3KP170CA-B Equivalent & Substitute Parts

Part Overview

The 3KP170CA-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This component features a 170V reverse standoff voltage with a 275V maximum clamping voltage and 10.9A peak pulse current capability in a through-hole P600 axial package. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP170CA-B

Littelfuse Inc.In Stock: 10893KP170CA-B Datasheet

Current PartRFQ

5KP170CA-B

Littelfuse Inc.In Stock: 9325KP170CA-B Datasheet

DirectRFQ

3KP170CA-TP

Micro Commercial CoIn Stock: 7653KP170CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 3KP170CA-B are qualified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 170V
• Voltage - Breakdown (Min): 189V
• Voltage - Clamping (Max) @ Ipp: 275V
• Operating Temperature Range: -55°C to 175°C (TJ)
• Type: Zener, Bidirectional

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600 or R-6 Axial

Regulatory Compliance:

• RoHS3 Compliant

The substitute parts identified maintain identical voltage specifications and thermal operating ranges, ensuring functional equivalence in transient protection circuits. Package variations (P600 versus R-6) are acceptable as both are axial through-hole configurations with compatible footprints.

Parameter Comparison

Engineering Selection Recommendations

5KP170CA-B (Littelfuse Inc.): This substitute maintains identical voltage and thermal specifications while offering increased peak pulse current (18.5A) and power dissipation (5000W) capabilities. The component is in active production status with ROHS3 compliance confirmed. The P600 axial package provides direct mechanical compatibility with the original design footprint.

3KP170CA-TP (Micro Commercial Co): This substitute provides electrical equivalence with matching voltage, current, and power specifications to the original 3KP170CA-B. The component is in active production status. The R-6 axial package is mechanically compatible as a through-hole axial configuration, though PCB layout verification is required to confirm footprint compatibility with existing designs.

Both substitutes are qualified for active procurement and support ongoing system requirements where the obsolete 3KP170CA-B is no longer available.

Frequently Asked Questions (FAQ)

Q: Can the 5KP170CA-B be used as a direct replacement for the 3KP170CA-B?

A: Yes. The 5KP170CA-B maintains identical voltage specifications (170V standoff, 275V clamping) and operating temperature range (-55°C to 175°C). The increased current rating (18.5A versus 10.9A) and power dissipation (5000W versus 3000W) provide enhanced transient protection capability. The P600 axial package is mechanically identical, enabling direct PCB substitution.

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

A: Both P600 and R-6 are axial through-hole package styles for diodes. The primary difference is the physical form factor and lead spacing. While both are compatible with through-hole mounting, PCB layout verification is necessary to confirm that the R-6 package footprint aligns with existing P600 pad patterns.

Q: Are both substitute parts RoHS compliant?

A: The 5KP170CA-B is confirmed ROHS3 compliant. The 3KP170CA-TP RoHS status is not specified in the available documentation. Compliance verification with the component supplier is recommended for applications with RoHS requirements.

Q: Can I use the 3KP170CA-TP if my design requires the P600 package?

A: The 3KP170CA-TP uses the R-6 axial package instead of P600. While both are through-hole axial configurations, the physical dimensions and lead spacing differ. PCB layout compatibility must be verified before substitution.

Q: What is the inventory status of these substitute parts?

A: The 5KP170CA-B has 836 units in stock. The 3KP170CA-TP has 748 units in stock. Both are available as new original components.