MPTE-015G Equivalent & Substitute Parts

Part Overview

The MPTE-015G is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by onsemi, rated for 15V reverse standoff voltage with a 25V maximum clamping voltage. This component is designed for general-purpose transient protection in through-hole axial configurations. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations.

Substiute Parts

MPTE-015G

onsemiIn Stock: 1090MPTE-015G Datasheet

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1.5KE18A

Taiwan Semiconductor CorporationIn Stock: 33821.5KE18A Datasheet

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1.5KE18A-TP

Micro Commercial CoIn Stock: 11421.5KE18A-TP Datasheet

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LCE15A

Littelfuse Inc.In Stock: 2372LCE15A Datasheet

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SA15A-B

Littelfuse Inc.In Stock: 1173SA15A-B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MPTE-015G is determined by the following critical parameters:

• Voltage - Reverse Standoff: 15V nominal (acceptable range 15V to 15.3V)
• Voltage - Clamping (Max) @ Ipp: 25V maximum (acceptable range 24.4V to 25.5V)
• Current - Peak Pulse: 60A minimum (acceptable range 60A to 61A)
• Power - Peak Pulse: 1500W (1.5kW)
• Mounting Type: Through Hole
• Package compatibility: DO-201 series axial packages

Substitute parts are grouped into two categories based on package type:

Group 1 (DO-201 Series - Full Compatibility): 1.5KE18A, 1.5KE18A-TP, and LCE15A maintain identical electrical performance and package compatibility with the original MPTE-015G.

Group 2 (DO-204AC - Limited Compatibility): SA15A-B operates within acceptable voltage parameters but features reduced peak pulse current (20.9A) and lower power dissipation (500W), making it suitable only for applications with lower transient energy requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Full Compatibility):

1.5KE18A, 1.5KE18A-TP, and LCE15A are direct functional equivalents for the MPTE-015G. All three maintain the required 15V reverse standoff voltage, 25V clamping voltage range, and 60A peak pulse current within specified tolerances. These parts are manufactured by active suppliers with ROHS3 compliance and superior moisture sensitivity ratings (MSL 1), providing improved reliability for new designs and replacements.

Secondary Substitute (Limited Compatibility):

SA15A-B maintains voltage compatibility but operates at reduced peak pulse current (20.9A) and power dissipation (500W). This part is suitable only for applications where transient energy levels are significantly lower than the original design specification. Package compatibility differs (DO-204AC versus DO-201AD), requiring PCB layout verification.

Compliance Considerations:

All active substitute parts carry REACH Unaffected status and EAR99 ECCN classification, matching the regulatory profile of the original MPTE-015G. The 1.5KE18A and LCE15A offer ROHS3 compliance, supporting modern manufacturing and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can 1.5KE18A directly replace MPTE-015G in existing designs?

A: Yes. The 1.5KE18A operates within the required voltage and current parameters. Both use DO-201 series axial packages with compatible pinouts. No circuit modifications are required.

Q: What is the difference between 1.5KE18A and LCE15A?

A: Both parts meet the electrical requirements for MPTE-015G substitution. The primary differences are manufacturer (Taiwan Semiconductor Corporation versus Littelfuse Inc.) and clamping voltage tolerance (25.5V versus 24.4V maximum). Both are active products with MSL 1 ratings.

Q: Why does SA15A-B have lower peak pulse current?

A: SA15A-B uses a different package (DO-204AC) and is rated for 20.9A peak pulse current versus 60A for the primary substitutes. This reflects a different product design intended for lower-energy transient protection applications. Verify application requirements before selecting this part.

Q: Are there temperature range differences between substitutes?

A: The MPTE-015G operates from -65°C to 175°C. All active substitutes operate from -55°C to 175°C. For applications requiring -65°C operation, verify that the reduced lower temperature limit is acceptable for your system.

Q: What does MSL 1 (Unlimited) mean compared to MSL 3?

A: MSL 1 indicates unlimited shelf life without moisture baking requirements. MSL 3 requires moisture baking within 168 hours of opening. Active substitutes with MSL 1 reduce handling complexity and storage constraints.

Q: Can I use 1.5KE18A-TP in automotive applications?

A: Yes. The 1.5KE18A-TP carries an Automotive grade designation and is rated for telecom applications, supporting broader environmental and reliability requirements than general-purpose classifications.