Axial Lead Reed Switches
Low Power > MRPR-8
MRPR-8 20.3mm Miniature High Voltage Reed Switch
RoHS
Description
The MRPR-8 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-8 has high
insulation resistance of 10
10
ohms minimum and contact resistance less than
100 milli-ohms.
Features
• Miniature normally open switch
• Capable of switching 265Vac or
1.0A at up to 50W/VA
• Minimum voltage breakdown
750Vdc
• Available sensitivity range
22-43 AT
Agency Approvals
Agency
Agency File Number
E47258
E471070
DEMKO 14 ATEX 1393U
Benefits
Ampere-Turns Range
22-43 AT
22-43 AT
• Hermetically sealed switch
contacts are not affected by and
have no effect on their external
environment
• Zero operating power required
for contact
Applications
• Reed relays (suitable for switching
European mains voltage)
• Limit switching
• Telecoms line switching
• White goods applications
• European mains voltage switching
Dimensions
Dimensions in mm (inch)
CL OF OVERLAP
28.32
(1.115) REF
.
2.84
(.112) MAX.
0.63
(.025) DIA. REF
.
Switch Type
Contact Form
Materials
A (SPST-NO)
Body: Glass
Leads: Tin-plated Ni-Fe wire
18.16
(.715) MAX.
20.32
(.800) MAX.
56.64
(2.230) NOM.
Note: SPST-NO = Single-pole, single-throw, normally open
Electrical Ratings
Contact Rating
Voltage
3
1
W/VA - max.
Switching
2
50
250
265
750
1.0
0.7
2.5
0.100
10
10
0.2
-20 to +125
-65 to +125
Breakdown
3
4
Vdc - max.
Vac - max.
Vdc - min.
Adc - max.
Aac - max.
Adc - max.
Ω - max.
Ω - min.
pF - typ.
°C
°C
Current
Switching
Carry
2
Resistance
Capacitance
Temperature
Contact, Initial
Insulation
Contact
Operating
Storage
5
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.
© 2015 Littelfuse
Specifications are subject to change without notice.
littelfuse.com
Axial Lead Reed Switches
Low Power > MRPR-8
MRPR-8 20.3mm Miniature High Voltage Reed Switch
Product Characteristics
Operating Characteristics
Operate Time
Release Time
Shock
2
2
1
1
0.75ms - max.
0.3ms - max.
11ms 1∕2 sine wave
50-2000 Hertz
100G - max.
30G - max.
2.1kHz - typ.
Vibration
Resonant Frequency
Magnetic Characteristics
Pull-In Range
3
Ampere Turns
4
22-43
22
L4989
Rating Sensitivity
Test Coil
Ampere Turns
Notes:
1. Operate (including bounce)/Release Time - per EIA/NARM RS-421-A,diode suppressed coil (Coil II).
2. Shock and Vibration - per EIA/NARM RS-421-A and MIL-STD-202.
3. Pull-In Range - Contact Littelfuse for narrower AT ranges available.
4. Rating Sensitivity - The value at which contact ratings and operating characteristics are determined. Derating may be required below this value.
5. Custom modifications of forming and/or cutting of reed switches are available. Please contact Littelfuse.
Drop-Out vs. Pull-In Chart
40
35
Part Numbering System
MRPR-8-22-28
30
Drop-Out (AT, L4989 Coil)
25
Max.
Series
AT Range
22-43 AT
22-28
AT
22-33
AT
27-33
AT
27-38
AT
32-38
AT
32-43
AT
37-43
AT
20
Min.
15
10
Example:
22-28 AT product is
MRPR-8-22-28
5
0
0
5
10
15
20
25
30
35
40
45
50
Pull-In (AT, L4989 Coil)
Note: Chart represents the range of Drop-Out, min to max for a given Pull-In value.
Note: These AT values are the before-modification values of the bare reed switch.
Additional Information
Datasheet
Resources
Samples
Packaging
Packaging Option
Bulk
Packaging Specification
Bulk
Quantity
1000
Quantity & Packaging Code
N/A
Taping Width
N/A
© 2015 Littelfuse
Specifications are subject to change without notice.
littelfuse.com
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