NTC THERMISTORS: TYPE NHQ
SURFACE MOUNT CHIP 1206 SIZE
DESCRIPTION:
A range of 1206 size surface mount NTC chip
thermistors.
DIMENSIONS:
0.5
±
0.3mm
FEATURES:
• Palladium silver electrodes with nickel barrier and
solder plating
• Intended for temperature measurement, control
and compensation
• Excellent solderabilty without ‘tombstoning’
• Suitable for standard soldering techniques
• Glass-coated ceramic between electrodes for
improved stability
• Supplied in tape-and-reel packaging
1.6
±
0.2mm
3.2 0.2mm
1.2mm
max
DATA:
Soldering Recommendations:
Maximum storage time in closed package....1 year
Maximum storage time exposed to ambient
conditions of I5°C - 30°C, 15% - 70% RH ...30 days
Drying prior to soldering: not to exceed 48h at 80°C
............................................ or 16h at 100°C
.............................................. or 8h at 125°C
Flux type .......................................... R or RMA
Flow soldering conditions:
Preheat temperature .................... 80° - 150°C
Max rate of change of temperature ....... 2.5°C/s
Max solder temperature ......................... 265°C
Max dwell time ........................................ 10s
Cooling in ambient or air flow of ............... 5m/s
Reflow soldering conditions:
Method ........................ infrared, hot gas, vapor
Max rate of change preheat temperature . 2.5°C/s
Max Temp ............................................ 225°C
Max time above 200°C ............................. 30s
Max radiant flux (0. 1 to 100W µ) ........ 5W/cm
2
Max hot air temperature ........... 275°C at 4 m/s
Cleaning:
Ultrasonic cleaning in methanol or isopropanol not
exceeding 40 kHz for 5 minutes or aqueous clean-
ing not exceeding 70°C for 7 minutes, is recom-
mended
Resistance tolerance at 25°C .................. ± 5%
........... (for± 10% replace R5 by R10 in code)
Tolerance on B value .......................... ±200 K
Minimum temperature ............................ -40°C
Maximum temperature .......................... 125°C
Dissipation factor ................................ 3mW/K
Time constant ..................................... 8s max
Code
NHQ101B280R5
NHQ501B325R5
NHQ801B325R5
NHQ102B325R5
NHQ152B345R5
NHQ202B410R5
NHQ222B410R5
NHQ252B410R5
NHQB410272R5
NHQ302B410R5
NHQ472B355R5
NHQ502B355R5
NHQ103B375R5
NHQ153B400R5
NHQ203B400R5
NHQ223B400R5
NHQ303B400R5
NHQ333B400R5
NHQ473B400R5
NHQ503B400R5
NHQ104B425R5
NHQ154B425R5
NHQ304B435R5
NHQ474B435R5
NHQ504B435R5
R25
Ω
100
500
800
1000
1500
2000
2200
2500
2700
3000
4700
5000
10000
15000
20000
22000
30000
33000
47000
50000
100000
150000
300000
470000
500000
B 25/85 K
2800
3250
3250
3250
3450
4100
4100
4100
4100
4100
3550
3550
3750
4000
4000
4000
4000
4000
4000
4000
4250
4250
4350
4350
4350
Data sheet D-NHQ-4
BOWTHORPE THERMOMETRICS
Crown Industrial Estate, Priorswood Rd
Taunton, Somerset TA2 8QY UK
Tel +44 (0)1823 335200
Fax +44 (0)1823 332637
Email: info@thermometrics.com
THERMOMETRICS, INC.
808 US Highway 1
Edison, New Jersey 08817-4695 USA
Tel +1 (732) 287 2870
Fax +1 (732) 287 8847
Email: sales@thmusa.com
KEYSTONE THERMOMETRICS CORP
967 Windfall Road
St Marys, Pennsylvania 15857-3397 USA
Tel +1 (814) 834 9140
Fax +1 (814) 781 7969
Email: sales@keystone-usa.com
DAEWOO THERMOMETRICS
#302 3rd floor Bethel Bldg,
324-1 Yangjae-dong, Seocho-Ku, Seoul, Korea
Tel +82 (0)2 5765232, 5233
Fax +82 (0)2 576 5234
Email: thmkorea@bora.dacom.co.kr
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