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Specifications are subject to change without notice.
MLRR-4 15.2mm Sub-miniature Close Differential Reed Switch
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 10
10
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.
Agency Approvals
Agency Agency File Number Ampere-Turns Range
E47258
E471070
17-38 AT
DEMKO 14 ATEX 1393U 17-38 AT
Switch Type
Contact Form A (SPST-NO)
Materials
Body: Glass
Leads: Tin Plated Nickel Iron
Axial Lead Reed Switches
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
• 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
• Position Sensing
• Security Systems
• Level Sensing
• Light Inductive Loads
• Office Equipments
• Lamp Loads up to 2W @ 14V
Dimensions
Dimensions in mm
Electrical Ratings
Contact Rating
1
Watt - max. 20
Voltage
3
Switching
2
Breakdown
4
Vdc - max.
Vac - max.
Vdc - min.
200
140
250
Current
3
Switching
2
Carry
Adc - max.
Aac - max.
Adc - max.
1.0
0.7
1.0
Resistance
Contact, Initial
Insulation
Ω - max.
Ω - min.
0.10
10
10
Capacitance Contact pF - typ. 0.4
Temperature
Operating
Storage
5
°C
°C
-40 to +125
-65 to +125
High Power > MLRR-4
RoHS
Note: SPST-NO = Single-pole, single-throw, normally open
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.
CL OF OVERLAP
20.19
(.795) REF.
12.19
(.480) MIN.
15.24
(.600) MAX.
40.38
Ø2.66
(.105) MAX.
0.61
