| PartNumber | 66527-020LF | 66527-021LF | 66527-020 |
| Description | Headers & Wire Housings GUIDE PIN CARD CONNECTOR | Headers & Wire Housings 42P HORIZ RECPT THROUGH MOUNT | Headers & Wire Housings HORZ CARD CONN DR100 |
| Manufacturer | FCI / Amphenol | FCI / Amphenol | FCI / Amphenol |
| Product Category | Headers & Wire Housings | Headers & Wire Housings | Headers & Wire Housings |
| Product | Headers | Headers | - |
| Type | Socket | Socket | - |
| Number of Positions | 40 Position | 42 Position | 40 Position |
| Pitch | 2.54 mm | 2.54 mm | 2.54 mm |
| Number of Rows | 2 Row | 2 Row | 2 Row |
| Mounting Style | Straight Pin | Straight Pin | - |
| Termination Style | Through Hole | Through Hole | - |
| Mounting Angle | Right Angle | Right Angle | Right Angle |
| Contact Gender | Socket (Female) | Socket (Female) | - |
| Contact Plating | Gold | Gold | Gold |
| Termination Post Length | 2.92 mm | 2.92 mm | - |
| Series | BergStik | BergStik | BergStik |
| Tradename | BergStik | BergStik | BergStik |
| Packaging | Tube | - | Tube |
| Contact Type | - | - | - |
| Current Rating | 3 A | 3 A | - |
| Housing Material | Nylon | Nylon | Nylon |
| Brand | Amphenol FCI | Amphenol FCI | Amphenol FCI |
| Contact Material | Brass | Brass | Copper Alloy |
| Flammability Rating | UL 94 V-0 | UL 94 V-0 | - |
| Row Spacing | 2.54 mm | 2.54 mm | - |
| Housing Gender | - | - | - |
| Product Type | Headers & Wire Housings | Headers & Wire Housings | Headers & Wire Housings |
| Factory Pack Quantity | 10 | 100 | 10 |
| Subcategory | Headers & Wire Housings | Headers & Wire Housings | Headers & Wire Housings |
| Part # Aliases | 66527020LF | 66527021LF | 66527020 |
| RoHS | - | Y | N |
| Compliance | - | - | UL, CSA |