Littelfuse 438 Series Manuale Utente Scaricare il pdf

Speciﬁcations are subject to change without notice.

Revised: 12/19/13

Surface Mount Fuses

Ceramic Fuse > 438 Series

438 Series – 0603 Fast-Acting Fuse

Description

The 438 Series is a 100% Lead-free, RoHS compliant and

Halogen-free fuse series designed speciﬁcally to provide

over-current protection to circuits that operate under high

working ambient temperature up to 150ºC.

The general design ensures excellent temperature stability

and performance reliability.

The high I²t values which is typical in the Littelfuse Ceramic

Fuse family ensure high inrush current withstand capability.

Agency Approvals

AGENCY AGENCY FILE NUMBER AMPERE RANGE

E10480 0.250A – 6A

LR29862 0.250A – 6A

Features

Electrical Characteristics for Series

• OperatingTemperature

from -55ºC to +150ºC

• 100%Lead-free,RoHS

compliant and Halogen-

free

• Suitableforbothleaded

and lead-free reﬂow /

wave soldering

% of Ampere

Rating

Ampere Rating Opening Time at 25ºC

100% 0.250A – 6A 4 Hours, Minimum

250% 0.250A – 6A 5 Seconds, 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

0.25 .250 63VDC

50A @ 63VDC

50A @ 32VAC

2.024 0.0017 0.550 0.138 x x

0.375 .375 63VDC 1.247 0.0041 0.488 0.183 x x

0.5 .500 63VDC 0.829 0.0100 0.486 0.243 x x

0.75 .750 63VDC 0.466 0.0281 0.378 0.284 x x

1 0 01. 63VDC 0.310 0.0593 0.351 0.351 x x

1.25 1.25 63VDC 0.200 0.0510 0.365 0.456 x x

1. 5 01. 5 63VDC 0.174 0.0902 0.368 0.552 x x

1.75 1.75 63VDC 0.125 0.1440 0.360 0.540 x x

2 002. 32

50A @ 32VDC/12VAC

0.051 0.1490 0.107 0.214 x x

2.5 02.5 32 0.0324 0.1977 0.095 0.238 x x

3 003. 32 0.0252 0.2922 0.093 0.279 x x

3.5 03.5 32 0.0203 0.4752 0.082 0.287 x x

4 004. 32 0.0169 0.6920 0.079 0.316 x x

5 005. 32 0.0113 0.7398 0.074 0.370 x x

6 006. 24 50A @ 24VDC/12VAC 0.0087 1.3838 0.072 0.432 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 msec. opening time.

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

• HandheldElectronics

• LCDDisplays

• BatteryPacks

• HardDiskDrives

• SDMemoryCards

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

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