TDA51S-41HC - 5kVrms Isolator w/ DC-DC 150Mbps | MORNSUN
MPN: TDA51S-41HC ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for TDA51S-41HC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TDA51SCANHC
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →TDA51S485HC
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →TDA51S-41HC Maximum Ratings & Electrical Characteristics
| Product Type | Digital Isolator with Integrated Isolated DC-DC Converter |
| Isolation Voltage | 5000 Vrms (UL1577) |
| Data Rate | 150 Mbps |
| CMTI (Common-Mode Transient Immunity) | 150 kV/us |
| Isolation Channels | 3 forward + 1 reverse (4 total) |
| Fail-Safe Mode | Output low when input signal lost (H suffix) |
| Primary-Side Supply Voltage | 3.13 V to 3.56 V (3.3 V nominal) |
| Secondary-Side Supply Voltage | up to 5.5 V |
| Operating Temperature | -40C to +125C |
| Package | SOIC-16-300mil (wide body) |
| Mounting Type | Surface Mount |
| Isolation Standard | UL1577 (5000Vrms), ISO11898-2 bus requirements (per MORNSUN R5 bus IC family) |
| RoHS Status | Compliant |
| Integrated Isolated Power | Yes (eliminates separate isolated supply) |
TDA51S-41HC soic-16-300mil (wide body) Pin Configuration Guide
Complete pinout information for TDA51S-41HC (soic-16-300mil (wide body) package) with 16 pins. This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for TDA51S-41HC.
Refer to the datasheet for full pin configuration.
Estimated pin count: 16 pins (power package)
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TDA51S-41HC is suitable for 6 applications: Isolated Industrial Fieldbus Nodes, IGBT/SiC Gate-Drive Isolation, Battery Management Systems (BMS), PLC I/O Modules, Renewable Energy Inverters, Medical and Test Instrumentation Isolation.
Isolated Industrial Fieldbus Nodes
The TDA51S-41HC fits industrial fieldbus and general isolated signaling nodes where a communication port must cross a galvanic boundary in a single SOIC-16-300mil footprint. Its 150Mbps rate covers high-speed serial links, while 5000Vrms reinforced isolation (UL1577 basis) and 150kV/us CMTI protect logic from ground-potential differences and switching transients on factory floors. The integrated isolated DC-DC removes the external isolated supply that a standalone isolator would need, cutting BOM count and PCB area in dense I/O modules. With 3 forward + 1 reverse channels and a fail-safe low default (H suffix), it supports half-duplex style signaling with a defined safe state. Layout should follow the MORNSUN datasheet creepage guidance, keeping the isolation barrier free of traces and using solid ground planes on both sides.
Recommended
IGBT/SiC Gate-Drive Isolation
In motor drives, solar inverters, and industrial power conversion, gate-drive signals must cross the power-stage isolation barrier while withstanding extreme dV/dt events. The TDA51S-41HC provides 150kV/us CMTI, comfortably above typical SiC switching slew rates of 50-100kV/us, and 5000Vrms reinforced isolation for the barrier. Its integrated isolated DC-DC energizes the isolated-side signaling electronics without an external isolated bias supply, simplifying multi-channel gate-drive boards where each phase would otherwise need its own isolated power module. Designers should budget the isolated-side load against the integrated converter capability per the MORNSUN datasheet and place the device close to the gate driver with short, low-inductance signal paths. The fail-safe low output ensures gate signals default to a safe state if the input side loses power or signal integrity.
Recommended
Battery Management Systems (BMS)
Battery management systems require isolated communication between cell-monitoring electronics at high battery potential and the low-voltage control side. The TDA51S-41HC provides that bridge with 5000Vrms reinforced isolation and an integrated isolated DC-DC that can power the isolated-side interface, valuable in stacked battery packs where generating a local isolated supply per module adds cost and failure points. The -40C to +125C operating range covers automotive-adjacent and industrial battery environments, and the 150Mbps rate supports fast pack telemetry. Because the isolated converter is integrated, designers must verify the isolated power budget covers the secondary-side load per the MORNSUN datasheet. For pack-level CAN communication, the family TDA51SCANHC variant provides a dedicated ISO11898-2 CAN physical layer in the same isolation class.
Recommended
PLC I/O Modules
Programmable logic controller I/O cards isolate field wiring from backplane logic, often needing many isolated channels plus isolated power in a constrained card height. The TDA51S-41HC integrates both signal isolation (3 forward + 1 reverse channels) and isolated power in one SOIC-16-300mil device, reducing component count versus a discrete isolator plus isolated DC-DC module per channel. The 150Mbps rate supports high-throughput serial backplanes, and 5000Vrms isolation meets typical industrial insulation requirements. The wide -40C to +125C range suits cabinet-mounted equipment near drives and power supplies. Layout should maintain the isolation barrier with adequate creepage per the MORNSUN datasheet and route field-side signals away from logic-side planes. The fail-safe low output gives defined behavior when field power is removed from a channel.
