SLD28-018-B Equivalent & Substitute Parts

Part Overview

The SLD28-018-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for transient overvoltage protection in electronic circuits. This bidirectional Zener diode operates with a 28V reverse standoff voltage and provides 5000W peak pulse power dissipation. The component is actively produced and carries AEC-Q101 automotive qualification, making it suitable for automotive and industrial applications requiring reliable surge suppression.

Equivalent and substitute parts are identified when they maintain identical or compatible electrical and mechanical specifications, enabling direct replacement in circuit designs without performance degradation.

Substiute Parts

SLD28-018-B

LittelfuseIn Stock: 867SLD28-018-B Datasheet

Current PartRFQ

5KP28CA-B

Littelfuse Inc.In Stock: 10765KP28CA-B Datasheet

DirectRFQ

5KP28CA

Diotec SemiconductorIn Stock: 68405KP28CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLD28-018-B are qualified based on the following critical parameters:

• Voltage - Reverse Standoff: 28V (exact match required)
• Voltage - Clamping (Max) @ Ipp: 45.4V (exact match required)
• Power - Peak Pulse: 5000W (exact match required)
• Package / Case: P600, Axial (exact match required)
• Mounting Type: Through Hole (exact match required)
• Bidirectional Channels: 1 (exact match required)
• Type: Zener (exact match required)

Substitutes are grouped into two categories: Direct Manufacturer Equivalents (same manufacturer, identical specifications) and Manufacturer-Recommended Alternatives (different manufacturer, specifications within acceptable tolerance).

Parameter Comparison

Engineering Selection Recommendations

5KP28CA-B (Littelfuse): This part is a direct equivalent to the SLD28-018-B, manufactured by the same supplier with identical electrical specifications and operating temperature range. Both parts carry ROHS3 compliance and REACH Unaffected status. Selection of this substitute provides equivalent performance with no design modifications required.

5KP28CA (Diotec Semiconductor): This part meets all critical electrical parameters with a minor variance in peak pulse current (110A versus 112.3A) and operating temperature minimum (-50°C versus -55°C). The part is actively produced and carries EAR99 classification. RoHS and REACH compliance status differs from the primary part. This substitute is suitable for applications where the lower temperature minimum and reduced peak pulse current specification do not conflict with circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can 5KP28CA-B be used as a direct replacement for SLD28-018-B?

A: Yes. Both parts are manufactured by Littelfuse with identical voltage ratings (28V standoff, 45.4V clamping), peak pulse current (112.3A), power dissipation (5000W), operating temperature range (-55 to 175°C), and P600 axial package. No circuit modifications are required.

Q: What is the difference between 5KP28CA-B and 5KP28CA?

A: Both parts share identical voltage and power specifications. The primary differences are manufacturer (Littelfuse versus Diotec), packaging format (Bulk versus Tape & Reel), peak pulse current (112.3A versus 110A), minimum operating temperature (-55°C versus -50°C), and compliance certifications (ROHS3/REACH Unaffected versus Not Applicable/Vendor Undefined).

Q: Is the 110A peak pulse current of 5KP28CA acceptable as a substitute?

A: The 5KP28CA specification of 110A peak pulse current is within 2.3% of the SLD28-018-B specification of 112.3A. Acceptability depends on circuit design margins and transient event severity. Applications with tight current margin requirements should verify compatibility with system specifications.

Q: Does packaging format affect electrical performance?

A: No. Bulk and Tape & Reel packaging formats do not affect electrical performance. The difference is in handling and assembly convenience. Bulk packaging is suitable for manual assembly or small-volume production; Tape & Reel is optimized for automated pick-and-place assembly.

Q: Are there temperature range considerations when substituting?

A: The SLD28-018-B and 5KP28CA-B both operate from -55 to 175°C. The 5KP28CA operates from -50 to 175°C. Applications requiring operation below -50°C must use SLD28-018-B or 5KP28CA-B.