Littelfuse PGBSOT23 User Manual

Surface Mount Polymeric ESD Suppressors

PulseGuard®Suppressors

210

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PGB Series SOT23 ESD Suppressor

Product Overview

PulseGuard ESD Suppressors help protect sensitive electronic
equipment against electrostatic discharge (ESD).They supplement the
on-chip protection of integrated circuitry and are best suited for low­voltage, high-speed applications where low capacitance is important.
Data ports utilizing such high-speed protocols as USB 2.0, IEEE1394
and InfiniBandSMcan benefit from this new technology. PulseGuard
suppressors use polymer composite materials to suppress fast-rising
ESD transients (as specified in IEC 61000-4-2 and MIL-STD-883E).

Features

• Ultra-low capacitance

• Low leakage current

• Fast response time

• 2-lines of protection

• Bi-directional

• Withstands multiple ESD strikes

• Standard JEDEC SOT23 outline

• Compatible with pick-and-place processes

• Available in 3,000 piece reels

Typical Applications

• Servers

• Laptop/Desktop Computers

• Network Hardware

• Computer Peripherals

• Digital Cameras

• External Storage

Ordering Information

CATALOG NUMBER PIECES PER REEL

PGB002ST23WR 3,000

Design Consideration

Because of the fast rise-time of the ESD transient, placement of
PulseGuard suppressors is a key design consideration.To achieve
optimal ESD suppression, the devices should be placed on the circuit
board as close to the source of the ESD transient as possible.Install
PulseGuard suppressors directly behind the connector so that they are
the first board-level circuit component encountered by the ESD transient.
They are connected from signal/data line to ground.

Reference Dimensions:

1.01 (.040")*

2.29

(.090")

0.635
(.025")

0.51

(.020")

Note: For wave solder, increase the spacing
in both the horizontal and vertical dimensions by

0.254 (.010") where denoted by an asterisk (*)

Reflow
Solder

1.01 (.040")

1.27

(.050")

1.01 (.040")

(.050")

2.032 (.080")*

1.27

Sn

1.01 (.040")

2.24 (.088")

0.81

(.032") REF

2.997

(.118")

2.032

(.080")

0.076

(.003") MIN (TYP)

0.762

(.030")

Equivalent Circuit

3

1

2

PulseGuard®Suppressors

Surface Mount Polymeric ESD Suppressors

211

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PGB Series SOT23 ESD Suppressor

Capacitance vs. Frequency

Carrier T ape Specifications

Parts are delivered on 7” (178mm) reel, plastic carrier tape

DESCRIPTION

Ct- Cover tape thickness
Dd- Drive hole diameter
Ds- Drive hole spacing
Pd- Pocket depth
Ph- Pocket height
Ps - Pocket spacing
Pw- Pocket width
Tt- Carrier tape thickness
Tw- Carrier tape width

MEASUREMENT (MM)

0.06

1.50

4.00

1.02

3.23

4.00

2.46

0.30

8.00

Electrical Characteristics

ESD Capability

IEC 61000-4-2 Direct Discharge....................................................8kV

IEC 61000-4-2 Air Discharge.......................................................15kV

Trigger V oltage1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,000V typical

Clamping Voltage1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150V typical

Rated Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24VDC max

Capacitance2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.055pF

Response Time1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <1ns

Leakage Current3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <1nA

ESD Pulse Withstand4. . . . . . . . . . . . . . . . . . . . . . 1,000 pulses minimum

Notes:

1.Trigger and clamping voltage measured per IEC 61000-4-2, 8kV direct

discharge method.

2. Capacitance measured at 1MHZ.

3. Leakage current measured at 6VDC.

4. Pulse Withstand- some shifting in characteristics may occur when

tested over multiple pulses at a very rapid rate.

Environmental Specifications

Operating Temperature: -65°C to +125°C.
Moisture Resistance, steady state: MIL-STD-833, method 1004.7,

85% RH, 85°C, 1000hrs.

Thermal Shock: MIL-STD-202, Method 107G, -65°C to 125°C,
30 min cycle, 10 cycles.
Vibration:

MIL-STD-202F, Method 201A, (10 to 55 to 10Hz,

1 min. cycle, 2grs each in X-Y-Z)

Chemical Resistance: ASTM D-543, 4hrs @ 40°C, 3 solutions (H2O,

detergent solution, defluxer)

Solder leach resistance and terminal adhesion: Per EIA-576

test

Physical Specifications

Materials:

Body: Glass Epoxy
Terminations: Copper/Nickel/Tin/Lead

Solderability: MIL-STD-202, Method 208 (95% coverage)
Soldering Parameters:

Wave Solder – 260°C, 10 seconds maximum.
Reflow Solder – 260°C, 30 seconds maximum.

Packaging Specifications

8mm Tape and Reel per EIA-RS481-1 (IEC 286, part3); 3,000 pieces per
reel, add packaging suffix, WR.

4

PULSEGUARD

®

SUPPRESSORS

70

60

50

Capacitance (fF)

40

Frequency (GHz)

** Note: 1,000 fF = 1 pF

1.0

T

t

D

D

d

P

d

C

t

+

+

s

++++

P

s

P

2.01.50.5

+

w

T

w

P

h