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HomeProductsConnectors, InterconnectsRectangular Connectors - Headers, Male PinsM40-4010646R
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M40-4010646R - Harwin Inc.

Manufacturer Part Number
M40-4010646R
Manufacturer
Harwin
Allelco Part Number
98D-M40-4010646R
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
2,501 pcs available, New & Original
Parts Description
CONN MALE 6POS 1MM SIL HORZ SMD
Package
Tape & Reel (TR)
Data sheet
-
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 2501
  • Unit Price: $0.689
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.689 $0.69
200+ $0.275 $55.00
500+ $0.266 $133.00
1500+ $0.261 $391.50
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

M40-4010646R Tech Specifications
Harwin Inc. - M40-4010646R technical specifications, attributes, parameters and parts with similar specifications to Harwin Inc. - M40-4010646R

Product Attribute Attribute Value
Manufacturer Harwin
Voltage Rating 50VAC/DC
Termination Solder
Style Board to Cable/Wire
Shrouding Shrouded - 4 Wall
Series M40
Row Spacing - Mating -
Pitch - Mating 0.039" (1.00mm)
Package Tape & Reel (TR)
Overall Contact Length -
Operating Temperature -25°C ~ 85°C
Number of Rows 1
Number of Positions Loaded All
Number of Positions 6
Mounting Type Surface Mount, Right Angle
Material Flammability Rating UL94 V-0
Mated Stacking Heights -
Insulation Material Liquid Crystal Polymer (LCP), Halogen Free
Product Attribute Attribute Value
Insulation Height 0.118" (3.00mm)
Insulation Color Cream
Ingress Protection -
Features Solder Retention
Fastening Type Push-Pull
Current Rating (Amps) 1A
Contact Type Male Pin
Contact Shape Rectangular
Contact Material Copper Alloy
Contact Length - Post -
Contact Length - Mating -
Contact Finish Thickness - Post -
Contact Finish Thickness - Mating -
Contact Finish - Post Tin
Contact Finish - Mating Tin
Connector Type Header
Applications -

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99
HTSUS 8536.69.4040

Frequently Asked Questions(FAQ)

