HDM® Stacker Operating Characteristics

Materials and Finishes | Electrical | Mechanical

Materials and Finishes

Contacts: HDM® Stacker

Signal pins - Copper alloy per C51000 a.    Finish - 50µ" nickel minimum all over, 30µ" gold minimum selective in mating area, 3µ" gold flash minimum on remainder b.    Finish - 50 µ" nickel minimum selective, 30µ" gold minimum selective in mating, 50µ" 60/40 Sn/Pb, selective on tails.

Signal contacts - Copper alloy per C72500 Finish - 50µ" minimum nickel all over and 30µ" minimum gold selective in mating area. 15-60µ" Sn/Pb on solder tails.

Power Blades - Copper alloy per C11000 Finish - 50µ" minimum nickel all 30µ" minimum gold selective in mating area. 100-300µ" Sn/Pb on solder tails.

Power Contacts - Cooper alloy per C17510 Finish - 50µ" nickel all over and 30µ" minimum gold selective in mating area. 3m" minimum gold flash on remainder.

Insulators:

Glass reinforced polyester (liquid crystal polymer) UL 94 V-O rating: color black.

Guide Pins:

Stainless steel, corrosion resistant per QQ-S-764, CL 303 or 303 SE condition A.

Electrical

Mated Signal Contact Bulk Resistance (daughtercard mated to backplane module)
A Row	13 milliohm maximum
B Row	18 milliohm maximum
C Row	20 milliohm maximum
D Row	25 milliohm maximum
E Row	30 milliohm maximum
F Row	32 milliohm maximum

Contact-to-plated through hole resistance:	2 milliohm maximum
Power blade contact resistance (bulk):	3 milliohm maximum
Insulation resistance:	5,000 Megaohm minimum
Dielectric withstanding voltage (unshielded):	1,000 V RMS
Dielectric withstanding voltage (shielded):	500 V RMS
Signal contact current rating:	1 Amp
Power contact current rating:	15 Amp

Mechanical

Separable Interface: HDM Stacker
Signal contact normal force:	0.5N (51 grams) minimum per beam, end of life
Power contact normal force:	1N (102 grams) minimum per beam, end of life
Signal contact engagement force:	0.45N (45.9 grams) minimum per contact
Contact separation force:	0.15N (15 grams) per contact minimum
Housing retention force:	4.5N (459 grams) minimum
Contact life (durability):	250 cycles
Contact wipe length:	1.75mm (signal) 3.75mm (power)

Compliant Pin Interface: HDM Stacker
Signal contact retention force:	22N (5 lbs) minimum per pin, backplane
Signal contact retention force:	4.4N (1 lbs) minimum per pin, daughtercard/stacker
Compliant pin insertion force:	135N (30.3 lbs) maximum

Environmental: HDM Stacker
Operating temperature range:	-55° C to +105° C
Salt spray	Per MIL-STD-1344, method 101D