© Panasonic Corporation 2019
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industrial.panasonic.com/ac/e/ ASCTB195E 201903
2019.03
ORDERING INFORMATION
TYPICAL APPLICATIONS
FEATURES
LF RELAYS (ALF)
Load for air conditioner
1 Form A 20A power relays
1. Ideal for compressor and inverter
loads
1) Compressor load: 20A 250V AC
2) Inverter load: 20A 100V AC,
10A 200V AC
2. Long insulation distance
• Creepage distance and clearances
between contact and coil;
Creepage Min. 9.5mm .374inch/
Clearance Min. 8mm .315inch
• Surge withstand voltage: 10,000V
3. “PCB” and “TMP” types available
4. Conforms to the various safety
standards:
UL/C-UL, TÜV and VDE approved
1. Air conditioner
2. Refrigerators
3. OA equipment
（
Unit
：
mm
）
Protective construction：Flux-resistant type
TMP type PCB type
23.323.3
15.7
15.7
23.323.3
15.7
15.7
30.130.130.130.1
ALF 1
Contact arrangement
１ Form A
Nominal coil voltage
（DC）
05：5V, 06：6V, 09：9V
12：12V, 18：18V, 24：24V
Terminal shape
T：TMP type
P：PCB type
Note：Certified by UL/C-UL,VDE and TÜV
TYPES
Contact arrangement Nominal coil voltage Part No.
TMP type PCB type
1 Form A
5V DC ALF1T05 ALF1P05
6V DC ALF1T06 ALF1P06
9V DC ALF1T09 ALF1P09
12V DC ALF1T12 ALF1P12
18V DC ALF1T18 ALF1P18
24V DC ALF1T24 ALF1P24
Standard packing: Carton 50 pcs., Case 200 pcs.
Automation Controls Catalog
LF (ALF)
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© Panasonic Corporation 2019 ASCTB195E 201903
2. Specications
* Specications will vary with foreign standards certication 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
RATING
1.Coil data
• Operating characteristics such as ‘Operate voltage’ and ‘Release voltage’ are inuenced 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)
Drop-out voltage
(at 20°C 68°F)
Nominal operating
current
[±10%] (at 20°C 68°F)
Coil resistance
[±10%] (at 20°C 68°F)
Nominal operating
power
(at 20°C 68°F)
Max. applied voltage
(at 20°C 68°F)
5V DC
70%V or less of
nominal voltage
(Initial)
10%V or more of
nominal voltage
(Initial)
180 mA 27.8Ω
900mW 110%V of
nominal voltage
6V DC 150 mA 40 Ω
9V DC 100 mA 90 Ω
12V DC 75 mA 160 Ω
18V DC 50 mA 360 Ω
24V DC 37.5mA 640 Ω
Characteristics Item Specications
Contact
Arrangement 1 Form A
Contact resistance (Initial) Max. 100 mΩ (By voltage drop 6 V DC 1A)
Contact material AgSnO2 type
Rating
Nominal switching capacity (resistive load) 20A 250V AC
Max. switching power (resistive load) 6,250VA
Max. switching voltage 250V AC
Max. switching current 25A
Nominal operating power 900mW
Min. switching capacity (reference value)*1100mA, 5V DC
Electrical
characteristics
Insulation resistance (Initial) Min. 1,000MΩ (at 500V DC) Measurement at same location as “Breakdown voltage” section.
Breakdown voltage
(Initial)
Between open contacts 1,000 Vrms for 1 min. (Detection current: 10 mA)
Between contact and coil 5,000 Vrms for 1 min. (Detection current: 10 mA)
Surge breakdown voltage*2 (Between contact and
coil) (Initial) 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)
Mechanical
characteristics
Shock resistance Functional 100 m/s2 (Half-wave pulse of sine wave: 11 ms; detection time: 10µs.)
Destructive 1,000 m/s2 (Half-wave pulse of sine wave: 6 ms.)
Vibration resistance Functional 10 to 55 Hz at double amplitude of 1.5 mm (Detection time: 10µs.)
