Disc PPTC Thermistor Ceramic Dip PTC Resettable Fuse 250V For Telecommunication Overload
简介
Due to increasing demands for electronic components in more and more ambitious applications, the protection of these systems has become very important. Especially in cost intensive applications a reliable over current protection has to be ensured.
A right circuit protection has therefor a direct influence on the correct function of the application and on its long life cycle and quality. Wherever a replacement of the protection components in case of need is not possible, the use of resettable fuses is indispensable.
Features Of The Dip PTC Resettable Fuse 250V
• Wide resistance range in telecom area from 4 Ω to 70 Ω
• Fast protection against power contact faults
• Withstand high overload currents of up to 10 A
• High voltage withstanding capabilities for the larger sized thermistors (up to 600 V)
• Good tracking over a wide temperature range for all matched or binned thermistors (matching at 85 °C ≤ 2 x matching at 25 °C)
• UL1434 approved types available (XGPU2)
• All telecom PTCs are coated with a high temperature silicon lacquer (UL 94 V-0) to protect them from any harsh environments and to improve their lifetime
Application Of The Dip PTC Resettable Fuse 250V
Over-temperature/over-load protection:
• Main distribution frame (MDF)
• Central office switching (C.O.)
• Subscriber terminal equipment (T.E.)
• Set-top box (S.B.)
Description Of The Dip PTC Resettable Fuse 250V
Polymer Positive Temperature Coefficient (PPTC) Resettable Fuses are overcurrent protection devices used in a wide variety of circuit protection applications. Under fault conditions a PTC's resistance will rise exponentially and remain in a tripped state, providing continuous overcurrent protection until the fault is removed. Once the fault is removed, the power cycled through the device will return to its normal low resistance state.
Electrical Characteristics Of The Dip PTC Resettable Fuse 250V
P/N | Hold Current | Trip Current | Max Current | Max Current |
Max Voltage | Max Trip Time | Power consumption | Resistance Range (Ω) |
IH, (A) | IT,(A) | Vmax,(v) | Imax,(A) | Vmax,(v) | (A) | (Sec.) | Pd typ(W) | Rmin | Rmax | R1max |
TRF002 | 0.020 | 0.045 | 60 | 3.0 | 250 | 1.0 | 0.1 | 1.0 | 65 | 145 | 240 |
TRF004 | 0.040 | 0.080 | 60 | 3.0 | 250 | 0.50 | 1.0 | 1.0 | 24.0 | 65.0 | 97.5 |
TRF006 | 0.060 | 0.120 | 60 | 3.0 | 250 | 0.50 | 2.0 | 1.0 | 22.0 | 36.0 | 56.0 |
TRF008 | 0.080 | 0.160 | 60 | 3.0 | 250 | 0.35 | 4.0 | 1.0 | 14.0 | 22.0 | 33.0 |
TRF009 | 0.09 | 0.22 | 60 | 3.0 | 250 | 1.0 | 1.0 | 1.0 | 9.7 | 20.6 | 33.0 |
TRF011 | 0.110 | 0.220 | 60 | 3.0 | 250 | 1.0 | 2.0 | 1.0 | 6.0 | 12.0 | 18.0 |
TRF012 | 0.12 | 0.24 | 60 | 3.0 | 250 | 1.00 | 3.0 | 1.0 | 6.0 | 10.0 | 16.0 |
TRF012U | 0.12 | 0.24 | 60 | 3.0 | 250 | 1.00 | 1.5 | 1.0 | 6.0 | 10.0 | 16.0 |
TRF014 | 0.145 | 0.29 | 60 | 3.0 | 250 | 1.00 | 2.5 | 1.0 | 3.0 | 6.0 | 14.0 |
TRF014U | 0.145 | 0.29 | 60 | 3.0 | 250 | 1.0 | 2.5 | 1.0 | 3.5 | 6.5 | 12.0 |
TRF018 | 0.18 | 0.54 | 60 | 3.0 | 250 | 3.0 | 1.5 | 1.8 | 1.0 | 2.2 | 4.0 |
TRF018U | 0.18 | 0.54 | 60 | 3.0 | 250 | 3.0 | 1.5 | 1.8 | 1.0 | 2.2 | 4.0 |
TRF020 | 0.2 | 0.6 | 60 | 3.0 | 250 | 3.0 | 5.0 | 1.8 | 1.7 | 3.5 | 6.30 |
TRF030 | 0.30 | 0.60 | 60 | 3.0 | 250 | 3.0 | 6.0 | 1.8 | 1.0 | 2.2 | 3.50 |
TRF040 | 0.400 | 0.800 | 60 | 5.5 | 250 | 3.0 | 8 | 1.8 | 0.80 | 1.60 | 3.20 |
TRF050 | 0.50 | 1.00 | 60 | 6.0 | 250 | 3.0 | 10 | 3.0 | 0.56 | 1.40 | 2.52 |
TRF060 | 0.60 | 1.20 | 60 | 7.0 | 250 | 3.0 | 12 | 3.2 | 0.40 | 1.10 | 2.16 |
Trf080 | 0.80 | 1.60 | 60 | 8.0 | 250 | 4.0 | 18 | 3.6 | 0.32 | 0.80 | 1.44 |
TRF100 | 1.00 | 2.00 | 60 | 10.0 | 250 | 5.0 | 21 | 2.9 | 0.22 | 0.50 | 0.90 |
TRF200 | 2.00 | 4.00 | 60 | 10.0 | 250 | 10.0 | 28 | 4.5 | 0.09 | 0.16 | 0.26 |
“U” suffix indicates product without insulation coating.
