SMBJ48A-Q Equivalent & Substitute Parts

Part Overview

The SMBJ48A-Q is an automotive-grade unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc. in SMB (DO-214AA) surface mount package. This component is designed for telecom applications requiring transient voltage protection with a 48V reverse standoff rating and 77.4V maximum clamping voltage. The part is currently active in production with AEC-Q101 automotive qualification and ROHS3 compliance. Equivalent and substitute parts are identified to support supply chain continuity, design flexibility, and inventory management across manufacturing environments.

Substiute Parts

SMBJ48A-Q

Bourns Inc.In Stock: 1057SMBJ48A-Q Datasheet

Current PartRFQ

SMBJE48AH

Eaton - Electronics DivisionIn Stock: 3746SMBJE48AH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ48A-Q is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 48V
• Voltage - Breakdown (Min): 53.3V
• Voltage - Clamping (Max) @ Ipp: 77.4V
• Current - Peak Pulse (10/1000µs): 7.8A
• Power - Peak Pulse: 600W
• Operating Temperature Range: -55°C to 150°C
• Package / Case: DO-214AA, SMB
• Unidirectional Channels: 1
• Type: Zener
• Mounting Type: Surface Mount
• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant

The SMBJE48AH from Eaton - Electronics Division meets all electrical and mechanical substitution criteria and is classified as a direct equivalent for the SMBJ48A-Q in telecom protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBJ48A-Q and SMBJE48AH are active production components with identical electrical performance specifications and automotive-grade certifications. Selection between these parts may be based on:

• Supply chain availability and lead time requirements
• Inventory positioning and procurement strategy
• Manufacturer qualification status within specific design environments
• Cost and volume pricing structures

Both parts satisfy AEC-Q101 automotive qualification requirements and maintain ROHS3 compliance. No electrical or mechanical redesign is required when substituting between these components in telecom protection applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJE48AH be used as a direct replacement for SMBJ48A-Q?

A: Yes. The SMBJE48AH meets all electrical and mechanical specifications required for direct substitution. Both components share identical voltage ratings (48V standoff, 77.4V clamping), current handling (7.8A peak pulse), power dissipation (600W), operating temperature range (-55°C to 150°C), package type (DO-214AA, SMB), and automotive qualifications (AEC-Q101, ROHS3).

Q: Are there any package or pinout differences between these parts?

A: No. Both the SMBJ48A-Q and SMBJE48AH use the DO-214AA (SMB) surface mount package with identical pinout and mechanical dimensions. No PCB layout modifications are required for substitution.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both components are AEC-Q101 qualified and automotive-grade, suitable for telecom applications requiring transient voltage suppression in automotive environments.

Q: What is the difference in REACH compliance status between these parts?

A: The SMBJ48A-Q is REACH Affected, while the SMBJE48AH is REACH Unaffected. This distinction relates to regulatory classification but does not affect electrical performance or substitution eligibility. Compliance requirements should be verified against specific regional regulations and customer specifications.

Q: Can these parts be used interchangeably in production?

A: Yes, provided both components are qualified within the design environment and procurement specifications. Electrical equivalence is confirmed across all critical parameters. Manufacturer qualification status and supply chain documentation should be maintained for traceability.