M55302/166A22Y1

BACKPLANE PC BOARD CONNECTORS

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
Manufacturer: AMPHENOL / PARTNER STOCK
Product type:
SVHC: To Be Advised
Delivery and price
Units per pack	3
Price	167.22 €
Current stock	10+
Lead time	30 days
Datasheet
## mother board connector 

## **MATES WITH DB AND I/O SERIES CONNECTORS** 

Notes: 

**==> picture [503 x 120] intentionally omitted <==**

**----- Start of picture text -----**<br>
Contact Data<br>When mating with DB connector, a total of .035 inch minimum radial<br>pilot is available for connector body alignment. Termination Contact H J K<br>Description Style Part<br>All dimensions for reference only. ±.020 ±.020 ±.002<br>Letter Number<br>Polarization keys are not supplied as part of MB Connector Series<br>assemblies. See How to Order, page 7 and further description, page Round PCB P 10-502403-11 .148 .113 .021 Dia.<br>28. Stud Solder P-(702) 10-502403-21 .180 .145 .021 Dia.<br>** Termination P-(709) 10-502403-31 .335 .300 .021 Dia.<br>Not supplied as part of MB Connector Series assemblies.<br>See How to Order, page 7. Square Solder- W 10-502406-11 .542 .507 .025 Sq.<br>less Wrap<br>Designates Basic Dimension Termination W-(710) 10-502406-21 .700 .665 .025 Sq.<br>Consult Amphenol drawing for solderless wrap contact fixturing ===<br>(datum) hole locations to facilitate connector alignment. NOTE: Other variations available - see pages 7 and 8, or consult Sidney, NY.<br>**----- End of picture text -----**<br>