Product Dimensions & Marking Of The Dip PTC Resettable Fuse 250V (Unit: mm)
P/N | A | B | C | D | E | Physical Characteristics |
Max. | Max. | Typ. | Min. | Max. | Style | Lead Dia. | Material. |
TRF002 | 7.4 | 12.7 | 5.1 | 7.6 | 4.5 | 1 | 0.5 | CP |
TRF004 | 5.8 | 9.9 | 5.1 | 7.6 | 4.5 | 1 | 0.5 | CP |
TRF006 | 5.8 | 9.9 | 5.1 | 7.6 | 4.5 | 1 | 0.6 | Sn/Cu |
TRF008 | 7.4 | 12.7 | 5.1 | 7.6 | 4.5 | 1 | 0.6 | Sn/Cu |
TRF009 | 7.4 | 12.7 | 5.1 | 7.6 | 4.5 | 1 | 0.6 | Sn/Cu |
TRF011 | 6.5 | 11.0 | 5.1 | 5.0 | 4.5 | 2 | 0.6 | Sn/Cu |
TRF012 | 6.8 | 12.0 | 5.1 | 7.6 | 4.5 | 2 | 0.6 | Sn/Cu |
TRF012U | 6.8 | 12.0 | 5.1 | 7.6 | 4.5 | 2 | 0.6 | Sn/Cu |
TRF014 | 6.5 | 11.0 | 5.1 | 5.0 | 4.5 | 2 | 0.6 | Sn/Cu |
TRF014U | 6.0 | 10.0 | 5.1 | 4.7 | 4.5 | 2 | 0.6 | Sn/Cu |
TRF018 | 10.2 | 14.5 | 5.1 | 7.6 | 4.5 | 1 | 0.6 | Sn/Cu |
TRF018U | 10.2 | 14.5 | 5.1 | 7.6 | 4.5 | 1 | 0.6 | Sn/Cu |
TRF020 | 10.5 | 17.0 | 5.1 | 7.6 | 4.5 | 1 | 0.6 | Sn/Cu |
TRF030 | 11.0 | 16.8 | 5.1 | 7.6 | 4.5 | 1 | 0.6 | Sn/Cu |
TRF040 | 11.7 | 17.0 | 5.1 | 7.6 | 3.8 | 1 | 0.6 | Sn/Cu |
TRF050 | 13.0 | 18.0 | 5.1 | 7.6 | 3.8 | 2 | 0.6 | Sn/Cu |
TRF060 | 14.0 | 19.5 | 5.1 | 7.6 | 3.8 | 2 | 0.6 | Sn/Cu |
TRF080 | 16.3 | 21.3 | 5.1 | 7.6 | 3.8 | 3 | 0.8 | Sn/Cu |
TRF100 | 17.8 | 22.9 | 5.1 | 7.6 | 3.8 | 3 | 0.8 | Sn/Cu |
TRF200 | 28.4 | 33.5 | 10.2 | 7.6 | 3.8 | 3 | 0.8 | Sn/Cu |
Packing Info Of The Dip PTC Resettable Fuse 250V
Model Q’ty/bag
TRF002-TRF040 1000 pcs
TRF050-TRF100 500 pcs
TRF200 200 pcs
ØTape and Reel Specifications
Devices taped using EIA468–B/IEC286-2 standards.
PPTC Resettable Fuse Parametric Search Product Selection Guide
a
Hold Current (A)
b
Max. Voltage (V)
c
Mounting Style
d
Size
PTC Applications Of The Dip PTC Resettable Fuse 250V
PTCs are used as circuit protection in applications where sensitive components are at risk of damage from overcurrent conditions. The ability of PTCs to reset themselves after exposure to a fault current makes them ideal for use in circuits that are not easily accessible to a user or technician. Typical applications include port protection on personal computers (USB, Firewire, keyboard/mouse, and serial ports), peripherals (hard drives, video cards, and hubs), cell phone, battery packs, industrial controls, lighting ballast and motor controls.
When to apply a resettable PTC vs. a traditional fuse is always the choice of the There is an important area of applications where the use of resettable fuses (PTCs) has become a requirement.
Much of the design work for personal computers and peripheral devices is strongly infl uenced by the Microsoft and Intel System Design Guide which states that “Using a fuse that must be replaced each time an overcurrent condition occurs is unacceptable.” And the SCSI (Small Computer Systems Interface) Standard for this large market includes a statement that “....a Positive Temperature Coefficient device must be used instead of a fuse, to limit the maximum amount of current sourced”.The application selection guide below should be used as an aid in selecting the proper device for your end application. Please consult the datasheets for detailed technical specifications designer or technician but in some cases, PTC’s offer a convenient form of circuit protection to improve the reliability of an application.
