C4

HV switch, variable on-time, low on-resistance, SiC & Trench FET  

● Extremely low on-resistance by SILICON CARBIDE FET (SiC) or Trench FET technology ● Versatile HV switch with true relay character ● On-time controllable by TTL signal  ● Low dynamic switching losses and extremely low turn-on losses ● Ideal for industrial power applications ● Robust regarding overload and voltage reversal ● Excellent dv/dt immunity against HV transients

Application Note I:  BEHLKE solid-state switches have extreme rise and fall times. If your application does not require the full switching speed we suggest you the use of the speed limiting option S-TT (rise & fall times slower by approx. 50%) in combination with the input low pass filter option LP. The speed limiting options help to minimize the high frequency difficulties typical for fast high voltage pulse circuits  (e.g. self oscillating, self re-triggering, ringing etc.) and simplify the EMC design in general.

Application Note II:  Fast solid-state switches are relatively sensitive for reverse currents from unclamped inductive load or from excessive wiring inductance. Reverse currents may turn-on the slow intrinsic (parasitic) FET diodes in an undefined way and can lead to a catastrophic switch failure especially during the turn-off phase in combination with high turn-off currents. Therefore it is recommended to combine FET switches always with a fast free-wheeling diode network (fast serial blocking diode + parallel fast free-wheeling diode), when inductive load or highly inductive wiring is connected to the switch. This protective diode network can be installed externally by means of single diodes of the series BEHLKE FDA. It can also be integrated into the switching module as option I-FWDN. Please read the general instructions carefully.

Export Restrictions: Fast solid-state switches with a maximum peak current equal or higher than 500 Amperes are export restricted according to the United States law as well as the German law (dual use regulation). These goods must not be exported to third countries without a valid export permit of the US or German export authorities. An enduser statement may be required. Please consult BEHLKE.

Product Code: The model number contains coded information about voltage, current and turn-on behavior.  The first digits stand for the voltage in kV, the last digit before the dash indicates the turn-on behavior (0 = fixed on-time, 1 = variable on-time). The digits after the dash indicate the current  in Amperes x10. Special features are coded by the letters after a second dash. Example HTS 61-15-SiC:  HTS = HV Transistor Switch, 6 = 6 kV,  1 = variable on-time, 120 = 1200 Ampere, SiC = Silicon Carbide  (or B = Low On-Resistance Trench FET)  

Model                       [sorted by voltage]

Description / Comment
● Preferred stock type ○ Limited stock  X Not for new development

Options (1)

B-CON

Beginner's Configuration: The standard switch is equipped with various options to simplify first time experiments for users which are inexperienced with high voltage and high frequency circuit design. The beginner's configuration includes option FH and PT-HV for easy wiring and attachment without printed circuit boards, as well as option LS-C, LP and S-TT for an uncritical EMC behavior. Inexperienced users should also consider the combination with option I-PC or PC to avoid possible difficulties from the high voltage wiring and / or high frequency noise behavior.  (2)

HFS

High Frequency Switching: External supply of auxiliary driver voltage (50-350 VDC according to type). Necessary if the specified “Maximum Operating Frequency” shall be exceeded. (2)

LP

Low Pass: Low pass filter at the control input. Propagation delay time will be increased by ~50 ns. Jitter + 500 ps.  Improved noise immunity and  less critical wiring in high speed applications. (3)

FAST

Faster Switching Times (-30 to -40%) due to increased driver power. Minimum on-times will be reduced by about 40 to 50%. For selected high current switches only. Please consult factory. (2)  

S-ON

Soft Turn-On:  “Turn-On Rise Time” increased by ~20%. Simplified EMC design and less critical wiring if the shortest possible edge steepness is not required. (3)

S-OFF

Soft Turn-Off: “Turn-Off Rise Time” increased by ~20%. Simplified EMC design and less critical wiring if the shortest possible edge steepness is not required. (3)

S-TT

Soft Transition Time: ”Turn-On Rise Time” & “Turn-Off Rise Time” increased by ~20%. Simplified EMC design and less critical wiring if the shortest possible edge steepness is not required. (3)

MIN-ON

Minimum On-Time: Individually increased Minimum On-Time to ensure a minimum on duration indepently of control signal.  For safety relevant circuits.

MIN-OFF

Minimum Off-Time: Individually increased Minimum Off-Time to ensure a minimum off duration indepently of control signal. For safety relevant circuits.