12 

## ���������������� mother board connector 2 row contact arrangements 

|Number<br>of<br>Contacts|MB<br>Number*|A<br>Max.|B|C<br>Max.|G<br>Min.||Number<br>of<br>Contacts|MB<br>Number*|A<br>Max.|B|C<br>Max.|G<br>Min.|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|020|MB2-020(*)|2.295|1.975|.390|1.040||112|MB2-112(*)|6.895|6.575|.390|5.640|
|022|MB2-022(*)|2.395|2.075|.390|1.140||114|MB2-114(*)|6.995|6.675|.390|5.740|
|024|MB2-024(*)|2.495|2.175|.390|1.240||116|MB2-116(*)|7.095|6.775|.390|5.840|
|026|MB2-026(*)|2.595|2.275|.390|1.340||118|MB2-118(*)|7.195|6.875|.390|5.940|
|028|MB2-028(*)|2.695|2.375|.390|1.440||120|MB2-120(*)|7.295|6.975|.390|6.040|
|030|MB2-030(*)|2.795|2.475|.390|1.540||122|MB2-122(*)|7.395|7.075|.390|6.140|
|032|MB2-032(*)|2.895|2.575|.390|1.640||124|MB2-124(*)|7.495|7.175|.390|6.240|
|034|MB2-034(*)|2.995|2.675|.390|1.740||126|MB2-126(*)|7.595|7.275|.390|6.340|
|036|MB2-036(*)|3.095|2.775|.390|1.840||128|MB2-128(*)|7.695|7.375|.390|6.440|
|038|MB2-038(*)|3.195|2.875|.390|1.940||130|MB2-130(*)|7.795|7.475|.390|6.540|
|040|MB2-040(*)|3.295|2.975|.390|2.040||132|MB2-132(*)|7.895|7.575|.390|6.640|
|042|MB2-042(*)|3.395|3.075|.390|2.140||134|MB2-134(*)|7.995|7.675|.390|6.740|
|044|MB2-044(*)|3.495|3.175|.390|2.240||136|MB2-136(*)|8.095|7.775|.390|6.840|
|046|MB2-046(*)|3.595|3.275|.390|2.340||138|MB2-138(*)|8.195|7.875|.390|6.940|
|048|MB2-048(*)|3.695|3.375|.390|2.440||140|MB2-140(*)|8.295|7.975|.390|7.040|
|050|MB2-050(*)|3.795|3.475|.390|2.540||142|MB2-142(*)|8.395|8.075|.390|7.140|
|052|MB2-052(*)|3.895|3.575|.390|2.640||144|MB2-144(*)|8.495|8.175|.390|7.240|
|054|MB2-054(*)|3.995|3.675|.390|2.740||146|MB2-146(*)|8.595|8.275|.390|7.340|
|056|MB2-056(*)|4.095|3.775|.390|2.840||148|MB2-148(*)|8.695|8.375|.390|7.440|
|058|MB2-058(*)|4.195|3.875|.390|2.940||150|MB2-150(*)|8.795|8.475|.390|7.540|
|060|MB2-060(*)|4.295|3.975|.390|3.040||152|MB2-152(*)|8.895|8.575|.390|7.640|
|062|MB2-062(*)|4.395|4.075|.390|3.140||154|MB2-154(*)|8.995|8.675|.390|7.740|
|064|MB2-064(*)|4.495|4.175|.390|3.240||156|MB2-156(*)|9.095|8.775|.390|7.840|
|066|MB2-066(*)|4.595|4.275|.390|3.340||158|MB2-158(*)|9.195|8.875|.390|7.940|
|068|MB2-068(*)|4.695|4.375|.390|3.440||160|MB2-160(*)|9.295|8.975|.390|8.040|
|070|MB2-070(*)|4.795|4.475|.390|3.540||162|MB2-162(*)|9.395|9.075|.390|8.140|
|072|MB2-072(*)|4.895|4.575|.390|3.640||164|MB2-164(*)|9.495|9.175|.390|8.240|
|074|MB2-074(*)|4.995|4.675|.390|3.740||166|MB2-166(*)|9.595|9.275|.390|8.340|
|076|MB2-076(*)|5.095|4.775|.390|3.840||168|MB2-168(*)|9.695|9.375|.390|8.440|
|078|MB2-078(*)|5.195|4.875|.390|3.940||170|MB2-170(*)|9.795|9.475|.390|8.540|
|080|MB2-080(*)|5.295|4.975|.390|4.040||172|MB2-172(*)|9.895|9.575|.390|8.640|
|082|MB2-082(*)|5.395|5.075|.390|4.140||174|MB2-174(*)|9.995|9.675|.390|8.740|
|084|MB2-084(*)|5.495|5.175|.390|4.240||176|MB2-176(*)|10.095|9.775|.390|8.840|
|086|MB2-086(*)|5.595|5.275|.390|4.340||178|MB2-178(*)|10.195|9.875|.390|8.940|
|088|MB2-088(*)|5.695|5.375|.390|4.440||180|MB2-180(*)|10.295|9.975|.390|9.040|
|090|MB2-090(*)|5.795|5.475|.390|4.540||182|MB2-182(*)|10.395|10.075|.390|9.140|
|092|MB2-092(*)|5.895|5.575|.390|4.640||184|MB2-184(*)|10.495|10.175|.390|9.240|
|094|MB2-094(*)|5.995|5.675|.390|4.740||186|MB2-186(*)|10.595|10.275|.390|9.340|
|096|MB2-096(*)|6.095|5.775|.390|4.840||188|MB2-188(*)|10.695|10.375|.390|9.440|
|098|MB2-098(*)|6.195|5.875|.390|4.940||190|MB2-190(*)|10.795|10.475|.390|9.540|
|100|MB2-100(*)|6.295|5.975|.390|5.040||192|MB2-192(*)|10.895|10.575|.390|9.640|
|102|MB2-102(*)|6.395|6.075|.390|5.140||194|MB2-194(*)|10.995|10.675|.390|9.740|
|104|MB2-104(*)|6.495|6.175|.390|5.240||196|MB2-196(*)|11.095|10.775|.390|9.840|
|106|MB2-106(*)|6.595|6.275|.390|5.340||198|MB2-198(*)|11.195|10.875|.390|9.940|
|108|MB2-108(*)|6.695|6.375|.390|5.440||200|MB2-200(*)|11.295|10.975|.390|10.040|
|110|MB2-110(*)|6.795|6.475|.390|5.540||*See How to Order, pages 5, 6 and 7||||||



