Datasheet R3708FC40#, R3708FC45# Datasheet (Westcode Semiconductors)

Date:- 17 Oct, 2007

WESTCODE

Data Sheet Issue:- 4

An IXYS Company

Distributed Gate Asymmetric Thyristor

Type R3708FC40# to R3708FC45#

(Old Type Number: R1386CH40-45)

Absolute Maximum Ratings

VOLTAGE RATINGS

V

DRM

V

DSM

V

RRM

V

RSM

Repetitive peak off-state voltage, (note 1) 4000-4500 V

Non-repetitive peak off-state voltage, (note 1) 4000-4500 V

Repetitive peak reverse voltage, (note 1) 2500-3000 V

Non-repetitive peak reverse voltage, (note 1) 2600-3100 V

OTHER RATINGS

I

T(AV)M

I

T(AV)M

I

T(AV)M

I

T(RMS)

I

T(d.c.)

I

TSM

I

TSM2

I2tI

I2t

(di/dt)crCritical rate of rise of on-state current (note 6)

V

RGM

P

G(AV)

P

GM

T

j op

T

stg

Maximum average on-state current, T

Maximum average on-state current. T

Maximum average on-state current. T

Nominal RMS on-state current, T

D.C. on-state current, T

Peak non-repetitive surge tp=10ms, Vrm=60%V

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

2

t capacity for fusing tp=10ms, Vrm=60%V

I2t capacity for fusing tp=10ms, Vrm≤10V, (note 5)

Peak reverse gate voltage 5 V

Mean forward gate power 4 W

Peak forward gate power 50 W

Operating temperature range -40 to +125 °C

Storage temperature range -40 to +150 °C

=25°C, (note 4) 6275 A

sink

=55°C, (note 2) 3708 A

sink

=85°C, (note 2) 2516 A

sink

=85°C, (note 3) 1498 A

sink

=25°C, (note 2) 7364 A

sink

RRM

, (note 5) 50 A

RRM

, (note 5) 12.50×10

Single Shot 1000

Repetitive (50Hz, 60s) 500

Continuous (50Hz) 250

MAXIMUM

LIMITS

MAXIMUM

LIMITS

55 A

6

15.13×10

6

UNITS

UNITS

A2s

A2s

A/µs

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

=67% V

D

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 1 of 12 October, 2007

, IFG=2A, tr≤0.5µs, T

DRM

initial.

j

case

=125°C.

below 25°C.

j

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Characteristics

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

V

TM

V

T0

r

T

(dv/dt)crCritical rate of rise of off-state voltage 200 - - VD=80% V

I

DRM

I

RRM

V

GT

I

GT

V

GD

I

H

t

gd

t

gt

Q

rr

Q

ra

I

rm

t

rr

t

q

R

thJK

Maximum peak on-state voltage - - 2.1 ITM=4000A V

Threshold voltage - - 1.473 V

Slope resistance - - 0.156

, Linear ramp, Gate o/c

DRM

Peak off-state current - - 200 Rated V

Peak reverse current - - 200 Rated V

Gate trigger voltage - - 3.0 V

T

Gate trigger current - - 600

Gate non-trigger voltage - - 0.25 Rated V

DRM

RRM

=25°C VD=10V, IT=3A

j

DRM

mΩ

V/µs

mA

mA

mA

V

Holding current - - 1000 Tj=25°C mA

Gate controlled turn-on delay time 0.8 2.0

Turn-on time - 2.0 3.0

=67% V

V

D

I

=2A, tr=0.5µs, Tj=25°C

FG

, ITM=4000A, di/dt=60A/µs,

DRM

µs

Recovered charge - 8800 - µC

Recovered charge, 50% Chord - 4000 5100 µC

Reverse recovery current - 400 - A

Reverse recovery time - 20 -

- 250 -

Turn-off time (note 2)

- 300 -

Thermal resistance, junction to heatsink
(note 3)

