Fast Trip 2018 Surface Mounted PTC Resettable Fuse
Low Resistance Fast Trip 2018 Surface Mounted PTC Resettable Fuse 5050 Metric 1.5A 15V
The SMD 2018 series provides surface mount resettable overcurrent protection with holding current from 0.3A to 2.0A. This series is suitable for applications with higher holding currant and higher working voltage up to 60V
Features Of Fast Trip 2018 Surface Mounted PTC Resettable Fuse
Very low profile
Very fast tripping time
High voltage
RoHS compliantand halogen free
2018 footprint
Performance Specification Of Fast Trip 2018 Surface Mounted PTC Resettable Fuse
Model |
|
|
|
|
| Maximum | Resistance |
Vmax | Imax | Ihold | Itrip | Pd | Time To Trip |
|
| @25°C | @25°C | Typ. | Current | Time | R imin | R1max |
(V dc) | (A) | (A) | (A) | (W) | (A) | (Sec) | () | () |
SMD2018R030SF | 60 | 10 | 0.30 | 0.60 | 0.9 | 1.5 | 3.00 | 0.500 | 2.300 |
SMD2018R050SF | 60 | 10 | 0.55 | 1.20 | 1.0 | 2.5 | 3.00 | 0.200 | 1.000 |
SMD2018R075SF | 60 | 10 | 0.75 | 1.50 | 1.1 | 8.0 | 0.30 | 0.110 | 0.630 |
SMD2018R100SF | 15 | 35 | 1.10 | 2.20 | 1.1 | 8.0 | 0.40 | 0.060 | 0.360 |
SMD2018R100SF33V | 33 | 35 | 1.10 | 2.20 | 1.1 | 8.0 | 0.40 | 0.060 | 0.360 |
SMD2018R150SF | 15 | 35 | 1.50 | 3.00 | 1.1 | 8.0 | 0.80 | 0.050 | 0.170 |
SMD2018R200SF | 10 | 35 | 2.00 | 4.00 | 1.1 | 8.0 | 2.40 | 0.030 | 0.100 |
Applications Of Fast Trip 2018 Surface Mounted PTC Resettable Fuse
Power Over Ethernet (IEEE 802.3 af) portprotection
Automotive electronic control moduleprotection
Telecom equipment low voltageprotection
Physical Dimensions Of Fast Trip 2018 Surface Mounted PTC Resettable Fuse(mm.)
Model | A | B | C | D | E |
Min. | Max. | Min. | Max. | Min. | Max. | Min. | Min. |
SMD2018R030SF | 4.72 | 5.44 | 4.22 | 4.93 | 0.50 | 1.20 | 0.30 | 0.25 |
SMD2018R050SF | 4.72 | 5.44 | 4.22 | 4.93 | 0.50 | 1.20 | 0.30 | 0.25 |
SMD2018R075SF | 4.72 | 5.44 | 4.22 | 4.93 | 0.50 | 1.20 | 0.30 | 0.25 |
SMD2018R100SF | 4.72 | 5.44 | 4.22 | 4.93 | 0.50 | 1.20 | 0.30 | 0.25 |
SMD2018R100SF33V | 4.72 | 5.44 | 4.22 | 4.93 | 0.50 | 1.20 | 0.30 | 0.25 |
SMD2018R150SF | 4.72 | 5.44 | 4.22 | 4.93 | 0.50 | 1.20 | 0.30 | 0.25 |
SMD2018R200SF | 4.72 | 5.44 | 4.22 | 4.93 | 0.50 | 1.20 | 0.30 | 0.25 |
Termination Pad Characteristics
Terminal pad materials：Tin-plated Nickel-Copper
Terminal pad solder ability：Meets EIA specification RS186-9E and ANSI/J-STD-002 Category 3.
Recommended Pad Layout Of The 2018 Surface Mount PTC Resettable Fuse(mm.)
Packaging Quantity Of Fast Trip 2018 Surface Mounted PTC Resettable Fuse Part Number | Quantity |
SMD2018R030.050SF | 1500 pcs/reel |
The others | 2500 pcs/reel |
Tape & reel packaging per EIA481-1
Tape And Reel Specifications Of Fast Trip 2018 Surface Mounted PTC Resettable Fuse(mm)
Governing Specifications | EIA 481-1 |
W |
| 12.0±0.2 |
P0 |
| 4.0±0.10 |
P1 |
| 8.0±0.10 |
P2 |
| 2.0±0.05 |
A0 |
| 4.40±0.10 |
B0 |
| 5.50±0.10 |
B1max. |
| 8.20 |
D0 |
| 1.50+ 0.1, -0 |
F |
| 5.5±0.05 |
E1 |
| 1.75±0.10 |
E2min. |
| 10.25 |
T |
| 0.6 |
T1max. |
| 0.1 |
K0 |
| 1.36±0.1 |
Leader min. |
| 390 |
Trailer min. |
| 160 |
Reel Dimensions |
|
A max. |
| 178 |
N min. |
| 50 |
W1 |
| 12.4±0.5 |
W2 |
| 18.4±0.5 |
|
|
|
Storage And Handling |
‧Storage conditions：0℃~30℃,30%~60% R.H. |
‧Devices may not meet specified performance |
if storage conditions are exceeded. |
Test Procedures And Requirements For Fast Trip 2018 Surface Mounted PTC Resettable Fuse
Test | Test Conditions | Accept/Reject Criteria |
Visual/Mech | Verify dimensions and materials | PerAolittelphysical description |
Resistance | In still air @ 23°C | Rmin≤R≤R1max |
Time to Trip | At specified current, Vmax, 23°C | T≤max. time to trip (seconds) |
Hold Current | 30 min. at Ihold | No trip |
Trip Cycle Life | Vmax, Imax,100 cycles | No arcing or burning |
Trip Endurance | Vmax, 48 hours | No arcing or burning |
Solderability | ANSI/J-STD-002 | 95 % min. coverage |
Using a PTC as a Fuse for Circuit Protection
Fusesare commonly used for circuit protectionbecausethey’re cheap, readily available and easy to install - but once they blow they’re done. Why replace blown fuses when you can use a PTC, instead?
‘PTC’is short for Positive Temperature Coefficient Thermistor, a device whose resistance to electrical current increases as it heats up, such as when it’s subjected to harmful surge currents in your circuit. This increase in resistance is very high, effectively blocking excessive current through the circuit until it cools back down and its resistance decreases again. This ability to‘reset’allows a PTC thermistor to protect your circuit multiple times, unlike a one-and-done fuse. In devices like laptops, portable devices, and PC peripherals, PTCs are a great way to offer repeatable protection from unusual surge currents. If you’re more concerned with ensuring that whatever has caused your fault condition is completely stopped however, such as with expensive industrial equipment or delicate calibration gear that cannot tolerate repeated shocks, then you should generally stick with fuses.
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Performance Specification Of Fast Trip 2018 Surface Mounted PTC Resettable Fuse
Packaging Quantity Of Fast Trip 2018 Surface Mounted PTC Resettable Fuse
