P4SMA70A BK Equivalent & Substitute Parts

Part Overview

The P4SMA70A BK is a Transient Voltage Suppressor (TVS) diode manufactured by Central Semiconductor Corp, designed for general-purpose overvoltage protection applications. This component features a 70V reverse standoff voltage with a 113V maximum clamping voltage and 4.6A peak pulse current capability in a surface-mount SMA package.

The P4SMA70A BK is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this TVS diode specification is required.

Substiute Parts

P4SMA70A BK

Central Semiconductor CorpIn Stock: 1137P4SMA70A BK Datasheet

Current PartRFQ

SMAJ70A-13-F

Diodes IncorporatedIn Stock: 7864SMAJ70A-13-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA70A BK is determined by matching the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff: 70V
• Voltage - Breakdown (Min): 77.8V
• Voltage - Clamping (Max) @ Ipp: 113V
• Current - Peak Pulse (10/1000µs): 4.6A
• Power - Peak Pulse: 400W
• Type: Zener, Unidirectional
• Package / Case: DO-214AC, SMA (surface mount)
• Operating Temperature Range: -55°C ~ 150°C (TJ)

The SMAJ70A-13-F from Diodes Incorporated meets all specified electrical and mechanical parameters, making it a direct functional equivalent for the obsolete P4SMA70A BK.

Parameter Comparison

Engineering Selection Recommendations

The SMAJ70A-13-F is the qualified substitute for the P4SMA70A BK based on the following factors:

• All electrical parameters match exactly across voltage ratings, current capacity, and power dissipation specifications
• Both components use identical package geometry (DO-214AC, SMA) and mounting type (surface mount), ensuring PCB compatibility without layout modifications
• The SMAJ70A-13-F maintains active product status with current manufacturing availability, whereas the P4SMA70A BK is obsolete
• The substitute part is ROHS3 Compliant and REACH Unaffected, meeting modern regulatory requirements
• Moisture sensitivity classification is identical (MSL 1), ensuring equivalent handling and storage requirements

Frequently Asked Questions (FAQ)

Q: Can the SMAJ70A-13-F be used as a direct replacement for the P4SMA70A BK without PCB modifications?

A: Yes. Both components share identical electrical specifications and the same DO-214AC SMA package geometry. No PCB layout changes are required for substitution.

Q: What is the difference between the P4SMA70A BK and SMAJ70A-13-F?

A: The primary difference is manufacturer and product status. The P4SMA70A BK (Central Semiconductor) is obsolete, while the SMAJ70A-13-F (Diodes Incorporated) is an active product with current manufacturing. All electrical and mechanical parameters are identical.

Q: Are there any compliance or certification differences between these parts?

A: The SMAJ70A-13-F includes ROHS3 Compliance and REACH Unaffected certifications. Both parts carry the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: Does packaging format affect substitution?

A: The P4SMA70A BK is supplied in standard packaging, while the SMAJ70A-13-F is available in Tape & Reel (TR) format. Both formats contain identical components; the difference is in bulk handling and automated assembly compatibility.

Q: What is the operating temperature range for both parts?

A: Both the P4SMA70A BK and SMAJ70A-13-F operate across -55°C to 150°C junction temperature, ensuring equivalent thermal performance in all application environments.