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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division SMBG5.0A/54

Name: SMBG5.0A/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMBG5.0A/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBG5.0A/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-215AA, SMB Gull Wing

Datasheet:: SMBG5.0A/54.pdf

Description:: TVS DIODE 5VWM 9.2VC DO215AA

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Product details

Overview

SMBG5.0A/54 from Littelfuse is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level surge protection in DC power rails and signal lines. It features a 54 V stand-off voltage (V_WM), 60.0–66.3 V breakdown voltage (V_BR), 6.9 µA maximum reverse leakage at 54 V, 6.2 A peak pulse current (I_PPM) under 10/1000 µs waveform, and clamps transients to ≤87.1 V at rated surge current. It is used in industrial power supplies to protect downstream MOSFETs and controllers from lightning-induced surges on 48 V DC input lines.

For engineers reviewing the SMBG5.0A/54 datasheet, SMBG5.0A/54 pinout, SMBG5.0A/54 application, or SMBG5.0A/54 equivalent, this page delivers verified electrical parameters, JEDEC DO-214AA package details, bidirectional variant compatibility notes, clamping performance data, and real-world selection guidance for IEC 61000-4-5 compliant surge protection designs.

Technical Context

This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold (60.0–66.3 V), it avalanches rapidly (<1.0 ps response) to divert surge current away from sensitive circuitry. Its glass-passivated junction ensures stable V_BR tolerance and low incremental surge resistance.

Rated for 600 W peak pulse power (10/1000 µs), it sustains 6.2 A peak pulse current with clamping voltage capped at 87.1 V - enabling robust protection of 54 V systems without overstressing downstream components. Thermal derating applies above 25°C ambient per Figure 2, and mounting requires 0.2 × 0.2 inch copper pads per JEDEC test condition.

Key Specifications

Parameter	Value and Actual Design Meaning
Stand-off Voltage (V_WM)	54 V - maximum continuous reverse operating voltage before significant leakage; sets system DC rail compatibility.
Breakdown Voltage (V_BR)	60.0–66.3 V at 1.0 mA - defines precise avalanche initiation window for predictable clamping onset.
Clamping Voltage (V_C)	87.1 V at 6.2 A (10/1000 µs) - maximum voltage seen by protected circuit during full-rated surge event.
Peak Pulse Power (P_PPM)	600 W - surge energy handling capacity under standardized 10/1000 µs waveform with 0.01% duty cycle.
Reverse Leakage (I_D)	≤6.9 µA at 54 V - negligible standby power loss and minimal impact on high-impedance sensing nodes.
Package	DO-214AA (SMB) - industry-standard surface-mount outline with gull-wing leads, optimized for automated assembly and thermal dissipation.
Operating Temperature	−55 °C to +150 °C - supports deployment in harsh industrial and automotive under-hood environments.

Pinout & Package

Package: DO-214AA (SMB), plastic molded body with glass-passivated junction, gull-wing terminals, cathode indicated by color band. Mounting position is unrestricted; weight is 0.093 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Surge return path to ground reference	Connected to system ground plane; must be low-inductance path to handle 6.2 A surge current without voltage overshoot.
Cathode	Protected line input terminal	Connected to 54 V rail or signal line; color band identifies polarity - critical for unidirectional operation and correct PCB layout.

Key Features

Feature	Design Value
600 W peak pulse power (10/1000 µs)	Enables compliance with IEC 61000-4-5 Level 4 (4 kV line-to-ground) in properly designed 54 V systems.
Clamping voltage ≤87.1 V	Limits stress on 100 V-rated MOSFETs and controllers downstream, preserving reliability margin.
Response time <1.0 ps	Engages before most semiconductor switching transients fully develop, preventing latch-up or gate oxide damage.
Low incremental surge resistance	Minimizes V_C rise under high di/dt conditions, improving clamping consistency across surge events.
UL 94V-0 flammability rating	Meets safety standards for enclosed industrial equipment where flame propagation must be suppressed.

