NTC thermistor solutions Nanjing Shiheng Elec MF72 5D5 for stable resistance and current suppression

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Product Description

Product Overview

The MF72 Series Power Type NTC Thermistors from Nanjing Shiheng Electronics Technology Co., Ltd. are designed to suppress inrush current. This product offers reliable performance with a wide operating temperature range and is manufactured under stringent quality management systems. Key applications include current limiting in power supplies and other electronic circuits where surge protection is critical.

Product Attributes

Brand: Shiheng
Product Name: MF72 Power Type NTC Thermistor
Origin: Nanjing, China
Encapsulation Material: Black Phenolic Resin
Lead Material: Tinned Copper Clad Steel Wire
Certifications: ISO9001:2008, ISO/TS16949:2009, ISO14001:2004, RoHS, Jiangsu Province High-tech Product, TUV

Technical Specifications

Item	Symbol	Test Conditions	Unit	Performance Requirement
1. Electrical Characteristics
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	2500 10%
Max steady-state current	I max		A	0.95
Max allowable capacitance	CT	240Vac	F	100
Dissipation factor			mW/	6
Thermal time constant			sec	20
Withstand voltage		500V/AC, 1min		No breakdown or flashover
Insulation resistance		500V/DC, 1min	M	500
Operating temperature range				-40 ~ 130
Max rated power	Pmax		W	0.5
Resistance-temperature curve				See Figure 1
Volt-ampere curve				See Figure 2
2. Reliability
Lead strength		Tension: (Wire diameter) Tension (N), Time: 101 sec		No visible damage, R/R25%
Solderability		Temperature 2455, Time 2-3 sec		Soldered area 95%
Resistance to soldering heat		Solder pot temperature: 2605, Immersion depth 6mm from resistor body, Time 101 sec		R/R25%
Steady-state damp heat		Temperature: 402, Humidity: 932%, Time: 500 hours		R/R25%
Temperature rapid change		-40 30min25 5min130 30min25 5min, Repeated 5 times		R/R25%
High temperature storage		Temperature: 1305, Time: 1000 hours		R/R25%
Max steady-state current endurance		Continuously apply max steady-state current at room temperature for 50024h		R/R25%
Max capacitance endurance		Apply max allowable capacitance, intermittently close 50ms, open 5 times thermal time constant is one cycle, apply 1000 cycles to the thermistor.		R/R25%
3. Usage Precautions
Purpose: Inrush current suppression. Soldering: Distance from coating at welding point 2mm, welding temperature
4. Derating Curve
(Refer to attached figures for detailed curves)
5. Outline Dimensions (Unit: mm)
D	L	F	T	d
Max 7.0	Min 25	2.51	Max 5.0	0.450.05
6. Product Model Description
NTC 5D-5 NTC: Power Type NTC Thermistor 5: Zero-power resistance at 25 is 5 5: Body diameter D is 5
Model: MF72-5D5 (NTC 5D-5)