It is the function to clean the contact area. When switching on and off, the contact tip slides across the contact area from the contact point contact to the magnetic contact point.

It is the function that momentarily flicks off the contact tip by the force of the return spring and the principle of leverage when switching off. This speeds up the contact disconnection and reduces wear and tear on the contact points due to circuit interruption.

The Bestact is electrically energized at two points, the contact point and the magnetic contact point, preventing contact failures with small loads.

The contact tip (head part) is pressed against the glass tube by the force of the return spring. Improves vibration and shock resistance even when there is no excitation to the coil.

It is a device that opens and closes a valve (valve) by placing a movable piece of iron called a plunger inside a coil of conductive wires wound in a cylindrical shape called a solenoid, and by applying an electric current to the coil, the plunger is operated.

It is a switch in which two magnetic leads are enclosed in a glass tube filled with inert gas, and the electric contacts of the magnetic leads are switched on and off by an external magnetic field.

It is the path of the magnetism that flows through the reed switch when it is operated. While most reed switches share the same magnetic contact and current-carrying parts, Bestact separates each of these parts to ensure stable operation.

It is the path of electricity that flows through the reed switch when it is operated. To promote the formation of a glow discharge when breaking an inductive load, Bestact has a contact part separate from the magnetic contact part. Contact starts at the contact part first when switching ON, and when switching OFF, the contact part separates the electric circuit at the end.

It is the type of electric discharge that occurs when the load is shut off in the glass tube. General reed switches generate arc discharges when shutting off a load, which tends to cause significant wear and tear on the contact parts. On the other hand, Bestact shuts off by glow discharge, which shortens the shutoff time and reduces wear and tear on the contacts, resulting in a long service life.

It is a chemically stable gas that does not readily react with other elements.

This is the force that pushes the contact tip (head part) against the glass tube by the return spring's restoring force.

It is the force received by the contact part just before the magnetic contact part makes contact when switching ON, at the moment when only the contact part makes contact. This value is the difference between the spring force of the contact part and the restoring force of the return spring.

It is the force received by the contact part when the contact part and the magnetic contact part are completely closed.

It is the standard voltage for insulation design and is the maximum switching voltage at which withstand voltage failure does not occur even after long-term use. It differs from breakdown voltage, which is an index of insulation performance.

It is the maximum switching current value at which the specified electrical switching durability can be expected when used under the rated switching voltage with the specified load and switching frequency.

It is a generic term for loads in which coils are used, such as motors, transformers, solenoids, etc. When there is an inductive load in a circuit, a high reverse induced electromotive voltage is generated when the circuit is shut off, and the contact part is subjected to high wear and tear due to arcing.

When an inductive load is connected to a DC power supply, the current increases at a constant rate, then the rate slows and finally saturates. The time constant is defined as the time required to reach 63.2% of the saturation voltage, and is an indicator of the time required to reach saturation. When the resistance of the inductive load is R[Ω] and the reactance is L[H], the time constant τ[s] is calculated by L/R.

When an inductive load is connected to an AC power supply, current flows in a phase lagging behind the power supply voltage waveform. The cosine cosθ of this phase difference θ is called the power factor, and the power consumed by the load is voltage (RMS value) × current (RMS value) × cosθ. When the power supply frequency is f[Hz], the resistance of the inductive load is R[Ω], and the reactance is L[H], it is calculated by cosθ=R/√{r^2+(2πfL)^2}.

Indicates the smallest current that can be guaranteed for a given contact reliability (5 × 10-8th power/cycle) in voltage DC5V.

It is an indicator of the frequency of contact failure. While general systems, devices, and components are expressed in terms of the number of failures per unit time, contact failures are expressed in terms of (/times) because contact failures occur mainly due to the number of operations rather than the operating time.

Refers to a reliability level of 60% and indicates that a true failure rate is present at a probability of 60% for the indicated failure rate.

Fit refers to the failure rate per hour. Generally, the failure rate of reed switches is specified by the number of operations.

It is an index of insulation performance between conductors or between conductors and the ground, and its unit is ohm. In the case of relays, there are three types: between contacts, between contacts to ground, and between contact poles.

It is a generic name for an insulation resistance tester, a measuring instrument used to determine how much insulation resistance a device has.

Contact resistance when shipped.

The Pull In value in our catalog is the product of the current flowed when the contacts operate in the test coil and the number of coil turns.

