MERSEN reserves the right to change, update or correct, without notice, any information contained in this datasheet 
Switch Body
Accessories
Ampere Rating 100 200 250 320 400
1000VDC
2-pole Configuration MD100U11 MD200U11 MD250U11 MD320U11 MD400U11
1000VDC
2x2-pole Configuration MD180U22 MD180U22 MD180U22 MD320U22 MD400U22
1500VDC
2-pole Configuration MD250UV12 MD320UV12 MD400UV12
Direct Front Operation
1000VDC HDD250 HDD250 HDD250 HDD400 HDD400
1500VDC HDD400 HDD400 HDD400
External Pistol Style
NEMA Type 1, 3R, 12 HB65, HB80 HB125, HB145
NEMA Type 4, 4X HB65X, HB80X HB125X, HB145X
B=Black  Substitute ‘R’ for ‘B’ if a red handle is desired  Ex  HR65
Shafts
Shaft—SPAxxx
(xxx = length in mm),
SFBxxx (xxx = length in mm)
SPA130, SPA210, SPA290,
SPA360, SPA430 SFB185, SFB280, SFB325, SFB395, SFB535
Auxiliary Contacts*
NO Right side mounting OA1G10 OA1G10 OA1G10 OA1G10 OA1G10
NC left side mounting OA3G01 OA3G01 OA3G01 OA3G01 OA3G01
Module for SF aux  contacts OEA28 OEA28 OEA28 OEA28 OEA28
*  2A max continous @690VAC
Terminal Shroud for Short Circuit Link
For MDxxxU11, UV12 JC250 JC250 JC500 JC500 JC500
For MDxxxU22 JC500-2 JC500-2 JC500-2 JC500-2 JC500-2
Terminal Shroud for Lugs
Kit of 4 Terminal Shrouds
1 Terminal Shroud TDS400 TDS400 TDS400 TDS400 TDS400
A shorter version is available for DC switches up to 250A  1 piece per package: TDS250S 
MD100U11 MD100U22 MD250UV12 MD400U11 MD400U22
HDD400
HB125
OA1G01
OA1G10
JC250
JC500
JC500-2
OEA28
PV-  Disconnect Switches
UL 98B Listed DC Switches
 
Handles
and Shafts
DISCONNET SWITCHES FOR PV APPLICATION
HELIOPROTECTION®
EP MERSEN COM 229
MERSEN reserves the right to change, update or correct, without notice, any information contained in this datasheet 
HELIOPROTECTION®
PV-  Disconnect Switches  
UL 98B DC-  Non-Fused switches
Part # Description Ref #
MD100U11 DC Switch 100A UL 2p X1043231
MD180U22 DC Switch 180A UL 4p Y1043232