Automation Controls Catalog
LF RELAYS(ALF)
Load for air conditioner
1 Form A 20A power relays
FEATURES
1. Ideal for compressor and inverter
loads
1) Compressor load: 20A 250V AC
2) Inverter load: 20A 100V AC,
10A 200V AC
15.7
30.1
2. Long insulation distance
23.3
• Creepage distance and clearances
between contact and coil;
Creepage Min. 9.5mm .374inch/
Clearance
Min. 8mm .315inch
PCB type
• Surge withstand voltage: 10,000V
3. “PCB” and “TMP” types available
4. Conforms to the various safety
standards:
（Unit：mm）
UL/C-UL, TÜV and VDE approved
Protective construction：Flux-resistant type
15.7
30.1
23.3
TMP type
TYPICAL APPLICATIONS
1. Air conditioner
2. Refrigerators
3. OA equipment
ORDERING INFORMATION
ALF 1
Contact arrangement
１ Form A
Terminal shape
T：TMP type
P：PCB type
Nominal coil voltage（DC）
05：5V, 06：6V, 09：9V
12：12V, 18：18V, 24：24V
Note：Certified by UL/C-UL,VDE and TÜV
TYPES
Contact arrangement
Nominal coil voltage
1 Form A
5V DC
6V DC
9V DC
12V DC
18V DC
24V DC
Part No.
TMP type
ALF1T05
ALF1T06
ALF1T09
ALF1T12
ALF1T18
ALF1T24
PCB type
ALF1P05
ALF1P06
ALF1P09
ALF1P12
ALF1P18
ALF1P24
Standard packing: Carton 50 pcs., Case 200 pcs.
2019.03
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© Panasonic Corporation 2019
ASCTB195E 201903
LF (ALF)
RATING
1.Coil data
• Operating characteristics such as ‘Operate voltage’ and ‘Release voltage’ are influenced by mounting conditions, ambient temperature, etc.
Therefore, please use the relay within ± 5% of rated coil voltage.
• ‘Initial’ means the condition of products at the time of delivery.
Nominal coil
voltage
Pick-up voltage
(at 20°C 68°F)
5V DC
6V DC
9V DC
12V DC
18V DC
24V DC
Drop-out voltage
(at 20°C 68°F)
70%V or less of
nominal voltage
(Initial)
10%V or more of
nominal voltage
(Initial)
Nominal operating
current
[±10%] (at 20°C 68°F)
180 mA
150 mA
100 mA
75 mA
50 mA
37.5mA
Coil resistance
[±10%] (at 20°C 68°F)
Nominal operating
power
(at 20°C 68°F)
Max. applied voltage
(at 20°C 68°F)
27.8Ω
40 Ω
90 Ω
160 Ω
360 Ω
640 Ω
900mW
110%V of
nominal voltage
2. Specifications
Characteristics
Contact
Rating
Electrical
characteristics
Mechanical
characteristics
Expected life
Conditions
Item
Arrangement
Contact resistance (Initial)
Contact material
Nominal switching capacity (resistive load)
Max. switching power (resistive load)
Max. switching voltage
Max. switching current
Nominal operating power
Min. switching capacity (reference value)*1
Insulation resistance (Initial)
Breakdown voltage Between open contacts
(Initial)
Between contact and coil
Surge breakdown voltage*2 (Between contact and
coil) (Initial)
Specifications
1 Form A
Max. 100 mΩ (By voltage drop 6 V DC 1A)
AgSnO2 type
20A 250V AC
6,250VA
250V AC
25A
900mW
100mA, 5V DC
Min. 1,000MΩ (at 500V DC) Measurement at same location as “Breakdown voltage” section.
1,000 Vrms for 1 min. (Detection current: 10 mA)
5,000 Vrms for 1 min. (Detection current: 10 mA)
10,000 V
Operate time (at nominal voltage) (at 20°C 68°F)
(Initial)
Max. 20 ms (excluding contact bounce time.)
Release time (at nominal voltage) (at 20°C 68°F)
(Initial)
Max. 15 ms (excluding contact bounce time) (With diode)
Functional
Destructive
Functional
Vibration resistance
Destructive
Mechanical (at 180 times/min.)
Electrical (at 20 times/min.)
100 m/s2 (Half-wave pulse of sine wave: 11 ms; detection time: 10µs.)
1,000 m/s2 (Half-wave pulse of sine wave: 6 ms.)
10 to 55 Hz at double amplitude of 1.5 mm (Detection time: 10µs.)
