📋 Overview
The EM-48S2410Z is a rugged, industrial-grade DC-DC step-down (buck) converter that takes a wide 30-60V DC input — perfect for 36V and 48V battery systems, solar arrays, or vehicle electrical systems — and delivers a clean, regulated 24V DC output at up to 10A (240W).
Inside, the module uses a non-isolated buck conversion topology, meaning the input and output share a common negative (ground) reference. This keeps the design compact and highly efficient (96% typical), but it also means the input and output are electrically connected — something to keep in mind when wiring your system.
What sets this converter apart is its build quality: an epoxy-sealed, IP67 waterproof aluminum housing, a -40°C to +50°C ambient operating range, and full protection against overload, short circuit, over-temperature, and under-voltage conditions. Whether you're powering 24V accessories from a 48V forklift battery, running LED lighting from a 36V solar bank, or supplying 24V industrial controls from a 48V DC bus, this module is built to handle it reliably — even outdoors or in wet/dusty environments.
⭐ Key Features
- Wide 30-60V Input Range — Works directly from 36V or 48V nominal battery and power systems without extra regulation.
- 96% Typical Efficiency — Minimizes heat buildup and wasted power, even at full 240W load.
- IP67 Waterproof Housing — Epoxy-sealed aluminum case resists dust, moisture, and splashing water.
- Full Protection Suite — Built-in overload, short-circuit (hiccup mode), under-voltage, and over-temperature protection with automatic recovery.
- Fanless, Maintenance-Free Cooling — Natural convection cooling means no moving parts to fail or service.
- Industrial-Grade Reliability — 100% full-load burn-in tested with a rated MTBF of over 200,000 hours.
📊 Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | EM-48S2410Z |
| Input Voltage Range | 30-60V DC (36V/48V nominal systems) |
| Maximum Peak Input Voltage | 63V DC |
| Output Voltage | 24V DC (±5% accuracy), 23.75-24.35V @ 48Vin/10A |
| Output Current | 0-10A continuous |
| Output Power | 240W maximum |
| Efficiency | 96% typical (@ 48Vin, 10A, 25°C) |
| Voltage Regulation / Load Regulation | ±3% / ±3% |
| Output Ripple & Noise | 180mV p-p typical, 300mV p-p maximum (20MHz bandwidth) |
| Maximum Input Current | 8.2A (@ 30V input, 10A output) |
| No-Load Current | 50mA typical, 70mA maximum (@ 48Vin) |
| Built-In Input Fuse | 20A (on input positive lead) |
| Under-Voltage Shutdown / Recovery | 28.5V shutdown / 29.5V auto-recovery (typical) |
| Overcurrent Protection | 15-22A trip range, hiccup mode with auto-recovery |
| Over-Temperature Protection | 85°C shell temperature shutdown, auto-recovers on cooldown |
| Switching Frequency | 250 ±10 kHz |
| Output Voltage Rise Time / Boot Delay | 100-130ms / 100-150ms |
| Isolation | Non-isolated (input and output share a common negative/ground) |
| Operating Ambient Temperature | -40°C to +50°C (-40°F to +122°F) |
| Shell (Case) Temperature Rating | -40°C to +83°C |
| Storage Temperature | -55°C to +100°C |
| Operating Humidity | 5-95%, non-condensing |
| Altitude | Up to 4,000m (13,123 ft) |
| Waterproof Rating | IP67 (dust-tight, temporary submersion-resistant) |
| Cooling Method | Natural convection (fanless) |
| Weight | ≤120g (≤4.2 oz) |
| Dimensions (L x W x H) | Approx. 64 × 57 × 22 mm (2.52 × 2.24 × 0.87 inches) |
| Mounting Hole Spacing | 54 mm horizontal (2.13 in); vertical dimensioned as 26 mm + 31 mm; 6.8 mm (0.27 in) hole diameter; 5 mm (0.20 in) edge margin |
| Input Wire Gauge / Length | 18 AWG, 15 cm (6 in) |
| Output Wire Gauge / Length | 16 AWG, 15 cm (6 in) |
| Certifications | RoHS, CE Compliant |
| MTBF | ≥200,000 hours (@ 48Vin, 10A) |
🔌 Wiring & Connections
The EM-48S2410Z has four pre-attached wire leads — two for input, two for output. There is no remote Enable (EN) pin on this particular model; the converter powers on automatically as soon as input voltage is applied within its operating range.