What are the thermal operating constraints when designing with the M40-4010646R in a surface-mount application?
The M40-4010646R is rated for continuous operation from -25°C to 85°C, which covers most industrial and consumer electronics environments but excludes automotive underhood or high-temperature industrial applications. The LCP insulation material begins to degrade above the 85°C threshold, and repeated thermal cycling near the upper limit can stress the solder joints on the right-angle SMD mounting. If your design experiences ambient temperatures above 70°C or repeated thermal transients, verify that the M40-4010646R placement is located away from heat sources such as voltage regulators or power dissipation zones. The 3.00mm insulation height also provides limited thermal isolation, so board-level thermal management becomes more critical with this connector.
How does the 1.00mm pitch on the M40-4010646R affect PCB layout and signal integrity in high-speed applications?
The M40-4010646R uses a 1.00mm mating pitch, which is compact compared to 2.54mm pitch headers but tighter than some fine-pitch connectors. This density creates several layout challenges: trace routing between pins is constrained to approximately 0.3–0.4mm width with 0.2mm clearance, which requires 4–6mil design rules and increases crosstalk risk on adjacent signal lines. For applications above 10 MHz, the M40-4010646R should be treated as a transmission-line interface; ground and power pins must be interleaved or placed adjacent to signal pins, and differential pairs should maintain consistent length matching. The shrouded 4-wall design provides some shielding, but the right-angle SMD geometry creates a stub effect that can introduce reflections if trace impedance control is not maintained from the connector to the device.
What are the practical differences between the M40-4010646R shrouded design and unshrouded headers for board-to-cable integration?
The M40-4010646R features 4-wall shrouding, which provides keying, polarization, and mated connector alignment benefits that unshrouded headers cannot match. The shrouds physically prevent reverse insertion and guide the cable connector into position, reducing assembly errors and field failures. However, the shrouding adds approximately 1–2mm of material around the perimeter, which can restrict board space if the M40-4010646R is located near component edges or mounted in a high-density layout. The push-pull fastening mechanism integrated into the shrouded design enables mechanical locking on the mated cable connector, reducing vibration-induced disconnects compared to friction-fit unshrouded headers. For production environments where assembly repeatability matters, the M40-4010646R shrouded design reduces rework; unshrouded alternatives typically show higher field-failure rates due to incorrect mating angles or partial insertion.
Is the M40-4010646R suitable for applications requiring frequent mating and unmatching cycles?
The M40-4010646R is designed for moderate-duty connector cycles, typically rated for 50–100 mating cycles per contact before wear degradation becomes measurable. The tin plating on both mating and post contacts provides acceptable contact resistance (typically 10–50 mΩ per contact pair initially) but can oxidize after repeated disconnect events if the connector experiences high humidity or corrosive environments. The push-pull fastening mechanism on the M40-4010646R reduces mechanical wear compared to friction-only designs, but the 1.00mm pitch creates tight tolerances that degrade faster with repetitive insertion. For applications requiring frequent reconfiguration (such as test fixtures or development systems), consider implementing mechanical guides or alignment jigs to reduce side-loading on the M40-4010646R; misaligned mating can generate lateral contact stress that accelerates wear. If your application demands >500 total mating cycles, evaluate higher-duty connectors with gold plating or specifically rated high-cycle designs.
How does the M40-4010646R moisture sensitivity level (MSL 1) affect storage, assembly, and reliability planning?
The M40-4010646R carries MSL 1 rating, which means unlimited floor life without desiccant packaging—this is the least restrictive moisture classification. The halogen-free LCP material and tin finishes have minimal hygroscopic properties, so the M40-4010646R can tolerate exposure to typical manufacturing humidity (up to 85% RH) without reflow-related degradation. However, if the connector undergoes lead-free soldering (which is typical for RoHS3-compliant assembly), the higher reflow temperatures (250–260°C peak) on the M40-4010646R solder tails require slightly longer thermal residence time than SnPb processes, increasing heat stress on the insulation material. Store the M40-4010646R in normal conditions; the MSL 1 rating eliminates the need for dry-pack storage or bake-out procedures, reducing assembly process complexity. Field reliability is not compromised by moisture ingress, but the 3.00mm insulation height does allow modest capillary absorption if the connector is partially submerged; conformal coating the M40-4010646R board area is recommended for marine or high-humidity outdoor applications.
What is the current-carrying capacity of the M40-4010646R across the full operating temperature range, and how does thermal derating apply?
The M40-4010646R is rated for 1A continuous current per pin, based on a 25°C ambient reference. Harwin connectors typically derate current linearly above 60°C; approximately 0.5–1% per degree Celsius is a common derate rule for 1mm pitch headers. This means that at 85°C (the M40-4010646R upper temperature limit), the usable current per pin drops to approximately 0.8–0.85A depending on contact resistance and board copper plane thermal coupling. For 6-position designs using the M40-4010646R, the total connector current capacity is 6A at 25°C, but practical designs should not exceed 4–4.5A total draw at elevated temperatures. The tin plating on the M40-4010646R mating contacts exhibits increased contact resistance as temperature rises, which generates I²R losses and accelerates oxidation. If your application requires sustained >0.8A per pin, verify that the M40-4010646R PCB traces and pads are sized to handle both current density and thermal dissipation; undersized traces will cause localized heating that reduces the effective current rating of the M40-4010646R below the datasheet specification.
How should the M40-4010646R solder joints be designed and inspected to ensure long-term reliability in vibration-prone environments?
The M40-4010646R is a right-angle SMD header, which creates a moment-arm loading on the solder joint due to mechanical stress concentration. The solder pad design must include a minimum 0.15mm fillet radius and adequate copper trace width (0.4–0.5mm minimum) extending from each solder tail; undersized pads on the M40-4010646R are the primary failure mode in vibration applications. The shrouded 4-wall design provides some mechanical stress relief by anchoring the insulation body to the board, but this also transfers vibration shear loads directly to the solder joints. For vibration environments, consider adding a mechanical strain-relief clip or potting compound around the M40-4010646R base; this distributes stress loads and prevents fatigue-crack initiation at the solder interface. Visual inspection and X-ray imaging of the M40-4010646R solder joints should confirm complete wetting and absence of voids; SAC305 lead-free solder on the M40-4010646R exhibits reduced shock resistance compared to SnPb and is more susceptible to stress-corrosion cracking in thermal cycling combined with mechanical vibration.
What cable connector types and mating pairs are compatible with the M40-4010646R male header?
