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Lauritz Knudsen AU SPD · 3P+N · 50 kA · Type 1+2 · AUSP123PN50DAUSP123PN50D↓ 51% off MRP
BrandLauritz Knudsen
CategorySwitchgear
SpecificationSPD · 3P+N · Type 1+2 · 50 kA · 440 V · 4 M
Brand SKUAUSP123PN50D
AvailabilityIn stock · ships in 24h
Delivery8 to 15 business days after dispatch
Lauritz Knudsen· In stock★5.0(1)
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Lauritz Knudsen AU SPD · 3P+N · 50 kA · Type 1+2 · AUSP123PN50D

$195.84/pc-51%
MRP $396.76
Wholesale · 15+ units
$186.05 /pc
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$195.84 /pc
Delivery in 8 to 15 business days
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Lauritz Knudsen AU SPD · 3P+N · 50 kA · Type 1+2 is an SPD from Lauritz Knudsen. It diverts lightning and switching surges to earth so that the equipment downstream survives them. Key ratings: Poles 3P+N, SPD type Type 1+2, Imax 50 kA, Uc 440 V AC (common + differential mode), Rated voltage 440 V, Width 4 M. It is built to IEC 61643-11.

As published by Lauritz Knudsen. Verify critical parameters against the datasheet before specifying.
Lauritz Knudsen Lauritz Knudsen AU SPD · 3P+N · 50 kA · Type 1+2 · AUSP123PN50D · AUSP123PN50D
Device typeSurge protection device (SPD)
SeriesAU
Poles3P+N
SPD typeType 1+2
Max continuous operating voltage (Uc)440 V AC (common + differential mode)
Max discharge current (Imax)50 kA
Impulse current (Iimp)12.5 kA
Rated voltage440 V
Width4 modules
Reference standardIEC 61643-11
Breaking capacity50 kA
BrandLauritz Knudsen
Brand SKUAUSP123PN50D
ELINE9G77M3CMR
Sold asPer pc
Ratings as published by Lauritz Knudsen (Lauritz Knudsen price list Aug 2026; Product name; Lauritz Knudsen smartshop). 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 · 3P+N · 50 kA · Type 1+2 · AUSP123PN50D 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.

★5.0(1)
★5.0✓ VerifiedRajdeep Singh Bhatia · 7 Oct