USB50824C-A/TR7 Equivalent & Substitute Parts

Part Overview

The USB50824C-A/TR7 is a bidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for Ethernet and general-purpose transient protection applications. This 24V working voltage device features a 57V maximum clamping voltage and 5A peak pulse current rating in an 8-SOIC surface mount package. The component is currently in active production status with 902 pieces available in original inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, packaging preferences, or design revision requirements.

Substiute Parts

USB50824C-A/TR7

Microchip TechnologyIn Stock: 988USB50824C-A/TR7 Datasheet

Current PartRFQ

SMDA24C.TBT

Semtech CorporationIn Stock: 10458SMDA24C.TBT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the USB50824C-A/TR7 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage - Reverse Standoff (Typ): 24V nominal
• Voltage - Breakdown (Min): 26.7V minimum
• Voltage - Clamping (Max) @ Ipp: Must not exceed 57V
• Current - Peak Pulse (8/20µs): 5A minimum
• Bidirectional operation capability

Mechanical Compatibility Requirements:

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Supplier Device Package: 8-SO

Environmental Requirements:

• Operating Temperature Range: -55°C to 150°C minimum

The SMDA24C.TBT from Semtech Corporation meets the core electrical and mechanical substitution criteria, with the exception of operating temperature range (maximum 125°C versus 150°C) and power dissipation rating (300W versus 500W). These differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: USB50824C-A/TR7

Selection is appropriate when:

• Operating temperature environment reaches or exceeds 125°C
• Peak pulse power dissipation requirements approach or exceed 300W
• RoHS non-compliance is acceptable for the application
• Lower capacitance (3pF) is required to minimize signal coupling effects

Substitute Part: SMDA24C.TBT

Selection is appropriate when:

• Operating temperature remains below 125°C
• Peak pulse power dissipation does not exceed 300W
• ROHS3 compliance is required
• Higher channel count (4 bidirectional channels) provides design flexibility
• Cut Tape or Digi-Reel® packaging is preferred over Tape & Reel

Both parts share identical voltage ratings (24V standoff, 26.7V breakdown minimum, 55-57V clamping) and current handling (5A peak pulse), ensuring functional equivalence within their respective thermal and power constraints.

Frequently Asked Questions (FAQ)

Q: Can SMDA24C.TBT replace USB50824C-A/TR7 in all applications?

A: Substitution is valid only when operating temperature does not exceed 125°C and peak pulse power dissipation remains below 300W. The USB50824C-A/TR7 supports operation to 150°C and 500W peak pulse, providing extended thermal and power margins. Verify application requirements before substitution.

Q: What is the significance of the 2 versus 4 bidirectional channels?

A: The USB50824C-A/TR7 provides 2 bidirectional protection channels in a single 8-SO package, while SMDA24C.TBT provides 4 channels. The SMDA24C.TBT offers greater integration density but requires verification that the additional channels do not introduce unintended coupling in the circuit design.

Q: How do the clamping voltages (57V vs 55V) affect substitution?

A: Both clamping voltages fall within acceptable transient suppression ranges for 24V nominal systems. The 2V difference (57V versus 55V) represents a 3.5% variation and does not affect functional compatibility for Ethernet and general-purpose protection applications.

Q: What packaging differences exist between these parts?

A: USB50824C-A/TR7 is supplied in Tape & Reel (TR) format. SMDA24C.TBT is available in Cut Tape (CT) and Digi-Reel® formats. Both use identical 8-SOIC (0.154", 3.90mm Width) mechanical packages suitable for surface mount assembly.

Q: Does the capacitance difference (3pF vs 50pF) impact signal integrity?

A: The SMDA24C.TBT exhibits 47pF higher capacitance at 1MHz. In high-speed Ethernet applications, this increased capacitance may introduce additional signal loading. Evaluate impedance and signal timing requirements before substitution in bandwidth-critical circuits.

Q: What is the impact of RoHS compliance differences?

A: USB50824C-A/TR7 is RoHS non-compliant, while SMDA24C.TBT is ROHS3 compliant. If the end application or supply chain requires RoHS3 certification, SMDA24C.TBT is the required selection regardless of other parameter considerations.