1. General Information & Product Identification:

· Product: Solid-State Relay (SSR)
· Manufacturer: Celduc Relais (France)
· Website: www.celduc.com
· Contact Information: Includes phone numbers and email addresses for sales and technical support in France, Europe, and Asia.

2. Model Number (Implied - Not Explicitly Stated but context suggests SKL20520):

· The document title mentions `SKL20520`. This is likely the model identifier.

3. Electrical Specifications (Key Values):

· Control Voltage: (Implied - Not directly specified, but a typical control voltage range would be assumed)
· Output Voltage: (Not explicitly stated; designed for AC loads)
· Output Current: 50A (Thyristor size) - *Limited by heatsink and circuit board*
· Surge Current (ITSM): Detailed graphs and values are provided showing non-repetitive surge current capability without and with voltage reapplied. These values are critical for determining safe application conditions.
· EMC Compliance: Conforms to EN60947-4-x and 5-1, pr EN61810-xxx. Includes testing immunity with VDR.
· UL Pending

4. Thermal Characteristics:

· Critical: SSR performance and current handling are heavily dependent on thermal management.
· Heatsinking is Essential: Current is limited by the heatsink and printed circuit board. The datasheet provides:
* Graphs of power dissipation versus RMS load current.
* Thermal resistance values (Rthj/c = 0.7 K/W).
* Guidance on heatsink selection.
· Ambient Temperature: Performance is affected by ambient temperature.
· Max Clip System: Celduc mentions the "Max Clip System" of Aavid Thermalloy, patented worldwide, suggesting a recommended heatsinking method.

5. Safety & Precautions:

· No Galvanic Isolation: SSR does *not* provide galvanic isolation between the mains (AC) and load.
· Varistor Requirement: An external Varistor (VDR) is required across the output (minimum size 14mm).

6. Mounting Examples:

· A diagram showing mounting dimensions with a key focus on the 9mm ± 0.15mm and 4mm isolating aspects.

7. Additional Information (Graphs & Tables):

· Surge Current Capability: Detailed graphs show the relationship between surge current (ITSM) and time.
· Long Duration Overload: Provides information on sustained overload current capabilities.
· Electrical Characteristics Chart (appears across multiple pages) – contains many important values but requires careful interpretation.



Overall Summary: This document provides technical details for a Celduc SSR model (likely SKL20520), emphasizing thermal management and safety precautions. Users must carefully review the thermal characteristics and implement appropriate heatsinking to avoid damage and ensure reliable operation. The requirement for an external VDR is also critical.