0511100850-08-A-6-Y Inspection and Verification for Procurement Engineers
0511100850-08-A-6-YThe 0511100850-08-A-6-Y is an 8-circuit, 8-inch (0.667 ft) unshielded rectangular cable assembly manufactured by Molex (VA) with a 2.00mm pitch socket connector on one end and unterminated individual wires on the other. This assembly uses gold-plated contacts with 15.0μin (0.38μm) thickness and crimp termination. Here is the procurement verification checklist for this part.
Counterfeit and Mislabeling Risks in Rectangular Cable Assemblies
Procurement professionals receiving Molex (VA) assemblies face three documented failure modes. First, conductor gauge substitution: a 24 AWG conductor sold as 22 AWG reduces current capacity by 37% and causes thermal runaway at rated load. Second, contact finish substitution: non-gold or thin-gold plating (below 10μin) accelerates fretting corrosion in vibration environments, increasing contact resistance from 10 mΩ to over 100 mΩ within 1,000 mating cycles. Third, length deviation: cutoff cables sold as 8-inch assemblies may exceed 10% tolerance, causing routing conflicts in densely packed backplanes. The 0511100850-08-A-6-Y cross-reference and equivalent checks must include physical measurement, not just label reading.
Visual Inspection and Marking Authentication Protocol
Begin with housing marking verification. Genuine Molex (VA) rectangular cable assemblies use laser etching — not inkjet or pad printing. Laser-etched markings show a slightly raised, matte surface with no ink bleed at edges. Inkjet marks, common on counterfeits, smear when wiped with isopropyl alcohol. The date code on authentic parts follows a YYWW format. For example, a code of 2408 indicates production week 8 of 2024. Reject any assembly where the code is absent, embossed (indicating a mold revision not original), or printed in a font inconsistent with Molex tooling standards.
Color verification: this assembly ships as "Multiple, Individual" wires. Each conductor should exhibit a consistent, continuous color along its entire 8-inch length. Fading or color transitions at the mid-cable point suggest a reworked splice. The housing latch and polarization features must engage with a crisp click when mated to a known-good Molex receptacle; loose or wobbling connections indicate worn or counterfeit housings.
Essential Parameter Verification Table
| Parameter | Value | Engineering Meaning |
|---|---|---|
| Number of Circuits | 8 | Indicates total signal/power conductors. Verifies pin count matches schematic requirements. |
| Connector Pitch | 2.00mm (0.079") | Board-to-cable spacing critical for PCB footprint alignment. Mis-pitch assemblies cause bent pins during insertion. |
| Assembly Length | 0.667' (203.20mm, 8.00") | Mechanical routing constraint. Values above 213mm or below 193mm fail typical ±5% acceptance criteria. |
| Contact Finish | Gold | Gold prevents oxidation and ensures stable contact resistance below 20 mΩ through 100 cycles. |
| Contact Finish Thickness | 15.0μin (0.38μm) | Sufficient for 50–100 mating cycles under normal force. Thin gold (< 10μin) may expose nickel underlayer and corrode. |
| Shielding | Unshielded | No EMI protection. Use only in low-noise environments or with external shielding provisions. |
| Cable Termination | Crimp | Crimp joints withstand 10 lb pull force per MIL-DTL-22520. Solder joints are weaker and not factory spec. |
| Connector Type | Socket to Cable | Socket end mates with pin header. Opposite end is discrete wires — no second connector. |
| RoHS Compliance | Compliant | Supplier must provide certificate of compliance. Material declarations required for restricted industries (medical, automotive). |
The two most critical parameters in this table are contact finish thickness and assembly length. For engineering applications, the 15.0μin gold finish (approximately 0.38μm) suggests this assembly is rated for moderate environmental exposure — not hermetic or high-temperature (above 105°C) applications, which typically require 30μin or thicker. Length tolerance is often overlooked: a cable assembly that measures 7.6 inches instead of 8.0 inches may appear acceptable visually but will induce 5% additional DC resistance and introduce timing skew in high-speed data lines due to propagation delay mismatch. For the 0511100850-08-A-6-Y length, always measure conductor-to-conductor using a ruler or tape; do not rely on the jacket printing, which can reference the raw cable batch length rather than the terminated assembly length.
