About this part

ZUS30512 – 3W Isolated DC-DC Converter Module, 4.5-9V Input, 12V/250mA Output – Cosel USA

This Cosel USA ZUS30512 isolated DC-DC converter module provides reliable, regulated 12V power in compact designs. Ideal for legacy or replacement needs in commercial systems, it delivers efficient voltage conversion with 500V isolation protection and over-current protection (OCP) in a through-hole package.

Key Features

• Output: 12V ±2% at 250mA (3W)
• Input Range: 4.5V to 9V DC
• High Isolation: 500V reinforced insulation
• Protection: Over-Current Protection (OCP)
• Efficiency: Up to 70% (typical)
• Compact Design: 35.0mm x 23.0mm x 7.0mm (1.38″ x 0.91″ x 0.28″)

Technical Details

• Series: ZUS (3W)
• Mounting: Through Hole (4-DIP Module)
• Operating Temperature: -20°C to +71°C (with derating)
• Regulation: ±0.5% line regulation, ±2% load regulation
• Safety Standards: Designed to meet UL/EN/IEC 60950-1

Typical Applications

• Legacy industrial control systems
• Telecom infrastructure equipment
• Commercial ITE devices (per UL 60950-1)
• Test and measurement instruments
• Embedded computing replacements

About Cosel USA

Cosel USA, Inc. is a globally recognized leader in power conversion technology with over 50 years of innovation. The company specializes in robust, high-efficiency power solutions for industrial, medical, and IT applications, adhering to stringent international safety and quality standards.

Renowned for exceptional reliability and rigorous testing protocols, Cosel products undergo comprehensive validation for thermal management, EMI performance, and long-term stability. Their design expertise ensures compatibility with demanding operational environments, making them a trusted partner for critical power infrastructure worldwide.

About Isolated DC-DC Converters

Isolated DC-DC converters electrically separate input and output circuits, preventing ground loops and protecting sensitive components from voltage surges. This isolation is critical for safety compliance, noise reduction, and system integrity in multi-voltage designs.

These modules simplify power architecture in embedded systems by providing regulated voltage conversion without custom circuitry. Their compact footprint and pre-certified designs accelerate development cycles for industrial automation, communications, and commercial electronics, particularly where space constraints or safety standards are paramount.

Packaging

This product ships in protective manufacturer packaging (Box).

FAQs

Question: Is this module suitable for new designs?
Answer: This part is marked obsolete by Cosel. It is recommended for replacement or legacy system maintenance only.

Question: What does “with derating” mean for the operating temperature?
Answer: Above +50°C, the module’s maximum load capacity gradually decreases to maintain safe operation. Refer to the datasheet for derating curves.

Question: Can I parallel multiple ZUS30512 modules for higher current?
Answer: No, this series does not support parallel operation due to lack of current sharing circuitry.

Question: Is the 500V isolation rating sufficient for industrial environments?
Answer: Yes, 500V isolation meets basic safety requirements for ITE/commercial equipment per UL 60950-1. Verify against your system’s specific standards.

Question: Does PCX provide datasheets for obsolete parts?
Answer: Yes, download the ZUS30512 datasheet from our product page at PCXCo.com for detailed specifications.

Question: What are alternatives if this model is unavailable?
Answer: Contact PCX technical support for assistance identifying compatible modern replacements with similar form/function.

Order Today!

Secure limited stock for your maintenance projects – order the Cosel ZUS30512 from PCX today for reliable same-day shipping and dedicated technical support!

Product images are representational. Refer to datasheet for exact specifications.