MDSR-7 Datasheet, PDF (1/2 Pages) HAMLIN Position and Movement Sensor Solutions – Sub-miniature normally open switch with 12.7mm x 1.8mm

Axial Lead Reed Switches
Low Power > MDSR-7
MDSR-7 12.7mm Sub-miniature Reed Switch
RoHS
Description
The MDSR-7 Reed Switch is a sub-miniature, normally open switch with a
12.70mm long x 1.80mm diameter (0.500” x 0.071”) glass envelope, capable of
switching 200Vdc at 10W. It has high insulation resistance of 10¹² ohms
minimum and low contact resistance of less than 100 milli-ohms.
Agency Approvals
Agency
Agency File Number Ampere-Turns Range
E47258
E471070
10-25 AT
DEMKO 14 ATEX 1393U
10-25 AT
Dimensions
Dimensions in mm (inch)
CL OF OVERLAP
20.19
(.795) REF.
1.80
(.071) MAX.
0.47
(0.185) DIA. REF.
13.46
(.530) MIN.
12.70
(.500) MAX.
40.38
(1.590) NOM.
Features
• Sub-miniature normally open
switch
• Capable of switching 200V or 0.5A
at up to 10W
• Available sensitivity range
10-25 AT
Benefits
• Hermetically sealed switch
contacts are not affected by and
have no effect on their external
environment
• Low, stable contact resistance
Applications
• Reed Relays (particularly suited
to ATE type applications)
• Security Systems
• Zero operating power required
for contact
• Excellent for switching micro-
controller logic level loads
• Limit Switching
• Office Equipment
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
Electrical Ratings
Contact Rating ¹
Voltage ³
Current ³
Resistance
Switching ²
Breakdown ⁴
Switching ²
Carry
Contact, Initial
Insulation
W/VA - max.
Vdc - max.
Vac - max.
Vdc - min.
Adc - max.
Aac - max.
Adc - max.
Ω - max.
Ω - min.
10
200
140
250
0.5
0.35
0.80
0.100
10¹²
Capacitance
Temperature
Contact
Operating
Storage ⁵
pF - typ.
°C
°C
0.3
-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
Revised: 10/09/15
Specifications are subject to change without notice.
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