0438001.--Datasheet/数据表在线中文翻译

Surface Mount Fuses Datasheet

438 Series

0603 Fast-Acting Fuse

RoHS Pb

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.

Features & Benefits

■ OperatingTemperature from

■ Conforms to EN 60127-1 and

-55ºC to +150ºC

EN 60127-7

■ 100% Lead-free, RoHS

compliant and Halogen-free

■ CE Mark indicates suitability

for the European Market

■ Suitable for both leaded

and lead-free reﬂow / wave

soldering

■ UKCA Mark indicates suitability

for the UK Market

Additional Information

■ Recognized to UL/CSA/NMX

248-1 and UL/CSA/NMX 248-

Applications

■ Handheld Electronics

■ LCD Displays

Resources

Accessories

Samples

■ Hard Disk Drives

■ SD Memory Cards

Agency Approvals

■ Battery Packs

Agency

Agency File Number

Ampere Range

E10480

29862

J50489122

N/A

0.250A – 6A

0.250A - 6A

Electrical Characteristics for Series

% of Ampere Rating

Ampere Rating

OpeningTime at 25ºC

100%

250%

0.25A – 6A

4 Hours, Minimum

N/A

5 Seconds, Maximum

Electrical Speciﬁcations by Item

Ampere

Rating

(A)

Nominal

Nominal NominalVoltage Nominal Power

Agency Approvals

Amp Max.Voltage

Code Rating (V)

Interrupting Rating

Resistance Melting I²t Drop At Rated

Dissipation At

(Ohms)²

2.218

1.247

0.829

0.466

0.310

0.200

0.174

0.1405

0.051

0.0324

0.0255

0.0205

0.0170

0.0115

(A²Sec.)³

0.0017

0.0041

0.0100

0.0281

0.0593

0.0510

0.0902

0.1440

0.1490

0.1977

0.2922

0.4752

0.6920

0.7398

1.3838

Current (V)⁴

0.550

0.488

0.486

0.378

0.351

0.365

0.368

0.360

0.107

0.095

0.093

0.082

0.079

0.074

Rated Current (W)

0.250 .250

0.375 .375

0.500 .500

0.750 .750

1.00

1.25

1.50

1.75

2.00 002.

2.50 02.5

3.00 003.

3.50 03.5

4.00 004.

5.00 005.

6.00 006.

63VDC

0.138

0.183

0.243

0.284

50A @ 63VDC

50A @ 32VAC

001.

1.25

01.5

1.75

0.351

0.456

0.552

0.540

0.214

0.238

0.279

0.287

0.316

0.370

50A @ 32VDC/12VAC

50A @ 24VDC/12VAC 0.0085

0.072

0.432

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 Re-rating Curve”for additional re-rating

information.

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.

Devices designed to be mounted with marking code facing up.

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

Speciﬁcations are subject to change without notice.

Revised: GD. 08/11/23

Surface Mount Fuses Datasheet

438 Series

0603 Fast-Acting Fuse

Temperature Re-rating Curve

AverageTime Current Curves

140

120

100

-65 -45

-25

-5

115 135 155

TEMPERATURE (°C)

0.1

Note:

1. Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation.

Example:

For continuous operation at 75 degrees celsius, the fuse should be rerated as follows:

I = (0.80)(0.85)I_RAT= (0.68)I_RAT

0.01

0.001

0.1

100

CURRENT IN AMPERES

Soldering Parameters

Pb – free

assembly

Reﬂow Condition

t_P

-Temperature Min (T_s(min)

-Temperature Max (T_s(max)

-Time (Min to Max) (t_s)

)

150°C

T_P

Critical Zone

Ramp-up

T_Lto T_P

Pre Heat

)

200°C

60 – 180 seconds

3°C/second max.

5°C/second max.

217°C

T_L

T_S(max)

t_L

Average Ramp-up Rate (LiquidusTemp (T_L) to peak)

T_S(max)toT_L- Ramp-up Rate

Ramp-down

Preheat

-Temperature (T_L) (Liquidus)

Reﬂow

T_S(min)

-Temperature (t_L)

60 – 150 seconds

260^+0/-5°C

t_S

PeakTemperature (T_P)

Time within 5°C of actual peakTemperature (t_p)

Ramp-down Rate

10 – 30 seconds

6°C/second max.

8 minutes max.

260°C

time to peak temperature

(t 25ºC to peak)

Time

Time 25°C to peakTemperature (T_P)

Do not exceed

Wave Soldering

260°C, 10 seconds max.

Speciﬁcations are subject to change without notice.

Revised: GD. 08/11/23

Surface Mount Fuses Datasheet

438 Series

0603 Fast-Acting Fuse

Product Characteristics

Body: Advanced Ceramic

Moisture Resistance

MIL-STD-202, Method 106

Materials

Terminations: Ag / Ni / Sn (100% Lead-free)

Element Cover Coating: Lead-free Glass

Thermal Shock

Mechanical Shock

Vibration

MIL-STD-202, Method 107, Condition B-3

MIL-STD-202, Method 213, Condition A

MIL-STD-202, Method 201

Moisture Sensitivity

Level

IPC/JEDEC J-STD-020, Level 1

Solderability

IPC/EIC/JEDEC J-STD-002, Condition B

MIL-STD-202, Method 103, Conditions D

MIL-STD-202, Method 210, Condition B

Vibration, High

Frequency

Dissolution of

Metallization

MIL-STD-202, Method 204, Condition D

Humidity

Resistance to Solder

Heat

IPC/EIC/JEDEC J-STD-002, Condition D

IEC 60127-4

Terminal Strength

Dimensions mm [in]

Part Marking System

0.530 +/- 0.150

[0.021 +/- 0.006]

Amp Code

Marking Code

Amp Code

Marking Code

1.582 +/- 0.152

[0.062 +/- 0.006]

.250

.375

.500

.750

001.

1.25

01.5

1.75

002.

02.5

003.

03.5

004.

005.

006.

0.828 +/- 0.152

[0.033 +/- 0.006]

0.516 +/- 0.064

[0.020 +/- 0.003]

Part Numbering System

0438 005. W

SERIES

0.432 +/- 0.150

[0.017 +/- 0.006]

PACKING CODE

R = Reel Pack

AMP CODE

0.60

[0.024]

0.74

[0.029]

QUANTITY CODE

W = 3000 pcs

1.00

[0.039]

Packaging

Option

8mmTape

Packaging

Quantity &

Packaging Code

Quantity

1.94

[0.076]

Speciﬁcation

EIA-481, IEC

60286-3

3000

and Reel

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devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth

in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable

for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and

Conditions of Sale, unless otherwise agreed by Littelfuse. Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own

applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.

Speciﬁcations are subject to change without notice.

Revised: GD. 08/11/23