Schneider IPRU40‑40KA Surge Protective Device

IPRU40‑40KA is a Type 2 pluggable AC surge protective device (SPD) from Schneider Electric’s Acti9 series.

Key specifications: maximum discharge current 40 kA, nominal discharge current 20 kA, maximum continuous operating voltage 350 V AC.

It uses metal oxide varistor (MOV) technology and is suitable for lightning and surge protection in power distribution networks with TT/TN‑S earthing systems.

Model Explanation

Code	Meaning	Description
IPRU	Series	Pluggable SPD of Schneider Acti9 series, supports hot‑swap module replacement for easy maintenance
40	Maximum discharge current (Imax)	40 kA (8/20 μs waveform)
40KA	Nominal discharge current (In)	20 kA (8/20 μs waveform) (Note: 40KA in model corresponds to In = 20 kA)
350V	Maximum continuous operating voltage (Uc)	350 V AC, suitable for 400 V three‑phase and 230 V single‑phase systems
P	Number of poles	1P+N / 2P / 3P+N / 4P

Key Technical Specifications

Item	Value	Note
Protection class	Type 2	Complies with IEC 61643‑11:2011 & EN 61643‑11:2012
Discharge current	In = 20 kA, Imax = 40 kA (8/20 μs)	Common mode (CM) & differential mode (DM)
Voltage protection level (Up)	≤ 1.8 kV (DM), ≤ 1.4 kV (CM)	Low residual voltage
Response time	≤ 25 ns	Nanosecond‑level response
Operating voltage	Ue = 230/400 V AC, 50/60 Hz	Standard low‑voltage distribution
Max continuous voltage (Uc)	350 V AC (DM), 260 V AC (CM)	Stable under grid fluctuations
Ingress protection	IP40 front, IP20 terminals	Industrial environment suitable
Operating temperature	‑25 °C to +60 °C	Wide temperature range
Mounting	35 mm standard DIN rail	Compatible with Acti9 circuit breakers
Wiring	Max 35 mm², recommended 16 mm² solid / 25 mm² flexible	Good conductivity & heat dissipation
Dimensions	Width varies with poles (2P:45 mm, 3P+N:72 mm, 4P:90 mm), H85 mm, D65 mm	Compact design
Weight	Approx. 200–450 g (depends on poles)	Lightweight
Earthing system	TT / TN‑S	Not suitable for TN‑C

Key Advantages & Applications
Advantages

Pluggable design: Hot‑swap module without power interruption

Easy maintenance: Local status indicator (green = normal, red = fault)

High reliability: MOV technology, long service life, strong anti‑aging

Safe design: Built‑in thermal disconnector to prevent fire risk

Strong compatibility: Fully compatible with Schneider Acti9 series

Typical Applications

Field	Application	Protected Equipment
Industrial automation	Workshop power, PLC cabinets, VFDs	Automation equipment, sensors
Commercial buildings	Offices, malls, hotels	Lifts, HVAC, security, networks
Infrastructure	Data centers, telecom, transport	Servers, communication, monitoring
New energy	PV inverters, wind converters	Power electronic devices
Residential	Distribution boards, smart homes	Household appliances

Common Models & Pole Configurations

Full Model	Poles	Order No.	Application
IPRU40‑40KA 1P+N 350V	1P+N	A9L040200	Single‑phase 2‑wire
IPRU40‑40KA 2P 350V	2P	A9L040300	Single‑phase 3‑wire
IPRU40‑40KA 3P+N 350V	3P+N	A9L040600	Three‑phase 4‑wire
IPRU40‑40KA 4P 350V	4P	A9L040400	Three‑phase 4‑wire (full‑pole)

Selection & Usage Notes
Coordination: Used as Type 2 protection, cooperate with Type 1 (e.g. IPR 120KA)
Pole selection: 3P+N/4P for three‑phase; 2P/1P+N for single‑phase
Installation: Incoming side of main / sub‑distribution board, after circuit breaker
Backup protection: Series 16–32A circuit breaker (breaking capacity ≥ 50 kA)
Wiring: Short and thick copper cable, length ≤ 50 cm
Maintenance: Check indicator regularly; replace module when red (typical 5–8 years)
Difference Between IPRU40 & IPRD40

