AHF2
ORDERING INFORMATION
Remark: Standard Packaging: Tube 50 pcs.
SMALL, HIGHLY RELIABLE
TIP SENSOR CONTAINING
A PHOTO SENSOR
AHF2 (TIP)
SWITCHES
Mounting direction Vertical mounting Horizontal mounting Reverse mounting
Part No. AHF21 AHF22 AHF23
PCB mounting condition
FEATURES
• Realizes miniaturization of equipment
and spaces saving. Size of body:
9.5×9.5×9.3 mm
• The contact type is equivalent to
normally closed contacts, which satisfies
the PL Act.
• The internal sphere can be used over
an operation angle of 360 degrees in the
circumferential direction.
• There are three standard terminal
profiles which can be selected according
to the mounting direction of the PCB.
• The terminals are tin-plated for long-
term solderability.
TYPICAL
APPLICATIONS
• Gas heaters
• Electric fans
• Water vallet
• Infrared treatment device
• Electric pots with warming function
Compliance with RoHS Directive
CONTACT TYPE
Normally closed type (The photo transistor is ON when the
sensor is being used.)
APPLICABLE CIRCUIT
Refer to the dimensional diagram for the terminal Nos.
• VCC = 5 V
• R2 = 100 kΩ
• Forward current,
IF, of the LED: 19 mA
(VCC = 5 V, R1 = 200 Ω)
• Forward voltage,
VF, of the LED: Typ = 1.2 V
BASIC CHARACTERISTICS
For Ta = 25°C and applicable circuit conditions
1) Operation characteristics
(Operation speed 6 degrees/second)
• Operation angle (Output: VOL → VOH): 25 to 60 degrees
• Return angle (Output: VOH → VOL): Min. 20 degrees
2) Output (VO) characteristics (The sphere must be stationary.)
• VOL (photo transistor ON): Max. 1.0 V (horizontal)
• VOH (photo transistor OFF): Min. 4.0 V (inclined at an angle of at
least 60 degrees)
Terminal No. 1
Terminal No. 4
Tip switch
Terminal No. 2 Terminal No. 3
VCC
VO
R2
R1
IF
(VCC)
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All Rights Reserved © COPYRIGHT Panasonic Electric Works Co., Ltd.
AHF2
DIMENSIONS mm
SPECIFICATIONS
Item Specificaitons
Electrical and mechanical life
Min. 105 (Using the applicable circuit)
At 6 cpm; Opening and closing position: 0 deg. ↔ 90 deg. (The internal shpere must be stationary for at least
500 ms at angles of 0 and 90 deg. respectively.)
Vibration resistance 10 to 400 Hz acceleration 2.9 m/s2 applied for 7 days
5 to 10 Hz at half amplitude of 5 mm, 5×105 cycles
Shock resistance 588 m/s2 applied 3 times in each of 6 directions
Te r minal strength Min. 9.8 N (each direction)
Dropping individual part Three times from height of 100 cm
High temperature, high humidity
storage ability
Leave for 500 hours at 85°C and 85% RH
(No freezing at low temperature)
High temperature storage ability Leave for 500 hours at 85°C
Low temperature storage ability Leave for 500 hours at –25°C (No freezing at low temperature)
Shock and heat resistance Subject to 100 cycles each consisting of 30 minutes at –25°C and 30 minutes at 85°C.
Resistance to hydrogen sulfide Leave for 500 hours in an atmosphere containing 3 ppm of hydrogen sulfide at 40°C and 75% RH.
Resistance to sulfur dioxide gas Leave for 500 hours in an atmosphere containing 10 ppm of sulfur dioxide at 40°C and 95% RH
Resistance to ammonia gas Leave for 96 hours in an atmosphere containing 3% of ammonia gas at normal temperature and humidity.
Resistance to dust Mix with 2 kg/m3 talcum powder or fly ash and leave to stand for 8 hours
Ambient temperature –20 to +80°C (No freezing nor condensation at low temperature)
Notes:
1.Without any indications, specifications are measured at following conditions
• Temperature: 15 to 35°C
• Humidity: 25 to 85% RH
• Atmospheric pressure: 86 to 106 kpa.
2.The evaluation criteria for performance are as follows:
Basic characteristics – Ta = 25°C and applicable circuit conditions
1) Operation characteristics (operation speed 6 degrees/sec.)
• Operation angle (Output: VOL → VOH): 25 to 60 degrees
• Return angle (Output: VOH → VOL): 20 degrees min.
2) Output (VO) characteristics (The sphere must be stationary.)
• VOL (photo transistor ON): 1.2 V max. (horizontal)
• VOH (photo transistor OFF): 3.8 V min. (inclined at an angle of at least 60 degrees)
• Horizontal mounting type
Terminal No. 1
(LED: Anode)
Terminal No. 4
(Photo transistor: Emitter)
PC
board
Horizontal
datum line
Horizontal
datum line
Terminal No. 3
(Photo transistor: Collector)
Terminal No. 2
(LED: Cathode)
6.55
1.7 5
9.3
3.7
0.9
4.0 3.1
5.1
9.5
3.0
2.6
9.5 dia.
