3KP11C-B Equivalent & Substitute Parts

Part Overview

The 3KP11C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional zener diode features an 11V reverse standoff voltage with a 19.11V maximum clamping voltage and 164.8A peak pulse current capability in a P600 axial through-hole package. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

3KP11C-B

Littelfuse Inc.In Stock: 7913KP11C-B Datasheet

Current PartRFQ

5KP11CA-B

Littelfuse Inc.In Stock: 8635KP11CA-B Datasheet

DirectRFQ

3KP11CA-TP

Micro Commercial CoIn Stock: 9853KP11CA-TP Datasheet

MFR RecommendedRFQ

5KP11CA-TP

Micro Commercial CoIn Stock: 7795KP11CA-TP Datasheet

MFR RecommendedRFQ

5KP11CAE3/TR13

Microchip TechnologyIn Stock: 8215KP11CAE3/TR13 Datasheet

MFR RecommendedRFQ

5KP11CE3/TR13

Microchip TechnologyIn Stock: 6655KP11CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP11C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff: 11V (all substitutes must match)
• Voltage - Clamping (Max) @ Ipp: 19.11V or lower (substitutes with lower clamping voltages are acceptable)
• Current - Peak Pulse: 164.8A or higher (substitutes must meet or exceed this rating)
• Power - Peak Pulse: 3000W or higher (substitutes must meet or exceed this rating)
• Operating Temperature Range: -55°C to 175°C (all substitutes must match or exceed)
• Mounting Type: Through Hole (all substitutes must match)
• RoHS Compliance: ROHS3 Compliant (all substitutes must maintain compliance)

Substitutes are grouped into two categories: direct replacements with identical P600 packaging and alternative options with R-6 packaging that maintain electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All listed substitutes maintain the critical 11V reverse standoff voltage and operating temperature range required for compatibility with the 3KP11C-B application. Selection should be based on the following factors:

P600 Package Compatibility (Direct Footprint Match):

• 5KP11CA-B (Littelfuse Inc.): Active product status with identical P600 packaging. Provides enhanced performance with 280.2A peak pulse current and 5000W power rating. Lower clamping voltage (18.2V) improves transient suppression characteristics.
• 5KP11CAE3/TR13 (Microchip Technology): Active product status with P600 packaging. Delivers 275A peak pulse current and 5000W power rating with 18.2V clamping voltage. Tape & Reel packaging suitable for automated assembly.
• 5KP11CE3/TR13 (Microchip Technology): Active product status with P600 packaging. Provides 249A peak pulse current and 5000W power rating with 20.1V clamping voltage, closest to original specifications.

R-6 Package Alternative (PCB Layout Modification Required):

• 3KP11CA-TP (Micro Commercial Co): Active product status with R-6 packaging. Maintains 164.8A peak pulse current and 3000W power rating matching original specifications. Requires PCB footprint modification.
• 5KP11CA-TP (Micro Commercial Co): Active product status with R-6 packaging. Provides 5000W power rating with 18.2V clamping voltage. Peak pulse current not specified; verification required before selection.

All substitutes maintain ROHS3 compliance where specified, ensuring regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use 5KP11CA-B as a direct replacement for 3KP11C-B? A: Yes. The 5KP11CA-B maintains the identical 11V reverse standoff voltage, P600 axial package, and operating temperature range. It provides superior performance with higher peak pulse current (280.2A vs 164.8A) and power rating (5000W vs 3000W), with a lower clamping voltage (18.2V vs 19.11V) that improves transient suppression.

Q: What is the difference between P600 and R-6 packages? A: Both are axial through-hole packages for TVS diodes. P600 and R-6 differ in physical dimensions and lead spacing. Direct footprint compatibility exists only within the same package type. R-6 alternatives require PCB layout modification.

Q: Are all substitutes RoHS compliant? A: All substitutes listed with specified RoHS status are ROHS3 compliant. The 3KP11CA-TP does not specify RoHS status in the provided data; verification with the manufacturer is recommended before selection.

Q: Why do some substitutes have higher power ratings? A: The 5KP series substitutes (5KP11CA-B, 5KP11CA-TP, 5KP11CAE3/TR13, 5KP11CE3/TR13) are rated for 5000W peak pulse power compared to the original 3000W rating. This represents enhanced capability and does not prevent substitution; the part will operate safely within the original 3000W application envelope.

Q: Which substitute is best for new designs? A: Selection depends on packaging requirements and supply chain considerations. For P600 package compatibility, 5KP11CAE3/TR13 (Microchip Technology) or 5KP11CA-B (Littelfuse Inc.) are recommended active products. Both maintain full electrical compatibility and regulatory compliance.

Q: Can I substitute a part with a lower clamping voltage? A: Yes. Lower clamping voltages (18.2V vs 19.11V) provide improved transient suppression performance. All listed substitutes with 18.2V clamping voltage are electrically compatible with the original 3KP11C-B application.