Axial Lead Reed Switches
High Power > MARR-5
MARR-5 14mm Reed Switch
RoHS
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 10 ohms
minimum and contact resistance less than 100 milli-ohms.
Features
Miniature normally open switch Minimum voltage breakdown
Capable of switching 1000Vdc at 2000 Vdc
1mA or 0.5A up to 10W Available sensitivity range 17-38 AT
Benefits
Zero operating power required
Hermetically sealed switch
Agency Approvals
for contact closure
contacts are not affected by and
have no effect on their external
Agency Agency File Number Ampere-Turns Range
environment
E47258
17-38 AT
Applications
E471070
Limit switching
Reed relays (particularly suitable
DEMKO 14 ATEX 1393U 17-38 AT
Telecoms line switching
for high voltage breakdown
Office equipment
applications)
Security
Dimensions
Dimensions in mm (inch)
Switch Type
CLOFOVERLAP
(1.117)REF.
28.37 Contact Form A (SPST-NO)
(.105)MAX.
(.022)DIA.REF.
2.66
Body: Glass
0.55
Materials
Leads: Tin-plated Ni-Fe wire
(.685)MIN. (.775)MAX.
Note: SPST-NO = Single-pole, single-throw, normally open
17.39 19.69
(2.235)NOM.
56.77
Electrical Ratings
1
Contact Rating W/VA - max. 10
2
Switching Vdc - max. 1000
3
Voltage
4
Breakdown Vdc - min. 2000
2
Switching Adc - max. 0.50
3
Current
Carry Adc - max. 1.30
Contact, Initial - max. 0.100
Resistance
12
Insulation - min. 10
Capacitance Contact pF - typ. 0.2
Operating C -75 to +125
Temperature
5
Storage C
-75 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.
2015 Littelfuse littelfuse.com
Specifications are subject to change without notice.Surface Mount Reed Switches
High Power > MASM-14
MARR-5 14mm Reed Switch
Product Characteristics
Operating Characteristics
1
Operate Time 0.75ms - max.
1
Release Time 0.30ms - max.
2
Shock 11ms 12 sine wave 100G - max.
2
Vibration 50-2000 Hertz 30G - max.
Resonant Frequency 3.2kHz - typ.
Magnetic Characteristics
3
Pull-In Range Ampere Turns 17-38
4
Rating Sensitivity Ampere Turns 35
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
30
Max.
MARR-5-22-28
25
20
Series
Min.
AT Range
15
17-23 AT
Example:
17-28 AT
22-28 AT product is
10
22-28 AT
MARR-5-22-28
22-33 AT
27-33 AT
5
27-38 AT
32-38 AT
Note: These AT values are the before-modification values of the bare reed switch.
0
0 5 10 15 20 25 30 35 40
Pull-In (AT, L4989 Coil)
Additional Information
Note: Chart represents the range of Drop Out, min to max for a given Pull-In value.
Datasheet
Resources Samples
Packaging
Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width
Bulk Bulk 1000 N/A N/A
2015 Littelfuse 2015 Littelfuse littelfuse.comlittelfuse.com
Specifications are subject to change without notice.Specifications are subject to change without notice.
Drop-Out (AT, L4989 Coil)