Square Ceramic Surface Mount Medium Blow Fuse
Amp range / I.R. ability @ Volt
Safety Agency Approvals
20A - 30A / 100A@ 250V AC resistive
Recognized File No. E20624
150A@125V AC resistive
300A@ 65V DC resistive
Reflow Conditions Recommended: 240° C, 30 sec. max.
Pb-Free Process Compatibility:
When soldered to test boards using IR reflow in accordance with JEDEC
J-STD-020 (260° C, 40 sec. max.), SMM samples exhibited DCR change of
+10% to -20% from initial values.
Subsequent tests showed all samples complied with the stated electrical
characteristics on this data sheet.
NOT Recommended for Wave solder / Direct immersion / Hand Solder
MIL-STD-202G, Method 213B, Test Condition I (100 G's peak for 6 milliseconds).
MIL-STD-202G, Method 201A (10-55 Hz, 0.06 inch, total excursion).
Salt Spray Resistance
MIL-STD-202G, Method 101E, Test condition B (48 hrs).
Thermal Shock Resistance
MIL-STD-202G, Method 107G, Test Condition B (-65° C to +125° C)
MIL-STD-202G, Method 302, Test Condition A
(After Opening) 10,000 ohms minimum
MIL-STD-202G, Method 208H
Soldering Heat Resistance:
MIL-STD-202G, Method 210F
-55° C to +85° C Max.
– TEST CONDITIONS
For all SMM data, as well as UL Component investigation, all tests were conducted with fuse samples soldered on a PCB (1.6mm thick) test
board with copper traces measuring 0.1 mm nominal thickness (3 oz.clad), 10mm wide and 100 mm overall length.
– UL Condition of Acceptability
- the following information is contained in the UL Component Recognition for SMM Fuse Series:
The maximum temperature recorded in open air was 100
operating temperatures in end-use application with regard to thermal index of surrounding materials and components.
(Maximum temperature recorded at 80% of rating (24A) for the SMM30 rating was 69 C (48 C rise).
– MINIMUM FUSING POINT :
The SMM Series fuses are NOT intended to be operated at currents between 100% and 200% of ampere rating. Prolonged operation at currents
in this range may result in overheating of the fuse and/or desoldering of the fuse caps from the PCB pad.
Consult manufacturer for other ratings
Ceramic Body / Matte Tin Plated Brass Caps
"bel", "Current Rating" in black
"bel", "SMM", Current Rating, Voltage Rating, Interrupting Rating,
Safety Logo and "
2,000 fuses in 13 inches dia. reel, 16mm wide tape, 8mm pitch, per EIA Standard
C in a 21
C ambient (79
C rise). Consideration should be given to checking
(Volt) max. (A²Sec) min.
"(China RoHS compliant)