Type HM Specifications

Leadless chip thermistor

Description

Top and bottom electrode, uncoated chip thermistors

without leads.

Options

Consult Thermometrics for availability of options

• Other resistance values in the range of 100 Ω to

100 kΩ

• Other tolerances

• Other reference temperature

• Gold electrodes suitable for wire bonding

• Other sizes

Data

Thermal and Electrical Properties

• Dissipation constant: (still air) 7 to 15 mW/K

• Thermal time constant: (still air) 10 to 45 seconds

• The thermal time constant and dissipation

constant values are dependent upon the method

of mounting. The above values represent the range

of smallest to largest HM thermistor chips when

soldering to an aluminum substrate 0.025 in (0.635

Select appropriate part number below for resistance and temperature tolerance desired.

R25°C

Material

System

Width “W”

in

(mm)

Length “L”

in

(mm)

Thick “T”

in

(mm)

R25° ± 5%

R25° ± 10%

2252

F

0.070

(1.778)

0.070

(1.778)

0.010

(0.254)

HM70NF232J

HM70NF232K

2252

F

0.085

(2.159)

0.085

(2.159)

0.015

(0.380)

HM85NF232J

HM85NF232K

3000

F

0.060

(1.523)

0.060

(1.523)

0.010

(0.254)

HM60NF302J

HM60NF302K

3000

F

0.075

(1.904)

0.075

(1.904)

0.015

(0.380)

HM75NF302J

HM75NF302K

5000

F

0.050

(1.27)

0.050

(1.27)

0.010

(0.254)

HM50NF502J

HM50NF502K

5000

F

0.060

(1.523)

0.060

(1.523)

0.015

(0.380)

HM60NF502J

HM60NF502K

10000

F

0.035

(0.889)

0.035

(0.889)

0.010

(0.254)

HM35NF103J

HM35NF103K

10000

F

0.040

(1.016)

0.045

(1.1429)

0.015

(0.380)

HM40NF103J

HM40NF103K

10000

Y

0.045

(1.1429)

0.045

(1.1429)

0.010

(0.254)

HM45NY103J

HM45NY103K

10000

Y

0.055

(1.397)

0.055

(1.397)

0.015

(0.380)

HM55NY103J

HM55NY103K

30000

H

0.025

(0.635)

0.025

(0.635)

0.010

(0.254)

HM25NH303J

HM25NH303K

30000

H

0.030

(0.7619)

0.035

(0.889)

0.015

(0.380)

HM30NH303J

HM30NH303K

100000

Y

0.030

(0.7619)

0.030

(0.7619)

0.010

(0.254)

HM30NY104J

HM30NY104K

100000

Y

0.035

(0.889)

0.035

(0.889)

0.015

(0.380)

HM35NY104J

HM35NY104K

T

L

W

NTC Type HM dimensions