3KP100C-B Equivalent & Substitute Parts

Part Overview

The 3KP100C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional zener diode features a 100V reverse standoff voltage with a 170.1V maximum clamping voltage and 18.5A peak pulse current capability in a through-hole P600 axial package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, repairs, and new designs requiring compatible protection solutions.

Substiute Parts

3KP100C-B

Littelfuse Inc.In Stock: 10153KP100C-B Datasheet

Current PartRFQ

5KP100CA-B

Littelfuse Inc.In Stock: 8655KP100CA-B Datasheet

DirectRFQ

15KPA100CAE3/TR13

Microchip TechnologyIn Stock: 75015KPA100CAE3/TR13 Datasheet

MFR RecommendedRFQ

15KPA100CE3/TR13

Microchip TechnologyIn Stock: 65515KPA100CE3/TR13 Datasheet

MFR RecommendedRFQ

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

BZW50-100B

STMicroelectronicsIn Stock: 1351BZW50-100B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP100C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 100V
• Voltage - Breakdown (Min): 105.3V minimum
• Voltage - Clamping (Max) @ Ipp: 170.1V maximum
• Current - Peak Pulse (10/1000µs): 18.5A minimum
• Power - Peak Pulse: 3000W minimum
• Mounting Type: Through Hole
• Package / Case: P600 or R-6 Axial
• Operating Temperature: -55°C ~ 175°C (TJ)
• Type: Zener, Bidirectional

Substitute parts must maintain the same reverse standoff voltage (100V) and support equivalent or higher peak pulse current and power dissipation ratings. Package compatibility includes both P600 and R-6 axial configurations. All substitutes must operate within the specified temperature range and maintain zener diode functionality for general-purpose transient voltage suppression.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain the 100V reverse standoff voltage specification required for the 3KP100C-B application. Selection among substitutes depends on specific circuit requirements and package constraints:

Direct Package Match (P600 Axial): The 5KP100CA-B, 5KP100CAE3/TR13, and 5KP100CE3/TR13 provide direct P600 package compatibility with higher peak pulse current and power dissipation ratings (5000W vs. 3000W), offering enhanced protection margins. The 15KPA100CAE3/TR13 and 15KPA100CE3/TR13 provide maximum power dissipation (15000W) for applications requiring superior transient suppression.

Alternative Package (R-6 Axial): The 3KP100CA-TP and BZW50-100B offer R-6 axial package compatibility. The 3KP100CA-TP maintains the 3000W power rating and 18.5A peak pulse current identical to the original part. The BZW50-100B provides significantly higher peak pulse current (263A at 8/20µs) and power dissipation (5000W) for demanding applications.

All substitute parts are ROHS3 compliant and active products, ensuring long-term availability and regulatory compliance. Selection should account for PCB layout constraints, package footprint requirements, and circuit protection margin specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher peak pulse current rating than the original 3KP100C-B?

A: Yes. Substitute parts with higher peak pulse current ratings (such as 5KP100CA-B at 31.5A or 15KPA100CAE3/TR13 at 93.6A) provide equivalent or superior protection. The higher rating does not degrade circuit performance; it only increases the transient suppression capability margin.

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

A: Both P600 and R-6 are through-hole axial packages for TVS diodes. The primary difference is physical dimensions and lead spacing. P600 and R-6 packages are not mechanically interchangeable on the same PCB footprint. Verify your PCB design specifications before selecting a substitute with a different package designation.

Q: Are all substitute parts ROHS3 compliant like the original 3KP100C-B?

A: All listed substitutes except 3KP100CA-TP are explicitly ROHS3 compliant. The 3KP100CA-TP does not specify RoHS status in the provided data. Verify RoHS compliance requirements with your procurement or regulatory team before final part selection.

Q: Why do some substitutes have higher clamping voltages (e.g., BZW50-100B at 228V)?

A: Clamping voltage variation occurs due to manufacturing process differences between manufacturers and product series. The BZW50-100B's higher clamping voltage (228V) still maintains the 100V reverse standoff specification. Higher clamping voltage may be acceptable depending on downstream circuit component voltage ratings. Verify circuit tolerance specifications before substitution.

Q: Can I substitute the 3KP100C-B with the 15KPA100CE3/TR13 if clamping voltage data is not provided?

A: The 15KPA100CE3/TR13 specification sheet does not include clamping voltage or peak pulse current values in the provided data. While it maintains the 100V reverse standoff voltage and 15000W power rating, incomplete electrical characterization data should be resolved through the manufacturer datasheet before final circuit design approval.

Q: What is the significance of the "E3/TR13" designation in part numbers like 5KP100CAE3/TR13?

A: The "E3/TR13" suffix indicates the specific product variant and tape & reel packaging configuration. This designation ensures traceability to the exact manufacturing specification and packaging format. When ordering substitutes, specify the complete part number including the suffix to receive the correct product variant.