Magnetic Contactor LC1D25B7 TeSys D - 3P(3 NO) - AC3 - Schneider Electric

The Schneider Electric LC1D25B7 is a 3-pole TeSys D (TeSys Deca) magnetic contactor rated 25 A in AC-3 duty at up to 440 V, fitted with a 24 V AC 50/60 Hz control coil. It is one of the most widely specified contactors in motor starter panels for pumps, compressors, fans, and general machinery across the UAE and GCC, switching motors up to 11 kW at 380–440 V.

Quick Specs – LC1D25B7

• Range: TeSys D / TeSys Deca – reference LC1D25B7
• Poles: 3P (3 NO main contacts)
• Rated current: 25 A (AC-3, ≤440 V) / 40 A (AC-1)
• Motor rating: 11 kW at 380/415/440 V, 50/60 Hz
• Coil voltage: 24 V AC, 50/60 Hz (suffix B7)
• Built-in auxiliary contacts: 1 NO + 1 NC
• Mounting: 35 mm DIN rail or panel screw fixing
• Connections: screw clamp terminals, IP20 finger-safe
• Standards: IEC 60947-4-1, UL 508, CSA, CCC
• Genuine Schneider Electric stock – fast dispatch across the UAE and GCC
• Coil voltage and compatibility checked by our team before every shipment

Applications & Compatibility

The LC1D25B7 is used in direct-on-line (DOL) and star-delta motor starters, HVAC plant, water pumps, air compressors, conveyor drives, and lighting or heating load switching (where its higher 40 A AC-1 rating applies). The 24 V AC coil makes it the standard choice for panels using a 24 V control transformer — common in machine builder and OEM control circuits.

For a complete motor starter, pair it with an LRD-series thermal overload relay (for example LRD21 for 12–18 A or LRD22 for 16–24 A motor current), which mounts directly beneath the contactor. Front and side-mount LADN auxiliary contact blocks can be added if you need more than the built-in 1 NO + 1 NC signalling contacts. For reversing duty, use the LC2D25 reversing pair instead of two separate units.

Why Buy From Electrical Junction

We are a Dubai-based switchgear distributor with a physical trade counter — you can collect the LC1D25B7 the same day or have it dispatched across the UAE and GCC. Every contactor we ship is genuine Schneider Electric, and because coil voltage is the single most common ordering mistake with TeSys D references, we verify the coil suffix against your control circuit before dispatch. International and bulk inquiries are handled directly by our in-house engineer, and our own sourcing arm in Mumbai keeps restocking fast and pricing competitive.

Frequently Asked Questions

What does the B7 in LC1D25B7 mean?

B7 indicates a 24 V AC 50/60 Hz control coil. This is the voltage of the coil circuit that switches the contactor — not the motor supply voltage. If your control circuit is 24 V DC, you need the LC1D25BD instead; the AC and DC coil versions are not interchangeable.

What motor size can the LC1D25B7 switch?

The LC1D25B7 is rated for motors up to 11 kW (15 HP) at 380–440 V, 3-phase, in AC-3 utilisation category, corresponding to 25 A operational current. For resistive loads (AC-1) such as heating, it can carry up to 40 A.

Does the LC1D25B7 include auxiliary contacts?

Yes — one normally open (1 NO) and one normally closed (1 NC) auxiliary contact are built in. Additional LADN auxiliary contact blocks can be front- or side-mounted if your control scheme needs more signalling contacts.

Which overload relay fits the LC1D25B7?

Schneider LRD-series thermal overload relays mount directly onto the LC1D25 frame. Select the LRD reference by your motor's full-load current — for example, LRD21 covers 12–18 A and LRD22 covers 16–24 A. Our team can confirm the correct overload for your motor nameplate before you order.

What is the difference between the AC-3 and AC-1 ratings?

AC-3 (25 A) is the rating for switching squirrel-cage motors, where the contactor must make high starting currents. AC-1 (40 A) applies to non-inductive or slightly inductive loads such as resistive heating. Always size a motor-duty contactor by its AC-3 rating.