Magnetic Contactors

Magnetic Contactor Price in Pakistan 2026 — Buyer's Guide

A magnetic contactor is the workhorse switching device in every industrial motor circuit, every star-delta starter, every pump-control panel, every HVAC chiller, and most commercial lighting installations. Its job: switch a heavy load (typically a motor) under remote control from a small low-current signal — usually a 220 V AC coil that pulls in the main contacts when energised. CNC stocks the CJX2s series in 14 amperage variants from 12 A to 160 A, priced from Rs. 2,000 to Rs. 41,600.

Every CNC magnetic contactor carries IEC 60947-4-1 compliance, AC-3 utilisation category (motor starting duty), silver-cadmium-oxide contact tips for 1 million+ operations under rated load, and a 5-year warranty. Stocked locally in Lahore for same-day dispatch nationwide.

CNC CJX2s Magnetic Contactor Price Table — Pakistan 2026

Free delivery across Pakistan. 5-year warranty on all CNC magnetic contactors. Coil voltage options: 220 V AC (standard), 24 V DC, 48 V DC, 380 V AC. Bulk & dealer pricing — WhatsApp +92 326 1111376.

What Is a Magnetic Contactor?

A magnetic contactor is an electromechanical switch designed specifically for switching motor loads. Three components do the work:

• The electromagnet coil: a small low-current solenoid (typically 220 V AC, draws 50-200 mA) that pulls in when energised. The coil is the control input — energised by a pushbutton, PLC output, timer relay, thermostat, or float switch.
• The main contacts: three large copper-tipped poles that close when the coil pulls in, connecting the motor to the supply. Rated for the motor's full-load current and starting inrush.
• The auxiliary contacts: one or more smaller contacts (typically labelled NO/NC — normally open / normally closed) used for control circuits — pilot lamps, holding circuits, interlocks with other contactors.

The contactor is what makes "remote motor control" possible. A simple push-button at the operator station energises the coil; the contactor closes and the motor runs; release the button (or trip a thermal overload) and the motor stops. Every star-delta starter, every DOL (Direct-On-Line) starter, every reverse-forward control panel is built around magnetic contactors.

Magnetic Contactor vs Relay — What's the Difference?

Rule of thumb: anything over 10 A continuous load needs a contactor; anything below that can use a relay. For 3-phase motor switching, always use a contactor regardless of motor size — the AC-3 contact rating handles motor inrush (which is 6-8× run current for the first 100-200 ms).

3-Phase Magnetic Contactor Wiring Diagram

The standard DOL (Direct-On-Line) 3-phase contactor wiring follows this pattern:

Basic DOL circuit:

1. Power: incoming MCB → L1/L2/L3 terminals → contactor → T1/T2/T3 → motor U/V/W
2. Control: 220 V live → NC button (Stop) → NO button (Start) [paralleled with auxiliary NO 13-14 for holding] → A1 coil → A2 → neutral
3. Thermal overload relay (e.g. CNC JR28S) is wired between contactor T1/T2/T3 and motor U/V/W, with its NC contact wired into the control circuit to trip the contactor on motor overload

For star-delta or forward-reverse control, two or three contactors are mechanically and electrically interlocked. The auxiliary NC contacts of each contactor disable the others' coils — preventing both forward and reverse contactors from energising simultaneously (which would short-circuit the supply).

What Does a Magnetic Contactor Look Like? — Symbol & Identification

The IEC 60617 schematic symbol for a magnetic contactor shows three vertical lines (the main poles) crossed by a small inclined arrow or rectangle (the coil link), with the coil drawn separately as a rectangle labelled K1, K2 (relay terminology) or KM1, KM2 (motor-control terminology).

