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AUSC121PN50D↓ 27% off MRP
BrandLauritz Knudsen
CategorySwitchgear
SpecificationReplacement cartridge · for AUSP121PN50D / AUSP123PN50D
Brand SKUAUSC121PN50D
AvailabilityIn stock · ships in 24h
Delivery8 to 15 business days after dispatch
Lauritz Knudsen· In stock
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Lauritz Knudsen AU SPD Replacement Cartridge for AUSP121PN50D / AUSP123PN50D · AUSC121PN50D

$84.27/pc-27%
MRP $115.17
Wholesale · 15+ units
$80.05 /pc
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Delivery in 8 to 15 business days after dispatch
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$84.27 /pc
Delivery in 8 to 15 business days
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100% genuine
Brand-authorised stock, sourced through authorised channels
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Worldwide delivery
Dispatched from Ghaziabad, India · fee by weight, shown at checkout
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Wholesale built in
Wholesale price at 15+ units: $80.05/pc on this product, applied automatically

AU surge protection devices from Lauritz Knudsen, Type 2 and Type 1+2, for 440 V AC and 800 V solar DC applications, with pluggable cartridges.

  • Conforms to IEC 61643-11
  • Available in Type 2 and Type 1+2
  • Type 2: protection against indirect lightning and switching surges, Imax up to 70 kA
  • Type 1+2: protection against direct and indirect lightning, Imax up to 100 kA
  • Pluggable cartridge for each pole
As published by Lauritz Knudsen. Verify critical parameters against the datasheet before specifying.
Lauritz Knudsen Lauritz Knudsen AU SPD Replacement Cartridge for AUSP121PN50D / AUSP123PN50D · AUSC121PN50D · AUSC121PN50D
Device typeSPD replacement cartridge
SeriesAU
Fits / suitable forAUSP121PN50D / AUSP123PN50D
Reference standardIS/IEC 60898-1
BrandLauritz Knudsen
Brand SKUAUSC121PN50D
ELINE9GFG72HK6
Sold asPer pc
Ratings as published by Lauritz Knudsen (Lauritz Knudsen price list Aug 2026). Verify critical parameters against the datasheet before specifying.
Other Lauritz Knudsen ranges and models in this category, closest in price to this one.
Read: Contactor Sizing for 400 V and 415 V Motors: kW to Amps, AC-3 Ratings and Overload Relays →
What size contactor do I need for a 7.5 kW motor?
A 7.5 kW three-phase motor at 400 V draws about 14.5 A, so a contactor rated at least 16 to 18 A at AC-3 is the usual choice, with an overload relay set to the nameplate current.
What is the difference between AC-1 and AC-3?
AC-1 is the rating for resistive loads such as heaters; AC-3 is the rating for switching squirrel-cage motors in normal duty. Motors are always sized on the AC-3 figure, which is lower.
How many amps per kW for a three-phase motor?
At 400 V, roughly 2 A per kW for small motors, falling towards about 1.8 A per kW above 30 kW, because larger motors run at a better power factor and efficiency. Use the nameplate for the exact figure.
Is Lauritz Knudsen AU SPD Replacement Cartridge for AUSP121PN50D / AUSP123PN50D · AUSC121PN50D genuine and warranty-backed?

Yes. Every Lauritz Knudsen product on Elume is 100% genuine, sourced through authorised channels, and carries the manufacturer's standard warranty.

Do you deliver outside India?

Yes, to every country except Pakistan, North Korea, Iran, Syria, Cuba, Russia, Belarus and Afghanistan, and the Crimea, Sevastopol, Donetsk, Luhansk, Zaporizhzhia and Kherson regions. The delivery fee depends on weight and destination and is shown at checkout; international orders are paid by card in US dollars. The full rules are on our shipping page.

Is there a wholesale or bulk rate?

Yes. Orders of 15 or more pcs get a wholesale price below the listed Elume price, applied automatically and shown on every product page.

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