Littelfuse 437 Series Manual de usuario descargar pdf (Pagina 1)

Speciﬁcations are subject to change without notice.

Revised: 12/19/13

Surface Mount Fuses

Ceramic Fuse > 437 Series

437 Series – 1206 Fast-Acting Fuse

Description

This 100% Lead-free, RoHS compliant and Halogen-free

fuse series has been designed speciﬁcally to provide over

current protection to circuits that see high working ambient

temperatures (up to 150ºC).

The general design ensures excellent temperature stability

and performance reliability.

In addition to this, the high I²t values typical of the

Littelfuse Ceramic Fuse family ensure high inrush current

withstand capability.

Agency Approvals

AGENCY AGENCY FILE NUMBER AMPERE RANGE

E10480 0.250A ~ 8A

LR29862 0.250A ~ 8A

Features

Electrical Characteristics for Series

• OperatingTemperature

from -55ºC to +150ºC

• 100%Lead-freeand

RoHS compliant

• Suitableforbothleaded

and lead-free reﬂow /

wave soldering

% of Ampere

Rating

Ampere Rating Opening Time at 25ºC

100% 250mA - 8A 4 hours, Minimum

250% 750mA - 8A 5 seconds, Maximum

350% 250mA -500mA 5 seconds, Maximum

350% 750mA - 8A 1 second, Maximum

Applications

Ampere

Rating

(A)

Amp

Code

Max.

Voltage

Rating (V)

Interrupting Rating

Nominal

Resistance

(Ohms)

Nominal

Melting I

Sec.)

Nominal Voltage

Drop At Rated

Current (V)

Nominal Power

Dissipation At

Rated Current (W)

Agency Approvals

250mA .250 125

50 A @ 125 V AC/DC

2.290 0.003 0.78 0.195 x x

375mA .375 125 1.330 0.010 0.60 0.225 x x

500mA .500 63

50 A @ 63 V AC/DC

0.908 0.018 0.52 0.260 x x

750mA .750 63 0.665 0.064 0.45 0.335 x x

1A 0 01. 63 0.360 0.100 0.41 0.415 x x

1.25A 1.25 63 0.318 0.256 0.40 0.496 x x

1.5A 01. 5 63 0.209 0.324 0.39 0.579 x x

1.75A 1.75 63 0.0703 0.075 0.27 0.474 x x

2A 002. 63 0.058 0.144 0.17 0.345 x x

2.5A 02.5 32

50 A @ 32 V AC/35 V DC

0.043 0.225 0.14 0.363 x x

3A 003. 32 0.033 0.400 0.15 0.462 x x

3.5A 03.5 32 0.027 0.576 0.16 0.560 x x

4A 004. 32 0.022 1.024 0.16 0.618 x x

5A 005. 32 0.016 1.936 0.09 0.484 x x

7A 0 0 7. 32 0.010 4.900 0.11 0.760 x x

8A 008. 32 0.0084 6.400 0.067 0.539 x x

Electrical Speciﬁcations by Item

Notes:

1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting

Rating tested at rated voltage with time constant < 0.8 msec.

2. Nominal Resistance measured with < 10% rated current.

3. Nominal Melting I²t measured at 1 msecs. opening time.

4. Nominal Voltage Drop measured at rated current after temperature has stabilized.

• LCDDisplays

• Servers

• Printers

• Scanners

• DataModems

Devices designed to carry rated current for 4 hours minimum. It is recommended that

devices be operated continuously at no more than 80% rated current. See “Temperature

Rerating Curve”for additional rerating information.

Devices designed to be mounted with marking code facing up.

Additional Information

Datasheet

Samples

Resources

1 2 3

Indice de contenidos

Pagina 1 - Surface Mount Fuses

Pagina 2 - Ceramic Fuse > 437 Series

Pagina 3

Comentarios a estos manuales

Sin comentarios

Littelfuse 437 Series Manual de usuario Pagina 1

Busca en linea o descarga Manual de usuario para Hardware Littelfuse 437 Series. Littelfuse 437 Series User Manual Manual de usuario

Indice de contenidos

Comentarios a estos manuales

Littelfuse 437 Series Manual de usuario Pagina 1

Busca en linea o descarga Manual de usuario para Hardware Littelfuse 437 Series. Littelfuse 437 Series User Manual Manual de usuario

Indice de contenidos

Comentarios a estos manuales

Relacionado con productos y manuales para Hardware Littelfuse 437 Series