Reverse Blocking Triode Thyristor
TFA5x
Series
2
K
A
G
Pin-out Diagram
Thermal Characteristics May require derating at maximum conditions
Characteristic Symbol Test Conditions Value Units
Package Thermal Resistance
(Junction to Case)
R
θJC
For AC 3.8 ºC/W
All performance characteristics given are typical values for circuit or
system baseline design only and are at the nominal operating voltage and
an ambient temperature, T
A
, of 25°C, unless oth er wise stated.
123
Absolute Maximum Ratings
Characteristic Symbol Notes Rating Units
Peak Repetitive Off-State Voltage V
DRM
TFA57x
T
J
= –40°C to 150°C, R
GREF
= 1 k
700 V
TFA58x
800 V
Isolation Voltage V
ISO
AC RMS applied for 1 minute between lead and case 1800 V
Average On-State Current I
T(AV)
50 Hz half cycle sine wave, Conduction angle (α) = 180°,
continuous operation, T
C
= 115°C
5.0 A
RMS On-State Current I
T(RMS)
7.8 A
Surge On-State Current I
TSM
f = 60 Hz
Half cycle sine wave, single, non-repetitive
88 A
f = 50 Hz 80 A
I
2
t Value for Fusing I
2
t Value for 50 Hz half cycle sine wave, 1 cycle, I
TSM
= 80 A 32 A
2
• s
Critical Rising Rate of On-State Current di/dt
I
T
= I
T(RMS)
× π, V
D
= V
DRM
× 0.5, f ≤ 60 Hz, t
gw
10 s, t
gr
≤ 250
ns, i
gp
30 mA (refer to Gate Trigger Circuit diagram)
50 A/s
Peak Forward Gate Current I
FGM
f 50 Hz, duty cycle 10% 2.0 A
Peak Forward Gate Voltage V
FGM
f 50 Hz, duty cycle 10% 10 V
Peak Reverse Gate Current V
RGM
f 50 Hz 5.0 V
Peak Gate Power Dissipation P
GM
f 50 Hz, duty cycle 10% 5.0 W
Average Gate Power Dissipation P
GM(AV)
T
J
< T
J
(max) 0.5 W
Junction Temperature T
J
–40 to 150 ºC
Storage Temperature T
stg
–40 to 150 ºC
Selection Guide
Part Number
V
DRM
(V)
UL-Recognized
Component
Package Packing
TFA57(I) 700 Yes
3-pin fully molded SIP with
heatsink mount
50 pieces per tube
TFA57S 700 –
TFA58(I) 800 Yes
TFA58S 800 –
Terminal List Table
Number Name Function
1K
Cathode terminal
2 A Anode terminal
3 G Gate control
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