| Wire Color | Function | Gauge | Length |
|---|---|---|---|
| Red | Input Positive (+), 30-60V DC | 18 AWG | 15 cm (6 in) |
| Black (input side) | Input Negative (–) | 18 AWG | 15 cm (6 in) |
| Yellow | Output Positive (+), 24V DC | 16 AWG | 15 cm (6 in) |
| Black (output side) | Output Negative (–) | 16 AWG | 15 cm (6 in) |
⚠️ Important: This converter is non-isolated — the input negative and output negative leads share the same internal ground reference. Do not assume electrical isolation between your input power source and the load circuit. Plan your system grounding accordingly.
📝 Note: If your wiring run is longer than 50cm (about 20 inches), use a thicker wire gauge than the stock leads to avoid excessive voltage drop. If you need long cable runs, put the longer length on the input side (higher voltage, lower current) rather than the output side — this minimizes power loss along the wire.
⚠️ Critical: Match Your Input Power to Your Output Power
As with any DC-DC converter, your input power source must be able to supply at least as much power as your load will draw from the output. Since this converter is about 96% efficient, a simple rule of thumb is:
Required Input Power ≈ Output Power ÷ 0.96
At full rated output (240W), your input source needs to supply at least 240W ÷ 0.96 ≈ 250W. At 48V, that's roughly 5.2A of available input current; at 36V, roughly 6.9A; at the minimum 30V input, roughly 8.3A.
If the input source can't keep up, the converter will fold back the output voltage rather than deliver the full 24V. For example, if your load draws 10A at 24V (240W) but your input source can only provide 48V at 2A (96W), the converter can only deliver about 9.6V at that current — not the full 24V.
⚠️ Important: Always size your power source with headroom — at least 20-25% more current capacity than your calculated requirement.
🛡️ Protection Features
- Overload / Short-Circuit Protection — If output current exceeds the overcurrent threshold (15-22A) or a short circuit occurs, the converter enters "hiccup mode," repeatedly attempting to restart until the fault clears. It can withstand a continuous short circuit for 4+ hours without damage.
- Under-Voltage Protection — If input voltage drops below approximately 28.5V, the converter shuts down automatically to protect itself and your load. It restarts automatically once input voltage recovers to approximately 29.5V.
- Over-Temperature Protection — An internal temperature sensor shuts the output down if the shell reaches 85°C. Normal operation resumes automatically once the unit cools.
🛠️ Installation Tips
- Confirm your source voltage first. This module needs 30-60V DC at the input — do not connect it directly to a 12V or 24V source, and don't exceed 63V, even briefly.
- Size your power source for the load. If your input supply can't deliver enough current for the load you're powering, the converter's output voltage can sag below 24V. For example, a 4A (96W) 24V load fed from an input source that can only supply 1A at 48V (48W) will not receive a full, regulated 24V output.
- Mount for airflow. Even though this is a fanless design, leave open space around the housing so natural convection can carry heat away. Avoid sealing it inside an unventilated enclosure.
- Watch the shell temperature. Keep the case below 83°C during continuous operation for reliable long-term performance.
- Use the mounting holes. The two mounting tabs (54mm horizontal spacing, 6.8mm hole diameter) let you bolt the converter securely to a chassis, panel, or enclosure wall — recommended for vibration-prone installations like vehicles and forklifts.
