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Lauritz Knudsen AU SPD · Type 1+2 · 1P+N · Imax 50 kA · 440 V · AUSP121PN50DAUSP121PN50D↓ 27% off MRP
BrandLauritz Knudsen
CategorySwitchgear
SpecificationSPD Type 1+2 · 1P+N · Imax 50 kA · Iimp 12.5 kA · Uc 440 V · 2 modules · pluggable cartridges
Brand SKUAUSP121PN50D
AvailabilityIn stock · ships in 24h
DeliveryPan-India · 7 working days
Lauritz Knudsen· In stock
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Lauritz Knudsen AU SPD · Type 1+2 · 1P+N · Imax 50 kA · 440 V · AUSP121PN50D

₹10,563/pcincl. GST-27%
₹8,952 + 18% GST · MRP ₹14,438
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₹10,563 /pc incl. GST
Free pan-India delivery

Lauritz Knudsen AU SPD · Type 1+2 · 1P+N · Imax 50 kA · 440 V · AUSP121PN50D: Elume price today ₹10,563 per pc incl. GST, 27% below the ₹14,438 MRP. The price has held steady for the last 30 days.

Price history
Elume price over time, day by day. Market comparison appears once we track this item.
16 Aug to 14 Nov
₹15,449₹13,665₹11,881₹10,096₹8,312₹14,438₹10,563
16 Aug3 Sep21 Sep9 Oct27 Oct14 Nov
Elume today
₹10,563
MRP
₹14,438
Lowest in view · 12 Sep
₹8,938
Highest in view · 3 Oct
₹10,563
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Wholesale built in
Wholesale price at 15+ units: ₹10,035/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 · Type 1+2 · 1P+N · Imax 50 kA · 440 V · AUSP121PN50D · AUSP121PN50D
Device typeSurge protection device (SPD)
SeriesAU
Poles1P+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 (10/350 µs)
Width2 modules
Reference standardIEC 61643-11
Breaking capacity50 kA
BrandLauritz Knudsen
Brand SKUAUSP121PN50D
ELINE7222K9676
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 · Type 1+2 · 1P+N · Imax 50 kA · 440 V · AUSP121PN50D 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 across India?

Yes. We deliver anywhere in India our couriers serve, usually within 5 to 7 working days from order confirmation (3 to 4 with expedited delivery on orders of Rs 10,000 and above). The delivery charge follows the order value (the GST-inclusive goods total after any discount code): ₹200 under ₹2,000; ₹100 from ₹2,000 to under ₹4,000; free from ₹4,000 to ₹25,000; ₹1,000 above ₹25,000, because large orders ship insured, often in several boxes. Heavy consignments add ₹1,000 for every started 10 kg beyond the first 10 kg of the order's total shipping weight, even when delivery is free. A free-delivery code makes the whole delivery charge zero. Every charge is shown at checkout before you pay.

Can I get a GST invoice?

Yes, on orders delivered in India. Enter your GSTIN at checkout and we issue a GST invoice with tax shown separately, so businesses can claim input tax credit.

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.

What if I find it cheaper somewhere else?

Tell us. If the same Lauritz Knudsen product is listed for less, GST and delivery included, by an authorised Indian online seller, we match that price, before you order or within 7 days of ordering. The terms are on our lowest-price guarantee page.

What is the return policy?

For delivery in India, unused items in original packaging can be returned within 7 days of delivery, with free return shipping.

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