LVR025K TE Connectivity, LVR025K Datasheet - Page 3

• Manufacturer Part Number: LVR025K
• Description: POLYSWITCH, 0.25A
• Manufacturer: TE Connectivity
• Series: LVRr

Specifications of LVR025K

• Tripping Current: 0.56A
• Initial Resistance Max: 2.10ohm
• Operating Voltage: 240V
• Approval Bodies: CSA, TUV
• Approval Category: UL Recognised
• External Depth: 3.8mm
• External Length / Height: 18.8mm
• External: RoHS Compliant
• Ul File Number: E74889
• Csa File Number: 78165C
• Vmax Operating (v): 240
• Vmax Interrupt (v Rms): 265
• Imax Interrupt (a): 3.5
• Ih (room Temperature) (a): 0.25
• It (room Temperature) (a): 0.56
• Rmin (?): 1.30
• Rmax (?): 2.100
• R1 Max [post Trip] (?): 3.80
• Power Dissipation (typical) (w): 1.50
• Construction: Radial
• Lead Type: Kinked
• Family Name: LVR
• 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.: R72041437
• Operating Temperature (max.) (°c): 85
• Application: Radial
• Packaging Method: Bulk

Raychem Circuit Protection
Step 4.
Time-to-trip is the amount of time it takes for a device to switch
to a high-resistance state once a fault current has been applied
across the device. Identifying the PolySwitch device’s time-to-
trip is important in order to provide the desired protection
capabilities. If the device you choose trips too fast, undesired
or nuisance tripping will occur. If the device trips too slowly, the
components being protected may be damaged before the
device switches to a high-resistance state.
Refer to the typical time-to-trip curves for each of the
PolySwitch devices found in Figures R17–R23.
If the time-to-trip of the PolySwitch device is too fast or too slow
for the circuit, go back to Step 2 and choose an alternate
device.
Step 5.
Ensure that your application’s minimum and maximum ambient
temperatures are within the operating temperature of -40°C to
85°C (-40 to 125°C for RHE device series).
Step 6.
Using the dimensions in Table R4, compare the dimensions of
the PolySwitch device you selected with the application’s space
considerations.
Determine time-to-trip.
Verify ambient operating conditions.
Verify the PolySwitch device dimensions.
PolySwitch Radial-leaded Resettable Devices
Radial-leaded
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