3SB 7

Package / Case:	3AB, 3AG, 1/4" x 1-1/4"
DC Cold Resistance:	0.016 Ohms
Size / Dimension:	0.250" Dia x 1.252" L (6.35mm x 31.80mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CE, CSA, PSE, UL
Melting I²t:	372
Breaking Capacity @ Rated Voltage:	200A
Mounting Type:	Holder
Series:	3SB
Response Time:	Slow
Voltage Rating - AC:	250V
Current Rating:	7A
Fuse Type:	Cartridge, Glass
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Fuses

3SB 7 application field and working principle

The 3SB 7 field-selectable fuse series is a current-limiting fast-acting fuse designed for use in industrial control and motor circuit applications. It is a tradition thermal-magnetic fuse that uses both temperature-responsive operation and electrical-responsive operation to protect low voltage equipment from electrical hazards. The 3SB 7 series is made up of two distinct fuses that are connected in an LRU-type housing. The first fuse is a thermal-magnetic fuse with a trip time typically ranging from 0.1 seconds to 500 milliseconds, while the second fuse is an electrical-responsive fuse, typically having a trip time ranging from 1 to 5 seconds. The two fuses are designed to work together in order to maximize the protection of electrical equipment. The 3SB 7 series is available in a wide variety of current ratings from 1–400 A, and can be used in applications ranging from home lighting, industrial machinery, to industrial control systems. Additionally, the fuses are approved for UL, CSA, and IEC standards, making it well-suited for a variety of environments. In terms of working principle, the 3SB 7 series uses a combination of thermal-magnetic and electrical-responsive components that work together to sense and disconnect faults. When an overload current is detected, the trip time of the thermal-magnetic fuse is very short compared to the trip time of the electrical-responsive fuse. This helps to reduce the damage of short-circuit faults and provides prompt protection of the equipment from dangerous currents. The thermal path of the thermal-magnetic fuse helps to limit the arc energy and prevent dangerous over-currents while the action of the electrical-responsive fuse helps to delay the trip time of the circuit breaker.To sum up, the 3SB 7 field-selectable fuse series is a reliable and robust solution for industrial control and motor circuit applications, providing fast-acting and current-limiting protection in a wide range of environments. With its wide range of current ratings and approvals for multiple standards, the 3SB 7 series offers a versatile solution for any application that requires a dependable fuse.

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Part Number	Manufacturer	Price	Quantity	Description