Microsemi Diodes for MRI Applications!

Microsemi has long been a leading supplier of PIN diode switches used in magnetic resonance imaging (MRI) systems. Of particular significance are their proprietary design breakthroughs and manufacturing techniques that optimize performance from a combination of innovative thermally-matched packaging, low inductance diode silicon chips, and a proprietary construction process that uses full-faced metallurgical bonds to both surfaces of the chips. These devices provide higher power handling capability with a lower bias current requirement.

Select from Microsemi’s broad line of MRI diode products, for applications such as Switching, Receive Arrays, Transmit/Receive Control Boards, and Receiver Protection.

Microsemi Diodes for MRI Applications
Switching Diodes
Part Number VBR (V) CT (pF) VF (V) Carrier Lifetime (μs) Rs(Ω) @ IF(mA)
HUM2015D 1500 3.5 0.85 20 0.1 @ 500
HUM2015SM 1500 3.5 0.85 20 0.1 @ 500
HUM2020 2000 3.5 0.85 20 0.1 @ 500
HUM2020B 2000 3.5 0.85 20 0.1 @ 500
HUM2020C 2000 3.5 0.85 20 0.1 @ 500
PIN Diodes for Receive Arrays
Part Number VBR (V) CT (pF) VF (V) Carrier Lifetime (μs) Rs(Ω) @ IF(mA)
MPP4204   25    0.15   - 20  2.0 @ 10
UM7201   100   2.2 -  1.5    0.25  @ 100
UM7201SM   100   2.2 -  1.5    0.25  @ 100
UM9601   100    1.2   0.85  2   0.6 @ 100
UM9701   100    1.8   0.8  1.5    0.8 @ 10
UM9995   100    1.2   0.85  2    0.6 @ 100
UMX5101SM   100    1.2   0.82  2.5    0.8 @ 100
UMX5601SM   100   2.6 0.75  5    0.3 @ 100
PIN Diodes for Transmit/Receive Control Boards
Part Number VBR (V) CT (pF) Carrier Lifetime (μs) Rs(Ω) @ IF(mA)
UM4001   100    3.0    5   0.3 @ 100
UM4301   100    2.2    6   1.5 @ 100
UM6201   100    1.1    0.6   0.4 @ 100
UM7101   100    1.2    2   0.6 @ 100
UM7301   100    0.7    4   3.0 @ 100
Receiver Protection Diodes
Part Number VBR (V) CT (pF) VF (V) Carrier Lifetime (μs) Rs(Ω) @ IF(mA)
SMX0509MR-M1 500 1.2 - 2.5  0.35 @ 100
UM9989SM  75    1.2   1.2 -  -
UMX9989AP  75   4 1.2 -  -

MRI Device Selector Guide


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