Datasheet R1178NC14x Datasheet (Westcode Semiconductors)

Date:- 01 August 2012

2

Data Sheet Issue:- 2

Distributed Gate Thyristor

Type R1178NC14x

Absolute Maximum Ratings

V

DRM

V

DSM

V

RRM

V

RSM

VOLTAGE RATINGS

Repetitive peak off-state voltage, (note 1) 1400 V
Non-repetitive peak off-state voltage, (note 1) 1400 V
Repetitive peak reverse voltage, (note 1) 1400 V
Non-repetitive peak reverse voltage, (note 1) 1500 V

OTHER RATINGS

I

Mean on-state current, T

T(AV)

I

Mean on-state current. T

T(AV)

I

Mean on-state current. T

T(AV)

I

Nominal RMS on-state current, T

T(RMS)

I

D.C. on-state current, T

T(d.c.)

I

Peak non-repetitive surge tp=10ms, VRM=0.6V

TSM

I

TSM2

I2t I2t capacity for fusing tp=10ms, VRM=0.6V
I2t

(di/dt)cr

V

RGM

P

G(AV)

PGM Peak forward gate power 30 W
VGD Non-trigger gate voltage, (Note 7) 0.25 V
THS Operating temperature range -40 to +125 °C
T

stg

Notes:-

1) De-rating factor of 0.13% per °C is applicable for T

2) Double side cooled, single phase; 50Hz, 180° half-sinewave.

3) Single side cooled, single phase; 50Hz, 180° half-sinewave.

4) Double side cooled.

5) Half-sinewave, 125°C T

6) V

7) Rated V

Peak non-repetitive surge tp=10ms, VRM≤10V, (note 5)

2

I

t capacity for fusing tp=10ms, VRM≤10V, (note 5)
Maximum rate of rise of on-state current (repetitive), (Note 6) 1000 A/µs
Maximum rate of rise of on-state current (non-repetitive), (Note 6) 1500 A/µs

Peak reverse gate voltage 5 V

Mean forward gate power 2 W

Storage temperature range -40 to +150 °C

initial.

=67% V

D

, IFG=2A, tr≤0.5µs, T

DRM

.

DRM

j

=55°C, (note 2) 1178 A

sink

=85°C, (note 2) 767 A

sink

=85°C, (note 3) 433 A

sink

=25°C, (note 2) 2395 A

sink

=25°C, (note 4) 1916 A

sink

, (note 5) 17 kA

RRM

, (note 5) 1.45×106 A

RRM

below 25°C.

j

=125°C.

case

MAXIMUM

LIMITS

MAXIMUM

LIMITS

18.7 kA

6

1.75×10

A

UNITS

UNITS

s

2

s

Data Sheet. Type R1178NC14x Issue 2 Page 1 of 12 August 2012

Distributed gate thyristor type R1178NC14x

r

r

r

r

r

r

Characteristics

PARAMETER MIN. TYP. MAX. TEST CONDITIONS (Note 1) UNITS

VTM Maximum peak on-state voltage - - 2.2 ITM=2000A V
VT0

rT
(dv/dt)cr

I

DRM

I

RRM

VGT Gate trigger voltage - - 3.0 Tj=25°C V
IGT Gate trigger current - - 300 Tj=25°C VD=10V, IT=2A mA
IH Holding current - - 1000 Tj=25°C mA
t

gd

t

gt

Q

rr

Q

ra

Irm Reverse recovery current - - 130 A
t

rr

tq Turn-off time (note 2)

R

thJK

F Mounting force 19 - 26 kN
Wt Weight - 510 - g

Threshold voltage - - 1.6 V
Slope resistance - - 0.3
Critical rate of rise of off-state

voltage
Peak off-state current - - 150 Rated V
Peak reverse current - - 150 Rated V

Gate controlled turn-on delay time - 0.4 1.2

Turn-on time - 1.0 3.0

200 - - V

=80% V

D

=67%V

V

D

=2A, tr≤0.5µs, T

I

FG

DRM

DRM

RRM

DRM

, ITM=2000A, di/dt=60A/µs,

=25°C

case

Recovered charge - - 350

Recovered charge, 50% Chord - 170 190 µC

=1000A, tp=1000µs, di/dt=60A/µs,

I

TM

V

=50V

r

Reverse recovery time, 50% chord - - 3.7 µs

I

=1000A, tp=1000µs, di/dt=60A/µs,

TM

V

=50V, V

I

=1000A, tp=1000µs, di/dt=60A/µs,

TM

V

=50V, V

=80%V

d

=80%V

d

DRM

DRM

, dV

/dt=20V/µs

d

, dV

/dt=200V/µs

d

Thermal resistance, junction to

heatsink

- - 35

25 - 35

- - 0.024 Double side cooled

- - 0.048 Single side cooled

mΩ

V/µs

mA

µs

µC

µs

K/W

Notes:-

1) Unless otherwise indicated T

2)

