SLD20-018-B Equivalent & Substitute Parts

Part Overview

The SLD20-018-B is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for through-hole mounting in P600 axial package configuration. This component provides transient overvoltage protection with a 20V reverse standoff voltage and 32.4V maximum clamping voltage. The part is actively produced, AEC-Q101 qualified for automotive applications, and maintains full RoHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

SLD20-018-B

Littelfuse Inc.In Stock: 1095SLD20-018-B Datasheet

Current PartRFQ

5KP20CA

LittelfuseIn Stock: 43125KP20CA Datasheet

MFR RecommendedRFQ

5KP20CA-TP

Micro Commercial CoIn Stock: 15375KP20CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLD20-018-B are qualified based on electrical parameter equivalence and mechanical compatibility. The critical parameters determining substitution eligibility are:

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Clamping (Max) @ Ipp: 32.4V
• Power - Peak Pulse: 5000W
• Operating Temperature Range: -55°C to 175°C
• Mounting Type: Through Hole
• Bidirectional Channels: 1
• Type: Zener

The identified substitutes maintain identical electrical performance specifications and support the same through-hole mounting methodology. Package variations (P600 vs. R-6 axial) are permitted within this substitution group as both are axial through-hole configurations compatible with standard PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status and full regulatory compliance under RoHS3 and REACH standards. The SLD20-018-B and 5KP20CA are both manufactured by Littelfuse Inc. and share identical electrical specifications with P600 axial package configuration. The 5KP20CA-TP, manufactured by Micro Commercial Co, provides electrical equivalence with an R-6 axial package variant.

Selection between these parts should be based on:

• Packaging availability and PCB layout compatibility (P600 vs. R-6 axial footprints)
• Supplier inventory and lead time requirements
• Procurement cost considerations
• Existing qualification status within your design documentation

All parts support the same operating temperature range (-55°C to 175°C) and maintain equivalent transient suppression performance for 20V standoff applications.

Frequently Asked Questions (FAQ)

Q: Can 5KP20CA-TP replace SLD20-018-B in existing designs?

A: Yes. The 5KP20CA-TP provides electrical equivalence across all critical parameters. The primary consideration is package compatibility. The 5KP20CA-TP uses R-6 axial configuration while the SLD20-018-B uses P600 axial configuration. Both are through-hole axial packages; verify PCB footprint compatibility before substitution.

Q: What is the difference between P600 and R-6 axial packages?

A: Both P600 and R-6 are through-hole axial package styles for diodes. The designation refers to the specific physical dimensions and lead configuration. Verify your PCB layout supports the substitute package before implementation.

Q: Are all three parts suitable for automotive applications?

A: The SLD20-018-B carries AEC-Q101 automotive qualification. The 5KP20CA and 5KP20CA-TP are listed as active products with equivalent electrical specifications and full RoHS3 compliance. Confirm automotive qualification requirements with your design specifications and supplier documentation.

Q: What parameters must remain identical for substitution?

A: Voltage - Reverse Standoff (20V), Voltage - Clamping (32.4V), Power - Peak Pulse (5000W), Operating Temperature Range (-55°C to 175°C), and Bidirectional Zener type must remain constant. Package configuration (P600 vs. R-6) may vary provided PCB footprint compatibility is confirmed.

Q: Is there a preferred substitute between 5KP20CA and 5KP20CA-TP?

A: Both are electrically equivalent. The 5KP20CA maintains identical P600 package configuration to the SLD20-018-B. The 5KP20CA-TP offers an alternative with R-6 package. Selection depends on packaging availability, inventory status, and PCB layout requirements.