aluminum heat sink plate: copper-alloy CuZn37, tolerance 0.15 mm, surface hard anodize Type III, 25-40 µm, lead time 12 working days, MOQ 1000 pcs. Capacity 50,000 pcs for switch-mode power supply. Drawing review and first-article report included.
aluminum heat sink plate
Key Takeaway
Aluminum heat sink plate is specified with 1050A aluminium, 0.3 mm fin thickness, 1.5 mm fin pitch, and 0.85 K/W thermal resistance. General tolerance is ±0.10 mm, held at production speed after fixing material condition and tooling geometry. Zinc-nickel plating with trivalent passivation is standard. Cost pressure comes from deburring, plating, and 100% inspection, not raw material, so removing one secondary step moves unit cost more than material substitution.
Key Takeaway
Aluminum heat sink plate is specified with 1050A aluminium, 0.3 mm fin thickness, 1.5 mm fin pitch, and 0.85 K/W thermal resistance. General tolerance is ±0.10 mm, held at production speed after fixing material condition and tooling geometry. Zinc-nickel plating with trivalent passivation is standard. Cost pressure comes from deburring, plating, and 100% inspection, not raw material, so removing one secondary step moves unit cost more than material substitution.
aluminum heat sink plate sits at the intersection of three constraints that rarely agree: dimensional stability, unit cost, and delivery time. This page breaks down how we resolve them in production rather than in a brochure.
Key Specifications at a Glance
| Parameter | Value / Range |
|---|---|
| Material | 1050A aluminium |
| Fin thickness | 0.3 mm |
| Fin pitch | 1.5 mm |
| Thermal resistance | 0.85 K/W |
| Surface finish | zinc-nickel plating, trivalent passivation |
| General tolerance | ±0.10 mm |
Market and Technical Context
Cost pressure in VFD and inverter rarely comes from the raw material. It comes from secondary operations: deburring, plating, and 100% inspection. Removing one of those steps usually moves unit cost more than any material substitution.
Tariff and logistics uncertainty has made regional qualification a priority in VFD and inverter. Buyers increasingly ask for a second qualified source, which changes how aluminum heat sink plate is specified and how tolerances are documented.
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How We Manufacture It
The route for aluminum heat sink plate starts with a process window, not a machine. We fix material condition and tooling geometry first, then confirm that ±0.10 mm is held at production speed rather than on a single slow part.
Heat treatment and surface treatment are scheduled as controlled steps, not afterthoughts. zinc-nickel plating, trivalent passivation is applied to a defined thickness range and verified, because variation here causes more field failures than dimensional drift.
Final inspection for aluminum heat sink plate is sampling-based for general dimensions and 100% for critical features. The split is agreed before tooling, because moving a feature from general to critical changes cost and 20 working days.
Material and Surface Finish
Material condition matters as much as grade. 1050A aluminium supplied in the wrong temper will drift after machining, which is why aluminum heat sink plate is stress-relieved before finishing when the geometry is asymmetric.
Surface specification for aluminum heat sink plate is zinc-nickel plating, trivalent passivation, chosen for the service environment in VFD and inverter. Thickness is verified on a reference coupon from the same batch rather than assumed from process settings.
Recycled content and RoHS/REACH declarations are available for aluminum heat sink plate on request. If your VFD and inverter customer audits material origin, ask for the mill certificate at quote stage, not at delivery.
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Tolerance and Inspection
General dimensions on aluminum heat sink plate are held to ±0.10 mm; critical features are identified on the drawing and controlled separately with a tighter band.
Process capability is tracked per feature. Where Cpk falls below the agreed threshold on aluminum heat sink plate, we either adjust the process or reclassify the feature, rather than sorting parts at the end.
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Non-conforming material is quarantined physically, not just in the system. For aluminum heat sink plate, that means the batch stays in a marked area until disposition is documented, which prevents the most common shipping error.
Where It Is Used
Service environment drives more redesigns than load does. aluminum heat sink plate in outdoor or washdown service needs zinc-nickel plating, trivalent passivation and sealing considered at design stage, not added later.
Further technical detail: Heat Sink vs Radiator in Electronics: Key Differences Explained.
Vibration and cycling are the usual life limiters for aluminum heat sink plate. If the duty cycle is known, we can recommend a surface treatment and hardness combination that extends service life without changing dimensions.
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What to Confirm Before Ordering
Ask for the first-article report before you ask for a price cut on aluminum heat sink plate. A supplier who cannot produce dimensional data at 1000 pcs will not produce it at 120,000 pcs.
Confirm the reorder path. If aluminum heat sink plate is documented with tooling drawings and a first-article report on file, a repeat order years later reproduces the original part instead of approximating it.
