SLD15-018-B Equivalent & Substitute Parts

Part Overview

The SLD15-018-B is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for through-hole applications in the P600 axial package. This component provides transient overvoltage protection with a 15V reverse standoff voltage and 24.4V maximum clamping voltage at peak pulse current. The part is AEC-Q101 qualified for automotive applications and maintains active product status with full RoHS3 compliance. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters within the specified voltage and power ratings.

Substiute Parts

SLD15-018-B

Littelfuse Inc.In Stock: 873SLD15-018-B Datasheet

Current PartRFQ

5KP15CA

Littelfuse Inc.In Stock: 37845KP15CA Datasheet

MFR RecommendedRFQ

SA15CA

Taiwan Semiconductor CorporationIn Stock: 16178SA15CA Datasheet

MFR RecommendedRFQ

SA15CA-B

Littelfuse Inc.In Stock: 783SA15CA-B Datasheet

MFR RecommendedRFQ

5KP15CA-TP

Micro Commercial CoIn Stock: 13485KP15CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLD15-018-B are identified based on the following critical parameters that determine functional equivalence:

Electrical Matching Criteria:

• Voltage - Reverse Standoff (Typ): 15V
• Voltage - Breakdown (Min): 16.7V
• Voltage - Clamping (Max) @ Ipp: 24.4V
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Type: Zener, Bidirectional
• RoHS3 Compliance

Package Compatibility Considerations: Substitutes are grouped by package type. The primary substitute 5KP15CA maintains identical P600 axial packaging and peak pulse power rating (5000W). The SA15CA and SA15CA-B variants use DO-204AC (DO-15) axial packaging with reduced peak pulse current and power ratings (21A / 20.9A and 500W respectively), suitable for lower-power applications. The 5KP15CA-TP variant uses R-6 axial packaging with equivalent power rating but unspecified peak pulse current.

All substitutes maintain the 15V reverse standoff voltage, 16.7V minimum breakdown voltage, and 24.4V maximum clamping voltage, ensuring voltage regulation compatibility across the specified operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - 5KP15CA (Littelfuse Inc.): The 5KP15CA is the direct electrical and functional equivalent to the SLD15-018-B. It maintains identical voltage specifications (15V reverse standoff, 16.7V breakdown minimum, 24.4V clamping maximum), peak pulse current (209A), and power dissipation (5000W). Both parts use P600 axial through-hole packaging and are manufactured by Littelfuse Inc. with active product status and full RoHS3 compliance. The primary difference is packaging format (Cut Tape vs. Bulk), which does not affect electrical performance or board-level compatibility.

Secondary Substitutes - SA15CA and SA15CA-B: These parts maintain identical voltage regulation characteristics (15V standoff, 16.7V breakdown, 24.4V clamping) and operating temperature range but use DO-204AC (DO-15) axial packaging with significantly reduced peak pulse current (21A / 20.9A) and power dissipation (500W). These substitutes are suitable only for applications requiring lower transient energy absorption. Board-level modifications may be required due to package geometry differences.

Alternative Substitute - 5KP15CA-TP (Micro Commercial Co): This part maintains equivalent voltage specifications and 5000W power rating in R-6 axial packaging. Peak pulse current is not specified in available data. This substitute is suitable for applications where R-6 package geometry is compatible with board layout requirements.

All substitutes maintain active product status, AEC-Q101 automotive qualification (where applicable), and full RoHS3 compliance, ensuring regulatory and environmental compatibility with the original SLD15-018-B specification.

Frequently Asked Questions (FAQ)

Q: Can the 5KP15CA be used as a direct replacement for the SLD15-018-B? A: Yes. The 5KP15CA is electrically and functionally equivalent, with identical voltage ratings (15V standoff, 24.4V clamping), peak pulse current (209A), and power dissipation (5000W). Both use P600 axial through-hole packaging. The only difference is packaging format (Cut Tape vs. Bulk), which does not affect circuit performance.

Q: What are the limitations of using SA15CA or SA15CA-B as substitutes? A: The SA15CA and SA15CA-B variants have reduced peak pulse current (21A / 20.9A) and power dissipation (500W) compared to the SLD15-018-B (209A / 5000W). These parts are suitable only for lower-energy transient protection applications. Additionally, they use DO-204AC (DO-15) packaging instead of P600, requiring board layout verification for mechanical compatibility.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitutes (5KP15CA, SA15CA, SA15CA-B, and 5KP15CA-TP) are ROHS3 compliant and maintain the same environmental and regulatory compliance as the original SLD15-018-B.

Q: What is the difference between P600 and DO-204AC packaging? A: P600 and DO-204AC (DO-15) are both axial through-hole packages but have different physical dimensions and lead spacing. P600 is used by the SLD15-018-B and 5KP15CA, while DO-204AC is used by SA15CA and SA15CA-B. Board layout and PCB hole spacing must be verified before substitution.

Q: Can the 5KP15CA-TP be used in place of the SLD15-018-B? A: The 5KP15CA-TP maintains equivalent voltage specifications and 5000W power rating. However, it uses R-6 axial packaging with unspecified peak pulse current. Board-level compatibility must be verified for package geometry and lead spacing before implementation.

Q: Do all substitutes operate across the same temperature range? A: Yes. All substitute parts operate across the identical temperature range of -55°C to 175°C (TJ), matching the SLD15-018-B specification.