Axial Leaded Glass Encapsulated Diode DO35 Shape NTC Thermistor Temperature Sensor, 200K Ohm, Beta B(25/50): 4200K, Operating Temperature Range -40C to +250C.

AMWEI Product Code: AMF58-204G4200

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 200K B4200 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 200K B4200 Electric Characteristics Data

  • Resistance at 25C R25: 200K ohm+/-2%
  • Beta Value B(25/50): 4200K+/-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.

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 200K B4200 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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