MachineU > China Products > Consumer Electronic
temperature sensing chip Nanjing Shiheng Elec CMFA 503F3950 NTC thermistor for industrial applications
temperature sensing chip Nanjing Shiheng Elec CMFA 503F3950 NTC thermistor for industrial applications
Specifications
Resistance @ 25℃ :
50kΩ
Power(Watts) :
100mW
Operating Temperature :
-40℃~+125℃
Tolerance :
±1%
B Constant (25℃/100℃) :
-
Steady State Current (Max) :
130uA
Thermal Time Constant :
5s
B Constant (25℃/85℃) :
3987K
B Constant (25℃/75℃) :
-
B Constant Tolerance :
-
B Constant (25℃/50℃) :
3950K
Description :
NTC Thermistor 50kΩ Surface Mount 0603
Mfr. Part # :
CMFA 503F3950
Model Number :
CMFA 503F3950
Package :
0603
Description

Nanjing Shiheng Electronics Technology Co., Ltd. - Chip NTC Thermistor Datasheet

Product Overview
This document details the specifications for the CMFA series Chip NTC Thermistors manufactured by Nanjing Shiheng Electronics Technology Co., Ltd. These thermistors are designed for various applications requiring precise temperature sensing and control. Key features include high accuracy, stable performance, and a wide operating temperature range. They are suitable for use in electronic circuits where temperature monitoring is critical.

Product Attributes

  • Brand: Shiheng
  • Manufacturer: Nanjing Shiheng Electronics Technology Co., Ltd.
  • Product Type: Chip NTC Thermistor
  • Origin: China

Technical Specifications

Part Number: CMFA 503F3950

Date: 2021-08-21

General Specifications

Parameter Value Unit
Nominal Resistance at 25 (R25) 50 k
B Constant (25/50) 3950 K
B Constant (25/85) 3987 K
Permissible Operating Current at 25 0.13 mA
Dissipation Factor 1.0 mW/
Thermal Time Constant <5 s
Rated Electric Power at 25 100 mW
Operating Ambient Temperature -40 to +125

Dimensions (Fig. 1 & Table 1)

Type L W T a A B C
[0603] 0.063 0.006 [1.6 0.15] 0.031 0.006 [0.8 0.15] 0.031 0.006 [0.8 0.15] 0.012 0.008 [0.3 0.2] [0.6-0.8] [0.6-0.7] [0.6-0.8]

Product Identification Breakdown

Code Description
CMF Type: Chip NTC Thermistor
A External Dimensions (LW): 2.001.250.85 (for CMFA series)
503 Nominal Zero-Power Resistance at 25: 50k
F Tolerance of Resistance: 1%
3950 B Value Constant: 3950K

Test Conditions

Standard Atmospheric Conditions:
- Ambient Temperature: 2015
- Relative Humidity: 6520%
- Air Pressure: 86 kPa to 106 kPa

Conditions for Disputed Results:
- Ambient Temperature: 252
- Relative Humidity: 655%
- Air Pressure: 86 kPa to 106 kPa

Inspection Equipment

  • Visual Examination: 20 magnifier
  • Resistance value test: Thermistor resistance tester

Reliability Test Summary

Item Standard Requirements
Terminal Strength IEC 60068-2-21 No removal or split of the termination or other defects.
Resistance to Flexure IEC 60068-2-21 No visible damage. |R25/R25| 5%
Vibration IEC 60068-2-80 No visible damage.
Dropping IEC 60068-2-32 No visible damage.
Solderability IEC 60068-2-58 No visible damage; Wetting shall exceed 95% coverage.
Resistance to Soldering Heat IEC 60068-2-58 No visible damage. |R25/R25| 5%; |B/B| 2%
Temperature Cycling IEC 60068-2-14 No visible damage. |R25/R25| 3%; |B/B| 2%
Resistance to Dry Heat IEC 60068-2-2 No visible damage. |R25/R25| 5%; |B/B| 2%
Resistance to Cold IEC 60068-2-1 No visible damage. |R25/R25| 5%; |B/B| 2%
Resistance to Damp Heat IEC 60068-2-78 No visible damage. |R25/R25| 3%; |B/B| 2%
Resistance to High Temperature Load IEC 60539-1 5.25.4 No visible damage. |R25/R25| 5%; |B/B| 2%

Taping Specifications

Type Tape Thickness (mm) Tape Material Quantity per Reel
0201 0.5 0.15 Paper Tape 15K
X 0.5 0.15 Paper Tape 10K
A 0.8 0.15 Paper Tape 4K
A 0.85 0.2 Paper Tape 4K

Storage Conditions

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

Notes & Warnings

  • Do not operate or store under corrosive, deoxidized, volatile, inflammable, dusty, high/low pressure, humid conditions, or in places with brine, oil, chemical liquid, organic solvent, or intense vibration.
  • The ceramic body is fragile; avoid excessive pressure or impact.
  • Do not operate beyond the specified operating temperature range.

Recommended Soldering Technologies

Re-flowing Profile:
- Ramp: 1~2/sec.
- Pre-heating: 150~170/9030 sec.
- Time above 240: 20~40 sec.
- Peak temperature: 260 Max./10 sec.
- Solder paste: Sn/3.0Ag/0.5Cu
- Max. 2 times for re-flowing

Iron Soldering Profile:
- Iron soldering power: Max. 20W
- Pre-heating: 150/60sec.
- Soldering Tip temperature: 280 Max.
- 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.]

R-T Table (Partial Example)

Temperature (C) R_Min (Kohm) R_Cent (Kohm) R_Max (Kohm) Res TOL. Temp TOL.(C)
-40 1,649.637 1,726.374 1,806.500 4.64% 0.67
-39 1,543.253 1,613.954 1,687.726 4.57% 0.66
... ... ... ... ... ...
25 49.500 50.000 50.500 1.00% 0.23
... ... ... ... ... ...
125 1.631 1.705 1.781 4.47% 1.77

2410121534_Nanjing-Shiheng-Elec-CMFA-503F3950_C2889050.pdf
Send your message to this supplier
Send Now

temperature sensing chip Nanjing Shiheng Elec CMFA 503F3950 NTC thermistor for industrial applications

Ask Latest Price
Product Detail
Resistance @ 25℃ :
50kΩ
Power(Watts) :
100mW
Operating Temperature :
-40℃~+125℃
Tolerance :
±1%
B Constant (25℃/100℃) :
-
Steady State Current (Max) :
130uA
Contact Supplier
temperature sensing chip Nanjing Shiheng Elec CMFA 503F3950 NTC thermistor for industrial applications

Changsha Purple Horn E-Commerce Co., Ltd.

Verified Supplier
1 Years
hunan, changsha
Since 2009
Business Type :
Manufacturer, Distributor/Wholesaler, Agent, Importer
Main Products :
Analog and Digital Output, Pressure Sensors, Transducers, Sensor, Transducer Amplifiers
Employee Number :
300~500
Certification Level :
Verified Supplier
Discover similar products
View More

Find Similar Products By Category:

Supplier Homepage Products NTC Thermistors
MachineU China Products Consumer Electronic
Contact Supplier
Submit Requirement