Aluminum electrolytic capacitor
K50-86

TU 6270-008-07628635-2007

Capacitor type is used for operation in direct current, ripple and pulse current circuits. The capacitor is available in all-climate (isolated and non-isolated) and temperate/cold climate version (isolated).

It is recommended to use this capacitor type as substitution for capacitors K50-18, K50-27, K50-37, K50-77 types.




Main parameters
NameValue
Rated voltage, V 250…485
Rated capacitance, µF 1 000…6 800
Temporary overvoltage within 10 sec., V 1.15 UR (UR=250)
1.1 UR (UR>250)
Capacitance tolerance (25 °C, 50 Hz), % +30…-10; ±20
Maximum operating temperature Tenv, °C +85
Minimal operating temperature Tenv, °C -40



Capasitor physical configuration
variant A

Temperate/cold climate version (Isolated)

All climate version (Nonisolated)

All climate version (Isolated)


variant B

Temperate/cold climate version (Isolated)

Cap.1st variant (for sizes 65x70; 65x105; 65x140; 76x142; 90x140)

Cap.2nd variant (for sizes76x105; 76x146; 90x146)

1 - Isolation sleeve
2 - Explosion-proof valve
3 - Connecting strip for discharge
4 - Lacquer coating
D, mm A, mm
65 28.5±0.15
76 32.0±0.15
90 32.0±0.15



Overall and fitting dimensions of a capacitor clamp
1 - clamp
2 - screw BM4-6gx12.48.019 GOST 17473
3 - washer A4,0.01.08 kp.019 GOST 11371
4 - nut M4-6N.04.019 GOST 5916


D' D'' L Mass, g, max
66.2±0.2 78.6 88.6 59.7
77.2±0.2 89.6 99.6 69.6
91.2±0.2 103.6 113.6 82.2



Capacitors overall dimensions and mass
UR, V 250 350 400 450 485
CR, µF DxL,mm
mass, g
1 000 65x70
400
1 500 65x105
800
65x105
600
2 000 76x142
1 100
2 200 65x105
800
3 300 65x105
600
76x105
740
4 700 65x140
800
65x140
800
76x142
1 100
76x146
960
90x140
1 320
6 800 90x140
1 400
90x146
1 345



Capacitor electric parameters value when delivered
UR, V CR, µF tg δ, %,
25 °C, 50 Hz, max
ILEAK, µA,
25 °C, after 5 min., max
Z, Ohm,
25 °C, 20kHz, max
ESR, Ohm,
25 °C, 100Hz, max
Mspec, g/C⋅h, max IR, А,
85 °C, 50 Hz, max
50 Hz 100 Hz
250 4 700 10 5 203 0.11 0.1 0.041 8.5 10.6
350 4 700 6 156 0.05 0.03 0.040 9.3 11.6
400 1 000 2 466 0.16 0.13 0.079 3.7 4.6
1 500 3 021 0.11 0.09 0.083 4.8 6.0
2 200 3 658 0.07 0.06 0.057 6.4 8.0
3 300 5 514 0.05 0.04 0.038 8.8 11.0
0.049 0.036 0.044 10.7 13.4
4 700 6 581 0.034 0.03 0.042 11.2 14.0
6 800 9 235 0.024 0.024 0.034 15.2 19.0
450 1 500 3 204 0.15 0.13 0.074 5.2 6.5
2 000 3 700 0.13 0.09 0.088 6.4 8.0
485 4 700 8 455 0.08 0.06 0.040 12.1 15.1



Ripple current effective value
versus temperature and frequency can be found from the formula IRO = IR x KT x KF, where

IR- allowable ripple current at 85 °C, 50 Hz (See Table "Capacitor electric parameters")

KT - IR correction factor versus temperature
Tenv, °C 25 40 50 60 70 85
KT 65x70; 65x105; 65x140; 76x142; 90x140 (mm x mm)
1.7 1.58 1.46 1.33 1.2 1.0
76x105; 76x146; 90x146 (mm x mm)
2.4 2.3 2.2 2.0 1.7 1.0



KF - IR correction factor versus frequency
F, Hz 50 100 200 300 400 500 1 000 ≥2 000
KF 1 1.25 1.4 1.48 1.52 1.54 1.58 1.6



Capacitors reliability
Reliability
Operation modes
Minimal nonfailure operating time, tλ, hours Capacitor failure rate, λ, 1/hour, max
Maximum-permissible mode (UR, Tenv=85 °С)
size DxH, mm: 65x70; 65x105; 65x140; 76x142; 90x140
12 000 5x10-5
Maximum-permissible mode (UR, Tenv=85 °С)
size DxH, mm: 76x105; 76x146; 90x146
13 000 5x10-5
Light mode (0.5UR, Tenv=50 °С)
size DxH, mm: 65x70; 65x105; 65x140; 76x142; 90x140
150 000 3x10-7
Light mode (0.5UR, Tenv=50 °С)
size DxH, mm: 76x105; 76x146; 90x146
160 000 3x10-7
Storageability
Gamma-rated time of capacitor storageability Tcy at y=95%, years, min
20
Service life (UR, Tenv=85 °C), hour, min
size DxH, mm: 65x70; 65x105; 65x140; 76x142; 90x140
size DxH, mm: 76x105; 76x146; 90x146

18 000

20 000
Pulsed service life:
(UR; Tcharge ≥ 0.1 s; Rdischarge ≥ 1 Ohm; 25°C), cycles, min.
106



Example of reference designation for ordering:

CAPACITOR K50-86a - 400V - 4700µF ±20% (76x142) B TU 6270-008-07628635-2007

CAPACITOR K50-86a - 400V - 4700µF ±20% (76x142) B I TU 6270-008-07628635-2007

CAPACITOR K50-86b - 400V - 4700µF ±20% (76x142) I TU 6270-008-07628635-2007