Datasheet

9© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com A4038_PEH169_105ºC • 2/7/2017
Screw Terminal Aluminum Electrolytic Capacitors – PEH169 Series, +105°C
Mechanical Data
Polarity and Reversed Voltage
Aluminium Electrolytic capacitors manufactured for use in DC applications contain an anode foil and a cathode foil. As such,
they are polarized devices and must be connected with the +ve to the anode foil and the -ve to the cathode foil. If this were
to be reversed then the electrolytic process that took place in forming the oxide layer on the anode would be recreated in
trying to form an oxide layer on the cathode. In forming the cathode foil in this way, heat would be generated and gas given
off within the capacitor, usually leading to catastrophic failure.
The cathode foil already possesses a thin stabilized oxide layer. This thin oxide layer is equivalent to a forming voltage
of approximately 2 V. As a result, the capacitor can withstand a voltage reversal of up to 2 V for short periods. Above this
voltage, the formation process will commence. Aluminium Electrolytic capacitors can also be manufactured for use in
intermittent AC applications by using two anode foils in place of one anode and one cathode.
Mounting Position
The capacitor can be mounted upright or inclined to a horizontal position.
Clamp Fixing
Clips must be ordered separately.
Stud Fixing
Nylon cap nut must be ordered separately. For the stud xing insulated version, the outer insulation serves as lock washer.
Maximum tightening torque:
M8 = 3 Nm
M12= 8 Nm
Maximum chassis thickness 5 mm.
Screw Terminals
M5 x 10 according to DIN 41.248.
Maximum tightening torque = 2.5 Nm.
Must be ordered separately.
Recommended maximum connector thickness with delivered screw = 4 mm. M6 thread upon request.
Insulating Cup
PEH169 is supplied with a 0.8 mm thick polypropylene insulating cup. Voltage proof of the insulating cup: ≥ 4,000 VDC