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Vishay General Semiconductor - Diodes Division SMBJ54CA-E3/5B
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- Part No.:
- SMBJ54CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CA-E3/5B.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,220
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Product details
Overview
SMBJ54CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 54 V stand-off voltage (VWM), 60.0–66.3 V breakdown voltage (VBR) at 1 mA, 87.1 V maximum clamping voltage (VC) at 6.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ54CA-E3/5B datasheet, SMBJ54CA-E3/5B pinout, SMBJ54CA-E3/5B application, or SMBJ54CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.35), MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin plating - critical for automated SMT assembly and surge immunity in 24–48 V DC systems.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in either direction. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling protection against ESD, lightning-induced surges, and inductive switching spikes.
The device is rated for TJ = –55 °C to +150 °C, exhibits 0.104 %/°C temperature coefficient of VBR, and delivers 6.9 A peak pulse current under standardized 10/1000 µs waveform - validated with derating above 25 °C per Fig. 2 and mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 48 V nominal systems. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - verified breakdown threshold range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 87.1 V at 6.9 A - clamped voltage seen by protected circuit during full-rated 600 W transient; limits stress on downstream components. |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; supports repetitive surge duty cycle ≤ 0.01 %. |
| IPPM | 6.9 A - peak pulse current corresponding to VC; derived from PPPM/VC and validated per Fig. 1. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in high-ambient industrial environments without thermal shutdown. |
| RθJA | 100 °C/W - typical junction-to-ambient thermal resistance; informs PCB copper pad design for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; voltage clamping occurs regardless of polarity - simplifies layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surge (4 kV line-earth) when properly mounted on recommended 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic interfacing with 48 V bus domains. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking; reduces manufacturing complexity and cost. |
| AEC-Q101 qualified variant available | HE3/HM3 suffix versions meet automotive-grade reliability requirements - same footprint enables drop-in qualification upgrade. |
Applications
| Industrial PLC I/O Protection | Telecom Power Interface |
|---|---|
|
Use Scenario: Protecting 24–48 V DC input/output channels in programmable logic controllers from inductive kickback and field wiring surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point before signal conditioning circuitry. Use Value: Limits transient voltage to ≤87.1 V during 600 W surges, preventing latch-up or gate oxide damage in isolated RS-485 transceivers and optocoupler drivers. |
Use Scenario: Surge suppression on -48 V DC telecom power feeds entering base station equipment cabinets. IC Role / Device Role / Timing Role: Primary-level TVS on power rail prior to DC/DC converter input stage. Use Value: Absorbs up to 6.9 A peak current from lightning-induced surges while maintaining <1.0 µA leakage at steady-state -48 V operation. |
| Automotive Body Control Module | Consumer Sensor Hub Protection |
|
Use Scenario: Safeguarding LIN bus and switched 12 V loads in body control modules against load dump and jump-start transients. IC Role / Device Role / Timing Role: Secondary protection device downstream of primary fuse and upstream of local regulator/LIN transceiver. Use Value: Clamps transients within 1 ns to prevent false triggering or reset of microcontrollers - validated per ISO 7637-2 Pulse 5a. |
Use Scenario: ESD and cable discharge protection for I²C/SPI sensor arrays in smart home hubs exposed to user-handled cables. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor interface lines adjacent to connectors. Use Value: Provides 30 kV HBM ESD immunity (per AEC-Q101 test plan) with <10 pF junction capacitance - avoids signal integrity degradation on 400 kHz I²C buses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CA-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No difference in circuit performance; selected where halogen-free compliance is mandated by end-product environmental policy. | Direct material substitution when halogen-free certification is required; same thermal and mechanical behavior. |
| SMAJ54CA-E3/5B | Lower 400 W PPPM, higher VC (93.6 V), smaller SMA (DO-214AC) package with lower thermal mass. | Reduced surge margin and less robust thermal performance - suitable only for lower-energy transients or space-constrained layouts. | Consider only if board area is critical and surge threat level is below IEC 61000-4-5 Level 3; not recommended for industrial 48 V rails. |
Compared with SMBJ54CA-E3/5B, the M3/5B offers identical protection performance with halogen-free assurance, while the SMAJ54CA-E3/5B trades 33 % lower pulse power and higher clamping for 30 % smaller footprint - making the SMBJ54CA-E3/5B optimal for robust, standards-compliant 48 V system protection.
Availability
SMBJ54CA-E3/5B is available at Aetrix Electronics and suitable for industrial PLC I/O protection, telecom power interface hardening, and automotive body control module designs requiring stable component supply and long-term obsolescence management.
Supply support for SMBJ54CA-E3/5B 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive electronics where consistent clamping performance and AEC-Q101 readiness are essential.
FAQ
What is the clamping voltage of SMBJ54CA-E3/5B at its rated peak pulse current?
The SMBJ54CA-E3/5B has a maximum clamping voltage (VC) of 87.1 V at its rated peak pulse current of 6.9 A, measured under the standardized 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 and defines the upper voltage limit imposed on protected circuits during worst-case surge events. The SMBJ54CA-E3/5B maintains this clamping performance bidirectionally due to its symmetrical construction.
Is SMBJ54CA-E3/5B suitable for automotive applications?
The SMBJ54CA-E3/5B itself is commercial-grade (RoHS-compliant, E3 suffix), but Vishay offers AEC-Q101-qualified variants under HE3 and HM3 suffixes (e.g., SMBJ54CAHE3_B/I). For automotive use, the SMBJ54CA-E3/5B must be replaced with an AEC-Q101 version - the SMBJ54CA-E3/5B does not carry automotive qualification, though its thermal and electrical specs align with many body electronics requirements.
How does the bidirectional nature of SMBJ54CA-E3/5B affect PCB layout?
The SMBJ54CA-E3/5B has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This allows simplified routing on differential or AC-coupled lines and removes risk of misassembly - unlike unidirectional TVS diodes that require strict cathode alignment. The SMBJ54CA-E3/5B's symmetrical behavior is confirmed in the "DEVICES FOR BIDIRECTION APPLICATIONS" section of the Vishay datasheet.
What is the maximum reverse leakage current for SMBJ54CA-E3/5B at its stand-off voltage?
The SMBJ54CA-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 54 V stand-off voltage (VWM), measured at 25 °C. This low leakage ensures minimal power loss and signal interference in always-on monitoring circuits. The value is specified in the "ELECTRICAL CHARACTERISTICS" table of the Vishay document 88392 and applies to both polarities due to the device's bidirectional design.
Can SMBJ54CA-E3/5B be used in place of a unidirectional TVS like SMBJ54A-E3/5B?
No - the SMBJ54CA-E3/5B is strictly bidirectional and cannot replace unidirectional types such as SMBJ54A-E3/5B in DC-biased applications requiring forward conduction blocking. While both share VWM = 54 V and similar VBR, the unidirectional SMBJ54A-E3/5B conducts only in reverse bias and blocks forward current, whereas the SMBJ54CA-E3/5B clamps in both directions. Substitution requires circuit review for polarity dependence.
SMBJ54CA-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- 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 (SMBJ)
SMBJ54CA-E3/5B FAQ
1.How can I place an order for SMBJ54CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CA-E3/5B 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 SMBJ54CA-E3/5B reliable?
The price and inventory of SMBJ54CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ54CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CA-E3/5B?
SMBJ54CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CA-E3/5B 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 SMBJ54CA-E3/5B?
For technical support, including SMBJ54CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ54CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ54CA-E3/5B 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 SMBJ54CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ54CA-E3/5B?
All SMBJ54CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CA-E3/5B, 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 SMBJ54CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ54CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54CA-E3/5B Tags
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