The required tq (specified with dVdr/dt=200V/µs) is represented by ‘x’ in the device part number. See ordering information for
details of t

codes.

q

Data Sheet. Type R1178NC14x Issue 2 Page 2 of 12 August 2012

=125°C.

j

Distributed gate thyristor type R1178NC14x

Notes on Ratings and Characteristics

1.0 Voltage Grade Table

Voltage Grade

V

DRM VDSM VRRM

V

V

RSM

V

VD VR

DC V

14 1400 1400 930

2.0 Extension of Voltage Grades
This report is applicable to other and higher voltage grades when supply has been agreed by

Sales/Production.

3.0 Extension of Turn-off Time
This Report is applicable to other t

/re-applied dv/dt combinations when supply has been agreed by

q

Sales/Production.

4.0 Repetitive dv/dt
Higher dv/dt selections are available up to 1000V/µs on request.

5.0 De-rating Factor
A blocking voltage de-rating factor of 0.13%/°C is applicable to this device for T

below 25°C.

j

6.0 Rate of rise of on-state current
The maximum un-primed rate of rise of on-state current must not exceed 1500A/µs at any time during

turn-on on a non-repetitive basis. For repetitive performance, the on-state rate of rise of current must not
exceed 1000A/µs at any time during turn-on. Note that these values of rate of rise of current apply to the
total device current including that from any local snubber network.

7.0 Square wave ratings
These ratings are given for load component rate of rise of forward current of 100 and 500A/µs.

8.0 Duty cycle lines
The 100% duty cycle is represented on all the ratings by a straight line. Other duties can be included as

parallel to the first.

9.0 Maximum Operating Frequency
The maximum operating frequency is set by the on-state duty, the time required for the thyristor to turn off

(t

) and for the off-state voltage to reach full value (tv), i.e.

q

f

max

=

1

vqpulse ttt

++

Data Sheet. Type R1178NC14x Issue 2 Page 3 of 12 August 2012

Distributed gate thyristor type R1178NC14x

(

)

⋅−=

(

)

⋅+⋅

)

10.0 On-State Energy per Pulse Characteristics
These curves enable rapid estimation of device dissipation to be obtained for conditions not covered by

the frequency ratings.
Let E

Let R
and T

Then the average dissipation will be:

be the Energy per pulse for a given current and pulse width, in joules

p

be the steady-state d.c. thermal resistance (junction to sink)

th(J-Hs)

be the heat sink temperature.

SINK

⋅= 125

11.0 Reverse recovery ratings
is based on 50% Irm chord as shown in Fig. 1 below.

(i) Q

ra

(ii) Q

is based on a 150µs integration time.

rr

i.e.

=

.)(max

150

RWT and fEW

()

−

Fig. 1

s

µ

dtiQ

.

rrrr

∫

0

HsJthAVSINKPAV

1

t

(iii)

12.0 Reverse Recovery Loss

12.1 Determination by Measurement

From waveforms of recovery current obtained from a high frequency shunt (see Note 1, Page 5) and
reverse voltage present during recovery, an instantaneous reverse recovery loss waveform must be
constructed. Let the area under this waveform be E joules per pulse. A new heat sink temperature can
then be evaluated from the following:

where k = 0.227 (°C/W)/s

E = Area under reverse loss waveform per pulse in joules (W.s)

f = Rated frequency (in Hz) at the original heat sink temperature

R

Data Sheet. Type R1178NC14x Issue 2 Page 4 of 12 August 2012

= D.C. thermal resistance (°C/W)

th(J-Hs

FactorK =

−=

)()(

2

t

RfkETT

()

−

HsJthoriginalSINKnewSINK

Distributed gate thyristor type R1178NC14x

⋅

(

⋅

⋅

r

The total dissipation is now given by:

(original)(TOT)

12.2 Determination without Measurement

In circumstances where it is not possible to measure voltage and current conditions, or for design
purposes, the additional losses E in joules may be estimated as follows.

