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Vishay General Semiconductor - Diodes Division SMBJ54CAHM3_A/H
- Part No.:
- SMBJ54CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CAHM3_A/H.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,052
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Product details
Overview
SMBJ54CAHM3_A/H 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 power and signal lines. It features a 54 V standoff voltage (VWM), 600 W peak pulse power (10/1000 µs), clamping voltage of 87.1 V at 6.9 A peak surge current, and operates across -55 °C to +150 °C junction temperature - deployed in industrial sensor interfaces and telecom power rail protection.
For engineers reviewing the SMBJ54CAHM3_A/H datasheet, SMBJ54CAHM3_A/H pinout, SMBJ54CAHM3_A/H application, or SMBJ54CAHM3_A/H equivalent, this page delivers verified electrical specs, 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 device functions as a bidirectional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable VBR (60.0–66.3 V at 1 mA) and low incremental surge resistance, critical for fast response (<1 ns) to ESD and lightning-induced surges.
Designed for surface-mount PCB integration, SMBJ54CAHM3_A/H uses the SMB (DO-214AA) package with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. It meets MSL Level 1 (260 °C reflow peak) and supports repetitive surge duty cycles up to 0.01 %, with thermal resistance RθJL = 20 °C/W to lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V nominal systems. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Breakdown voltage range confirming bidirectional symmetry and tolerance control for reliable clamping onset. |
| VC @ IPPM | 87.1 V at 6.9 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs or MOSFETs. |
| PPPM | 600 W - Peak pulse power handling capability under standardized 10/1000 µs waveform; validates robustness against IEC 61000-4-5 Level 3/4 surges. |
| IPPM | 6.9 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify layout survivability. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in high-ambient environments such as automotive engine bays or industrial enclosures. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; forms one half of symmetrical clamping path. |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; completes bidirectional conduction path with anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - eliminates need for dual unidirectional devices. |
| 600 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity requirements for industrial and telecom equipment. |
| AEC-Q101 qualified (HM3 suffix) | Confirms reliability for automotive applications including body electronics, infotainment power rails, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for global OEMs and industrial end-equipment without compromising surge performance. |
| MSL Level 1 moisture sensitivity | Supports standard SMT reflow processes without baking - reduces manufacturing overhead and avoids moisture-related popcorning. |
Applications
| Industrial Sensor Interface | Telecom Power Rail Protection |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop sensors and RS-485 transceivers from inductive switching spikes and ESD events in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential signal pairs or supply inputs to limit transient overvoltage before it reaches precision analog front-ends. Use Value: Prevents latch-up or permanent damage to op-amps and ADCs by limiting VC to 87.1 V while maintaining signal integrity through low capacitance (<100 pF at 0 V). |
Use Scenario: Safeguarding 48 V DC power distribution in base station remote radio units (RRUs) and optical line terminals (OLTs) against lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input bulk capacitor terminals, absorbing 600 W surges without degradation across 1000+ events. Use Value: Ensures system uptime by preventing fuse blowing or MOSFET failure during repeated 10/1000 µs transients, validated per Telcordia GR-1089-CORE. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Suppressing load-dump and jump-start transients on LIN bus power lines and window lift motor control circuits in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector entry points to shunt energy before reaching AEC-Q100 qualified microcontrollers and gate drivers. Use Value: Meets ISO 7637-2 Pulse 5a/b requirements with VC ≤ 87.1 V and TJ rating up to +150 °C - eliminating need for external heat sinking. |
Use Scenario: Clamping commutation spikes from universal motor brushes and BLDC inverter shoot-through in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals or DC-link capacitors to absorb inductive kickback energy during PWM switching transitions. Use Value: Extends MOSFET lifetime by limiting drain-source voltage overshoot to ≤87.1 V, reducing dv/dt stress and gate oxide wear under repetitive 6.9 A surge conditions. |
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_A/H | Same electrical specs and SMB package, but RoHS-compliant commercial grade (non-AEC-Q101); no halogen-free certification. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost-sensitive non-automotive applications require identical clamping performance without halogen-free or automotive validation. |
| SMAJ54CAHM3_A/H | Lower peak pulse power (400 W vs. 600 W); same VWM, VBR, and VC, but smaller SMA (DO-214AC) package with higher RθJA (140 °C/W). | Reduced surge margin and thermal performance; limited to lower-energy transients or space-constrained layouts where 600 W is excessive. | Choose only if board area is critical and surge threat level is below IEC 61000-4-5 Level 2 - verify thermal derating at elevated ambient temperatures. |
Compared with SMBJ54CAHE3_A/H, SMBJ54CAHM3_A/H adds halogen-free compliance and AEC-Q101 qualification without sacrificing clamping performance; versus SMAJ54CAHM3_A/H, it delivers 50 % higher surge energy handling and superior thermal management in the same footprint family.
