Littelfuse MRPR-3 Axial lead reed switch Datasheet

Axial Lead Reed Switches
Low Power > MRPR-3
MRPR-3 19.7mm Miniature Reed Switch
RoHS
Description
The MRPR-3 Reed Switch is a miniature, normally open switch with a 19.69mm
long x 2.84mm diameter (0.770” x .112”) glass envelope, capable of switching up
to 200Vdc at 50W. The MRPR-3 has high insulation resistance of 1010 ohms
minimum and contact resistance less than 100 milli-ohms.
Features
• Miniature normally open switch
• Switch contacts capable of
switching 200Vdc or 1.5A at
up to 50W.
Agency Approvals
Benefits
Agency File Number
Ampere-Turns Range
E47258
E471070
22-43 AT
• Hermetically sealed switch
contacts are not affected by and
have no effect on their external
environment
DEMKO 14 ATEX 1393U
22-43 AT
Applications
Agency
• Limit Switching
• Telephone Line Switching
• Office Equipments
Dimensions
Dimensions in mm (inch)
0.63
(.025) DIA. REF.
CL OF OVERLAP
• Zero operating power required
for contact
• Power switching with a
miniature switch
• Heavy Load Switching
• Light Inductive Loads
Switch Type
28.32
(1.115) REF.
2.84
(.112) MAX.
13.16
(.715) MAX.
• Available sensitivity range
22-43 AT
Contact Form
A (SPST-NO)
Materials
Body: Glass
Leads: Tin-plated Ni-Fe wire
Note: SPST-NO = Single-pole, single-throw, normally open
19.69
(.775) MAX.
56.64
(2.230) NOM.
Electrical Ratings
Contact Rating
W/VA - max.
50
Vdc - max.
Vac - max.
Vdc - min.
200
140
300
Carry
Adc - max.
Aac - max.
Adc - max.
1.5
1.1
3.0
Contact, Initial
Insulation
Ω - max.
Ω - min.
0.100
1010
Capacitance
Contact
pF - typ.
0.2
Temperature
Operating
Storage 5
°C
°C
-40 to +125
-65 to +125
Voltage
3
Current
3
1
Switching
2
Breakdown
Resistance
Switching
4
2
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-3
MRPR-3 19.7mm Miniature Reed Switch
Product Characteristics
Operating Characteristics
Operate Time
1
0.75ms - max.
Release Time
1
0.3ms - max.
Shock
2
Vibration
11ms 1∕2 sine wave
100G - max.
50-2000 Hertz
30G - max.
2
Resonant Frequency
2.1kHz - typ.
Magnetic Characteristics
Pull-In Range
3
Rating Sensitivity
4
Ampere Turns
22-43
Ampere Turns
22
Test Coil
L4989
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
Part Numbering System
MRPR-3-22-28
25
Max.
Drop-Out (AT, L4989 Coil)
20
15
Series
Min.
10
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.
Example:
22-28 AT product is
MRPR-3-22-28
Note: These AT values are the before-modification values of the bare reed switch.
Additional Information
Datasheet
AT Range
22-28 AT
22-33 AT
27-33 AT
27-38 AT
32-38 AT
32-43 AT
37-43 AT
Samples
Resources
Packaging
Packaging Option
Packaging Specification
Bulk
© 2015 Littelfuse
Specifications are subject to change without notice.
Bulk
Quantity
1000
Quantity & Packaging Code
N/A
Taping Width
N/A
littelfuse.com
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