PGB LITTELFUSE | Alldatasheet

Document overview

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Technical content

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

Electrical Characteristics

Notes: 1. 8 kV direct discharge method, per IEC 61000-4-2. 2. Measured at 1 MHz. 3. Measured at 6 VDC. Testing at fast ESD pulse rates (1-20Hz) may cause a change in leakage current performance (6µA, max). Physical Specifications Materials: Body: Glass Epoxy Terminations: Tin-Lead Soldering Parameters: Wave solder -- 260°C, 10 seconds maximum Reflow solder -- 260°C, 30 seconds maximum Operating Temperature Range: -65°C to 125°C

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.

PGB Series SOT23 Surface Mount ESD Suppressor PulseGuard® Suppressors 178 www.littelfuse.com Definitions Trigger Voltage:The measured peak voltage across the ESD suppressor before it transitions from high to low resistance. It is manifested as a “spike”before the clamping voltage is achieved. This voltage is typically well below the damage threshold of on-chip IC protection. Clamping Voltage:The voltage level to which the ESD impulse voltage is reduced. This is the voltage that the suppressor holds at, until the ESD transient energy is dissipated. ESD Impulse Voltage: Also known as the ESD Threat Voltage. This is the voltage that is “zapped”into the circuit. Voltages generated by people can exceed 15 kV. The IEC 61000-4-2 defines four levels of impulse voltage for testing purposes: Trigger Voltage Clamping Voltage Time (ns) Voltage (V) Trigger Voltage Clamping Voltage Voltage (V) Current (A) ** Note: 1,000 fF = 1 pF Frequency (GHz) Capacitance (fF) 1.0 2.01.50.5 Capacitance vs. Frequency Generalized PulseGuard Suppressor Response to ESD (Positive and Negative Polarity ESD Pulses) Generalized I-V Curve (Positive and Negative Polarity ESD Pulses) SEVERITY LEVEL AIR DISCHARGE 2 kV 4 kV 8 kV 15 kV DIRECT DISCHARGE 2 kV 4 kV 6 kV 8 kV Pd Ct Tt ++++ Tw Ds Ph Dd Ps Pw Carrier Tape Specifications Parts are delivered on 7”(178mm) reel, plastic carrier tape

DESCRIPTION

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

SOLDER METHOD INCH MM INCH MM INCH MM INCH MM INCH MM PGB Series SOT23 Surface Mount ESD Suppressor PulseGuard® Suppressors Polymeric ESD Suppressors 179www.littelfuse.com 4PULSEGUARD® SUPPRESSORS Test Set-up for IEC 61000-4-2 Waveform, 2kV-15kV Note: Pin 3 (common) is typically connected to chassis ground. However, since PulseGuard suppressors are bi-directional, thex system voltage bus can also be used as the ESD “dump”. Device under test Tek P6156 Probe (Voltage measurement) Faraday cage KeyTek pulser Brown tip (x100) 2,000- 15,000 V x10 Tektronic TDS 684B Ground return x10 Blue tip (x10) .5 ohm shunt (10-5 ohms in parallel) Tek P6156 Probe (Current measurement) 2.032 (0.080") a * Dimension "a" is: 0.066 (.026") * Dimension "b" is: 0.076 (.030") 2.997 (0.118") b a b c e d 2.24 (0.088") Recommended Pad Layout: Device Dimensions: Equivalent Circuit: Reference Schematics: