Littelfuse PGB10402 Series - Manual (Page 3)

PULSE-GUARD ® ESD Suppressors
Surface Mount Polymeric Electrostatic Discharge Suppressors
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/26/13
Environmental Specifications
Operating Temperature -65°C to +125°C
Moisture Resistance
0402 series:
40°C, 95% RH, 1000 hours
0603, ST23:
85°C, 85% RH, 1000 hours
Thermal Shock
MIL-STD-202, Method 107,
-65°C to 125°C, 30 min. cycle,
10 cycles
Vibration
MIL-STD-202, Method 201, (10
to 55 to 10 Hz, 1 min. cycle, 2
hrs each in X-Y-Z)
Chemical Resistance MIL-STD-202, Method 215
Solder Leach Resistance and
Terminal Adhesion
IPC/EIA J-STD-002
Physical Specifications
Materials
Body: Glass Epoxy
Terminations: Copper/Nickel/Tin
Solderability MIL-STD-202, Method 208
Soldering
Parameters Wave solder - 260°C, 10 seconds maximum
Reflow solder - 260°C, 30 seconds maximum
Design Consideration
Because of the fast rise-time of the ESD transient, proper
placement of PULSE-GUARD suppressors are a key design
consideration to achieving optimal ESD suppression. The
devices should be placed on the circuit board as close to the
source of the ESD transient as possible. Install PULSE-GUARD
suppressors (connected from signal/data line to ground)
directly behind the connector so that they are the first board-
level circuit component encountered by the ESD transient.
Soldering Parameters
Time
Te
mperatur
e
T
P
T
L
T
S(max)
T
S(min)
25
t
P
t
L
t
S
time to peak temperature
Preheat Preheat
Ramp-up Ramp-up
Ramp-down Ramp-do
Reflow Condition Pb – Free assembly
Pre Heat
- Temperature Min (T
s(min)
) 150°C
- Temperature Max (T
s(max)
) 200°C
- Time (min to max) (t
s
) 60 – 180 seconds
Average ramp up rate (Liquidus Temp
(T
L
) to peak
3°C/second max
T
S(max)
to T
L
- Ramp-up Rate 3°C/second max
Reflow
- Temperature (T
L
) (Liquidus) 217°C
- Temperature (t
L
) 60 – 150 seconds
Peak Temperature (T
P
) 260°C
Time within 5°C of actual peak
Temperature (t
p
)
10 – 30 seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (T
P
) 8 minutes max
Based on IPC/JEDEC J-STD-020
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