Session Timeout

Your session is about to expire. Do you want to extend the session?

00:

Extend My Session

Custom Meta Tags

Inverters and Drives from TDK - Hero Banner

Inverters & Drives from TDK

Mixed Media - Protection

Protection

High inrush currents occur when switched mode power supplies are turned on. Such high currents are caused by the extremely low impedance of smoothing capacitors or coils which almost produce short circuits at the moment of switching on. Thermistors acting as inrush current limiters are a low cost solution to this problem whilst input varistors are used to provide surge protection against voltage spikes on the input. Gas surge arresters provide protection for N-PE applications.

Table - Thermistors

Thermistors

Product Type	Series	Technical Data	Datasheet	Features Overview
Leaded NTC	S364	Rated resistance at +25 °C: 1 … 10 Ω Imax: up to 16 A Operating voltage Vrms: 265 V Load capacitance up to 1000µF	Download	NTC Thermistors Limiting of inrush current Wide resistance range Lead spacing 5 and 7.5mm UL approval
Leaded NTC	S464	Rated resistance at +25 °C: 1 … 10 Ω Imax: up to 20 A Operating voltage Vrms: 265 V Load capacitance up to 2500µF	Download		NTC Thermistors Limiting of inrush current Wide resistance range Lead spacing 5 and 7.5mm UL approval
Leaded NTC	P27	Rated resistance at +25 °C: 0.5 … 10 Ω Imax: up to 24 A Operating voltage Vrms: 265 V Load capacitance up to 3500µF	Download		NTC Thermistors Limiting of inrush current Wide resistance range Lead spacing 5 and 7.5mm UL approval

Table - Varistors

Varistors

Product Type	Series	Technical Data	Datasheet	Features Overview
Leaded Varistors	StandarD Series	S14: Imax 8/20 µs: up to 4.5 kA S20: Imax 8/20 µs: up to 6.5 kA Operating Voltage Vrms: 11 … 1100 V	Download	Leaded varistors 14 to 20 mm High surge current ratings High energy ratings (2 ms#) up to 410 J Wide operating voltage range 11 … 1100 VRMS No derating up to 85 °C ambient temperature
Leaded Varistors	AdvanceD Series	S14: Imax 8/20 µs: up to 5 kA S20: Imax 8/20 µs: up to 10 kA Operating Voltage Vrms: 130 … 680 V	Download	Leaded varistors 14 to 20 mm High surge current ratings High energy ratings (2 ms#) up to 440 J Wide operating voltage range 130 … 680 VRMS
Leaded Varistors	AdvanceD-MP, S14 Series	S14: Imax 8/20 µs: up to 6 kA Operating Voltage Vrms: 130 … 680 V	Download	Leaded varistors 14 mm Wide operating voltage range 130 ... 680 VRMS All types duty cycle @ 6 kV/ 3 kA = >10 pulses, according to IEC 60950-1 Annex Q; IEC 61051-2 All types Inom @ 3 kA = >15 impulses according to UL 1449, 3rd Edition surge current generator (8/20 μs), Type 2 listed Multiple pulse handling capability
Leaded Varistors	SuperioR-MP, S20 Series	S20: Imax 8/20 µs: up to 12 kA Operating Voltage Vrms: 130 … 680 V	Download	Wide operating voltage range 130 ... 680 VRMS All types duty cycle @ 6 kV/ 3 kA = >10 pulses, according to IEC 60950-1 Annex Q; IEC 61051-2 All types Inom @ 5 kA = >15 impulses according to UL 1449, 3rd Edition surge current generator (8/20 μs), Type 2 listed Multiple pulse handling capability
Housed Varistors	ThermoFuse T14K130…420E2	T14: Imax 8/20 µs: 6 kA Operating Voltage Vrms: 130 … 420 V	Download	UL approval to UL1449 3rd edition (File number E321126) Approval pending to IEC61051 and VDE High peak surge current rating of 6 kA at single 8/20us impulse Meet thermal stability according to section 8.3.5.2 of IEC 61643-11 Failure safe for abnormal over voltage (see “Reliability Data Electrical, Abnormal over voltage”)
Housed Varistors	ThermoFuse T20K460…1000	T20: Imax 8/20 µs: up to 8 kA Operating Voltage Vrms: 460 … 1100 V	Download	Three-leaded version for failure indication UL approval to UL1449 3rd edition (File number E321126) Approval pending to IEC61051 and VDE Meet thermal stability according to section 8.3.5.2 of IEC 61643-11 Failure safe for abnormal over voltage (see “Reliability Data Electrical, Abnormal over voltage”)
Housed Varistors	ThermoFuse T20K130…680E2	T20: Imax 8/20 µs: 10 kA Operating Voltage Vrms: 130 … 680 V	Download	Three-leaded version for failure indication UL approval to UL1449 3rd edition (File number E321126) VDE certification (certificate number 40031102） IEC61051-2-2 certification High peak surge current rating of 10 kA at single 8/20us impulse Meet thermal stability according to section 8.3.5.2 of IEC 61643-11 Failure safe for abnormal over voltage (see “Reliability Data Electrical, Abnormal over voltage”)

