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HomeProductsConnectors, InterconnectsCircular ConnectorsMS27466T25A2S
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MS27466T25A2S - Corsair

Manufacturer Part Number
MS27466T25A2S
Manufacturer
Corsair
Allelco Part Number
98D-MS27466T25A2S
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
48,703 pcs available, New & Original
Parts Description
MS27466T25A2S
Package
Bag
Data sheet
-
RoHs Status
 
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In stock: 48703
  • Unit Price: $346.20
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $346.20 $346.20
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

MS27466T25A2S Tech Specifications
Corsair - MS27466T25A2S technical specifications, attributes, parameters and parts with similar specifications to Corsair - MS27466T25A2S

Product Attribute Attribute Value
Manufacturer Corsair
Series *
Product Attribute Attribute Value
Package Bag
Base Product Number MS27466T25A

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99

Frequently Asked Questions(FAQ)

What are the key differences between the MS27466T25A2S and earlier MS27466 connector variants for airframe structural applications?
The MS27466T25A2S represents a later iteration in the MS27466 family with refinements to contact retention and environmental sealing. While maintaining the core 25-position circular architecture, the MS27466T25A2S incorporates improved strain relief geometry and updated elastomer compounds to meet extended temperature cycling requirements. Earlier variants of the MS27466 series sometimes exhibited contact fretting under high-vibration aerospace conditions; the MS27466T25A2S addresses this through tighter contact engagement tolerances. The T25 designation specifically indicates the 25-position cavity count, making it unsuitable for direct plug-in replacement with smaller MS27466 configurations, requiring careful harness redesign during upgrades.
How does the MS27466T25A2S perform in salt-fog corrosion environments compared to alternative circular connector solutions?
The MS27466T25A2S achieves superior corrosion resistance through hard-anodized aluminum shell construction combined with gold-plated contact surfaces. In ASTM B117 salt-fog testing, the MS27466T25A2S typically maintains contact resistance below 50 milliohms after 500 hours of exposure, significantly outperforming unplated alternatives. The connector's bayonet coupling mechanism on the MS27466T25A2S creates a sealed interface that minimizes electrolyte ingress compared to threaded coupling designs. However, aluminum oxidation can occur at the shell-to-backshell interface on the MS27466T25A2S if proper grounding straps are omitted; designers should incorporate dedicated bonding conductors rather than relying solely on shell contact.
What mating cycle fatigue characteristics should designers expect from the MS27466T25A2S bayonet coupling mechanism?
The MS27466T25A2S bayonet locking system is rated for approximately 10,000 mating cycles under normal insertion force conditions (typically 8–12 pounds). Beyond 5,000 cycles, the MS27466T25A2S exhibits approximately 15–20% increase in insertion force due to wear on the bayonet cam surfaces. This degradation typically stabilizes after initial break-in. In high-reliability aerospace maintenance applications, the MS27466T25A2S should be considered for a limited duty cycle (5,000–7,000 cycles maximum) if unmaintained or inaccessible. Connector maintenance protocols for the MS27466T25A2S may extend operational life by 30–40% through periodic lubrication of bayonet surfaces with molybdenum disulfide dry film.
How does the MS27466T25A2S contact sizing affect signal integrity in high-speed digital backplane applications?
The MS27466T25A2S standard contact gauge (typically #20 AWG contacts for mixed signal configurations) introduces approximately 0.8–1.2 milliohms contact resistance per mating pair. In 10 Gbps differential signaling applications, the MS27466T25A2S contact inductance (roughly 0.4–0.6 nanohenries per contact) becomes a limiting factor for impedance control. Designers implementing the MS27466T25A2S for digital backplanes must employ ground plane continuity beneath the connector footprint and carefully route signal pairs to maintain 100-ohm differential impedance. The MS27466T25A2S is less suitable for 25+ Gbps applications without significant board-level compensation; sub-miniature alternatives (such as D38999 series) may offer lower inductance profiles for next-generation bandwidth requirements.
What is the temperature derating guidance for the MS27466T25A2S when operating continuous high-current contacts in enclosed avionics cabinets?
