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Brand: Hager
Hager SPB440D 4P Type 2 Surge Protection Device 275 V 40 kA
Description
Type 2 surge protection for three-phase four-wire distribution boards
The Hager SPB440D is a four-pole Type 2 surge protection device (SPD) for low-voltage distribution boards. It is designed for TN-S and TT networks and is built in a 3P+N configuration, with the neutral position on the left. Type 2 devices are installed in the main or sub-distribution board to divert switching and induced lightning surges before they reach sensitive equipment downstream.
The datasheet gives a nominal discharge current of 20 kA and a maximum discharge current of 40 kA (8/20 microsecond wave), a continuous operating voltage Uc of 275 V and a voltage protection level of 1.35 kV line to neutral and 1.6 kV line to earth. The device conforms to IEC/EN 61643-11.
Technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / order code | Hager / SPB440D |
| Product description | Surge Protection Device 4P T2 TNS/TT Uc 275V In 20kA Imax 40kA |
| Type / standard | T2 / IEC/EN 61643-11 |
| Configuration | 3P+N, neutral on left |
| Continuous operating voltage Uc | 275 V |
| Nominal voltage | 240 – 415 V AC +/-10% |
| Nominal discharge current In | 20 kA |
| Maximum discharge current Imax | 40 kA |
| Voltage protection level Up L-N / L-PE / N-PE | 1.35 kV / 1.6 kV / 1.5 kV |
| Follow current interrupting rating | 0.1 kA |
| Short-circuit current rating Isccr | 25 kA |
| TOV behaviour L-N | 350 V AC 5 s withstand; 460 V AC 120 min safe failure |
| TOV behaviour N-PE | 1200 V AC 200 ms withstand |
| Backup protection, parallel / series fuse | 125 A / 80 A gG |
| Rated load current IL | 80 A |
| Network types | TN-S, TT (not TN-C, TN-C-S, IT or DC) |
| Status indication | Optical indicator lamp; no remote contact |
| Conductor cross-section, solid / flexible | 1.5 – 35 mm2 / 1.5 – 25 mm2 |
| Tightening torque | 3 – 4.5 Nm |
| Ingress protection / class | IP20 / class II insulation |
| Temperature range | -40 to 80 °C |
| Mounting | DIN rail, indoor, 4 modules |
| Dimensions H x W x D | 89.8 x 71 x 65.7 mm |
| Housing | Polyamide, light grey RAL 7035 |
| Environmental | Halogen free; RoHS conform; REACh-SVHC free |
Network suitability and backup protection
The datasheet marks the device as suitable for TN-S and TT systems only. For TN-C, TN-C-S, IT or DC supplies a different product is required. The SPD needs an upstream overcurrent device: Hager lists a maximum of 125 A for a parallel connection and 80 A for a series connection, both gG fuse characteristics, which should be checked against the board design and local wiring rules.
Installation notes
Keep the connection leads to the busbar and earth as short as possible, because lead inductance adds to the voltage seen by the load. The indicator lamp shows whether the protection modules are still active; the SPD has no remote signalling contact, so it needs periodic visual checks. Surge protection coordination with Type 1 devices or with equipment-level protection should follow the manufacturer’s guidance. For general guidance, compare with the Schneider Electric iQuick PRD40r surge protective device listing.
Documents and quotation
The attached Hager datasheet is the source of the values shown. Send the order code, the network type and the board arrangement for a quotation. More protective devices are in the circuit breakers category.
Datasheets & Documents
- Datasheet Hager SPB440D product datasheet (EN) Download
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About brand
Hager Group is a German family-owned maker of electrical installation systems, founded in January 1955 in Ensheim, Saarland, by Peter Hager with his sons Oswald and Hermann. It first made meter and distribution boards and opened its first French plant in Obernai, Alsace, in 1959. The group is headquartered in Blieskastel, Germany, and still controlled by the Hager family.
Seven Star LLC is an independent supplier in Muscat. We list Hager protective devices for panel builders and contractors in Oman and the GCC.
Hager company profile
| Founded | January 1955, Ensheim, Saarland, Germany |
|---|---|
| Founders | Peter Hager with his sons Oswald and Hermann |
| Headquarters | Blieskastel, Germany |
| Ownership | Hager family |
| First products | Meter and distribution boards |
| Product families | Miniature circuit breakers, RCDs and RCBOs, h3+ moulded-case circuit breakers, consumer units and distribution boards, enclosures, surge protection, KNX and building automation, EV chargers |
Milestones
- 1955: Hager is founded in Ensheim.
- 1959: The first French plant opens in Obernai.
- 2025: Hager marks 70 years.
Hager product series
Modular devices include the NBN106A 1P B-curve 6 A miniature circuit breaker, the CDC264J 2P 63 A 30 mA Type AC RCCB, the SPB440D 4P Type 2 surge protection device and the ESC125 25 A modular contactor.
Moulded case circuit breakers include the HHS063DC h3+ P160 63 A, the HHB250Z x250 250 A thermal-magnetic MCCB, the HET250JR h3+ P250 with LSI electronic trip and 70 kA breaking and the HMT251GR h3+ P250 four-pole LSnI electronic MCCB.
MCB curves set the magnetic trip: B for resistive loads and long cables, C for general use and D for motors and transformers. Electronic MCCB trip units such as LSI and LSnI allow long time, short time, instantaneous and neutral settings to coordinate with downstream devices.
Where Hager devices are used
Final distribution boards, main and sub-main panels, building services and commercial and industrial installations.
Hager products we list
Ordering Hager devices: what we need
Send the Hager reference, or the rated current, poles, curve or trip unit, breaking capacity and accessories required.
Facts checked against Hager Group's own history pages (hagergroup.com), October 2026.
Browse Hager products by category: Circuit Breakers.
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Frequently Asked Questions
What networks is the SPB440D suitable for?
TN-S and TT systems. The datasheet marks TN-C, TN-C-S, IT and DC networks as not supported.
What are In and Imax?
The nominal discharge current In is 20 kA and the maximum discharge current Imax is 40 kA.
What voltage protection level does it give?
1.35 kV line to neutral, 1.6 kV line to earth and 1.5 kV neutral to earth.
Does it have a remote signalling contact?
No. It has an optical indicator lamp only.
What backup fuse is specified?
A maximum of 125 A gG for parallel connection or 80 A gG for series connection.
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