Axial Lead Reed Switches
High Power > MARR-5
MARR-5 14mm Reed Switch
07/17/2017
MVSR-20
RoHS
N/A
Description
The MARR-5 reed switch is a miniature, normally open switch with a 19.69mm
long x 2.66mm diameter (0.775” x 0.105”) glass envelope, capable of high voltage
switching of up to 1kVdc at 1mA. It has high insulation resistance of 10¹² ohms
minimum and contact resistance less than 100 milli-ohms.
Features
• Miniature normally open switch
• Capable of switching 1000Vdc at
1mA or 0.5A up to 10W
• Minimum voltage breakdown
2000 Vdc
• Available sensitivity range 17-38 AT
Agency Approvals
Agency
Agency File Number
E47258
E471070
DEMKO 14 ATEX 1393U
Note: Contact Littelfuse for specific agency approval ratings.
Benefits
Ampere-Turns Range
17-38 AT
17-38 AT
• Hermetically sealed switch
contacts are not affected by and
have no effect on their external
environment
• Zero operating power required
for contact closure
Applications
• Reed relays (particularly suitable
for high voltage breakdown
applications)
• Security
• Limit switching
• Telecoms line switching
• Office equipment
Dimensions
Dimensions in mm (inch)
CL OF OVERLAP
(1.117) REF.
28.37
(.105) MAX.
2.66
(.022) DIA. REF.
0.55
Switch Type
Contact Form
Materials
A (SPST-NO)
Body: Glass
Leads: Tin-plated Ni-Fe wire
Note: SPST-NO = Single-pole, single-throw, normally open
(.685) MIN.
17.39
(.775) MAX.
19.69
(2.235) NOM.
56.77
Electrical Ratings
Contact Rating
Voltage
Current
3
1
W/VA - max.
Switching
2
Breakdown
4
Switching
Carry
2
10
1000
2000
0.50
1.30
0.100
10
12
0.2
-75 to +125
-75 to +125
Vdc - max.
Vdc - min.
Adc - max.
Adc - max.
Ω - max.
Ω - min.
pF - typ.
°C
°C
3
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.
© 2018 Littelfuse
Revised: 01/11/18
Specifications are subject to change without notice.
littelfuse.com
Surface Mount Reed Switches
High Power > MARR-5
MARR-5 14mm Reed Switch
07/17/2017
MVSR-20
N/A
Product Characteristics
Operating Characteristics
Operate Time
Release Time
Shock
2
2
1
1
0.75ms - max.
0.30ms - max.
11ms 1∕2 sine wave
50-2000 Hertz
100G - max.
30G - max.
3.2kHz - typ.
Vibration
Resonant Frequency
Magnetic Characteristics
Pull-In Range
3
Ampere Turns
4
17-38
35
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
30
Max.
Part Numbering System
MARR-5-22-28
25
Drop-Out (AT, L4989 Coil)
20
Min.
Series
AT Range
17-23 AT
Example:
17-28 AT
22-28 AT product is
22-28 AT
MARR-5-22-28
22-33 AT
27-33 AT
27-38 AT
32-38 AT
Note: These AT values are the before-modification values of the bare reed switch.
40
15
10
5
0
0
5
10
15
20
25
30
35
Pull-In (AT, L4989 Coil)
Note: Chart represents the range of Drop Out, min to max for a given Pull-In value.
Packaging
Packaging Option
Bulk
Packaging Specification
Bulk
Quantity
1000
Quantity & Packaging Code
N/A
Taping Width
N/A
© 2018 Littelfuse
Revised: 01/11/18
Specifications are subject to change without notice.
littelfuse.com
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