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©2006 Littelfuse

ST Series

Specifications are subject to change without notice.



Electronics Designers Guide

Axial Leaded Strap

Environmental Specifications

Operating/Storage

Temperature

-40°C to +85°C

Maximum Device Surface

Temperature in Tripped State

125°C

Passive Aging

+70°C, 1000 hours

±5% typical resistance change

Humidity Aging

+85°C, 85%R.H. 7days

±5% typical resistance change

Vibration

MIL-STD-883C, Condition A

No change

Physical Specifications

Lead Material

0.13mm nominal thickness,

quarter-hard nickel

Insulating Material Polyester tape

Part Marking System

QUANTITY CODE: U = 500 (bulk)

VOLTAGE RATING (VDC)

SERIES

HOLD CURRENT (VALUE DIVIDED BY 100 = HOLD CURRENT IN AMPS)

LEAD OPTIONS: Blank = standard

S = slit lead

15 ST 175 S U

Packaging

Dimensions

E

B

D1

D2

C

A

SLIT

E

B

D1

D2

C

A

NOMINAL

0.5 x 4.0

(.02”x .15”)

Figure 1

Figure 2

Lot Number

(Contact Littelfuse

for additional

information)

Marking

Marking

ST

120

XX9U

Product Series

Current Rating

Littelfuse

Trademark

Top Side

Part

Number

A

B

C

D1

D2

E

Fig.

Inches

mm

Inches

mm

Inches

mm

Inches mm Inches mm

Inches

mm

Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min. Min. Min.

Min Max. Min. Max.

15ST120

0.78

0.87

19.9

22.1

0.19

0.20

4.9

5.2

0.02

0.04

0.6

1

0.22

5.5

0.22

5.5

0.01

0.22

3.9

4.1

1

15ST120S 0.78

0.87

19.9

22.1

0.19

0.20

4.9

5.2

0.02

0.04

0.6

1

0.22

5.5

0.22

5.5

0.01

0.22

3.9

4.1

2

15ST175

0.82

0.91

20.9

23.1

0.19

0.20

4.9

5.2

0.02

0.04

0.6

1

0.16

4.1

0.16

4.1

0.01

0.16

3.9

4.1

1

15ST175S 0.82

0.91

20.9

23.1

0.19

0.20

4.9

5.2

0.02

0.04

0.6

1

0.16

4.1

0.16

4.1

0.01

0.16

3.8

4.2

2

E

B

D1

D2

C

A

SLIT

E

B

D1

D2

C

A

NOMINAL

0.5 x 4.0

(.02”x .15”)

Figure 1

Figure 2

Lot Number

(Contact Littelfuse

for additional

information)

Marking

Marking

ST

120

XX9U

Product Series

Current Rating

Littelfuse

Trademark

Top Side

Part Numbering System

I

hold

(A)

Packaging

Option

Quantity

Quantity &

Packaging Codes

All Ratings

Bulk

500

U