Resettable Fuse Manufacturing
Resettable fuse is my company's own development of over-current protection components, my company am using the high molecular organic polymer at a high pressure, high temperature, vulcanization reaction conditions, adding conductive particles doped material, Manufactured through a special process. The basic steps include: weighing, mixing, dehydration drying, (dry press made into a round, rectangular, round, honeycomb blank) aging, testing and testing process. encapsulated with flame retardant epoxy or polyester film conforming to UL94V-0 or IEC95-2-2. you can customize your desired product parameters. by reading our different product manufacturing services, learn how we can ensure product quality standards, please contact us for quotation or free samples.
What Is Resettable Fuse?
The resettable fuse is an overcurrent protection element that replaces the normal current fuse and can be automatically reset after disconnection. Resettable fuse is made of a polymeric material filled with carbon black particles, this material has a certain conductivity, thus being able to pass the rated current. if the current through the resettable fuse is too high, its heating power is greater than the cooling power, at this point the temperature from the recovery fuse will begin to rise, while the polymer matrix in the resettable fuse begins to expand, this will separate the carbon black particles, and lead to resistance rise, thus very effectively reducing the current in the circuit.
Resettable Fuse Characteristics
1, Because the polymer PTC resistance is recoverable, and thus can be repeated multiple use
2, Polymer PTC thermistor can be used for computers and their external equipment, mobile phones, battery packs, telematics and network equipment, transformers, industrial control equipment, automotive and other electronic products, there are over-current or over-temperature protection.
3, Polymer PTC thermistor and ceramic PTC thermistor is the difference between the initial resistance, action time and size difference. polymer PTC thermistor size is smaller, lower resistance, while faster response.
4, Storage time is long.
5, PTC thermistor can be used in parallel, advantage is to reduce the resistance and increase the holding current.
Resettable Fuses Of Different Sizes Sealed
According to the material can be classified, polymer PPTC and ceramic PTCR two over-current protection components, polymer PPTC according to the package can be divided into:Lead plug-in, and SMD patch.
Lead plug-in PTC resettable fuse are classified according to voltage: 600V, 250V, 130V, 120V, 72V, 60V, 30V, 24V, 16V, 6V
SMD polymer PTC self-healing fuse package size: 0603, 0805, 1206, 1812, 2920,
Shenzhen Wondhope Electric Co., Ltd Is A Hi-tech Enterprise For Manufacturing The Pptc ( Polymer Positive Temperature Coefficient ).
As A Professional Manufacturer, Wondhope Is Able To Develop And Produce With Advanced Manufacturing And Testing Equipments. The Whptc Resettable Fuses Are Widely Used In The Communications, Automotive Electronics, Mini-motors Loudspeaker, Electronic Instrumentation, And A Wide Wariety Of Other Electronic Equipment. The Corporation Have Been Awarded The Certificate Of The Iso9001:2000(quality Management System Standards).
The Packing Is Diffrent According To The Product Series.
Rating current and voltage 5-15a 250v
Tolerant voltage: above 1500
Rated functioning temp. Tf deg c:70-360;over 100 varieties
Certification: pse ccc iso9001
Having applied for the national patent( above 240deg celsius)
Small resistance, low central temperature
Tolerance:-2 +2
Qty capacity:more than 1 million pcs per month
Packing:polythene bags;cartons
Product advantages
The technological performance of products is high and the products have wide temperature specifications, especially the high temperature ones that could satisfy the requirements of the special consumers. The exported products implement the international authentication standard of japan pse and the products for domestic sale implement authentication standard of china ccc. The quality control of company are all inspected strictly from the purchasing products to all of the production procedure and the finished products leaving the plant.
Japan powerful company pursues the best service for the consumers. Whatever quantity customers order every time, all product logos are printed the one-shot batch number. If necessary, mark "**special provision" for your company.
Packing: polythene bags
Cartons
Carton: 12.5 cm*12.5 cm*7.5 cm
Weight: 0.63 kg
Qty:500 pcs.
Ptc thermistors are used to monitor temperature in machines and installations. The design ensures short response times and easy installation.
The product sells point
Ptc thermistors acc. To din 44081(triple sensors acc. To din 44082) are used to protect electrical machines against thermal overload. Thermistors have an even steeper r/t characteristic as that defined in the din standard. The temperature range is from 60 to 180. Ptc thermistors beads with different rated response temperatures can be connected in series. This permits an optimal and economic thermal protection of machines and windings with different limit tempratures.
Key specifications/special features
Single triple
Max.Operating voltage 30 30 v
Rated response temperature tk60-18 c
Tolerance of tk ía5 ía5 k
Resproducibility of tk ía0.5 ía0.5 k
Resistance r25 ín100 ín300 ª+
Resistance at a temperature of tk-5k ín550 ín1650 ª+
Resistance at a temperature of tk +5k í²1330 í²3990 ª+
Resistance at a temperature of tk +15k í²4 í²12 kª+
Thermal response time td ín5 ín5 s
Insulation test voltage v ac2.5 ac2.5 kv
Max.Operating temprature 200 200 c
Max.Storage temperature 160 160 c
Min.Srorage temperature -25 -25 c
Weight 2 3.5 g
Catalog symbols:
EV20-(amp) 20 mm diameter
EV25-(amp) 25 mm diameter
EV30-(amp) 30 mm diameter
Description:
Eatons Bussmann® series Electric Vehicle (EV)
fuses for the protection of high power battery
charging and management systems up to 500 Vdc
in ratings from 50 to 400 amps.
