MFT
B 32 582 …
B 32 584
Technical data
Climatic category
in accordance with IEC 60068-1
Lower category temperature Tmin
Upper category temperature Tmax
Damp heat test
Limit values after damp heat test
Reliability:
Reference conditions
Failure rate
Service life
Failure criteria:
Total failure
Failure due to variation
of parameters
DC test voltage
Category voltage VC
Operation with dc voltage or
ac voltage Vrms up to 60 Hz
Category voltage for
short operating periods
Dissipation factor tan δ (in 10−3)
at 20 °C
(upper limit values)
40/120/56
− 40 °C
+ 120 °C
56 days/40 °C/93 % relative humidity
Capacitance change |∆C/C|
Dissipation factor change ∆ tan δ
Insulation resistance Ris
≤5%
≤ 5 ⋅ 10−3 (at 1 kHz)
≥ 50 % of minimum
as-delivered values
0,5 ⋅ VR; 40 °C
2 ⋅ 10−9/h = 2 fit
For a conversion table for other operating conditions and tem-
peratures, refer to chapter “Quality assurance”, page 327.
200 000 h
Short circuit or open circuit
Capacitance change |∆C/C|
> 10 %
Dissipation factor tan δ
> 4 ⋅ upper limit value
Insulation resistance Ris
< 1500 MΩ
1,6 ⋅ VR, 2 s
T ≤ 85 °C: VC = 1,0 ⋅ VR or 1,0 ⋅ Vrms
T = 100 °C: VC = 0,8 ⋅ VR or 0,8 ⋅ Vrms
T = 120 °C: VC = 0,5 ⋅ VR or 0,5 ⋅ Vrms
T ≤ 100 °C: VC = 1,25 ⋅ VR or 1,0 ⋅ Vrms for max. 2000 h
T ≤ 125 °C: VC = 0,6 ⋅ VR or 0,5 ⋅ Vrms for max. 1000 h
at 1 kHz: 8 ⋅ 10−3
at 10 kHz: 15 ⋅ 10−3
at 100 kHz: 25 ⋅ 10−3
Insulation resistance Ris
at 20 °C, rel. humidity ≤ 65 %
(minimum as-delivered values)
> 10 GΩ
112 12/00