FAQ: Your Questions Before Ordering
What is the minimum order quantity for aluminum heat sink plate?
Prototype quantities start well below production minimums. Production runs for aluminum heat sink plate start at 1000 pcs, which is where the process window is proven and unit cost stabilises.
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Can you work from our existing drawing?
Standard lead time for aluminum heat sink plate is 20 working days after drawing approval and tooling sign-off. Prototypes are typically faster because they bypass tooling, and repeat orders are faster still because tooling exists.
Do you provide material and inspection certificates?
Yes. Material certificates, heat-lot traceability, and first-article inspection reports ship with the order. If your VFD and inverter customer requires additional documentation, specify it at quote stage.
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What surface finishes are available for aluminum heat sink plate?
zinc-nickel plating, trivalent passivation is standard for aluminum heat sink plate. Other finishes are quoted with a defined thickness range and verified on a coupon from the same batch rather than assumed from process settings.
How do you handle a design change mid-program?
Changes are documented against the original first-article report. We identify which dimensions are affected, requote only the affected operations, and tell you whether existing stock of aluminum heat sink plate remains usable.
Send the drawing and the annual volume. You will get a manufacturability review, a process route, and a quote that states ±0.10 mm, 20 working days, and 1000 pcs explicitly rather than by implication.
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Further technical detail: Vapor Chamber vs Heat Pipe vs Solid Heat Sink: Key Engineering Differences.
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Key Specifications and Selection Guide
Spec comparison
| Parameter | Value / Range |
|---|---|
| Material | 1050A aluminium |
| Tolerance | ±0.10 mm |
| Lead time | Confirm at order; standard production after process window and tooling geometry are fixed |
| MOQ | Confirm at order; driven by tooling and secondary operation setup |
| Capacity | Production speed validated for ±0.10 mm before release |
Selection / comparison
| Option | Best for | Trade-off |
|---|---|---|
| Zinc-nickel plating with trivalent passivation | Corrosion resistance and stable thermal interface | Adds plating cost and lead time versus bare aluminium |
| Bare 1050A aluminium | Cost-sensitive VFD and inverter plates where corrosion is controlled | No plating protection; surface finish and corrosion resistance are lower |
| 0.3 mm fin thickness at 1.5 mm pitch | Compact heat sink plate with 0.85 K/W thermal resistance | Thin fins require controlled tooling and handling to avoid deformation |
| ±0.10 mm general tolerance | Assembly fit and repeatable mounting in VFD and inverter builds | Tighter than typical commercial tolerance; requires production-speed validation |
| 100% inspection | High-reliability orders where every plate must be documented | Increases unit cost and delivery time versus sampling |
Process / inspection
| Stage | Control | Record |
|---|---|---|
| Material condition | Fix 1050A aluminium condition before machining | Material certificate and incoming inspection log |
| Tooling geometry | Fix fin thickness 0.3 mm and fin pitch 1.5 mm before production | Tooling setup sheet and first-article approval |
| Production speed | Confirm ±0.10 mm is held at production speed, not only on a single slow pass | In-process dimensional check and SPC record |
| Deburring | Remove burrs from fins and edges without changing fin geometry | Deburring operation sign-off and visual inspection record |
| Plating | Zinc-nickel plating with trivalent passivation | Plating thickness and passivation record |
| Final inspection | Verify general tolerance ±0.10 mm and thermal resistance 0.85 K/W where required | Inspection report and traceability record |
Frequently Asked Questions
What is the thermal resistance of this aluminum heat sink plate?
The standard aluminum heat sink plate has a thermal resistance of 0.85 K/W with 0.3 mm fin thickness and 1.5 mm fin pitch. This value is tied to the 1050A aluminium material and the fixed tooling geometry. Confirm your airflow and mounting conditions before ordering, because thermal resistance changes with application.
What tolerance can you hold on aluminum heat sink plate?
General tolerance is ±0.10 mm. We fix material condition and tooling geometry first, then confirm that ±0.10 mm is held at production speed rather than on a single slow pass. If your assembly requires tighter tolerances, confirm before ordering because inspection and secondary operations may change.
Why does aluminum heat sink plate cost more than raw material suggests?
Cost pressure in VFD and inverter rarely comes from raw material. It comes from secondary operations: deburring, plating, and 100% inspection. Removing one of those steps usually moves unit cost more than any material substitution. For example, switching from 100% inspection to sampling can reduce cost, but confirm risk before changing.
What surface finish do you recommend for aluminum heat sink plate?
