Datasheet

Series CRF V I T R O H M
Revision 201501
VITROHM PORTUGUESA, Lda. – Est. Nacional 249-4, Trajouce – 2765-653 S. Domingos de Rana – PORTUGAL File Nr: 3200.18.450.121.11
Tel:+ 351 214 457 700 - Fax:+ 351 214 457 755 – Germany Sales Tel:+ 49 4121 870 103 - e-mail: [e-mail] – www.vitrohm.com 2
DIMENSIONS [mm]
Type L max
 D max *  d
CRF251-4 9,0 3,0 0,65
CRF252-4 9,7 4,0 0,80
CRF253-4 14,5 4,5 0,65
CRF254-4 12,6 6,0 0,80
CRF256-4 17,0 6,0 0,80
CRF257-4 18,0 8,5 0,80
*R <10R D max.+1
FUSING PERFORMANCE
Resistance range
CRF251-4 CRF252-4 CRF253-4 CRF254-4 CRF256-4 CRF257-4
*1R … 100R *1R … 240R *1R … 330R *1R … 330R *1R … 330R *1R … 330R
Note: The special construction off resistance values >10R results in an immediate interruption (<1s, 200[ms] typical), when mains voltage
(120/230[V]
RMS
) is applied. No flames, no explosion. After fusing, the resistance value Is 100K.
* The interruption mechanism for resistance values <10R and resistance values >max. range is not clearly defined, also for other voltage.
Need to be tested in the final application
PULSE PERFORMANCE
Beside fusible, this resistor also acts as in-rush current limiting for normal operation.
NOTE: The voltage shown in the below table, is the net voltage
across the resistor. The generator open voltage will be higher due to
the generator’s internal impedance (12[]).
Pulse shape – 10 pulses @ 20 [s] interval