Axial Lead Reed Switches
Low Power > MACD-14
MACD-14 14mm Close-Differential Reed Switch
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Description
The MACD-14 reed switch is a close-differential, sub-miniature, normally open
switch with a 14.00mm long x 2.28mm diameter (0.551” x 0.090”) glass
envelope, capable of switching 200Vdc at 10W.
This reed switch is also available in a surface mount version, MASM-14. It has
a high insulation resistance of 1010 ohms minimum and contact resistance less
than 100 milli-ohms. Both reed switches are intended for use in applications
that require low hysteresis between Pull-In and Drop-Out values.
Features
• Low close/open hysteresis (close
differential)
• Normally open switch
• Capable of switching
• UL Recognized for use in Class I,
Division 2, Groups A, B, C and D
and Class I, Zone 2, AEx/Ex nC IIC
Hazardous Locations.
Agency Approvals
200Vdc or 0.5A at up to 10W
• UL Recognized for the US and
Canadian Markets per UL 508 and
CSA C22.2 No. 14-10.
• Evaluated as an ATEX Component
for use in Potentially Explosive
Atmospheres. Marked II 3 G Ex nC
IIC Gc.
Agency
Agency File Number
Ampere-Turns Range
E47258
E471070
10-30 AT
Benefits
Note: Contact Littelfuse for specific agency approval ratings.
• Zero operating power required for
contact closure
• Excellent for switching micro-
controller logic level loads
• Hermetically sealed switch
contacts are not affected by and
have no effect on their external
environment
Dimensions
Dimensions in mm (inch)
CL OF OVERLAP
Applications
• Position Sensing
• Level Sensing
• Security
22.15
(.872) REF.
• Industrial Controls
• Office Equipment
• Home Appliances
0.51
(.020) DIA. REF.
2.28
(.090) MAX.
Switch Type
14.80
(.583) MIN.
14.00
(.551) MAX.
Contact Form
A (SPST-NO)
44.30
(1.744) NOM.
Body: Glass
Leads: Tin-plated Ni-Fe wire
Materials
Note: SPST-NO = Single-pole, single-throw, normally open
Electrical Ratings
Contact Rating 1
W/VA - max.
10
Switching 2
Vdc - max.
Vac - max.
Vdc - min.
200
140
200
Voltage 3
Current 3
Breakdown 4
Switching 2
Adc - max.
Aac - max.
Adc - max.
0.50
0.35
1.00
Carry
Contact, Initial
Insulation
Ω - max.
Ω - min.
0.100
1010
Resistance
Capacitance
Temperature
Notes:
Contact
pF - typ.
0.3
Operating
Storage 5
°C
°C
-40 to +125
-65 to +125
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 and 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.
© 2020 Littelfuse
Revised: BO.12/07/20
littelfuse.com
Specifications are subject to change without notice.