DPA426SN Equivalent & Substitute Parts

Part Overview

The DPA426SN is a DPA-Switch® Converter IC designed for Power Over Ethernet (PoE) and Telecom applications. This device functions as a voltage regulator with single output capability, rated for input voltages between 16V and 75V with a 220V output specification. The DPA426SN is classified as an obsolete product, which necessitates identification of active equivalent alternatives for ongoing design support and procurement requirements.

Substiute Parts

DPA426SN

Power IntegrationsIn Stock: 17063DPA426SN Datasheet

Current PartRFQ

DPA426R-TL

Power IntegrationsIn Stock: 2645DPA426R-TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DPA426SN is determined by strict electrical and mechanical compatibility criteria. The following parameters must remain constant across equivalent parts:

Electrical Compatibility Requirements:

• Manufacturer: Power Integrations (same manufacturer ensures design consistency)
• Series: DPA-Switch® (same product family)
• Base Product Number: DPA426 (same core design)
• Input Voltage Range: 16V ~ 75V (identical specification)
• Number of Outputs: 1 (single output configuration)
• Output Voltage: 220V (identical output specification)
• Operating Temperature Range: -40°C ~ 125°C (identical thermal specification)
• Moisture Sensitivity Level: 4 (72 Hours) (identical MSL rating)

Mechanical Compatibility Considerations:

• Mounting Type: Surface Mount (required for PCB integration)
• Package/Case: Different package options available (S-PAK vs. TO-263-7C)

The DPA426R-TL qualifies as a direct substitute based on matching all electrical parameters while offering an alternative surface mount package configuration.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: DPA426R-TL

The DPA426R-TL is the qualified substitute for the obsolete DPA426SN. This recommendation is based on the following engineering factors:

Electrical Equivalence: All critical electrical parameters match exactly, including input voltage range (16V ~ 75V), output voltage (220V), output count (1), and operating temperature range (-40°C ~ 125°C). Both devices are manufactured by Power Integrations within the DPA-Switch® series.

Product Status Advantage: The DPA426R-TL maintains Active product status, ensuring continued manufacturer support, availability, and technical documentation. The DPA426SN is classified as Obsolete, which restricts procurement options and future support.

Package Consideration: The DPA426R-TL uses TO-263-7C packaging (D2PAK with 6 leads plus tab) instead of the S-PAK package of the DPA426SN. PCB layout modifications are required to accommodate the different package footprint. Verify pinout compatibility and thermal pad requirements during design transition.

Compliance Status: The DPA426R-TL is RoHS non-compliant. If RoHS compliance is a design requirement, this substitution may not be suitable without additional regulatory review.

Inventory Availability: The DPA426R-TL has 2,579 units in stock, supporting immediate procurement needs.

Frequently Asked Questions (FAQ)

Q: Can the DPA426R-TL directly replace the DPA426SN without PCB modifications?

A: Electrical substitution is valid; however, package differences require PCB layout changes. The DPA426SN uses S-PAK packaging while the DPA426R-TL uses TO-263-7C (D2PAK) packaging. Footprint, pinout, and thermal pad designs differ between these packages. PCB redesign is necessary.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution is valid when the following parameters match: input voltage range (16V ~ 75V), output voltage (220V), number of outputs (1), operating temperature range (-40°C ~ 125°C), and manufacturer (Power Integrations). All these parameters are identical between DPA426SN and DPA426R-TL.

Q: Why is the DPA426SN classified as Obsolete?

A: Product status is determined by the manufacturer. Obsolete classification indicates the part is no longer in active production. The DPA426R-TL is the active equivalent within the same product family.

Q: Are there any compliance differences between these parts?

A: The DPA426R-TL is RoHS non-compliant. If your application requires RoHS compliance, this must be evaluated against your regulatory requirements. Both parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: Both the DPA426SN and DPA426R-TL have MSL 4 (72 Hours) rating. This indicates the parts must be stored in controlled humidity conditions and have a 72-hour floor life after exposure to ambient conditions.

Q: Is the DPA426R-TL available in different packaging options?

A: The DPA426R-TL is supplied in Cut Tape (CT) and Digi-Reel® packaging formats. Confirm your procurement format requirements with your supplier.