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Home Products Connectors, Interconnects Circular Connectors~~806-040-MT20E33G28PTB~~

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806-040-MT20E33G28PTB - Glenair

Manufacturer Part Number: 806-040-MT20E33G28PTB

Manufacturer: Glenair

Allelco Part Number: 98D-806-040-MT20E33G28PTB

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 29,558 pcs available, New & Original

Parts Description: Circular connector

Package: Retail Package

Data sheet: 806-040-MT20E33.pdf

Datasheets
Mighty Mouse Series 80.pdf

RoHs Status

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In stock: 29558

Unit Price: $3,499.99
Subtotal: $0.00

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Quantity	Unit Price	Ext. Price
1+	$3,499.99	$3,499.99

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Specifications

806-040-MT20E33G28PTB Tech Specifications
Glenair - 806-040-MT20E33G28PTB technical specifications, attributes, parameters and parts with similar specifications to Glenair - 806-040-MT20E33G28PTB

Product Attribute	Attribute Value
Manufacturer	Glenair
Series	*

Product Attribute	Attribute Value
Package	Retail Package

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	Not applicable
Moisture Sensitivity Level (MSL)	Not Applicable
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8536.69.4020

Frequently Asked Questions(FAQ)

What makes the 806-040-MT20E33G28PTB suitable for aerospace applications compared to standard industrial circular connectors?: The 806-040-MT20E33G28PTB is engineered for aerospace environments through several design characteristics. The aluminum shell with nickel/PTFE finish provides corrosion resistance across the connector's operating range of -65°C to 175°C, which spans thermal extremes encountered in high-altitude and propulsion systems. The gold contact finish at 50.0µin thickness ensures consistent mating performance through multiple connect/disconnect cycles while resisting oxidation. The threaded fastening mechanism and flange panel mount design minimize vibration-induced loosening, a critical failure mode in aircraft structures. The 1300VDC voltage rating and 5A current capacity per contact support both primary power distribution and signal integrity in avionics and engine control systems where single-point failures create cascading risks.

How does the 28-position configuration of the 806-040-MT20E33G28PTB affect harness design and fault tolerance in multi-system applications?: The 28-position architecture of the 806-040-MT20E33G28PTB allows consolidation of multiple functional circuits—power, control signals, and feedback—into a single connector interface. This density reduces overall connector count and cable mass, both critical in aerospace weight optimization. However, this consolidation creates design trade-offs: a single mechanical failure at the receptacle can disrupt multiple independent systems. Design practice therefore requires functional separation within the 28-position arrangement, with power circuits isolated to specific pin groups and redundant signal paths assigned to physically separated positions. The solder termination method for the 806-040-MT20E33G28PTB demands careful harness routing to prevent thermal stress at termination points, particularly during thermal cycling between -65°C and 175°C operating limits.

What thermal management considerations apply when operating the 806-040-MT20E33G28PTB at its maximum current rating in confined equipment bays?: At 5A per contact, the 806-040-MT20E33G28PTB can carry up to 140A if all 28 positions are populated at maximum rating. This aggregate current generates localized heating at the solder termination interface and within the connector shell. In high-density aerospace equipment bays with limited ventilation, the aluminum shell of the 806-040-MT20E33G28PTB does provide some passive thermal conductivity, but active thermal analysis is required to validate contact temperature rise. Industry practice applies a 20–30% derating factor for continuous operation; thus the effective 28-position throughput is typically limited to 3.5–4A per contact in thermally constrained installations. The nickel/PTFE shell finish of the 806-040-MT20E33G28PTB has lower thermal emissivity than bare aluminum, requiring design compensation through either forced-air cooling or reduced cable loading.

How does the 806-040-MT20E33G28PTB receptacle design handle moisture ingress in pressurized versus unpressurized aircraft compartments?: The 806-040-MT20E33G28PTB features an environment-resistant ingress protection rating, achieved through the nickel/PTFE shell finish and threaded coupling design that creates a sealed interface when mated. In pressurized compartments, internal cabin pressure prevents external moisture infiltration, and the 806-040-MT20E33G28PTB operates reliably. In unpressurized bays and external applications, moisture can migrate along solder joints and copper alloy contacts of the 806-040-MT20E33G28PTB, particularly during altitude changes that induce condensation cycles. The gold contact finish (50.0µin thickness) resists initial corrosion, but beneath this layer the copper alloy substrate is vulnerable. Extended storage of disconnected 806-040-MT20E33G28PTB receptacles in unpressurized conditions may require protective caps and periodic inspection of contact condition before reinstallation.

