SP0502BXTG Equivalent & Substitute Parts

Part Overview

The SP0502BXTG is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for transient overvoltage protection in high-speed signal applications such as HDMI interfaces. This component features a 5V reverse standoff voltage with a 12V maximum clamping voltage and 1A peak pulse current rating in a compact SOT-523 surface mount package.

The SP0502BXTG is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure continued availability for new production runs and field replacements.

Substiute Parts

SP0502BXTG

Littelfuse Inc.In Stock: 6287SP0502BXTG Datasheet

Current PartRFQ

AQ3102-02JTG

Littelfuse Inc.In Stock: 2925AQ3102-02JTG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SP0502BXTG is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage within or above 5V
• Clamping voltage not exceeding 12V at rated peak pulse current
• Peak pulse current capability of 1A or greater at 8/20µs pulse duration
• Zener diode type for transient suppression
• Unidirectional (2-channel) configuration

Mechanical Compatibility Criteria:

• Surface mount package format
• Compatible footprint or direct package equivalence
• RoHS3 compliance

The AQ3102-02JTG meets these substitution criteria while offering enhanced performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The AQ3102-02JTG is the manufacturer-recommended substitute for the obsolete SP0502BXTG. Both components are manufactured by Littelfuse Inc. and maintain ROHS3 compliance.

The AQ3102-02JTG offers the following advantages:

• Active product status ensures long-term availability and supply chain continuity
• Enhanced peak pulse current rating (8A versus 1A) provides additional transient suppression margin
• Extended operating temperature range (-40°C to 150°C versus -40°C to 125°C)
• AEC-Q101 automotive qualification
• Improved moisture sensitivity level (MSL 1 versus MSL 3)

Package transition from SOT-523 to SC-70 (SOT-323) requires PCB layout modification. Both packages are industry-standard surface mount formats with established manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can the AQ3102-02JTG directly replace the SP0502BXTG without circuit modifications?

A: Electrical substitution is valid based on reverse standoff voltage, clamping voltage, and peak pulse current parameters. However, package geometry differs (SOT-523 to SC-70). PCB footprint redesign is required.

Q: What is the significance of the higher clamping voltage (16V) in the AQ3102-02JTG?

A: The 16V clamping voltage of the substitute remains within acceptable limits for 5V logic protection circuits. The higher clamping voltage does not compromise protection effectiveness and provides additional design margin.

Q: Why does the AQ3102-02JTG have an 8A peak pulse rating versus 1A in the original part?

A: The enhanced current rating reflects improved device design and manufacturing capability. This higher rating provides superior transient suppression performance and design flexibility without requiring circuit changes.

Q: Is the package change from SOT-523 to SC-70 a concern for HDMI applications?

A: Both packages are suitable for high-speed signal protection. Package selection depends on PCB layout constraints and available board space. SC-70 is a widely adopted industry standard for TVS diodes.

Q: What does AEC-Q101 qualification mean for the substitute part?

A: AEC-Q101 is an automotive electronics qualification standard. This certification indicates the AQ3102-02JTG meets stringent reliability and quality requirements applicable to automotive and industrial applications.

Q: Are there any compliance differences between the two parts?

A: Both parts are ROHS3 compliant. The substitute offers improved moisture sensitivity (MSL 1 versus MSL 3), reducing handling and storage requirements during manufacturing.