C0.3 C0.3
7.9
9.5
11.5
PC board pattern (Bottom view)
Terminal No. 1
(LED: Anode) Terminal No. 2
(LED: Cathode)
Terminal No. 4
(Photo transistor: Emitter)
1.3 dia.
Terminal No. 3
(Photo transistor:
Collector)
3.1±0.1
11.9±0.1
5.1±0.1
• Vertical mounting type
5.1±0.4 0.9
2.6
3.1±0.4
Terminal No. 1 Terminal No. 2
Terminal No. 4 Terminal No. 3
11.5±0.5
PC board
PC board pattern (Bottom view)
Terminal No. 4
(Photo transistor: Emitter)
Terminal No. 2
(LED: Cathode)
Terminal No. 3
(Photo transistor:
Collector)
Terminal No. 1
(LED: Anode)
5.1±0.1
11.9±0.1
3.1±0.1
1.3 dia.
All Rights Reserved © COPYRIGHT Panasonic Electric Works Co., Ltd.
AHF2
NOTES
• Reverse mounting type
Terminal No. 1
Terminal No. 4
Terminal No. 2
Terminal No. 3 5.1±0.5
3.1±0.5
11.5±0.7 2.6 0.9
PC board
11.9
mm
PC board pattern (Bottom view) [Internal circuit and applicable circuit]
Terminal No. 4
(Photo transistor: Emitter)
Terminal No. 2
(LED: Cathode)
Terminal No. 3
(Photo transistor: Collector)
Terminal No. 1
(LED: Anode)
11.9±0.1
3.1±0.1 5.1±0.1
1.3 dia.
Terminal No. 1
Terminal No. 4
Tip switch
Terminal No. 2 Terminal No. 3
VCC
VO
R2
R1
IF
(VCC)
1. Handling
1) In the enent that a voltage or current
that exceeds the maximum rating is
applied to, or passed between the
terminals, the photo-transistor will no
longer function normally. In such a case,
do not reuse the photo-transistor but
discard it.
2) Be careful not to apply an excessively
large load to the terminals because this
may damage the photo-transistor.
2. Soldering
1) When soldering by hand, use a 18W
soldering iron that has a temperature
regulator (iron tip temperature must be no
more than 350°C) and apply the tip to the
joint for no more than 3 seconds.
2) When performing automatic soldering,
ensure that the board does not remain in
the solder bath for more than 10 seconds
at 260°C, or more than 3 seconds at
350°C.
3) Be careful not to move the terminals
for one minute after soldering them.
3. Environment
This product is a non-contact type tip
detection switch containing a photo-
interrupter. It is intended for installation in
equipment. Because of the nature of a
semiconductor, if this product is used
continuously for a long period in a high
temperature, low temperature and/or
humid environment, according to the
optic quantities decrease of luminescent
diode output characteristics may be
significantly affected. In such a case, take
suitable measures, such as inserting a
comparator at the output side, to provide
a greater degree of margin with respect
to change in the output characteristics,
and thereby improve the reliability of the
product.
4. Preventing a malfunction
1) The tip sensor uses an internal sphere,
hence chattering occurs if it is subjected
to vibration or shock. To prevent
chattering, continuously read pulses of
30 ms max. using a microprocessor, and
set the microprocessor so that the switch
goes L (ON) or H (OFF) if the output level
exceeds 500 ms continuously. Also, take
steps to keep induction and RF noise
away from the sensor.
2) The switch should be mounted keeping
away from the vibration generator such
as motor. Fix the PC board firmly in order
to prevent resonance with the vibration
generator, or the contact chattering of a
switch may occur by the movement of a
ball inside. The allowable vibration level
which the chattering does not occur
would be less than {0.3G} at 10 to 260Hz
and 320 to 400Hz. The range 260 to
320Hz may have a resonance point and
the level should be less than 0.1G.
5. Others
1) Depending on the circuitry and the
environmental conditions, solder
migration may occur and short a circuit.
Please confirm that the insulation
distance is large enough in the actual
application.
2) To prevent a malfunction, the switch
should be kept away from the direct
sunlight and any other light sources.
3) The noises caused by electrostatics,
surge voltage and inductives may break
the photo-interruptor.
4) The reflow soldering and cleaning are
not allowed.
5) The switch should be mounted with the
tolerance ±3 degree.
6. Confirmations in the actual use.
Each items in this spec sheet was tested
and confirmed independently at a certain
duration. To get a higher reliability of the
equipment, please confirm the switch
quality with the actual load and
environmental conditions before using.
Output of Tip switch
Max. 30 ms
continuous H for 500 ms or more
Judgement of switch
OFF state
Transistor OFF
Transistor ON
All Rights Reserved © COPYRIGHT Panasonic Electric Works Co., Ltd.
