TDK Capacitor Compact Form Factors for DC Link Applications

TDK Corporation (TSE:6762) has extended the portfolio of EPCOS TDK Capacitor for DC link applications with the B3277*X/Y/Z series. The new capacitors feature compact dimensions, high capacitance density and high current capability. They are designed for rated voltages of between 500 and 1200 V DC. The series offers numerous standard capacitance values within the range from 1.5 to 170 μF.

Depending on the voltage and capacitance, their lead spacings are 27.5, 37.5 and 52.5 mm, with both 4-pin or 2-pin versions available for each lead spacing. The maximum operating temperature of these RoHS-compatible components is 105 °C. At a rated voltage and an operating temperature of 85 °C the typical service life of the self-healing capacitors is 60,000 hours.

The MKP capacitors are suitable for use in DC link circuits, as DC filters and for power factor correction for industrial converters, as well as for power supplies with higher reliability requirements. These applications include X-ray equipment, LED street lighting, induction hobs and electrical chargers.

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Features

  • Robust design thanks to aluminum can and top
  • Compact dimensions
  • Integrated overpressure disconnection safety device

Application

  • Frequency converters
  • Inverter based home appliances
  • Solar inverters
  • Variable speed motor drives

Specification

Operating temperature range Max. operating temperature, THot Spot, max

Upper category temperature Tmax. Lower category temperature Tmin.

+105 ºC

+85 ºC

-40 ºC

Insulation Resistance RINS, given as

time constant t = CR • RINS, rel. humidity ≤65% (minimum as-delivered values)

t >10 000 s (after 1 min)

For VR ≥500 V measured at 500 V For VR <500 V measured at VR

DC voltage test between terminals (10 s) 1.5 • VR
Voltage test terminal to case (10 s) 2110 V AC, 50Hz
Reliability: Failure rate l 75 fit (≤1 • 10-9) at 0.5 • VR, 40 ºC
For conversion to other operating conditions and
temperatures, refer to chapter “Quality, 2 Reliability”
Service life tSL 100 000 h at VR, 70 ºC
VR (DC) 450 V 800 V 1100 V 1300 V
Continuous operation voltage (Vop) at Top of 85 ºC 450 V 800 V 1100 V 1300 V
For temperatures between 85 ºC and 105 ºC 2.5% / ºC of Vop derating compared to Vop at 85 ºC

 

Test Reference Conditions of test Performance requirements
Electrical parameters (Routine test) IEC61071: 2007 Voltage between terminals,

1.5 VR, during 10 s

Insulation resistance, RINS at VR if VR

<500 V or 500 V if VR ≥500 V

Within specified limits
Capacitance, C at 1 kHz
(room temperature)
Dissipation factor, tan d at 1/10 kHz
(room temperature)
Robustness of terminations (Type test) IEC 60068-2-21: 2006 Tensile strength (test Ua1) Capacitance and tan d

within specified limits

Wire diameter Tensile force
0.8 <d1 ≤1.25 mm

>1.25 mm

20 N

40 N

Resistance to soldering heat (Type test) IEC 60068-2-20: 2008,

test Tb, method 1A

Solder bath temperature at 260 ±5 °C, immersion for 10 seconds |∆C/C0| ≤2%

|∆tan d| ≤0.002

RINS ≥50% of initial limit Mechanical:

No visible damage
Rapid change of temperature

(Type test)

IEC 61071: 2007 TA = lower category temperature TB = upper category temperature Five cycles, duration t = 30 min |∆C/C0| ≤2%

|∆tan d| ≤0.002

RINS ≥50% of initial limit Mechanical:

No visible damage
Vibration and shocks

(Type test)

IEC 61071: 2007 In accordance with IEC 60068-2-6 f = 10 Hz to 55 Hz a = ±0.35 mm

Test duration per axis = 10 frequency cycles

(3 axes offset from each other by 90°), 1 octave/min.

Electrical:

|∆C/C0| ≤0.5% at 1 kHz

 

Mechanical:

No visible damage

Mounting conditions:
The leads shall fix the capacitor and the body must be properly clamped.
Climatic sequence (Type test) IEC 60384-16: 2005 Dry heat Tb / 16 h

Damp heat cyclic, 1st cycle

+55 °C / 24 h / 95% … 100% RH

Cold Ta / 2 h

Damp heat cyclic, 5 cycles

No visible damage

|∆C/C0| ≤3%

|∆tan d| ≤0.001

RINS ≥ 50% of initial limit

+55 °C / 24h / 95% … 100% RH
Test Reference Conditions of test Performance requirements
Damp heat IEC 60384-16: 2005 Test Ca No visible damage
Steady state 40 °C / 93% RH / 56 days |∆C/C0| ≤5%
(Type test) I∆tan d| ≤0.005
RINS ≥50% of initial limit
Endurance (Type test) IEC 61071: 2007 +85 °C / 1.3 VR / 500 hours and

1000 discharges at 1.4 IR and

+85 °C / 1.3 VR / 500 hours

No visible damage

|∆C/C0| ≤3%

|∆tan d| 0.015 (10 kHz)

RINS ≥50% of initial limit
Mechanical:
No visible damage