The PLN6 miniature circuit breaker (MCB) is a protective device that’s equipped with both a thermal and an electromagnetic release. The former responds in the event of an overload, while the latter offers protection against short circuits. The 1+N-pole MCB is only 1 HP wide and is available with rated currents from 2 A to 40 A. The switching capacity is 6 kA.
The circuit breaker, which is available with tripping characteristics B and C, is equipped with a red-green contact-position indicator for indicating the device state: green means that the contacts are open, and red that they are closed.
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The PLN4 miniature circuit breaker (MCB) is a protective
device that’s equipped with both a thermal and an
electromagnetic release. The former responds in the event
of an overload, while the latter offers protection against
short circuits.
The 1+N-pole MCB is only 1 HP wide and is
available with rated currents from 2 A to 40 A. The switching
capacity is 4.5 kA. The circuit breaker, which is available with
tripping characteristics B and C, is equipped with a red-green
contact-position indicator for indicating the device state.
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High performance circuit breakers are ideally suited to protect against overcurrent and short circuit for use in aircraft and vehicles and other specialised equipment where safety is paramount. Battery isolation switches are ideally suited for installation in the main battery systems of heavy duty vehicles including tankers, boats, off-road plant and other battery-powered equipment.
High performance circuit breakers feature thermal or thermal-magnetic trip and an extremely high rupture capacity. Battery isolation switches are also based on a thermal-magnetic trip mechanism. The thermal part of the circuit breaker provides delayed protection in the event of overload, the magnetic part disconnects the faulty circuit in the event of overload or short circuit within milliseconds.
Customized High Performance Circuit Breakers such as SG, AP or CBM types are available on request. All products of this group provide genuine physical contact isolation.
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The PLHT miniature circuit breaker is a protective device equipped with both a thermal and an electromagnetic release that is available in 1-, 2-, 3-, 4- and 3+N pole versions. The PLHT is compatible with AC and DC applications up to 60 V with rated currents from 20 A to 125 A and is available with tripping characteristics B, C and D. It has a switching capacity of up to 25 kA.
The PLHT-V is a special 1-pole version of the PLHT miniature circuit breaker for installation in front of the meter in commercial applications. The PLHT-V is compatible with AC and DC applications up to 60 V with rated currents from 20 A to 63 A and is available with a tripping characteristic that is similar to type D. This special version has a switching capacity of up to 25 kA.
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Ideally suited to protect against overcurrent and short circuit of printed circuit boards, semi-conductors and telecommunications equipment.
Circuit breakers with magnetic or hydraulic-magnetic trip mechanism respond extremely fast and provide genuine physical contact isolation. Magnetic trip ensures disconnection of the faulty circuit nearly without delay in the event of short circuit, but also in the event of low overloads. Our models also provide hydraulically delayed switching characteristic required for certain applications.
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The FAZ6 miniature circuit breaker is a protective device equipped with both a thermal and an electromagnetic release that is available in 1-, 2-, 3-, 4-, 1+N and 3+N pole versions.
The FAZ6 is available with rated currents of 0.5 A to 63 A. The switching capacity is 10 kA according to IEC/EN 60947-2 and 6 kA according to IEC/EN 60898-1. A guide for secure terminal connection and a 3-position DIN-rail simplify the installation of the circuit breaker.
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Ideally suited to protect against overcurrent and short circuit of equipment in telecommunications, process control and other industrial applications where sophisticated equipment requires a high precision performance.
A latching type bimetal is combined with a magnetic coil to ensure protection and genuine physical contact isolation. This provides the joint benefits of delayed operation for low level overcurrent protection and fast magnetic action of higher value short circuits, disconnecting the faulty circuit within milliseconds.
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E-T-A not only offers electronic overcurrent protection and thermal or thermal-magnetic circuit breakers, but another type of protection: magnetic and hydraulic-magnetic circuit breakers. What characterises these devices and in which applications are they used?