Specifications:
Ratings
Volts - 500 Vdc
Amps 50-400 A
Interrupting rating
Max DC 20 kA
Min DC 200%
Agency information
Designed to:
JASO D622
ISO 8820-8
Manufactured under a TS16949 quality system
for compliance with automotive requirements
RoHS compliant
REACH declaration available upon request
Packaging
20 mm fuses: 250 fuses per box
25 mm fuses: 100 fuses per box
30 mm fuses: 100 fuses per box
Features:
Higher voltage rating provides overall system efficiency using smaller, more economical
conductors while meeting the needs of higher voltage battery packs.
Higher interrupting rating protects high capacity battery packs needed for vehicle acceleration and range requirements.
Up to ten times faster opening under high fault current conditions helps assure reliable
protection of circuits and components.
Requires up to 48% less space than conventional high speed fuses to help reduce
space and weight.
Data logging system marks each fuse with a serial number and date code for traceability of Critical to Quality characteristics.
To help project the life of the fuse in your application, unique driving profiles and
conditions can be simulated to verify proper fuse size and performance under a wide range of driving behaviors.
Operation as low as 200% overload provides back up protection to the battery management system.
Can be applied in parallel to realize greater ampacity within sizing guidelines.
CH modular, IP20 finger-safe DIN-Rail holders for Class CC, midget and PV fuses
Bussmann series CH DIN-Rail fuse holders are for UL Class CC and
midget fuses, and IEC 10x38mm fuses. They are available with and
without indication in 1-, 2- and 3-pole IP20 finger-safe versions. A variety of accessories extends their application flexibility and they may be ganged together to meet specific application requirements.
Ratings
Volts
600 V (or less) UL
690 V (or less) IEC
1000 Vdc (or less) photovoltaic (PV)
Amps
30 A UL
32 A IEC
SCCR
33 kA photovoltaic
200 kA RMS Sym. (CHCC, CHM*)
* CHM SCCR is fuse interrupting rating dependent.
Agency information
CHCC, CHM; UL Listed Guide IZLT, Recognized Guide IZLT2, File
E14853
CHPV, UL Listed to 4248-19, Guide IZMR, File E348242
CSA File 47235, CHPV and CHM - Class 6225-30, CHCC - Class
6225-01
IEC 60269-2 (CHM, CHPV)
CCC
RoHS compliant
CE
Storage and operating temperature
-4°F (-20°C) to +194°F (90°C) indicating
-4°F (-20°C) to +248°F (120°C) non-indicating
Features
High SCCR rated, UL Listed Class CC holder with optional open
fuse indication for 600 V and 48 Vdc (see catalog number table for
details)
Enhanced safety with IP20 finger-safe construction
UL Recognized midget and IEC 10x38mm holders with factory
assembled neutral pole option
Agency ratings up to 1000 Vdc for use with PV fuses.
Available remote PLC fuse indication module
Wiring flexibility with terminals rated for use with 75°C or 90°C
solid, stranded and fine stranded wire, and fork terminals and
comb busbars. (Use any higher temperature insulations at the
90°C ampacity with appropriate derating.)
Complete range of UL Listed and high SCCR rated one- and
threephase finger-safe comb busbars and power feed lugs
Optional hex head terminal screw makes it easier to achieve
necessary torque values
CH modular, IP20 finger-safe DIN-Rail holders for
Class CC, midget and PV fuses
Bussmann series CH DIN-Rail fuse holders are for UL Class CC and
midget fuses, and IEC 10x38mm fuses. They are available with and without indication in 1-, 2- and 3-pole IP20 finger-safe versions. A variety of accessories extends their application flexibility and they may be ganged
together to meet specific application requirements.
Ratings
Volts
600 V (or less) UL
690 V (or less) IEC
1000 Vdc (or less) photovoltaic (PV)
Amps
30 A UL
32 A IEC
SCCR
33 kA photovoltaic
200 kA RMS Sym. (CHCC, CHM*)
* CHM SCCR is fuse interrupting rating dependent.
Agency information
CHCC, CHM; UL Listed Guide IZLT, Recognized Guide IZLT2, File
E14853
CHPV, UL Listed to 4248-19, Guide IZMR, File E348242
CSA File 47235, CHPV and CHM - Class 6225-30, CHCC - Class
6225-01
IEC 60269-2 (CHM, CHPV)
CCC
RoHS compliant
CE
Wire range
75°C and 90°C Cu
18-4 AWG (0.8-21.1mm2)
Solid, stranded and fine stranded*
* See data sheet 10430 for application details.
