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Vishay General Semiconductor - Diodes Division SMBJ54CAHM3_B/H
- Part No.:
- SMBJ54CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CAHM3_B/H.pdf
- Description:
- 600W,54V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,617
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Product details
Overview
SMBJ54CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 54 V stand-off voltage (VWM), 60.0–66.3 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 87.1 V at 6.9 A, and operates across –55 °C to +150 °C junction temperature range - deployed on signal lines of industrial sensor units and telecom interface circuits.
For engineers reviewing the SMBJ54CAHM3_B/H datasheet, SMBJ54CAHM3_B/H pinout, SMBJ54CAHM3_B/H application, or SMBJ54CAHM3_B/H equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ps) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes. Its symmetrical I-V characteristics ensure identical clamping performance in both polarities, with no polarity marking required on the SMB package.
The device is rated for 600 W peak pulse power under standard 10/1000 µs waveform, derated linearly above 25 °C ambient per Fig. 2, and supports repetitive surge duty cycle of 0.01 %. Thermal design must account for RθJL = 20 °C/W (junction-to-lead) and recommended 5.0 mm × 5.0 mm copper pad layout per datasheet Fig. 4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Confirmed bidirectional breakdown window; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 87.1 V at 6.9 A - Clamped voltage during 600 W transient; determines maximum stress imposed on protected downstream ICs. |
| PPPM | 600 W (10/1000 µs) - Peak surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 compliance designs. |
| ID @ VWM | 1.0 µA max - Ultra-low reverse leakage at stand-off voltage; preserves signal integrity and minimizes standby power loss. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in high-ambient industrial and automotive under-hood environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.21 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no cathode/anode marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity assignment. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line and ground or rail. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against severe transients per IEC 61000-4-5, including indirect lightning surges in telecom and industrial interfaces. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for global OEM production, including JESD201 Class 2 whisker resistance. |
| AEC-Q101 qualified | Validated for automotive-grade reliability - suitable for infotainment, ADAS sensor interfaces, and body control modules. |
| Low profile SMB package | 0.205" × 0.160" (5.21 mm × 4.06 mm) footprint enables compact PCB layouts without sacrificing surge robustness. |
| Fast response time & low clamping ratio | Sub-nanosecond turn-on and VC/VBR ≈ 1.45 ensure minimal overvoltage exposure to protected MOSFETs or microcontrollers. |
Applications
| Industrial Sensor Interface Protection | Telecom Line Surge Suppression |
|---|---|
|
Use Scenario: Protecting RS-485/RS-422 transceivers and analog sensor outputs (e.g., 4–20 mA loops) from ESD and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between differential signal pair and ground plane. Use Value: Limits transient voltage to ≤87.1 V, preventing latch-up or gate oxide damage in protected transceivers while maintaining signal fidelity at DC–10 MHz. |
Use Scenario: Shielding Ethernet PHYs, DSL line drivers, and POTS interface ICs from lightning-induced surges on outdoor-facing copper lines. IC Role / Device Role / Timing Role: Primary front-end TVS on tip/ring lines, coordinated with GDT or MOV secondary protection stages. Use Value: Absorbs up to 600 W of surge energy without degradation, preserving signal integrity and meeting GR-1089-CORE Level 3 immunity requirements. |
| Automotive Body Electronics | Consumer Device Port Protection |
|
Use Scenario: Safeguarding LIN bus nodes, door module MCUs, and ambient light sensor inputs against load dump and jump-start transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector entry point, referenced to chassis ground. Use Value: AEC-Q101 qualification ensures 1,000+ thermal cycles and 1,500 hrs HTOL stability, supporting 15-year automotive service life. |
Use Scenario: Securing USB 2.0 data lines, HDMI hot-plug detection pins, and audio jack contacts against human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) clamping diode placed inline with high-speed signal traces. Use Value: Sub-1 ns response prevents ESD-induced system resets or data corruption while adding <0.3 pF parasitic capacitance to signal path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CAHE3_B/H | Same electrical specs and SMB package; RoHS-compliant but not halogen-free (E3 vs HM3). | Lacks halogen-free certification; acceptable for commercial, non-automotive applications where JESD201 Class 2 whisker resistance is not mandated. | Select when halogen-free requirement is waived and cost optimization is prioritized over automotive-grade compliance. |
| SMAJ54CA | Lower 400 W PPPM, larger SMA (DO-214AC) package, higher RθJA (140 °C/W), same VWM/VBR. | Reduced surge margin and less efficient thermal dissipation; suitable only for lower-energy transients or space-constrained legacy layouts. | Choose only if existing PCB footprint mandates SMA and transient threat level is limited to IEC 61000-4-2 Level 4 (±15 kV contact). |
Compared with SMBJ54CAHE3_B/H, the SMBJ54CAHM3_B/H adds halogen-free construction and AEC-Q101 qualification without compromising clamping performance; versus SMAJ54CA, it delivers 50 % higher surge power handling and superior thermal management in the same functional role.