Recommended
Renewable Energy Inverters
Solar and wind inverters combine high-voltage power stages with networked control (RS-485, CAN) and safety-critical feedback loops. The TDA51S-41HC serves the control-to-power-stage signaling boundary with 150kV/us CMTI against fast inverter switching, 5000Vrms reinforced isolation for grid-referenced barriers, and an integrated isolated DC-DC that simplifies the auxiliary power architecture. Its 150Mbps data rate supports high-speed control loops, and the -40C to +125C range matches outdoor enclosure temperatures. For the inverter's external communication port, the same family offers the TDA51S485HC (RS-485) and TDA51SCANHC (CAN, ISO11898-2) variants with identical isolation class, allowing a unified bill of materials strategy across signaling, bus, and gate-drive isolation functions within one MORNSUN product line.
Recommended
Medical and Test Instrumentation Isolation
Patient-connected and high-voltage test instruments demand reinforced isolation between measurement front ends and digital processing. The TDA51S-41HC provides a compact barrier with 5000Vrms reinforced isolation and an integrated isolated DC-DC that powers the isolated front-end section, useful in portable instruments where a discrete isolated supply would add size and leakage-path complexity. The 150Mbps rate supports high-resolution data streaming from isolated acquisition stages, and the low-default fail-safe behavior yields predictable output during power-up sequencing or cable disconnection. Designers must validate creepage and clearance against the applicable medical insulation standard in addition to the UL1577 5000Vrms component rating, per the MORNSUN datasheet layout guidance, and confirm the isolated power budget covers front-end analog supply requirements.
Recommended
Recommended Products Summary
Engineering reference data for TDA51S-41HC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TDA51SCANHC | TDA51S485HC |
|---|---|---|---|
| Package | SOIC-16-300mil | SOIC-16-300mil - same family package | SOIC-16-300mil - same family package |
| Brand | MORNSUN | MORNSUN | MORNSUN |
| Isolation Voltage | 5000 Vrms (UL1577) | 5000 Vrms (UL1577) | 5000 Vrms (UL1577) |
| CMTI | 150 kV/us | 150 kV/us | 150 kV/us |
| Data Rate / Protocol | 150 Mbps general signaling | CAN, ISO11898-2 physical layer | RS-485 transceiver |
| Channel Configuration | 3 forward + 1 reverse | [DATA_NEEDED] | [DATA_NEEDED] |
| Integrated Isolated DC-DC | Yes | Yes | Yes |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- Integrated isolated DC-DC eliminates external isolated supply (vs TDA51SCANHC)
- 150Mbps general-purpose signaling rate (vs TDA51S485HC)
- Fail-safe low default output (H suffix) (vs TDA51SCANHC)
Design Notes
Maintain the isolation barrier across the SOIC-16-300mil body: keep all PCB traces, planes, and vias out of the creepage/clearance zone between side 1 and side 2, and never route signals under the package across the barrier. Follow the MORNSUN datasheet layout section for minimum spacing, and if the design targets reinforced insulation in medical or grid applications, validate board spacing against the applicable system standard in addition to the component's UL1577 5000Vrms rating.
The integrated isolated DC-DC converter powers the isolated side internally, but its output budget is finite. Before connecting external loads to the isolated side, calculate total secondary-side consumption from the MORNSUN datasheet isolated-power specification. Estimated: if your isolated-side circuitry draws more than the integrated converter output, you must add an external isolated supply; do not assume the converter can power gate-driver stages with large gate charge in high-frequency switching designs.
Respect the primary-side supply range of 3.13V to 3.56V (3.3V nominal); the integrated power converter performance is specified within this window and driving it at 5V may violate absolute maximum ratings. Decouple both sides with low-ESR ceramic capacitors placed directly at the supply pins. Also verify the fail-safe behavior: as an H-suffix device, the TDA51S-41HC defaults its output low on signal loss - confirm this matches your bus idle-state requirements before committing to layout.
Compliance Information
RoHS compliance stated in Twicea, Utmel, and JLCPCB distributor listings. UL1577-based 5000Vrms isolation cited in MORNSUN product news; ISO11898-2 conformance cited for the R5 bus IC family. REACH, halogen-free, and conflict-minerals status not found in retrieved data.