*See How to Order, pages 5, 6 and 7 

13 

## ���������������� mother board connector 3 row contact arrangements 

|Number<br>of<br>Contacts|MB<br>Number*|A<br>Max.|B|C<br>Max.|G<br>Min.|
|---|---|---|---|---|---|
|030|MB3-030(*)|2.295|1.975|.490|1.040|
|033|MB3-033(*)|2.395|2.075|.490|1.140|
|036|MB3-036(*)|2.495|2.175|.490|1.240|
|039|MB3-039(*)|2.595|2.275|.490|1.340|
|042|MB3-042(*)|2.695|2.375|.490|1.440|
|045|MB3-045(*)|2.795|2.475|.490|1.540|
|048|MB3-048(*)|2.895|2.575|.490|1.640|
|051|MB3-051(*)|2.995|2.675|.490|1.740|
|054|MB3-054(*)|3.095|2.775|.490|1.840|
|057|MB3-057(*)|3.195|2.875|.490|1.940|
|060|MB3-060(*)|3.295|2.975|.490|2.040|
|063|MB3-063(*)|3.395|3.075|.490|2.140|
|066|MB3-066(*)|3.495|3.175|.490|2.240|
|069|MB3-069(*)|3.595|3.275|.490|2.340|
|072|MB3-072(*)|3.695|3.375|.490|2.440|
|075|MB3-075(*)|3.795|3.475|.490|2.540|
|078|MB3-078(*)|3.895|3.575|.490|2.640|
|081|MB3-081(*)|3.995|3.675|.490|2.740|
|084|MB3-084(*)|4.095|3.775|.490|2.840|
|087|MB3-087(*)|4.195|3.875|.490|2.940|
|090|MB3-090(*)|4.295|3.975|.490|3.040|
|093|MB3-093(*)|4.395|4.075|.490|3.140|
|096|MB3-096(*)|4.495|4.175|.490|3.240|
|099|MB3-099(*)|4.595|4.275|.490|3.340|
|102|MB3-102(*)|4.695|4.375|.490|3.440|
|105|MB3-105(*)|4.795|4.475|.490|3.540|
|108|MB3-108(*)|4.895|4.575|.490|3.640|
|111|MB3-111(*)|4.995|4.675|.490|3.740|
|114|MB3-114(*)|5.095|4.775|.490|3.840|
|117|MB3-117(*)|5.195|4.875|.490|3.940|
|120|MB3-120(*)|5.295|4.975|.490|4.040|
|123|MB3-123(*)|5.395|5.075|.490|4.140|
|126|MB3-126(*)|5.495|5.175|.490|4.240|
|129|MB3-129(*)|5.595|5.275|.490|4.340|
|132|MB3-132(*)|5.695|5.375|.490|4.440|
|135|MB3-135(*)|5.795|5.475|.490|4.540|
|138|MB3-138(*)|5.895|5.575|.490|4.640|
|141|MB3-141(*)|5.995|5.675|.490|4.740|
|144|MB3-144(*)|6.095|5.775|.490|4.840|
|147|MB3-147(*)|6.195|5.875|.490|4.940|
|150|MB3-150(*)|6.295|5.975|.490|5.040|
|153|MB3-153(*)|6.395|6.075|.490|5.140|
|156|MB3-156(*)|6.495|6.175|.490|5.240|
|159|MB3-159(*)|6.595|6.275|.490|5.340|
|162|MB3-162(*)|6.695|6.375|.490|5.440|
|165|MB3-165(*)|6.795|6.475|.490|5.540|



