3KP5.0C-B Equivalent & Substitute Parts

Part Overview

The 3KP5.0C-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 5V reverse standoff voltage and 9.66V maximum clamping voltage, with a peak pulse power rating of 3000W. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP5.0C-B

Littelfuse Inc.In Stock: 12253KP5.0C-B Datasheet

Current PartRFQ

5KP5.0CA-B

Littelfuse Inc.In Stock: 11315KP5.0CA-B Datasheet

DirectRFQ

5KP5.0CA-TP

Micro Commercial CoIn Stock: 77595KP5.0CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP5.0C-B is determined by the following critical electrical and mechanical parameters:

• Voltage Rating: Reverse standoff voltage of 5V and breakdown voltage range (6.03V minimum) define the protection threshold
• Clamping Voltage: Maximum clamping voltage at peak pulse current determines transient suppression effectiveness
• Peak Pulse Current & Power: Current handling (326.1A) and power dissipation (3000W) establish the device's surge protection capability
• Package & Mounting: Through-hole P600 axial package ensures mechanical and electrical compatibility with existing PCB designs
• Operating Temperature Range: -55°C to 175°C junction temperature compatibility
• Compliance: ROHS3 compliance and MSL rating (1 - Unlimited) for manufacturing and storage

Substitute parts must maintain compatibility across these parameters within acceptable engineering tolerances for the application.

Parameter Comparison

Engineering Selection Recommendations

5KP5.0CA-B is the primary substitute for the 3KP5.0C-B. Both devices are manufactured by Littelfuse Inc., share identical voltage ratings (5V reverse standoff), and maintain the same operating temperature range. The 5KP5.0CA-B is currently in active production status, ensuring long-term availability. The substitute offers enhanced performance with 5000W peak pulse power compared to the original 3000W rating, while maintaining ROHS3 compliance and MSL 1 rating. The P600 axial package provides direct mechanical compatibility with existing designs.

5KP5.0CA-TP is an alternative substitute manufactured by Micro Commercial Co, also in active production. This device maintains the same 5V voltage rating and operating temperature range with 5000W peak pulse power capability. The primary distinction is the R-6 axial package, which differs from the original P600 package. While both are through-hole axial configurations, PCB footprint verification is necessary to confirm mechanical fit. ROHS3 compliance and MSL 1 rating are maintained.

Selection between 5KP5.0CA-B and 5KP5.0CA-TP should be based on package compatibility with existing PCB designs and supplier availability.

Frequently Asked Questions (FAQ)

Q: Can the 5KP5.0CA-B directly replace the 3KP5.0C-B without PCB modifications?

A: Yes. Both devices use the P600 axial through-hole package with identical pinout and mechanical dimensions. No PCB layout changes are required.

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

A: Both are through-hole axial packages for TVS diodes. The P600 and R-6 represent different package designations with potentially different physical dimensions. PCB footprint compatibility must be confirmed before selecting the 5KP5.0CA-TP substitute.

Q: Are the voltage ratings of the substitute parts compatible with the original design?

A: Yes. All substitute parts maintain the 5V reverse standoff voltage and operate within the same voltage range as the 3KP5.0C-B. The clamping voltages (9.2V for substitutes vs. 9.66V for the original) remain within acceptable transient suppression parameters.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. Both 5KP5.0CA-B and 5KP5.0CA-TP are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original part's compliance profile.

Q: Why do the substitute parts have higher power ratings?

A: The 5KP series devices are rated for 5000W peak pulse power compared to the 3KP series 3000W rating. This represents an enhancement in surge handling capability and does not affect compatibility with the original design.

Q: Is the 3KP5.0C-B still available for procurement?

A: The 3KP5.0C-B is classified as obsolete. Substitute parts in active production status (5KP5.0CA-B or 5KP5.0CA-TP) are recommended for new procurement and long-term design support.