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© 2009 Littelfuse, Inc.

Specifications are subject to change without notice.

Surface Mount Fuses

Please refer to www.littelfuse.com/series/437.html for current information.

437 Series

Ceramic Fuse > 437 Series

Materials

Body: Advanced Ceramic

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

Element Cover Coating: Lead-free Glass

Moisture

Sensitivity Level

IPC/JEDECJ-STD-020C,Level1

Solderability

IPC/EIC/JEDECJ-STD-002B,ConditionB

Humidity Test

MIL-STD-202,Method103B,ConditionsD

Resistance to

Solder Heat

MIL-STD-202,Method210F,ConditionB

Product Characteristics

Moisture Resistance

MIL-STD-202, Method 106G

Thermal Shock

MIL-STD-202, Method 107G,

ConditionB

Mechanical Shock

MIL-STD-202,Method213B,

Condition A

Vibration

MIL-STD-202, Method 201A

Vibration,

High Frequency

MIL-STD-202, Method 204D,

Condition D

Dissolution of

Metallization

IPC/EIC/JEDECJ-STD-002B,

Condition D

Terminal Strength

IEC60127-4

Dimensions

0.520 ± 0.200

[0.020 ± 0.08]

2

3.200 ± 0.1778

[0.126 ± 0.007]

1.000

[0.039]

1.63 +0.10 / -0.2

[0.064 +0.004 / -0.008]

N

1.500

[0.059]

1.800

[0.071]

3.500

[0.138]

1.000

[0.039]

0.8179 +0.046 / -0.076

[0.0332 +0.0018 / -0.003]

Packaging

Part Marking System

packaging Option

packaging Specification

Quantity

Quantity &

packaging code

8mm Tape and Reel

EIA-481,IEC60286,Part3

3000

WR

Part Numbering System

0437 008. W R

SERIES

AMP CoDE

quANTITy CoDE

PACkINg CoDE

W = 3000 pcs

R=ReelPack

Amp code

marking code

.250

D

.375

E

.500

F

.750

g

001.

H

1.25

J

01.5

k

1.75

L

002.

N

02.5

o

003.

P

03.5

R

004.

S

005.

T

007.

W

008.

X