Solar Modules
Quest Solar Bypass Diode Modules Overview
These modules are designed for solar bypass and forward applications, featuring a Module-09E plastic package with low reverse leakage and high forward surge current capability.
| Part Number | Device Type | Current (If) | Voltage(Vrrm) | Manufacturer | Compititor Product | Market Cross-Ref | Package | Datasheet | AEC-Q101 | Downloads |
|---|---|---|---|---|---|---|---|---|---|---|
|
CD30T45T
|
Schottky Bypass Diode
|
30A
|
45V
|
Vishay
|
VS-30CPQ045-N3
|
|
Module 09-E |
|
no
|
|
|
CD40T45T
|
Schottky Bypass Diode
|
40A
|
45V
|
STMicroelectronics
|
STPS4045CW
|
|
Module 09-E |
|
no
|
|
|
CD50T45T
|
Schottky Bypass Diode
|
40A
|
45V
|
Diotec Semiconductor
|
SBX4045-3G
|
|
Module 09-E |
|
no
|
|
|
CD50T45TD
|
Dual Schottky Bypass Diode
|
9A
|
45V
|
SMC Diode Solutions
|
90SQ045TA
|
|
Module 09-E |
|
no
|
|
Assembly and Internal Components of Schottky Module 09-E
Critical Mounting Instructions
To ensure long-term reliability and prevent thermal runaway, follow these mounting practices for the Module-09E package:
- Heatsink Requirement: At currents above 25A, external heat dissipation is mandatory. These modules are typically mounted to an aluminum heatsink or a cold plate within the solar junction box.
- Surface Preparation: The mounting surface must be flat (within 4 mils/inch) and free of burrs or scratches to minimize contact thermal resistance.
- Thermal Interface Material (TIM): Apply a thin, uniform layer (100–200 μm) of silicone thermal grease or use a thermal pad to fill microscopic air gaps between the module and the heatsink.
- Mounting Torque: Recommended Range: 0.4 Nm to 0.6 Nm (approx. 4–6 kgf·cm).
- Caution: Under-tightening increases thermal resistance, while over-tightening can deform the plastic package, lifting the internal die away from the base and causing “hot-spot” failures.
- Environmental Protection: Ensure the junction box is designed for easy heat dissipation, as internal temperatures can exceed 70°C in sunny conditions, potentially increasing leakage current and leading to junction meltdown
Applications
- Photovoltaic (PV) panels and arrays
- Solar charge controllers
- Inverters and power optimizers
- Battery backup and hybrid systems
- Off-grid solar installations
Cross Reference Table
| Quest Model | CDL Equivalent | Vishay Equivalent | STMicroelectronics Equivalent | ON Semiconductor Equivalent | Infineon Equivalent |
|---|---|---|---|---|---|
| SDM10A100 | CDL SDM10A100 | VS-10ETS12-M3 | STPS10H100 | MBR10100 | IDW10G120C5 |
| SDM20A200 | CDL SDM20A200 | VS-20ETS12-M3 | STPS20H100 | MBR20200 | IDW20G120C5 |
| SDM30A400 | CDL SDM30A400 | VS-30ETS12-M3 | STPS30H100 | MBR3045 | IDW30G120C5 |
| SDM50A600 | CDL SDM50A600 | VS-50ETS12-M3 | STPS50H100 | MBR5060 | IDW50G120C5 |
Cross references are for functional comparison only. Verify electrical and mechanical compatibility before substitution.
Technical Advantages
- Optimized for low leakage current and high thermal stability
- Compatible with crystalline and thin-film solar technologies
- Designed for high reliability under cyclic thermal stress
- Compliant with RoHS and REACH environmental standards
Why Choose Quest Semiconductors
With over 40 years of engineering heritage, Quest Semiconductors delivers advanced power semiconductor solutions trusted by renewable energy, automotive, and industrial sectors worldwide. The Solar Diode Module range combines proven reliability with cutting-edge design to meet the demands of modern solar energy systems.
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