Physically, a magnetic contactor is identifiable by:

• A black or grey plastic body (CJX2s series is black)
• Three pairs of large terminal screws on top (input L1/L2/L3) and bottom (output T1/T2/T3)
• Two smaller terminals on the side or front for the coil (A1/A2)
• Optional auxiliary contact blocks clipped to the front (NO/NC modules)
• An audible "click" when the coil energises and the contacts close
• DIN-rail or panel-mount with 4 screw holes

Sizing a Magnetic Contactor for Your Motor

Match contactor rating to motor full-load current (FLC), with a safety margin for AC-3 motor duty:

Always pair the contactor with a matching JR28S thermal overload relay for motor protection. The thermal relay's NC contact wires into the contactor's coil circuit, tripping the contactor on motor overload.

Top Picks by Use Case

Best for Small Pump / Geyser / Fan (≤ 5 HP): CJX2s-1210. Rs. 2,000 — 12 A rating handles motors up to 5.5 kW. Most-sold size for residential and small-shop applications. View product →

Best for 2-Ton AC / Mid Pump (5-10 HP): CJX2s-2510. Rs. 2,500 — 25 A rating, 11 kW at AC-3. View product →

Best for Tube-Well / Compressor (15-25 HP): CJX2s-4011. Rs. 4,200 — 40 A rating, 18.5 kW. Bulk size for irrigation and small industrial. View product →

Best for Factory Main / Large Motor (40-50 HP): CJX2s-8011. Rs. 9,500 — 80 A rating, handles 37 kW. View product →

Best Thermal Overload Companion: JR28S 9-13 A or 17-25 A. Rs. 1,450-2,150 — pair with appropriate CJX2s contactor. View product →

CNC vs Schneider vs Chint vs LS vs Togami — Brand Comparison

CNC sits in the imported-value tier with the longest warranty (5 years) — substantially cheaper than Schneider/LS/Togami for equivalent specifications. The CJX2s series uses the same AgCdO contact material as the European premium brands; the difference is brand premium and full traceability of the European supply chain.

Installation & Wiring

1. Switch OFF the upstream MCB / MCCB and lockout-tagout. Verify dead with a voltage tester.
2. Mount the contactor on the DIN rail or panel with the 4 fixing screws. Allow 30 mm clearance on each side for air cooling.
3. Connect the line terminals (L1, L2, L3) to the upstream MCB output. Torque to 2.5-3 Nm for sizes ≤ 32 A; 4-6 Nm for 40-80 A; 8-12 Nm for 100 A+.
4. Connect the load terminals (T1, T2, T3) through a JR28S thermal overload relay to the motor U/V/W terminals.
5. Connect the coil terminals (A1, A2) to the control circuit. A1 = live; A2 = neutral. The start/stop pushbutton circuit interrupts A1.
6. Verify the coil voltage matches the supply (printed on the coil — 220 V AC, 380 V AC, 24 V DC, etc.).
7. Restore upstream power. Press start — listen for a clean "click" with no buzz. A buzzing coil indicates wrong voltage (too low) or worn contact tips.

Common Issues & Troubleshooting

• Contactor buzzes loudly: coil under-voltage or shorted turn. Measure coil voltage; should be 85-110% of rated. Below 85%, contactor won't fully pull in.
• Contactor sticks closed (won't drop out): welded main contacts. Replace the contactor — repair is not safe.
• Contactor trips repeatedly: motor overload (check JR28S setting), single-phasing (broken supply phase), or motor mechanical issue.
• Coil burns out: wrong coil voltage rating, or sustained over-voltage. Always order coil to match control supply.
• Pitted / worn contacts: normal wear under AC-3 duty. Lifespan typically 1-3 million operations. Replace contactor when audible click becomes weak or motor starting becomes uneven.

Bulk & Dealer Pricing

CNC CJX2s magnetic contactors and JR28S thermal relays are stocked locally in Lahore with same-day dispatch nationwide. Bulk pricing for panel builders, electrical contractors, and OEMs assembling motor-starter cabinets. Coil voltage customisation (24 V DC, 48 V DC, 110 V AC, 110 V DC) on order with 3-5 day lead time. WhatsApp +92 326 1111376 with quantity and coil voltage specification.