Littelfuse 466 User Manual

466 Series Fuse

Surface Mount Fuses

Thin Film > 1206 Size > Very Fast-Acting > 466 Series

Description

The 466 Series Fast-Acting Surface Mount Fuse (SMF)
is a small (1206 size) thin-film device designed for
secondary protection of circuits used in space constrained
applications such as hand-held portable electronic devices.

This series is 100% lead-free and meets the requirements
of the RoHS directive. New Halogen-Free 466 Series
fuses are available to order using the “HF” suffix. See Part
Numbering section for additional information.

Features

Agency Approvals

AGENCY AGENCY FILE NUMBER AMPERE RANGE

E10480 125mA - 5A

LR29862 125mA - 5A

Electrical Characteristics for Series

% of Ampere

Rating

100% 4 hours, Minimum

200% 5 sec., Maximum

300% 0.2 sec., Maximum

Opening Time at 25

O

C

Additional Information

Datasheet

Resources

Samples

Electrical Specifications by Item

• Productiscompatible

with lead-free solders
and higher temperature
profiles

• Productismarkedon

top surface with code to
allow amperage rating
identification without
testing

• Lowproleforheight

sensitive applications

• Flattopsurfaceforpick-

and-place operations

• Element-coveringmaterial

is resistant to industry
standard cleaning
operations

• Mountingpadand

electrical performance are
identical to Littelfuse 429
and 433 Series products

• Alloy-basedelement

construction provides
superior inrush withstand
characteristics (I

2

t) over
ceramic or glass-based
1206 chip fuse products

Applications

Secondary protection for space constrained applications:

• Cellphones

• Batterypacks

• DVDplayers

• Harddiskdrives

• Digitalcameras

Ampere

Rating

(A)

0.125 .125 125

0.200 .200 125 1.160 0.00055 254.28 0.0509 x x

0.250 .250 125 0.710 0. 0 010 207.01 0.0518 x x

0.375 .375 125 0.350 0.0028 169.18 0.0634 x x

0.500 .500 63

0.750 .750 63 0.111 0.0276 98.65 0.0740 x x

1. 0 0 0 01. 63 0.076 0.0423 89.94 0.0899 x x

1.25 1.25 63 0.059 0.0640 85.71 0.1071 x x

1.50 01. 5 63 0.048 0.1103 82.97 0.1244 x x

1.75 1.75 63 0.039 0.1323 80.73 0.1413 x x

2.00 002. 63 0.031 0.2326 78.73 0.1575 x x

2.50 02.5 32

3.00 003. 32 0.020 0.5760 75.99 0.2280 x x

4.00 004. 32 0.014 1.024 74.50 0.2980 x x

5.00 005. 32 0.011 1.600 73.75 0.3688 x x

1. Measured at 10% of rated current, 25ºC.

2. Measured at rated voltage.

Amp

Code

Max

Voltage Rating

(V)

Interrupting

Rating

50A @125 V AC/

DC

50A @63 V AC/DC

50A @32 V AC/DC

Nominal Cold

Resistance

(Ohms)

4.000 0.00040 552.66 0.0691 x x

0.248 0.0060 158.47 0.0792 x x

0.024 0.3516 76.99 0.1925 x x

Nominal

Melting

2

t (A2sec)

I

Nom

Voltage Drop

(mV)

Nom Power

Dissipation

(W)

Specifications are subject to change without notice.

Agency Approvals

© 2013 Littelfuse, Inc.

Revised: 12/19/13

Surface Mount Fuses

TIME IN SECONDS

CURRENT IN AMPERES

100

A

Thin Film > 1206 Size > Very Fast-Acting > 466 Series

Temperature Rerating Curve

Note:

1. Rerating depicted in this curve is in addition to the standard rerating of 25% for
continuous operation.

Example:
For continuous operation at 70 degrees celsius, the fuse should be rerated as follows:

I = (0.75)(0.80)I

2. The temperature derating curve represents the nominal conditions. For questions
about temperature derating curve, please consult Littelfuse technical support for
assistance.

= (0.60)I

RAT

RAT

Average Time Current Curves

1/2A

100

0.01

0.001

3/8A

1/4A

1/8A

10

1

0.1

0.1

3/4A

1

1A

5A

4A

3A

2 1/2A2A

1 3/4A1 1/2A1 1/4

10

Soldering Parameters

Reflow Condition Pb – free assembly

- Temperature Min (T

Pre Heat

- Temperature Max (T

- Time (Min to Max) (ts) 60 – 180 seconds

Average Ramp-up Rate (Liquidus Temp
(T

) to peak)

L

to TL - Ramp-up Rate 5°C/second max.

T

S(max)

Reflow

- Temperature (TL) (Liquidus) 217°C

- Temperature (tL) 60 – 150 seconds

Peak Temperature (TP) 260

Time within 5°C of actual peak
Temperature (t

)

p

Ramp-down Rate 5°C/second max.

Time 25°C to peak Temperature (T
Do not exceed 260°C

Wave Soldering 260°C, 10 seconds max.

) 150°C

s(min)

) 200°C

s(max)

5°C/second max.

+0/-5

°C

20 – 40 seconds

) 8 minutes max.

P

Temperature

T

T

T

T

S(max)

S(min)

25

P

L

time to peak temperature

(t 25ºC to peak)

Preheat

t

S

Ramp-up

t

P

Critical Zone

T

to T

L

P

t

L

Ramp-down

Time

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13