10 to 55 Hz at double amplitude of 1.5 mm
Min. 2×106
Min. 105 (resistive load)
Ambient temperature: –40°C to +60°C –40°F to +140°F,
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
20 times/min. (at nominal switching capacity)
Approx. 23 g .81 oz
Shock resistance
Conditions for operation, transport and storage*3
Max. operating speed
Unit weight
* Specifications will vary with foreign standards certification ratings.
Notes: *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.
*2. Wave is standard shock voltage of ±1.2×50μs according to JEC-212-1981
*3. The upper limit of the ambient temperature is the maximum temperature that can satisfy the coil temperature rise value. Refer to Usage, transport and storage
conditions in NOTES.
3. Switching capacity
20 A, 250 V AC (cosφ = 1)
Resistive load
Electrical Life
Compressor load
Inverter load
25 A, 250 V AC (cosφ = 1)
Inrush 70 A (cosφ = 0.7), Steady 20 A (cosφ = 0.9)
250 V AC
Inrush 200 A, Steady 20 A
100 V AC
Inrush 100 A, Steady 10 A
200 V AC
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Min. 105
(at 20 times/min.)
Min. 104
(at 20 times/min.)
Min. 105
(at 20 times/min.)
Min. 3×104
(at 10 times/min.)
Min. 3×104
(at 10 times/min.)
ASCTB195E 201903
LF (ALF)
REFERENCE DATA
2-(1). 200V AC electrical life test
(200V AC, inverter load)
Tested sample：ALF1T12, 6 pcs.
Measured portion：Coil inside
Contact current : 20A
Ambient temperature : 25℃, 60℃
Tested sample：ALF1T12, 6 pcs.
Load：Inrush 102A（wave peak value）,
Steady 14.4A（wave peak value）
Inverter dummy 200V AC
Operation frequency：ON：OFF=1s：5s
Circuit：
Temperature rise（℃）
70
60
25℃
50
60℃
Change of operate and release voltage
12
Operate and release voltage（V）
1. Coil temperature rise
LF relay contact
40
30
2,000μF
200V AC
1.9Ω
20
Contact welding：0times
Miscontact：0times
10
Operate voltage
8
Max.
Ave.
Min.
6
Release voltage
Max.
Ave.
Min.
4
2
10
0
Switch
0
0
80
100
120
Coil applied voltage（%V）
0
3
No. of operations（×104）
6
2-(2). 100V AC electrical life test
(100V AC, inverter load)
Tested sample：ALF1T12, 6 pcs.
Load : Inrush 224A（wave peak value）,
Steady 30.5A（wave peak value）
Inverter dummy 100V AC
Operation frequency：ON：OFF=1s：5s
Circuit :
12
470μF
2,000μF
100V AC
470μF
Operate and release voltage（V）
LF relay contact
Change of operate and release voltage
Contact welding：0times
Miscontact：0times
10
Operate voltage
8
Max.
Ave.
Min.
6
Release voltage
Max.
Ave.
Min.
4
2
0
0
3
No. of operations（×104）
6
2-(3). Inrush 70.7A, Steady 20A, 250V AC
2-(4). Electrical life test
electrical life test (Compressor dummy load)
Tested sample：ALF1T12, 6 pcs.
Operation frequency：ON：OFF=1.5s：1.5s
Change of operate and release voltage
12
Contact welding：0times
Miscontact：0times
10
8
Operate voltage
6
4
Release voltage
Max.
Ave.
Min.
Max.
Ave.
Min.
2
0
Contact welding：0times
Miscontact：0times
10
Operate voltage
8
6
Max.
Ave.
Min.
Release voltage
Max.
Ave.
Min.
4
2
0
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Operate and release voltage（V）
12
Operate and release voltage（V）
Tested sample：ALF1T12, 6 pcs.
Load：Inrush 70.7A, cosφ=0.7
Steady 20A, cosφ=0.9
compressor dummy 250V AC
Operation frequency：ON：OFF=1.5s：1.5s
Circuit：
(20A 250V AC, resistive load)
5
No. of operations（×104）
3
10
0
0
© Panasonic Corporation 2019
10
No. of operations（×104）
20
ASCTB195E 201903
LF (ALF)
DIMENSIONS (mm)
CAD The CAD data of the products with a “CAD” mark can be downloaded from our Website.
1. TMP type
PC board pattern (Bottom view)
External dimensions
12.8
0.8
#250 terminal
27.6
2dia.
6.4
1.8dia.
12
10
23.3
0.5
22
27.6
0.8
1.6
1.6
12
1.8dia.
Tolerance ±0.1
Schematic (Bottom view)
4
0.8
1.6
2dia.
