AU SPD Iimp 12.5kA; Imax 50kA 3P+N 400V AC Type 1+2 | L&T – AUSP123PN50

Name: L&T AUSP123PN50 Surge Protector 12.5kA 50kA 400V 3P+N
Brand: Lauritz Knudsen (L&T)
SKU: AUSP123PN50

SKU: AUSP123PN50

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The AUSP123PN50 AUSP123PN50 is a surge protection device (spd), engineered for reliable circuit protection and isolation in demanding Indian and international installations. Key ratings include 400V AC, 3 Poles + Neutral (3P+N). Buy the AU SPD Iimp 12.5kA; Imax 50kA 3P+N 400V AC Type 1+2 | L&T online at myelectric.in with GST invoice, genuine-product assurance, and fast delivery across India — bulk and worldwide export enquiries welcome.

📋 Technical Specifications

Parameter	Value
Brand	AUSP123PN50
Part Number / SKU	AUSP123PN50
Category	Surge Protection Device (SPD)
Voltage Rating	400V AC
Poles	3 Poles + Neutral (3P+N)
Breaking Capacity	12.5 kA
Rated Frequency	50/60 Hz
Standard	IEC 61643-11
Certifications	BIS certified where applicable

⚡ Key Features

400V AC maximum continuous operating voltage (Uc) — remains permanently connected to the live supply; clamping only activates during overvoltage events.
MOV (Metal Oxide Varistor) clamping technology — responds in nanoseconds (< 25ns) to clamp transient overvoltages before they reach connected sensitive electronics.
Visual end-of-life indicator — green flag (healthy) turns red when the MOV has absorbed its rated energy and must be replaced; ensures protection level is always verified.
35mm DIN rail mounting — installs inside the main distribution board at the point of entry; protects the entire downstream installation in a single device.
Type 1 / Class I — designed for installation at the service entrance to handle direct lightning strike currents; mandatory in structures with external lightning protection systems.
Manufactured to IEC 61643-11 — complies with the applicable Indian BIS and IEC international standards for this product category.
BIS certified where applicable — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised AUSP123PN50 product — sourced directly from the official distribution network with full manufacturer traceability and warranty.
GST invoice provided for India orders — valid for corporate procurement, government project orders, and public tender supply via myelectric.in.
Worldwide export available — UAE, Singapore, UK, USA, Sri Lanka & more. Contact +91 94814 00316 for bulk pricing and international shipping.

❓ Frequently Asked Questions

Q: What does the 12.5 kA breaking capacity on the AUSP123PN50 mean in practice?

A: Breaking capacity (12.5 kA) is the maximum prospective short-circuit current the AUSP123PN50 can safely interrupt without damage. Before installing, verify that the prospective fault level at the installation point does not exceed 12.5 kA — this is checked using a fault level calculation or from the upstream transformer impedance data. Installing a breaker with insufficient breaking capacity is a serious safety violation.

Q: After a short-circuit trip on the AUSP123PN50, can it be reset and reused immediately?

A: After a short-circuit trip, do not immediately reset the AUSP123PN50. First, identify and clear the fault. Then inspect the device — if there is visible arc damage, melted insulation, or the handle does not reset smoothly, the device must be replaced. The 12.5 kA rated breaking capacity is not unlimited — it is the maximum fault current the device can interrupt safely for a defined number of operations (typically 1–3 at full Icu rating). After any significant fault, factor replacement into your maintenance budget.