Axial Leaded Glass Encapsulated Diode DO35 Shape NTC Thermistor Temperature Sensor, 200K Ohm, Beta B(25/50): 3899K, Operating Temperature Range -40C to +250C.

AMWEI Product Code: AMF58-204G3899

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: 200K ohm+/-2%
  • Beta Value B(25/50): 3899K+/-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 200K Ohm 3899K Resistance vs. Temperature RT Data

(K Ohm)
(K Ohm )
(K Ohm)
-40C 5904.6812 KΩ 80C 27.5128 KΩ 200C 1.2687 KΩ
-35C 4348.6465 KΩ 85C 22.0580 KΩ 205C 1.1556 KΩ
-30C 3144.8796 KΩ 90C 18.8536 KΩ 210C 1.0553 KΩ
-25C 2320.0264 KΩ 95C 16.1746 KΩ 215C 0.9662 KΩ
-20C 1760.4601 KΩ 100C 13.9264 KΩ 220C 0.8868 KΩ
-15C 1367.0424 KΩ 105C 12.0329 KΩ 225C 0.8159 KΩ
-10C 1076.2418 KΩ 110C 10.4325 KΩ 230C 0.7524 KΩ
-5C 851.5250 KΩ 115C 9.0752 KΩ 235C 0.6955 KΩ
0C 672.9399 KΩ 120C 7.9200 KΩ 240C 0.6443 KΩ
5C 529.6061 KΩ 125C 6.9337 KΩ 245C 0.5982 KΩ
10C 415.0318 KΩ 130C 6.0889 KΩ 250C 0.5566 KΩ
15C 324.5364 KΩ 135C 5.3629 KΩ
20C 254.0953 KΩ 140C 4.7372 KΩ
25C 200.0000 KΩ 145C 4.1963 KΩ
30C 158.8782KΩ 150C 3.7274 KΩ
35C 127.7940 KΩ 155C 3.3196 KΩ
40C 104.3055 KΩ 160C 2.9641 KΩ
45C 86.4564 KΩ 165C 2.6382 KΩ
50C 72.7196 KΩ 170C 2.3553 KΩ
55C 61.9211 KΩ 175C 2.1092 KΩ
60C 53.1649 KΩ 180C 1.8945 KΩ
65C 45.7722 KΩ 185C 1.7065 KΩ
70C 39.2403 KΩ 190C 1.5417 KΩ
75C 33.2210 KΩ 195C 1.3966 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,
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,

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: 40oC,
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. 

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