Zinc-nickel plating with trivalent passivation is the standard surface finish for this aluminum heat sink plate. It supports corrosion resistance and stable thermal interface in VFD and inverter use. If you need bare 1050A aluminium, confirm because corrosion protection and surface finish will be lower.
Can you provide a second qualified source for aluminum heat sink plate?
Tariff and logistics uncertainty has made regional qualification a priority in VFD and inverter. Buyers increasingly ask for a second qualified source, which changes how aluminum heat sink plate is specified and how tolerances are documented. We can support this by fixing material condition, tooling geometry, and inspection records for both sources.
What should I confirm before ordering aluminum heat sink plate?
Confirm material 1050A aluminium, fin thickness 0.3 mm, fin pitch 1.5 mm, thermal resistance 0.85 K/W, surface finish zinc-nickel plating with trivalent passivation, and general tolerance ±0.10 mm. Also confirm lead time, MOQ, inspection level, and whether you need a second qualified source. These details affect unit cost and delivery time.
How do you inspect aluminum heat sink plate for VFD and inverter use?
We inspect material condition, tooling geometry, and production speed before release. We verify ±0.10 mm general tolerance, fin thickness 0.3 mm, fin pitch 1.5 mm, and thermal resistance 0.85 K/W where required. Deburring and zinc-nickel plating with trivalent passivation are recorded. Final inspection reports support traceability for VFD and inverter orders.
Key Specifications and Selection Guide
Spec comparison
| Parameter | Value / Range |
|---|---|
| Material | 1050A aluminium |
| Tolerance | ±0.10 mm |
| Lead time | Standard production lead time after tooling and material condition fixed |
| MOQ | Standard production MOQ for custom heat sink plates |
| Capacity | Production speed with fixed material condition and tooling geometry |
Selection / comparison
| Option | Best for | Trade-off |
|---|---|---|
| 1050A aluminium with zinc-nickel plating | VFD and inverter thermal management | Plating and 100% inspection add cost |
| 1050A aluminium with trivalent passivation | Corrosion resistance with standard finish | Secondary plating step remains |
| 0.3 mm fin thickness, 1.5 mm fin pitch | 0.85 K/W thermal resistance targets | Deburring and inspection drive unit cost |
| General tolerance ±0.10 mm | Production speed after tooling geometry fixed | Requires stable material condition |
| Remove one secondary step | Lower unit cost than material substitution | May affect deburring, plating, or inspection scope |
Frequently Asked Questions
What is the thermal resistance of this aluminum heat sink plate?
The specified thermal resistance is 0.85 K/W with 1050A aluminium, 0.3 mm fin thickness, and 1.5 mm fin pitch. This combination is set for VFD and inverter cooling where dimensional stability, unit cost, and delivery time must agree. Confirm your airflow and mounting conditions before ordering.
What tolerance can you hold at production speed?
General tolerance is ±0.10 mm, held at production speed after fixing material condition and tooling geometry. The 0.3 mm fin thickness and 1.5 mm fin pitch are controlled within this tolerance. Tighter tolerances require review because they may add inspection or secondary operations.
What surface finish is standard for the aluminum heat sink plate?
Zinc-nickel plating with trivalent passivation is standard. This finish supports corrosion resistance for VFD and inverter use. Plating is one of the secondary operations that drives cost, so changing finish should be evaluated against thermal and corrosion requirements.
Why does cost pressure come from deburring, plating, and inspection?
Raw material is not the main cost driver. Deburring, plating, and 100% inspection are the secondary operations that move unit cost. Removing one of those steps usually moves unit cost more than any material substitution, so review the inspection and finish scope before changing alloy.
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What should I confirm before ordering aluminum heat sink plates?
Confirm material condition, tooling geometry, fin thickness 0.3 mm, fin pitch 1.5 mm, thermal resistance 0.85 K/W, tolerance ±0.10 mm, and surface finish zinc-nickel plating with trivalent passivation. Also confirm whether deburring, plating, and 100% inspection are required, because these drive unit cost and lead time.
Can you remove one secondary step to reduce unit cost?
Cost pressure comes from deburring, plating, and 100% inspection, not raw material. Removing one secondary step usually moves unit cost more than material substitution. However, removing deburring, plating, or inspection may affect fit, corrosion resistance, or traceability, so the change must be reviewed against the application.
What is the lead time and MOQ for custom aluminum heat sink plates?
Lead time and MOQ depend on material condition and tooling geometry. Once those are fixed, production runs at speed with general tolerance ±0.10 mm. Confirm your required fin thickness 0.3 mm, fin pitch 1.5 mm, and surface finish before quoting, because secondary operations affect both schedule and minimum order quantity.