- - 0.0065 Double side cooled K/W

- - 0.013 Single side cooled K/W

I

=4000A, tp=2000µs, di/dt=60A/µs,

TM

V

=100V

r

ITM=4000A, tp=2000µs, di/dt=60A/µs,
V

=100V, Vdr=67%V

r

, dVdr/dt=20V/µs

DRM

ITM=4000A, tp=2000µs, di/dt=60A/µs,
V

=100V, Vdr=67%V

r

, dVdr/dt=200V/µs

DRM

µs

µs

F Mounting force 81 - 99 kN

W

Weight - 2.8 - kg

t

Notes:-

1) Unless otherwise indicated T

2) The required t

details of t

(specified with dVdr/dt=200V/µs) is represented by a ‘#’ in the device part number. See ordering information for

q

codes.

q

=125°C.

j

3) For other clamp forces, please consult factory

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 2 of 12 October, 2007

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Notes on Ratings and Characteristics

1.0 Voltage Grade Table

Voltage Grade

V

DRM VDSM

V

V

RRM

V

V

RSM

V

V

D

DC V

V

DC V
40 4000 2500 2600 2000 1500
42 4200 2700 2800 2040 1600
44 4400 2900 3000 2080 1700
45 4500 3000 3100 2100 1750

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 tq/re-applied dv/dt combinations when supply has been agreed by
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 Tj below 25°C.

6.0 Snubber Components

R

When selecting snubber components, care must be taken not to use excessively large values of snubber
capacitor or excessively small values of snubber resistor. Such excessive component values may lead to
device damage due to the large resultant values of snubber discharge current. If required, please consult
the factory for assistance.

7.0 Rate of rise of on-state current

The maximum un-primed rate of rise of on-state current must not exceed 1000A/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 500A/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.

8.0 Gate Drive
The nominal requirement for a typical gate drive is illustrated below. An open circuit voltage of at least 30V
is assumed. This gate drive must be applied when using the full di/dt capability of the device.

I

GM

4A/µs

I

G

t

p1

The magnitude of IGM should be between five and ten times IGT, which is shown on page 2. Its duration

) should be 20µs or sufficient to allow the anode current to reach ten times IL, whichever is greater.

(t

p1

Otherwise, an increase in pulse current could be needed to supply the necessary charge to trigger. The
‘back-porch’ current I
magnitude in the order of 1.5 times I

should remain flowing for the same duration as the anode current and have a

G

GT

.

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 3 of 12 October, 2007

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9.0 Frequency Ratings

The curves illustrated in figures 10 to 18 are for guidance only and are superseded by the maximum
ratings shown on page 1.

10.0 Square wave ratings

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

11.0 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.

12.0 Maximum Operating Frequency

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

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

(t

q

f

13.0 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.

Then the average dissipation will be:

14.0 Reverse recovery ratings

(i) Qra is based on 50% Irm chord as shown in Fig. 1

=

vqpulse ttt

++

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

Let E

p

Let R
and T

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

thJK

be the heat sink temperature.

K

.)(max

()

RWTfEW ⋅−=⋅= 125 and

thJKAVKPAV

Fig. 1

max

1

(ii) Qrr is based on a 150µs integration time i.e.

=

(iii)

FactorK =

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 4 of 12 October, 2007

150

s

µ

dtiQ

.

rrrr

∫

0

t

1

t

2

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15.0 Reverse Recovery Loss

15.1 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 Hz at the original heat sink temperature.

= d.c. thermal resistance (°C/W).

R

thJK

The total dissipation is now given by:

(original)(TOT)

15.2 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

K (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.

is the required maximum heat sink temperature and

K (new)

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

()

⋅+=

()

thoriginalKnewK

RfkETT ⋅+⋅−=

thJKoriginalKnewK

fEWW

fRETT

⋅⋅−=

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:

V

=

2

R

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 5 of 12 October, 2007

V

C

r

di

⋅

dt

S

Where:

⋅= 4

r

C

S

R

Commutating source voltage

=

Snubber capacitance

=

Snubber resistance

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16.0 Computer Modelling Parameters

16.1 Calculating VT using ABCD Coefficients

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

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

16.2 D.C. Thermal Impedance Calculation

given below:

T

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

T

and rT tangent used for rating purposes and

T0

()

agree with the true device characteristic over a current range,

T

25°C Coefficients 125°C Coefficients

A 4.678238 A 2.18319094

B -0.6578649 B -0.1424507

C -2.268674×10

D 0.06585253 D 9.906199×10

-4

=

∑

=

p

C 1.179448×10

−

np




1

pt



1



t



τ

p



err

−⋅=




in

T

IDICIBAV ⋅+⋅+⋅+= ln

TTTT

-4

-3

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 rth term.

