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  • Over Current Circuit Protection

  • When a circuit must be protected from overvoltage and there are failure modes in the power supply that can produce such overvoltages, the circuit may be protected by a device commonly called a crowbar circuit. When this device detects an overvoltage it causes a short circuit between the power supply and its return. This will cause both an immediate drop in voltage (protecting the device) and an instantaneous high current which is expected to open a current sensitive device (such as a fuse or circuit breaker). This device is called a crowbar as it is likened to dropping an actual crowbar across a set of bus bars (exposed electrical conductors).

Category Part Number

RHEF400S

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 4A HOLD

RGEF1100-1

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 11A HOLD

TRF250-120T-RA-B-0.5

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 0.12A HOLD

AHRF1000-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 10A AMMO

TRF250-120T-RF-B-0.5

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 0.12A HOLD

AHRF1300S

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 13A HOLD

RGEF300K-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 3A HLD AMMO

RGEF900K-2

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 9A HLD T/R

RGEF700K-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 7A HLD AMMO

AHRF600-1

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 6A HOLD

AHRF1000S

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 10A HOLD

AHRF600-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 6A HLD AMMO

RHEF600-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 6A AMMO

RGEF300-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 3A HLD AMMO

AHRF750-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 7.5A AMMO

TRF250-180US-2

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 0.18A HOLD

TRF250-180US

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 0.18A HOLD

TRF600-150-R2-B-0.5

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 0.15A HOLD

TAC170-09F

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 1.7A STRAP

RGEF300-1

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 3A HOLD

VTP175LJSF

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 1.75A STRAP

TRF250-120T-RC-B-0.5

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 0.12A HOLD

RXEF065-1

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 0.65A HOLD

TR600-160-RA-B0.5-2

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
PTC OVERCURRENT PROTECTOR OFR

AHRF450-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RSET 4.5A AMMO

BK/C515-7-R

Vendor: Cooper Bussmann
Category: Over Current Circuit Protection
FUSE 7.00A 125V T-LAG GLASS C515

RUEF700-1

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 7A HOLD

BK/ABC-V-30-R

Vendor: Cooper Bussmann
Category: Over Current Circuit Protection
FUSE 30A 125V FAST CERM AXIAL

AHRF1300-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RSET 13A HLD AMMO

RHEF450-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 4.5A AMMO

MINISMDM160-2

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH 1.6A HOLD CURRENT SMD

RHEF1000-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 10A HOLD

RGEF400-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 4A HLD AMMO

RGEF600-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 6A HLD AMMO

RGEF900K

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 9A KINK

RGEF1100K

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 11A KINK

RGEF700-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 7A HLD AMMO

RHEF1300-AP

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 13A AMMO

TRF250-120S-B-0.5

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH PTC RESET 0.12A HOLD

LR4-260

Vendor: Raychem/Tyco Electronics
Category: Over Current Circuit Protection
POLYSWITCH 2.6A HOLD LR4 SERIES

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