PT61018AAPEL LAN 10/100 Base-T Pulse Transformer Equivalent & Substitute Parts

Part Overview

The PT61018AAPEL is a 350µH LAN 10/100 Base-T pulse transformer manufactured by Bourns Inc., designed for automotive applications with AEC-Q200 qualification. This component features a 1CT:1CT turns ratio configuration and surface mount packaging. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

PT61018AAPEL

Bourns Inc.In Stock: 943PT61018AAPEL Datasheet

Current PartRFQ

SM13072APEL

Bourns Inc.In Stock: 2390SM13072APEL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PT61018AAPEL is determined by the following critical parameters:

• Transformer Type: Must be LAN 10/100 Base-T pulse transformer
• Inductance: Must be 350µH
• Turns Ratio Configuration: Must support 1:1 transmission and reception topology
• Mounting Type: Must be Surface Mount
• Physical Dimensions: Must match 0.504" L x 0.272" W (12.80mm x 6.90mm) footprint and 0.232" (5.90mm) maximum seated height
• Automotive Qualification: Must maintain AEC-Q200 compliance
• Regulatory Compliance: Must be ROHS3 compliant

The SM13072APEL meets all substitution criteria as a direct functional equivalent within the Bourns automotive transformer portfolio.

Parameter Comparison

Engineering Selection Recommendations

The SM13072APEL is the direct substitute for the discontinued PT61018AAPEL. Both components are manufactured by Bourns Inc. and maintain identical electrical specifications, physical dimensions, and automotive AEC-Q200 qualification. The SM13072APEL offers an extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C), providing additional thermal margin for demanding automotive environments. Both parts are ROHS3 compliant with MSL 1 rating, ensuring compatibility with standard manufacturing processes. The SM13072APEL is currently in active production with established inventory availability, making it the appropriate selection for new designs and replacement procurement.

Frequently Asked Questions (FAQ)

Q: Can SM13072APEL be used as a direct replacement for PT61018AAPEL in existing designs?

A: Yes. Both components share identical inductance (350µH), turns ratio configuration (1:1 transmitter/receiver), physical footprint (0.504" L x 0.272" W), and mounting type (surface mount). Both are AEC-Q200 qualified and ROHS3 compliant. No circuit modifications are required.

Q: What is the difference between the 1CT:1CT designation and the 1:1 Transmitter, 1:1 Receiver configuration?

A: Both designations describe the same functional transformer topology for LAN 10/100 Base-T applications. The SM13072APEL explicitly identifies the transmitter and receiver winding pairs, while the PT61018AAPEL uses the center-tap (CT) notation. The electrical performance and pin configuration are equivalent.

Q: Does the extended operating temperature range of SM13072APEL (-40°C ~ 125°C) affect compatibility?

A: No. The extended temperature range of the SM13072APEL is a superset of the PT61018AAPEL specification (-40°C ~ 85°C). The substitute part maintains full compatibility across the original operating temperature range and provides additional thermal capability.

Q: Are there packaging differences between these parts?

A: The PT61018AAPEL is specified with standard packaging, while the SM13072APEL is available in Cut Tape (CT) and Digi-Reel® formats. Both use identical surface mount packages with the same physical dimensions and mounting footprint.

Q: What certifications and compliance standards apply to both parts?

A: Both the PT61018AAPEL and SM13072APEL are AEC-Q200 qualified for automotive applications, ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both carry MSL 1 (unlimited) moisture sensitivity rating.