433 Series - OBSOLETE - SlimLine 1206 Very Fast-Acting Thin-Film Fuse

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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, 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. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The 433 series fast-acting surface mount fuse series
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.
For RoHS compliant and lead-free design, please refer to
the Littelfuse 466 series thin film fuse. For new designs of
7 amp please refer to Littelfuse 429 series thin film fuse.


  • The SlimLine 1206 fuse is an extremely small, low profile design (1206 chip size) utilizing thin-film technology to achieve precise control of electrical characteristics.
  • The lower height profile produces a flat surface for improved performance in pick-and-place operations and an alternate solution for height critical application.
  • Mounting pad and electrical specification are identical to the popular 429 Series specifications.

Access specifications, certifications, check availability and order parts below

Catalog #VDC (V)VAC (V)Nominal Melting I2T (A2sec)Resistance
BodyOpeningOperating TemperaturePartner ECAD ModelsCompare
Replaced By: 0466.125 04661.25 0466005.
1251250.0004Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433.125
Replaced By: 0466.200
1251250.0006Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433.200
Replaced By: 0466.250
1251250.001Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433.250
Replaced By: 0466.375
1251250.0028Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433.375
Replaced By: 0466.500
63630.006Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433.500
0433.60063630.0131Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433.600
Replaced By: 0466.750
63630.017Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433.750
Replaced By: 0466001.
63630.0305Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433.800
Replaced By: 0466001.
63630.035Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433001.
Replaced By: 04661.25 0466002.
63630.23Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433002.
Replaced By: 046601.5 0466003.
32320.7Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433003.
Replaced By: 04661.75 0466004.
24241.024Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433004.
Replaced By: 0466002. 0466005.
24241.6Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433005.
0433007.24243.9690.0076Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C0433007.
Replaced By: 046601.5 0466003.
63630.125Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C043301.5
Replaced By: 046602.5 0466004.
32320.5Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C043302.5
Replaced By: 0466.125 04661.25 0466005.
63630.065Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C04331.25
Replaced By: 04661.75
63630.15Epoxy SubstrateVery Fast-Acting (FF)-55° to 90°C04331.75
To request product environmental information, please complete the Product Environmental Information Request Form.

pdficon Fuse 433 Datasheet

The 433 series fast-acting surface mount fuse series is a small (1206 size) thin-film device designed for secondary protection of circuits...

pdficon Non RoHS Thin Film Fuse Obsoletion

PCN# EFU100-3

tc-icon 433 Series Time Curve Data

pdficon How to Specify a CablePro Fuse to Improve Design

pdficon Circuit Protection Technology Application Matrix Application Guide

Littelfuse is the world leader in the design and manufacturing of fuses for the automotive industrial handheld computer and telecom markets...