P4SMA68A-Q Equivalent & Substitute Parts

Part Overview

The P4SMA68A-Q is an active Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for telecom applications requiring transient voltage protection. This unidirectional zener diode operates in the 58.1V reverse standoff voltage range with a 92V maximum clamping voltage and 4.5A peak pulse current capability. The component is packaged in DO-214AC (SMA) surface mount format and meets automotive-grade AEC-Q101 qualification standards.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter ranges, ensuring functional interchangeability in circuit applications.

Substiute Parts

P4SMA68A-Q

Bourns Inc.In Stock: 824P4SMA68A-Q Datasheet

Current PartRFQ

SMAJE58AH

Eaton - Electronics DivisionIn Stock: 5819SMAJE58AH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4SMA68A-Q is determined by strict alignment of the following electrical and mechanical parameters:

Electrical Criteria:

• Reverse standoff voltage within 58V to 58.1V range
• Breakdown voltage minimum at or above 64.4V
• Clamping voltage maximum between 92V and 93.6V
• Peak pulse current rating of 4.3A or higher
• Peak pulse power rating of 400W or equivalent

Mechanical & Compliance Criteria:

• Surface mount package format (DO-214AC / SMA)
• Unidirectional zener diode configuration
• Operating temperature range of -55°C to 150°C (TJ)
• Automotive grade with AEC-Q101 qualification
• RoHS3 compliance and REACH unaffected status

The SMAJE58AH from Eaton - Electronics Division meets all substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: P4SMA68A-Q

The P4SMA68A-Q remains the specified component for new designs and production runs where Bourns supply is available. This part carries active product status, AEC-Q101 automotive qualification, and ROHS3 compliance. Current inventory of 715 units supports immediate procurement.

Substitute Part: SMAJE58AH

The SMAJE58AH from Eaton - Electronics Division is qualified as a direct substitute when P4SMA68A-Q availability is constrained. This part maintains equivalent electrical performance within specified tolerance bands, identical mechanical compatibility, and matching automotive-grade AEC-Q101 certification. The SMAJE58AH carries higher inventory availability (5766 units) and identical compliance certifications (ROHS3, REACH unaffected).

Both parts are active products with unrestricted moisture sensitivity levels and identical operating temperature ranges. Selection between these parts is driven by supply chain availability and lead time requirements rather than functional performance differences.

Frequently Asked Questions (FAQ)

Q: Can SMAJE58AH be used as a direct replacement for P4SMA68A-Q in existing assemblies?

A: Yes. Both parts share identical package format (DO-214AC / SMA), mounting type (surface mount), operating temperature range (-55°C to 150°C), and automotive-grade AEC-Q101 qualification. Electrical parameters fall within compatible tolerance ranges for transient voltage suppression applications.

Q: What is the difference in peak pulse current between these parts?

A: The P4SMA68A-Q is rated at 4.5A peak pulse current, while the SMAJE58AH is rated at 4.3A. Both parts deliver 400W peak pulse power. The SMAJE58AH provides adequate protection for telecom applications within the specified voltage clamping range (93.6V maximum).

Q: Are both parts compliant with automotive and environmental standards?

A: Yes. Both P4SMA68A-Q and SMAJE58AH carry automotive-grade classification, AEC-Q101 qualification, ROHS3 compliance, and REACH unaffected status. Moisture sensitivity level is 1 (unlimited) for both parts.

Q: What determines whether a TVS diode can substitute for the P4SMA68A-Q?

A: Substitution requires matching reverse standoff voltage (58V to 58.1V), breakdown voltage minimum (64.4V or higher), clamping voltage maximum (92V to 93.6V), peak pulse current (4.3A or higher), identical surface mount SMA package format, unidirectional zener configuration, and automotive AEC-Q101 qualification.

Q: Can parts with different clamping voltages be used interchangeably?

A: No. Clamping voltage directly determines the maximum transient voltage suppressed at the protected circuit node. The P4SMA68A-Q clamps at 92V maximum, while SMAJE58AH clamps at 93.6V maximum. This 1.6V difference remains within acceptable tolerance for telecom protection circuits but must be verified against specific circuit voltage limits.

Q: What is the significance of the DO-214AC / SMA package designation?

A: DO-214AC and SMA refer to the same surface mount package format. Both designations describe a two-lead surface mount diode package with identical footprint, solder pad geometry, and PCB placement requirements. Parts specified in either designation are mechanically interchangeable.