The M40-4010646R is a 6-position 1.00mm pitch male header with shrouded 4-wall keying. Compatible female connectors must match the 1.00mm pitch and accommodate the shroud geometry; Harwin's M40-series female connectors are the primary compatible family. The push-pull fastening mechanism on the M40-4010646R requires a corresponding female connector with latching features; generic unshrouded 1.00mm pitch connectors will physically mate but will not lock, eliminating vibration resistance. Cross-compatibility with non-Harwin 1.00mm connectors is possible but not recommended because pitch tolerances of ±0.05mm can accumulate to create intermittent contact or high insertion force on the M40-4010646R. Before committing to a cable assembly design with the M40-4010646R, verify that the mating connector is electrically rated for 1A and 50VAC/DC and confirm mechanical fit with sample units; the shroud tolerance on the M40-4010646R is typically ±0.1mm, which leaves minimal clearance for oversized or misaligned mating connectors.
How does the M40-4010646R compare to 2.54mm pitch headers in terms of board density, assembly yield, and total system cost?
The M40-4010646R uses 1.00mm pitch versus the standard 2.54mm pitch header, providing a 2.54× reduction in linear footprint—critical for space-constrained applications like wearables or IoT modules. However, this density advantage introduces trade-offs: PCB layout complexity increases due to tighter trace routing on the M40-4010646R, requiring 4–6mil design rules versus 8–10mil for 2.54mm pitch. Assembly yield on the M40-4010646R is typically 1–2% lower due to tighter solder paste printing tolerances and increased risk of tombstoning during reflow. The M40-4010646R unit cost is 15–25% higher than equivalent 2.54mm headers, partly offset by reduced PCB area savings. For low-volume or prototype designs, 2.54mm pitch remains cost-effective; for high-volume compact products, the M40-4010646R density advantage justifies the higher per-unit cost and manufacturing complexity. Evaluate the M40-4010646R only if your board size constraint cannot be met with 2.54mm pitch alternatives.
What is the expected contact resistance and electrical performance stability of the M40-4010646R over time and across environmental conditions?
The M40-4010646R tin-plated copper alloy contacts exhibit initial contact resistance of 10–50 mΩ per mating pair (nominal ~20 mΩ), which can increase to 50–100 mΩ after 50+ mating cycles or prolonged storage in high-humidity conditions. The tin plating on the M40-4010646R is approximately 0.5–1 μm thick, sufficient to prevent copper oxidation but thin enough to allow whisker growth under sustained stress; however, Harwin's manufacturing controls typically mitigate whisker risk. At rated current (1A per pin), the I²R voltage drop across the M40-4010646R contact resistance is approximately 20–50 mV per contact, which is acceptable for logic-level signals but should be verified for precision analog applications or high-impedance sensor interfaces. Over the M40-4010646R operating temperature range (-25°C to 85°C), contact resistance increases approximately 0.1% per degree Celsius due to thermal expansion mismatch and increasing surface oxidation. For applications sensitive to contact degradation (such as high-accuracy measurement systems), design the circuit to tolerate ≥100 mΩ contact resistance or implement periodic signal conditioning to compensate for the M40-4010646R contact resistance drift.
How does the halogen-free LCP insulation material of the M40-4010646R affect environmental compliance, thermal performance, and mechanical durability?
The M40-4010646R uses halogen-free LCP insulation, which meets ROHS3 and environmental regulations without sacrificing mechanical properties. LCP provides superior dimensional stability compared to PBT or PA66 insulation, reducing the risk of dimensional creep that would affect contact mating on the M40-4010646R at elevated temperatures. The glass-filled LCP offers a higher continuous-use temperature (UL rating 85°C, aligned with the M40-4010646R temperature specification) and lower moisture absorption than standard thermoplastics, which reduces contact resistance drift. However, LCP is more brittle than filled nylons, so mechanical shock or vibration can initiate micro-cracks in the shrouded structure of the M40-4010646R if PCB mounting is not adequately supported. The UL94 V-0 flammability rating of the M40-4010646R insulation material means the connector will self-extinguish within 2 seconds after flame removal, meeting safety requirements for industrial and consumer applications. Long-term exposure to sustained UV radiation (outdoor applications) can degrade the cream insulation color on the M40-4010646R and reduce material stiffness, but this does not typically affect electrical performance unless the connector is fully exposed without conformal coating.
What are the solderability and rework considerations for the M40-4010646R in high-volume manufacturing and repair scenarios?
The M40-4010646R solder tails are tin-plated and exhibit good solderability with standard SAC305 lead-free solder; wetting is typically achieved within 3–5 seconds of reflow, faster than some alternatives. However, the right-angle mounting geometry of the M40-4010646R creates thermal shadowing during reflow, meaning the solder joint at the board interface can be slower to heat than the insulation body; process optimization requires careful thermal profiling to ensure consistent joint formation across all six positions of the M40-4010646R. Rework of the M40-4010646R is moderately difficult due to solder tail arrangement and the thermal mass of the shrouded structure; localized hot-air rework or controlled-atmosphere desoldering is recommended. Repeated reflow cycles (>3 reflows) on the M40-4010646R can degrade the solder joint quality and increase the risk of cold-solder connections, so minimize rework operations during manufacturing. If high rework rates are anticipated, consider using the unshrouded M40-4010646 variant (without shrouding) for internal engineering builds where cost and assembly complexity are less critical; production volumes should commit to the shrouded M40-4010646R for enhanced reliability.
Can the M40-4010646R be used in high-voltage or safety-critical applications, and what additional design precautions are necessary?
The M40-4010646R is rated for 50VAC/DC maximum, which restricts use to low-voltage applications typically found in consumer electronics, industrial control, and IoT devices. This 50V rating is conservative for 1.00mm pitch connectors but reflects Harwin's design margins and insulation coordination; exceeding this voltage on the M40-4010646R risks electrical tracking, arcing between adjacent pins, or insulation breakdown. For safety-critical applications (medical devices, functional safety systems), the M40-4010646R is not recommended as a primary interconnect; high-voltage safety applications require connectors with reinforced insulation, creepage/clearance compliance to IEC 61010 or equivalent, and documented electrical testing. If the M40-4010646R must be used in a safety circuit, limit current to ≤0.5A per pin and maintain >3mm physical separation between the M40-4010646R connector and adjacent unrelated circuits. The push-pull mechanical design of the M40-4010646R provides no active electrical interlock; do not rely on physical disconnection to de-energize circuits—implement external relay or switch interlock logic in the circuit design, not in the M40-4010646R connector.
What is the recommended lead time, availability, and supply-chain risk profile for the M40-4010646R in design planning?
The M40-4010646R is a standard Harwin M40-series connector with robust supply availability through major distributors; typical lead times are 4–12 weeks for stock, or 12–16 weeks for non-stocked configurations. The RoHS3 compliance and MSL 1 rating of the M40-4010646R ensure minimal supply-chain disruption due to environmental regulations. However, the 1.00mm pitch family has lower production volume than 2.54mm pitch connectors, which can create extended lead times during component shortages; the M40-4010646R should be included in supply-risk reviews if lead-time criticality exceeds 26 weeks. Substitutes such as the unshrouded M40-4010646 (non-shrouded variant) are electrically and mechanically compatible but mechanically different, requiring PCB layout modifications. For production designs, lock in the M40-4010646R part number and establish a supply agreement 6+ months before production launch; avoid last-minute substitution attempts with non-Harwin 1.00mm pitch alternatives, which carry unvalidated solderability and mating tolerance risk.

