INFORMATION PROVIDED ON THIS DATA SHEET IS PROVIDED FOR INFORMATION PURPOSES ONLY AND SHOULD NOT BE RELIED UPON AS BEING ACCURATE FOR ANY
PARTICULAR PURPOSE. Product performance may be affected by the application to which the product is applied. Upon request, HAMLIN will assist purchasers by providing information
specific to any particular application. HAMLIN disclaims any and all liability whatsoever for any purchaser’s reliance upon the information contained on this data sheet without further
consultation with authorised representatives of HAMLIN.
www.hamlin.com
MDSR-7 Features and Benefits
DIMENSIONS (in) mm
Notes 1) For details on electrical specifications, contact Hamlin.
2) Contact rating-Product of the switching voltage and current should never exceed the
wattage rating.
Contact Hamlin for additional load/life information.
3) Operate (inc. bounce) /Release Time-per EIA/NARM RS421A, diode suppressed coil.
4) Pull in Range-Contact Hamlin for tolerances available within this range.
5) Rating Sensitivity-The value at which contact ratings and operating characteristics are
determined. Derating may be required below this value.
6) Storage Temperature-Long time exposure at elevated temperature may degrade
solderability of the leads.
Switch Type MDSR-7
Contact Form A
Underwriters Laboratories Recognised, File E47258 (see note 1)
ELECTRICAL RATINGS
Contact Rating (2) Watt - max. 10
Voltage Switching Vdc - max. 200
Breakdown Vdc - min. 250
Current Switching A - max. 0.5
Carry A - max. 0.8
Resistance Contact, Initial Ω- max. 0.100
Insulation Ω- min. 1012
Capacitance Contact pF - typ. 0.3
Temperature Operating °C -40 to +125
Storage (6) °C -65 to +125
OPERATING CHARACTERISTICS
Operate Time (3) ms - max. 0.6
Release Time (3) ms - max. 0.2
Shock 11ms 1⁄2sine wave G - max. 100
Vibration 50-2000 Hertz G - max. 30
Resonant Frequency Hz - typ. 5500
MAGNETIC CHARACTERISTICS
Pull-In Range (4) Ampere Turns 10-25
Rating Sensitivity (5) Ampere Turns 20
Test Coil L4989
Features
•Sub-miniature normally open
switch with 12.7mm x 1.8mm
(0.500” x 0.071”) glass envelope
•Capable of switching 200Vdc at
up to 10 Watts
•1012 Ohms insulation resistance
•Available sensitivity range
10-25 AT
•Surface mount version available
Benefits
•Hermetically sealed switch contacts
are not effected by and have no
effect on their external environment
•Low, stable contact resistance
•Low space requirement
•Zero operating power required
for contact
•Fit and forget durability
•Well suited to signal switching
applications
Applications
•Reed relays (particularly suited
to ATE type applications)
•Security
•Limit switching
•Telephone hook switch
Hamlin USA Tel: +1 920 648 3000 •Fax: +1 920 648 3001 •Email: sales.us@hamlin.com
Hamlin UK Tel: +44 (0)1379 649700 •Fax: +44 (0)1379 649702 •Email: sales.uk@hamlin.com
Hamlin Germany Tel: +49 (0) 6181 953660 •Fax: +49 (0) 6181 9536666 •Email: sales.de@hamlin.com
Hamectrol France Tel: +33 (0) 1 6047 3000 • Fax: +33 (0) 1 6015 9136 • Email: sales.fr@hamlin.com
ISSUE No: 4 DATE: 1/5/3
