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B57220K821J

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
NTC thermistors for
temperature measurement
Leadless NTCs
Series/Type: B57220K
Date: March 2013
© EPCOS AG 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
1) Depends on mounting situation
Applications
Temperature measurement and
compensation
Features
Front surfaces silver-plated
For clamp contacting
UL approval (E69802)
Options
Alternative resistance ratings, rated
temperatures and resistance tolerances
available on request.
Delivery mode
Bulk
Dimensional drawing
∅d = 2.9 ±0.3 mm
th = 1.3 ±0.3 mm
Approx. weight 50 mg
General technical data
Climatic category (IEC 60068-1) 55/250/21
Max. power (at 25 °C) P
25
180 mW
Resistance tolerance ∆R
R
/R
R
±5 %
Rated temperature T
R
20 °C
Dissipation factor (in air) δ
th
1)
approx. 2.5 mW/K
Thermal cooling time constant (in air) τ
c
1)
approx. 12 s
Heat capacity C
th
1)
approx. 30 mJ/K
Electrical specification and ordering codes
R
20
Ω
R
25
Ω
No. of R/T
characteristic
B
25/100
K
Ordering code
2.5 k 2056.9 1008 3560 ±1.5% B57220K0212A003
Temperature measurement and compensation B57220K
Leadless NTCs K220
Page 2 of 17Please read Cautions and warnings and
Important notes at the end of this document.
Reliability data
Test Standard Test conditions ∆R
25
/R
25
(typical)
Remarks
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 250 °C
t: 1000 h
< 3% No visible
damage
Storage in damp
heat, steady state
IEC
60068-2-78
Temperature of air: 40 °C
Relative humidity of air: 93%
Duration: 21 days
< 3% No visible
damage
Rapid temperature
cycling
IEC
60068-2-14
Lower test temperature: 55 °C
Upper test temperature: 155 °C
Number of cycles: 100
< 3% No visible
damage
Endurance P
max
: 180 mW
t: 1000 h
< 3% No visible
damage
Long-term stability
(empirical value)
Temperature: 70 °C
t: 10000 h
< 5% No visible
damage
Note
Contact of NTC thermistors with any liquids and solvents shall be prevented. It must be
ensured that no water enters the NTC thermistors (e.g. through plug terminals).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Temperature measurement and compensation B57220K
Leadless NTCs K220
Page 3 of 17Please read Cautions and warnings and
Important notes at the end of this document.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

B57220K821J

Mfr. #:
Buy B57220K821J
Manufacturer:
EPCOS / TDK
Description:
NTC Thermistors NTC Thermistor K 220/820 /J 5%
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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