Let E be the value of energy per reverse cycle in joules (curves in Figure 9).
Let f be the operating frequency in Hz

() ( )

Where T
T

SINK (original)

A suitable R-C snubber network is connected across the thyristor to restrict the transient reverse voltage
to a peak value (V
67% of Grade, the reverse loss may be approximated by a pro rata adjustment of the maximum value
obtained from the curves.

NOTE 1- Reverse Recovery Loss by Measurement
This thyristor has a low reverse recovered charge and peak reverse recovery current. When measuring

the charge care must be taken to ensure that:

(a) a.c. coupled devices such as current transformers are not affected by prior passage of high

amplitude forward current.

(b) A suitable, polarised, clipping circuit must be connected to the input of the measuring oscilloscope

to avoid overloading the internal amplifiers by the relatively high amplitude forward current signal

(c) Measurement of reverse recovery waveform should be carried out with an appropriate critically

damped snubber, connected across diode anode to cathode. The formula used for the calculation
of this snubber is shown below:

SINK (new)

is the required maximum heat sink temperature and

is the heat sink temperature given with the frequency ratings.

) of 67% of the maximum grade. If a different grade is being used or Vrm is other than

rm

+=

−=

fEWW

)

fRETT

thoriginalSINKnewSINK

2

R

Where: V
C
R = Snubber resistance

13.0 Gate Drive

The recommended pulse gate drive is 20V, 10Ω with a short-circuit current rise time of not more than

0.5µs. This gate drive must be applied when using the full di/dt capability of the device.

The duration of pulse may need to be configured with respect to the application but should be no shorter
than 20µs, otherwise an increase in pulse current could be needed to supply the necessary charge to
trigger the device.

Data Sheet. Type R1178NC14x Issue 2 Page 5 of 12 August 2012

V

⋅= 4

S

r

di

C

⋅

dt

S

= Commutating source voltage

= Snubber capacitance

Distributed gate thyristor type R1178NC14x

(

p

p

14.0 Computer Modelling Parameters

14.1 Calculating V

The on-state characteristic I
(i) the well established V
(ii) a set of constants A, B, C, D, forming the coefficients of the representative equation for V

terms of I

using ABCD Coefficients

T

vs. VT, on page 7 is represented in two ways;

T

and rT tangent used for rating purposes and

T0

given below:

T

in

T

)

The constants, derived by curve fitting software, are given in this report for hot characteristics where
possible. The resulting values for V
is limited to that plotted.

14.2 D.C. Thermal Impedance Calculation

Where p = 1 to n, n is the number of terms in the series.

t = Duration of heating pulse in seconds.

= Thermal resistance at time t.

r

t

r

= Amplitude of pth term.

= Time Constant of r

τ

Term 1 2 3 4 5

rp

τ

p

Term 1 2 3 4 5 6

rp

τ

p

0.01249139 6.316833×10-3 1.850855×10-3 1.922045×10-3 6.135330×10-4

0.8840810 0.1215195 0.03400152 6.742908×10-3 1.326292×10-3

0.02919832

6.298105 3.286174 0.5359179 0.1186897 0.02404574 3.379476×10

4.863568×10

agree with the true device characteristic over a current range, which

T

125°C Coefficients

A 0.62329615
B 0.2341749
C 4.506305×10-4
D -0.02469732

−

t

⎞

τ

p

⎟

err

−⋅=
⎟

⎠

6.818034×10

3

3

=

np

∑

pt

=

p

1

term.

th

D.C. Double Side Cooled

D.C. Single Side Cooled

-

3.744798×10

⎛
⎜

1

⎜
⎝

-3

IDICIBAV ⋅+⋅+⋅+= ln

TTTT

-

2.183558×10

-

3

1.848294×10

-3

-3

Data Sheet. Type R1178NC14x Issue 2 Page 6 of 12 August 2012

Distributed gate thyristor type R1178NC14x

Curves

Figure 1 - On-state characteristics of Limit device Figure 2 - Transient thermal impedance

(A)

T

10000

Tj = 125°C

0.1

SSC 0.048K/W

DSC 0.024K/W

0.01

(K/W)

(th)t

1000

Instantaneous on-state current - I

R1178NS12x-14x

R1178NC14x

Issue 1

100

012345

Instantaneous on-state voltage - V

Issue 2

(V)

T

Figure 3 - Gate characteristics - Trigger limits

6

R1178NS12x-14x

R1178NC14x

Issue 2

Issue 1

Tj=25°C

5

Max VG dc

GT

(V)

