1.27mm Female Header — 0.05" Pitch Socket Connector for High-Density PCBs
1.27mm Female Header — Precision 0.05" Pitch Socket Connectors for High-Density PCB Stacking & Debug Interfaces
The 1.27mm (0.05") pitch female header is the mating socket connector for 1.27mm pin headers, providing reliable, low-profile board-to-board and wire-to-board connections in high-density PCB designs, JTAG/SWD debug interfaces, compact embedded systems, and professional test equipment. With phosphor bronze contacts and gold flash plating, these female headers deliver consistent low contact resistance and long mating cycle life — critical for debug interfaces that are connected and disconnected repeatedly during development.
Key Technical Specifications
- Pitch: 1.27mm (0.05" / 0.5")
- Contact material: Phosphor bronze, gold flash plated
- Plastic height: PH4.3mm (standard profile)
- Current rating: 1A per contact
- Insulation resistance: ≥1000MΩ (or ≥5000MΩ on select variants)
- Dielectric withstanding voltage: AC 500V
- Operating temperature: –40°C to +105°C
- Dimensional tolerance: ±0.2mm
- Row configuration: Single row (1×N), Double row (2×N)
- Pin count: 2P to 50P (single row); 2×3P to 2×12P (double row)
- Mounting styles: Straight DIP, Right-Angle, Vertical SMT
- Certifications: RoHS
Complete Product Range in This Collection
This collection includes: single-row 1.27mm female headers (1×50P, straight vertical, SMT, and right-angle options), double-row 1.27mm female headers (2×3P to 2×12P, vertical SMT, PH4.3mm plastic height), and breakaway single-row male/female pin header sets (1×40P cuttable to any length). All variants feature gold-flash plated phosphor bronze contacts for superior conductivity and corrosion resistance.
Ideal Applications
- JTAG / SWD debug sockets — mating socket for ARM Cortex debug ribbon cables and probe adapters
- High-density PCB stacking connectors in compact embedded modules
- Daughter board and shield connectors for 1.27mm pitch carrier boards
- Automated test equipment (ATE) probe sockets and bed-of-nails fixtures
- Compact industrial control modules requiring low-profile interconnects
- Wearable and medical device PCBs with strict height constraints
- Ribbon cable termination sockets for 1.27mm flat cable assemblies
1.27mm Female Header Buying Guide
Step 1 — Match to your pin header: 1.27mm female headers mate exclusively with 1.27mm pin headers. Verify the pitch, row count (single/double), and pin count of your existing pin header before ordering the mating socket.
Step 2 — Single row vs double row: Single-row (1×N) sockets are used for GPIO breakouts, power rails, and simple signal connections. Double-row (2×N) sockets are standard for JTAG (2×10P), ISP (2×3P), and ribbon cable IDC interfaces.
Step 3 — Mounting style: Straight DIP sockets are through-hole soldered vertically. SMT (vertical) sockets are reflow-soldered for surface-mount boards. Right-angle sockets allow horizontal mating for edge-accessible connectors.
Step 4 — Plastic height: Our standard female headers have a PH4.3mm plastic body height. Verify clearance requirements on your PCB stack before selecting a variant.
Why Choose Yoeruyo for 1.27mm Female Headers?
Yoeruyo stocks the full 1.27mm female header range — single row up to 50 positions, double row SMT variants, and right-angle options — all with phosphor bronze gold-flash contacts that maintain low contact resistance (≤20mΩ) across thousands of mating cycles. CE and RoHS certified. Available in quantities from 10pcs for prototyping to 100pcs+ for production. Custom pin counts and configurations available on request.
Frequently Asked Questions
Q: Will 1.27mm female headers mate with standard 2.54mm pin headers?
A: No. 1.27mm and 2.54mm pitch connectors are not interchangeable. The 1.27mm female header requires a 1.27mm pitch male pin header. Using mismatched pitches will result in misalignment and potential PCB damage.
Q: What is the maximum current rating for 1.27mm female headers?
A: 1A per contact is the standard rating for 1.27mm pitch connectors. For higher current applications, use multiple contacts in parallel or select a larger pitch connector (2.0mm or 2.54mm).
Q: Are the SMT double-row female headers suitable for automated pick-and-place?
A: Yes. Our SMT double-row 1.27mm female headers are packaged in bags of 100pcs and are compatible with standard pick-and-place equipment. Contact us for tape-and-reel packaging for high-volume production.
Q: Can I use these as JTAG debug sockets on my PCB?
A: Yes. The 2×10P (20-pin) double-row 1.27mm female header is the standard footprint for ARM Cortex JTAG debug sockets. The 2×5P (10-pin) variant is used for the compact SWD+JTAG interface on STM32 and nRF52 designs.
Q: What is the operating temperature range?
A: –40°C to +105°C continuous. The Nylon 6T insulator is UL94V-0 flame retardant and tolerates standard lead-free reflow profiles (peak 260°C) for SMT variants.
