LA
275
LA RELAYS
2 Form A slim power relay
mm
inch
25.0
.984
24.0
.945
12.0
.472
FEATURES
1. 2 Form A slim type
24(L)
12(W)
25(H) mm
.945(L)
.472(W)
.984(H) inch
2. 3A type and 5A TV type
3A type: Contact reliability and break per-
formance best suited for protecting and
switching speakers.
5A TV type: Tough against inrush current
and optimal for turning on and off the pow-
er supply. Rated TV-4 (UL/CSA).
3. High insulation resistance
Creepage distance and clearances be-
tween contact and coil: Min. 6 mm
.236
inch
(In compliance with IEC65)
Surge withstand voltage between con-
tact and coil: 10,000 V or more.
4. High noise immunity realized by the
card separation structure between
contact and coil
5. Conforms to the various safety stan-
dards
UL/CSA, VDE, TV, SEMKO, SEV ap-
proved
SPECIFICATIONS
Contact
Coil
Remarks
* Specifications will vary with foreign standards certification ratings.
*
1
Measurement at same location as "Initial breakdown voltage" section.
*
2
Detection current: 10mA
*
3
Wave is standard shock voltage of
1.2
50ms according to JEC-212-1981
*
4
Excluding contact bounce time.
*
5
Half-wave pulse of sine wave: 11 ms; detection time: 10
s
*
6
Half-wave pulse of sine wave: 6 ms
*
7
Detection time: 10
s
*
8
Refer to 5. Conditions for operation, transport and storage mentioned in
AMBIENT ENVIRONMENT (Page 61).
Characteristics
Type
3A rated
5A TV rated
Arrangement
2 Form A
Initial contact resistance, max.
(By voltage drop 6 V DC 1 A)
Max. 50 m
Max. 100 m
Contact material
Gold-clad
silver alloy
Silver alloy
Rating
(resistive
load)
Nominal switching
capacity
3 A 125 V AC
5 A 277 V AC
Max. switching power
625 VA
1,385 V A
Max. switching voltage
125 V AC
277 V AC
Max. switching current
5 A (AC)
Expected
life (min.
operations)
Mechanical (at 180 cpm)
10
6
Electrical (at 20 cpm)
(at rated load)
5
10
4
(ON: OFF=1.5s: 1.5s)
Nominal operating power
530 mW
Type
3A rated
5A TV rated
Max. operating speed
20 cpm
Initial insulation resistance*
1
Min. 1,000 M
(at 500 V DC)
Initial *
2
breakdown
voltage
Between contact sets
1,000 Vrms for 1 min.
Between open contacts
1,000 Vrms for 1 min.
Between contact and
coil
4,000 Vrms for 1 min.
Surge voltage between contact and
coil*
3
Min. 10,000 V
Operate time*
4
(at nominal voltage)
Max. 15ms (at 20
C
68
F
)
Release time (with diode)*
4
(at nominal voltage)
Max. 15ms (at 20
C
68
F
)
Temperature rise (at 70
C)
Max. 45
C
with nominal
coil voltage
and at 3 A
contact car-
rying current
Max. 45
C
with nominal
coil voltage
and at 5 A
contact car-
rying current
Shock resistance
Functional*
5
Min. 200 m/s
2
{approx. 20 G}
Destructive*
6
Min. 1,000 m/s
2
{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 con-
densing at low tempera-
ture)
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. 13 g
.46 oz
ORDERING INFORMATION
Contact arrangement Contact capacity Protective construction Coil voltage(V DC)
2: 2 Form A
Nil: 3A
P: 5A TV-4
F: Flux-resistant type
12, 24
2
Product name
LA
Ex.
LA
A
F
12
P
UL/CSA, VDE, TV, SEMKO, TV-4 approved type is standard.
Notes: 1. Standard packing Carton: 100 pcs. Case: 500 pcs.
2. 4.5V, 5V, 9V and 18V DC types are also available. Please consult us for details.
VDE
LA
276
TYPES AND COIL DATA (at 20
C
68
F
)
Part No.
Nominal
voltage,
V DC
Pick-up
voltage,
V DC (max.)
Drop-out
voltage,
V DC (min.)
