UM-5 Crystal

BC25 - 6 x 7.8 x 3.25mm

The UM-5 Crystal is a miniature AT-cut thru hole type crystal, designed for use in applications where space is limited. The UM-5 offers tolerance and stability to ±5ppm and a temperature range to -40o to +85oC.  The UM-5 is available with an optional gullwing design and mounting clip for SMD applications.  Available in fundamental, third overtone, fifth overtone or seventh overtone.


  • Very compact and thin (6.0 x 7.8 x 3.25mm)
  • Frequency range from 10.000 MHz to 200.000 MHz
  • Perfect for Mobile Communication and Radio Applications
  • High precision and high reliability
  • All Products meet the European Union Initiative (RoHS) for Lead (Pb) free content and requirements for re-flow profiling using lead-free solder.


Frequency Range 10.000 - 200.000 MHz
Frequency Tolerance at 25ºC. ±30ppm - Standard
±5ppm to ±100ppm - Available
Temperature Range
-20o to +70oC. - Standard
-40o to +85oC. - Available
Frequency Stability ±50ppm - Standard
±5ppm to ±100ppm - Available
Load Capacitance 10pF to 100pF or Series Resonant
Shunt Capacitance 7pF max.
Resistance See Below
Aging ±3ppm/1st year max.
Drive Level 1mW max.

Contact Us

Bomar Crystal Company
117 William St.
PO Box 10
Middlesex, NJ 08846
+ 1 (732) 356-7787



UM-1 crystal

Equivalent Series Resistance (ESR) ohms max.

Frequency Mode ESR(ohms)max.
10.000-15.999 Fundamental 60
16.000-60.000 Fundamental 40
30.000-100.000 Third Overtone 60
80.000-155.000  Fifth Overtone   80
120.000-200.000  Seventh Overtone   120