KeL-com Product Information

KeL-com ImageThis page is intended as a supplement to the product entry for the KeL-com line of filter products. The tables below contain Product Notes and information on Part Numbering, PCB Layout and Reflow Profile.

KeL-com commercial filters offer enhanced design to manufacturing solutions. The product line is standardized through design and packaging to provide engineers with filters which are ideally suited for high-volume, quick-turnaround commercial/industrial applications, and is featured in Filter Wizard.

KeL-com standard filters achieve typical lumped element performance while utilizing commercial grade components and a manufacturing-friendly open frame, leadless surface mount package.

Electrical performance and mechanical dimensions provided by Filter Wizard.

Filter Characteristics

Center Frequency 10 to 3000 MHz *See Note 1
Filter Type Chebyshev Bandpass *See Note 2
Number of Sections 2 to 6  
Bandwidth 3 to 20% *See Note 3
Attenuation -60 dBc *See Note 4
VSWR 1.5:1 typical  
Operating Temperature -40 to +85°C  
Package Style Open Frame Leadless Surface Mount *See Note 5

*Please refer to important information on the notes page

Product Information

Part Numbering
1. Number of Sections
2. Series
3. Bandpass
4. Package Style-Open Frame Leadless SMD
10 = 0.5" x 0.5"
20 = 1.0" x 0.5"
30 = 1.5" x 0.5"
40 = 1.5" x 0.6"
5. Center Frequency in MHz
6. Supplemental Codes
H = 0.5 dB Bandwidth
U = 1 dB Bandwidth
T = 3 dB Bandwidth
7. Bandwidth in MHz
8. Software Version Number

Outline Drawings

See Filter Wizard for: 

Series 10
0.5" x 0.5"
Open Frame Leadless
Series 20
0.1" x 0.5"
Open Frame Leadless
Series 30
1.5" x 0.5"
Open Frame Leadless
Series 40
1.5" x 0.6"
Open Frame Leadless
Recommended PCB Layout
Typical Reflow Profile
Installation Notes
  • When handling KeL-com products, avoid touching any solderable surface with bare hand or other contaminents as solderability may be reduced.
  • KeL-com filters are made of very durable materials. However, mishandling of the product will damage the device. Avoid forcing the product into place by any means.
  • KeL-com products can be cleaned via solvent based, aqueous, semi-aqueous, and alcohol based systems. Be sure to completely dry the units as any entrapped moisture will cause erroneous electrical performance.
  • A typical reflow profile is provided above. The relative mass of all components should be considered when establishing a reflow procedure. Higher density board populations may take longer to achieve reflow temperatures.
  • All KeL-com filters are assembled using SN96 high temperature solder. K&L recommends that customers use SN60 or SN63 or an equivalent during installation for signal and ground connections.
  • The rate of heating and cooling must be controlled to preclude thermal cracking of the devices. Processes, heating or cooling, should not exceed a rate of 200°C per minute. Spikes must not exceed 100°C maximum for any solder operation. Avoid forced cooling or contact with heat sinks, such as conveyor belts, metal tables or cleaning solutions, before the units reach ambient temperatures.

Product Notes

 Note 1
Center frequencies from 3 to 6 GHz are available by request.
 Note 2
Other filter types such as lowpass, highpass, and notch are available by request.
 Note 3
Bandwidths up to 100% are available by request.
 Note 4
Due to manufacturing variations, please observe these guidelines:
  • Actual attenuation at any given frequency point may vary by +10%.
  • Actual bandwidth may be wider than specified (typically 5 to 10%).
  • Passband insertion loss may exceed given value (10% maximum).
 Note 5
Custom packaging available by request.
 Note 6
Ultimate rejection is guaranteed to -60 dBc out to 3(Fo) or 6 GHz maximum.
 Note 7
The capacity coupled "tank" circuit utilized by the Kel-Com Commercial Filter Selection Program offers the end-user the quickest and most cost-effective solutions. Other circuit structures are available by request to alter skirt selectivity for specific applications.