Industrial / Heat Sinks
SRQ-XJ-18
The SRQ-XJ-18 is an industrial-grade heat sink designed to dissipate thermal energy from high-power electronic components. Manufactured by CZT with precision-extruded aluminum construction, it provides reliable passive cooling in compact form factors. Commonly used in power supplies, motor drives, and industrial control equipment.
Key Features
- Industrial-grade aluminum construction for reliable long-term thermal dissipation
- Precision-machined mounting surface ensures low contact thermal resistance
- Fin array design optimized for both natural and forced convection airflow
- Suitable for direct mounting of TO-247, TO-3P, and module packages
- Anodized finish improves emissivity and corrosion resistance in harsh environments
Key Specifications
- Product type: heat sink / thermal management component
- Application focus: optical transceiver, networking, power electronics, or industrial electronics thermal management
- Material: aluminum alloy reference; confirm final alloy, temper, and finish during RFQ
- Process note: confirm extrusion, die casting, CNC machining, skiving, bonding, or surface finishing from the customer drawing
- +3 more specs below
Request drawing: This product has local image and specification coverage. Ask sales to confirm the latest drawing revision before sampling or tooling review.
SRQ-XJ-18 Specifications
Product typeheat sink / thermal management component
Application focusoptical transceiver, networking, power electronics, or industrial electronics thermal management
Materialaluminum alloy reference; confirm final alloy, temper, and finish during RFQ
Process noteconfirm extrusion, die casting, CNC machining, skiving, bonding, or surface finishing from the customer drawing
Drawing statusRequest Drawing during RFQ; local PDF not available from the legacy archive
Asset statusOld-site product image available
RFQ checkconfirm dimensions, fin geometry, thermal interface, mounting method, surface finish, packaging, and drawing revision
Typical Applications
Power semiconductor cooling in industrial control panels
IGBT and MOSFET thermal management in inverter systems
DC-DC converter heat dissipation in automation equipment
Industrial battery charger power stage cooling
Embedded power supply thermal management
Frequently Asked Questions
Does the SRQ-XJ-18 support forced-air cooling in addition to passive operation?
Yes. The SRQ-XJ-18 fin geometry is compatible with both natural convection and forced-air cooling. Adding a fan significantly reduces thermal resistance, allowing higher power dissipation within the same footprint. CZT can provide thermal resistance curves for both operating modes.
What semiconductor package types are compatible with the SRQ-XJ-18 mounting surface?
The SRQ-XJ-18 accommodates common through-hole and surface-mount power packages including TO-247, TO-3P, and standard power module footprints. Custom drilling patterns are available for OEM orders requiring specific device layouts.
How does anodizing affect the thermal performance of the SRQ-XJ-18?
Anodizing increases surface emissivity from approximately 0.05 (bare aluminum) to over 0.8, meaningfully improving radiative heat transfer at elevated temperatures. It also provides a hard, corrosion-resistant surface that extends service life in humid or chemically active industrial environments.
SRQ-XJ-18 Details
CategoryIndustrial
SubcategoryHeat Sinks
Naming TemplateProduct name from catalog
BrandCZT
OriginChina
Drawing StatusRequest drawing
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Need a Custom Solution?
CZT offers OEM/ODM services with flexible MOQ. Contact our engineering team for custom connector solutions.