Specification	518-77-256M20-001105

Contact Finish - Mating	Gold
Contact Finish - Post	Gold
Contact Finish Thickness - Mating	Flash
Contact Finish Thickness - Post	Flash
Contact Finish Thickness - Post (string_set)	Flash
Contact Material - Mating	Beryllium Copper
Contact Material - Post	Brass
Contact Resistance	10 mOhm
Current Rating	1 A
Features	Open Frame
Grid Columns	20
Grid Rows	20
Housing Material	FR4 Epoxy Glass
Material Flammability Rating	UL94 V-0
Mounting Type	Through Hole
Number of Positions or Pins (Grid)	256
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-55 °C
Pitch - Mating	0.05 in
Pitch - Post	0.05 in
Termination	Solder
Termination Post Length	0.11 in
Type	PGA

518-77 Series

Part	Grid Columns	Grid Rows	Number of Positions or Pins (Grid)	Contact Finish Thickness - Post	Contact Finish Thickness - Post (string_set)	Mounting Type	Type	Housing Material	Features	Contact Material - Post	Contact Material - Mating	Termination	Pitch - Post	Operating Temperature (Max)	Operating Temperature (Min)	Contact Finish - Post	Contact Finish - Mating	Contact Finish Thickness - Mating	Pitch - Mating	Current Rating	Contact Resistance	Material Flammability Rating	Termination Post Length
Preci-Dip 518-77-400M20-000105	20	20	400	Flash	Flash	Through Hole	PGA	FR4 Epoxy Glass	Closed Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.11 in
Preci-Dip 518-77-357M19-001105	19	19	357	Flash	Flash	Through Hole	PGA	FR4 Epoxy Glass	Open Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.11 in
Preci-Dip 518-77-400M20-000106	20	20	400	Flash	Flash	Surface Mount	PGA	FR4 Epoxy Glass	Closed Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.062 in
Preci-Dip 518-77-520M31-001105	31	31	520	Flash	Flash	Through Hole	PGA	FR4 Epoxy Glass	Open Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.11 in
Preci-Dip 518-77-652M35-001106	35	35	652	Flash	Flash	Surface Mount	PGA	FR4 Epoxy Glass	Open Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.062 in
Preci-Dip 518-77-255M16-001106	16	16	255	Flash	Flash	Surface Mount	PGA	FR4 Epoxy Glass	Open Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.062 in
Preci-Dip 518-77-480M29-001105	29	29	480	Flash	Flash	Through Hole	PGA	FR4 Epoxy Glass	Open Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.11 in
Preci-Dip 518-77-560M33-001106	33	33	560	Flash	Flash	Surface Mount	PGA	FR4 Epoxy Glass	Open Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.062 in
Preci-Dip 518-77-456M26-001105	26	26	456	Flash	Flash	Through Hole	PGA	FR4 Epoxy Glass	Open Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.11 in
Preci-Dip 518-77-356M26-001105	26	26	356 count	Flash	Flash	Through Hole	PGA	FR4 Epoxy Glass	Open Frame	Brass	Beryllium Copper	Solder	0.05 in	125 °C	-55 °C	Gold	Gold	Flash	0.05 in	1 A	10 mOhm	UL94 V-0	0.11 in

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