Coil
resistance,
(
10%)
Nominal
operating
current,
mA (
10%)
Nominal
operating
power,
mW
Maximum
allowable
voltage,
V DC
3 A type
5A TV type
ALA2F12
ALA2PF12
12
(Initial) 9
(Initial) 0.6
272
44.2
530
15.6
ALA2F24
ALA2PF24
24
(Initial) 18
(Initial) 1.2
1,087
22.1
530
31.2
DIMENSIONS
mm
inch
0.3
.012
0.4
.016
4
.157
0.5
.020
1.65
.065
Max. 24
.945
Max. 25.0
.984
Max. 12
.472
0.5
.020
15.0
.591
5.0
.197
1.0
.039
1.0
.039
7.5
.295
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)
4-1.3 dia
4-.051 dia
2-0.9 dia
2-.035 dia
15.0
.591
7.5
.295
5.0
.197
REFERENCE DATA
1. Max. switching power (AC resistive load)
2-(1). Life curve (250 V AC resistive load)
2-(2). Life curve (125 V AC resistive load)
10
3
5
0
300
100
Contact voltage, V
Contact current, A
ALA2PF12
ALA2F12
100
10
1
1
0
2
3
4
5
250V AC resistive load
Contact current, A
Life,
10
4
100
10
1
1
0
2
3
125V AC resistive load
Contact current, A
Life,
10
4
3-(1). Coil temperature rise
Sample: ALA2F12, 6 pcs.
Measured portion: coil inside
Contact current: 0 A, 3A
3-(2). Coil temperature rise
Sample: ALA2PF12, 6 pcs.
Measured portion: coil inside
Contact current: 0 A, 5A
4. Ambient temperature characteristics and coil
applied voltage
Contact current: ALA2F=3A
ALA2PF=5A
80
0
0
5
10
15
20
25
30
35
40
45
50
100
120
Temperature rise,
C
Coil applied voltage, %V
20
C 3A
20
C 0A
70
C 3A
70
C 0A
80
0
0
5
10
15
20
25
30
35
40
45
50
100
120
Temperature rise,
C
Coil applied voltage, %V
70
C 5A
70
C 0A
20
C 5A
20
C 0A
0
200
100
50
150
0
20
40
60
80
Ambient temperature,
C
Allowable ambient temperatures
against % coil voltages
(max. inside the coil
temperature set as
115
C
239
F
)
Coil applied voltage, %V
LA
277
5-(1). Electrical life test
(3 A 125 V AC, resistive load)
Sample: ALA2F12, 6 pcs.
Operation frequency: 20 times/min.
(ON/OFF = 1.5s: 1.5s)
Ambient temperature: 20
C
68
F
Circuit:
G
NO
COM
NO
COM
125V AC
12V DC
Contact
welding
detection
and Mis-
contacting
detection
circuit
Change of pick-up and drop-out voltage
Change of contact resistance
0
0
20
40
60
80
100
2.5
5
Max.
Min.
x
Max.
Min.
x
No. of operations,
10
4
Pick-up and drop-out voltage, %V
Pick-up voltage
Drop-out voltage
0
0
10
20
30
40
50
5
2.5
Max.
Min.
x
No. of operations,
10
4
Contact resistance, m
5-(2). Electrical life test
(5 A 250 V AC, resistive load)
Sample: ALA2PF12, 6 pcs.
Operation frequency: 20 times/min.
(ON/OFF = 1.5s: 1.5s)
Ambient temperature: 20
C
68
F
Circuit:
G
NO
COM
NO
COM
250V AC
12V DC
Contact
welding
detection
and Mis-
contacting
detection
circuit
Change of pick-up and drop-out voltage
Change of contact resistance
0
0
20
40
60
80
100
2.5
5
Max.
Min.
x
Max.
Min.
x
No. of operations,
10
4
Pick-up and drop-out voltage, %V
Pick-up voltage
Drop-out voltage
0
0
10
20
30
40
50
5
2.5
Max.
Min.
x
No. of operations,
10
4
Contact resistance, m
5-(3). Electrical life test
(UL lamp load test TV-4)
Tested sample: ALA2PF12, 6 pcs.
Overload test
Load: 6.0 A 120 V AC (60 Hz),
Inrush: 91 A
Operation frequency: 10 times/min
(ON: OFF = 1 s: 5 s)
No. of operations: 50 ope.
Endurance test
Load: 4A 120 V AC (60 Hz),
Inrush: 65 A
Operation frequency: 10 times/min
(ON: OFF = 1 s: 5 s)
No. of operations: 25,000 ope.
Change of pick-up and drop-out voltage
Change of contact resistance
0
0
20
40
60
80
100
2.5
Max.
Min.
x
Max.
Min.
x
No. of operations,
10
4
Pick-up and drop-out voltage, %V
Pick-up voltage
Drop-out voltage
0
0
10
20
30
40
50
2.5
Max.
Min.
x
No. of operations,
10
4
Contact resistance, m
For Cautions for Use, see Relay Technical Information (Page 48 to 76).
9/1/2000
All Rights Reserved, Copyright Matsushita Electric Works, Ltd.
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