Tmax T4 3P/4P MCCB 125A-250A TMA PR221DS-LS/I

Name: Tmax T4 3P/4P MCCB 125A-250A TMA PR221DS-LS/I
Brand: Newtrend or OEM brand
SKU: 1769740503022051328

Brand Name:Newtrend or OEM brand
Place of Origin:China
Model Number:T4S T4H T4L T4V
Rated Frequency (Hz):50/60Hz
Breaking Capacity:50kA, 70kA, 120kA
Rated Voltage:690V
Type:Moulded Case
Poles Number:3

SKU: 1769740503022051328 Category: MCCB Circuit Breaker

Description

Tmax T4S T4H T4L T4V 250 3P 4P 125A 160A 200A 250A TMA PR221DS-LS/I 690V 1000V 1150V MCCB Molded Case Circuit Breaker

Tmax Molded Case Circuit breaker is now available as a complete range of up to 1600 A.

– Manually operated or Electrically operated.

– All available in the Fixed version; T4 and T5 has Plug-in version; T4, T5, T6 and T7 has Withdrawable version as well.

– With the same frame size, the circuit-breakers are available with different breaking capacities and different rated currents.

– IEC or UL standards

Additional information

Weight	4 kg
Dimensions	35 × 35 × 35 cm

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Tmax T4 3P/4P MCCB 125A-250A TMA PR221DS-LS/I.

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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.

Trip Unit Protection

How to choose between Thermal-Magnetic (TMD) and Electronic (Micrologic) trip units?

Thermal-magnetic trip units provide fixed or adjustable bimetallic overload and electromagnetic instantaneous short-circuit protection, ideal for standard industrial power distribution. Electronic microprocessor trip units offer precise digital dials for L (Long-time delay overload), S (Short-time delay short-circuit), I (Instantaneous short-circuit), and G (Ground-fault protection), delivering total time-current selectivity in modern switchgear.

Ics vs Icu Capacity

What is the technical distinction between Ultimate (Icu) and Service (Ics) breaking capacity?

Icu represents the absolute maximum fault current the breaker can safely interrupt, after which inspection or replacement may be needed. Ics represents the operational breaking capacity (50%, 75%, or 100% of Icu) that the breaker can clear repeatedly and remain fully operational without performance degradation. In critical healthcare, data center, and continuous industrial applications, specify breakers with Ics = 100% Icu.

3P vs 4P Neutral

When should a 4-Pole (4P) MCCB be specified instead of a standard 3-Pole (3P) MCCB?

A 4P breaker with a switched neutral is required in systems with dual power sources (generator / utility ATS transfer) to prevent circulating neutral currents, in IT distribution networks, and in commercial installations with heavy non-linear harmonic loads (LED drivers, variable speed drives) where neutral conductor current can exceed phase currents.

Motorized & Remote Operation

How to select manual rotary handles vs motorized electric operating mechanisms?

Direct or extended door rotary handles are specified when the MCCB is enclosed inside switchgear cubicles, providing padlocking and door-interlock safety. Motor operating mechanisms (electric operators) are required for automated SCADA control, remote PLC open/close operations, and automatic transfer switch (ATS) integration.

Terminal & Mounting Options

What terminal connection hardware and mounting configurations are available?

Standard front connection lugs accept copper or aluminum compression terminals and busbar connections. For high-density panel boards, extended spreader terminals, rear connection studs, and plug-in / draw-out base cassettes are available to facilitate rapid maintenance and modular swap-out.