Reed Switches Datasheet
MISM-7
7mm Surface Mount Reed Switch
RoHS
Description
The MISM-7 surface mount reed switch is a sub-miniature,
normally open switch with a 7mm long x 1.8mm diameter (0.276”
x 0.071”) glass envelope, capable of switching up to 0.25 Amps.
This reed switch is a surface mount version of the MITI-7. It has a
high insulation resistance of 1012 Ohms minimum and a contact
resistance of less than 150 milliohms.
Features & Benefits
■ Ultra-miniature surface mount
■ Zero operating power
required
normally open switch
for contact closure
■ Available sensitivity range
6-10 AT
■ Excellent for switching
microcontroller logic level
loads
■ Capable of switching 170 Vdc
or 0.25A up to 10W
■ Very low space requirement
■ Hermetically sealed switch
contacts are not effected by
and have no effect on their
external environment
Additional Information
Applications
■
Position Sensing
■ Security
Resources
Accessories
Samples
■ Level Sensing
■ Office Equipment
■ Meter Equipment
Agency Approvals
Switch Type
Agency
Agency File Number
Ampere-Turns Range
Contact Form
Materials
A (SPST-NO)
E47258
E471070
Body: Glass
Leads: Tin-plated Ni-Fe wire
6 - 20AT
Note: Contact Littelfuse for specific agency approval ratings.
Note: SPST-NO = Single-pole, single-throw, normally open
Electrical Ratings
Contact Rating 1
Voltage 3
W/VA - max.
10
Vdc - max.
Vac - max.
Vdc - min.
170
120
175
Switching 2
Breakdown 4
Adc - max.
Aac - max.
Adc - max.
0.25
0.18
0.50
Switching 2
Carry
Current 3
Contact, Initial
Insulation
Ω - max.
Ω - min.
0.150
1012
Resistance
Capacitance
Temperature
Contact
pF - typ.
0.3
Operating
Storage 5
°C
°C
-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.
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
1
Revised: GD.07/12/21