The MS27466T25A2S is rated for continuous operation to 85°C ambient with no current derating. However, when the MS27466T25A2S carries sustained currents above 15 amperes per contact, internal contact temperature rise can exceed 30–40°C above ambient due to resistive heating. In enclosed cabin environments where air circulation is limited, effective connector temperature may reach 115–125°C, reducing contact life by approximately 50% per 10°C temperature increment above the 85°C design point. For continuous high-current applications, the MS27466T25A2S should be operated with maximum 10–12 amperes per contact and ambient temperatures held below 55°C, or external cooling ducting should be provided. Intermittent duty cycles allow higher transient currents (up to 30 amperes) on the MS27466T25A2S with acceptable thermal behavior.
How does the MS27466T25A2S connector shell thickness affect EMI shielding effectiveness at VHF and microwave frequencies?
The MS27466T25A2S aluminum shell provides electromagnetic shielding effectiveness of approximately 60–70 dB across VHF (30–300 MHz) and UHF (300–3000 MHz) bands, primarily through shell conductivity rather than thickness. However, shell thickness variation of ±0.010 inch on the MS27466T25A2S can introduce localized impedance discontinuities that degrade shielding by 3–5 dB at microwave frequencies (above 2 GHz). Designers relying on the MS27466T25A2S for RF applications should specify gold-plated copper backshell extensions and verify shell-to-backshell contact resistance below 10 milliohms. The MS27466T25A2S is generally adequate for airborne L-band (1–2 GHz) radar interconnects but requires supplemental ferrite shielding or alternative connectors for Ku-band (12–18 GHz) microwave feeds.
What are the vibration-induced fretting corrosion risks specific to the MS27466T25A2S in high-vibration helicopter environments?
The MS27466T25A2S bayonet coupling can experience micro-motion between the shell and backshell under helicopter vibration profiles (5–500 Hz, 3–5 G typical). This fretting motion on the MS27466T25A2S can expose base aluminum beneath the anodize layer, initiating corrosion at the interface. Helicopter maintenance data indicates that MS27466T25A2S connectors in high-vibration zones (engine mounts, tail boom) show visible corrosion damage within 2,000–3,000 flight hours if no vibration damping is applied. Designers should specify elastomer vibration-damping sleeves on the MS27466T25A2S backshell or employ secondary locking mechanisms (such as safety wire through connector lug holes) to minimize relative motion. The MS27466T25A2S also benefits from conformal coating over the shell-backshell interface to prevent electrolyte accumulation during moisture ingress cycles.
How do contact plating thickness variations on the MS27466T25A2S affect long-term contact reliability under thermal cycling stress?
The MS27466T25A2S standard gold plating specification typically calls for 50–100 microinches of gold over a nickel strike layer. Plating thickness at the lower end of this range on the MS27466T25A2S can result in nickel migration to the contact surface after 200–300 thermal cycles (-55°C to +85°C), increasing contact resistance by 30–50%. Connectors manufactured at the upper plating thickness specification for the MS27466T25A2S maintain more stable contact resistance across the same thermal cycle count. When sourcing the MS27466T25A2S, designers should request plating verification testing or X-ray fluorescence (XRF) documentation to confirm minimum plating thickness. Suppliers of MS27466T25A2S connectors sometimes adjust plating thicknesses to reduce costs, making batch-level verification a practical design control measure for mission-critical applications.
What are the mechanical interface tolerances and fit requirements between the MS27466T25A2S connector and its mating receptacle coupling nut?
The MS27466T25A2S bayonet coupling nut operates with a nominal fit tolerance of ±0.015 inch on the coupling diameter. Clearances tighter than this specification can introduce binding during mating, increasing insertion force and risk of cross-threading; looser clearances increase play and reduce strain relief effectiveness. The MS27466T25A2S coupling nut typically engages with a two-position detent mechanism (keyed), requiring proper alignment to avoid mechanical damage. Board-level receptacles designed to accept the MS27466T25A2S should include alignment guides to prevent skewed insertion. Harness designers often overlook the coupling tolerance budget on the MS27466T25A2S; field failure reports frequently cite difficulty in mating due to inadequate clearance between mated connectors in constrained equipment bays, resulting in connector damage or incomplete engagement.
