3KP70CA-B Equivalent & Substitute Parts

Part Overview

The 3KP70CA-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This bidirectional Zener diode features a 70V reverse standoff voltage and 113V maximum clamping voltage, with a peak pulse current rating of 26.5A and 3000W peak pulse power dissipation capability. The device is housed in a P600 axial through-hole package and operates across a temperature range of -55°C to 175°C.

The 3KP70CA-B is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure continued availability for new designs, production continuity, and system reliability when the original part becomes unavailable.

Substiute Parts

3KP70CA-B

Littelfuse Inc.In Stock: 9163KP70CA-B Datasheet

Current PartRFQ

5KP70CA-B

Littelfuse Inc.In Stock: 6965KP70CA-B Datasheet

DirectRFQ

3KP70CA-TP

Micro Commercial CoIn Stock: 7173KP70CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP70CA-B are identified based on the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 70V
• Voltage - Clamping (Max) @ Ipp: 113V
• Voltage - Breakdown (Min): 77.8V
• Operating Temperature Range: -55°C ~ 175°C
• Mounting Type: Through Hole
• Bidirectional Channels: 1
• Type: Zener
• Applications: General Purpose

Substitute parts must maintain identical or functionally equivalent voltage specifications and temperature ratings. Package compatibility is evaluated based on through-hole axial mounting requirements. Current and power ratings may vary within the same voltage class, provided the substitute meets or exceeds the original specifications for the intended application.

Parameter Comparison

Engineering Selection Recommendations

The 5KP70CA-B (Littelfuse Inc.) is an active product with identical voltage specifications and package form factor (P600, Axial) to the 3KP70CA-B. This substitute provides higher peak pulse current (45.1A) and power dissipation (5000W) ratings, making it suitable for applications requiring equal or greater transient protection capability. Both parts are ROHS3 compliant and maintain the same operating temperature range.

The 3KP70CA-TP (Micro Commercial Co) is an active product with identical voltage and current specifications to the 3KP70CA-B. This substitute differs in package form factor, using an R-6 axial package instead of P600. The 3KP70CA-TP is REACH unaffected and maintains the same operating temperature range and electrical performance.

Selection between substitutes depends on package compatibility requirements within the target application. The 5KP70CA-B is recommended when P600 package compatibility is required. The 3KP70CA-TP is recommended when R-6 package compatibility is acceptable and Micro Commercial Co sourcing is preferred.

Frequently Asked Questions (FAQ)

Q: Can the 5KP70CA-B replace the 3KP70CA-B in all applications?

A: The 5KP70CA-B maintains identical voltage specifications (70V reverse standoff, 113V clamping) and package form factor (P600, Axial) as the 3KP70CA-B. The higher current and power ratings (45.1A, 5000W versus 26.5A, 3000W) make it suitable for applications requiring equal or greater transient protection. Package footprint compatibility is maintained.

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

A: Both P600 and R-6 are axial through-hole packages for TVS diodes. The packages differ in physical dimensions and lead configuration. Selection depends on PCB layout and mechanical mounting requirements specific to the target application.

Q: Are all substitute parts RoHS compliant?

A: The 5KP70CA-B is ROHS3 compliant. The 3KP70CA-TP RoHS status is not specified in the provided data. Compliance verification should be confirmed with the manufacturer or supplier for the 3KP70CA-TP if RoHS certification is a requirement.

Q: Can I use the 3KP70CA-TP as a direct replacement for the 3KP70CA-B?

A: The 3KP70CA-TP provides identical electrical specifications (70V reverse standoff, 113V clamping, 26.5A peak pulse current, 3000W power dissipation) and operating temperature range. The primary difference is the package form factor (R-6 versus P600). Direct replacement is possible if the R-6 package is compatible with the PCB layout and mechanical mounting requirements.

Q: What compliance certifications apply to these parts?

A: The 3KP70CA-B and 5KP70CA-B are ROHS3 compliant. The 3KP70CA-TP is REACH unaffected. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.