ST1R508B Allicdata Electronics
Allicdata Part #:

ST1R508B-ND

Manufacturer Part#:

ST1R508B

Price: $ 0.00
Product Category:

Circuit Protection

Manufacturer: US Sensor/Littelfuse Inc
Short Description: ICL 1.5 OHM 20% 8A 19.81MM
More Detail: Inrush Current Limiter 1.5 Ohms ±20% 8A 0.780" (19...
DataSheet: ST1R508B datasheetST1R508B Datasheet/PDF
Quantity: 1000
Lead Free Status / RoHS Status: Lead free / RoHS Compliant
1 +: 0.00000
Stock 1000Can Ship Immediately
$ 0
Specifications
Series: ST
Packaging: Bulk 
Lead Free Status / RoHS Status: --
Part Status: Active
R @ 25°C: 1.5 Ohms
Tolerance: ±20%
Current - Steady State Max: 8A
R @ Current: 600 mOhms
Diameter: 0.780" (19.81mm)
Lead Spacing: 0.300" (7.62mm)
Approvals: --
Description

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Inrush Current Limiters (ICL), such as ST1R508B, are instrumentation supportive components that are designed to protect circuit components from being damaged by an excessive surge of inrush current. A typical example of inrush current is during the startup of electrical equipment, when all the components are activated simultaneously and cause a high peak current. Despite the short period of time, the peak current can be enough to cause components to overheat and damage them permanently. That is why it is so important that any circuit system must be protected by some kind of current limiting device.

ST1R508B is a robust, single-phase, adjustable-current, Inrush Current Limiter. It’s max current is 40AE, but the output depends on the adjustment, which ranges from 0 to 40AE. It features superior surge-withstand capability, allowing it to be tolerant to fast repetitive surges and spikes. It is designed to minimize the available fault current of various types of power systems, such as AC/DC power supplies, personal computers, medical equipment, automotive equipment, motor-driven appliances, and others.

The basic operating principle of this ICL is quite simple. ST1R508B’s integrated subject circuit detects the level of the initial inrush current and limits it, while lowering the input voltage. This prevents high peak currents from occurring on startup, protecting the circuit components from possible electric shock or damage due to excess current. The integrated variable gate control keeps the current low until the peak is passed and the system is able to stabilize. This ensures that the system is able to restart automatically, even after a large peak current.

When installed, ST1R508B provides an adjustable current-limiting feature. Up to 40Axmaximum inrush current can be constantly limited based on the level of adjustment provided. The whole process does not require a separate fuse or circuit breaker to guard against catastrophic overcurrent-related hazards. Furthermore, its metal film resistors and built-in thermistor fuse assures excellent environmental durability, temperature stability, and reliability.

In conclusion, the ST1R508B series is a great example of Inrush Current Limiter design. Its adjustable current limitation feature and build-in safety features make it an ideal choice for many application scenarios. It provides outstanding surge-withstand capability and performance, making it an excellent choice for protecting sensitive electrical systems against damaging inrush current. Moreover, its small and compact size makes it an ideal choice for space-saving designs. All these advantages make it a great choice for many different application fields.

The specific data is subject to PDF, and the above content is for reference

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