Raycap SPH-4/30VDC Signal Line Surge Arrester

In stock (10 items available)
  • Weight
    0.07 kg
  • SKU

These double channel surge arresters are designed to protect all DC “floating” analogue signal lines both voltage and mA, including TTL levels and PT100 signals.

Buy more for less:
1-4 items AUD219.95 / each  
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  • AUD219.95

Manufactured by Raycap one of the world's leading manufacturers in Surge and Lightning arrestors these units are designed to protect all DC “floating” analogue signal lines both voltage and mA, including TTL levels and PT100 signals.  The maximum potential of any signal line can be 30VDC, signal lines are wired in series, maximum current 1 Amp.  Available as either single channel or double channel, in the case of a double channel each channel is isolated from each other.   Protection is via Gas Discharge Tube technology and high speed silicon avalanche diodes.  The plug in module facilitates the replacement of a failed GDT without the need to disconnect the system wiring and as it is in parallel across the system, failure or removal of the module does not interrupt the analogue signal lines.


  • Wired in series, maximum 1 Amp
  • Suitable for floating DC analogue signals & TTL levels
  • 0-10VDC, 0-10mA, 0-20mA, 4-20mA etc.
  • Suitable for PT100 applications
  • Double channel
  • No fusing required
  • Width only 12mm



  • Complies with: IEC / EN61643-21
  • Category: D1 / C1 / C2 / C3
  • Maximum in series current rating: 1 Amp
  • Nominal max system voltage: 30VDC
  • Absolute max system voltage: 33VDC
  • C2 Nominal discharge current 8/20: 10KA
  • Maximum discharge current 8/20: 20KA
  • D1 impulse current 10/350: 5KA
  • Response time Line - Line: <1n Sec
  • Response time Line - Ground: <100n Sec
  • Serial impedance: Max 2 Ohms
  • Operating temperature range: -40°C to +80°C
  • Terminal cross section: 4mm² stranded cable

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

Full Terms and Conditions

By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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