BEL SMM_12

3812 Size
RoHS 6 Compliant
Type SMM
Square Ceramic Surface Mount Medium Blow Fuse
SMM Feb 2012D
Pb
SMM Series Fuse
Features
- Medium Blow
- Suface mount high current fuse
- Current rating from 20A to 30A
- Wide operating temperature range from -55oC to 125oC
- Tape and Reel for auto-insert SMD process
- Compatible with reflow process
- Halogen Free
- Leadfree Pb
Applications
Electrical Characteristics (UL / CSA /STD.248-14)
- Voltage regulator module
- PC server
- Office electronic equipment
- Industrial equipment
- Medical equipment
- POE, POE+
- Power supply
- DC-DC Converter
HALOGEN FREE =
LEAD FREE =
HF
Pb
Safety Agent Approvals
SAFETY
AGENCY
SAFETY
AGENCY
CERTIFICATE
E20624
AMPERE RANGE / VOLT
@ I.R.ABILITY
20A - 30A / 250V @100A AC
125V @ 150A AC
72V @ 130A DC
65V @ 300A DC
20A - 30A
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ‧Tel: 201-432-0463 ‧Fax: 201-432-9542 ‧E-Mail: belfuse.com
Website: www.belfuse.com
3812 Size
RoHS 6 Compliant
Type SMM
Pb
Square Ceramic Surface Mount Medium Blow Fuse
SMM Feb 2012C
Electrical Specifications
Nominal
Nominal
Cold
Volt-drop
Resistance @100% In
(ohm)
(volt)
Catalog
Number
Ampere
Rating
(A)
SMM 20
20A
0.0025
0.09
SMM 25
25A
0.0019
0.08
SMM 30
30A
0.0013
0.07
Interrupting Rating
20A - 30A / 250V @100A AC
125V @ 150A AC
72V @ 130A DC
65V @ 300A DC
Agency Approvals
Max.
Voltage
Rating
(V)
Melting I2T
@ 10 In
(A2 Sec)
Min.
Nominal
Power
Dissipation
(W)
250
270
1.8
Y
Y
250
420
2.0
Y
Y
250
1000
2.1
Y
Y
Soldering Guidelines
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
NOTES:
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 oC in a 21 oC ambient (79 oC rise). Consideration should be given to checking 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 69oC (48 oC rise).
Caution:
-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.
Average Time Current Curve
Temperature Derating Curve
140
130
SMM - TIME CURRENT CHARACTERISTIC CURVE
Percent of Rated Current
120
20A
25A
30A
110
100
100000
90
80
70
10000
60
50
-75-65-55-45-35-25-15 -5
5 15 25 35 45 55 65 75 85 95105115125135145
1000
TIME IN SECONDS
Ambient Temperature [oC]
100
10
1
0.1
0.01
10
100
1000
CURRENT IN AMPERES
CORPORATE OFFICE
Bel Fuse Inc.
FAR EAST OFFICE
Bel Fuse Ltd.
EUROPE OFFICE
Bel Fuse Europe Ltd.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542 E-Mail: belfuse@belfuse.com
Website: www. belfuse.com
8/F Luk Hop Industrial Building Preston Technology Management Centre
8 Luk Hop Street
Marsh Lane, Suite F15
San Po Kong
Preston, Lancashire, PR1 8UQ
Kowloon, Hong Kong
United Kingdom
Tel 852-2328-5515
Tel 44-1772-556601
Fax 852-2352-3706 Fax 44-1772-888366 EUROPE
Bel Stewart GmbH
Industriestrasse 20
61381 Friedrichsdorf
Germany
Tel 49-6172-9552-0
Fax 49-6172-9552-40 Type SMM
Pb
3812Size
RoHS 6 Compliant
Square Ceramic Surface Mount Medium Blow
SMM Feb 2012D
Soldering Parameters
240oC max.
20-30 seconds.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ‧Tel: 201-432-0463 ‧Fax: 201-432-9542 ‧E-Mail: belfuse.com
Website: www.belfuse.com
3812 Size
RoHS 6 Compliant
Type SMM
SSQDNOV201
Square Ceramic Surface Mount Medium Blow Fuse
Pb
Pb
SMM Feb 2012C
Physical Specifications
Environmental Specifications
Ordering Information
Mechanical Dimensions
2.0±0.2mm
(0.08''±0.008''
3.1±0.1mm
(0.12''±0.004''
)
3.1±0.1mm
(0.12''±0.004''
)
9.8±0.2mm
(0.39''±0.008'')
3.8mm
(0.15")
4.1mm
(0.16")
5.6m
m(0.2
2")
Packaging
CORPORATE OFFICE
Bel Fuse Inc.
FAR EAST OFFICE
Bel Fuse Ltd.
EUROPE OFFICE
Bel Fuse Europe Ltd.
EUROPE
Bel Stewart GmbH
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542 E-Mail: belfuse@belfuse.com
Website: www. belfuse.com
8/F Luk Hop Industrial Building
8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706 Preston Technology Management Centre
Marsh Lane, Suite F15
Preston, Lancashire, PR1 8UQ
United Kingdom
Tel 44-1772-556601
Fax 44-1772-888366 Industriestrasse 20
61381 Friedrichsdorf
Germany
Tel 49-6172-9552-0
Fax 49-6172-9552-40