GT

4

IGT, V

0.001

Transient Thermal Impedance - Z

0.0001

R1178NC14x

R1178NS12x-14x

Issue 2

0.00001

0.0001 0.001 0.01 0.1 1 10 100

Time (s)

Issue 1

Figure 4 - Gate characteristics - Power curves

20

R1178NS12x-14x

R1178NC14x

Issue 1

Issue 2

Tj=25°C

18

16

14

(V)

GT

12

Max VG dc

3

10

8

Gate Trigger Voltage - V

2

25°C

125°C

1

IGD, V

GD

0

0 0.25 0.5 0.75 1

Gate Trigger Current - I

Data Sheet. Type R1178NC14x Issue 2 Page 7 of 12 August 2012

-10°C

GT

-40°C

Min VG dc

(A)

Gate Trigger Voltage - V

6

4

PG 2W dc

2

0

0246810

Gate Trigger Current - I

PG Max 30W dc

Min VG dc

(A)

GT

Distributed gate thyristor type R1178NC14x

r

r

2000A

Figure 6 - Recovered charge, Qra (50% chord)

r

1000

1000A

500A

250A

(µC)

ra

2000A
1000A

500A
250A

Figure 5 - Total recovered charge, Q

1000

(µC)

rr

100

Total recovered charge - Q

Tj = 125°C

R1178NS12x-14x

R1178NC14x

Issue 2

Issue 1

10

10 100 1000

Commutation rate - di/dt (A/µs)

Figure 7 - Peak reverse recovery current, Irm

1000

2000A
1000A
500A
250A

(A)

rm

100

Recovered charge - Q

10

10 100 1000

Commutation rate - di/dt (A/µs)

Figure 8 - Maximum recovery time, t

10

(µs)

rr

Tj = 125°C

R1178NS12x-14x

R1178NC14x

Issue 1

Issue 2

(50% chord)

r

100

Reverse recovery current - I

R1178NS12x-14x

R1178NC14x

10

10 100 1000

Commutation rate - di/dt (A/µs)

Tj = 125°C

Issue 1

Issue 2

Reverse recovery time - t

1

10 100 1000

Commutation rate - di/dt (A/µs)

2000A
1000A

500A

250A

Tj = 125°C

R1178NS12x-14x

R1178NC14x

Issue 1

Issue 2

Data Sheet. Type R1178NC14x Issue 2 Page 8 of 12 August 2012

Distributed gate thyristor type R1178NC14x

Figure 9 - Reverse recovery energy per pulse Figure 10 - Sine wave energy per pulse

1

2000A

1.00E+02

1.00E+01

R1178NS12x-14x

R1178NC14x

Issue 2

Issue 1

Tj=125°C

(J)

r

1000A

500A

0.1

250A

Energy per pulse - E

Vrm = 67% V

R1178NS12x-14x

R1178NC14x

Issue 2

0.01
10 100 1000

Commutation rate - di/dt (A/µs)

Figure 11 - Sine wave frequency ratings

1.00E+05

500A

100% Duty Cycle

1kA

1.00E+04

R1178NC14x

R1178NS12x-14x

Issue 2

Issue 1

Snubber:

0.25µF,3
Tj = 125°C

RRM

Issue 1

THs=55°C

5kA

1.00E+00

3kA

Energy per pulse (J)

1.00E-01

Ω

1.00E-02

Figure 12 - Sine wave frequency ratings

1.00E+05

1.00E+04

2kA

1kA

500A

250A

1.00E-05 1.00E-04 1.00E-03 1.00E-02

Pulse width (s)

500A

1kA

100% Duty Cycle

2kA

1.00E+03

3kA

1.00E+03

2kA

3kA

Frequency (Hz)

5kA

1.00E+02

1.00E+01

1.00E-05 1.00E-04 1.00E-03 1.00E-02

Pulse Width (s)

Frequency (Hz)

1.00E+02
5kA

1.00E+01

THs=85°C
R1178NS12x-14x

R1178NC14x

Issue 1

1.00E+00

Issue 2

1.00E-05 1.00E-04 1.00E-03 1.00E-02

Pulse width (s)

Data Sheet. Type R1178NC14x Issue 2 Page 9 of 12 August 2012

Distributed gate thyristor type R1178NC14x

Figure 13 - Square wave frequency ratings Figure 14 - Square wave frequency ratings

1.00E+05

500A

1.00E+05

1kA

1.00E+04

2kA

3kA

1.00E+03
5kA

Frequency (Hz)