Why is solder termination specified for the 806-040-MT20E33G28PTB rather than crimp termination, and what process controls are necessary?: The 806-040-MT20E33G28PTB uses solder termination because the 28-position density and contact spacing create accessibility constraints incompatible with crimp tooling. Solder termination allows flexible conductor routing and reliable mechanical attachment without specialized insertion tools. However, solder termination introduces thermal stress; the copper alloy contacts of the 806-040-MT20E33G28PTB must withstand soldering temperatures (typically 250–260°C) without softening or losing the gold finish. Aerospace harness specifications for the 806-040-MT20E33G28PTB require validated reflow profiles, solder alloy compatibility verification (lead-free compliance or tin/lead specifications), and post-solder inspection via X-ray or cross-section analysis for the first production units. The solder joint quality directly affects the 1300VDC isolation capability of the 806-040-MT20E33G28PTB, as micro-fractures or void formations can create arcing paths under high voltage.

What is the practical mating cycle lifetime of the 806-040-MT20E33G28PTB, and how does gold contact thickness influence durability?: The 806-040-MT20E33G28PTB contact finish thickness of 50.0µin (1.27µm) is at the lower end of aerospace specifications, which typically range from 50–100µin. This thickness supports approximately 500–1000 mating cycles before gold depletion exposes the underlying copper alloy. The actual cycle count depends on contact force, insertion angle, and environmental contamination. In high-vibration aerospace environments where micro-motion between mated contacts occurs, the 806-040-MT20E33G28PTB experiences accelerated wear; cycles may reduce to 300–500 before resistance degradation becomes measurable. The nickel underplate of the 806-040-MT20E33G28PTB provides some secondary protection, but once breached, corrosion proceeds rapidly. Design practice therefore limits the 806-040-MT20E33G28PTB to applications with infrequent mating (production assembly, maintenance removal, or modular subsystem swaps) rather than field-replaceable units requiring weekly reconfiguration.

How do the -65°C to 175°C operating limits of the 806-040-MT20E33G28PTB affect material selection and interconnect reliability?: The 240°C temperature span of the 806-040-MT20E33G28PTB creates significant material compatibility challenges. The aluminum shell exhibits coefficient of thermal expansion (CTE) mismatch with copper alloy contacts and solder interconnects; differential expansion during thermal cycling induces mechanical stress at the contact interface and solder joint. Over repeated -65°C to 175°C cycles, the 806-040-MT20E33G28PTB solder joints may develop micro-fractures, reducing electrical conductivity and increasing contact resistance. The nickel/PTFE shell finish of the 806-040-MT20E33G28PTB also becomes more brittle at -65°C; mechanical shock combined with low temperature can cause finish cracking and subsequent corrosion. Cable materials mated to the 806-040-MT20E33G28PTB must maintain flexibility at -65°C and resist thermal degradation at 175°C; this typically restricts choices to high-temperature silicone or polyimide jackets. Qualification testing of the 806-040-MT20E33G28PTB includes thermal shock cycles (-65°C to +175°C in 10–15 minute intervals) to validate long-term integrity.

How does the 1.444-inch cable opening of the 806-040-MT20E33G28PTB constrain backshell and harness bundle configurations?: The cable opening of 1.444 inches (36.68mm) on the 806-040-MT20E33G28PTB accommodates standard aerospace cable bundles with a maximum diameter of approximately 1.4 inches before strain relief interference. The aluminum backshell material of the 806-040-MT20E33G28PTB must provide strain relief over a transition length of 0.5–1.0 inch to protect the solder-terminated conductors from bending stress. If the cable bundle exceeds the opening diameter, the 806-040-MT20E33G28PTB backshell may compress the outer shield or jacket, creating localized damage and potential short-circuit paths. In harnesses with 28 conductors (0.050–0.075 inch diameter each), the cable assembly reaches maximum volumetric packing near the 1.444-inch opening limit. Additional drains, twisted pairs, or shielding layers must be carefully routed; the 806-040-MT20E33G28PTB strain relief design does not accommodate coiled or bundled drain wires without custom backshell modification.

What are the key differences between the 806-040-MT20E33G28PTB and comparable 20–28 position connectors from competing manufacturers?: The 806-040-MT20E33G28PTB belongs to Glenair's Mighty Mouse 806 series, positioned as a compact aerospace circular connector. Compared to MIL-DTL-38999 Series II connectors in equivalent shell sizes, the 806-040-MT20E33G28PTB offers higher contact density and lower cost but with reduced contact redundancy and lower mating cycle rating (typically 500–1000 versus 10,000+ for full MIL-spec alternatives). The gold contact thickness of 50.0µin on the 806-040-MT20E33G28PTB is lighter than premium aerospace grades (100µin+), reducing cost and environmental impact but requiring higher acceptance of wear-related aging. Alternative suppliers such as Amphenol and TE Connectivity offer comparable 28-position connectors with solder termination; the 806-040-MT20E33G28PTB differentiates through the combination of nickel/PTFE shell finish (superior to anodized aluminum in corrosion resistance) and aluminum backshell (lighter than steel alternatives). Total lifecycle cost favors the 806-040-MT20E33G28PTB in applications with moderate mating cycle counts and favorable thermal environments.

