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© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com

A4031_ALS30_31 • 4/3/2014

Screw Terminal Aluminum Electrolytic Capacitors – ALS30/31 Series, +85°C

MTBF

The mean time between failures (MTBF) is simply the inverse of the failure rate.

MTBF= 1/λ

wear out

early failures

operational life

Time

The failure rate is derived from our periodic test results. The failure rate (λ

estimation is also given at 40°C. The expected failure rate for this capacitor range is based on our periodic test results for capacitors

per hour includes both catastrophic and parametric failures.

T

a

Failure Rate per Hour

85°C 250 FIT

40°C 12 FIT

Environmental Compliance

As an environmentally conscious company, KEMET is working continuously with improvements concerning the environmental effects

of both our capacitors and their production. In Europe (RoHS Directive) and in some other geographical areas like China, legislation

has been put in place to prevent the use of some hazardous materials, such as lead (Pb), in electronic equipment. All products in this

catalog are produced to help our customers’ obligations to guarantee their products and fulfill these legislative requirements. The only

material of concern in our products has been lead (Pb), which has been removed from all designs to fulfill the requirement of containing

less than 0.1% of lead in any homogeneous material. KEMET will closely follow any changes in legislation world wide and makes any

necessary changes in its products, whenever needed.

Some customer segments such as medical, military and automotive electronics may still require the use of lead in electrode coatings.

To clarify the situation and distinguish products from each other, a special symbol is used on the packaging labels for RoHS compatible

capacitors.

Because of customer requirements, there may appear additional markings such as LF = Lead Free or LFW = Lead Free Wires on the

label.