Sign In | Join Free | My frbiz.com
frbiz.com
Products
Search by Category
Home > Other Electrical Equipment >

NTC Thermistor Resistors 33D-5 0.5A 33 Ohm Inrush Current Limiter Temperature Sensors 50D-5

Categories Power NTC Thermistor
Brand Name: AMPFORT
Model Number: 33D-5
Certification: CQC,UL,TUV
Place of Origin: Dongguan,Guangdong,China
MOQ: 10000PCS
Price: 0.03USD/PC
Payment Terms: T/T, Western Union
Supply Ability: 10KKPCS Per month
Delivery Time: 10 workdays
Packaging Details: Bulk
Name: NTC Thermistor Resistors
Material: Ceramic, Metal
P/N: 33D-5
Zero Power Resistance @25C: 33 Ohm
B Value: 2800
Thermal Recovery Time Coefficient: 18s
Thermal Dissipation Constant: 6mW/C
Max Steady State Current: 0.5A
Lead Type: Radial Direction
Pin Pitch: 5mm
  • Haven't found right suppliers
  • Our buyer assistants can help you find the most suitable, 100% reliable suppliers from China.
  • And this service is free of charge.
  • we have buyer assistants who speak English, French, Spanish......and we are ready to help you anytime!
Submit Buying Request
  • Product Details
  • Company Profile

NTC Thermistor Resistors 33D-5 0.5A 33 Ohm Inrush Current Limiter Temperature Sensors 50D-5


NTC Thermistor Resistors 33D-5 0.5A 33 Ohm Inrush Current Limiter Temperature Sensors 50D-5


Applications Of The NTC Thermistor Resistors 33D-5


Inrush current limiting, e.g. in switch-mode power supplies, soft-start motors


Features Of The NTC Thermistor Resistors 33D-5


* Leaded and coated NTC thermistors

* Tinned copper wire, kinked

* Coating material flame retardant to UL 94 V-0

* Highly stable electrical characteristics


Approvals Of The NTC Thermistor Resistors 33D-5


* UL 1434

* TUV

* CQC


Specification Of The NTC Thermistor Resistors 33D-5


P/NRated zero power resistance
@25C(Ohm)
Max stable current
@25C(A)
Residual resistance
at max current
@25C(A)
B25/85(K)Thermal time constant(s)Dissipation factor(mw/C)CertificationOperating temperature
5D-5510.5842700≤18≥6-40~150CQC UL CUL TUV
6D-560.70.6752700≥6-40~150TUV
7D-570.70.7662700≥6-40~150TUV
8D-550.70.8572700≥6-40~150TUV
10D-5100.71.0392700≥6-40~150CQC UL CUL TUV
12D-5120.61.2352800≥6-40~150TUV
15D-5150.61.5302800≥6-40~150CQC UL CUL TUV
16D-5160.61.6282800≥6-40~150TUV
18D-5180.61.8242800≥6-40~150TUV
20D-5200.62.0202800≥6-40~150CQC UL CUL TUV
22D-5220.62.0602800≥6-40~150CQC UL CUL TUV
25D-5250.52.1232800≥6-40~150TUV
30D-5300.52.2272800≥6-40~150CQC UL CUL TUV
33D-5330.52.4362800≥6-40~150CQC UL CUL TUV
50D-5500.42.6533000≥6-40~150CQC UL CUL TUV
60D-5600.32.7533000≥6-40~150CQC UL CUL TUV
200D-52000.118.73000≥6-40~150UL

Why should use power NTC thermistors


In order to prevent the surge current that occurs at the moment of power-on in the electronic circuit, a power NTC thermistor is connected in series in the power supply circuit, which can effectively suppress the surge current during power-on, and after the surge current suppression effect is completed, due to the Through the continuous effect of its current, the resistance value of the power type thermistor will drop to a very small degree, and the power it consumes can be ignored, and it will not affect the normal operating current, so the power type thermistor is used in the power circuit. NTC thermistor is the most concise and effective way to suppress the power-on surge current to protect electronic equipment from damage.


Selection criteria for power NTC thermistors


1. The maximum operating current of the resistor> the operating current of the actual power circuit
2. Nominal resistance value of power resistors
R≥1.414*E/Im
where E is the line voltage Im is the surge current
About conversion power supply, inverter power supply, switching power supply, UPS power supply, Im=100 times the operating current
About the filament, heater and other circuits Im=30 times the operating current
3. The larger the B value, the smaller the remaining resistance and the smaller the temperature rise during operation.
4. Generally speaking, the greater the product of the time constant and the dissipation factor, the greater the thermal capacity of the resistor and the stronger the resistor's ability to suppress inrush current.


NTC Negative Temperature Coefficient Thermistor Terminology


Zero power resistance value RT (Ω)


RT refers to the resistance value measured by the measurement power that causes the change in resistance value to be negligible relative to the total measurement error at the specified temperature T.


The relationship between resistance value and temperature change is:


RT = RN expB(1/T – 1/TN)


RT : NTC thermistor resistance value at temperature T (K).
RN: NTC thermistor resistance value at extra temperature TN (K).
T: Regular temperature (K).
B: The data constant of the NTC thermistor, also known as the thermal index.
exp : The exponent to the base e of the natural number ( e = 2.71828 … ).


This relationship is an empirical formula and only has a certain accuracy within a limited range of the additional temperature TN or the additional resistance value RN, since the material constant B itself is also a function of the temperature T.


Additional zero power resistor value R25 (Ω)


According to the national standard rules, the additional zero-power resistance value is the resistance value R25 of the NTC thermistor measured at the reference temperature of 25 ℃, and this resistance value is the nominal resistance value of the NTC thermistor. Generally speaking, the resistance value of the NTC thermistor also refers to this value.


Maximum steady state current


The maximum continuous current allowed to be applied to the thermistor at an ambient temperature of 25°C.


Approximate resistance value (Ω) at maximum current at 25°C


The approximate resistance value at the maximum current at 25°C is the remaining resistance value of the thermistor when the allowed maximum continuous current is applied to the thermistor at an ambient temperature of 25°C, also known as the maximum remaining resistance value.

Quality NTC Thermistor Resistors 33D-5 0.5A 33 Ohm Inrush Current Limiter Temperature Sensors 50D-5 for sale
Send your message to this supplier
 
*From:
*To: Dongguan Ampfort Electronics Co., Ltd.
*Subject:
*Message:
Characters Remaining: (0/3000)
 
Inquiry Cart 0