13.8
2
10.2
7.9
11.25
0.8
12
CAD
FASTON #250
0.3
30.1
PC board side
15.7
General tolerance
Less than 1mm：±0.1
Min. 1mm less than 3mm：±0.2
Min. 3mm：±0.3
2. PCB type
PC board pattern (Bottom view)
External dimensions
CAD
27.6
2dia.
2dia.
0.5
12
23.3
13.8
1.8dia.
10
1.8dia.
4
12
0.8
1.6
22
27.6
0.8
1.6
1.6
Tolerance ±0.1
0.3
12
Schematic (Bottom view)
15.7
30.1
SAFETY STANDARDS
UL/C-UL (Recognized)
File No. Contact rating
Temp.
Cycles File No.
E43028 25A 277V AC
40°C 104°F 6 × 103 40009169
20A 277V AC
40°C 104°F
105
* CSA standard: Certified by C-UL
General tolerance
Less than 1mm：±0.1
Min. 1mm less than 3mm：±0.2
Min. 3mm：±0.3
VDE (Certified)
Contact rating
Temp.
Cycles
File No.
20A 250V AC (cosφ =1.0) 60°C 140°F
104 B 12 06 13461 326
—
—
—
—
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TÜV (Certified)
Contact rating
20A 250V AC (cosφ =1.0)
—
TV rating (UL)
Temp.
Cycles File No. Contact rating
60°C 140°F
104 E43028 TV-8
—
—
—
—
© Panasonic Corporation 2019
ASCTB195E 201903
LF (ALF)
EN/IEC VDE Certified
INSULATION CHARACTERISTICS (IEC61810-1)
Item
Clearance/Creepage distance (IEC61810-1)
Category of protection (IEC61810-1)
Tracking resistance (IEC60112)
Insulation material group
Over voltage category
Rated voltage
Pollution degree
Type of insulation (Between contact and coil)
Type of insulation (Between open contacts)
Characteristic
Min. 5.5mm/5.5mm
RT II
PTI 175
III a
III
250V
2
Reinforced insulation
Micro disconnection
NOTES
1. For cautions for use, please read “GENERAL APPLICATION GUIDELINES”.
Please refer to "the latest product specifications"
when designing your product.
• Requests to customers :
https://industrial.panasonic.com/ac/e/salespolicies/
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© Panasonic Corporation 2019
ASCTB195E 201903
GUIDELINES FOR POWER RELAYS AND HIGH-CAPACITY DC CUT OFF RELAYS USAGE
For cautions for use, please read “GUIDELINES FOR RELAY USAGE”.
https://industrial.panasonic.com/ac/e/control/relay/cautions_use/index.jsp
Precautions for Coil Input
Long term current carrying
Maximum allowable voltage and temperature rise
A circuit that will be carrying a current continuously for long periods
without relay switching operation. (circuits for emergency lamps, alarm
devices and error inspection that, for example, revert only during
malfunction and output warnings with form B contacts) Continuous,
long-term current to the coil will facilitate deterioration of coil insulation
and characteristics due to heating of the coil itself.
For circuits such as these, please use a magnetic-hold type latching
relay. If you need to use a single stable relay, use a sealed type relay
that is not easily affected by ambient conditions and make a failsafe
circuit design that considers the possibility of contact failure or
disconnection.
Proper usage requires that the rated coil voltage be impressed on the
coil. Note, however, that if a voltage greater than or equal to the
maximum continuous voltage is impressed on the coil, the coil may
burn or its layers short due to the temperature rise. Furthermore, do
not exceed the usable ambient temperature range listed in the catalog.
Operate voltage change due to coil temperature rise
(Hot start)
In DC relays, after continuous passage of current in the coil, if the
current is turned OFF, then immediately turned ON again, due to the
temperature rise in the coil, the pick-up voltage will become somewhat
higher. Also, it will be the same as using it in a higher temperature
atmosphere. The resistance/temperature relationship for copper wire
is about 0.4% for 1°C, and with this ratio the coil resistance increases.
That is, in order to operate of the relay, it is necessary that the voltage
be higher than the pick-up voltage and the pick-up voltage rises in
accordance with the increase in the resistance value. However, for
some polarized relays, this rate of change is considerably smaller.
DC Coil operating power
Steady state DC current should be applied to the coil. The wave form
should be rectangular. If it includes ripple, the ripple factor should be
less than 5%.
However, please check with the actual circuit since the electrical
characteristics may vary. The rated coil voltage should be applied to
the coil and the set/reset pulse time of latching type relay differs for
each relays, please refer to the relay's individual specifications.