τ

D.C. Single Side Cooled

Term1234

r

p

τ

p

Term1234

r

p

τ

p

3.424745×10

1.125391 0.1878348 0.02788979 8.430889×10

8.375269×10

8.929845 0.4711304 0.08221244 0.01221961

-3

-3

1.745273×10

D.C. Double Side Cooled

2.518437×10

-3

-3

8.532017×10

1.193758×10

-4

-3

3.457329×10

7.45432×10

-4

-3

-4

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 6 of 12 October, 2007

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Curves

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

(A)

T

10000

R3708FC40#-45#

Issue 4

Tj = 25°CTj = 125°C

(K/W)

(th)t

0.1

0.01

R3708FC40#-45#

Issue 4

SSC 0.013K/W

DSC 0.0065K/W

1000

Instantaneous on-state current - I

100

11.522.53

Instantaneous on-state voltage - V

(V)

T

0.001

Transient Thermal Impedance - Z

0.0001

0.00001

0.0001 0. 001 0.01 0.1 1 1 0 100

Time (s)

Figure 3 - Gate characteristics - Trigger limits Figure 4 - Gate characteristics - Power curves

8

R3708FC40#-45#

Issue 4

Tj=25°C

7

6

Max VG dc

20

R3708FC40#-45#

Tj=25°C

18

16

14

Issue 4

(V)

5

GT

IGT, V

GT

4

3

Gate Trigger Voltage - V

2

1

IGD, V

GD

0

0 0.25 0.5 0.75 1 1.25 1.5

Gate Trigger Current - I

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 7 of 12 October, 2007

125°C

25°C

-10°C

GT

-40°C

Min VG dc

(A)

(V)

GT

12

10

Gate Trigger Voltage - V

Max VG dc

PG Max 50W dc

8

6

4

PG 4W dc

2

0

0246810

Gate Trigger Current - I

Min VG dc

(A)

GT

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Figure 5 - Total recovered charge, Q

100000

(µC)

rr

Total recovered charge - Q

R3708FC40#-45#

Issue 4

Tj = 125°C

10000

1000

10 100 1000

Commutation rate - di/dt (A/µs)

rr

6000A
4000A
2000A

1000A

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

, 50% chord (µC)

ra

10000

R3708FC40#-45#

Issue 4

Tj = 125°C

6000A

4000A

2000A

1000A

Recovered charge - Q

1000

10 100 1000

Commutation rate - di/dt (A/µs)

Figure 7 - Peak reverse recovery current, I

10000

R3708FC40#-45#

Issue 4

Tj = 125°C

(A)

RM

1000

Reverse recovery current - I

100

10 100 1000

Commutation rate - di/dt (A/µs)

rm

6000A
4000A
2000A
1000A

Figure 8 - Maximum recovery time, trr (50% chord)

100

, 50% chord (µs)

rr

10

Reverse recovery time - t

1

10 100 1000

Commutation rate - di/dt (A/µs)

R3708FC40#-45#

Issue 4

Tj = 125°C

6000A
4000A
2000A
1000A

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 8 of 12 October, 2007

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

10

R3708FC40#-45#

Tj = 125°C

= 400V

V

r

Measured

without

snubber

Issue 4

1.00E+03

1.00E+02

R3708FC40#-45#

Issue 4

Tj=125°C

(J)

r

1

Reverse energy per pulse - E

0.1

10 100 1000

Commutation rate - di/dt (A/µs)

4000A
3000A
2000A
1000A

1.00E+01

1.00E+00

Energy per pulse (J)

1.00E-01

1.00E-02

8000A

6000A

4000A

2000A

1000A

500A

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

Pulse width (s)

