3TF CJX1 Magnetic Contactor (9A-475A)

Name: 3TF CJX1 Magnetic Contactor (9A-475A)
Brand: Newtrend or OEM brand
SKU: 60048482491

Electricity Type:AC
Brand Name:Newtrend or OEM brand
Place of Origin:China
Model Number:3TF
Phase:3
Main Circuit Rating Current:9A ~ 630A

Number of Pole

Main Circuit Rating Voltage

SKU: 60048482491 Category: AC Contactors

Description

3TF 2P 3P 4P 9A 12A 16A 22A 32A 38A 45A 63A 70A 75A 85A 110A 140A 170A 205A 250A 300A 400A 475A 2NO 2NC CJX1 DC AC Contactor

Applications:
3TF power contactors are suitable for switching and controlling squirrel cage and slip-ring motors as well as other AC loads,
such as solenoids, capacitors, lighting loads, heating loads and transformer loads.

Standards:
Contactors conform to IS/IEC 60947-4-1. They also carry the CE mark.

Coordinated feeder:
Contactors and bi-relays have been tested for type-2 coordination at Iq = 50kA, 415V AC, 50Hz as per IS/IEC 60947-4-1, for both
fuse protected as well as fuseless motor feeders.

Range:
Air break contactors are available from 9 A to 475A in 3 pole version.
Also available in 2 pole AC version from 45A to 400A.

Additional information

Weight	2 kg
Dimensions	25 × 25 × 25 cm
Number of Pole	3, 4
Main Circuit Rating Voltage	380V, 240v, 230v, 220v, 120v, 110v, 24v

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for 3TF CJX1 Magnetic Contactor (9A-475A).

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Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.

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2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.

Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

AC-1 / AC-3 Duty

How to calculate contactor rating based on motor power and utilization categories (AC-1 vs AC-3 vs AC-4)?

AC-3 rating applies to standard squirrel-cage motor starting and stopping during normal run (starting current 5–7x In). For non-inductive or purely resistive heating loads, use the higher AC-1 rating. For severe inching, jogging, and plugging applications (AC-4 duty), derate the contactor or upsize by 1 to 2 frame sizes to prevent contact erosion.

Coil Voltage Selection

How to choose the correct control coil voltage, frequency, and electronic wide-voltage options?

Standard AC coils include 24V, 48V, 110V, 220V/230V, 380V at 50/60Hz. For DC control loops or PLC outputs, specify DC coils or electronic wide-range AC/DC coils (e.g. 100V–250V AC/DC) which feature built-in surge suppression, low holding power consumption, and immunity to voltage dips.

Overload Coordination

How to size and coordinate the matching thermal overload relay (TOR) for Type 2 protection?

Select a thermal overload relay whose current setting range straddles the motor full-load current (FLA). Set the dial precisely to 1.0x motor nameplate FLA. For IEC 60947-4-1 Type 2 coordination, pair the contactor and relay with backed-up upstream fuses or fast-acting MCB/MCCB to prevent welding under fault conditions.

Auxiliary & Interlocks

What auxiliary contact blocks and mechanical interlocks can be added for motor reversing?

Units feature built-in 1NO or 1NC auxiliary contacts, expandable with top-mounted 2-pole or 4-pole auxiliary contact blocks (F4 / AX) and pneumatic timer delay blocks. For forward/reverse motor starters or star-delta starter assemblies, add side-mounted mechanical interlock units (MI) with electrical interlocking.

Ambient & Altitude Derating

How do ambient temperature and installation altitude affect contactor performance?

Standard ratings are calibrated for -5°C to +40°C. For ambient temperatures exceeding 55°C or altitudes above 2000m (where reduced air density diminishes heat dissipation and dielectric insulation), derate operational current by 2% per 100m above 2000m and verify insulation voltage limits per IEC standards.