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Vishay General Semiconductor - Diodes Division SMBJ54AHM3/H
- Part No.:
- SMBJ54AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54AHM3/H.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,872
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Product details
Overview
SMBJ54AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. 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.
For engineers reviewing the SMBJ54AHM3/H datasheet, SMBJ54AHM3/H pinout, SMBJ54AHM3/H application, or SMBJ54AHM3/H equivalent, this device is selected for high-reliability transient suppression in automotive power supplies, industrial sensor interfaces, and telecom DC input stages where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are critical.
Technical Context
This unidirectional TVS diode functions as a voltage-clamped shunt protector: under normal operation it presents high impedance (>1 µA leakage at 54 V), but triggers into low-impedance conduction when transients exceed its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and repeatable clamping performance across temperature.
The SMBJ54AHM3/H is rated for 600 W peak pulse power per 10/1000 µs waveform with 0.01% duty cycle, supports 100 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits a low incremental surge resistance that minimizes voltage overshoot during fast transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Confirmed breakdown range ensuring reliable triggering without premature conduction. |
| VC @ IPPM | 87.1 V at 6.9 A - Clamped voltage during full-rated 600 W transient; determines protected circuit's maximum stress level. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates immunity to common lightning/inductive spikes. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms); supports high-energy inrush or fault-current events. |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated assembly. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band on one end; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes shunt path during overvoltage event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 54 V rail); carries transient current to ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
| Halogen-free & RoHS-compliant | HM3 suffix denotes halogen-free molding compound and lead finish meeting EU RoHS Directive 2011/65/EU. |
| 600 W peak pulse power | Withstands high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation in automotive and industrial systems. |
| Fast response time | <1 ns turn-on enables protection of sensitive ICs against ESD (IEC 61000-4-2) and fast-rising surges. |
| MSL Level 1 | Moisture sensitivity level 1 per J-STD-020 allows unlimited floor life and reflow up to 260 °C peak. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 48 V/54 V battery-supplied ECUs from load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Shunt clamping element placed between power rail and chassis ground; triggered within nanoseconds of overvoltage onset. Use Value: Limits rail voltage to ≤87.1 V during 600 W pulses, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors exposed to cable-induced surges in factory automation. IC Role / Device Role / Timing Role: Unidirectional TVS connected in parallel with sensor supply line; absorbs coupled energy from nearby motor switching. Use Value: Maintains signal integrity by clamping transients before they reach precision ADC inputs, reducing calibration drift risk. |
| Telecom DC Input Stage | Consumer Power Adapter Output |
|
Use Scenario: Secondary-side overvoltage protection in PoE-powered network switches and base stations. IC Role / Device Role / Timing Role: Standoff-rated TVS on 54 V DC input bus; activated only during fault conditions like hot-swap insertion or upstream regulator failure. Use Value: Prevents catastrophic failure of Ethernet PHYs and FPGAs by limiting bus voltage excursion to 87.1 V under 6.9 A surge. |
Use Scenario: Output rail protection in universal AC/DC adapters supplying 54 V to laptops or docking stations. IC Role / Device Role / Timing Role: Final-stage transient suppressor after secondary rectification and filtering; guards against output short-circuit recovery spikes. Use Value: Ensures compliance with UL 62368-1 transient immunity requirements while maintaining compact SMB footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54AHE3/H | Same electrical specs, RoHS-compliant but not halogen-free; uses standard SnPb-free matte tin plating without halogen-free compound. | Approved for commercial/industrial use; not qualified to AEC-Q101; unsuitable for automotive under-hood deployment. | Select SMBJ54AHE3/H where halogen-free requirement is waived and automotive qualification is unnecessary. |
| SMAJ54A-M3/52 | Lower 400 W PPPM, SMA package (smaller footprint, higher thermal resistance), same VWM/VBR range. | Limited to lower-energy transients; less robust in high-ambient or high-pulse-duty scenarios due to reduced power rating and thermal performance. | Choose SMAJ54A-M3/52 only when board space is constrained and transient threat level is below 400 W. |
Compared with SMBJ54AHE3/H and SMAJ54A-M3/52, the SMBJ54AHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and full 600 W pulse capability in the SMB outline-making it the only option qualified for demanding automotive and green-industrial designs requiring both reliability and regulatory compliance.
Availability
SMBJ54AHM3/H is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface design, and telecom DC input protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBJ54AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMBJ54AHM3/H at its rated peak pulse current?
The SMBJ54AHM3/H has a maximum clamping voltage (VC) of 87.1 V at its rated peak pulse current (IPPM) of 6.9 A, measured using the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on the protected circuit during a full 600 W transient event and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2. The SMBJ54AHM3/H maintains this clamping performance across its specified operating temperature range.
Is SMBJ54AHM3/H qualified for automotive applications?
Yes, SMBJ54AHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in the Vishay datasheet footnote on page 3. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and mechanical shock-validating its suitability for under-hood and powertrain-related automotive modules. The SMBJ54AHM3/H meets the reliability requirements for automotive-grade transient suppression where sustained operation up to +150 °C is required.
What does the "HM3" suffix signify in SMBJ54AHM3/H?
The "HM3" suffix in SMBJ54AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "M" identifies halogen-free molding compound, and "3" confirms RoHS compliance per EU Directive 2011/65/EU. This distinguishes it from "HE3" (AEC-Q101 + RoHS, not halogen-free) and "E3" (RoHS only). The SMBJ54AHM3/H thus satisfies strict environmental and automotive reliability mandates simultaneously.
Can SMBJ54AHM3/H be used in bidirectional configurations?
No, SMBJ54AHM3/H is a unidirectional TVS diode, as confirmed by its part number structure and the Vishay datasheet's "UNI" column in the electrical characteristics table. Bidirectional variants use the "CA" suffix (e.g., SMBJ54CA). Using SMBJ54AHM3/H in a bidirectional application would result in forward conduction during negative transients, potentially causing failure. For bidirectional protection, select SMBJ54CA or equivalent-never substitute SMBJ54AHM3/H without circuit redesign.
What is the thermal resistance of SMBJ54AHM3/H from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SMBJ54AHM3/H is 100 °C/W, measured on the standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad layout per JEDEC standards. This value assumes no additional heatsinking and directly impacts power derating above 25 °C ambient. The SMBJ54AHM3/H also has RθJL = 20 °C/W (junction to lead), supporting effective heat transfer to PCB copper when properly mounted-critical for sustained surge handling in industrial environments.
SMBJ54AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ54AHM3/H FAQ
1.How can I place an order for SMBJ54AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54AHM3/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 SMBJ54AHM3/H reliable?
The price and inventory of SMBJ54AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54AHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ54AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54AHM3/H?
SMBJ54AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54AHM3/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 SMBJ54AHM3/H?
For technical support, including SMBJ54AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54AHM3/H requirements.
6.How does Aetrix verify that SMBJ54AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ54AHM3/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 SMBJ54AHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ54AHM3/H?
All SMBJ54AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54AHM3/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 SMBJ54AHM3/H part is unused and in its original packaging.
Return procedure for SMBJ54AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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