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Black DB9 surge protector for serial connections

Tripp Lite

Tripp Lite DB9 Surge Protector 120V 230V 340A 18V

SKU CH-W9CK-X2GNC MPN DB9

Protects 9-pin serial data lines with 340 A capacity and 18 V clamping at 120 V or 230 V

  • Supported voltage120 V, 230 V
  • Output current rating340 A
  • Clamp voltage18 V - RMS
  • Spec summaryTripp Lite DB9 Dataline Surge Protector
  • Product colorBlack
  • Key featuresDB9 protects 9 pin serial connections for dataline surge sup
  • Protects 9-pin serial links from transient spikes
  • Handles both 120 V and 230 V power environments
  • Clamps surges at 18 V RMS to shield connected gear
  • Rated for 340 A surge current capacity
  • Reversible design fits male or female DB9 ports

Purpose and audience

The Tripp Lite DB9 surge protector safeguards 9-pin serial connections on data terminals, communications equipment, PCs, printers and modems. It is built for installers and IT staff who need reliable dataline suppression on legacy serial ports.

Bundled value

The package includes the DB9 surge suppressor itself and a lifetime limited warranty from the manufacturer. No additional cables, software or mounting hardware are supplied with the unit.

Deciding specification

The clamping voltage is rated at 18 volts RMS and the suppressor handles up to 340 amps of surge current. It operates on both 120V and 230V systems and fits male or female captive DB9 ports.

How it compares

Measured against everything we stock in Surge Protector Power Strips, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 84% of the 565 comparable items (median $37.99).

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Specifications

Product
Brand nameTRIPP LITE
Model nameDB9
Product colorBlack
Power
Supported voltage120 V, 230 V
Output current rating340 A
Clamp voltage18 V - RMS
Size & build
Shipping weight0.08 kg
Package size154 × 76 × 53 mm

Questions about this item

Will the DB9 surge protector need replacement after it absorbs a large surge?

The unit uses sacrificial components that degrade after a major surge event, so it should be replaced if connected equipment survives a significant spike.

What clamping voltage limits the let-through energy during a sustained over-voltage?

The clamping voltage is 18 volts RMS, which is the level at which excess energy is diverted away from the protected serial line.

Does the suppressor generate heat or draw power when protecting a serial link continuously?

It remains passive during normal operation, drawing no measurable current and producing no heat until a surge exceeds the 18 V clamping threshold.

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