P4SMA85A BK Equivalent & Substitute Parts

Part Overview

The P4SMA85A BK is a Transient Voltage Suppressor (TVS) diode manufactured by Central Semiconductor Corp, designed for general-purpose overvoltage protection in surface-mount applications. This component features an 85V reverse standoff voltage with a 137V maximum clamping voltage and 2.9A peak pulse current capability in a compact SMA package.

The P4SMA85A BK is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

P4SMA85A BK

Central Semiconductor CorpIn Stock: 791P4SMA85A BK Datasheet

Current PartRFQ

SMAJ85A-13-F

Diodes IncorporatedIn Stock: 12439SMAJ85A-13-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA85A BK is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Breakdown (Min): 94.4V
• Voltage - Clamping (Max) @ Ipp: 137V
• Current - Peak Pulse (10/1000µs): 2.9A
• Power - Peak Pulse: 400W
• Unidirectional Channels: 1
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C (TJ)

The SMAJ85A-13-F from Diodes Incorporated meets all specified electrical and mechanical parameters, making it a direct functional equivalent. This substitute maintains identical voltage ratings, current handling, power dissipation, package configuration, and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

The SMAJ85A-13-F is the recommended substitute for the obsolete P4SMA85A BK. This selection is based on:

• Complete electrical parameter equivalence across all voltage, current, and power specifications
• Identical package and mounting configuration (DO-214AC, SMA surface mount)
• Active product status with established supply chain availability (12,332 pcs in stock versus 740 pcs for the original part)
• Compliance certifications: RoHS3 Compliant, REACH Unaffected
• Equivalent moisture sensitivity rating and thermal operating range

The substitute part maintains full functional compatibility with existing circuit designs and PCB layouts without requiring design modifications.

Frequently Asked Questions (FAQ)

Q: Can SMAJ85A-13-F be used as a direct replacement for P4SMA85A BK without circuit modifications?

A: Yes. The SMAJ85A-13-F is electrically and mechanically equivalent. All voltage ratings, current specifications, power dissipation, package type, and thermal characteristics are identical. No circuit or PCB layout changes are required.

Q: What is the primary reason for substitution?

A: The P4SMA85A BK is classified as obsolete. The SMAJ85A-13-F is an active product with reliable supply availability, ensuring long-term component sourcing for production and maintenance.

Q: Are there any compliance or certification differences?

A: The SMAJ85A-13-F carries RoHS3 Compliance and REACH Unaffected certifications. Both parts share the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: Does the packaging format differ between these parts?

A: The P4SMA85A BK packaging format is not specified in available data. The SMAJ85A-13-F is supplied in Tape & Reel (TR) format. Both use the identical DO-214AC, SMA package case. Verify packaging requirements for your procurement process.

Q: Are there other equivalent parts available?

A: The SMAJ85A-13-F is the primary direct equivalent listed. Additional variants within the SMAJ85 series may exist with different packaging or supplier configurations, but SMAJ85A-13-F provides the most direct functional match.