Destructive 10 to 55 Hz at double amplitude of 1.5 mm
Expected life Mechanical (at 180 times/min.) Min. 2×106
Electrical (at 20 times/min.) Min. 105 (resistive load)
Conditions Conditions for operation, transport and storage*3Ambient temperature: –40°C to +60°C –40°F to +140°F,
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
Max. operating speed 20 times/min. (at nominal switching capacity)
Unit weight Approx. 23 g .81 oz
Electrical Life
Resistive load
20 A, 250 V AC (cosφ = 1) Min. 105
(at 20 times/min.)
25 A, 250 V AC (cosφ = 1) Min. 104
(at 20 times/min.)
Compressor load Inrush 70 A (cosφ = 0.7), Steady 20 A (cosφ = 0.9)
250 V AC
Min. 105
(at 20 times/min.)
Inverter load
Inrush 200 A, Steady 20 A
100 V AC
Min. 3×104
(at 10 times/min.)
Inrush 100 A, Steady 10 A
200 V AC
Min. 3×104
(at 10 times/min.)
LF (ALF)
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REFERENCE DATA
2-(1). 200V AC electrical life test
(200V AC, inverter load)
1. Coil temperature rise
800 100 120
70
60
50
40
30
20
10
0
60℃
60℃
25℃
25℃
Tested sample：ALF1T12, 6 pcs.
Measured portion：Coil inside
Contact current :20A
Ambient temperature :25℃, 60℃
Temperature rise
（℃）
Coil applied voltage
（%V）
200V AC
200V AC
1.9Ω
LF relay contact
Switch
2,000
μ
F
0 63
0
2
4
6
8
10
12
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：
Max.Max.
Ave.Ave.
Min.Min.
Ave.Ave.
Max.
Min.
Contact welding：0times
Miscontact：0times
Contact welding：0times
Miscontact：0times
Change of operate and release voltage
Operate and release voltage
（V）
No. of operations
（×104）
Release voltageRelease voltage
Operate voltage
Operate voltage
2-(2). 100V AC electrical life test
(100V AC, inverter load)
470μ
F
470
μ
F
2,000
μ
F
LF relay contact
100V AC
100V AC
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 :
Max.Max.
Ave.Ave.
0 63
0
2
4
6
8
10
12
Min.Min.
Ave.Ave.
Max.
Min.
Contact welding：0times
Miscontact：0times
Contact welding：0times
Miscontact：0times
Change of operate and release voltage
Operate and release voltage
（V）
No. of operations
（×104）
Release voltageRelease voltage
Operate voltage
Operate voltage
2-(3). Inrush 70.7A, Steady 20A, 250V AC
electrical life test (Compressor dummy load)
0 105
0
2
4
6
8
10
12
Ave.Ave.
Ave.Ave.
Max.
Min.
Contact welding：0times
Miscontact：0times
Contact welding：0times
Miscontact：0times
Change of operate and release voltage
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：
Max.Max.
Min.Min.
Operate and release voltage
（V）
No. of operations
（×104）
Release voltageRelease voltage
Operate voltage
Operate voltage
Max.
Min.
Tested sample：ALF1T12, 6 pcs.
Operation frequency：ON：OFF=1.5s：1.5s
0 2010
0
2
4
6
8
10
12
Max.Max.
Ave.Ave.
Min.Min.
Ave.Ave.
Contact welding：0times
Miscontact：0times
Contact welding：0times
Miscontact：0times
Operate and release voltage
（V）
No. of operations
（×104）
Release voltageRelease voltage
Operate voltage
Operate voltage
2-(4). Electrical life test
(20A 250V AC, resistive load)
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© Panasonic Corporation 2019 ASCTB195E 201903
DIMENSIONS (mm)
PC board pattern (Bottom view)
External dimensions
1. TMP type
Schematic (Bottom view)
PC board pattern (Bottom view)
External dimensions
2. PCB type
Schematic (Bottom view)
SAFETY STANDARDS
* CSA standard: Certied by C-UL
0.8 0.8
7.9
2
6.4
10.2
#250 terminal
0.5
23.3
4
11.25 12.8
0.31.6
General tolerance
Less than 1mm：±0.1
Min. 1mm less than 3mm：±0.2
Min. 3mm：±0.3
0.8 0.8
121.61.6
22
27.6
15.7
30.1
Tolerance ±0.1
1012
12
27.6
13.8
2dia. 2dia.
