Industrial DC Solid State Relay 24VDC 80A–500A SSR HD06 Module
Industrial DC Solid State Relay 24VDC 80A–500A SSR HD06 Module
Industrial DC Solid State Relay — 24VDC Control, 80A to 500A
The SSR HD06 Series Industrial Solid State Relay delivers rock-solid DC-to-DC switching performance for demanding industrial automation, motor control, power distribution, and heavy-duty electrical applications. Available in multiple current ratings (80A, 100A, 120A, 150A, 200A, 300A, 400A, and 500A), this solid state relay is controlled by a 24VDC signal and handles DC load voltages up to 220V — making it a versatile choice for engineers, electricians, and systems integrators.
Unlike mechanical relays, this solid state module switches silently with no moving parts, dramatically reducing wear and extending service life in high-cycle environments. The robust construction is suited to industrial panels, CNC systems, battery management systems, and large-scale automation installations.
Made in Mainland China.
Key Features
- Wide Current Range: Choose from 80A, 100A, 120A, 150A, 200A, 300A, 400A, or 500A nominal ratings to match your application.
- DC Control Input: 24VDC control signal for easy integration with PLCs, microcontrollers, and industrial control systems.
- DC Load Output: Handles DC load voltages up to 220V for versatile industrial use.
- No Moving Parts: Silent, spark-free operation with extended service life compared to electromechanical relays.
- Customizable: Custom configurations available — contact us for bulk order lead times and special specifications.
- Compact, Panel-Mount Design: Easy installation in industrial enclosures and control panels.
Specifications
| Control Voltage | 24VDC |
| Load Voltage (Max) | 220V DC |
| Available Current Ratings | 80A / 100A / 120A / 150A / 200A / 300A / 400A / 500A |
| Switch Type | DC Control DC (DC-DC) |
| Condition | New |
| Customizable | Yes |
| Origin | Mainland China |
⚠️ Important Installation Notes
- Polarity: The positive pole (+) of the DC load power supply must be connected to the positive pole (+) of the solid state module. Reverse polarity will cause loss of control and prevent switching.
- Inductive Loads: When driving inductive loads (motors, solenoids, coils), a freewheeling diode must be connected in reverse-parallel across the load terminals to absorb reverse EMF generated at shutdown. Failure to do so may prevent the module from turning off and can damage the relay. Compatible freewheeling diodes: ZP50A/58 or ZP100A/58.
- Heat Sink Required: If your actual operating current exceeds 5A, a suitable heat sink must be installed to maintain safe operating temperatures and ensure long-term reliability.
Current Rating Selection Guide
The rated current printed on the module is the average on-state value, not the continuous RMS working current. Always select a module with adequate headroom based on your actual load type:
- Resistive loads: Actual current (A) × 2 to 2.5 = Recommended module rating (A)
- Inductive loads: Actual current (A) × 6 to 7 = Recommended module rating (A)
For more information on electrical safety practices for industrial control systems, refer to the OSHA Electrical Safety Guidelines.
Frequently Asked Questions
Q: What is the difference between the HD0680D, HD06100D, HD06120D, and HD06150D solid state relay models?
A: These model numbers refer to the nominal current rating of each SSR module in the HD06 series. The HD0680D is rated at 80A, the HD06100D at 100A, the HD06120D at 120A, and the HD06150D at 150A. All models share the same 24VDC control input and DC load voltage rating. Choose the model that, after applying the appropriate safety margin (2–2.5× for resistive loads, 6–7× for inductive loads), meets or exceeds your application's actual current requirements.
Q: Do I need a heat sink with this industrial solid state relay?
A: Yes — a heat sink is strongly recommended and required whenever the actual operating current exceeds 5A. Without adequate heat dissipation, the module can overheat and fail prematurely. Always size the heat sink appropriately for your current load and ambient temperature to ensure reliable, long-term operation.
Q: Can this DC solid state relay be used with inductive loads like motors or solenoids?
A: Yes, but with an important precaution: a freewheeling diode must be connected in reverse-parallel across the load terminals when driving inductive loads. This protects the relay module from the reverse voltage spike (back-EMF) produced when the inductive load is switched off. Suitable diodes include the ZP50A/58 or ZP100A/58. Omitting this component can prevent the relay from switching off correctly and may permanently damage the module.
Q: Is bulk ordering available for the SSR HD06 series solid state relays?
A: Yes. Standard models are typically available in stock for immediate dispatch. For large volume orders, please contact customer service with your required quantity so delivery lead times can be confirmed before purchase.