15KPA18CE3/TR13 Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 15KPA18CE3/TR13 is an active-status Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology. This through-hole P600 axial package component provides transient voltage protection with an 18V reverse standoff voltage rating and 15kW peak pulse power handling capability. The device operates across a temperature range of -55°C to 175°C and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility is required while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

15KPA18CE3/TR13

Microchip TechnologyIn Stock: 123515KPA18CE3/TR13 Datasheet

Current PartRFQ

15KPA18CA

SETsafe | SETfuseIn Stock: 166815KPA18CA Datasheet

DirectRFQ

SLD18-018

Littelfuse Inc.In Stock: 2585SLD18-018 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 15KPA18CE3/TR13 are classified based on the following critical parameters that determine functional interchangeability:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 18V
• Type: Zener diode
• Bidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Operating Temperature Range: -55°C to 175°C minimum

Secondary Compatibility Parameters:

• Power - Peak Pulse: 15000W or greater
• Voltage - Breakdown (Min): Within acceptable circuit tolerance
• Voltage - Clamping (Max) @ Ipp: Acceptable for application requirements

The identified substitute parts maintain the core electrical specifications (18V standoff voltage, Zener type, single bidirectional channel) and mechanical compatibility (P600 axial through-hole package). Variations in clamping voltage, peak pulse current, and compliance certifications are documented to enable informed selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

15KPA18CA (SETsafe | SETfuse):

This part maintains electrical equivalence with the main part across all critical parameters: 18V reverse standoff voltage, 15000W peak pulse power, and identical operating temperature range. Both devices are Zener-type, single-channel, through-hole P600 axial components. The 15KPA18CA is designated as Automotive Grade and carries active product status.

Compliance consideration: The 15KPA18CA is RoHS non-compliant, whereas the main part is ROHS3 compliant. This distinction is material for applications subject to RoHS regulatory requirements. REACH status is vendor-undefined for this substitute.

SLD18-018 (Littelfuse Inc.):

This part provides functional substitution with matching 18V reverse standoff voltage, identical operating temperature range, and compatible P600 axial through-hole package. The device is ROHS3 compliant and carries AEC-Q101 automotive qualification.

Power handling consideration: The SLD18-018 is rated for 5000W peak pulse power, which is one-third the 15000W rating of the main part. This substitute is suitable only for applications where peak pulse power requirements do not exceed 5000W. The device is qualified to AEC-Q101 automotive standards and is REACH affected.

Selection Logic:

• For applications requiring full 15000W peak pulse power handling with RoHS3 compliance: 15KPA18CE3/TR13 (main part) or SLD18-018 with power derating verification
• For applications permitting RoHS non-compliance with full 15000W power handling: 15KPA18CA
• For automotive-qualified applications with 5000W maximum power requirements and RoHS3 compliance: SLD18-018

Frequently Asked Questions (FAQ)

Q: Can the 15KPA18CA be used as a direct replacement for the 15KPA18CE3/TR13?

A: The 15KPA18CA provides electrical equivalence in standoff voltage (18V), peak pulse power (15000W), and operating temperature range (-55°C to 175°C). Both are Zener-type, single-channel, P600 axial through-hole devices. The primary distinction is RoHS compliance status: the main part is ROHS3 compliant while the 15KPA18CA is non-compliant. Selection depends on regulatory requirements for your application.

Q: Is the SLD18-018 suitable for all applications using the 15KPA18CE3/TR13?

A: The SLD18-018 matches the main part in reverse standoff voltage (18V), operating temperature range, and package type. However, the SLD18-018 is rated for 5000W peak pulse power compared to the main part's 15000W rating. This substitute is suitable only for applications where peak pulse power does not exceed 5000W. Verify your circuit's transient energy requirements before selection.

Q: What are the mechanical compatibility requirements for these substitutes?

A: All three parts (main and substitutes) use identical P600 axial through-hole packaging. They are mechanically interchangeable on PCBs designed for P600 axial components. No board layout modifications are required for physical installation.

Q: Are there compliance differences between these parts?

A: Yes. The 15KPA18CE3/TR13 and SLD18-018 are both ROHS3 compliant. The 15KPA18CA is RoHS non-compliant. The SLD18-018 carries AEC-Q101 automotive qualification and is REACH affected. The main part and 15KPA18CA have REACH status as unaffected or vendor-undefined respectively. Verify compliance requirements for your end application and regulatory jurisdiction.

Q: What is the significance of the voltage breakdown minimum specification differences?

A: The main part specifies 18.95V minimum breakdown voltage, while both substitutes specify 20V or 20.11V minimum. These variations fall within normal manufacturing tolerances for 18V-class TVS diodes. The 18V reverse standoff voltage (typical) remains consistent across all three parts, ensuring equivalent circuit protection characteristics.

Q: Can these parts be used interchangeably in automotive applications?

A: The 15KPA18CA is designated Automotive Grade. The SLD18-018 carries AEC-Q101 qualification. The main part (15KPA18CE3/TR13) does not specify automotive qualification. For automotive applications, verify that your design requirements align with the specific qualification status of each candidate part.