KMS40-5 Equivalent & Substitute Parts Reference

Part Overview

The TDK-Lambda Americas Inc KMS40-5 is an enclosed AC/DC converter designed for medical applications, supplying 5V at up to 8A from a universal AC (90 ~ 264 VAC) or DC (100 ~ 375 VDC) input. With a maximum output power of 40W and several international safety approvals, it is suitable for professional environments where reliability and regulatory compliance are required. The KMS40-5 is marked as “Not For New Designs,” necessitating the identification of alternative models for ongoing or future requirements due to potential obsolescence and limited long-term availability.

Substiute Parts

KMS40-5

TDK-Lambda Americas IncIn Stock: 810KMS40-5 Datasheet

Current PartRFQ

KMS40-3P3

TDK-Lambda Americas IncIn Stock: 1020KMS40-3P3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is determined by alignment with critical electrical and mechanical parameters, approval agencies, and application compatibility. The main allowed criteria are:

• Power rating: 40 W
• Input voltage range: 90 ~ 264 VAC, 100 ~ 375 VDC
• Maximum output current: 8A
• Number of outputs: 1
• Universal input feature
• Through hole mounting
• Same package/case (7-DIP Module, 5 Leads)
• Dimensions matching the main part
• Medical application suitability
• Compliance with RoHS, REACH, and listed agency/standard approvals

Substitute parts are strictly based on matching or compatible specifications in the above parameters, with output voltage as the differentiator.

Parameter Comparison

Engineering Selection Recommendations

Selection of AC/DC converter substitute parts for the KMS40-5 should be based on matching regulatory compliance (RoHS and REACH status), identical approval agency listings (CE, EN, IEC, UL), and adherence to the specified safety standards (60601-1, 60950-1, 62368-1). Substitute models in the same series with equivalent mechanical dimensions, mounting style, and power ratings are eligible for substitution; only the output voltage differs among listed alternatives.

Frequently Asked Questions (FAQ)

What is the main difference between KMS40-5 and KMS40-3P3?

The primary difference is the output voltage: KMS40-5 provides 5V, while KMS40-3P3 provides 3.3V. All other parameters, including input voltage range, output current, power rating, dimensions, mounting, and regulatory approvals, remain the same.

Are the KMS40-5 and KMS40-3P3 footprint and mounting compatible?

Both units use the 7-DIP Module, 5 Leads package and share the same physical dimensions and through hole mounting, allowing direct mechanical interchangeability.

Are the listed substitutes compliant with the same medical and safety standards?

Yes. Both KMS40-5 and KMS40-3P3 carry approvals for CE, EN, IEC, UL and meet 60601-1, 60950-1, and 62368-1 standards, with affirmative RoHS and REACH status.

Can substitute models be used for new designs?

The listed models are marked “Not For New Designs.” Alternate sourcing is primarily for support and maintenance of legacy products already in the field.

Do KMS40-5 and KMS40-3P3 share thermal and efficiency characteristics?

Both models have an operating temperature range of -25°C to 70°C (with derating); efficiency differs (79% for KMS40-5, 75% for KMS40-3P3). Other thermal and weight characteristics are consistent.