|Number<br>of<br>Contacts|MB<br>Number*|A<br>Max.|B|C<br>Max.|G<br>Min.|
|---|---|---|---|---|---|
|168|MB3-168(*)|6.895|6.575|.490|5.640|
|171|MB3-171(*)|6.995|6.675|.490|5.740|
|174|MB3-174(*)|7.095|6.775|.490|5.840|
|177|MB3-177(*)|7.195|6.875|.490|5.940|
|180|MB3-180(*)|7.295|6.975|.490|6.040|
|183|MB3-183(*)|7.395|7.075|.490|6.140|
|186|MB3-186(*)|7.495|7.175|.490|6.240|
|189|MB3-189(*)|7.595|7.275|.490|6.340|
|192|MB3-192(*)|7.695|7.375|.490|6.440|
|195|MB3-195(*)|7.795|7.475|.490|6.540|
|198|MB3-198(*)|7.895|7.575|.490|6.640|
|201|MB3-201(*)|7.995|7.675|.490|6.740|
|204|MB3-204(*)|8.095|7.775|.490|6.840|
|207|MB3-207(*)|8.195|7.875|.490|6.940|
|210|MB3-210(*)|8.295|7.975|.490|7.040|
|213|MB3-213(*)|8.395|8.075|.490|7.140|
|216|MB3-216(*)|8.495|8.175|.490|7.240|
|219|MB3-219(*)|8.595|8.275|.490|7.340|
|222|MB3-222(*)|8.695|8.375|.490|7.440|
|225|MB3-225(*)|8.795|8.475|.490|7.540|
|228|MB3-228(*)|8.895|8.575|.490|7.640|
|231|MB3-231(*)|8.995|8.675|.490|7.740|
|234|MB3-234(*)|9.095|8.775|.490|7.840|
|237|MB3-237(*)|9.195|8.875|.490|7.940|
|240|MB3-240(*)|9.295|8.975|.490|8.040|
|243|MB3-243(*)|9.395|9.075|.490|8.140|
|246|MB3-246(*)|9.495|9.175|.490|8.240|
|249|MB3-249(*)|9.595|9.275|.490|8.340|
|252|MB3-252(*)|9.695|9.375|.490|8.440|
|255|MB3-255(*)|9.795|9.475|.490|8.540|
|258|MB3-258(*)|9.895|9.575|.490|8.640|
|261|MB3-261(*)|9.995|9.675|.490|8.740|
|264|MB3-264(*)|10.095|9.775|.490|8.840|
|267|MB3-267(*)|10.195|9.875|.490|8.940|
|270|MB3-270(*)|10.295|9.975|.490|9.040|
|273|MB3-273(*)|10.395|10.075|.490|9.140|
|276|MB3-276(*)|10.495|10.175|.490|9.240|
|279|MB3-279(*)|10.595|10.275|.490|9.340|
|282|MB3-282(*)|10.695|10.375|.490|9.440|
|285|MB3-285(*)|10.795|10.475|.490|9.540|
|288|MB3-288(*)|10.895|10.575|.490|9.640|
|291|MB3-291(*)|10.995|10.675|.490|9.740|
|294|MB3-294(*)|11.095|10.775|.490|9.840|
|297|MB3-297(*)|11.195|10.875|.490|9.940|
|300|MB3-300(*)|11.295|10.975|.490|10.040|



