Littelfuse 446 User Manual

446/447 Series Fuse

Surface Mount Fuses

EBF Fuse Fast-Acting > 446/447 Series

Description

The 446/447 series are circuit-board mountable, flat profile,
fast-acting fuses designed for protection of electronic

446 Series

(surface mount leads)

447 Series

(thru-hole leads)

ballasts and power inverter applications. The 446 series is
designed with leads for surface mount applications, and
the 447 series is designed with leads for through-hole
applications.

This series of devices are 100% lead-free and meets the
requirements of the RoHS directive.

Features

Agency Approvals

AGENCY

AGENCY FILE

NUMBER

E71611 2A - 10A

LR29862 2A - 10A

AMPERE RANGE

• RoHScompliantand

100% lead-free

• Idealforuseinelectronic

lighting ballast, power
supply and power
inverter applications.

• Ratedforusein125,

250, 277 and 350 VAC
circuits.

• Basedontheproven

reliability of the
automotive MINI
available from 2 through
10 amperes.

Electrical Characteristics for Series

% of Ampere

Rating

100% 4 hours, Minimum

200% 0.15 sec. Min.; 5 sec. Max.

Opening Time

Electrical Specifications by Item

Ampere

Rating

(A)

2.00 002. 350

3.00 003. 350 0.0340 9.4 x x

4.00 004. 350 0.0240 17 x x

5.00 005. 350 0.0180 25 x x

7.50 07.5 350 0.0110 68 x x

10.0 010. 350 0.0073 93 x x

Amp Code

Max

Voltage

Rating

(V)

Interrupting

Rating

100 amperes @350

VAC, 50 amperes

@125 VDC and 450

amperes @60VDC

Nominal Cold

Resistance

(Ohms)

0.0560 2.8 x x

Nominal Melting

2

t (A2sec)

I

Agency Approvals

®

Fuse;

Additional Information

Datasheet

446 Series

Datasheet

447 Series

Resources

446 Series

Resources

447 Series

Specifications are subject to change without notice.

Samples

446 Series

Samples

447 Series

© 2013 Littelfuse, Inc.

Revised: 12/19/13

Surface Mount Fuses

7.49

1.44

7 1/2A

TIME IN SECONDS

0446 002. ZRP

0447 002. YXP

EBF Fuse Fast-Acting > 446/447 Series

Temperature Rerating Curve

Note:

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

Soldering Parameters

446 Series:

Reflow Solder — 235°C, 5 seconds maximum.
No-clean process recommended.
Wave Solder — Not recommended.
Non-plated terminal surfaces may not meet
MIL-STD-202, Method 208.

447 Series:

Contact Littelfuse for soldering parameters.
Inside terminal face of each lead is non-plated zinc.
Non-plated zinc terminal faces may not meet MIL-STD-202,
method 208. To ensure that the fuse is acceptable for the
application, appropriate application testing should be performed.

Average Time Current Curves

2A3A4A

5A

1000

100

10

1

0.1

0.01

CURRENT IN AMPERES

10A

10001001010.1

Product Characteristics

Materials

Cleaning No-cleaning process recommended

Operating
Temperature

Body: Plastic Body – Terminations: Tin-load
(95/5) plated Zn, Ni barrier

O

C to 125OC

–40

Dimensions

Reference Dimensions

(Inches)

T

PA

LF

350V

For 447 dimensions, please contact Littelfuse for specifications.

10.92

(.430")

(.295")

A

6

3.81

0

4

(.150")

6

02

(.060")

1.50 (.059") MAX

(.032")

0.81

1.52

8.76

(.345")

(.057")

Recommended

Pad Layout

5.91

(.233")

8.81

(.347")

3.2

(.126")

5.59

(.220")

4.03

(.159")

3.2 (.126")

0.81

(.032")

447 Mounting

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

Holes

1.27

(.050") Dia

10.11
(.398")

Part Numbering System

Surface Mount Fuses: Through Hole Fuses:

Series
Amp Code
Quantity Code

ZRP = 800

Series
Amp Code
Quantity Code

YXP = 4000

Packaging

Packaging

Option

446 Series

24mm Tape

and Reel

447 Series

Bulk Pack – 4000 YXP

Packaging

Specification

EIA RS-481-1

(IEC 286, part 3)

Quantity

Quantity &

Packaging Code

800 ZRP