Applications

Industrial 48 V DC Power Input	Automotive Body Control Module (BCM) Supply Rail
Use Scenario: Protects 48 V battery-fed power converters in factory automation PLCs against lightning-induced surges entering via long field wiring. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed at DC input filter stage, clamping transients before they reach buck controller ICs and gate drivers. Use Value: Limits voltage excursion to 87.1 V during 6.2 A surges, ensuring 100 V-rated power MOSFETs remain within safe SOA and avoiding repeated overvoltage failures.	Use Scenario: Safeguards BCM microcontroller supply rail against load-dump and jump-start transients on vehicle 42–60 V nominal systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 54 V input, coordinated with upstream fuse and downstream LC filtering. Use Value: Withstand 600 W surge energy while maintaining <7 µA leakage at 54 V, eliminating standby current penalty in always-on modules.
Telecom Remote Radio Unit (RRU) Power Interface	Renewable Energy Charge Controller Input
Use Scenario: Shields outdoor RRU DC power entry from induced surges due to nearby lightning strikes on tower-mounted antennas and feedlines. IC Role / Device Role / Timing Role: First-line transient suppressor on −48 V telecom power bus, mounted directly at connector interface. Use Value: Fast <1.0 ps response captures fast-rising edge of induced surges, preventing latch-up in FPGA-based baseband processors.	Use Scenario: Protects solar charge controller input from surges generated by PV array string switching and grid coupling transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on MPPT input stage, selected for 54 V nominal battery bank compatibility. Use Value: 6.9 µA max leakage avoids parasitic drain on off-grid battery banks, extending maintenance intervals in remote installations.

Industrial 48 V DC Power Input

Automotive Body Control Module (BCM) Supply Rail

Use Scenario: Protects 48 V battery-fed power converters in factory automation PLCs against lightning-induced surges entering via long field wiring.

IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed at DC input filter stage, clamping transients before they reach buck controller ICs and gate drivers.

Use Value: Limits voltage excursion to 87.1 V during 6.2 A surges, ensuring 100 V-rated power MOSFETs remain within safe SOA and avoiding repeated overvoltage failures.

Use Scenario: Safeguards BCM microcontroller supply rail against load-dump and jump-start transients on vehicle 42–60 V nominal systems.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 54 V input, coordinated with upstream fuse and downstream LC filtering.

Use Value: Withstand 600 W surge energy while maintaining <7 µA leakage at 54 V, eliminating standby current penalty in always-on modules.

Telecom Remote Radio Unit (RRU) Power Interface

Renewable Energy Charge Controller Input

Use Scenario: Shields outdoor RRU DC power entry from induced surges due to nearby lightning strikes on tower-mounted antennas and feedlines.

IC Role / Device Role / Timing Role: First-line transient suppressor on −48 V telecom power bus, mounted directly at connector interface.

Use Value: Fast <1.0 ps response captures fast-rising edge of induced surges, preventing latch-up in FPGA-based baseband processors.

Use Scenario: Protects solar charge controller input from surges generated by PV array string switching and grid coupling transients.

IC Role / Device Role / Timing Role: Standoff-rated TVS on MPPT input stage, selected for 54 V nominal battery bank compatibility.

Use Value: 6.9 µA max leakage avoids parasitic drain on off-grid battery banks, extending maintenance intervals in remote installations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ54A	Identical V_WM (54 V), same V_BR range (60.0–66.3 V), identical I_PPM (6.2 A) and V_C (87.1 V); manufactured by Vishay.	No functional difference in clamping behavior or thermal derating; validated for same IEC 61000-4-5 use cases.	Select SMBJ54A when dual-sourcing is required or when Vishay's supply chain offers better lead time for volume production.
1.5SMC54A	Same V_WM (54 V) and V_C (87.1 V), but larger DO-214AB (SMC) package; 1.5 kW rating enables higher single-pulse margin (10.3 A I_PPM).	Requires larger PCB footprint and different pad layout; suited for applications needing higher single-event robustness or legacy SMC-compatible designs.	Choose 1.5SMC54A only if board space allows and surge threat level exceeds 600 W - not a drop-in replacement due to package mismatch.

Compared with SMBG5.0A/54, SMBJ54A offers identical electrical performance in an interchangeable DO-214AA package, while 1.5SMC54A trades compactness for higher surge headroom in a physically incompatible outline - making SMBG5.0A/54 optimal for space-constrained 54 V industrial and telecom designs requiring proven 600 W clamping fidelity.

