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HomeProductsConnectors, InterconnectsRectangular Connectors - Board Spacers, Stackers (Board to Board)DW-20-11-L-D-222
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DW-20-11-L-D-222 - Samtec Inc.

Manufacturer Part Number
DW-20-11-L-D-222
Manufacturer
Samtec, Inc.
Allelco Part Number
98D-DW-20-11-L-D-222
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
46,049 pcs available, New & Original
Parts Description
CONN HDR 40POS 0.1 STACK T/H
Package
Bulk
Data sheet
DW-20-11-L-D-22.pdf
RoHs Status
ROHS3 Compliant
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In stock: 46049

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Specifications

DW-20-11-L-D-222 Tech Specifications
Samtec Inc. - DW-20-11-L-D-222 technical specifications, attributes, parameters and parts with similar specifications to Samtec Inc. - DW-20-11-L-D-222

Product Attribute Attribute Value
Manufacturer Samtec, Inc.
Termination Solder
Series Flex Stack, DW
Row Spacing 0.100" (2.54mm)
Pitch 0.100" (2.54mm)
Package Bulk
Number of Rows 2
Number of Positions 40
Mounting Type Through Hole
Product Attribute Attribute Value
Length - Tail 0.110" (2.794mm)
Length - Stack Height 0.222" (5.638mm)
Length - Post (Mating) 0.598" (15.189mm)
Length - Overall Pin 0.930" (23.622mm)
Contact Finish Thickness - Post (Mating) 10.0µin (0.25µm)
Contact Finish - Post (Mating) Gold
Color Black
Base Product Number DW-20-11

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) Not Applicable
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8536.69.4040

Frequently Asked Questions(FAQ)

