MASM-14 Datasheet, PDF (1/3 Pages) Littelfuse – Surface Mount Reed Switches

Surface Mount Reed Switches
Low Power > MASM-14
MASM-14 14mm Close-Differential Reed Switch
RoHS
Description
The MASM-14 surface mount reed switch is a close-differential, sub-miniature,
normally open switch with a 14mm long x 2.28mm diameter (0.551” x 0.090”)
glass envelope, capable of switching 200Vdc at 10W.
This reed switch is a surface mount version of MACD-14. It has high insulation
resistance of 10¹⁰ ohms minimum and a contact resistance of less than 100
milliohms. Both reed switches are intended for use in applications that require
low hysteresis between Pull-In and Drop-Out values.
Agency Approvals
Agency
Agency File Number
Ampere-Turns Range
Features
• Surface mount normally open
switch
• Capable of switching 200Vdc or
0.5A at up to 10W
• Low close/open hysteresis (close
differential)
E47258
E471070
DEMKO 14 ATEX 1393U
10-30 AT
10-30 AT
Dimensions
Dimensions in mm (inch)
Ø2.28 MAX
(.090)
2x1.14±0.10
(.045±.004)
2.84 MAX
(.112)
17.52±0.25
(.690±.010)
14.00 MAX
(.551)
19.30±0.25
(.760±.010)
RECOMMENDED LAND PATTERN
2x3.05 (.120)
2x1.65 (.065)
2x0.00 MIN
(.000)
14.60
(.575)
Note: Land pattern is Littelfuse recommendation only. User is responsible for proper PCB design.
Electrical Ratings
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 micro-
controller logic level loads
Applications
• Position Sensing
• Level Sensing
• Security
• Industrial Controls
• Office Equipment
• Home Appliances
Switch Type
Contact Form
A (SPST-NO)
Materials
Body: Glass
Leads: Tin-plated Ni-Fe wire
Note: SPST-NO = Single-pole, single-throw, normally open
Contact Rating ¹
W/VA - max.
10
Voltage ³
Current ³
Resistance
Switching ²
Breakdown ⁴
Switching ²
Carry
Contact, Initial
Insulation
Vdc - max.
Vac - max.
Vdc - min.
Adc - max.
Aac - max.
Adc - max.
Ω - max.
Ω - min.
200
140
200
0.50
0.35
1.00
0.100
10¹⁰
Capacitance
Contact
pF - typ.
0.3
Temperature
Operating
Storage ⁵
°C
-40 to +125
°C
-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.
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