Chip NTC thermistor Nanjing Shiheng Elec CMFA 103F3950 designed for operation in wide temperature ranges

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Product Description

Product Overview

The CMFA series chip NTC thermistors from Nanjing Shiheng Electronic Technology Co., Ltd. are designed for accurate temperature sensing applications. These components offer reliable performance with various resistance values and B constants, making them suitable for a wide range of industrial and electronic equipment. They are characterized by their small form factor, precise electrical characteristics, and robust construction, ensuring stable operation across a broad temperature range.

Product Attributes

Brand: Shiheng ()
Origin: Nanjing, China
Product Type: Chip NTC Thermistor

Technical Specifications

Part Number	Type	External Dimensions (LW)	Nominal Zero-Power Resistance (25)	Tolerance of Resistance	B Constant (25/50) (K)	B Constant (25/85) (K)	Permissible Operating Current (25) (mA)	Dissipation Factor (mW/)	Thermal Time Constant (s)	Rated Power (25) (mW)	Operating Ambient Temperature ()
CMFA 103F3950	CMF (Chip NTC Thermistor)	A(0603): 1.60.8 mm	10k (103)	5% (J)	3950	3987	0.31	1.0	<5	100	-40+125

Dimensions (Table 1)

Type	L	W	T	a	B	C
A[0603]	1.60.15 [0.0630.006]	0.80.15 [0.0310.006]	0.80.15 [0.0310.006]	0.30.2 [0.0120.008]	[0.6-0.8]	[0.6-0.7]	[0.6-0.8]

Recommended Soldering Technologies

Re-flowing Profile

Ramp: 1~2/sec.
Pre-heating: 150~190/9030 sec.
Time above 240: 20~40 sec.
Peak temperature: 260Max./10 sec.
Solder paste: Sn/3.0Ag/0.5Cu
Max. 2 times for re-flowing.

Iron Soldering Profile

Iron soldering power: Max. 30W
Pre-heating: 150/60 sec.
Soldering Tip temperature: 350Max.
Soldering time: 3 sec Max.
Solder paste: Sn/3.0Ag/0.5Cu
Max. 1 time for iron soldering.

[Note: Take care not to apply the tip of the soldering iron to the terminal electrodes.]

Storage Conditions

Storage Temperature: -1040
Relative Humidity: 75%RH
Keep away from corrosive atmosphere and sunlight.
Period of Storage: 6 Months

Notes & Warnings

The series thermistors shall not be operated and stored under the following environmental conditions: Corrosive or deoxidized atmospheres, volatile or inflammable atmospheres, dusty condition, excessive high or low pressure, humid site, places with brine, oil, chemical liquid or organic solvent, intense vibration, or analogously deleterious conditions.
The ceramic body of the series thermistors is fragile; no excessive pressure or impact shall be exerted on it.
The series thermistors shall not be operated beyond the specified Operating Temperature Range in the catalog.