Terminals
Single or dual conductors
Comb busbar
Terminal screws
Standard phil-slot
Optional hex head (order by adding -H suffix to the catalog
number, e.g., CHM1DU-H)
Torque
30 lb-in (3.4 Nâ?¢m) maximum
Flammability
UL 94V0, self-extinguishing
Storage and operating temperature
-4°F (-20°C) to +194°F (90°C) indicating
-4°F (-20°C) to +248°F (120°C) non-indicating
Features
High SCCR rated, UL Listed Class CC holder with optional open
fuse indication for 600 V and 48 Vdc (see catalog number table for
details)
Enhanced safety with IP20 finger-safe construction
UL Recognized midget and IEC 10x38mm holders with factory
assembled neutral pole option
Agency ratings up to 1000 Vdc for use with PV fuses.
Available remote PLC fuse indication module
Wiring flexibility with terminals rated for use with 75°C or 90°C
solid, stranded and fine stranded wire, and fork terminals and
comb busbars. (Use any higher temperature insulations at the
90°C ampacity with appropriate derating.)
Complete range of UL Listed and high SCCR rated one- and threephase finger-safe comb busbars and power feed lugs
Optional hex head terminal screw makes it easier to achieve
necessary torque values
FNQ-R Class CC Limitronâ?¢ time-delay,
rejection-type fuse
Time-delay, branch circuit, rejection-type fuse. For superior electrical
protection, Eaton recommends upgrading FNQ-R fuse applications
to Bussmann series Low-Peak LP-CC fuses, see page 1-5. For
dimensions.
Ratings
Volts
600 Vac (or less)
300 Vdc (15-20 A)
32 Vdc (self certified)
Amps 1/4-30 A
IR
200 kA RMS Sym.
20 kA DC (15 and 20 A only)
Agency information
UL Listed, Std 248-4, Class CC, Guide JDDZ, File E4273,
CSA Certified, Class 1422-01, File 53787, RoHS compliant, CE
Features
Class CC rejection feature, with appropriate fuse block, prevents
inserting lesser-rated supplementary fuses
Time-delay compatible with inrush characteristic of small control
transformers
Current limitation at Class CC levels provides maximum
component short-circuit current rating protection
200 kA interrupting rating provides high ratings for control circuit
locations
Typical applications
Line protection, small control transformers
Industrial controls and panels
Isolated, in-line fuse holders
KTK fast-acting 13/32" x 1-1/2"supplemental fuse
Fast-acting supplemental fuse.
Black color code (600 Vac max).
For superior protection, Eaton
recommends upgrading to
Bussmann series Low-Peak Class
CC fuses.
Agency information
â?¢ UL Listed, Std. 248-14, Guide JDYX, File E19180, CSA Certified,
C22.2 No. 248.14, Class 1422-01, File 53787, HRC-MISC, RoHS
compliant, CE
Features
â?¢ Black color code for 600 Vac rating
â?¢ Fast-acting for resistive loads
â?¢ Melamine tube construction with nickel-plated bronze endcaps
Typical applications
â?¢ Control circuits
â?¢ Lighting circuit protection
â?¢ Meter circuits
PTC thermistors current protector, also called PTC thermistor resettable fuses, protect load against over-current, overload, short circuit. No need for replacement, resume protective function after a short cooling-down time.
Ceramic PTC (positive temperature coefficient) thermistors are used instead of conventional fuses to protect load, such as motors, transformers, or electronic circuit, against overcurrent for circuit protection. PTC thermistor protector not only respond to inadmissibly high currents but also if a preset temperature limit is exceeded. PTC thermistor over-current protector limits the power dissipation of the whole circuit by increasing their resistance and thus reducing the current to a harmless residual value. In contrast to conventional fuses, PTC thermistor resettable fuses do not have to be replaced after elimination of the fault but resume their protective function immediately after a short cooling-down time.
PTC Thermistor Over-current Protector Application
It applies in the over-current overload and short circuit protection of transformers, battery charger, switches, switch power supply, adaptor, meter, instrumentation, apparatus, electronic coils, control panels, air conditioner, automotive electron, etc.
Operating Principle of PTC Thermistor for Overload Over-current Protection
The operating principle is as indicated in the following. When a circuit is in the normal status, the current through PTC is lower than the rated current and PTC thermistor protector is in the normal state with small resistance value, which will not affect the normal operation of the protected circuit. In case of some fault in the circuit and the current is greater than the rated current, the PTC thermistor protector will become hot quickly and present a high resistance state, which sets the circuit relatively "off" to protect the circuit from damage. After the fault is removed, PTC thermistor protector will automatically restore its low resistance state and the circuit will resume normal operation.
Normally, when PTC thermistor is used as an overcurrent protection component, it is preferred to select maximum operating current, maximum operating voltage and proper specifications. Furthermore such factors should be taken into consideration as the dimensions of the components, rated zero-power resistance, operating temperature range, etc.
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