Next
Previous
Resettable PTCs
Radial Leaded PTC
®
®
30R Series
• The 30R Series Resettable devices utilize a unique polymer-based,
Positive Temperature Coefficient (PTC) material to protect electrical
circuits against overcurrent conditions.
Standard reel quantities:
Part
Reel
Quantity
Part
Number
Reel
Quantity
Number
• 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.
R30R300
R30R400
1500
R30R090
R30R110
R30R135
R30R160
R30R185
R30R250
30R500
30R600
30R700
30R800
30R900
3000
Bulk Only
500 Per
Container
ENVIRONMENTAL SPECIFICATIONS:
• The 30R Series is a 30V Radial Leaded Device with a 40A Short
Circuit Rating.
Passive Aging: 85°C, 1000 Hours. 5% typical resistance change.
Humidity Aging: 85°C, 85% R.H., 1000 hours. 5% typical
AGENCY APPROVALS: Recognized under the Components Program
of Underwriters Laboratory and the Component Acceptance Program of
CSA. TUV approved.
resistance change.
Thermal Shock: 85°C / –40°C, 20 times. 10% typical
resistance change.
AGENCY FILE NUMBERS: UL E183209, CSA LR 108832
PHYSICAL SPECIFICATIONS:
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.
Materials: Leads
30R090-250: Tin plated copper-clad steel, 24 AWG
(0.020" Dia.)
Max. Surface Temperature: 125°C
30R300-900: Tin plated copper, 20 AWG (0.032" Dia.)
Operating/Storage Temperature: –40°C to 85°C
Lead Solderability: MIL-STD-202, Method 208E
Coating: Thermoset Coating
Rerating Curve for 30R Series
200
Device Labeling: Device is marked with the letter ‘L’, amperage rating,
voltage rating & date code.
150
100
50
Packaging: Standard bulk packaging is 500 pieces per container.
Optional tape and reel packaging per EIA 486-B is also available.
0
-40 -30 -20 -10
0
10
20
30
40
50
60
70
80
90
Temperature (°C)
252
www. littelfuse. com