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CG31.5L CG31.5L is a 1500V DC breakdown gas discharge tube from Littelfuse, rated for 5kA nominal impulse discharge current in an axial cylinder through-hole package.
Mfr Part #:

CG31.5L

Available from 3 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
CG31.5L is a 1500V DC breakdown gas discharge tube from Littelfuse, rated for 5kA nominal impulse discharge current in an axial cylinder through-hole package.
Total Stock: 2,518 pcs

CG31.5L Available from 3 distributors

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
2,000 pcs
2000 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
350 pcs
350 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
168 pcs
168 pcs On Request 1 On Request On Request On Request On Request On Request

CG31.5L Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Arc Voltage
Capacitance
DC Breakdown Voltage (Minimum/Typical/Maximum @ @100 V/s)
DC Breakdown Voltage (Typical)
Fail Short
Follow On Current
Impulse Breakdown Voltage (Maximum @ 1 kV/µs)
Impulse Breakdown Voltage (Maximum @ 100 V/µs)
Impulse Discharge Current (8
Insulation Resistance
Max Surge Current
Medical Grade
Mounting Type
Nominal Impulse Discharge Current (Nominal @ 8/20 µs)
Nominal Impulse Discharge Current (Nominal @ 8/20 µs, 10 shots)
Number of Poles
SVHC Present
Storage Temperature
Tape & Reel
Voltage

CG31.5L Description

Short technical summary and product information.

The CG31.5L is a two-electrode gas discharge tube (GDT) from Littelfuse's CG3 series, designed for surge protection and high isolation applications. It features a DC breakdown voltage of 1500V typical (1200V min, 1800V max at 100V/s) and impulse breakdown voltages of 1800V max at 100V/µs and 2000V max at 1kV/µs.

 

This GDT offers a nominal impulse discharge current of 5kA (8/20µs, 10 shots) and a maximum surge current of 10kA (8/20µs, 1 shot). It has a low capacitance of less than 1.5 pF at 1MHz, high insulation resistance of 10 GΩ minimum at 100V, and a typical arc voltage of approximately 25V at 1A. The device can extinguish AC follow-on currents up to 200A.

 

The CG31.5L is housed in an axial cylinder package with through-hole mounting and has 2 poles. It is suitable for applications such as CRT terminals, CATV equipment, antennas, power supplies, and medical electronics.

CG31.5L Quick Information

Product Type: Gas Discharge Tube (GDT)
Series: CG3
Canonical Name: CG31.5L Littelfuse Gas Discharge Tube
Subcategory: Two-Electrode GDT

CG31.5L Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

CG31.5L Features

  • 1500V typical DC breakdown voltage.
  • 5kA nominal impulse discharge current.
  • Low capacitance less than 1.5 pF.
  • Through-hole axial cylinder package.
  • 2-pole two-electrode design.

CG31.5L Applications

  • Used in CRT terminal surge protection.
  • Ideal for CATV equipment protection.
  • Suitable for power supply circuits.
  • Applied in medical electronics.

CG31.5L FAQs

7 frequently asked questions generated from this part’s specifications.
What is the DC breakdown voltage of the CG31.5L?

The DC breakdown voltage is 1200V minimum, 1500V typical, and 1800V maximum at 100V/s.

What is the impulse breakdown voltage of the CG31.5L?

The impulse breakdown voltage is 1800V maximum at 100V/µs and 2000V maximum at 1kV/µs.

What is the nominal impulse discharge current rating?

The nominal impulse discharge current is 5kA (8/20µs, 10 shots).

What is the capacitance of the CG31.5L?

The capacitance is less than 1.5 pF at 1MHz.

What is the package type and mounting?

The CG31.5L comes in an axial cylinder package with through-hole mounting and has 2 poles.

What is the insulation resistance?

The insulation resistance is 10 GΩ minimum at 100V.

What is the maximum follow-on current?

The maximum follow-on current is 200A.

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