*See How to Order, pages 5, 6 and 7 

14 

## ���������������� mother board connector 4 row contact arrangements 

|Number<br>of<br>Contacts|MB<br>Number*|A<br>Max.|B|C<br>Max.|G<br>Min.||Number<br>of<br>Contacts|MB<br>Number*|A<br>Max.|B|C<br>Max.|G<br>Min.|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|040|MB4-040(*)|2.295|1.975|.590|1.040||224|MB4-224(*)|6.895|6.575|.590|5.640|
|044|MB4-044(*)|2.395|2.075|.590|1.140||228|MB4-228(*)|6.995|6.675|.590|5.740|
|048|MB4-048(*)|2.495|2.175|.590|1.240||232|MB4-232(*)|7.095|6.775|.590|5.840|
|052|MB4-052(*)|2.595|2.275|.590|1.340||236|MB4-236(*)|7.195|6.875|.590|5.940|
|056|MB4-056(*)|2.695|2.375|.590|1.440||240|MB4-240(*)|7.295|6.975|.590|6.040|
|060|MB4-060(*)|2.795|2.475|.590|1.540||244|MB4-244(*)|7.395|7.075|.590|6.140|
|064|MB4-064(*)|2.895|2.575|.590|1.640||248|MB4-248(*)|7.495|7.175|.590|6.240|
|068|MB4-068(*)|2.995|2.675|.590|1.740||252|MB4-252(*)|7.595|7.275|.590|6.340|
|072|MB4-072(*)|3.095|2.775|.590|1.840||256|MB4-256(*)|7.695|7.375|.590|6.440|
|076|MB4-076(*)|3.195|2.875|.590|1.940||260|MB4-260(*)|7.795|7.475|.590|6.540|
|080|MB4-080(*)|3.295|2.975|.590|2.040||264|MB4-264(*)|7.895|7.575|.590|6.640|
|084|MB4-084(*)|3.395|3.075|.590|2.140||268|MB4-268(*)|7.995|7.675|.590|6.740|
|088|MB4-088(*)|3.495|3.175|.590|2.240||272|MB4-272(*)|8.095|7.775|.590|6.840|
|092|MB4-092(*)|3.595|3.275|.590|2.340||276|MB4-276(*)|8.195|7.875|.590|6.940|
|096|MB4-096(*)|3.695|3.375|.590|2.440||280|MB4-280(*)|8.295|7.975|.590|7.040|
|100|MB4-100(*)|3.795|3.475|.590|2.540||284|MB4-284(*)|8.395|8.075|.590|7.140|
|104|MB4-104(*)|3.895|3.575|.590|2.640||288|MB4-288(*)|8.495|8.175|.590|7.240|
|108|MB4-108(*)|3.995|3.675|.590|2.740||292|MB4-292(*)|8.595|8.275|.590|7.340|
|112|MB4-112(*)|4.095|3.775|.590|2.840||296|MB4-296(*)|8.695|8.375|.590|7.440|
|116|MB4-116(*)|4.195|3.875|.590|2.940||300|MB4-300(*)|8.795|8.475|.590|7.540|
|120|MB4-120(*)|4.295|3.975|.590|3.040||304|MB4-304(*)|8.895|8.575|.590|7.640|
|124|MB4-124(*)|4.395|4.075|.590|3.140||308|MB4-308(*)|8.995|8.675|.590|7.740|
|128|MB4-128(*)|4.495|4.175|.590|3.240||312|MB4-312(*)|9.095|8.775|.590|7.840|
|132|MB4-132(*)|4.595|4.275|.590|3.340||316|MB4-316(*)|9.195|8.875|.590|7.940|
|136|MB4-136(*)|4.695|4.375|.590|3.440||320|MB4-320(*)|9.295|8.975|.590|8.040|
|140|MB4-140(*)|4.795|4.475|.590|3.540||324|MB4-324(*)|9.395|9.075|.590|8.140|
|144|MB4-144(*)|4.895|4.575|.590|3.640||328|MB4-328(*)|9.495|9.175|.590|8.240|
|148|MB4-148(*)|4.995|4.675|.590|3.740||332|MB4-332(*)|9.595|9.275|.590|8.340|
|152|MB4-152(*)|5.095|4.775|.590|3.840||336|MB4-336(*)|9.695|9.375|.590|8.440|
|156|MB4-156(*)|5.195|4.875|.590|3.940||340|MB4-340(*)|9.795|9.475|.590|8.540|
|160|MB4-160(*)|5.295|4.975|.590|4.040||344|MB4-344(*)|9.895|9.575|.590|8.640|
|164|MB4-164(*)|5.395|5.075|.590|4.140||348|MB4-348(*)|9.995|9.675|.590|8.740|
|168|MB4-168(*)|5.495|5.175|.590|4.240||352|MB4-352(*)|10.095|9.775|.590|8.840|
|172|MB4-172(*)|5.595|5.275|.590|4.340||356|MB4-356(*)|10.195|9.875|.590|8.940|
|176|MB4-176(*)|5.695|5.375|.590|4.440||360|MB4-360(*)|10.295|9.975|.590|9.040|
|180|MB4-180(*)|5.795|5.475|.590|4.540||364|MB4-364(*)|10.395|10.075|.590|9.140|
|184|MB4-184(*)|5.895|5.575|.590|4.640||368|MB4-368(*)|10.495|10.175|.590|9.240|
|188|MB4-188(*)|5.995|5.675|.590|4.740||372|MB4-372(*)|10.595|10.275|.590|9.340|
|192|MB4-192(*)|6.095|5.775|.590|4.840||376|MB4-376(*)|10.695|10.375|.590|9.440|
|196|MB4-196(*)|6.195|5.875|.590|4.940||380|MB4-380(*)|10.795|10.475|.590|9.540|
|200|MB4-200(*)|6.295|5.975|.590|5.040||384|MB4-384(*)|10.895|10.575|.590|9.640|
|204|MB4-204(*)|6.395|6.075|.590|5.140||388|MB4-388(*)|10.995|10.675|.590|9.740|
|208|MB4-208(*)|6.495|6.175|.590|5.240||392|MB4-392(*)|11.095|10.775|.590|9.840|
|212|MB4-212(*)|6.595|6.275|.590|5.340||396|MB4-396(*)|11.195|10.875|.590|9.940|
|216|MB4-216(*)|6.695|6.375|.590|5.440||400|MB4-400(*)|11.295|10.975|.590|10.040|
|220|MB4-220(*)|6.795|6.475|.590|5.540||*See How to Order, pages 5, 6 and 7||||||



*See How to Order, pages 5, 6 and 7 

15
Updated at June 9, 2026
About Novapart

Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.
Learn more →
Stock Shortage Specialist

When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
Request a quote →
Compliant Alternatives

We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →