VAF512 AC/DC Converter 12V 5W Equivalent & Substitute Parts

Part Overview

The VAF512 is an open frame AC/DC converter manufactured by Cosel USA, Inc., designed for commercial ITE applications. It provides a single 12V output at 450mA maximum current from a wide input voltage range of 85–264 VAC or 110–370 VDC. The unit operates across a temperature range of –10°C to 71°C with derating and achieves 78% efficiency.

The VAF512 carries an obsolete product status. Locating equivalent or substitute components is necessary to maintain system availability and ensure continued supply chain access for applications currently utilizing this converter.

Substiute Parts

VAF512

Cosel USA, Inc.In Stock: 939VAF512 Datasheet

Current PartRFQ

TUHS5F12

Cosel USA, Inc.In Stock: 7022TUHS5F12 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VAF512 is determined by strict alignment of the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Output voltage: 12V (fixed requirement)
• Output current capacity: 450mA minimum
• Input voltage range: Must support 85–264 VAC and minimum 110 VDC
• Power rating: 5W minimum
• Line regulation: 48mV maximum
• Load regulation: 100mV maximum

Mechanical Compatibility Criteria:

• Mounting type: Through Hole
• Package configuration: DIP module format
• Physical dimensions: Must fit within or match original footprint constraints

Compliance Criteria:

• RoHS3 compliance required
• Regulatory approvals: CE and cURus minimum

The TUHS5F12 meets all electrical parameters and maintains regulatory compliance. However, it differs in form factor (enclosed versus open frame) and package type (6-DIP versus 5-DIP), which may affect mechanical integration in existing designs.

Parameter Comparison

Engineering Selection Recommendations

The TUHS5F12 is the manufacturer-recommended substitute for the obsolete VAF512. Both units are manufactured by Cosel USA, Inc., and share identical electrical output specifications (12V, 450mA, 5W) with matching line and load regulation characteristics.

Advantages of TUHS5F12:

• Active product status ensures ongoing availability and supply chain continuity
• Enhanced operating temperature range (–40°C to 85°C versus –10°C to 71°C) provides broader environmental compatibility
• Improved efficiency rating (82% versus 78%) reduces thermal dissipation requirements
• Enclosed design offers improved electromagnetic interference (EMI) shielding compared to open frame construction
• Smaller physical footprint (28.7mm × 17.5mm × 12.7mm versus 72.4mm × 32.0mm × 20.1mm) enables space-constrained applications

Integration Considerations:

• The TUHS5F12 uses a 6-DIP module package versus the VAF512's 5-DIP module, requiring PCB layout verification
• Reduced physical dimensions necessitate mechanical mounting reassessment
• Enclosed construction may affect thermal management strategies in existing designs
• Both units maintain CE and cURus regulatory compliance; the VAF512 includes additional TUV certification

Selection of the TUHS5F12 is appropriate for new designs and applications requiring component replacement where mechanical integration can be accommodated.

Frequently Asked Questions (FAQ)

Q: Can the TUHS5F12 directly replace the VAF512 without PCB modifications?

A: Electrical compatibility is confirmed across all output specifications. However, mechanical integration requires assessment. The TUHS5F12 uses a 6-DIP module package versus the VAF512's 5-DIP module, and physical dimensions differ significantly (28.7mm × 17.5mm × 12.7mm versus 72.4mm × 32.0mm × 20.1mm). PCB footprint verification and potential layout adjustments are necessary.

Q: What is the minimum input voltage for each converter?

A: The VAF512 accepts 110 VDC minimum input. The TUHS5F12 accepts 120 VDC minimum input. Both support 85 VAC minimum. Applications operating below 120 VDC require the VAF512 specification.

Q: Are both converters RoHS3 compliant?

A: Yes. Both the VAF512 and TUHS5F12 are ROHS3 compliant.

Q: What regulatory certifications does each unit carry?

A: The VAF512 holds CE, cURus, and TUV approvals. The TUHS5F12 holds CE and cURus approvals. Applications requiring TUV certification must retain the VAF512 or identify an alternative with equivalent certifications.

Q: How do the operating temperature ranges differ?

A: The VAF512 operates from –10°C to 71°C with derating. The TUHS5F12 operates from –40°C to 85°C with derating. The TUHS5F12 provides a wider temperature envelope suitable for extended environmental conditions.

Q: What is the efficiency difference between these converters?

A: The VAF512 achieves 78% efficiency. The TUHS5F12 achieves 82% efficiency. The 4% improvement in the TUHS5F12 reduces power dissipation and thermal load in the application.

Q: Are the line and load regulation specifications identical?

A: Yes. Both converters specify 48mV line regulation and 100mV load regulation, ensuring equivalent output voltage stability under varying input and load conditions.

Q: Why is the VAF512 listed as obsolete?

A: The VAF512 has reached end-of-life status with the manufacturer. The TUHS5F12 represents the active product line continuation, offering improved performance and extended environmental operating range.