0678-9200-M2

Not recommended for new applications. Please see 0678L 

## Square Ceramic Surface Mount Medium Blow Fuse 

## [HF1@) SMM Series - 3912 Size RoHS 6 Compliant 

## Features 

- Medium Blow 

- Surface mount high current fuse 

- Current rating from 10A to 30A 

- Wide operating temperature range from -55 °C to 125 °C 

- Tape & Reel for auto-insert SMD process 

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## Electrical Characteristics (uL/csa/stD. 248-14) 

## Safety Agency Approvals 

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Testing Current<br>200% Jaa | 60Sec<br>**----- End of picture text -----**<br>


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SAFETY | aGencySAFETY | VOLTAGE RATING AMPERE RANGE / VOLT<br>TOA - 30A/ 250V @ 100A AC<br>E20624 72 VDC 72V @ 130A DC<br>65V @ 300A DC<br>**----- End of picture text -----**<br>


## Physical Specifications 

Terminations : Matte Tin plated Brass Caps "bel", "Current Rating" in black color. 

- "bel", "SMM", "Current Rating", "Voltage Rating", "Interrupting Rating", " Appropriate Safety Logos" and " ie e © "(China RoHS compliant). 

Specifications subject to change without notice 

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Bel Fuse Inc. +1 201.432.0463 206 Van Vorst Street techhelp@belf.com Jersey City, NJ 07302 USA belfuse.com 

© 2016 Bel Fuse, Inc. SMM Jun2016 1 / 4 

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Square Ceramic Surface Mount Medium Blow Fuse<br>[HFI@) SMM Series - 3912 Size RoHS 6 Compliant<br>Environmental Specifications<br>Shock . MIL-STD-202G, Method 213B, Test Condition 1<br> Resistance (100 G's peak for 6 milliseconds; Sawtooth waveform)<br>MIL-STD-202G, Method 201A(10-55 Hz,0.06 inch, total excursion).<br>Salt Spray Resistance | MIL-STD-202G, Method 101E, Test Condition B(48 hrs).<br>: : MIL-STD-202G, Method 302, Test Condition A<br>(After Opening) 10,000 ohms minimum.<br>Solderability MIL-STD-202G, Method 208H<br>Une MIL-STD-202G, Method 107G, Test Condition B<br>(-65 °C to +125 °C).<br>Operating Temperature | -55 °C to +125 °C<br>Moisture Sensitivity Level | 1 ( Peak Temperature at 240 °C for 30 seconds max )<br>Electrical Specifications<br>Catalog Nominal Nominal Melting 27 | Nominal | Agency Approvals<br>ruiaresces AmpereRating ResistanceCold Volt-drop@100% In Voltage and Interrupting.  Ratings. (A2@10InSec) DissipationPower<br>(ohm) (Volt) max. Min. (W)<br>SMM 10 ee<br>|smm15 | 154 | 0.0036 =| 12 | See Table of Safety Approvals Gen] Se en ee ee<br>**----- End of picture text -----**<br>


Consult manufacturer for other ratings 

## Soldering Guidelines 

## Reflow Conditions Recommended 240 °C, 30 sec. max. 

When soldered to test boards using IR reflow in accordance with above 240 °C, SMM samples exhibited DCR change of + 10% to -20% from initial values , the fuse may emit solder. 

Subsequent tests showed all samples complied with the stated electrical characteristics on this data sheet. 

## NOTES: 

## Test Conditions 

For all SMM data, as well as UL Component investigation , all tests were conducted wih fuse samples soldered on a PCB (1.6mm thick) test board with copper traces measuring 0.1mm nominal thickness (3 oz. clad), 10mm wide and 100mm 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 °C in a 21 °C ambient (79 °C 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 SMM 30 rating was 69 °C(48 °C 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. 

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© 2016 Bel Fuse, Inc. SMM Jun20162 / 4 

Square Ceramic Surface Mount Medium Blow Fuse 

[HFI@) SMM Series - 3912 Size 

## RoHS 6 Compliant 

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IR Reflow Profile<br>Temperature Preheatmin al & Soakmin al & Soak al & Soak & Soak Soak }20&20&&<br>Time (Tsmin to Tsmax) (ts) (Tsmin to Tsmax) (ts) to Tsmax) (ts) (ts) 60 -120 seconds -120 seconds seconds<br>Average ramp-up ate Tw 10TH) Tw 10TH) 10TH)<br>Liquidous<br>Time  temperature (TL) (TL) 217 °C °C<br>at liquidous (tL) 60 - 150 seconds seconds<br>Peak temperature temperature (Tp) 240 °C max °C max max<br>Time (tp) within 5 °C °C of the specified the specified specified<br>classification temperture temperture (Tc) 30 seconds seconds<br>Average ramp-down rate (Tp to Tsmax) ramp-down rate (Tp to Tsmax) rate (Tp to Tsmax) (Tp to Tsmax) to Tsmax) Tsmax)<br>Soldering Guidelines<br>Reflow Conditions Recommended 240 °C, 30 sec. Conditions Recommended 240 °C, 30 sec. Recommended 240 °C, 30 sec. 240 °C, 30 sec. °C, 30 sec. 30 sec. sec. max.<br>NOT Recommended for Wave solder / Direct immersion / Hand Solder<br>**----- End of picture text -----**<br>


Specifications subject to change without notice 

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+1 201.432.0463 Bel Fuse Inc. 432. 206 Van Vorst Street techhelp@belf.com Jersey City, NJ 07302 USA belfuse.com © 2016 Bel Fuse, Inc. SMM Jun2016 3 / 4 

Square Ceramic Surface Mount Medium Blow Fuse 

[HFI@ SMM Series - 3912 Size 

## RoHS 6 Compliant 

Fuse FGNO Explanation 0678 - [XXXX] - XX 

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[XXXX]=Ampere Rating; XX=See Ordering Information as below<br>pt ltBel FENODOOON<br>es1<br>Mechanical Dimensions Ordering Information<br>(0:12"'+0.005")3.05+0.13i [ i [ | (0.08''+0.004")2.03+0.10 0678 =- XXXK -- XX<br>(0 12"'+0.005")3 . 05+0.13i ! | be Fi0678-XXXX-M2USE TY P E = SMM Series<br>asocom-|<br>SMM say - (0.39"0.008") AMPERE RATING<br>0.16) 4 Refer to fuse FGNO explanation table<br>4.06mm<br>(0.16") QUANTITY & PACKAGING CODE<br>Recommended pad layout a -<br>0.22")<br>Min. copper layer thickness = 100um |toze"), I M2 = 2000 pcs with Tape and Reel<br>Min. copper trace width = 10mm<br>**----- End of picture text -----**<br>


## Mechanical Dimensions 

## Packaging 

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Packaging Tape & Reel Packaging Specification Quantity & Packaging Code<br>Feomwowm orembanrer| eases | amo | ormmoae<br>**----- End of picture text -----**<br>


Specifications subject to change without notice 

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Bel Fuse Inc. +1 201.432.0463 206 Van Vorst Street techhelp@belf.com Jersey City, NJ 07302 USA belfuse.com 

© 2016 Bel Fuse, Inc. SMM Jun2016 4/4