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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Radial Lead Fuses
TR3 > Fast-Acting Fuse > 303 Series
Product Characteristics
Operating Temperature -25ºC to +70ºC (consider de-rating)
Climatic Category
-25ºC/+70ºC/21 days
(IEC 60068-1-3)
Stock Conditions
+10ºC to +60ºC RH,
≤75% yearly average, without dew
Vibration Resistance
24 cycles at 15 min. each
(IEC 60068-6)
10 - 60 Hz at 0.75 mm amplitude
60 - 2000 Hz at 10 g acceleration
Ø 6
Ø 0,6
2,54
max. 8
L
1 +0,1
Materials
Base/Cap: Black Thermoplastic Base
Polyamide PA 6.6, UL 94V-0
Brass, Nickel-plated Cap
Round Pins: Copper alloy, Tin–plated
Lead Pull Strength 10 N (IEC 60068-2-21)
Solderability
260ºC, ≤ 3s. (Wave)
350ºC, ≤ 1s. (Soldering Iron)
Soldering Heat
Resistance
260ºC, 10s. (IEC 60068-2-20)
350ºC, 3s. (Soldering Iron)
Dimensions
Part Numbering System
Dimensions (mm)
Holes in PCB
Long Leads (L=18.8 mm)
Short Leads (L=4.3 mm)
Packaging
Packaging Option Packaging Specification Quantity
Quantity &
Packaging Code
Reel Size
303 Series
Tape & Ammopack N/A 1,500 0001 N/A
Long Leads N/A 200 0131 N/A
Short Leads N/A 300 0421 N/A
0001 Tape/Ammopack (1,500 pcs.)
0131 Long Leads - Bulk (200 pcs.)
0421 Short Leads - Bulk (300 pcs.)
303 xxxx 0001
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test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
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