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TZ421A-SMD AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

TZ421A-SMD product

TZ421A-SMD

Ceramic Capacitors

GDTSMD420 V5 kA8/20 µsUL497Blow capacitance

TZ421A-SMD is a 420 V SMD gas discharge tube for high-energy surge diversion, rated at 5 kA for an 8/20 µs impulse.

Best for

  • Surge diversion on telecom or signal interfaces
  • Broadband and base-station equipment
  • AC or DC protection circuits using coordinated surge components

Avoid if

  • The normal line voltage can exceed 336 V
  • The design cannot safely manage prolonged fault or follow current
  • Very low clamping voltage is required before GDT ignition

Check before use

  • 420 V nominal DC breakdown voltage
  • 5 kA nominal 8/20 µs discharge-current requirement
  • Impulse breakdown voltage of up to 1000 V at 1 kV/µs
  • PCB land pattern and 7.6 mm × 5.0 mm × 5.0 mm package clearance

Key specifications

DC breakdown voltage
420 V at 100 V/s
Breakdown range
336 V to 504 V
Nominal discharge current
5 kA, 8/20 µs
Impulse breakdown
≤1000 V at 1 kV/µs
Capacitance
≤1.0 pF at 0.5 VDC, 1 MHz

Compliance & Environment

RoHS
Compliant
REACH
Compliant
MSL
-
ECCN
-
HTSUS
-

Application

Telecom and broadband line protectionBase station and antenna protectionPower-line surge protection

Datasheet

b72d233950f413ee399c84b258eea2f1_TZ421A-SMD.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for TZ421A-SMD: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
Schematic symbol for your EDA tool
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

TZ421A-SMD is a two-electrode surface-mount gas discharge tube from SET. It switches from a high-impedance state to a low-impedance discharge path during an overvoltage event.