Table - Arresters

Arresters

Product Type	Series	Technical Data	Datasheet	Features Overview
Arresters	LN30…	DC spark-over voltage: > 600VDC Front-of-wave spark over-voltage at 1.2/50 µs, 6kV: 2500 V Impulse current (10/350 µs): 20 kA	Download	High self-extinguishing capability High follow current limitation capability Stable performance over life High insulation resistance
Arresters	H3…	DC spark-over voltage: >600VDC & 800VDC Front-of-wave spark over-voltage at 1.2/50 µs, 6kV: 1500 V Impulse current (10/350 µs): 100 kA	Download	Suitable for direct strikes Very fast response time Stable performance over life High insulation resistance
Arresters	L1...	DC spark-over voltage: > 600VDC Front-of-wave spark over-voltage at 1.2/50 µs, 6kV: 1500 V Impulse current (10/350 µs): 100 kA Size: Ø 30 x 12 mm	Download	High Impulse current (10/350 µs) Temporary overvoltage withstand capability IEC 61643-11
Arresters	V1…	DC spark-over voltage: > 600VDC Front-of-wave spark over-voltage at 1.2/50 µs, 6kV: 1500 V Impulse current (10/350 µs): 12 kA Size: Ø 11.8 x 17.4 mm	Download	Maximum current rating Fast response time Very low capacitance High insulation resistance
Arresters	A8…	DC spark-over voltage: 75 … 600VDC Nom. Discharge current: 20 kA Size: Ø 8 x 6 mm	Download	2-electrode SMD & Leaded version Very high discharge current High insulation resistance
Arresters	M5…	DC spark-over voltage: 75 … 600VDC Nom. Discharge current: 5 kA Size: Ø 5 x 5 mm	Download	2-electrode SMD & Leaded version Low capacitance High insulation resistance
Arresters	EF…	DC breakdown voltage: 270 … 3200 V Max. Discharge current: 10kA Size: Ø 8 x 6 mm	Download	High insulation resistance Temporary overvoltage withstand capability IEC 61643-11 UL 1449 (E319264)
Arresters	A7…	DC spark-over voltage: 800 … 3500VDC Nom. Discharge current: 10 kA Size: Ø 8 x 8 mm	Download	Standard size Fast response time Stable performance over life Low capacitance High insulation resistance
Arresters	EHV…	Dc spark-over voltage: 2500 … 4500 V Max. Discharge current 8/20 µs: 5 kA Size: Ø 6 x 7 mm	Download	High voltage surge arrester High insulation resistance Very small size

TDK Logo HTML

Ask an Expert Grid Box Dark

Engineering Services

Ask an expert

Have a question? Our regional technical specialists are on hand to help

GET IN TOUCH

Grid Box Dark - Inverters and drives brochure

Inverters and drives brochure

Avnet Abacus offers a comprehensive portfolio of EPCOS and TDK branded products for state-of-the-art inverter and drive design

Download

Right Rail Card Dark - Input Filtering

Input filtering

EMC input filter requirements include limitation of conducted and radiated emissions, immunity to transients and surges on the power lines, and immunity to levels of external electromagnetic radiation and electrostatic discharge.

Learn More

Right Rail Card Dark - Rectification

Rectification

Each AC input phase is rectified by 3 diodes (top diode in the positive direction and the low side diode of the other two phases) so that the peak of the negative half cycle appears positive.

Learn More

Right Rail Card Dark - DC-Link

DC-Link

A DC-link capacitor is fitted at this point to provide a low impedance path for high frequency switching currents and to provide energy storage.

Learn More

Right Rail Card Dark - Conversion

Conversion

At the conversion stage of a variable frequency drive, the DC voltage is converted into an AC voltage at a given but variable voltage and frequency to drive the motor.

Learn More

Right Rail Card Dark - Thermal Management

Thermal management

In a drive, the heatsink’s role is to cool the semiconductors and DC link capacitors and prevent overheating.

Learn More

Right Rail Card Dark - Driver and Controller

Driver and controller

The Control and Feedback stages analyse signals from the current sensors mounted at the motor output, measure the temperature of sensors and control the driver for the conversion semiconductors.

Learn More

Right Rail Card Dark - Output Filtering

Output filtering

The output stage of a drive takes a three-phase AC output with variable frequency and amplitude for fine speed and torque control and filters it to minimise EMI and provide reliable operation of the power converter and load.

Learn More

Complementary Content

${loading}