- Seal any wire entry points. If you install this in a wet or outdoor location, make sure any enclosure or wire pass-through you add preserves the IP67 rating — the connector/lead exit point should be sealed against water ingress.
🎯 Common Applications
- Forklifts & Material Handling — Step 48V forklift battery power down to 24V for lights, displays, sensors, and cameras.
- Golf Carts & Electric Vehicles — Power 24V accessories and auxiliary systems from a 36V or 48V traction battery.
- Boats & Yachts — Supply 24V navigation electronics and accessories from a 48V house battery bank.
- Solar & Off-Grid Power — Regulate voltage from solar arrays or battery banks down to a stable 24V bus for downstream equipment.
- Industrial Automation — Power PLCs, sensors, and 24V control equipment from higher-voltage plant power.
- Telecommunications — Provide 24V power to remote radio units, repeaters, and monitoring equipment from 48V systems.
- 24V LED Lighting — Drive LED strips and fixtures from 36V/48V power sources in commercial and industrial installs.
🚫 Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No output voltage | Input voltage is below the 30V minimum, or below the ~28.5V under-voltage shutdown point | Check input voltage with a multimeter; confirm it's within 30-60V under load |
| Output shuts off and cycles on/off repeatedly | Converter is in hiccup mode due to an overload or short circuit on the output | Disconnect the load and check for wiring shorts; verify your load doesn't exceed 10A/240W |
| Output voltage is lower than 24V under load | Input power source can't supply enough current for the requested output power | Use a higher-current input supply, or reduce the connected load |
| Converter feels very hot to the touch | Insufficient airflow, or ambient temperature exceeding the -40°C to +50°C rating | Improve airflow around the unit; verify the shell isn't exceeding 83°C |
| Converter stops working after being submerged or exposed to heavy rain | Water entered through an unsealed wire connection point outside the module's own housing | Ensure any splices or connectors added downstream of the factory leads are properly sealed |
| Unexpected voltage readings between input and output ground | Non-isolated design — input and output negative share a common reference | This is expected behavior, not a fault; design your system grounding with this in mind |
💡 Tips for Best Results
- Match your input to your battery type — This converter is happiest running from fully-charged 36V or 48V battery systems within the 30-60V window.
- Don't undersize your input wiring — Even though the converter's own leads are rated for the job, make sure any extension wiring you add can handle up to 8.2A without excessive voltage drop.
- Test under real load — Bench-test your setup with the actual load connected before final installation to confirm stable 24V output.
- Label your wires — In multi-converter installations, label input and output leads clearly since the case shares a common non-isolated ground.
- Keep the fuse in mind — The built-in 20A input fuse is not user-replaceable; avoid conditions that could cause repeated inrush or overload events.
- Plan for vibration — In mobile or vehicle applications, use the mounting tabs rather than relying on the wire leads to support the unit.
🏪 Where to Buy
Buy the EM-48S2410Z 48V (30-60V) In To 24V 10A 240W Industrial DC-DC Waterproof Step Down Converter at Envistia Mall.
- 📦 Fast US Shipping
- 🔄 Hassle-Free Returns
- 📧 Responsive Customer Support
📚 Documentation & Resources
- PDF Datasheet: EM-48S2410Z Datasheet (PDF)
- Mechanical Drawing: EM-48S2410Z Mechanical Drawing (PDF)
- 3D STEP Model: EM-48S2410Z 3D STEP Model
This guide is provided by Envistia Mall for educational and technical reference purposes only. Envistia LLC (dba Envistia Mall) and the manufacturer are not responsible for any damages, losses, or injuries resulting from the use, misuse, or installation of this product. Always follow proper electrical safety practices — including verifying voltage polarity, using appropriately rated wiring, and observing the input voltage limits — before connecting or operating this module. Specifications in this guide are based on manufacturer data current as of publication and are subject to change without notice; always confirm critical specifications against the current datasheet before use in a specific application.