Axial Leaded Glass Encapsulated Diode DO35 Shape NTC Thermistor Temperature Sensor, 50K Ohm, Beta B(25/50): 3950K, Operating Temperature Range -40C to +250C.

Name: NTC 50K Ohm Beta 3950K Axial Lead Glass Sealed - AMWEI Thermistor Sensor
Brand: AMWEI
Availability: InStock

AMWEI Product Code: AMF58-503F3950

Appearance Dimension

Axial Glass NTC Thermistor Temperature Sensor Dimension

Unit: mm

NTC Thermistor chip hermetically sealed in DO35 glass shell.
Tinned Dumet wire

Axial Glass NTC Thermistor Application

Axial lead glass encapsulated NTC thermistor used for high temperature measurement, sensing, monitoring, detection and control. Typical application such as industrial process control, HVAC, oven, office equipment, etc.

AMWEI Axial Glass Encapsulated NTC Thermistor Electric Characteristics Data

Resistance at 25C R25: 50K ohm+/-1%
Beta Value B(25/50): 3950K+/-1%
Optional R25 resistance tolerance, ±1%(F), ±2%(G), ±3%(H), or ±5%(J)
Dissipation Factor: δ≥2mW/℃
Thermal Time Constant (in still air): 12 seconds max.
Rated Power: ≤50mW
Insulation resistance: room temperature, 50VDC, 60 Seconds, ≥100MΩ.
Operating temperature range: -40 to +250C.

NTC 50K Ohm 3950K Resistance vs. Temperature RT Data

Temperature Centigrade	Resistance (K Ohm)	Temperature Centigrade	Resistance (K Ohm )	Temperature Centigrade	Resistance (K Ohm)
-40C	1592.690 KΩ	80C	6.227 KΩ	200C	0.304 KΩ
-35C	1146.593 KΩ	85C	5.297 KΩ	205C	0.276 KΩ
-30C	836.509 KΩ	90C	4.523 KΩ	210C	0.251 KΩ
-25C	618.146 KΩ	95C	3.876 KΩ	215C	0.229 KΩ
-20C	462.279 KΩ	100C	3.333 KΩ	220C	0.209 KΩ
-15C	349.530 KΩ	105C	2.876 KΩ	225C	0.191 KΩ
-10C	266.928 KΩ	110C	2.489 KΩ	230C	0.175 KΩ
-5C	205.694 KΩ	115C	2.162 KΩ	235C	0.161 KΩ
0C	159.805 KΩ	120C	1.884 KΩ	240C	0.148 KΩ
5C	125.077 KΩ	125C	1.646 KΩ	245C	0.136 KΩ
10C	98.562 KΩ	130C	1.443 KΩ	250C	0.125 KΩ
15C	78.156 KΩ	135C	1.269 KΩ
20C	62.339 KΩ	140C	1.119 KΩ
25C	50.000 KΩ	145C	0.989 KΩ
30C	40.318KΩ	150C	0.877 KΩ
35C	31.354 KΩ	155C	0.781 KΩ
40C	26.624 KΩ	160C	0.698 KΩ
45C	21.800 KΩ	165C	0.624 KΩ
50C	17.941 KΩ	170C	0.560 KΩ
55C	14.870 KΩ	175C	0.503 KΩ
60C	12.384 KΩ	180C	0.453 KΩ
65C	10.362 KΩ	185C	0.409 KΩ
70C	8.708 KΩ	190C	0.369 KΩ
75C	7.349 KΩ	195C	0.335 KΩ

Axial Leaded Glass Encapsulated NTC Thermistor Mechanical Test

Test	Standard	Test Conditions and methods	Requirements
Soldering & Solderability	IEC60068-2-20 Test Ta	Temperature: 230±5 ℃， 2-2.5mm away from ceramic body On: 2±0.5 Seconds.	The terminations shall be evenly tinned
Resistant to soldering heat	IEC60068-2-20 Test Tb	Temperature: 260±5℃, 2-2.5mm away from ceramic body On：10±1 Seconds.	No visible damage, ΔR25/R25≤3%
Lead wire tensile	IEC60068-2-21 Test U	Test Ua: Force 10N, On 10 Seconds; Test Ub: Bending 90C, Force 5N, Twice.	No break off, ΔR25/R25≤3%

Axial Leaded Glass Encapsulated NTC Thermistor Reliability Data

Test	Standard	Test Conditions	ΔR25/R25 (typical)	Remarks
Low temperature storage	IEC 60068-2-1	Storage at low category temperature: -30 ^oC, Time: 1000 hours	≤3%	No visible damage
Storage in dry heat	IEC 60068-2-2	Storage at upper category temperature: 200 ^oC, Time: 1000 hours	≤3%	No visible damage
Storage in damp heat, steady state (Humidity test)	IEC 60068-2-3	Temperature: 40^oC, Humidity:90%-95% RH, Duration:1000 hours	≤3%	No visible damage
Temperature cycling	IEC 60068-2-14	1. -30C/30 minutes 2. 80C/5 minutes 3. 200C/30 minutes 4. 80C/5 minutes. Number of cycles: 5 Cycles	≤3%	No visible damage

Axial Lead Glass Sealed NTC Thermistor Application Precaution

Minimum lead wire length tailored to shall be ≥8mm.
In lead wire bending, bending point shall be more than 2mm away from glass body part.

Mounting and Handling Recommendations

Excessive forces applied to a sensor may cause serious damage. To avoid this, the following recommendations should be adhered to:

No perpendicular forces must be applied to the body
During bending, the leads must be supported
Bending close to the body must be done very carefully
Axial forces to the body can influence the accuracy of the sensor and should be avoided
These sensors can be mounted on a minimum pitch of >5 mm

Soldering and Welding

Avoid any force on the body or leads during, or just after, soldering.
Do not correct the position of an already soldered sensor by pushing, pulling or twisting the body.
Prevent fast cooling after soldering.
For hand soldering, where mounting is not on a printed-circuit board, the soldering temperature should be <300C the soldering time <3 s and the distance between body and soldering point >1.5 mm.
For hand soldering, dip, wave or other bath soldering, mounted on a printed-circuit board, the
soldering temperature should be <300C, the soldering time <5 s and the distance between body and soldering point >1.5 mm.
The distance between the body and the welding point should be >0.5 mm. Care should be taken to ensure that welding current never passes through the sensor.