What inspection and acceptance criteria should be applied to 806-040-MT20E33G28PTB receptacles before installation in critical systems?: Incoming inspection of the 806-040-MT20E33G28PTB should verify shell finish integrity (no visible corrosion, pitting, or discoloration of the nickel/PTFE coating), contact geometry (no bent or misaligned pins visible through the 28-position aperture), and mechanical function (threaded coupling rotates smoothly, flange mounting holes are undamaged). For solder-terminated 806-040-MT20E33G28PTB units, X-ray inspection at 1–3% sampling rate confirms solder joint completeness and void absence; any void exceeding 20% of joint volume triggers lot rejection. Contact resistance measurement (target <50 milliohms across the 1300VDC rating) validates contact finish quality. Environmental stress screening (thermal cycling -65°C to 175°C for 5–10 cycles) accelerates latent defects in the 806-040-MT20E33G28PTB solder joints and is recommended for flight-critical harnesses. Documentation verification confirms traceability of the 806-040-MT20E33G28PTB manufacturing date, supplier lot, and relevant certifications (RoHS status, REACH compliance status, ECCN classification).

How should the 806-040-MT20E33G28PTB be stored and handled to maintain contact finish quality and prevent corrosion?: The 806-040-MT20E33G28PTB should be stored in climate-controlled conditions (relative humidity 30–60%, temperature 15–25°C) to prevent moisture-driven corrosion of the gold contact finish and copper alloy substrates. Unmated 806-040-MT20E33G28PTB receptacles should be fitted with protective caps to exclude dust and condensation; moisture ingress along the 28 contact pins can activate galvanic corrosion pathways within days. Extended storage (>6 months) of the 806-040-MT20E33G28PTB requires periodic inspection and possible re-cleaning with isopropyl alcohol to remove surface contaminants before harness assembly. The solder-terminated leads of the 806-040-MT20E33G28PTB must be protected during handling to prevent mechanical stress that could crack solder joints; vibration during transport should be minimized through shock-absorbing packaging. Electrostatic discharge (ESD) precautions are required when handling the 806-040-MT20E33G28PTB in high-voltage applications; the 1300VDC rating creates risk of contact degradation through ESD-induced micro-arcing during assembly.

What field troubleshooting steps should be followed if the 806-040-MT20E33G28PTB develops intermittent electrical performance in service?: Intermittent faults in an installed 806-040-MT20E33G28PTB often originate from contact resistance degradation or solder joint micro-fractures. First, measure DC resistance across the suspected signal pins of the 806-040-MT20E33G28PTB using a digital multimeter; resistance above 100 milliohms (compared to a baseline <50 milliohms) indicates contact oxidation or joint degradation. Next, inspect the 806-040-MT20E33G28PTB mating interface for visible corrosion, moisture, or discolored contact surfaces; if present, carefully disconnect the connector and clean both mating surfaces with isopropyl alcohol and lint-free wipes. Reconnect the 806-040-MT20E33G28PTB and repeat resistance measurement; if resistance improves, surface oxidation was the cause. If resistance remains elevated, the solder joint is likely fractured and replacement is required. Thermal cycling stress testing (disconnect/reconnect the 806-040-MT20E33G28PTB and repeat measurements through 5–10 temperature cycles from -20°C to +60°C) can reveal marginal solder joints that fail intermittently. If the 806-040-MT20E33G28PTB shows age-related contact wear (gold finish depletion visible on contact surfaces), replacement should be planned proactively to avoid in-service failures.

Parts with Similar Specifications

The three parts on the right have similar specifications to Glenair 806-040-MT20E33G28PTB

Product Attribute
Part Number	806-040-MT20E33G28PTE	806-040-MT20E33G28PTC	806-040-MT20E33G28PTD	806-040-MT20E33G28PTF
Manufacturer	Glenair	Glenair	Glenair	Glenair
Series	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)

806-040-MT20E33G28PTB Datasheet PDF

Download 806-040-MT20E33G28PTB pdf datasheets and Glenair documentation for 806-040-MT20E33G28PTB - Glenair.

Datasheets: Mighty Mouse Series 80.pdf

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