Temperature Measurement Leadless Disks
Temperature Measurement Leadless Disks
Applications
I Automotive electronics, e.g.
B57220 K 220
– measurement of cooli...
Description
Temperature Measurement Leadless Disks
Applications
I Automotive electronics, e.g.
B57220 K 220
– measurement of cooling water and oil temperature Features
I Thermistor disk with lapped, coplanar
front surfaces
I Front surfaces silver-plated I For clamp contacting I UL approved type (up to 125 °C operating temperature)
Termination D = 2,9 ± 0,3 mm L = 1,3 ± 0,3 mm Approx. weight 50 mg
Options Alternative resistance ratings, rated temperatures and resistance tolerances available on request Delivery mode Bulk
Climatic category (IEC 60068-1) Max. power at 25 °C Resistance tolerance Rated temperature B value tolerance Dissipation factor (in air) Thermal cooling time constant (in air) Heat capacity
P25 ∆R N/R N TN ∆B/B δth1) τc1) Cth1)
55/250/21 180 ±5% 20 ± 1,5 % approx. 2,5 approx. 12 approx. 30
mW
°C
mW/K s mJ/K
R 20
R25
No. of R /T characteristic 1008
B25/100 K 3560
Ordering code
Ω
2,5 k
Ω
2056,9
B57220K0212A003
1) Depends on mounting situation
66
05/02
Temperature Measurement Leadless Disks
Reliability data Test Storage in dry heat Storage in damp heat, steady state Rapid temperature cycling Endurance Long-term stability (empirical value) Standard IEC 60068-2-2 IEC 60068-2-3 Test conditions Storage at upper category temperature T: 250 °C t: 1000 h Temperature of air: 40 °C Relative humidity of air: 93 % Duration: 21 days
B57220 K 220
∆R 25/R25 (typ.) Remarks
<3% No visible damage No visible damage No visible damage No visible damage No visible damage
...
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