NB21PC0472JBB AVX Corporation, NB21PC0472JBB Datasheet - Page 25

• Manufacturer Part Number: NB21PC0472JBB
• Description: THERM NTC 4.7KOHM 5% 0603 SMD
• Manufacturer: AVX Corporation
• Series: NB21r
• Type: NTCr

Specifications of NB21PC0472JBB

• Resistance In Ohms @ 25°c: 4.7K
• Resistance Tolerance: ±5%
• B Value Tolerance: ±3%
• B25/85: 4220K
• Operating Temperature: -55°C ~ 150°C
• Power - Max: 120mW
• Mounting Type: Surface Mount
• Package / Case: 0603 (1608 Metric)
• Description Of Terminals: Leadless
• Mounting Style: Surface Mount
• Pin Count: 2
• Screening Level: Military
• Resistance @ 25c: 4.7kohm
• Percentage Of Resistance Tolerance @ 25c: ±5
• Operating Temperature Min Deg. C: -55C
• Operating Temperature Max Deg. C: 150C
• Product Length (mm): 1.6mm
• Product Height (mm): 0.8mm
• Product Depth (mm): 0.8mm
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• B0/50: -
• B25/50: -
• B25/75: -
• B25/100: -
• Lead Length: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

NTC Leadless Disc Thermistors
This type of product is widely used in automotive and
consumer applications.
They are assembled in custom-probes for sensing the
temperature of liquids (water, oil, ...), gases or surface of any
other component.
DESIGN OF THE THERMISTOR
Choice of the resistances
If the application is to measure the temperature around a
defined point, a unique nominal resistance can be chosen
(for example, among standard values of the ND range prod-
ucts presented on pages 16 to 21).
When it is required to measure the temperature over selected
ranges T
R
on the R (T) characteristic of an existing NTC material
(for example among standard materials whose R (T) are
displayed on pages 32 to 35).
The resistances must also be compatible with the resistivity
of the material and the dimensions of the thermistor.
HOW TO ORDER
22
1
Marking
Operating temperature
Values and tolerances
Physical data (dim. in mm)
, R
2
, R
1
–T
3
NR55 -
2
, ..., must be such that they can be located
Type
, T
Types
2
–T
3
, ..., the corresponding resistance
- 3002 - 99
P/N Code
TPC
Custom - designed products defined with:
On package only / On parts upon request
The metallization covers completely the surfaces of the
thermistor.
The particularly flat and smooth surfaces ensure an excellent
electrical and thermal contact under pressure.
Choice of the tolerances
The precision of the temperature measurement determines
the calculation of the tolerance on the resistance:
For example, the NTC NR55--3049-99, using “N5” material
(R (T) characteristic displayed on page 34), requires a preci-
sion of 1°C over the temperature range 110°C - 120°C.
The tolerances can be calculated:
*For your specific requirements, please consult us.
R/R =
R
R
110°C
120°C
/R
/R
-40°C to +200°C
D ± D R
E ± E R
(%/°C). T (°C)
D
110°C
120°C
NR
= 1°C* 2.91%/°C = 2.91%
= 1°C* 2.76%/°C = 2.76%
Metallization
1
2
± R
± R
1
2
/R
/R
1
2
E
at T
at T
1
2
, . . .