KWS10-5 AC/DC Converter Equivalent & Substitute Parts

Part Overview

The KWS10-5 is an enclosed AC/DC converter manufactured by TDK-Lambda Americas Inc, rated for 10W output power with a single 5V output at 2A maximum current. The unit accepts universal AC input (85–265 VAC) and is designed for ITE (Commercial) applications. The KWS10-5 is classified as obsolete, necessitating identification of active equivalent and substitute parts to maintain design continuity and ensure ongoing component availability for new production and field replacements.

Substiute Parts

KWS10-5

TDK-Lambda Americas IncIn Stock: 1346KWS10-5 Datasheet

Current PartRFQ

KPSA10-5

TDK-Lambda Americas IncIn Stock: 912KPSA10-5 Datasheet

DirectRFQ

KWS10A-5

TDK-Lambda Americas IncIn Stock: 1911KWS10A-5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete KWS10-5 is determined by the following critical parameters:

Electrical Compatibility:

• Output voltage: 5V (fixed requirement)
• Output current capacity: minimum 2A
• Input voltage range: 85–265 VAC (universal input)
• Power rating: 10W

Mechanical Compatibility:

• Mounting type: Through Hole
• Package form factor: DIP module configuration
• Physical dimensions: compatible with 5-DIP footprint

Regulatory & Compliance:

• Safety standard: 60950-1
• Approval agencies: CE, CSA, EN, UL

Two substitute parts meet these criteria with varying trade-offs in form factor, temperature range, and efficiency:

1. KPSA10-5: Open frame variant with improved efficiency (75%) but reduced maximum operating temperature (0°C to 70°C) and different package (4-DIP).

2. KWS10A-5: Enclosed variant with extended temperature range (–10°C to 85°C), higher efficiency (77%), dual input support (AC and DC), and compact 4-DIP package. This is the manufacturer-recommended replacement.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred):

The KWS10A-5 is the manufacturer-recommended substitute. It maintains the enclosed form factor of the original KWS10-5, preserves the 2A output current specification, and extends the operating temperature range to –10°C to 85°C. The KWS10A-5 achieves higher efficiency (77% vs. 73%) and introduces dual input capability (AC and DC). The compact 4-DIP package reduces board space by approximately 40% compared to the 5-DIP original. Both parts comply with IEC 60950-1 safety standard. The KWS10A-5 holds active product status with RoHS compliance and REACH unaffected designation.

For Space-Constrained Applications:

The KWS10A-5 also serves applications requiring minimal footprint due to its significantly smaller dimensions (38.1 × 25.4 × 21.5 mm vs. 64.0 × 45.0 × 20.5 mm).

For Open-Frame Requirement:

The KPSA10-5 is suitable only if the application specifically requires an open-frame topology. This variant maintains the 10W power rating and 5V output but does not specify maximum output current. The KPSA10-5 operates within a narrower temperature range (0°C to 70°C) and achieves 75% efficiency. It is RoHS compliant and holds active product status. The 4-DIP package is more compact than the original 5-DIP.

Compliance Consideration:

The KWS10A-5 lists CE approval only, whereas the original KWS10-5 and KPSA10-5 include CSA, EN, and UL approvals. Applications requiring full multi-agency certification should verify compliance requirements against the KWS10A-5 datasheet.

Frequently Asked Questions (FAQ)

Q: Can the KWS10A-5 directly replace the KWS10-5 on existing PCBs?

A: The KWS10A-5 uses a 4-DIP package versus the original 5-DIP package. PCB footprint modification is required. The KWS10A-5 dimensions are significantly smaller (38.1 × 25.4 × 21.5 mm vs. 64.0 × 45.0 × 20.5 mm), allowing relocation flexibility. Pin configuration must be verified against both datasheets before layout changes.

Q: What is the difference between the KPSA10-5 and KWS10A-5?

A: The KPSA10-5 is an open-frame design with 75% efficiency and operates from 0°C to 70°C. The KWS10A-5 is an enclosed design with 77% efficiency, extended temperature range (–10°C to 85°C), and dual AC/DC input capability. The KWS10A-5 is the manufacturer-recommended replacement for the obsolete KWS10-5.

Q: Does the KWS10A-5 support DC input?

A: Yes. The KWS10A-5 accepts both AC input (85–265 VAC) and DC input (120–370 VDC), whereas the original KWS10-5 accepts AC input only (85–265 VAC). This expanded input range provides design flexibility for applications with variable power sources.

Q: Is the output current specification identical across all three parts?

A: The KWS10-5 and KWS10A-5 both specify 2A maximum output current. The KPSA10-5 does not specify maximum output current in the provided data. For applications requiring confirmed 2A output, the KWS10A-5 is the appropriate choice.

Q: What are the temperature operating limits for each part?

A: KWS10-5 operates from –10°C to 70°C. KPSA10-5 operates from 0°C to 70°C. KWS10A-5 operates from –10°C to 85°C. Applications requiring operation below 0°C must use the KWS10-5 or KWS10A-5. Applications requiring operation above 70°C must use the KWS10A-5.

Q: Are all three parts RoHS compliant?

A: The KWS10-5 RoHS status is not specified. The KPSA10-5 and KWS10A-5 are both RoHS compliant. Applications subject to RoHS requirements should use KPSA10-5 or KWS10A-5.

Q: What is the efficiency improvement of the KWS10A-5 compared to the original?

A: The KWS10A-5 achieves 77% efficiency versus 73% for the KWS10-5, representing a 4 percentage point improvement. This reduces thermal dissipation and improves overall system power efficiency.

Q: Can the KPSA10-5 be used as a substitute if the KWS10A-5 is unavailable?

A: The KPSA10-5 meets the core electrical requirements (10W, 5V output, universal AC input, 60950-1 compliance) but differs in form factor (open frame vs. enclosed), temperature range (0°C to 70°C vs. –10°C to 85°C), and unspecified output current. Use only if the application tolerates these differences and does not require the enclosed housing or extended temperature range of the original.