Model

Marking

Ihold

Itrip

Vmax

Imax

Pd max

Current

Time

Rmin

Rmax

(A)

(A)

(Vdc)

(A)

(w)

(A)

(S)

(

Ω)

(

Ω)

USM005

A

0.05

0.15

30

100

0.6

0.25

1.5

2.800

50.000

USM010

B

0.10

0.30

30

100

0.6

0.5

0.60

0.800

15.000

USM020

C

0.20

0.40

30

100

0.6

8.0

0.02

0.400

5.000

USM035

D

0.35

0.75

6

100

0.6

8.0

0.2

0.200

1.300

USM050

F

0.50

1.00

13.2

100

0.6

8.0

0.1

0.180

0.900

USM075

G

0.75

1.50

6

100

0.6

8.0

0.1

0.070

0.400

USM110

H

1.10

2.20

6

100

0.6

8.0

0.3

0.050

0.210

USM150

L

1.50

3.00

6

100

0.6

8.0

0.5

0.030

0.110

Ihold

Itrip

Vmax

Imax

Pd

Rmin/max

R1max

*CAUTION

Model

—40℃

—20℃

0℃

25℃

40℃

50℃

60℃

70℃

85℃

USM005

0.080

0.07

0.070

0.05

0.040

0.04

0.03

0.03

0.020

USM010

0.16

0.14

0.12

0.10

0.080

0.07

0.06

0.05

0.03

USM020

0.29

0.26

0.22

0.20

0.160

0.14

0.13

0.11

0.08

USM035

0.47

0.45

0.40

0.35

0.330

0.28

0.24

0.21

0.18

USM050

0.76

0.67

0.58

0.50

0.430

0.40

0.36

0.32

0.28

USM075

1.00

0.97

0.86

0.75

0.640

0.59

0.54

0.48

0.40

USM110

1.69

1.48

1.29

1.10

0.880

0.76

0.65

0.57

0.43

USM150

2.13

1.92

1.71

1.50

1.260

1.14

1.01

0.89

0.71

Hold Current:Maximum current device will not trip in 25℃ still air.

Maximum resistance of device at 25℃ measured one hour after trippde tripping.

Operation beyond the specified rating may result in damage and possible arcing.

Maximum operating volatge device can withstand without damage at ratde current(imax)

.

Maximum fault current device can withstand without damage at rated voltage(Vmax).

Electrical characteristics(25℃)

Typical power dissipatde from device when in the tripped state in 25℃ still air.

Minimum/Maximum device resistance prior to tripping at 25℃.

maximun ambient operating temperature(Tmao)vs.hold current(Ihold)

Ihold versus tempetature

Trip current:Minimum current at which the device will always trip in 25℃ still air

Maximum Time To Trip

Resistance

Thermal Derating Curve

Typical Time-To-Trip At 25°C

Derating Curves for SMD1210 Series

0

20

40

60

80

100

120

140

160

-40

-20

0

20

40

60

80

Temperature (°C)

Average Time Current Curves

0.01

0.1

1

10

100

0.1

1

10

Current In Amperes

0.75

0.05

A

0.20

A

0.35

A

0.50

A

4500pcs/Reel

Package Information

Reel:

USM005～035

4500pcs/Reel

USM050～075

4000pcs/Reel

PPTC/USM Series

02 | www.spsemi.cn

USM110

USM200

～

USM175

N

1.75

3.50

6

100

0.8

8.0

0.6

0.020

0.080

USM200

S

2.00

4.00

6

100

0.8

8.0

1.0

0.015

0.070

USM175

2.54

2.30

2.02

1.75

1.470

1.33

1.18

1.05

0.86

USM200

2.90

2.63

2.31

2.00

1.680

1.52

1.35

1.20

0.98

REV.2014.05.01