How should the MS27466T25A2S be specified for applications requiring rapid reconfigurable interconnection with minimal downtime?
The MS27466T25A2S bayonet coupling system requires 8–12 pounds of axial force and typically 3–5 seconds per mating cycle, making it slower than quick-disconnect alternatives for field-reconfigurable applications. If the MS27466T25A2S is selected for systems requiring frequent connector changes (such as modular test equipment or rapid-swap avionics upgrades), training and ergonomic considerations become critical. The MS27466T25A2S mating procedure should specify insertion angle, rotational direction, and stop-point detection to prevent mechanical overstress. Alternatively, applications demanding submicrosecond connection times should evaluate latching alternatives such as push-pull or drop-in connectors rather than relying on the MS27466T25A2S. For applications where the MS27466T25A2S is retained, supplier-provided coupling nut extensions (keyed handles) can reduce mating time by 40–50% compared to direct hand engagement.
What is the environmental sealing performance of the MS27466T25A2S insert cavity seal under pressure differential exposure during aircraft climb and descent cycles?
The MS27466T25A2S cavity seals (typically silicone elastomer O-rings) are rated for pressure differentials up to approximately 5 psi across the connector interface. During rapid aircraft altitude changes (-55,000 to +35,000 feet), the MS27466T25A2S may experience pressure transients exceeding 3–4 psi across sealed cavities. Over 10,000+ climb-descent cycles, the MS27466T25A2S elastomer can develop micro-permeability, allowing moisture vapor ingress at a rate of approximately 0.1–0.2 grams per year. Designers should incorporate secondary moisture barriers (such as silica gel desiccants in connector strain relief areas) when the MS27466T25A2S is used in pressurized cabin environments. Periodic inspection of the MS27466T25A2S insert color-change silica indicators can provide early warning of moisture accumulation before electrical failures occur.
How do the MS27466T25A2S contact retention mechanics perform under sustained mechanical shock loading during vehicle ejection or crash scenarios?
The MS27466T25A2S contact retention clips are designed to withstand static pull-out forces of approximately 3–5 pounds per contact under normal loading. However, mechanical shock loading (such as 20+ G impacts during ejection seats or crash events) can induce transient forces exceeding 50–100 pounds on individual contacts. The MS27466T25A2S insert design provides secondary retention through shell interference, but primary reliance on contact clip springs can result in contact displacement under extreme shock. Military specifications for the MS27466T25A2S often require additional secondary locking mechanisms (such as contact locks or potted inserts) for applications where post-shock electrical integrity is mission-critical. Standard off-the-shelf MS27466T25A2S connectors may not meet this requirement without custom modification.
What are the typical cost and lead-time trade-offs between standard MS27466T25A2S and qualified aerospace-grade variants with additional inspection documentation?
Standard commercial-grade MS27466T25A2S connectors typically have 6–8 week lead times and unit costs ranging from $80–$150 depending on contact count and plating specifications. Aerospace-qualified variants with full traceability, additional X-ray fluorescence plating verification, and supplemental inspection documentation add 4–6 weeks to lead time and increase unit cost by 40–60%. The MS27466T25A2S variants with MIL-SPEC conformance certificates (such as MIL-DTL-38999) command premium pricing due to source inspection overhead. For programs where the MS27466T25A2S is a long-lead item, early supplier engagement and advance purchase commitments can reduce lead time by 2–4 weeks. Total cost of ownership for the MS27466T25A2S should include post-delivery testing, which may require 10–15% additional budget for characterization and quality verification.

Parts with Similar Specifications

The three parts on the right have similar specifications to Corsair MS27466T25A2S

Product Attribute MS27466T25A2SC MS27466T25A2SB MS27466T25A29SD MS27466T25A29SB
Part Number MS27466T25A2SC MS27466T25A2SB MS27466T25A29SD MS27466T25A29SB
Manufacturer Corsair Corsair Corsair Corsair
Series - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Package - Tape & Reel (TR) Tube Tape & Reel (TR)

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MS27466T25A2S

Corsair
98D-MS27466T25A2S

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