Littelfuse USBR Series Manual de usuario descargar pdf (Pagina 5)

Revised: July 12, 2010

POLYFUSE

Resettable PTCs

USBR Series

Radial Leaded > USBR Series

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com/series/USBR.html for current information.

USBR Series

Dimension EIA Mark IEC Mark

Dimensions

Dim. (mm) Tol. (mm)

Carrier tape width WW18 -0.5 / +1.0

Hold down tape width W

11 min.

Top distance between tape edges W

3 max.

Sprocket hole position W

9 -0.5 / +0.75

Sprocket hole diameter* D

4 -/+ 0.32

Abscissa to plane(straight lead) HH18.5 -/+ 3.0

Abscissa to plane(kinked lead) H

16 -/+ 0.5

Abscissa to top H

32.2 max.

Overall width w/o lead protrusion C

42.5 max.

Overall width w/ lead protrusion C

43.2 max.

Lead protrusion L

1.0 max.

Protrusion of cut out L L 11 max.

Protrusion beyond hold-down tape l

Not speciﬁed

Sprocket hole pitch P

12.7 -/+ 0.35

Pitch tolerance

consecutive

-/+ 1

Device pitch 12.7

Tape thickness tt0.9 max.

Tape thickness with splice t

2.0 max.

Splice sprocket hole alignment 0 -/+ 0.3

Body lateral deviation Δh Δh 0 -/+ 1.0

Body tape plane deviation Δp Δp 0 -/+ 1.3

Ordinate to adjacent component lead* P

3.81 -/+ 1.0

Lead spacing* FF5.08 -/+ 0.8

*Differs from EIA specification.

Tape and Ammo Speciﬁcations

Devices taped using EIA468-B/IE286-2 standards. See table below and Figure 1 for details.

Tape and Ammo Diagram

Reference plane

Δh

Δp

Direction of unreeling

Cross section A - B

Figure 1

1 2 3 4 5

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Littelfuse USBR Series Manual de usuario Pagina 5

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