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LITTELFUSE REED SWITCH SELECTION GUIDE
A quick reference guide to selecting reed switches for electronic applications
Power Size Terminals Switch Type Package Pictures P/N
Body Length
(mm)/[Inch]
Total Length
(mm)/[Inch]
Switching
Power (W)
Switching
Voltage (V)
Switching
Current (A)
Contact
Resistance (Ω)
Operating
Temperature (°C)
Magnetic
Sensitivity (AT) Certification
RoHS
Compliance
Low
Power
Small
Leads
A: SPST-NO Glass
MITI-3V1 7.00 [.276] 46.00 (1.811) 10 170 Vdc, 120 Vac 0.25 Adc, 0.18 Aac 0.15 -40 to +125 6-10 RoHS
A: SPST-NO Glass MDSR-10 10.16 [.400] 40.38 [1.590] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.12 -40 to +125 10-25
RoHS
A: SPST-NO Glass MDSR-7 12.70 [.500] 40.38 [1.590] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.1 -40 to +125 10-25
RoHS
SMD
A: SPST-NO Glass
MISM-3V1 7.0 0 [.276] 13.72 [.540] 10 170 Vdc, 120 Vac 0.25 Adc, 0.18 Aac 0.15 -40 to +125 6-10 RoHS
A: SPST-NO Glass MDSM-10 10.16 [.400] 15.62 [.615] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.12 -40 to +125 10-25
RoHS
Medium
Leads
A: SPST-NO Glass FLEX-14 14.00 [.551] 44.30 [1.744] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.1 -40 to +125 10-30 RoHS
A: SPST-NO Glass MDCG-4 15.24 [.600] 40.38 [1.590] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.1 -40 to +125 12-38
RoHS
A: SPST-NO Glass MACD-14 14.00 [.551] 44.30 [1.744] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.1 -40 to +125 10-30
RoHS
C: SPDT-CO Glass
MDRR-DT 14.73 [.580] 51.66 [2.034] 5 175 Vdc, 120 Vac 0.25 Adc, 0.18 Aac 0.1 -40 to +125 15-30 RoHS
SMD
A: SPST-NO Glass
MDSM-4 15.24 [.600] 19.30 [.760] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.1 -40 to +125 12-38 RoHS
A: SPST-NO Glass MASM-14 14.00 [.551] 44.30 [1.744] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.1 -40 to +125 10-30
RoHS
C: SPDT-CO Glass
MDSM-DT 14.73 [.580] 25.40 [1.00] 5 175 Vdc, 120 Vac 0.25 Adc, 0.18 Aac 0.1 -40 to +125 15-30 RoHS
Both
Leads
and SMD
A: SPST-NO Overmolded
59165 16.00 [.630] 20.20 [.795] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.1 -40 to +125 10-25 RoHS
A: SPST-NO Overmolded 59166 16.00 [.630] 19.51 [.768] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.1 -40 to +125 10-25
RoHS
A: SPST-NO Overmolded 59170 11.43 [.450] 16.25 [.640] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.15 -40 to +125 10-25
RoHS
Leads
A: SPST-NO Overmolded
59045-1 17.78 [.700] 15.24 [.600] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.2 -40 to +105 15-30 RoHS
A: SPST-NO Overmolded 59050-1 22.86 [.900] 20.32 [.800] 10 200 Vdc, 140 Vac 0.5 Adc, 0.35 Aac 0.2 -40 to +105 12-28
RoHS
High
Power
Medium
Leads
A: SPST-NO Glass
HA15-2 15.24 [.600] 40.38 [1.590] 20 200 Vdc, 265 Vac 0.5 Adc, 0.35 Aac 0.1 -20 to +125 17-33 RoHS
A: SPST-NO Glass MLRR-4 15.24 [.600] 40.38 [1.590] 20 200 Vdc, 140 Vac 1.0 Adc, 0.7Aac 0.1 -40 to +125 17-38
RoHS
A: SPST-NO Glass MLRR-3 15.24 [.600] 56.64 [2.230] 20 200 Vdc, 140 Vac 1.0 Adc, 0.7Aac 0.1 -40 to +125 17-38
RoHS
A: SPST-NO Glass MARR-5 19.69 [.775] 56.77 [2.235] 10 1000 Vdc, 700 Vac 0.5 Adc, 0.35 Aac 0.1 -75 to +125 17-38
RoHS
SMD
A: SPST-NO Glass
MLSM-4 15.24 [.600] 19.56 [.770] 20 200 Vdc, 140 Vac 1.0 Adc, 0.7Aac 0.1 -40 to +125 17-38 RoHS
A: SPST-NO Glass MLSM-3 15.24 [.600] 19.56 [.770] 20 200 Vdc, 140 Vac 1.0 Adc, 0.7Aac 0.1 -40 to +125 17-38
RoHS
Leads A: SPST-NO Overmolded
59050-2 22.86 [.900] 20.32 [.800] 20 200 Vdc, 265 Vac 0.5 Adc, 0.35 Aac 0.2 -20 to +105 17-28 RoHS
Leads
A: SPST-NO Glass
MRPR-3 19.69 [.775] 56.64 [2.230] 50 200 Vdc, 140 Vac 1.5 Adc, 1.1 Aac 0.1 -40 to +125 22-43 RoHS
A: SPST-NO Glass MRPR-8 20.32 [.800] 56.64 [2.230] 50 250 Vdc, 265 Vac 1.0 Adc, 0.7Aac 0.1 -20 to +125 22-43
RoHS
Large
A: SPST-NO Glass DRR-129 50.80 [2.000] 82.55 [3.250] 100 400 Vdc, 280 Vac 3.0 Adc, 2.1 Aac 0.1 -40 to +125 42-83
RoHS
C: SPDT-CO Glass
DRR-DTH 39.67 [1.562] 85.73 [3.375] 30 500 Vdc, 350 Vac 0.5 Adc, 0.35 Aac 0.125 -20 to +125 50-80 RoHS
C: SPDT-CO Glass DRT-DTH 39.67 [1.562] 85.73 [3.375] 50 500 Vdc, 350 Vac 1.5 Adc, 1.0 Aac 0.5 -20 to +125 50-80 RoHS
Notes:
For details on electrical specifications, visit littelfuse.com
A:SPST-NO - Single Pole Single Throw - Normally Open
C:SPDT-CO - Single Pole Double Throw - Change Over
Applications Assistance and Custom Switch Modification
Littelfuse offers complete application engineering assistance in selecting the correct switch,
sensitivity, and configuration. Switch life is affected by electrical load and other operating
conditions. Littelfuse offers load / life information per customer request.
Lead Modifications
Littelfuse can cut and/or form the reed switch leads to meet your dimensional requirements.
Most lead modifications can be done by Littelfuse with no additional tooling costs.
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