NTC thermistor diameter of 0.8 MM

类型分类：: 科普知识

数据分类：: NTC温度变送器

NTC thermistor diameter of 0.8 MM

发布日期：2022-04-17 点击率：47

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

3950K

B Constant Tolerance

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/3=±0.3%, F/2=±0.5%, D=±0.75%, F=±1.0%, G=±2%, H=±3%, J=±5%

Drawing No.

3. Electrical Characteristics

Item

Particular

Mark

Char.

Unit

Tol

Resistance（Rs)

Resistance at

25 ℃

( in liquid )

R 25

100.00

± 1.0%

Resistance(re.)

Resistance at

100 ℃

( in liquid )

R 100

6.576

± -4%

B Constant

B value between t₁ and t₂ ℃

B25/50

3950

± 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℃

sec

approx.

( in stirred air)

Dissipation constant

in still air

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.			ΔR_T	≤ ±3%
				ΔB ≤ ±2%
4-2 Low temp. aging test	Exposed in air at -50±5℃ for 1000 Hrs ± 4hrs.			ΔR_T	≤ ±3%
				ΔB ≤ ±2%
4-3 Heat cycle test	Following temp. cycle 1000 cycles continuously			ΔR_T	≤ ±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,			ΔR_T	≤ ±3%
	there should be no visible damage.			ΔB ≤ ±2%
4-5 vibration test	Frequency range : 5-50HZ , Amplitude: 7.0mm ,3g,			ΔR_T	≤ ±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		ΔR_T	≤ ±3%
				ΔB ≤ ±2%
4-8 Salt spray test	Pull 49N static weight in the direction of terminal ,for 10s			ΔR_T	≤ ±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)
			n=10(c=0)

		Appearance	G-II	1.0%(c=0)
			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

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