Reed Switches Datasheet
Axial Lead Reed Switches
MRPR-20
20.3mm Miniature High Voltage and High Power Reed Switch
RoHS
Description
The MRPR-20 Reed Switch is a miniature, normally open switch with a 20.32mm
long x 2.84mm diameter (0.800” x 0.112”) glass envelope, capable of high
voltage and power switching of 265Vac at 50VA. The MRPR-20 has high
insulation resistance of 1010 ohms minimum and contact resistance less than
100 milli-ohms.
Features & Benefits
■ Miniature normally open
■ Approved to EN 60079-0 and
switch
EN 60079-15.
■ Capable of switching 265Vac
or 1.5A at up to 50W/VA
■ Hermetically sealed switch
contacts are not affected by
and have no effect on their
external environment
■ Minimum breakdown voltage
750Vdc
■ Zero operating power
required
for contact
■ Available sensitivity range
17-43 AT
■ UL Recognized to UL 121201,
UL 60079-0, UL 60079-15,
C22.2 No. 213-17, C22.2
No. 60079-0 and C22.2 No.
60079-15.
Agency Approvals
■ High voltage and power
switching with a miniature
switch
Agency
Agency File Number
Ampere-Turns Range
E47258, E471070
17-43 AT
Note: Contact Littelfuse for specific agency approval ratings.
Applications
Dimensions
■ Reed relays (suitable for
switching global mains
voltage)
■ Telecom line switching
■ Heavy Load Switching
Dimensions in mm (inch)
0.63
(.025) DIA. REF.
CL OF OVERLAP
28.32
■ Limit switching
(1.115) REF.
2.84
(.112) MAX.
SwitchType
Contact Form
Materials
A (SPST-NO)
Body: Glass
Leads: Tin-plated Ni-Fe wire
18.16
(.715) MIN.
20.32
(.800) MAX.
56.64
(2.230) NOM.
Note: SPST-NO = Single-pole, single-throw, normally open
Electrical Ratings
Contact Rating 1
W/VA - max.
50
Switching 2
Vdc - max.
Vac - max.
Vdc - min.
Adc - max.
Aac - max.
Adc - max.
Ω - max.
250
265
750
1.5
1.1
3.0
Voltage 3
Current 3
Breakdown 4
Switching 2
Carry
Contact, Initial
Insulation
Contact
0.100
Resistance
Capacitance
Temperature
Ω - min.
pF - typ.
1010
0.2
Operating
Storage 5
°C
°C
-20 to +125
-65 to +125
Notes:
1. Contact rating - Product of the switching voltage and current should never exceed the wattage rating. Contact Littelfuse for additional load/life information.
2. When switching inductive and/or capacitive loads, the effects of transient voltages and/or currents should be considered. Refer to Application Notes AN108A and AN107 for details.
3. Electrical Load Life Expectancy - Contact Littelfuse with voltage, current values along with type of load.
4. Breakdown Voltage - per MIL-STD-202, Method 301.
5. Storage Temperature - Long time exposure at elevated temperature may degrade solderability of the leads.
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
1
Revised: GD. 09/22/21