Cabo energy discharge capacitors for defibrillator

Capacitors play an important role in defibrillators .They collect the continuous low flow of current, store it, and then release it as a brief large flow of current . The delivery of high energy electric pulse to the heart can correct an arrhythmia and save lives. Generally, the duration is 4~10ms and electrical energy is 40~400J per time .

Defibrillator work circuit

Specially designed for application in Class II medical devices, Cabo’s MKMJ-MD series capacitors meet high reliability requirement. With reliable lifetime,military technologies and high energy density , MKMJ-MD series are widely used in automated external defibrillators (AEDs) now . They are mainly exported to Germany, France, Switzerland, Italy, Turkey, SouthKorea and Brazil, and verified by many customers that the charge/discharge times are not less than 10000 times, and the failure rate is below 50 fit.

In mass production of MKMJ-MD series, we arrange 100% full inspection to the capacitors before packaging , to ensure they can work normally.

Test 1. Test voltage between terminals

Test method：Apply 1.04~1.5 times the rated voltage between the capacitor terminals for aperiod of time and get the voltage drop curve   .

Test requirement: During the test, there shall be no permanent breakdown ,but self-healing breakdown is allowed. Check the capacitance value of capacitor, capacity change rate and tanθ should be within a certain range.

Test 2. Charge-Discharge For 30 Times Test (Life Test)

Test method:

(1) Apply rated voltage to the terminals of the capacitor (Charging the capacitor from a low voltage to the rated voltage) under the normal temperature environment.

(2) Holding time 20s.

(3) Pulse discharge with 50Ω discharge resistance.

Test Requirement：

(1) No breakdown and flashover on the capacitor.

(2) Capacitance change rate ≤ 3%.

Except the 100% full inspection, we will also arrange random inspection on different solutions to ensure their feasibility .

Voltage holding test

Test requirement: The internal parallel resistance must be＞20 mΩ. Example: 2200V 45s, under normal temperature, the voltage attenuation should be ＜80v (preferably＜50V), and the voltage drop is required to be ＜4%. This test needs to be arranged again at the temperature of 50℃.

Application: Cabo defibrillator capacitor with small size while lagre capacitance

Capacitance: 115μF

Energy: 304.2J

Rated voltage: 2300Vdc

Dimension: D*H=50*117mm

Expected lifetime: ≥60000h @Un, θhotspot≤50℃