Key Engineering & Assembly Failure Modes
Hardware Mass & Inertial Shift
Solid brass and copper parts are much heavier than standard chip passives, prone to shifting during rapid acceleration.
Vacuum Seal Failure on Hollow Parts
Through-hole nuts without top pick-up caps cause vacuum leakage, triggering feeder alarms and mispicks.
Cover Tape Peel Force Variations
Peel forces outside the 20g~120g range cause tape snagging or premature part release inside the feeder.
EIA-481 Standard Carrier Tape Specification Matrix
CUNECTRA STANDARD SPEC| Hardware Category | Tape Width (W) | Pocket Pitch (P2) | Pocket Depth (Ko) | Pick-up Cap Type | Standard Reel Qty |
|---|---|---|---|---|---|
| SMT Nuts M2 ~ M3 | 16 mm / 24 mm | 8 mm / 12 mm | 2.2 ~ 4.5 mm | High-Temp Kapton Film | 1,500 ~ 3,000 pcs / 13" |
| SMT Standoffs M4 ~ M5 | 24 mm / 32 mm | 12 mm / 16 mm | 4.8 ~ 8.5 mm | Silicone Plug / Kapton | 800 ~ 1,500 pcs / 13" |
| PCB SMT Busbars (50A~150A) | 24 mm / 32 mm | 12 mm / 16 mm | 3.0 ~ 6.0 mm | Flat Top Pick Zone | 1,000 ~ 2,000 pcs / 13" |
| High-Current Jumpers | 32 mm / 44 mm | 16 mm / 20 mm | 4.0 ~ 7.5 mm | Centered Pick Pad | 500 ~ 1,200 pcs / 13" |
Design for Manufacturability Guidelines
Pick Surface Flatness
Surface flatness tolerance across pick area kept within 0.03 mm, roughness Ra ≤ 0.8 μm.
Coplanarity Limits
Coplanarity of SMT solder interface ≤ 0.08 mm (miniature) or ≤ 0.10 mm (power hardware).
Anti-Wicking Solder Stop
Recessed blind cavity ≥ 0.35 mm from bottom solder pad to internal thread entry.
Frequently Asked Questions
Are CUNECTRA tape & reel reels compatible with ASM, Panasonic, Fuji, and Yamaha feeders?+
Yes. All carrier reels strictly comply with EIA-481-F with standard 13-inch (330mm) reel diameter and 100mm core, fully compatible with modern smart electric and pneumatic feeders.
Does the high-temperature Kapton cap need manual removal after reflow?+
No. Mounting screws can penetrate the film directly during final chassis assembly, or automated test jigs can blow/peel them off in batch, saving labor.