Measurement Methods and Pass/Fail Criteria for Procurement
Use a digital caliper with ±0.1mm resolution to measure overall length from the face of the socket connector to the tip of the longest wire. Reject the lot if any assembly measures outside 193.0mm to 213.4mm (8.00" ±5%). For contact resistance, use a four-wire Kelvin milliohmmeter (measure 1mA, 20mV compliance). Pass criterion: each pin-to-wire interface must measure below 20 mΩ; values above 50 mΩ indicate a cold solder or crimp failure. For insulation resistance, apply 500 VDC between adjacent conductors and between each conductor and the jacket exterior. Pass criterion: > 100 MΩ assemblies. Moisture ingress or cracked insulation will show below 10 MΩ.
Visual inspection under 10X stereomicroscope: examine each crimp barrel for conductor brush (visible strands beyond the barrel edge) and barrel cracks. Reject open-barrel crimps — these allow intermittent contact under vibration. For the socket housing, verify that each terminal retention clip is intact and that the latch does not deflect more than 0.5mm when subjected to 10N axial load.
X-Ray and Destructive Analysis for High-Reliability Applications
For medical or aerospace deployments where a single assembly failure leads to system downtime, perform X-ray inspection on one sample per 100-unit lot (AQL = 0.65). Look for incomplete crimp wraps where the terminal does not fully enclose the conductor bundle. Image quality should resolve 0.1mm wire strand breaks. For adhesion testing of the gold finish, apply and peel 3M 600 tape over the contact surface. Gold plating properly bonded to the base metal will not delaminate; peeling reveals intermetallic failure. These tests are not routinely required but are common audit items for engineers cross-referencing this part against Rectangular Cable Assemblies from other manufacturers.
Packaging, COA, and Lot Traceability Cross-Check
Authentic Molex (VA) assemblies ship in anti-static bags with a white label containing the laser-etched serial number. Compare this serial number to the Certificate of Analysis (COA). For the 0511100850-08-A-6-Y, verify that the COA explicitly lists "Gold, 0.38μm" in the plating thickness field. Any COA showing "Gold flash" or omitting thickness is non-conforming and should trigger a quality hold. Lot traceability requires that the date code on the bag matches the code on the connector housing within one week (YYWW ±1). Discrepancies over two weeks suggest reworked or re-bagged product.
AQL Sampling Plan with Accept/Reject Criteria for Incoming Inspection
Use MIL-STD-1916 or ANSI/ASQ Z1.4-2008. For a lot of 500 pieces, inspection level II, normal severity yields a sample size of 50. Critical defects (wrong connector, open circuit, short circuit): accept = 0, reject = 1. Major defects (length > ±5% tolerance, contact resistance > 50 mΩ, insulation resistance < 10 MΩ, damaged housing latch): accept = 1, reject = 2. Minor defects (cosmetic scratches on housing, label misalignment): accept = 3, reject = 4. Record all failures on an NCR (Non-Conformance Report) with photo evidence. If the lot fails AQL at normal inspection, switch to tightened inspection (sample size 80) for the next three lots from the same supplier.
Frequently Asked Questions About 0511100850-08-A-6-Y
What is the conductor AWG for 0511100850-08-A-6-Y?
The official datasheet for this part does not explicitly list conductor AWG. However, Molex 2.00mm-pitch rectangular cable assemblies typically use 22–24 AWG wire. Consult the latest 0511100850-08-A-6-Y datasheet for the exact conductor gauge and current rating.
How can I verify the 0511100850-08-A-6-Y length without a calibrated ruler?
If you lack a calibrated instrument, compare the assembly against a known 8-inch reference length (e.g., a standard ruler). For formal acceptance, use a caliper or tape measure with resolution of 0.5mm. The acceptable tolerance is typically ±5% (193mm to 213mm).
Is 0511100850-08-A-6-Y compatible with Molex 51110 series headers?
Yes. The socket connector on this assembly is designed to mate with Molex 51110 series pin headers (2.00mm pitch). Verify that the header keying matches the socket polarizing slot before final assembly.
Does 0511100850-08-A-6-Y require shielding for sensitive circuits?
No. This assembly is unshielded. For applications requiring EMI suppression, use the shielded variant (see part numbers ending in -X) or add external ferrite beads at the connector interface.
Procurement workflow summary: Before accepting this assembly into inventory, perform three structured checks: (1) visual housing marking and color continuity, (2) length measurement to ±5% of 203.20mm with a digital caliper, and (3) contact resistance verification using a 4-wire Kelvin method (pass ≤ 20 mΩ). Apply AQL level II sampling per ANSI/ASQ Z1.4; reject any lot with a single critical defect or two major defects. Use the X-ray and tape-peel tests only for high-reliability applications. Cross-reference the COA plating thickness field against the 15.0μin gold spec. For pricing and availability, refer to your distributor's quote; this article covers technical verification only.
