SSR Heat Sinks Selection Guide: Technical Criteria & Application Standards
SSR Heat Sinks selection guide: technical parameters, mounting and compliance standards, and Enda, Isıso comparison.
An SSR heat sink is a cooling profile that is screwed to the metal base of a solid state relay and transfers the heat generated in the semiconductor to the air through its fins. Because the relay produces heat that rises with load current while conducting, it is used to run SSRs that drive heating loads such as ovens and resistive heaters close to their rated current. This category includes Enda ETS series fanless and fan-cooled heat sinks and Isıso ISS series DIN rail-mounted models made for single-phase and three-phase, 25 A, 40 A and 75 A SSRs. Select the heat sink according to the load current of the SSR, the single-phase or three-phase housing type, the ambient temperature inside the panel, whether fan or natural cooling is needed, and the mounting style. The manufacturer's current versus ambient temperature curve shows how many amperes the same relay can carry with which heat sink; for fan-cooled models, also account for the fan supply. An SSR heat sink is not a substitute for a panel fan or a panel air conditioner; it transfers heat from the relay into the panel, and the temperature inside the panel must be reduced separately by ventilation or air conditioning. The SSR Heat Sinks category on Welibaba includes 14 active models from leading manufacturers such as Enda, Isıso.
Key Technical Parameters for Selecting SSR Heat Sinks
To specify the right SSR Heat Sinks model for your panel or installation, verify the following parameters against your engineering schedule:
| Parameter | Typical Catalog Values | Verification Note |
|---|---|---|
| Mounting Type | Ray montajlı, Ray ve panel montajlı | Verify against project schedule and load calculation |
| Compatible Product | EPxA1 ve EPxA3 serisi panel montajlı solid state röleler | Verify against project schedule and load calculation |
| Housing Dimensions (W×H×D) | 46x61x100 mm, 46x61x110 mm, 46x61x62 mm, 46x61x80 mm | Verify against project schedule and load calculation |
| Thermal Resistance | 0, 34 °C/W, 0, 4 °C/W | Verify against project schedule and load calculation |
Installation, Compatibility, and Commissioning Checklist
- Electrical & Mechanical Matching: Confirm that rated voltage, current capacity, and mounting dimensions align with the upstream and downstream components in Solid State Relay Accessories.
- Environmental & Enclosure Rating: Check IP protection class, housing material, and terminal capacity for dusty, humid, or high-vibration industrial environments.
- Related Product Groups: If your application calls for a different form factor or rating, compare sibling categories such as Solid State Relay Accessories.
Frequently Asked Questions
What is the first parameter to check when selecting SSR Heat Sinks?
Start by confirming the circuit's rated electrical values and physical mounting dimensions, then use the technical attribute filters on the SSR Heat Sinks page to narrow down compatible series.
Which SSR Heat Sinks brands are available on Welibaba?
Welibaba currently stocks 14 active models in this category from manufacturers including Enda, Isıso, complete with verified specifications and unit pricing.
How can I compare SSR Heat Sinks models by manufacturer part number?
You can search directly by manufacturer SKU/order code or use the category filter panel to compare equivalent models across brands side by side.