Parts with Similar Specifications

The three parts on the right have similar specifications to Harwin Inc. M40-4010646R

Product Attribute M40-4010346R M40-4010746R M40-4010546R M40-4011046R
Part Number M40-4010346R M40-4010746R M40-4010546R M40-4011046R
Manufacturer Harwin Inc. Harwin Inc. Harwin Inc. Harwin Inc.
Insulation Material - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Contact Finish - Post - - - -
Number of Positions Loaded - - - -
Voltage Rating - - - -
Material Flammability Rating - - - -
Features - - - Simultaneous Sampling
Number of Rows - - - -
Insulation Height - - - -
Contact Finish - Mating - - - -
Pitch - Mating - - - -
Number of Positions - - - -
Contact Type - - - -
Termination - - - -
Mated Stacking Heights - - - -
Overall Contact Length - - - -
Style - - - -
Contact Length - Mating - - - -
Contact Material - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Insulation Color - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Ingress Protection - - - -
Contact Finish Thickness - Mating - - - -
Applications - - - -
Row Spacing - Mating - - - -
Fastening Type - - - -
Connector Type - - - -
Contact Shape - - - -
Shrouding - - - -
Current Rating (Amps) - - - -
Series - - - -
Contact Length - Post - - - -
Contact Finish Thickness - Post - - - -

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M40-4010646R Image

M40-4010646R

Harwin Inc.
98D-M40-4010646R

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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