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Specifications
Resistance @ 25℃:
10kΩ
Power(Watts):
100mW
Operating Temperature:
-40℃~+125℃
Tolerance:
±1%
B Constant (25℃/100℃):
-
Steady State Current (Max):
440uA
Thermal Time Constant:
5s
B Constant (25℃/85℃):
3435K
B Constant (25℃/75℃):
-
B Constant Tolerance:
-
B Constant (25℃/50℃):
3380K
Mfr. Part #:
CMFB 103F3435
Package:
0805
Key Attributes
Model Number:
CMFB 103F3435
Product Description
NTC Thermistors - Chip Type
Product Overview
This product is a chip-type NTC thermistor manufactured by Nanjing Shiheng Electronics Technology Co., Ltd. Designed for precise temperature sensing and resistance control, these thermistors offer reliable performance in various electronic applications. Their compact chip form factor makes them suitable for space-constrained designs, providing accurate resistance values across a specified temperature range.
Product Attributes
- Brand: Shiheng
- Origin: Nanjing, China
- Type: Chip NTC Thermistor
Technical Specifications
| Part Number | Type | Nominal Zero-Power Resistance at 25 (k) | Tolerance of Resistance | B Constant (25/50) (K) | External Dimensions (LW) (mm) | Rated Power at 25 (mW) | Operating Ambient Temperature () |
|---|---|---|---|---|---|---|---|
| CMFB 103F3435 | CMFB | 10 k | 5% (J) | 3435 K | 2.01.2 (B) | 100 | -40+125 |
Dimensions (Table 1)
| Type | L (mm) | W (mm) | T (mm) | a (mm) | b (mm) | c (mm) |
|---|---|---|---|---|---|---|
| 0805 [2012] | 2.00.2 | 1.250.2 | 0.850.2 | 0.50.3 | 0.6-0.7 | 1.0-1.2 |
Electrical Characteristics (CMFB 103F3435)
| Resistance (25) (k) | 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 () |
|---|---|---|---|---|---|---|---|
| 10 | 3380 | 3435 | 0.44 | 1.0 | <5 | 100 | -40+125 |
Test Conditions
- Standard Atmospheric Conditions: Ambient Temperature 2015, Relative Humidity 6520%, Air Pressure 86 kPa~106 kPa.
- Alternative Conditions (for dispute resolution): Ambient Temperature 202, Relative Humidity 655%RH, Air Pressure 86kPa ~ 106kPa.
Inspection Equipment
- Visual Examination: 20 magnifier
- Resistance value test: Thermistor resistance tester
Reliability Test Summary
| Item | Standard | Requirement |
|---|---|---|
| Terminal Strength | IEC 60068-2-21 | No removal or split of the termination or other defects shall occur. (5N for 0201-0603, 10N for 0805) |
| Resistance to Flexure | IEC 60068-2-21 | No visible damage. R25 variation: within 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 variation: within 3%. B constant variation: within 2%. |
| Temperature Cycling | IEC 60068-2-14 | No visible damage. R25 variation: within 3%. B constant variation: within 2%. |
| Resistance to Dry Heat | IEC 60068-2-2 | No visible damage. R25 variation: within 5%. B constant variation: within 2%. (1000h at 125) |
| Resistance to Cold | IEC 60068-2-1 | No visible damage. R25 variation: within 5%. B constant variation: within 2%. (-40 for 1000h) |
| Resistance to Damp Heat | IEC 60068-2-78 | No visible damage. R25 variation: within 3%. B constant variation: within 2%. (1000h at 40, 90-95%RH) |
| Resistance to High Temperature Load | IEC 60539-1 5.25.4 | No visible damage. R25 variation: within 5%. B constant variation: within 2%. (1000h at 85 with operating current) |
Storage Conditions
- Storage Temperature: -1040
- Relative Humidity: 75%RH
- Avoid corrosive atmosphere and sunlight.
- Period of Storage: 6 Months
Notes & Warnings
- Do not operate or store in corrosive or deoxidized atmospheres, volatile or inflammable atmospheres, dusty conditions, excessive high or low pressure, humid sites, places with brine, oil, chemical liquid or 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: 150~190/9030 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. 30W
- Pre-heating: 150/60 sec.
- Soldering Tip temperature: 350 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 () | R_Min (Kohm) | R_Cent (Kohm) | R_Max (Kohm) | Resistance Tolerance (%) | Temperature Tolerance () |
|---|---|---|---|---|---|
| -40 | 189.674 | 197.390 | 205.400 | 4.06% | 0.69 |
| 25 | 9.900 | 10.000 | 10.100 | 1.00% | 0.27 |
| 125 | 0.512 | 0.532 | 0.554 | 4.01% | 1.82 |
2410121439_Nanjing-Shiheng-Elec-CMFB-103F3435_C2889056.pdf
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