What is the actual mating depth for the DW-20-11-L-D-222 header when fully seated with a compatible receptacle?
The DW-20-11-L-D-222 has a mating post length of 0.598" (15.189mm), which defines how far the contact extends into the mating receptacle. This depth is critical for ensuring full electrical contact and mechanical retention. The 0.222" (5.638mm) stack height refers to the connector body thickness itself, not the mating engagement depth. When designing a matching receptacle or cable assembly, the mating post length of the DW-20-11-L-D-222 should be verified against the receptacle's contact socket depth to ensure neither bottoming nor inadequate engagement occurs, as either condition can compromise signal integrity or create intermittent connections.
How does the 0.100" row spacing on the DW-20-11-L-D-222 impact PCB layout density compared to 0.050" pitch connectors?
The DW-20-11-L-D-222 uses 0.100" (2.54mm) pitch with identical 0.100" row spacing, meaning both the column and row intervals are equal. This creates a square grid pattern with 40 positions across 2 rows in approximately 1.95" × 0.1" footprint area. In contrast, 0.050" pitch connectors occupy roughly one-quarter the linear footprint for equivalent position counts but demand significantly tighter PCB trace routing, higher layer counts for breakout, and finer via drilling. The DW-20-11-L-D-222's 0.100" spacing is more forgiving for hand soldering, rework, and automated assembly at typical manufacturing tolerances, making it suitable for applications where vibration resistance and repair accessibility outweigh spatial constraints.
Why is the gold contact finish thickness specified as 10.0µin for the DW-20-11-L-D-222, and what does this imply for connector service life?
The DW-20-11-L-D-222 gold plating thickness of 10.0µin (0.25µm) is a minimum specification that protects the underlying nickel or copper base metal from oxidation and corrosion during storage and mating cycles. This thickness is typical for general-purpose signal and power connectors in non-harsh environments. Over repeated mating cycles, the gold layer gradually wears from contact wiping action; at 10.0µin, the DW-20-11-L-D-222 typically supports 50–200 mating insertions before base metal exposure becomes likely, depending on contact pressure and insertion force. For applications requiring frequent interconnection changes (development boards, test fixtures), this thickness is adequate; however, for sealed or high-vibration environments where corrosion risk is elevated, specifying thicker gold or nickel-barrier plating alternatives may be warranted.
Can the DW-20-11-L-D-222 accommodate both 0.036" and 0.040" diameter wire or component leads, or is it strictly a 0.1" pitch header?
The DW-20-11-L-D-222 is a fixed 0.100" pitch header connector with through-hole solder tails; it does not accept wire or component leads directly into mating receptacles. Instead, the DW-20-11-L-D-222 is soldered to PCB pads and then receives a compatible receptacle or cable connector that mates onto its contact posts. The lead diameter compatibility question applies to the receptacle connector mated to the DW-20-11-L-D-222, not the header itself. Lead diameter selection (0.036", 0.040", etc.) is determined by the receptacle specification, contact retention spring force, and application vibration or shock requirements, independent of the DW-20-11-L-D-222 header pitch.
What is the difference between the DW-20-11-L-D-222 and other DW series headers, and how do the suffix codes affect compatibility?
The DW-20-11-L-D-222 decodes as follows: DW (Flex Stack series), 20 (40 positions), 11 (2-row configuration), L (dual-in-line arrangement), D (gold plated contacts), 222 (0.222" stack height). The base product number is DW-20-11, and the -L-D-222 suffix defines the specific package and finish. Variants within the DW-20-11 family may differ in stack height (affecting overall board clearance), contact finish (gold vs. tin), or plating thickness. The DW-20-11-L-D-222's 0.222" stack height is relatively compact, suitable for applications with height constraints; taller variants add clearance for wire routing beneath the connector. Cross-family compatibility is generally not possible without verifying post length, row spacing, and contact retention specifications, as mating receptacles are specifically designed for the DW-20-11-L-D-222 geometry and electrical rating.
Is the DW-20-11-L-D-222 suitable for high-speed digital or RF applications, or is it limited to low-frequency power and signal?
The DW-20-11-L-D-222 is a general-purpose through-hole header connector not specifically optimized for controlled impedance or high-speed digital transmission. At 0.100" pitch, the capacitive coupling and crosstalk between adjacent rows becomes measurable above approximately 50–100 MHz depending on trace length and signal levels. The gold plating on the DW-20-11-L-D-222 ensures low contact resistance for DC and low-frequency applications, but no impedance matching or shielding is provided. For applications exceeding 100 MHz or requiring sub-nanosecond rise times, using the DW-20-11-L-D-222 would necessitate careful PCB layout, length matching, and termination to control signal integrity. High-speed or RF designs typically employ miniature connectors with integral shielding or controlled-impedance headers rather than the DW-20-11-L-D-222 format.
How does the 0.110" tail length on the DW-20-11-L-D-222 affect solder joint reliability in automated wave or reflow processes?
The DW-20-11-L-D-222 has a 0.110" (2.794mm) solder tail designed for through-hole wave soldering or manual solder processes. This relatively short tail length minimizes thermal mass and reduces the time required to reach reflow temperatures, lowering the risk of cold solder joints or thermal stress on the connector body. However, the short tail provides limited mechanical standoff; solder fillets around the DW-20-11-L-D-222 tail must be carefully inspected to ensure full wetting and adequate fillet radius (typically 0.5–0.8mm per IPC-A-610 standards). In automated wave soldering, the DW-20-11-L-D-222 should be mounted with the connector body perpendicular to the solder wave to allow flux and solder to reach the tail efficiently. PCB pads should be sized to accommodate the 0.110" tail without excessive solder bridging to adjacent pads, which is typically managed through standard 0.100" pitch pad spacing rules.
What mounting considerations should be observed to prevent the DW-20-11-L-D-222 from shifting or rotating during assembly or in-service vibration?
The DW-20-11-L-D-222 relies on solder joint strength and PCB pad adhesion for mechanical stability; it does not include integral mounting tabs or screw holes. To prevent rotation or lateral shift during assembly, the DW-20-11-L-D-222 should be held in place using a fixture or jig until solder cooling is complete. The 0.222" stack height provides minimal leverage, reducing rotation risk compared to taller connectors, but vibration environments exceeding 5–10 G can still induce joint fatigue. For high-vibration applications, supplemental mechanical retention—such as an epoxy dot applied to one corner of the DW-20-11-L-D-222 housing or a PCB-mounted plastic clamp—should be considered. The through-hole solder connection of the DW-20-11-L-D-222 is more vibration-resistant than surface-mount alternatives, provided the solder joint is inspected for voids and cold spots.
Can the DW-20-11-L-D-222 be reliably used in applications requiring frequent mating and unmating, such as test fixtures or development boards?
The DW-20-11-L-D-222 is well-suited for development and test fixture applications where repeated mating cycles are expected. The through-hole solder connection provides robust mechanical retention on the PCB side, and the 0.100" pitch ensures adequate contact wiping distance during insertion to remove light oxidation and establish low contact resistance. The gold plating on the DW-20-11-L-D-222 supports an estimated 50–200 mating cycles before base metal exposure becomes probable, depending on contact pressure and insertion force of the mating receptacle. In test environments, contact resistance should be monitored periodically; if insertion force increases significantly or intermittent electrical faults develop, the DW-20-11-L-D-222 contacts may require cleaning or the mating receptacle may need replacement. For mission-critical or production applications requiring thousands of cycles, sealed or high-durability connector families with thicker plating or superior contact geometry should be evaluated instead.
Does the DW-20-11-L-D-222 require special handling or storage conditions due to its moisture sensitivity level or RoHS compliance?
The DW-20-11-L-D-222 is marked as "Not Applicable" for Moisture Sensitivity Level (MSL), indicating it does not absorb significant moisture and does not require baking or desiccant storage before assembly. This simplifies supply chain management and reduces risk of hydrolysis or delamination during reflow. The DW-20-11-L-D-222 is ROHS3 Compliant, meaning it contains no lead, cadmium, mercury, or other restricted substances, and the gold plating thickness meets RoHS material composition limits. The connector can be stored in standard ambient conditions (15–25°C, 30–50% relative humidity) without special preparation. Upon receipt, visual inspection for bent pins or contact corrosion is recommended, but the DW-20-11-L-D-222 does not require conditioning prior to use. REACH Unaffected status indicates no specific substance authorization or candidate list concern.
How does the DW-20-11-L-D-222 compare to press-fit or spring-contact alternatives for prototyping versus production environments?
The DW-20-11-L-D-222 is a solder-on through-hole header, fundamentally different from spring-contact or press-fit connectors. In prototyping and development, the DW-20-11-L-D-222 offers flexibility: it can be manually soldered with a simple iron, repositioned if needed before cooling, and replaced without specialized fixtures if damaged. Spring-contact alternatives (such as pogo pins or coil springs) enable tool-free mating on both sides but require tight PCB layout precision and are more expensive per position. Press-fit headers also avoid soldering but demand controlled insertion pressure and may damage PCB laminate if installed incorrectly. For production environments where mating is infrequent and cost-per-unit is critical, the DW-20-11-L-D-222's low cost and high yield in automated assembly make it preferable. For frequent field interconnection or lab use where mating repeatability and ease matter more than unit cost, spring-contact or sliding-pin alternatives may justify higher per-unit expense despite lower density than the DW-20-11-L-D-222.
What electrical performance parameters should be verified when using the DW-20-11-L-D-222 in power distribution or high-current applications?
The DW-20-11-L-D-222 is a general-purpose signal connector; its current rating and voltage limits are not specified in the technical summary but are governed by contact resistance, solder joint cross-section, and Samtec's published ratings for the DW series (typically 1–2 A per contact for signal applications). For power distribution applications, verify the DW-20-11-L-D-222's rated contact resistance (usually <20 mΩ) and multiply by the squared current to estimate I²R heating. If the application requires >1 A per pin, consider dedicated power connector positions with thicker gold plating or confirm with Samtec that the DW-20-11-L-D-222 meets your current budget. The voltage isolation between rows of the DW-20-11-L-D-222 is determined by the plastic base material (typically FR-4 compatible, with surface leakage paths) and should be verified against your isolation class requirement. High-current or high-voltage designs should include margin for contact wear over time, as the DW-20-11-L-D-222 gold plating degrades with repeated insertion.
Are there equivalent or drop-in replacement connectors for the DW-20-11-L-D-222 from other manufacturers, and what compatibility risks should be evaluated?
No true drop-in replacement exists for the DW-20-11-L-D-222 from competitors without detailed cross-reference evaluation. Other manufacturers produce 40-position, 0.100" pitch, 2-row headers (such as those from TE Connectivity, Molex, or Mill-Max), but the DW-20-11-L-D-222's specific combination of 0.222" stack height, 0.598" mating post length, and 0.110" tail length may differ slightly. These dimensional variations can affect clearance with mating receptacles, solder joint geometry, or PCB layout. Any replacement for the DW-20-11-L-D-222 should be verified to have identical post length, row spacing, and plating finish. Contact retention force, insertion force, and electrical ratings must also align. Samtec's DW series is stocked widely and has extensive mating receptacle availability, making cross-sourcing of the DW-20-11-L-D-222 risky without explicit compatibility testing. If supply chain flexibility is needed, specify tolerance bands or qualified alternative part numbers at design review to avoid late-stage surprises.

