THL 10-4821WI Traco Power Power Supply (Other) In Stock
Traco Power THL 10-4821WI is a 10 W industrial DC/DC converter with 4:1 wide input range, 48 V nominal input delivering 21 V output, encapsulated in a compact 1 × 1 inch metal package for harsh industrial environments.
- Manufacturer
- Traco Power
- Package
- Other
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- THL 10-4821WI Datasheet PDF
- Category
- Power Supply
- Price
- From $35.0700(MOQ 5)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 10 W output power with 4:1 wide input range accepting 18 V to 75 V for flexible industrial power architectures
- Encapsulated 1 × 1 inch metal package providing robust EMI shielding and environmental protection
- Industrial-grade design supporting extended temperature operation in demanding field conditions
- Regulated DC output suitable for powering sensitive analog and digital subsystems from an unregulated 48 V bus
Applications
The Traco Power THL 10-4821WI is deployed in industrial automation controllers, railway subsystem power supplies, and field instrumentation equipment powered from a 48 V DC bus where a regulated 21 V output is required. Its 4:1 input range accommodates the voltage variations typical of battery-backed or solar-powered industrial systems operating between 18 V and 75 V. The encapsulated metal package protects the converter against moisture, dust, and vibration in outdoor or factory-floor installations.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the Traco Power THL 10-4821WI accept, and why is a 4:1 ratio advantageous for industrial systems?
The THL 10-4821WI supports a 4:1 wide input range centered on 48 V, typically spanning 18 V to 75 V. A 4:1 input ratio allows the converter to operate correctly even when the upstream bus voltage varies due to battery discharge, generator fluctuations, or inrush events. This eliminates the need for upstream pre-regulation in industrial panels and reduces total BOM cost by consolidating power conversion to a single module outputting 10 W at 21 V.
How does the 1 × 1 inch metal encapsulated package of the THL 10-4821WI benefit harsh-environment PCB designs?
The 1 × 1 inch (25.4 mm × 25.4 mm) metal encapsulated package shields the THL 10-4821WI's internal switching circuitry from radiated EMI interference and protects the windings and capacitors from moisture ingress and particulate contamination. The metallic enclosure also serves as a heatsinking surface, transferring up to 10 W of converter thermal dissipation to the PCB or chassis. This makes the module suitable for IP54-class industrial enclosures without additional potting or conformal coating.
What load-dependent output voltage can the THL 10-4821WI sustain, and what circuit types does this support?
The THL 10-4821WI delivers a regulated 21 V DC output at up to 10 W continuous output power, corresponding to approximately 476 mA at full load. This 21 V rail is suitable for powering 24 V-nominal analog sensors with some headroom, field-bus transceivers, relay coil drivers, and linear post-regulators feeding 15 V or 12 V subsystems. The regulated output maintains voltage within specification across the full 4:1 input swing, so downstream circuits see a stable 21 V regardless of upstream bus variation.
How does the THL 10-4821WI compare to a non-isolated boost converter for powering a 21 V load from a 48 V industrial bus?
Unlike a non-isolated boost converter, the THL 10-4821WI provides galvanic isolation between the 48 V input bus and the 21 V output rail, which is required when the output must float, be connected to chassis ground, or interface with safety-isolated measurement circuits. Isolation also breaks ground loops that cause measurement errors in sensors referenced to different ground potentials. The 10 W encapsulated module trades slightly lower efficiency compared to an optimized custom converter for the advantages of regulatory-ready isolation, compactness at 1 × 1 inch, and no external magnetics design effort.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About Traco Power
Traco Power is a leading electronic component manufacturer. FindMyChip sources Traco Power ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 5+ | $37.3100 | $186.55 |
| 25+ | $36.1900 | $904.75 |
| 100+ | $35.0700 | $3507.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”