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Firstohm

What's New at Firstohm Autumn 2018

What's New at Firstohm

Q3 2018

 

For more than 30 years, Firstohm’s MELF resistors have successfully met the demanding requirements of the industry applications. (EX : power supply, Telecom, Test & Measurement, Medical, Automotive & LED Lighting)

melf size

The resistors’ cylindrical 0102, 0204, and 0207 case sizes -equivalent to flat chip sizes 0805, 1206, and 2512 are suitable for various application requirements.
The cylindrical construction of MELF devices provides an optimal pulse load and heat dissipation capability.
 
Below testing explores why this resistor series has become so successful, and why there is often no alternative to it today in professional applications.
 
Test 1: Pulse Load Capability (Superior surge protection than chip resistors)
Firstohm SRM204T and anti-surge 1206 chip resistor of Company V1 connected in series AC 12.25W applied individually:
comparsion 3
As shown in the diagram, chip resistors open at same power loads as MELF resistors.
 
Test 2 : Heat Dissipation Capability
Test voltage: 21.2Vdc (0.5 times rated power)
Duration: Add the voltage for 0.5 hours and then adding the fan for 0.5 hours
Comparison of the internal heat resistance (Rthi): 
comparsion 4
Advantage Firstohm: (Better heat dissipation) ; ΔT = Tb - Ta : 17°C~20°C

 

 Latest In Action

  Latest company profile brochure now is available for download online. New datasheets will be updated later this year.

2018 cover

 

★9/26/2018 ~ 9/28/2018 (electronica India 2018)

electronica india 2018

Firstohm’s Booth: HALL 4 EK19

 

★ 11/13/2018 ~ 11/16/2018 (electronica 2018 in Munich)

electrica logo2018

Come to Munich Messe and meet us at the Hall B6.434

 

Remember, for more information, you can always contact your designated Firstohm sales representative or simply via contact us.