Feature	IPRU40	IPRD40	Description
Module type	Basic pluggable	Pluggable with remote indication	IPRD40 supports remote signal
Status	Local LED	Local LED + remote contact	1 C/O dry contact
Order No.	A9L040xxx	A9L40xxx	Different prefix
Price	Lower	Higher	Due to remote function

Full List of Schneider Surge Protective Devices (Acti9 Series)
Pluggable Type (iPRU / iPRD, Type 2, mainstream)

Series	Model	Imax / In	Uc	Poles	Order No.	Note
iPRU (Basic)	IPRU10‑10KA	10 kA / 5 kA	350 V	1P+N/2P/3P+N/4P	A9L010xxx	Local indication
	IPRU20‑20KA	20 kA / 10 kA	350 V	1P+N/2P/3P+N/4P	A9L020xxx	General Type 2
	IPRU40‑40KA	40 kA / 20 kA	350 V	1P+N/2P/3P+N/4P	A9L040xxx	Your model
	IPRU65‑65KA	65 kA / 30 kA	350 V	1P+N/2P/3P+N/4P	A9L065xxx	High current
	IPRU100‑100KA	100 kA / 50 kA	350 V	3P+N/4P	A9L100xxx	High energy
iPRD (Remote)	iPRD10/20/40/65	Same as iPRU	350 V	1P+N/2P/3P+N/4P	A9L40xxx	With remote dry contact

Fixed Type (iST / iPR, Type 2)

iST series: iST20, iST40, iST65 (Imax 20/40/65 kA), order no. A9L916xxx

iPR series: iPR20, iPR40, iPR65 (older fixed type, gradually replaced by iPRU)

Type 1 / Combined Type 1+2

iPRF1‑12.5r: Type 1, Imax = 12.5 kA (10/350 μs), 3P+N/4P, A9L012xxx

iPRD1‑15r/20r/25r: Type 1+2, Imax = 15/20/25 kA, 3P+N/4P

Special Series

iPRU‑DC: For PV DC systems (500 V / 1000 V DC)

iPTU: For low‑voltage signal lines

EA9L: Easy9 economical fixed type

Cross‑Brand Replacements for IPRU40‑40KA

(Type 2, Imax = 40 kA, In = 20 kA, Uc ≈ 350 V)

Siemens 5SD7 Series

5SD7462‑6CN: 2P, 40 kA/20 kA, 350 V, pluggable

5SD7464‑6CN: 4P, 40 kA/20 kA, 350 V, pluggable

5SD7466‑6CN: 3P+N, 40 kA/20 kA, 350 V, pluggable

ABB OVR T2 Series

OVR T2 2L 40‑320 P U: 2P, 40 kA/20 kA, 320 V

OVR T2 4L 40‑320 P U: 4P, 40 kA/20 kA, 320 V

OVR T2 3N 40‑320 P U: 3P+N, 40 kA/20 kA, 320 V

Chinese Brands (Cost‑effective)

CHINT NU6‑II 40 kA/20 kA: 350 V, 1P+N/2P/3P+N/4P

DELIXI DZ47Y 40 kA/20 kA: 350 V, all poles

ZHONGLI ZL1‑40/2‑350: Type 2, 40 kA/20 kA, 350 V

III. Schneider Internal Replacements

Downsizing: IPRU20‑20KA (Imax = 20 kA), for low surge environments

Equal replacement: iPRD40‑40KA (with remote signal)

Upgrading: IPRU65‑65KA (Imax = 65 kA), higher surge protection

Selection & Replacement Rules
Match core parameters: Imax, In, Uc, Type 2, poles must be consistent
Mounting compatible: 35 mm DIN rail, similar width
Function difference: iPRD / 5SD7 / OVR have remote contacts; iPRU only local indication
System suitable: All for TT/TN‑S, not for TN‑C