Availability
SMBJ54CAHM3_A/H is available at Aetrix Electronics and suitable for industrial sensor interface, telecom power rail protection, automotive body control module, and consumer appliance motor drive applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified reliability.
Supply support for SMBJ54CAHM3_A/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 high-reliability, high-power, and automotive-grade solutions.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where surge immunity and long-term stability are mission-critical.
FAQ
What is the clamping voltage of SMBJ54CAHM3_A/H at its rated peak pulse current?
The SMBJ54CAHM3_A/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 surge events - a key parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ54CAHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ54CAHM3_A/H suitable for automotive applications?
Yes, SMBJ54CAHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It is specifically intended for use in automotive body electronics, infotainment power supplies, and sensor interfaces where reliability under temperature cycling, vibration, and load-dump conditions is required. The SMBJ54CAHM3_A/H meets all stress test requirements defined in AEC-Q101 Rev D, including HTGB, HTRB, and TCT.
How does the bidirectional design of SMBJ54CAHM3_A/H affect its circuit placement?
The bidirectional design of SMBJ54CAHM3_A/H eliminates polarity marking and allows placement across any two nodes subject to differential or AC-coupled transients - such as RS-485 differential pairs, transformer-coupled Ethernet lines, or floating power rails. Unlike unidirectional TVS diodes, SMBJ54CAHM3_A/H requires no orientation check during assembly and provides symmetrical clamping in both directions, simplifying layout and reducing BOM count. Its DO-214AA package supports automated placement without alignment constraints.
What is the thermal resistance of SMBJ54CAHM3_A/H, and how does it impact PCB layout?
SMBJ54CAHM3_A/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. This value assumes minimum recommended pad layout per Vishay's datasheet Figure 5. To maintain safe junction temperature under repetitive surges, designers must ensure adequate copper area and avoid thermal bottlenecks - especially above 70 °C ambient. The SMBJ54CAHM3_A/H also features RθJL = 20 °C/W to lead, supporting efficient heat transfer to adjacent traces or ground planes.
Does SMBJ54CAHM3_A/H meet industry surge immunity standards?
Yes, SMBJ54CAHM3_A/H is rated for 600 W peak pulse power with a 10/1000 µs waveform, aligning with IEC 61000-4-5 Level 3 (1 kV line-to-line, 2 kV line-to-ground) and Level 4 (2 kV line-to-line, 4 kV line-to-ground) surge test requirements. Its clamping voltage of 87.1 V at 6.9 A ensures protected circuits remain within safe operating limits during standardized surge events. The SMBJ54CAHM3_A/H is also referenced in Telcordia GR-1089-CORE for telecom infrastructure applications.
SMBJ54CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ54CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CAHM3_A/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_A/H reliable?
The price and inventory of SMBJ54CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ54CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CAHM3_A/H?
SMBJ54CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CAHM3_A/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_A/H?
For technical support, including SMBJ54CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ54CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ54CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ54CAHM3_A/H?
All SMBJ54CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMBJ54CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54CAHM3_A/H Tags
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