ST

Stage Tapping:  Connectors at the individual stages of stack in order to utilize single power semiconductors. To achieve fast rise times also at very low operating voltages (<0.01xVo).

LNC

Low Natural Capacitance: C_N reduced by approximately 30%. To minimize capacitive power losses in applications with high switching frequency and high switching voltage (Pc= V² x C x f).

LL

Low Leakage Current: Off-state current reduced to less than 10%  of the specified value. Not available in connection with the cooling fin options and for switches of the UF series.

LN

Low Noise:  Internal power driver modified for zero noise emission for a specific period of time. Relevant in conjunction with sensitive detector amplifiers (e.g. SEV/MCP applications) only.(2)

ISO-25

25 kV Isolation:  Isolation Voltage increased to  25 kVDC. Housing dimensions may change for some models.

ISO-40

40 kV Isolation:  Isolation Voltage increased to  40 kVDC. Housing dimensions may change for some models.  Only in connection with option PT-HV.

ISO-80

80 kV Isolation:  Isolation Voltage increased to  80 kVDC. Housing dimensions may change for some models.  Only in connection with option PT-HV.

ISO-120

120 kV Isolation: Isolation Voltage increased to 120 kVDC. Housing dimensions may change for some models. Only in connection with option PT-HV.

PL

Passive Lock: Special inhibit function for two single switches in fast push-pull circuits. The input of the passive switch will be locked by the activated switch to avoid turn-on by noise.

I-PC

Integrated Part Components: Integration of small part components according to customer’s specifications (e.g. buffer capacitors, snubbers, damping resistors, diodes, opto couplers). (2)

I-FWD

Integrated Free-Wheeling Diode:  Built-in parallel diode with short recovery time. In connection with inductive load only.

I-FWDN

Integrated Free-Wheeling Diode Network: Built-in parallel diode plus serial blocking diode  with short recovery time. In connection with inductive load only.

SPT-C

Shielded Pigtail for Control Connection: Cable (l=300mm, Z=100Ω) with LEMO plug+socket and 100Ω termination. Improved noise immunity in case of long distance to driver circuits. (3)

PT-C

Pigtail for Control Connection: Flexible leads (l=75 mm) with PCB connector. This option is only relevant for switching modules with pins. Recommended for modules with options CF & GCF.

PIN-C

Pins for Control Connection: Gold plated pins for printed circuit board designs (special sockets available). This option is only relevant for switching modules which have pigtails as standard.

PT-HV

Pigtails for HV Connection: Flexible leads with cable lugs. For increased creepage. PT-HV is standard for all types with >25 kV switching voltage. Not recommended in extremely fast circuits.

ST-HV

Screw Terminals for HV Connection: Threaded inserts at the bottom of module (if not standard). For PCB design. Operation above 25 kV requires liquid insulation (Galden®/Oil) or potting.

SEP-C

Separated Control Unit. Control unit with LED indicators in a separate housing (dim. 79x38x17 mm). Linkage cable (<1m) with plug. Control unit with soldering pins or pigtails.

UL94

Flame Retardant Casting Resin: Casting resin according to UL-94-VO. Minimum order quantity required. (2)

TH

Tubular Housing: Tubular instead of rectangular housing. Adaption to specific ambient conditions or in case  of difficult assembly situations. (2)

FC

Flat Case: Height of standard plastic housings reduced to 19 mm or less. Not in combination with cooling options CF, GCF and DLC.

ITC

Increased Thermal Conductivity: Special moulding process to increase the thermal conductivity of the module. Pd(max) will be increased by approx. 20-30%. (2)

C-DR

Cooling for Driver: Extra cooling for the driver and control electronics. Recommended in combination with option HFS at higher switching frequencies. (2)

GCF

Grounded Cooling Flange: Nickel-plated copper flange for medium power. Max. isolation voltage 40kV. Increased coupling capacitance CC.

ILC

Indirect Liquid Cooling:  Liquid cooling for all kind of conductive coolants incl. water. Internal heat exchanger made of ceramics. For medium power dissipation.

DLC

Direct Liquid Cooling: Internal cooling channels arround the power semiconductors. The most efficient cooling for high frequency applications. Non-conductive coolants only.

HI-REL

High Reliability / MIL Versions:  Available on request. (2)

(1) New option code:  Data sheets may differ from this coding system (especially older ones) and do not indicate all possible options as per above table.    (2) Please consult factory for detailed information.
(3) These options are EMC-relevant and are recommended for industrial power applications, difficult noise ambients,  prototype experiments with flying leads and for users without special EMC design experience.