Figure 11 - Sine wave frequency ratings Figure 12 - Sine wave frequency ratings

1.00E+05

1.00E+04

1000A

2000A

R3708FC40#-45#

100% Duty Cycle

Issue 4

TK=55°C

1.00E+05

1.00E+04

R3708FC40#-45#

1000A

100% Duty Cycle

2000A

Issue 4

TK=85°C

1.00E+03

4000A

Frequency (Hz)

1.00E+02

1.00E+01

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

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 9 of 12 October, 2007

6000A

8000A

Pulse Width (s)

1.00E+03

Frequency (Hz)

1.00E+02

1.00E+01

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

4000A

6000A

8000A

Pulse wi dth (s)

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

1.00E+05

1.00E+04

2000A

4000A

R3708FC40#-45#

di/dt=100A/µs

100% Duty Cycle

Issue 4

TK=55°C

1.00E+05

1.00E+04

1000A

2000A

R3708FC40#-45#

di/dt=100A/µs

100% Duty Cycle

Issue 4

TK=85°C

6000A

1.00E+03

Frequency (Hz)

1.00E+02

1.00E+01

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

8000A

Pulse wi dth (s)

1.00E+03

Frequency (Hz)

1.00E+02

1.00E+01

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

4000A

6000A

8000A

Pulse wi dth (s)

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

1.00E+05

1.00E+04

1000A

2000A

R3708FC40#-45#

Issue 4

di/dt=500A/µs

TK=55°C

100% Duty Cycle

1.00E+05

1.00E+04

500A

1000A

2000A

R3708FC40#-45#

100% Duty Cycle

Issue 4

di/dt=500A/µs

TK=85°C

4000A

1.00E+03

Frequency (Hz)

1.00E+02

1.00E+01

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 10 of 12 October, 2007

6000A

8000A

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

Pulse wi dth (s)

1.00E+03

Frequency (Hz)

1.00E+02

1.00E+01

4000A

6000A

8000A

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

Pulse wi dth (s)

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

1.00E+03

R3708FC40#-45#

Issue 4

di/dt=100A/µs

Tj=125°C

1.00E+03

R3708FC40#-45#

Issue 4

di/dt=500A/µs

Tj=125°C

1.00E+02

1.00E+01

1.00E+00

Energy per pulse (J)

1.00E-01

1.00E-02

1000A

500A

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

8000A

6000A

4000A

2000A

Pulse wi dth (s)

Figure 19 - Maximum surge and I2t Ratings

Gate may temporarily lose control of conduction angle

1000000

R3708FC40#-45#

Issue 4

Tj (initial) = 125°C

(A)

TSM

100000

1.00E+02

8000A
6000A
4000A

1.00E+01

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 wi dth (s)

I2t: V

I2t: 60% V

RRM

≤10V

RRM

2000A
1000A
500A

1.00E+09

1.00E+08

2

2

s)

t (A

I

: V

≤10V

RRM

: 60% V

RRM

1.00E+07

10000

TSM

I

TSM

Total peak half sine surge current - I

1000

1.00E+06

1 3 5 10 1 5 10 50 100

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

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 11 of 12 October, 2007

Maximum I

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Outline Drawing & Ordering Information

ORDERING INFORMATION (Please quote 10 digit code as below)

R3708 FC

Fixed

Type Code

Typical order code: R3708FC42V – 4200V V

Outline Code

Fixed

, 2700V V

DRM

250µs tq, 37.7mm clamp height capsule.

RRM

♦♦♦♦ ♦♦♦♦♦

Fixed Voltage Code

V

/100

DRM

40-45

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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 Westcode Semiconductors Ltd.

In the interest of product improvement, Westcode reserves the right to change specifications at any ti me without prior notice.

Devices with a suffix code (2-letter, 3-letter or letter/digit/letter combination) added to their generi c code are not necessarily
subject to the conditions and limits contained in this report.

♦

♦♦

t

Code

q

V=250µs, W=300µs,

X = 400µs

© Westcode Semiconductors Ltd.

Data Sheet. Types R3708FC40# to R3708FC45# Issue 4 Page 12 of 12 October, 2007