1.8dia. 1.8dia.
FASTON #250
PC board side
0.5
23.3
4
0.31.6
General tolerance
Less than 1mm：±0.1
Min. 1mm less than 3mm：±0.2
Min. 3mm：±0.3
0.80.8
121.61.6
22
27.6
15.7
30.1
Tolerance ±0.1
1012
12
27.6
13.8
2dia. 2dia.
1.8dia. 1.8dia.
UL/C-UL (Recognized) VDE (Certied) TÜV (Certied) TV rating (UL)
File No. Contact rating Temp. Cycles File No. Contact rating Temp. Cycles File No. Contact rating Temp. Cycles File No. Contact rating
E43028 25A 277V AC 40°C 104°F 6 × 10340009169 20A 250V AC (cosφ =1.0) 60°C 140°F 104B 12 06 13461 326 20A 250V AC (cosφ =1.0) 60°C 140°F 104E43028 TV-8
20A 277V AC 40°C 104°F 105— — — — — — — — —
CAD
CAD
CAD The CAD data of the products with a “CAD” mark can be downloaded from our Website.
LF (ALF)
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EN/IEC VDE Certied
INSULATION CHARACTERISTICS (IEC61810-1)
NOTES
1. For cautions for use, please read “GENERAL APPLICATION GUIDELINES”.
Please refer to "the latest product specications"
when designing your product.
• Requests to customers :
https://industrial.panasonic.com/ac/e/salespolicies/
Item Characteristic
Clearance/Creepage distance (IEC61810-1) Min. 5.5mm/5.5mm
Category of protection (IEC61810-1) RT II
Tracking resistance (IEC60112) PTI 175
Insulation material group III a
Over voltage category III
Rated voltage 250V
Pollution degree 2
Type of insulation (Between contact and coil) Reinforced insulation
Type of insulation (Between open contacts) Micro disconnection
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Humidity, %R.H.
Allowable range
85
5
0 85–40
(Avoid
condensation
when used at
temperatures
higher than
0°C
(Avoid icing
when used at
temperatures
lower than 0°C)
Ambient temperature, °C
)
GUIDELINES FOR POWER RELAYS AND HIGH-CAPACITY DC CUT OFF RELAYS USAGE
Long term current carrying
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 a󰀨ected by ambient conditions and make a failsafe
circuit design that considers the possibility of contact failure or
disconnection.
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 di󰀨ers for
each relays, please refer to the relay's individual specications.
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, re and so on, and circuit do not work. Avoid
impressing voltages to the set coil and reset coil at the same time.
Usage, Transport, and Storage Conditions
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 di󰀨er from the
allowable range. In this case be sure to check the individual
specications. Also allowable humidity level is inuenced by
temperature, please check charts shown below and use relays
within mentioned conditions. (Allowable temperature values
di󰀨er for each relays, please refer to the relay's individual
specications.)
Maximum allowable voltage and temperature rise
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.
Precautions for Coil Input
Ambient Environment
For cautions for use, please read “GUIDELINES FOR RELAY USAGE”.
https://industrial.panasonic.com/ac/e/control/relay/cautions_use/index.jsp
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
Dew condensation
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.)
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 sulde gases may cause a sulde lm or oxide lm 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.
ASCTB412E 201903
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-2-
GUIDELINES FOR POWER RELAYS AND HIGH-CAPACITY DC CUT OFF RELAYS USAGE
Package
In terms of the packing format used, make every e󰀨ort to keep the
e󰀨ects of moisture, organic gases and sulde gases to the absolute
minimum.
Silicon
When a source of silicone substances (silicone rubber, silicone oil,
silicone coating materials and silicone lling 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).
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 specications"
when designing your product.
•Requests to customers:
https://industrial.panasonic.com/ac/e/salespolicies/
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 a󰀨ects 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.
ASCTB412E 201903
2019
ASCTB195E-1 201903