Availability
SMBJ54CAHM3_B/H is available at Aetrix Electronics and suitable for industrial sensor interface protection, telecom line surge suppression, and automotive body electronics requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for SMBJ54CAHM3_B/H 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in space-constrained, high-reliability applications - engineered for automotive, industrial, and telecom infrastructure where consistent clamping and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ54CAHM3_B/H at its rated peak pulse current?
The SMBJ54CAHM3_B/H has a maximum clamping voltage (VC) of 87.1 V at its peak pulse current (IPPM) of 6.9 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMBJ54CAHM3_B/H maintains this clamping performance bidirectionally, ensuring symmetric protection across both polarities without polarity-dependent variation.
Is SMBJ54CAHM3_B/H qualified for automotive applications?
Yes, SMBJ54CAHM3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix with "_B/H" reel packaging) and documentation in the SMBJ5.0A–SMBJ188A datasheet (Document Number 88392, Revision 09-Jan-2024). This qualification covers stress tests including HTOL, temperature cycling, and mechanical shock, validating its use in automotive body electronics, infotainment interfaces, and sensor modules where reliability under extended thermal and vibration profiles is mandatory. The SMBJ54CAHM3_B/H meets these requirements without derating.
What does the "HM3" suffix indicate in SMBJ54CAHM3_B/H?
The "HM3" suffix in SMBJ54CAHM3_B/H denotes halogen-free, RoHS-compliant construction that also satisfies JESD201 Class 2 whisker resistance requirements. Unlike the "E3" variant, HM3 uses bromine- and chlorine-free molding compounds and matte tin-plated leads, making it compliant with stringent environmental regulations for automotive and industrial OEMs. This designation is explicitly defined in the Vishay datasheet's Mechanical Data section and applies to the entire SMBJ54CAHM3_B/H unit - not just the base P/N. The SMBJ54CAHM3_B/H is fully traceable to this material specification.
How does SMBJ54CAHM3_B/H differ from unidirectional SMBJ54A variants?
SMBJ54CAHM3_B/H is bidirectional, meaning it provides symmetrical clamping for both positive and negative transients without polarity dependence, whereas unidirectional SMBJ54A types have a marked cathode band and conduct only in reverse bias. The SMBJ54CAHM3_B/H exhibits identical VBR, VC, and PPPM in both directions and carries no polarity marking on the SMB package. This makes SMBJ54CAHM3_B/H ideal for AC-coupled lines, differential buses, or any application where voltage polarity reversal is possible - unlike SMBJ54A, which would fail catastrophically under forward-polarity surges.
What is the thermal resistance of SMBJ54CAHM3_B/H, and how does it affect PCB layout?
The SMBJ54CAHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This value assumes minimum recommended pad layout - reducing pad area increases RθJA and risks thermal runaway during repetitive surges. For reliable operation at full 600 W rating, designers must implement adequate copper pour, avoid thermal isolation, and consider RθJL = 20 °C/W for lead-to-board conduction paths. The SMBJ54CAHM3_B/H's thermal performance is validated only under these conditions.
SMBJ54CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ54CAHM3_B/H FAQ
1.How can I place an order for SMBJ54CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CAHM3_B/H 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 SMBJ54CAHM3_B/H reliable?
The price and inventory of SMBJ54CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ54CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CAHM3_B/H?
SMBJ54CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CAHM3_B/H 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 SMBJ54CAHM3_B/H?
For technical support, including SMBJ54CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ54CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ54CAHM3_B/H 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 SMBJ54CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ54CAHM3_B/H?
All SMBJ54CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CAHM3_B/H, 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 SMBJ54CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ54CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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