Datasheet > 440.75

440.75

更新时间： 2023-12-06 20:12:46

品牌	Logo	应用领域
力特 - LITTELFUSE		过电流保护
页数	文件大小	规格书
3页	386K
描述
440系列为100%无铅、符合RoHS标准且无卤素的保险丝产品，专用于工作环境温度极高（最高可达150°C）和励磁涌流很高的电路过电流保护。通用型设计既可确保产品具有卓越的高温稳定性，又能提供

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440.75 数据手册

Fuse Datasheet

440 Series

1206 High I²t Fuse

RoHS Pb

Description

The 440 Series is a 100% RoHS Compliant, lead-free and halogen-

free fuse series designed specifically to provide over-current

protection to circuits that operate under high working ambient

temperatures up to 150ºC and high inrush currents. The general

design ensures excellent temperature stability and performance

reliability. This high I2t fuse series is designed to have ultra high

inrush current withstand capability to avoid nuisance fuse open.

Features and Benefits

■ OperatingTemperature from

■ Ultra high I2t values

-55ºC to +150ºC

■ Recognized to UL/CSA/NMX

■ RoHS compliant, lead-free and

248-1 and UL/CSA/NMX 248-14

halogen-free

■ Suitable for both leaded

and lead-free reﬂow / wave

soldering

Additional Information

Applications

■ LCD Displays

■ Servers

■ Scanners

■ Data Modems

■ Hard Disk Drives

■ Notebook Computers

■ Printers

Resources

Accessories

Samples

Electrical Characteristics for Series

Agency Approvals

% of Ampere Rating Ampere Rating

OpeningTime at 25ºC

Agency

Agency File Number

Ampere Range

100%

350%

0.25A - 8A

4 hours, Minimum

5 secs., Maximum

E10480

29862

0.25A - 8A

Electrical Speciﬁcations by Item

Ampere

Rating

(A)

Nominal

Resistance

(Ohms)¹

Nominal

Melting I²t

(A²Sec.)²

NominalVoltage

Drop At Rated

Current (V)³

Nominal Power

Dissipation At Rated

Current (W)

Agency Approvals

Amp Max.Voltage Interrupting Rating

Code

Rating (V)

(AC/DC)

0.250

0.375

0.500

0.750

1.00

1.25

1.50

1.75

2.00

2.50

3.00

3.50

4.00

5.00

7. 0 0

.250

.375

.500

.750

001.

1.25

01.5

1.75

002.

02.5

003.

03.5

004.

005.

0 0 7.

008.

125

2.140

1.216

0.00649

0.01455

0.02642

0.09312

0.21054

0.379

0.50652

0.4000

0.4700

0.8200

1.2470

2.3800

3.136

0.5260

0.4993

0.4831

0.3983

0.3457

0.3240

0.3215

0.0777

0.0792

0.0747

0.0742

0.0757

0.0709

0.0654

0.0696

0.0655

0.132

0.187

0.242

0.299

0.346

0.405

0.482

0.136

0.158

0.187

0.223

0.265

0.284

0.327

0.487

0.524

50 A @ 125 V AC/DC

50 A @ 63 V AC/DC

0.8140

0.4624

0.3096

0.2265

0.1759

0.0450

0.0385

0.02850

0.02252

0.01845

0.01553

0.0120

0.00753

0.00634

50 A @ 50 VAC/DC

50 A @ 32 V AC/DC

5.949

10.38

13.03

8.00

Notes:

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 Derating Curve”for additional derating

information.

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

2. Contact Littelfuse if application transient surges are less than 1 ms.

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

Devices designed to be mounted with marking code facing up.

Speciﬁcations are subject to change without notice.

Revised: GD. 02/21/23

12 3

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