E1203S-2WR3

Device Overview
The MORNSUN E1203S-2WR3 is a compact, high-efficiency isolated DC-DC converter designed for industrial, telecom, and embedded applications requiring reliable voltage conversion with electrical isolation. This module provides a fixed input voltage range and a regulated output, making it suitable for powering control circuits, sensors, and low-power electronic devices. The E1203S-2WR3 is a single-output, non-adjustable converter optimized for high performance in a compact package with low ripple and high isolation.

Key Features

* Wide input voltage: 9 V to 36 V DC, compatible with 12 V and 24 V systems.
* Output voltage: 3.3 V DC, fixed and regulated.
* Output power: 2 W typical.
* High efficiency up to 80%, minimizing energy loss and heat generation.
* Isolation voltage: 1.5 kVDC minimum, providing safety and noise immunity between input and output.
* Compact SIP-3 package for space-constrained applications.
* Operating temperature range: −40°C to +85°C for industrial reliability.
* Short-circuit protection with automatic recovery.
* Low ripple and noise suitable for sensitive electronic circuits.
* No external components required, simplifying PCB design.

Electrical Specifications

* Input Voltage Range: 9–36 V DC
* Nominal Input Voltage: 12 V DC and 24 V DC variants
* Output Voltage: 3.3 V DC
* Output Current: 606 mA typical
* Output Power: 2 W maximum
* Efficiency: 78–80% typical depending on load and input voltage
* Ripple and Noise: 50 mVp-p typical
* Line Regulation: ±1% typical
* Load Regulation: ±5% typical
* Quiescent Current: 8 mA typical at nominal input voltage
* Isolation Voltage: 1500 VDC minimum between input and output
* Switching Frequency: 100 kHz typical
* Overcurrent Protection: 150–200% of rated output current, auto recovery
* Temperature Coefficient: ±0.03%/°C typical

Thermal and Environmental Characteristics

* Operating Temperature: −40°C to +85°C
* Storage Temperature: −55°C to +125°C
* Humidity: 95% RH maximum non-condensing
* Thermal Resistance, Case-to-Ambient (R_θCA): 50°C/W typical depending on PCB design
* Thermal Shutdown: Internal thermal protection prevents overheating

Package Information

* Package Type: SIP-3 (Single In-line Package, 3 pins)
* Dimensions: 25 mm × 12.5 mm × 10 mm typical
* Pin Configuration:

* Pin 1: Vin+
* Pin 2: Vin−
* Pin 3: Vout+
* Pin 4: Vout−
* Pin Material: Tin-plated copper alloy for reliable soldering
* Mounting: Through-hole for easy PCB integration

Applications

* Industrial control systems requiring isolated power for sensors or logic circuits.
* Telecom equipment for powering low-voltage electronics with isolation.
* Embedded systems and microcontroller modules requiring stable 3.3 V supply.
* Instrumentation and data acquisition systems needing low-noise, regulated voltage.
* Battery-powered or solar-powered systems where compact, high-efficiency converters are required.
* General-purpose electronics where input-to-output isolation is necessary for safety and signal integrity.

Reliability and Performance

* High isolation ensures safe operation in industrial and telecom environments.
* Low ripple and high regulation accuracy provide stable power to sensitive circuits.
* Compact SIP-3 package simplifies PCB layout and saves board space.
* High efficiency minimizes heat generation, enhancing reliability and extending component life.
* Overcurrent and thermal protection features increase system robustness in demanding applications.
* Wide input range accommodates fluctuating power sources and maintains output stability.

Summary of Key Specifications

| Parameter | Value |
| --------------------- | ---------------- |
| Input Voltage Range | 9–36 V DC |
| Nominal Input Voltage | 12 V / 24 V DC |
| Output Voltage | 3.3 V DC |
| Output Current | 606 mA typical |
| Output Power | 2 W max |
| Efficiency | 78–80% typical |
| Isolation Voltage | 1500 VDC min |
| Ripple & Noise | 50 mVp-p typical |
| Line Regulation | ±1% typical |
| Load Regulation | ±5% typical |
| Quiescent Current | 8 mA typical |
| Switching Frequency | 100 kHz typical |
| Operating Temperature | −40°C to +85°C |
| Storage Temperature | −55°C to +125°C |
| Package | SIP-3 |

The E1203S-2WR3 provides a compact, reliable, and efficient solution for isolated 3.3 V DC power applications. Its combination of high isolation, wide input range, low ripple, and protection features makes it suitable for industrial, telecom, and embedded systems where space, efficiency, and safety are critical.