Littelfuse MLRR-4-17-28AT 15.2mm sub-miniature close differential reed switch Datasheet

Axial Lead Reed Switches
High Power > MLRR-4
MLRR-4 15.2mm Sub-miniature Close Differential Reed Switch
RoHS
Description
The MLRR-4 Reed Switch is a sub-miniature, normally open switch with a
15.24mm long x 2.54mm diameter (0.600” x 0.100”) glass envelope, and capable
of switching 200Vdc at 20W with close differential (CD) characteristics. It has
high insulation resistance of 1010 ohms minimum and contact resistance less
than 100 milli-ohms. It can handle lamp loads up to 2W @ 14V with no suppression
circuitry. This reed switch is also available in a surface mount version,
that is, MLSM-4.
Features
• Sub-miniature normally open switch
• Capable of switching 200Vdc or
1.0A at up to 20W
• Close differential AT between PI
and DO value
Agency Approvals
Agency
Agency File Number
Ampere-Turns Range
E47258
E471070
17-38 AT
DEMKO 14 ATEX 1393U
17-38 AT
Dimensions
• Available sensitivity range 17-38 AT
• Capable of switching small
incandescent lamp loads
Benefits
• Hermetically sealed switch contacts
are not affected by and have no
effect on their external environment
• Zero operating power required for
contact closure
• Excellent for switching
microcontroller logic level loads and
small incandesent lamp loads
Applications
Dimensions in mm
20.19
(.795) REF.
CL OF OVERLAP
Ø2.66
(.105) MAX.
0.61
(0.024) DIA. REF.
• Position Sensing
• Security Systems
• Level Sensing
• Light Inductive Loads
• Office Equipments
• Lamp Loads up to 2W @ 14V
Switch Type
12.19
(.480) MIN.
15.24
(.600) MAX.
40.38
(1.590) NOM.
A (SPST-NO)
Materials
Body: Glass
Leads: Tin Plated Nickel Iron
Note: SPST-NO = Single-pole, single-throw, normally open
Electrical Ratings
Contact Rating
Contact Form
Watt - max.
20
Vdc - max.
Vac - max.
Vdc - min.
200
140
250
Carry
Adc - max.
Aac - max.
Adc - max.
1.0
0.7
1.0
Resistance
Contact, Initial
Insulation
Ω - max.
Ω - min.
0.10
1010
Capacitance
Contact
pF - typ.
0.4
Temperature
Operating
Storage 5
°C
°C
-40 to +125
-65 to +125
Voltage
3
Current
3
1
Switching
2
Breakdown
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
High Power > MLRR-4
MLRR-4 15.2mm Sub-miniature Close Differential Reed Switch
Product Characteristics
Operating Characteristics
Operate Time
1
0.6ms - max.
Release Time
1
0.2ms - max.
Shock
11ms 1∕2 sine wave
2
Vibration
100G - max.
50-2000 Hertz
2
30G - max.
Resonant Frequency
6.25kHz - typ.
Magnetic Characteristics
Pull-In Range
Ampere Turns
3
Rating Sensitivity
17-38
Ampere Turns
4
20
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
MLRR-4-17-23
40
Max.
35
Drop-Out (AT, L4989 Coil)
30
Min.
Series
25
20
15
10
5
0
0
5
10
15
20
25
30
35
40
45
50
Pull-In (AT, L4989 Coil)
Note: The chart represents the range of Drop-Out, minimum to maximum for a given Pull-In value.
AT Range
17-23 AT
17-28 AT
22-28 AT
22-33 AT
27-33 AT
27-38 AT
32-38 AT
Example:
17-23 AT product is
MLRR-4-17-23
Note: This AT value is the before-modification value of the bare reed switch.
Additional Information
Datasheet
Resources
Samples
Packaging
Packaging Option
Packaging Specification
Bulk
© 2015 Littelfuse
Specifications are subject to change without notice.
Bulk
Quantity
3000
Quantity & Packaging Code
N/A
Taping Width
N/A
littelfuse.com
Similar pages