Datasheet

Surface Mount Reed Switches
High Power > MLSM-3
MLSM-3 15.2mm Surface Mount Reed Switch
RoHS
Description
The MLSM-3 Reed Switch is a miniature, surface mounting, 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. This reed switch is a surface mount version of the MLRR-3.
It has high insulation resistance of 1010 ohms minimum and contact resistance
less than 100 milli-ohms. It can handle light inductive loads with no
suppression circuitry.
Features
• Surface mount, miniature size,
normally open switch
• Available sensitivity 17-38 AT
• Capable of switching 200Vdc or 1A
at up to 20W
Agency Approvals
Agency
Agency File Number
Ampere-Turns Range
E47258
E471070
17-38 AT
DEMKO 14 ATEX 1393U
17-38 AT
Benefits
• Hermetically sealed switch
contacts are not affected by and
have no effect on their external
environment
Dimensions
Dimensions in mm (inch)
Ø2.54
(.100)MAX
• Close differential AT between PI
and DO value
• Maximum switched current of
1.0Amps
1.22±0.10
(.048 +/-.004)
• Excellent for switching
microcontroller logic level loads
• Zero operating power required for
contact closure
Applications
• Position Sensing
• Limit Switching
• Security
17.52±0.25
(.690±.010)
15.24
(.600)MAX
• Office Equipment
• Light inductive loads
Switch Type
3.00 MAX
(.118)
19.56±0.25
(.770±.010)
2x0.00 MIN
(.000)
RECOMMENDED LAND PATTERN
1.50 (.059) TYP.
2.34 (.092) TYP.
Contact Form
A (SPST-NO)
Materials
Body: Glass
Leads: Tin-plated Ni-Fe wire
Note: SPST-NO = Single-pole, single-throw, normally open
16.26
(.640)
Note: Land pattern is Littelfuse recommendation only. User is responsible for proper PCB design.
Electrical Ratings
Contact Rating
Voltage
3
Current
3
1
Resistance
Capacitance
Temperature
Switching
2
Breakdown 4
Switching 2
Carry
Contact, Initial
Insulation
Contact
Operating
Storage 5
W/VA - max.
Vdc - max.
Vac - max.
Vdc - min.
Adc - max.
Aac - max.
Adc - max.
Ω - max.
Ω - min.
pF - typ.
°C
°C
20
200
140
250
1.0
0.7
1.2
0.10
1010
0.4
-40 to +125
-65 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
Specifications are subject to change without notice.
littelfuse.com
Surface Mount Reed Switches
High Power > MLSM-3
MLSM-3 15.2mm Surface Mount Reed Switch
Product Characteristics
Operating Characteristics
Operate Time
1
Release Time
1
Shock
0.7ms - max.
0.2ms - max.
11ms 1∕2 sine wave
2
Vibration
100G - max.
50-2000 Hertz
2
30G - max.
Resonant Frequency
6.0kHz - typ.
Magnetic Characteristics
Pull-In Range
3
Rating Sensitivity
4
Ampere Turns
17-38
Ampere Turns
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. These AT values are the before modification AT of the MLRR-3.
4. Rating Sensitivity - The value at which contact ratings and operating characteristics are determined. Derating may be required below this value.
Drop-Out vs. Pull-In Chart
Part Numbering System
40
MLSM-3R - 17-23
35
Max.
Drop-Out (AT, L4989 Coil)
30
Series
Packaging
R = Tape and Reel
B = Bulk
25
20
Min.
AT Range
15
Example:
17-23 AT product in Bulk
packaging is MLSM-3B-17-23
17-23 AT
17-28 AT
10
22-28 AT
5
22-33 AT
27-33 AT
0
0
5
10
15
20
25
30
35
40
45
50
Pull-In (AT, L4989 Coil)
27-38 AT
32-38 AT
Note: Chart represents the range of Drop-Out, min to max, for a given Pull-in value of the
MLRR-3 prior to modification inot the MLSM-3.
Note: These AT values are the before-modification values of the bare reed switch.
Additional Information
Datasheet
Resources
Samples
Packaging
Packaging Option
Tape and Reel
Packaging Specification
Quantity
Quantity and Packaging Code
Taping Width
EIA-RS-481-1
3000
R
32mm
N/A
200
B
N/A
Bulk
© 2015 Littelfuse
Specifications are subject to change without notice.
littelfuse.com
Surface Mount Reed Switches
High Power > MLSM-3
MLSM-3 15.2mm Surface Mount Reed Switch
TAPE DIMENSIONS mm (inch)
(.059 +.004
-0 )
(.315)
8,00
(.079)
2,00
Ø1,50+0,10
-0
(.069)
1,75
(.157)
4,00
7.5°
(.559)
14,20
(.240)
6,10
(1.118)
28,40
(.670)
17,02
(1.260)
32,00
(.830)
21,08
(.079)
Ø2,00
(.067 +.006
-.002 )
Ø1,70+0,15
-0,05
(.240)
6,10
(.059 +.004
-0 )
(.016)
0,41
Ø1,50+0,10
-0
3.0°
7.5°
(.075)
1,90
(.046)
1,17
(.111)
2,82
(.084)
2,13
1. ALL TAPE & SPROCKET HOLE DIMENSIONS
ARE PER EIA-481 UNLESS NOTED
2. ALL POCKET DIMENSIONS ARE ±(.004") 0,10mm
3. ALL DIMENSIONS ARE TO INSIDE OF POCKET
REEL DIMENSIONS mm (inch)
(3.937±.020)
100,0±0,50
-0,76
(1.512)
38,4 MAX.
)
16
±.0 .4
27 ±0
( .8 21,0
Ø
12
0
°T
YP
.
(.075±.016)
1,9±0.4 TYP.
+.010
(12.992-.030 )
330,00 +0,25
(1.276+.008
)
-0
(32,4 +0.2
)
-0
MEASURED AT HUB
(.512±.008)
Ø13,0±0.2
© 2015 Littelfuse
Specifications are subject to change without notice.
littelfuse.com