RUEF400-2 TE Connectivity, RUEF400-2 Datasheet - Page 26

• Manufacturer Part Number: RUEF400-2
• Description: FUSE, PTC RESET, 30V, 4A, RADIAL
• Manufacturer: TE Connectivity
• Series: RUEFr

Specifications of RUEF400-2

• Holding Current: 4A
• Tripping Current: 8A
• Initial Resistance Max: 0.03ohm
• Operating Voltage: 30V
• Ptc Fuse Case: Radial Leaded
• Initial Resistance Min: 0.01ohm
• Resistance R1: 0.05ohm
• Rohs Compliant: Yes
• Hold Current: 4A
• Trip Current: 8A
• Initial Resistance (min): 10mOhm
• Initial Resistance (max): 30mOhm
• Voltage Rating Max: 30V
• Trip Time (max): 12.7@20As
• Power Dissipation (typ): 2.5W
• Post Trip Resistance (max): 50mOhm
• Wire Form: Straight
• Agency Approvals: CSA/TUV/UL
• Operating Temperature Min Deg. C: -40C
• Operating Temperature Max Deg. C: 85C
• Ul File Number: E74889
• Csa File Number: A78165
• Vmax (v): 30
• Imax (a): 100
• Ih (room Temperature) (a): 4
• It (room Temperature) (a): 8.00
• Rmin (?): 0.01
• Rmax (?): 0.030
• R1 Max [post Trip] (?): 0.05
• Power Dissipation (typical) (w): 2.50
• Construction: Radial
• Lead Type: Straight
• Family Name: RUEF
• Coating: Coated
• Rohs/elv Compliance: RoHS compliant, ELV compliant
• Lead Free Solder Processes: Wave solder capable to 240°C, Wave solder capable to 260°C, Wave solder capable to 265°C
• Rohs/elv Compliance History: Always was RoHS compliant
• Tuv Certificate No.: Available on request (per IEC 60730-1)
• Operating Temperature (max.) (°c): 85
• Application: Radial
• Packaging Method: Tape & Reel
• Lead Free Status / Rohs Status: Compliant

13
13 5
Figure R25 - EIA Referenced Reel Dimensions for Radial-leaded Devices
Part Numbering System for Radial-leaded Devices
RUEF
1)
2)
3)
4)
5)
6)
7)
8)
9)
10) PTC devices are not recommended to be installed in applications where the device is constrained such that its PTC properties
11) Contamination of the PTC material with certain silicone-based oils or some aggressive solvents can adversely impact the
Users should independently evaluate the suitability of and test each product selected for their own application.
This product should not be used in an application where the maximum interrupt voltage or maximum interrupt current can
be exceeded in a fault condition. Operation beyond the maximum ratings or improper use may result in device damage and
possible electrical arcing and flame.
A PTC device is not a fuse - it is a nonlinear thermistor that limits current. Because under a fault condition all PTC devices
go into a high resistance state but not open circuit, hazardous voltage may be present at PTC locations.
The devices are intended for protection against occasional overcurrent or overtemperature fault conditions and should not
be used when repeated fault conditions or prolonged trip events are anticipated.
In most applications, power must be removed and the fault condition cleared in order to reset a PTC device. However, under
certain unusual conditions, a PTC device may automatically reset. Accordingly, PTC devices should not be used in an
application where an automatic reset could create a safety hazard, such as garbage disposals and blenders.
It is the responsibility of the user to determine the need for back up or fail safe protection to prevent damage that may occur
in the event of abnormal function or failure of the PTC device.
Operation in circuits with a large inductance can generate a circuit voltage (Ldi/dt) above the rated voltage of a PTC device.
Devices are not recommended for reflow soldering.
Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic,
thermal, or mechanical procedures for electronic components.
are inhibited, for example in rigid potting materials or in rigid housings, which lack adequate clearance to accommodate device
expansion.
performance of the devices.
WARNING: Application Limitations for the LVR Product Line
250
w
w
1
2
Optional shape: Circular or polygonal
U
Cross section
c
n
2
a
unreeling
Direction
of
Blank = Packaged in bags
-1 = 25.4mm (1.0 inch) minimum lead length
-2 = Tape and reel
-AP = Ammo pack
-X.X = Special lead cut length (inch)
Modifier
K = Standard kinked lead
B = Special kinked lead
S = Straight lead
U = Uncoated device
Hold current indicator
Product series - An "F" at the end of product series
indicates Pb-free version of product.
Reel
Upper side
Lower side
Tape