NTC thermistor diameter of 0.8 MM
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1. Scope NTC
| This specifications cover shape, dimensions, electric characteristics etc for |
| FWTG2-1-3950F-104F-25 |
2. Part number system
| Sensor Type | FWG2-1 | ||||||||||||||||||
| B Constant | 395 | 395 | = | 3950K | |||||||||||||||
| B Constant Tolerance | F | F/3=±0.3%, F/2=±0.5%, D=±0.75%, F=±1.0%, G=±2%, H=±3%, J=±5% | |||||||||||||||||
| Resistance at 25℃ | 104 | 100K | kohm | ||||||||||||||||
| Resistance tolerance | F | F/3=±0.3%, F/2=±0.5%, D=±0.75%, F=±1.0%, G=±2%, H=±3%, J=±5% | |||||||||||||||||
| Drawing No. | 25 | / | |||||||||||||||||
3. Electrical Characteristics
| Item | Particular | Mark | Char. | Unit | Tol | |||||||||||||
| Resistance（Rs) | Resistance at | 25 ℃ | ( in liquid ) | R 25 | 100.00 | Ω | ± 1.0% | |||||||||||
| Resistance(re.) | Resistance at | 100 ℃ | ( in liquid ) | R 100 | 6.576 | Ω | ± -4% | |||||||||||
| B Constant | B value between t1 and t2 ℃ | B25/50 | 3950 | K | ± 1.0% | |||||||||||||
| Bt1-t2 = | Ln(Rt1/Rt2) / [ 1/(t1+273.15)-(1/t2+273. | |||||||||||||||||
| The time required foe the temperature of a thermi | ||||||||||||||||||
| Thermal time constant. | to change into 63.2% of temp. range: 0-> 25℃ | τ | 2 | sec | approx. | |||||||||||||
| ( in stirred air) | ||||||||||||||||||
| Dissipation constant | in still air | δ | 0.4 | ㎽/K | Max. | |||||||||||||
| Operating Temp range | -50 ~ | 350 | ℃ | - | ||||||||||||||
| The maximum power rating | in still air | 15mW | ||||||||||||||||
| Insulation resistance | 500VDC. in air | 50MΩ Min | ||||||||||||||||
| The maximum current rating | in still air | 2mA | ||||||||||||||||
| The maximum operating | in still air,The current for the resistance | 0.1A | ||||||||||||||||
| current | change not to 2% | by self heating | ||||||||||||||||
4. Reliability chracteristics
| Testing item | Test Conditions | Changing ratio after test | ||||||
| 4-1 High temp. aging test | Exposed in air at 200±5℃ for 1000hrs ± 4hrs. | ΔRT | ≤ ±3% | |||||
| ΔB ≤ ±2% | ||||||||
| 4-2 Low temp. aging test | Exposed in air at -50±5℃ for 1000 Hrs ± 4hrs. | ΔRT | ≤ ±3% | |||||
| ΔB ≤ ±2% | ||||||||
| 4-3 Heat cycle test | Following temp. cycle 1000 cycles continuously | ΔRT | ≤ ±3% | |||||
| -30±5℃(In air,15min) | ⇔ Room Temp.(max 5min) | ΔB ≤ ±2% | ||||||
| ⇔ 200±5℃(in air,15min) | ||||||||
| 4-4 Free fall | After three times natural fall to a maple board from 1m high, | ΔRT | ≤ ±3% | |||||
| there should be no visible damage. | ΔB ≤ ±2% | |||||||
| 4-5 vibration test | Frequency range : 5-50HZ , Amplitude: 7.0mm ,3g, | ΔRT | ≤ ±3% | |||||
| Duration: 1 day | ΔB ≤ ±2% | |||||||
| 4-6 Life test | Store | in 95%RH，60℃,DC5V, air conditions for 10000hrs | ΔR25 | ≤ ±3% | ||||
| ΔB ≤ ±2% | ||||||||
| 4-7 Waterproof test | Store | in water，70℃ , for 4000hrs | ΔRT | ≤ ±3% | ||||
| ΔB ≤ ±2% | ||||||||
| 4-8 Salt spray test | Pull 49N static weight in the direction of terminal ,for 10s | ΔRT | ≤ ±3% | |||||
| ΔB ≤ ±2% | ||||||||
5. Inspection standard
Products is inspected by landom sampling inspection plan.
| 5-1 | Sampling inspection standard | ||||
| 5-2 | Sampling inspection type | ||||
| 5-3 | Acceptable quality level | ||||
| Inspection item | Level | AQL | |||
| Resistance | |||||
| BELLOW 50KP : n=32(C=0), 50 ~ 100KP : n=64(c=0) | |||||
| B Constant | ABOVE 100KP:n=96(c=0) | ||||
| Shape & Dimensions | n=10(c=0) | ||||
| Appearance | G-II | 1.0%(c=0) | |||
6. Packing & Marking
6-1 Packing
Packing and package shall be enough so that damage or soil will not be caused by transporting. See attached Taping & Packing spec
6-2 Marking
Shall be marked P/N, Quantity,DATE, Lot No. etc on packing box.
7. Appendix
| 7-1 | : Drawing | |||||||
| 7-2 | : R-T TableRt=Rs * exp( A+B/T+C/T^2+D/T^3), T in degrees Kelvin | |||||||
| A= | -13.738 | |||||||
| B= | 3621.962 | |||||||
| C= | 345637.777 | |||||||
| D= | -60908403.697 | |||||||
8. Appendix
| TYPE | A(mm) | B(mm) | D(mm) |
| FWG2-1 | 1.25 | 2.5MAX | 0.25 |
| FWG2-2 | 2.00 | 4MAX | 0.3 |
| FWG2-3 | 0.85 | 2.0MAX | 0.15 |
NTC thermistor diameter of 0.8 MM FUWEN shenzhen rich temperature sensing technology co., LTD
