1999 May 20 2
NXP Semiconductors Product data sheet
Quadruple ESD transient voltage
suppressor
BZA420A
FEATURES
• ESD rating >8 kV, according to IEC1000-4-2
• SOT457 surface mount package
• Common anode configuration
• Non-clamping range −0.5 to 20 V
• Maximum reverse peak power dissipation:
19.6
W at t
p
= 1 ms
• Maximum clamping voltage at peak pulse current:
28
V at I
ZSM
= 0.7 A.
APPLICATIONS
• Computers and peripherals
• Audio and video equipment
• Communication systems
• Medical equipment.
DESCRIPTION
Monolithic transient voltage suppressor diode in a six lead
SOT457 (SC-74) package for 4-bit wide ESD transient
suppression at 20
V level.
PINNING
PIN DESCRIPTION
1 cathode 1
2 common
3 cathode 2
4 cathode 3
5 common
6 cathode 4
Fig.1 Simplified outline (SOT457) and symbol.
handbook, halfpage
132
4
56
1
3
4
6
2
5
Top view
MAM357
Marking code: Z0.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Notes
1. T
s
is the temperature at the soldering point of the anode pin.
2. DC working current limited by P
tot max
.
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
Per diode
I
Z
working current T
s
= 60 °C; note 1 − note 2 mA
I
F
continuous forward current T
s
= 60 °C − 100 mA
I
FSM
non-repetitive peak forward
current
t
p
= 1 ms; square pulse − 3.75 A
I
ZSM
non-repetitive peak reverse
current
t
p
= 1 ms; square pulse; see Fig.2 − 0.7 A
P
tot
total power dissipation T
s
= 60 °C; see Fig.3 − 720 mW
P
ZSM
non repetitive peak reverse power
dissipation
square pulse; t
p
= 1 ms; see Fig.4 − 19.6 W
T
stg
storage temperature −65 +150 °C
T
j
junction temperature −65 +150 °C
