SR250 series
Features
Product Details
SR250 Series PTC Thermistor
SR250 series PTC thermistor has the rated working voltage of 250V and rated maintenance current of 0.08A-0.06. As an over-current protector specially designed for switchboard and distributing frame, it is advantaged by small room temperature resistance, high reliability, and convenient installation, the use available in an environment at 60DEG C or above, and automatic restoration and reuse after faults in circuits are eliminated. Proved through random inspection by Test Center for Protective Products of Ministry of Information Technology and Telecommunications (former Ministry of Posts and Telecommunications) and State Bureau of Technical Supervision (CSBTS) many times, its performance completely conforms to standards of the posts and telecommunications industry.
★Electric Performance(20℃):
| Model IH Vmax Imax Vmax.interrupt R min R max (Ampere) (Volt) (Ampere) (Volt) (Ampere) (Ampere) |
| SR250-080/SR250-080U 0.080 60 3 250 14.00 20.00 |
| SR250-100/SR250-100U 0.100 60 3 250 10.00 16.00 |
| SR250-110/SR250-110U 0.110 60 3 250 8.00 16.00 |
| SR250-120/SR250-120U 0.120 60 3 250 6.00 12.00 |
| SR250-130/SR250-130U 0.130 60 3 250 4.00 10.00 |
| SR250-145/SR250-145U 0.145 60 3 250 3.00 8.00 |
| SR250-160/SR250-160U 0.160 60 3 250 2.00 6.00 |
| SR250-180/SR250-180U 0.180 60 10 250 0.80 3.00 |
| SR250-200/SR250-200U 0.200 60 10 250 0.80 3.00 |
| SR250-400/SR250-400U 0.400 60 10 250 0.80 2.50 |
| SR250-600/SR250-600U 0.6 00 60 10 250 0.60 1.70 |
★Element Size
| Model A B C D E F Shape Max. Max. Typical Min. Max. Typical Figure |
| SR250-080 5.0 5.0 2.5 1 |
| SR250-080U 7.0 7.0 5.1 7.6 4.6 3.1 2 |
| SR250-100 5.0 5.0 2.5 1 |
| SR250-100U 7.0 7.0 5.1 7.6 4.6 3.1 2 |
| SR250-120 5.5 5.5 2.5 1 |
| SR250-120U 7.0 7.0 5.1 7.6 4.6 3.1 2 |
| SR250-130 6.0 6.0 2.5 1 |
| SR250-130U 8.0 8.0 5.1 7.6 4.6 3.1 2 |
| SR250-145 6.0 6.0 2.5 1 |
| SR250-145U 8.0 8.0 5.1 7.6 4.6 3.1 2 |
| SR250-160 6.0 6.0 2.5 1 |
| SR250-160U 8.0 8.0 5.1 7.6 4.6 3.1 2 |
| SR250-180 10.0 6.3 2.5 1 |
| SR250-180U 12.0 8.0 5.1 7.6 4.6 3.1 2 |
| SR250-200U 11.0 15.0 5.1 7.6 6.0 3.1 3 |
| SR250-400U 11.0 15.0 5.1 7.6 6.0 3.1 3 |
| SR250-600U 13.0 17.0 5.1 7.6 6.0 3.1 3 |
★ Electrode Lead and Encapsulating Material
|
Shape
|
Lead Material |
Diameter （mm）
|
Encapsulating Material
|
|
SR250－080～SR250－180U
|
Nickel-plated Steel Wire
|
0.60
|
Flame Retarded Epoxy Resin
|
|
SR250－200～SR250－600U
|
Nickel-plated Steel Wire
|
0.80
|
Flame Retarded Epoxy Resin
|
Note: Flame retarded epoxy resin meets the requirements of UL94V-0.