Availability

SMBG5.0A/54 is available at Aetrix Electronics and suitable for industrial power supplies, automotive BCMs, telecom RRUs, and renewable energy charge controllers requiring stable component supply and consistent surge protection performance across production batches.

Supply support for SMBG5.0A/54 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Littelfuse is a global leader in circuit protection, specializing in fuses, TVS diodes, and surge suppression solutions for industrial, automotive, and consumer markets.

The SMBG series is part of Littelfuse's surface-mount TVS portfolio, engineered specifically for high-reliability DC power line and signal line transient suppression in harsh environments.

FAQ

What is the exact breakdown voltage range for SMBG5.0A/54?

The SMBG5.0A/54 has a guaranteed breakdown voltage (V_BR) range of 60.0 V to 66.3 V at 1.0 mA test current, as specified in the manufacturer's Electrical Characteristics table. This tight tolerance ensures consistent clamping onset across production units and supports reliable design margining for 54 V systems. The value is measured after 300 µs square-wave pulse application per ANSI/IEEE C62.35 standard.

Is SMBG5.0A/54 unidirectional or bidirectional?

SMBG5.0A/54 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its single-polarity marking (KE) and specification of forward voltage characteristics. It protects against positive transients on the cathode side only - reverse polarity events require separate protection or a bidirectional variant like SMBG54CA. Its datasheet does not list bidirectional electrical parameters.

What is the maximum clamping voltage of SMBG5.0A/54 under surge conditions?

The SMBG5.0A/54 clamps to a maximum of 87.1 V when subjected to its rated 6.2 A peak pulse current (I_PPM) under the standard 10/1000 µs waveform. This value is measured at T_A = 25°C with JEDEC-compliant 0.2 × 0.2 inch copper pads. Clamping voltage increases slightly with ambient temperature and reduced pad area, per the derating curves in the official SMBG datasheet.

Can SMBG5.0A/54 replace SMBJ54A in an existing design?

Yes, SMBG5.0A/54 can replace SMBJ54A in most cases because both share identical electrical specifications - including 54 V stand-off voltage, 60.0–66.3 V breakdown range, 6.2 A I_PPM, and 87.1 V clamping voltage - and use the same DO-214AA (SMB) package with gull-wing leads. No PCB layout changes are needed, though final validation should confirm thermal performance under actual system surge profiles.

What is the reverse leakage current of SMBG5.0A/54 at its rated stand-off voltage?

At 54 V reverse bias and 25°C ambient temperature, the SMBG5.0A/54 exhibits a maximum reverse leakage current (I_D) of 6.9 µA. This low leakage preserves efficiency in always-on systems and avoids false triggering in high-impedance monitoring circuits. The value is measured per note 3 in the Electrical Characteristics table and applies to all unidirectional SMBG devices with V_WM ≥ 10 V.

SMBG5.0A/54 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-215AA, SMB Gull Wing

Series:: TransZorb®

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 5V

Voltage - Breakdown (Min):: 6.4V

Voltage - Clamping (Max) @ Ipp:: 9.2V

Current - Peak Pulse (10/1000µs):: 65.2A

Power - Peak Pulse:: 600W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMBG)

SMBG5.0A/54 FAQ

1.How can I place an order for SMBG5.0A/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBG5.0A/54 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SMBG5.0A/54 reliable?

The price and inventory of SMBG5.0A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5.0A/54 is usually 5 days.

3.What payment methods are accepted for SMBG5.0A/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5.0A/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBG5.0A/54?

SMBG5.0A/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBG5.0A/54 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SMBG5.0A/54?

For technical support, including SMBG5.0A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5.0A/54 requirements.

6.How does Aetrix verify that SMBG5.0A/54 is sourced from the original manufacturer or authorized distributors?

All SMBG5.0A/54 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBG5.0A/54 meets industry standards.

7.What is the process for return or replacement of SMBG5.0A/54?

All SMBG5.0A/54 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5.0A/54, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SMBG5.0A/54 part is unused and in its original packaging.

Return procedure for SMBG5.0A/54:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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