Medium Voltage Thyristors

Medium Voltage Thyristors
Overview
Powerex has expanded its discrete thyristor product line with the addition of new
devices which increase the available blocking voltages to 6500V.
The 6500V SCRs are high voltage, high-current disc package devices with a gate
design that allows the SCR to be reliably operated at high di/dt and dv/dt
conditions in various phase control applications.
Applications
 Soft starters for medium
voltage drives
HVDC
 Static VAR compensators
 Exciter systems
 General purpose drives for
general purpose line voltage
rectifiers (power supplies)
Product Advantages
 Excellent high surge
capability and I2t ratings
 Engineered silicon design
provides significant benefits
for series or parallel
connections with lower
leakage currents and better turn-on speed to achieve
excellent voltage sharing
under demanding operating
conditions for critical capital
equipment.
Features
 Low on-state voltage
 Gate design and large active conduction area results in high current ratings.
 Distributed gate structure provides a high di/dt capability greater than
150 A/µsec and reliability in the field with in-house developed di/dt testing.
 Turn-on gate periphery length not as susceptible to mechanical fatigue caused
by stress as compared to the gate architectures of other manufacturers.
 High dv/dt capability
 Hermetic ceramic package assures optimized thermal impedance to allow
Tj = 125°C. Contact factory for 140°C Tj conditions and for optimized thermal
resistance packaging in slim styles, such as TBSC651402DH (27.2 mm height).
 Alloyed construction employs eutectic aluminum-silicon fusions for proven
greater reliability than floating silicon construction. Floating silicon promotes
thermal runaway and significantly higher total costs due to greater clamping
force requirements.
 Serialized data available by special request to allow user to match devices on
reverse recovery current (IR(rec)) for series connections in pairs, or strings of 3,
4 or 6 SCRs. Automated test sequence employs barcode scanners as shown to
capture parametric data for storage, record retention and report generation.
Bar Code Scanner
 Excellent switching performance over a wide range of
voltage, current, and di/dt
 Alloyed construction and
gate design provide greater
reliability than the design
used by other manufacturers.
Line-up Table
Part Number
Voltage*1 (V)
Current Rating*2 (A)
T8KC―3203DH
T9KC―0603DH
TAKC―1103DH
TBKC―1203DH
TBSC―1402DH
6000-6500
6000-6500
6000-6500
6000-6500
5500-6500
325
600
1100
1250
1400
*1 5500V devices available by special request
*2 Selected devices available with up to 15% increased current ratings.
Please contact GlobalSales @pwrx.com.
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Serving Our Customers Through Expertise, Innovation and Reliability
Series Connection Matching
Why Match SCRs?
SCR Packages
58.4mm Max. Dia.
27.0mm Max.
(Clamped)
T8KC
73.7mm Max. Dia.
27.7mm Max.
(Clamped)
T9KC
Powerex has demonstrated success with multiple customers for matching
SCRs in a series connection. Series connected SCRs are matched to turn
off at the same time with similar reverse recovery current. Series connection
matching, measured by Powerex, avoids Qrr or Irm estimation and
inaccuracy. Matching also allows for the use of similar and more cost
effective snubber components.
Turn-on matching allows SCRs to turn on normally within 1 to 1.5 μsec.
Powerex has in-house full di/dt testing capability to JEDEC standards.
SCR PIV voltage rating requires a 2.25 / 2.5X line-to-line ratio along with
appropriate sized snubbers and a typical motor load.
100.0mm Max. Dia.
34.6mm Max.
(Clamped)
 4160V needs to be ≥ 10.4kV total (or 3 SCRs ≥ ~3500V PIV).
 Must consider input voltage tolerances, such as +10%, (typically more of
a concern with low voltage than medium voltage).
TAKC
110.7mm Max. Dia.
27.2mm
Max.
(Clamped)
TBSC
110.7mm Max. Dia.
38.1mm
Max.
(Clamped)
TBKC
 By using a higher voltage rated device, one can have more margin for
reliability by allowing SCRs to run hotter and trading off blocking voltage
for more current capability or using smaller snubbers and allowing a
higher ring-up voltage.
 Larger SCRs should be considered if there is a short-circuit withstand
requirement.
 Powerex expertise in soft starter applications extends to low voltage
480V/600V/690V line-to-line voltages.
 HV 6500 mating diodes available from Powerex.
 Rupture-proof resistant robust designs available upon request.
Reverse Recovery Waveform and Parameter Definitions
IRR (hot)
diR
dt
IF / IT
Time
trr
0
Qrr
(
IR
T0
®
Lit. Code 256 - Rev. 0 - 4/6/2015
T1
T2
Δ = 2A for 8-size SCRs
4A for 9-size SCRs
5A for B-size SCRs
IR
)
4
T3 T4
For more information:
visit: http://www.pwrx.com/summary/DiscreteThyristor-SCR.aspx
email: [email protected]
phone: 724-925-7272, Option 3 (Applications Engineering Assistance)