DBI25 Three Phase Bridges

Application Note
Three Phase Bridge DBI25-18A Ensuring the Requirements of EN61000-4-5 at Industrial Mains
Three Phase Bridge DBI25-18A
Ensuring the Requirements of EN61000-4-5 at Industrial Mains
Industrial mains can have 600VRMS and even more (1). That requires the usage of 2x 320VRMS varistors for
input voltage surge protection, to fulfill the requirtements of EN61000-4-5. Such varistors have a clamping
voltage of typically 2x 840V = 1680V, making the industry standard 1600V input bridges working at or even
over the limit (2). This design gap can be managed by using the next generation three phase bridge
DBI25-18A by Diotec. Its 1800V VRRM provides a comfortable safety margin, allowing for reliable
operation of industrial power supplies and frequency inverters (3).
2
2x 840 VC = 1680 V !
(2x 320 VRMS )
Rt
1 575…600 VRMS
L1
L2
L3
CL
DBI25-18A
1600 VRRM
3 1800 VRRM √
Features of the DBI25 series
✔
✔
✔
✔
✔
✔
✔
VRRM from 800V to 1800V
IFAV = 25A at TC = 115°C (Heatsink Assembly)
IFAV = 4A at TA = 50°C (Free-Standing)
Solderable Leads for Direct PCB Assembly
Only One Screw required for Heatsink Assembly
Case Fully Isolated (Viso = 2500V~)
Sufficient Clearance and Creepage
>4mm!
DBI25-18A
DBI25-xxA series:
Pin Outline – ~~~ +
DBI20-16B
DBI20-xxB series:
Pin Outline + ~~~ –
(20A, 800...1600V)
For detailed data sheets, type the part number into
the “Search” field on http://www.diotec.com/
© Diotec Semiconductor AG
1/1
2016-05-04
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