Circuit breakers and protectors with magnetic or hydraulic-magnetic trip principle are extremely fast and ensure genuine physical isolation. In the event of a short circuit, the magnetic trip mechanism disconnects a defective circuit almost without delay. The circuit is disconnected even at low overloads. The
hydraulic-magnetic trip principle provides an intentional delay in the overload range. You can choose from a wide range of device versions.
The 808 version is a single-pole, polarised circuit breaker with magnetic fast trip mechanism. An uncomplicated switching system ensures eliable disconnection even for the smallest overcurrents. The device can also be used for impulse tripping. The compact design and the fast reaction time are specifically suitable for PCB mounting to protect sensitive electronic components installed there. The device is available with fixed current ratings from 0.01 A to 5 A, which makes this circuit protector highly suitable for fragile loads. Another quality feature is its low temperature sensitivity. Thanks to its extremely compact design of only 30 x 20 x 10 mm (H x W x D) when installed, the 808 version can be mounted on virtually any PCB.
E-T-A’s 8335 circuit breakers for equipment protection are available as single- or multi-pole version with magnetic or hydraulic-magnetic trip principle. They provide toggle actuation, front panel mounting, different characteristic curves and optional auxiliary contacts. The precise switching mechanism ensures reliable disconnection through an independent tripfree mechanism even for the smallest overcurrents.
Like all magnetic devices, they feature low temperature sensitivity at rated load. They are available with a rated current range from 1 A to 50 A and have a very compact design. They are suitable for AC and DC voltages.
The 8335 devices offer economic overcurrent protection for telecommunication applications in the Economy Power-D-Box®. This a a compact power distribution system with only two height units (HU). The redundantly designed rack can be customised with plug-in type magnetic or hydraulic-magnetic 8335 or 8340 circuit breakers.
This product group is very attractive - not only because of the already mentioned benefits of the hydraulic-magnetic circuit breakers - but also because of its many mounting options. Type 8340 and 8340-F devices are available with flange or snap-on mounting. This design version is suitable for the use in the telecommunications / datacom industry. In industrial applications, however, DIN rails are more commonly used. This area is covered by the 8340-T version. The users here appreciate the 8340-T specifically because of its integral auxiliary contacts and the wide temperature range of -40 °C to +85 °C. The 8340-G version is mounted via threadneck. They are normally used e.g. in rail vehicle applications.
When you need a device with many different approvals, the 8345 is the device of choice. With a slim design of only 19 mm, the device can carry rated currents of up to 125 A, which is more than any other device of this product class. It is available with instantaneous, extremely fast or very slow trip curve. It can be extended with additional module options for signalling or remote trip. Thanks to its international approvals, this device can be used in telecommunication applications worldwide and protects the digitisation hardware against damage caused by overcurrents.
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Schurter has a long tradition with circuit breakers. In addition to their thermal release (bimetal), the classic TA35 and TA36 are now optionally equipped with an additional magnetic module, which promises reliable protection within milliseconds in the event of very high overcurrent (short circuit).
Thermal Circuit Breakers
Circuit breakers are usually designed according to the thermal principle with a bimetal. If a defined temperature is exceeded due to overcurrent, the electric circuit is interrupted. Once the bimetal cooled down, the appliance is ready for use again. However, if a short circuit occurs, the bimetal cannot react fast enough. For this reason, thermal circuit breakers are usually combined with a fuse.
Additional Magnetic Module
Schurter is now upgrading its 2-pole classic TA35 and TA36 models with an additional, optional magnetic module. From now on, no additional fuse is required when using a thermal-magnetic type. Depending on the application, the magnetic modules are available either with a slow or a fast acting characteristic.
Both models are designed for snap-in mounting and with finely graduated rated currents. A variety of colours and lighting options make the designer's choice easier. The Schurter TA35 has a more classic style, while its TA36 counterpart comes in a more modern design. A circuit breaker with a short circuit protection is mainly meant for applications, where a full protection on the primary side is required.
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Dive into topics such as the efficient E-Box for enhanced productivity, the speed and power of our magnetic and hydraulic circuit breakers, and best practices for electronic vehicle protection.
READ HERE! E-T-A CURRENT Magazine
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UK distributor of electrical and electronic components.