1.00E+02

1.00E+01

THs=55°C
di/dt=100A/µs

R1178NS12x-14x

R1178NC14x

Issue 1

1.00E+00

Issue 2

1.00E-05 1.00E-04 1.00E-03 1.00E-02

100% Duty Cycle

Pulse width (s)

1.00E+04

1.00E+03

Frequency (Hz)

1.00E+02

1.00E+01

1.00E+00

500A

1kA

2kA

3kA

5kA

THs=55°C
di/dt=500A/µs

R1178NS12x-14x

R1178NC14x

Issue 2

Issue 1

1.00E-05 1.00E-04 1.00E-03 1.00E-02

100% Duty Cycle

Pulse width (s)

Figure 15 - Square wave frequency ratings Figure 16 - Square wave frequency ratings

1.00E+05

1.00E+05

500A

1.00E+04

1.00E+03

Frequency (Hz)

1.00E+02

1.00E+01

1kA

2kA

3kA

5kA

THs=85°C
di/dt=100A/µs

R1178NS12x-14x

R1178NC14x

Issue 2

Issue 1

1.00E-05 1.00E-04 1.00E-03 1.00E-02

100% Duty Cycle

Pulse width (s)

250A

1.00E+04

1.00E+03

Frequency (Hz)

1.00E+02

1.00E+01

1.00E+00

500A

1kA

2kA

3kA

5kA

THs=85°C
di/dt=500A/µs

R1178NS12x-14x

R1178NC14x

Issue 2

Issue 1

1.00E-05 1.00E-04 1.00E-03 1.00E-02

100% Duty Cycle

Pulse width (s)

Data Sheet. Type R1178NC14x Issue 2 Page 10 of 12 August 2012

Distributed gate thyristor type R1178NC14x

Figure 17 - Square wave energy per pulse Figure 18 - Square wave energy per pulse

1.00E+03

R1178NS12x-14x

R1178NC14x

Issue 2

Issue 1
di/dt=100A/µs
Tj=125°C

1.00E+03
R1178NS12x-14x

R1178NC14x

Issue 2

Issue 1
di/dt=500A/µs
Tj=125°C

1.00E+02

1.00E+01

5kA

3kA

1.00E+00

Energy per pulse (J)

1.00E-01

250A

1.00E-02

2kA

1kA

500A

1.00E-05 1.00E-04 1.00E-03 1.00E-02

Pulse width (s)

Figure 19 - Maximum surge and I2t Ratings

Gate may temporarily lose control of conduction angle

100000

1.00E+02

5kA
3kA

1.00E+01

2kA

1.00E+00

Energy per pulse (J)

1.00E-01

1.00E-02

1.00E-05 1.00E-04 1.00E-03 1.00E-02

Pulse width (s)

1kA
500A
250A

1.00E+07

(A)

TSM

10000

Total peak half sine surge current - I

1000

135101 510 50100

Duration of surge (ms) Duration of surge (cycles @ 50Hz)

RRM

: V

RRM

: 60% V

≤

≤

10V

RRM

10V

RRM

I2t: V

I2t: 60% V

I

TSM

I

TSM

Tj (initial) = 125°C

R1178NC14x

R1178NS12x-14x

Issue 2

Issue 1

1.00E+06

1.00E+05

s)

2

t (A

2

Maximum I

Data Sheet. Type R1178NC14x Issue 2 Page 11 of 12 August 2012

Distributed gate thyristor type R1178NC14x

Outline Drawing & Ordering Information

101A223

ORDERING INFORMATION (Please quote 10 digit code as below)

R1178 NC

Fixed

Type Code

Typical order code: R1178NC14F – 1400V V

The information contained herein is confidential and is protected by Copyright. The information may not be used or
disclosed except with the written permission of and in the manner permitted by the proprietors IXYS UK Westcode Ltd.

In the interest of product improvement, IXYS UK Westcode Ltd reserves the right to change specifications at any time
without prior notice.

Devices with a suffix code (2-letter or letter/digit/letter combination) added to their generic code are not necessarily subject
to the conditions and limits contained in this report.

Fixed

Off-state Voltage Code

Outline Code

, 30µs tq, 27.7mm clamp height capsule.

DRM

♦ ♦ ♦

V

/100

DRM

14

t

Code (@ 200V/µs)

q

E=25µs, F=30µs,

G=35µs

© IXYS UK Westcode Ltd.

Data Sheet. Type R1178NC14x Issue 2 Page 12 of 12 August 2012