40-pin round hole IC DIP socket — 2.54mm pitch, machined contacts, through-hole
The 40-pin round hole IC DIP socket is a precision machined contact socket designed for reliable, low-insertion-force mounting of 40-pin DIP (Dual In-line Package) integrated circuits on PCBs. Unlike standard stamped-contact sockets, the round (machined) contacts grip the IC pins with a circular contact surface, providing superior electrical contact, lower contact resistance, and significantly reduced risk of pin damage during insertion and removal.
With a 2.54mm (0.1") standard pitch and through-hole PCB mounting, it is compatible with all standard 40-pin DIP ICs including microcontrollers, memory chips, and logic ICs. Ideal for prototyping, development boards, and any application where ICs need to be swapped or replaced without soldering.
Key Specifications:
- Number of pins: 40 (20 per row)
- Pitch: 2.54mm (0.1")
- Row spacing: 15.24mm (600 mil / 0.6")
- Contact type: Round hole (machined / turned pin)
- Contact material: Copper alloy, gold or tin plated
- Body material: PA66 (nylon), UL94 V-0 flame retardant
- Mounting: Through-hole PCB
- Compatible IC packages: DIP-40 (0.6" wide)
Key Features:
- Machined round contacts — 360° contact surface for superior grip, lower resistance, and longer service life vs. stamped contacts
- Low insertion force — IC pins slide in smoothly without bending or damage
- Re-insertable — allows repeated IC swapping without degrading contact quality
- Standard 2.54mm pitch — fits all standard DIP-40 footprints
- Flame-retardant housing for safety in enclosed electronics
Compatible ICs (examples):
- ATmega16 / ATmega32 microcontrollers
- Z80 CPU
- 8051 / AT89S52 microcontrollers
- 27C256 / 27C512 EPROM memory
- 6502 CPU and other vintage 40-pin DIP processors
Applications:
- Microcontroller development and prototyping boards
- EPROM and memory programming sockets
- IC testing and evaluation fixtures
- Educational electronics kits
- Repair and replacement of socketed ICs