current surge protection using Nanjing Shiheng Elec MF73T-1 5/12 high power ntc thermistor component

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Product Description

Product Overview

The MF73T-1 is a high-power NTC thermistor manufactured by Nanjing Shiheng Electronics Technology Co., Ltd. Designed to suppress inrush current, this thermistor offers reliable performance across a wide operating temperature range. It is suitable for applications requiring protection against current surges.

Product Attributes

Brand: Shiheng ()
Product Type: High-power NTC Thermistor
Model Series: MF73T-1
Encapsulation Material: Black Silicone Resin
Lead Material: Tinned Copper Wire
Certifications: ISO9001:2008, ISO/TS16949:2009, ISO14001:2004, RoHS, CQC Safety Certification, Jiangsu Province High-tech Product Certification, TUV Certification
Origin: Nanjing, China

Technical Specifications

Item	Symbol	Test Conditions	Unit	Performance Requirement
Zero-power resistance at 25	R25	Ta=250.5, Test Power 0.1mW, Tested in Air		5 20%
B Value	B25/50	B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb)	K	3000 10%
Maximum Steady Current	I max		A	12
Maximum Allowable Capacitance	CT	240Vac	F	1200
Dissipation Factor			mW/	Approx. 28
Thermal Time Constant			sec	Approx. 110
Withstand Voltage		500V/AC, 1min		No breakdown or arcing
Insulation Resistance		500V/DC, 1min	M	500
Operating Temperature Range				-40 ~ 200
Maximum Rated Power	Pmax		W	5
Lead Strength (Tensile)		101 sec	N	0.5
Solderability		Temperature 2455, Time 2-3 sec		95% tinning area
Resistance to Soldering Heat		Solder pot temperature: 2605, Immersion depth 6mm from body, Time 101 sec		R/R 25%
Steady Humidity Heat		Temperature: 402, Humidity: 932%, Time: 1000 hours		R/R 25%
Rapid Temperature Change		-40 30min25 5min200 30min 25 5min, 5 cycles		R/R 25%
High Temperature Storage		Temperature: 2005, Time: 1000 hours		R/R 25%
Max Steady Current Endurance		Continuous application of max steady current at room temperature, 100024h		R/R 25%
Max Capacitance Endurance		Apply max allowable capacitance, intermittently close 50ms, open for 5 times thermal time constant per cycle, 1000 cycles		R/R 25%
Model: MF73T-1-5/12
Model Breakdown		Shiheng Brand, MF73T-1: High-power NTC Thermistor, 5: Zero-power resistance at 25 is 5, 12: Maximum steady current is 12A
External Dimensions (Unit: mm)	D	Max 22.5	mm
	L	Min 25	mm
	F	10.0 1	mm
	T	Max 7.0	mm
	d	1.0 0.05	mm

Usage Precautions

Product Use: Inrush current suppression.
Soldering: When using a soldering iron, keep the soldering point at least 2mm away from the coating layer. Soldering temperature should be below 360, and soldering time less than 3 seconds.
Storage Temperature: -10 ~ 40.
Storage Humidity: 75% RH.
Storage Environment: Avoid storage in environments with corrosive gases and direct sunlight.
Packaging: After opening the package, reseal for storage.
Shelf Life: 1 year.