Parts with Similar Specifications

The three parts on the right have similar specifications to Samtec Inc. DW-20-11-L-D-222

Product Attribute DW-20-11-L-D-472 DW-20-11-L-D-200 DW-20-11-L-D-472-LL DW-20-11-L-D-400
Part Number DW-20-11-L-D-472 DW-20-11-L-D-200 DW-20-11-L-D-472-LL DW-20-11-L-D-400
Manufacturer Samtec Inc. Samtec Inc. Samtec Inc. Samtec Inc.
Contact Finish - Post (Mating) - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Color - - - -
Length - Post (Mating) - - - -
Number of Positions - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Contact Finish Thickness - Post (Mating) - - - -
Row Spacing - - - -
Series - - - -
Length - Tail - - - -
Number of Rows - - - -
Termination - - - -
Length - Overall Pin - - - -
Length - Stack Height - - - -
Pitch - - - -

DW-20-11-L-D-222 Datasheet PDF

Download DW-20-11-L-D-222 pdf datasheets and Samtec Inc. documentation for DW-20-11-L-D-222 - Samtec Inc..

HTML Datasheet
DW/EW/ZW Drawing Sheet 1.pdf DW,EW,ZW,HW Series Datasheet.pdf

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Samtec Inc.

DW-20-11-L-D-222

Samtec Inc.
98D-DW-20-11-L-D-222

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