Type 1+2 · Class I+II · 3P+N OSPD 404 B+C Type 1+2 three-phase surge arrester Iimp 25 kA

IEC / EN 61643-11 Type 1+2 · Class I+II Iimp 25 kA Uc 275 V AC

Surge Protection Device

OSPD 404 — B+C TYPE 1+2 · IIMP 25 KA

AC surge arrester for low-voltage distribution — Class B+C / Type 1+2 (I+II), 3P+N for TT networks at the LPZ 0–1 boundary. High-energy MOV cores with thermo-dynamic disconnector, fault window and remote signalling.

SPD Class

I+II / T1+T2

IEC/EN 61643-11 · DIN VDE class B

Topology

3P+N

TT · Un 220/380 V AC · 50/60 Hz

Iimp / In

25 / 25kA

L–N branches · 10/350 & 8/20 µs (see specs)

Protection level Up

≤1.5kV

TT coordination · submittal data

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Manufacturer direct — no intermediaries. Ships from Izmir, Turkey worldwide.

OSPD 404 is ORBITAL's catalogue designation for a Type 1+2 / Class I+II (B+C) surge arrester in 3P+N form for TT low-voltage networks. It is intended for the LPZ 0–1 lightning protection zone boundary — where direct or very high-energy surge threats must be clipped before energy propagates into internal installation zones.

Published protection modes cover L1, L2, L3–N and N–PE. The design uses high discharge-capacity metal oxide varistor (MOV) cores with a thermo-dynamic control disconnector, mechanical status window (green: OK · red: replace) and remote signalling for supervisory integration.

Technical documentation: Electrical architecture follows IEC/EN 61643-11 Type 1+2 (Class I+II) practice for this 3P+N TT topology. Dimension, wiring and parameter tables on this page reflect our approved datasheet; CAD-ready excerpts ship with quotations on request.

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Type 1+2 · Class B+C duty

Combined lightning-current and surge-current capability for primary panels at the LPZ 0–1 interface.

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3P+N · TT networks

Three-phase TT boards at nominal 220/380 V with continuous operating voltage Uc = 275 V AC on L–N branches.

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25 kA impulse capability

Iimp 25 kA (10/350 µs) on L–N branches per datasheet, with high N–PE branch capability — see Technical tab.

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Remote signalling

Remote contact for fault indication — convenient for panel alarms and BMS integration.

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IEC/EN 61643-11 · TÜV reference

Documented Type 1+2 parameters for submissions; certification evidence supplied with project documentation when required.

Model coding, dimensions and internal circuit graphics illustrate the product construction. Electrical parameters in the table summarise the approved datasheet.

Coding

OSPD 404 model nomenclature diagram — designation breakdown — Model code nomenclature — poles, protection class, Uc and remote contact option fields.

Dimensions & circuit

OSPD 404 dimensions and internal circuit diagram — four-pole module — Outline dimensions and simplified internal circuit — four-module 3P+N arrangement.

Electrical parameters

Electrical parameters
Model designation	OSPD 404 · equivalent industry designation FV25B/3+NPE family (variant suffix per order code)
SPD protection standard	IEC 61643-11 / EN 61643-11 — Type 1+2
SPD installation type standard	IEC 61643-11 / EN 61643-11 — Class I+II
Protection level (VDE)	DIN VDE 0675-6 — Class B
Type of network	TT
Protection mode	L1, L2, L3–N · N–PE
Nominal voltage Un	220/380 Vac · 50/60 Hz
Maximum continuous operating voltage Uc	275 Vac · 50/60 Hz
Short-circuit withstand capability Isccr	25 kA
Continuous operating current IC	< 20 µA
Rated load current IL	315 A
Residual current IPE	≤ 20 µA dc · ≤ 500 µA ac
Standby power consumption PC	≤ 25 mVA
Follow current extinguish capability Ifi — L–N	≥ 25 kA_rms
Follow current extinguish capability Ifi — N–PE	≥ 100 A_rms
Nominal discharge current In (8/20 µs) — L–N	≥ 25 kA
Nominal discharge current In (8/20 µs) — N–PE	≥ 100 kA
Impulse discharge current Iimp (10/350 µs) — L–N	≥ 25 kA
Impulse discharge current Iimp (10/350 µs) — N–PE	≥ 100 kA
Voltage protection level Up	≤ 1.5 kV
Isolation resistance Risol	> 1000 MΩ
Response time tA	≤ 100 ns
Energy let-through note	Remaining energy after operation < 151 J (coordination test context per datasheet)
Temporary overvoltage UTOV	≥ 440 V (±1%) / 120 min
Remote control contact	Yes
Disconnection indicator	Mechanical — green OK / red replace
Mechanical & environmental
I/O connections	Screw terminal 10–35 mm² · connection bus option
Installation location	Inside
Mounting type	Symmetrical DIN rail (EN 50022 / DIN 46277-3)
Colour	Grey
Degree of protection	IP20
Housing material	UL94 V-0
Ambient temperature	−40°C · +80°C
Altitude	≤ 2000 m amsl
Permissible humidity	30%–90%

Mounting

Mount OSPD 404 on a symmetrical DIN rail inside the switchgear enclosure (indoor, IP20 module). Position at the intended LPZ 0–1 boundary per the risk assessment; keep cable bends generous and maintain separation from unrelated sensitive bundles.

Conductors & torque

Terminate line, neutral and PE per the Coding diagram using conductors within the rated range (10–35 mm² as published). Tighten screws to manufacturer torque; poor terminations increase residual voltage and heating.

Earthing & coordination

Bond the PE branch to the installation equipotential bar with a short, low-inductance route. Coordinate with upstream/downstream SPDs and external LPS per project risk assessment — SPD performance depends on bonding quality.

Inspection & replacement

During periodic maintenance, verify the mechanical indicator (green OK / red replace). Check remote signalling continuity if monitored. Replace modules after indication or following severe surge events per owner engineering policy.

OSPD 404 TT network wiring example — three-phase SPD with backup protection

Typical TT application schematic — retain fuse ratings, conductor sizing and torque per final project drawings.