Littelfuse 451 Series - Manual (Page 4)

© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/20/14
Surface Mount Fuses
NANO 2® > Very Fast-Acting > 451/453 Series
Materials
Body: Ceramic
Terminations:
Gold-Plated Caps / Sn-dipped Silver Plated
Caps (451 RoHS/HF series)
SnPb Plated Caps (for 451 Non-RoHS series,
375mA-15A)
Silver-plated Caps (451MR RoHS ratings
below 375mA and 453 RoHS Series)
Product Marking Brand, Ampere Rating
Operating
Temperature
–55°C to 125°C
Moisture Sensitivity
Level
Level 1, J-STD-020C
Solderability MIL-STD-202, Method 208
Insulation
Resistance
(after Opening)
MIL-STD-202, Method 302, Test Condition
A (10,000 ohms minimum)
Thermal Shock
MIL-STD-202, Method 107, Test
Condition B, 5 cycles, -65°C /
+125°C, 15 minutes @ each extreme
Mechanical Shock
MIL-STD-202, Method 213, Test I:
Deenergized. 100G’s pk amplitude,
sawtooth wave 6ms duration, 3
cycles XYZ+xyz = 18 shocks
Vibration
MIL-STD-202, Method 201: 0.03”
amplitude, 10-55 Hz in 1 min. 2hrs
each XYZ=6hrs
Moisture Resistance MIL-STD-202, Method 106, 10 cycles
Salt Spray
MIL-STD-202, Method 101, Test
Condition B (48hrs)
Resistance to Soldering
Heat MIL-STD-202, Method 210, Test
condition B (10 sec at 260°C)
Product Characteristics
Dimensions
Packaging
Part Numbering System
F
7 A
6.86
(.270")
3.15
(.124")
2.95
(.116")
1.96
(.077")
2.69 ± .25
(.106")
2.69 ± .25
(.106")
1.45
(.057")
6.10 ± .20
(.240")
recommended pad layout
packaging Option packaging Specification Quantity
Quantity &
packaging code
12mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 5000 NR
12mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 1000 MR
0451 001. M R L
SERIES
AMP Code
QuANTITy Code
PACkAgINg Code
Refer to Electrical
characteristics table
M = 1000 pcs
N = 5000 pcs
R = Tape and Reel
L-RoHS Compliant & Halogen Free
(gold Plated Caps)
451 = Gold / SnPb / Silver Plated Caps
453 = Silver Plated Caps
NOTE: “L” suffix applies to 451 series only
- 451 series may be ordered as either “RoHS and HF” (“L” suffix) or non-RoHS (no suffix) version.
- 453 series is available only as RoHS compliant version and does not require “L” suffix. Please do not
include “L” suffix within 453 series ordering instructions.
SN-RoHS Compliant & Halogen Free
(Sn-dipped Caps)