.295

.039

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

PC board pattern (Bottom view)

Tolerance: ±0.1 ±.004

Schematic (Bottom view)

2-0.9 dia. 2-1.3 dia.

16.5

7.5

20.0

2

-.035 dia. 2-.051 di

a.

.650

.295

.787

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

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

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 5A
20°C 0A

70°C 5A
70°C 0A

Temperature rise, °C

Coil applied voltage, %V

0

500

400

300

200

100

0 1020304050607080

Ambient temperature, °C

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

Pick-up voltage

Coil & contact no carrying current

Coil applied voltage, %V

Carrying current: 5

A

239°F)

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 Mis­contacting
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