Coil connection
When connecting coils of polarized relays, please check coil polarity
(+,-) at the internal connection diagram (Schematic). If any wrong
connection is made, it may cause unexpected malfunction, like
abnormal heat, fire and so on, and circuit do not work. Avoid
impressing voltages to the set coil and reset coil at the same time.
Ambient Environment
Dew condensation
Usage, Transport, and Storage Conditions
Condensation occurs when the ambient temperature drops
suddenly from a high temperature and humidity, or the relay is
suddenly transferred from a low ambient temperature to a high
temperature and humidity. Condensation causes the failures like
insulation deterioration, wire disconnection and rust etc.
Panasonic Corporation does not guarantee the failures caused
by condensation.
The heat conduction by the equipment may accelerate the
cooling of device itself, and the condensation may occur.
Please conduct product evaluations in the worst condition of
the actual usage. (Special attention should be paid when high
temperature heating parts are close to the device. Also please
consider the condensation may occur inside of the device.)
During usage, storage, or transportation, avoid locations
subjected to direct sunlight and maintain normal temperature,
humidity and pressure conditions.
Temperature/Humidity/Pressure
When transporting or storing relays while they are tube
packaged, there are cases the temperature may differ from the
allowable range. In this case be sure to check the individual
specifications. Also allowable humidity level is influenced by
temperature, please check charts shown below and use relays
within mentioned conditions. (Allowable temperature values
differ for each relays, please refer to the relay's individual
specifications.)
Icing
Condensation or other moisture may freeze on relays when the
temperature become lower than 0°C.This icing causes the sticking of
movable portion, the operation delay and the contact conduction failure
etc. Panasonic Corporation does not guarantee the failures caused by
the icing.
The heat conduction by the equipment may accelerate the cooling of
relay itself and the icing may occur. Please conduct product
evaluations in the worst condition of the actual usage.
Low temperature and low humidity
The plastic becomes brittle if the switch is exposed to a low
temperature, low humidity environment for long periods of time.
High temperature and high humidity
Storage for extended periods of time (including transportation periods)
at high temperature or high humidity levels or in atmospheres with
organic gases or sulfide gases may cause a sulfide film or oxide film to
form on the surfaces of the contacts and/or it may interfere with the
functions. Check out the atmosphere in which the units are to be
stored and transported.
1) Temperature:
The tolerance temperature range differs for each relays,
please refer to the relay’s individual specifications
2) Humidity:
5 to 85 % RH
3) Pressure:
86 to 106 kPa
Humidity, %R.H.
85
Allowable range
(Avoid icing
when used at
temperatures
lower than 0°
C)
5
–40
(Avoid
condensation
when used at
temperatures
higher than
0°
C)
0
Ambient temperature, °
C
85
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ASCTB412E 201903
GUIDELINES FOR POWER RELAYS AND HIGH-CAPACITY DC CUT OFF RELAYS USAGE
Package
In terms of the packing format used, make every effort to keep the
effects of moisture, organic gases and sulfide gases to the absolute
minimum.
Silicon
When a source of silicone substances (silicone rubber, silicone oil,
silicone coating materials and silicone filling materials etc.) is used
around the relay, the silicone gas (low molecular siloxane etc.) may be
produced.
This silicone gas may penetrate into the inside of the relay. When the
relay is kept and used in this condition, silicone compound may adhere
to the relay contacts which may cause the contact failure. Do not use
any sources of silicone gas around the relay (Including plastic seal
types).
NOx Generation
When relay is used in an atmosphere high in humidity to switch a load
which easily produces an arc, the NOx created by the arc and the
water absorbed from outside the relay combine to produce nitric acid.
This corrodes the internal metal parts and adversely affects operation.
Avoid use at an ambient humidity of 85%RH or higher (at 20°C). If use
at high humidity is unavoidable, please contact our sales
representative.
Others
Cleaning
1) Although the environmentally sealed type relay (plastic sealed type,
etc.) can be cleaned, avoid immersing the relay into cold liquid (such
as cleaning solvent) immediately after soldering. Doing so may
deteriorate the sealing performance.
2) Cleaning with the boiling method is recommended(The temperature
of cleaning liquid should be 40°C or lower ).
Avoid ultrasonic cleaning on relays. Use of ultrasonic cleaning may
cause breaks in the coil or slight sticking of the contacts due to
ultrasonic energy.
Please refer to "the latest product specifications"
when designing your product.
•Requests to customers:
https://industrial.panasonic.com/ac/e/salespolicies/
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c Panasonic Corporation 2019
ASCTB412E 201903
2019
ASCTB195E-1 201903