The Drop Out value in our catalog is the product of the current flowed when the contacts operate in the test coil and the number of coil turns.

It is a standard coil for measuring contact characteristics in our catalog. It has a wire diameter of 0.2 mm, 3000 turns, a coil inner diameter of 10.5 mm, and a length of 33.5 mm.

The operate time in our catalog refers to the time from the time the contacts are activated at 150% of the Pull In value in the test coil to the time the contacts are operated.

The recovery time in our catalog refers to the time it takes for the contact to recover when the excitation is released after the contact is activated at 150% of the Pull In value in the test coil to which the flywheel diode is connected.
※The flywheel diode is connected to protect the instrument. Although the effect of the back EMF of inductive loads can be suppressed, the shut-off duration is extended by several ms.

It is a phenomenon in which the contact parts collide with each other minutely due to the kinetic energy of the contact after contact operation, and repeat ON and OFF.

An inductive load such as a coil stores energy proportional to the reactance of the coil and the square of the current value while energized, and releases this energy when the current is interrupted, generating a back electromotive force. A method in which a diode is inserted in parallel with the coil and energy is consumed by the resistance of the coil and the diode is called a flywheel diode. While the effect of the back electromotive force of the inductive load can be suppressed, there is also a disadvantage that the interruption time becomes longer.

Please evaluate the product in the environment used by the customer and confirm that there is no problem with the actual device before use.

Contact resistance may temporarily increase if wear particles from the magnetic contacts become entangled in the contact part. For this reason, we recommend a mounting position where the contact part is not located directly below the magnetic contact part.

Cutting 10 mm on each side increases Pull In value by approximately 10-20% and Drop Out value by approximately 20-30%. However, when determining the cutting length for mass production, it is necessary to actually cut the terminals and evaluate the resulting effect.

Due to the auxiliary magnetic gap, which differs from that of general reed switches, the Bestact has a tendency to operate OFF in the middle of the ON range due to the characteristics of the permanent magnet, and is not recommended for long-axis operation.

There are two major reasons for specifying the polarity of Bestact. One is that, unlike general reed switches, Bestact contacts are designed to easily generate glow discharge when an inductive load is shut off. The other reason is that the cathode and anode are made of different metal materials to prevent contact transition.

When an inductive load is shut off with reverse polarity, the discharge changes from glow discharge to arc discharge. Arc discharges tend to have high energy and a long shut off time, resulting in localized contact wear and failure to meet the product life expectancy.

Based on simulation results, it is considered that it can be used up to 100MHz without any problem. However, please evaluate in an actual circuit when applying this product.

The maximum Carry current for Type: BRE-13153A is 13A and for Type: BRG-07100A is 10A.

The test condition is that the temperature rise at the glass tube sealing area is 125°C or less.

Impulse-waveform 1.2/50μs Noise tolerance at three times of positive/negative application differs depending on the product. 2500V between contacts for BRE-13153A and BRG-07100A.

Lightning surge-proof strength of 1.2×50μs differs depending on the product. BRE-13153A and BRG-07100A are 2500V between contacts.

BRE-13153A, BRG-07100A is approximately 1.0ms.

The standard values are 0.5 mm for BRE-13153A and 0.2 mm for BRG-07100A.

The specifications take into account the effect of counter-electromotive voltage caused by inductive loads.

When the Bestact is OFF state, the return spring presses the contact tip (head part) against the glass tube so that it is stable against vibration and shock. In order to increase the range of motion of the return spring, the movable side is divided into two parts, and the shape is devised so that the magnetic flux can pass sufficiently through the air gap between the two parts.

Copper is included as AgCuO in the contact material and Ep-Fe/Cu2Sn3 in the terminal plating.

Bestact separates the magnetic contact part from the contact part, so that the contact part is made of a material suitable for large-capacity switching and has a spring structure with a large distance between contacts, while the magnetic contact part is made of a material with excellent wear resistance to withstand shocks when shutting the circuit.

Current also flows through the magnetic contact parts due to the structure. This contributes to improved contact reliability.

Time constants of 10 ms are mechanical relays, 40 ms are small DC contactors and power relays, and 100 ms are solenoid valves, solenoids, and small clutches and brakes.

If the time constant exceeds the specified value (100ms for BRE-13153A, 40ms for BRG-07100A), arcing will occur and the shut off time will increase, resulting in severe contact wear. In such cases, it may be possible to add noise-resistant components such as varistors in parallel with the load, so please consult us.