3KP100CA-B Equivalent & Substitute Parts

Part Overview

The 3KP100CA-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This bidirectional zener diode features a 100V reverse standoff voltage with 162V maximum clamping voltage and 18.5A peak pulse current capability in a through-hole P600 axial package. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

3KP100CA-B

Littelfuse Inc.In Stock: 11423KP100CA-B Datasheet

Current PartRFQ

5KP100CA-B

Littelfuse Inc.In Stock: 8655KP100CA-B Datasheet

DirectRFQ

3KP100CA-TP

Micro Commercial CoIn Stock: 10553KP100CA-TP Datasheet

MFR RecommendedRFQ

5KP100CAE3/TR13

Microchip TechnologyIn Stock: 7345KP100CAE3/TR13 Datasheet

MFR RecommendedRFQ

5KP100CE3/TR13

Microchip TechnologyIn Stock: 8795KP100CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP100CA-B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff: 100V (required match)
• Voltage - Clamping (Max) @ Ipp: 162V or 179V (acceptable range for transient suppression)
• Current - Peak Pulse: minimum 18.5A (equal or greater capacity)
• Power - Peak Pulse: minimum 3000W (equal or greater capacity)
• Operating Temperature Range: -55°C ~ 175°C (required match)
• Type: Zener (required match)
• Bidirectional Channels: 1 (required match)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole (required match)
• Package / Case: P600 or R-6 Axial (compatible footprints)

Substitute parts are grouped into two categories: direct electrical equivalents with identical clamping voltage (162V) and higher-power variants with acceptable clamping voltage variance (179V maximum).

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalent (Identical Specifications): The 3KP100CA-TP manufactured by Micro Commercial Co provides pin-for-pin electrical equivalence with identical voltage and current ratings. This part is active and suitable for direct replacement in existing designs. Package compatibility requires verification: the R-6 axial package has the same lead spacing as P600 but may have dimensional variations affecting board layout.

Higher-Power Alternatives (Enhanced Capability): The 5KP100CA-B (Littelfuse Inc.), 5KP100CAE3/TR13 (Microchip Technology), and 5KP100CE3/TR13 (Microchip Technology) offer increased peak pulse current and power dissipation capacity while maintaining the 100V reverse standoff voltage. These parts are active and ROHS3 compliant. The 5KP100CAE3/TR13 and 5KP100CE3/TR13 are supplied in Tape & Reel packaging, suitable for automated assembly. The 5KP100CE3/TR13 features a higher clamping voltage (179V maximum) and should be evaluated for application-specific voltage margin requirements.

All substitute parts maintain the required operating temperature range (-55°C ~ 175°C) and through-hole mounting configuration. Selection should be based on available inventory, packaging requirements (bulk versus tape & reel), and application-specific power dissipation margins.

Frequently Asked Questions (FAQ)

Q: Can the 3KP100CA-B be replaced with the 5KP100CA-B? A: Yes. The 5KP100CA-B maintains identical voltage specifications (100V reverse standoff, 162V clamping) and operating temperature range. The higher peak pulse current (31.5A versus 18.5A) and power rating (5kW versus 3kW) provide enhanced transient suppression capability. Both use the P600 axial package and are through-hole mounted.

Q: What is the difference between 5KP100CAE3/TR13 and 5KP100CE3/TR13? A: Both parts are manufactured by Microchip Technology with identical 100V reverse standoff voltage and 5kW power rating. The primary difference is clamping voltage: 5KP100CAE3/TR13 clamps at 162V maximum, while 5KP100CE3/TR13 clamps at 179V maximum. Selection depends on circuit voltage margin requirements. Both are supplied in Tape & Reel packaging.

Q: Is the 3KP100CA-TP package compatible with the original P600 footprint? A: The 3KP100CA-TP uses an R-6 axial package instead of P600. Both are through-hole axial packages with identical lead spacing, but physical dimensions may differ. Board layout verification is required before substitution.

Q: Are all substitute parts RoHS3 compliant? A: The 5KP100CA-B, 5KP100CAE3/TR13, and 5KP100CE3/TR13 are confirmed ROHS3 compliant. The 3KP100CA-TP RoHS status is not specified in available documentation.

Q: Which substitute part should be selected for new designs? A: For new designs, select from active parts: 5KP100CA-B (Littelfuse Inc.), 3KP100CA-TP (Micro Commercial Co), 5KP100CAE3/TR13, or 5KP100CE3/TR13 (Microchip Technology). All are active products with confirmed availability and compliance certifications. Higher-power variants (5KP series) provide design margin for transient suppression applications.