5KP190C-B Transient Voltage Suppressor Diode - Equivalent & Substitute Parts

Part Overview

The 5KP190C-B is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 190V reverse standoff voltage with a maximum clamping voltage of 325.5V at peak pulse current, housed in a P600 axial through-hole package rated for 5000W peak pulse power dissipation.

The 5KP190C-B is classified as obsolete. Equivalent and substitute parts are available from Littelfuse and alternative manufacturers, offering active product status with comparable or enhanced electrical characteristics and improved availability.

Substiute Parts

5KP190C-B

Littelfuse Inc.In Stock: 11855KP190C-B Datasheet

Current PartRFQ

5KP190CA

Littelfuse Inc.In Stock: 24035KP190CA Datasheet

DirectRFQ

5KP190CA-B

LittelfuseIn Stock: 10265KP190CA-B Datasheet

DirectRFQ

5KP190CA-TP

Micro Commercial CoIn Stock: 10155KP190CA-TP Datasheet

MFR RecommendedRFQ

AK10-190C-BP

Micro Commercial CoIn Stock: 866AK10-190C-BP Datasheet

MFR RecommendedRFQ

AK6-190C-BP

Micro Commercial CoIn Stock: 867AK6-190C-BP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP190C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff: 190V (exact match required)
• Voltage - Clamping (Max) @ Ipp: 325.5V or lower (lower values acceptable for reduced transient stress)
• Power - Peak Pulse: 5000W minimum
• Mounting Type: Through Hole
• Operating Temperature: -55°C minimum to 150°C minimum
• Bidirectional Channels: 1
• Type: Zener

Substitute parts are grouped into two categories:

Category 1: Direct Littelfuse Equivalents (5KP Series) Parts 5KP190CA, 5KP190CA-B, and 5KP190CA-TP maintain the same reverse standoff voltage (190V) and peak pulse power (5000W). These parts feature a lower maximum clamping voltage (310V), which provides tighter voltage regulation during transient events. Packaging variants differ (Cut Tape, Bulk, and alternative case styles) but maintain through-hole axial configuration.

Category 2: Alternative Manufacturer High-Current TVS (AK Series) Parts AK6-190C-BP and AK10-190C-BP are manufactured by Micro Commercial Co and feature the same 190V reverse standoff voltage with a 290V maximum clamping voltage. These components are rated for significantly higher peak pulse currents (6kA and 10kA respectively, measured at 8/20µs pulse width) compared to the 5KP series. Operating temperature range is -55°C to 150°C.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Manufacturer): Select 5KP190CA or 5KP190CA-B for direct substitution. Both parts maintain Littelfuse manufacturing, identical reverse standoff voltage (190V), and equivalent peak pulse power rating (5000W). The 5KP190CA-B is available in bulk packaging, while 5KP190CA is supplied in cut tape. Both are active products with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory compliance.

For Package Variant (Littelfuse, Alternative Case Style): The 5KP190CA-TP is supplied by Micro Commercial Co in cut tape packaging with an R-6 axial case style instead of P600. This part maintains electrical equivalence but requires PCB layout adjustment due to different package dimensions. Select this option only if board space constraints or specific assembly equipment compatibility necessitate the R-6 package.

For High-Current Applications: Select AK6-190C-BP or AK10-190C-BP when the application requires higher peak pulse current handling (6kA or 10kA respectively, measured at 8/20µs pulse width). These parts feature lower maximum clamping voltage (290V), providing superior transient suppression. Note the reduced maximum operating temperature (150°C vs. 175°C) and different package geometry (right angle bend, 24.15mm center). These parts are suitable for power line and industrial protection applications requiring enhanced current capacity.

All substitute parts are active products with ROHS3 compliance and adequate inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use 5KP190CA as a direct replacement for 5KP190C-B? A: Yes. Both parts share the same 190V reverse standoff voltage, 5000W peak pulse power rating, and through-hole axial mounting. The 5KP190CA features a lower maximum clamping voltage (310V vs. 325.5V), which is acceptable for transient suppression applications. The 5KP190CA is an active product with superior availability compared to the obsolete 5KP190C-B.

Q: What is the difference between 5KP190CA and 5KP190CA-B? A: Both parts are electrically identical. The difference is packaging: 5KP190CA is supplied in cut tape (CT), while 5KP190CA-B is supplied in bulk (BP). Select based on your assembly process requirements and order quantity.

Q: Can I use AK6-190C-BP or AK10-190C-BP instead of the 5KP series? A: Yes, with design considerations. The AK series maintains the 190V reverse standoff voltage but features a lower maximum clamping voltage (290V) and significantly higher peak pulse current ratings (6kA or 10kA at 8/20µs). The operating temperature maximum is 150°C instead of 175°C. The package geometry differs (right angle bend vs. standard axial). Select the AK series only if your application requires the higher current capacity and your PCB layout accommodates the different package dimensions.

Q: Why does 5KP190CA-TP have a different package designation (R-6 vs. P600)? A: The R-6 package is an alternative axial case style offered by Micro Commercial Co. Electrical performance is equivalent to the P600 package, but physical dimensions differ. Verify PCB footprint compatibility before selecting this part.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of the lower clamping voltage in substitute parts? A: Lower maximum clamping voltage (310V or 290V vs. 325.5V) indicates tighter voltage regulation during transient events. This is beneficial for protecting sensitive downstream components. The lower clamping voltage does not affect compatibility as long as the protected circuit can tolerate the specified maximum voltage.