Radial Leaded PTC
• The 30R Series Resettable devices utilize a unique polymer-based,
Positive Temperature Coefficient (PTC) material to protect electrical
circuits against overcurrent conditions.
• In normal operation, the 30R Series PTC has many conductive paths
and a very low resistance. In an overcurrent condition, the temperature
of the polymer material rises. This dramatically reduces the conductive
paths resulting in an immediate rise in resistance. In this condition, the
device provides circuit protection by significantly limiting the flow of
current. However, once the cause of the initial overcurrent condition
is eliminated, the 30R Series PTC cools down and resets to a low
resistance value permitting the normal current flow to resume.
• The 30R Series is a 30V Radial Leaded Device with a 40A Short
AGENCY APPROVALS: Recognized under the Components Program
of Underwriters Laboratory and the Component Acceptance Program of
CSA. TUV approved.
AGENCY FILE NUMBERS: UL E183209, CSA LR 108832
30R090-250: Tin plated copper-clad steel, 24 AWG
30R300-900: Tin plated copper, 20 AWG (0.032" Dia.)
Lead Solderability: MIL-STD-202, Method 208E
Coating: Thermoset Coating
Device Labeling: Device is marked with the letter ‘L’, amperage rating,
voltage rating & date code.
Packaging: Standard bulk packaging is 500 pieces per container.
Optional tape and reel packaging per EIA 486-B is also available.
Standard reel quantities:
Passive Aging: 85°C, 1000 Hours. ±5% typical resistance change.
Humidity Aging: 85°C, 85% R.H., 1000 hours. ±5% typical
Thermal Shock: 85°C / –40°C, 20 times. ±10% typical
Vibration: MIL-STD 202, Method 201. No resistance change.
Mechanical Shock: MIL-STD-202, Method 213 test condition I
(100 g’s, 6 sec.). No resistance change.
Max. Surface Temperature: 125°C
Operating/Storage Temperature: –40°C to 85°C
Rerating Curve for 30R Series
-40 -30 -20 -10
0 10 20 30 40 50 60 70 80 90
252 w w w . l i t t e l f u s e . c o m