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Vishay General Semiconductor - Diodes Division SMBJ54HE3/5B
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- Part No.:
- SMBJ54HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54HE3/5B.pdf
- Description:
- TVS DIODE 54VWM 96.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,199
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Product details
Overview
SMBJ54HE3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 SMBJ54HE3/5B datasheet, SMBJ54HE3/5B pinout, SMBJ54HE3/5B application, or SMBJ54HE3/5B equivalent, this device is selected for robust overvoltage protection on DC power rails and signal lines in automotive ECUs, industrial I/O modules, and telecom interface circuits where AEC-Q101 qualification, low clamping ratio, and high surge current handling are critical.
Technical Context
The SMBJ54HE3/5B operates as a unidirectional avalanche diode with cathode-band polarity marking, leveraging glass-passivated silicon junction technology for stable, repeatable breakdown behavior. Its 10/1000 µs waveform response delivers 6.9 A peak pulse current (IPPM) while maintaining a clamping voltage of 87.1 V - resulting in a clamping ratio (VC/VBR) of ~1.38 under rated surge conditions.
Thermally, it exhibits RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable operation on standard 0.2" × 0.2" copper pads without forced cooling. The device meets MSL Level 1 per J-STD-020 and is AEC-Q101 qualified - confirmed by HE3 suffix and Vishay's automotive ordering code designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 54 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below breakdown |
| VBR (Breakdown Voltage) | 60.0–66.3 V at 1 mA - precise avalanche onset range ensuring predictable triggering during transients |
| VC (Clamping Voltage) | 87.1 V at 6.9 A - limits downstream voltage stress during 600 W surge events |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - sustains high-energy transients common in automotive load-dump and industrial switching |
| IPPM (Peak Pulse Current) | 6.9 A - quantifies maximum transient current the device safely shunts without failure |
| TJ max. | +150 °C - supports operation in under-hood automotive and high-temperature industrial environments |
| Leakage (ID) | 1.0 µA max. at 54 V - ensures minimal power loss and signal integrity in standby or low-power states |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (reverse-biased mode) | Connected to protected line or signal path; conducts surge current toward ground when cathode is held at higher potential |
| Cathode | Current exit terminal (reverse-biased mode) | Typically tied to system ground or low-impedance return path; polarity band confirms correct orientation for unidirectional protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients from ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to downstream ICs such as microcontrollers and CAN transceivers |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with automated placement and high-volume manufacturing |
| Glass-passivated junction | Ensures long-term stability, low parameter drift, and resistance to humidity-induced degradation |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECU power inputs against load-dump transients up to 40 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp surges before they reach LDOs and MCU power pins. Use Value: Withstands 600 W pulses and maintains VC ≤ 87.1 V, preventing damage to 5 V/3.3 V logic supplies downstream. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive kickback in factory automation sensors. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to divert fast transients (<1 ns rise time) away from precision ADC front-ends. Use Value: Sub-100 ns response time and 1.0 µA leakage at 54 V preserve signal accuracy and minimize offset error in measurement circuits. |
| Telecom Interface Surge Protection | Consumer Device DC Input Protection |
|
Use Scenario: Safeguarding RS-485 transceiver VCC and bus lines against lightning-induced surges in outdoor base station equipment. IC Role / Device Role / Timing Role: Primary TVS on power rail combined with secondary TVS on differential bus lines to meet IEC 61000-4-5 Level 4 (4 kV) Use Value: 6.9 A IPPM rating and 87.1 V clamping ensure compliance with telecom surge immunity standards without derating. |
Use Scenario: Securing USB-C PD input stages in portable medical monitors against accidental 24 V adapter misconnection. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of buck converter to absorb overvoltage before regulator overvoltage lockout triggers. Use Value: 54 V VWM provides 20 % margin above 48 V PD profiles while 87.1 V VC stays below typical IC absolute maximum ratings. |
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-E3/5B | Commercial-grade variant (non-AEC-Q101); identical electrical specs but no automotive qualification | Lacks automotive reliability validation; suitable for industrial/commercial designs without AEC requirements | Select when cost sensitivity outweighs automotive qualification needs and environmental stress testing is not mandated |
| SMCJ54AHE3/5B | Same VWM/VBR but SMC (DO-214AB) package - 1.5× larger footprint, 1500 W PPPM, lower RθJA | Higher power handling and thermal margin; requires PCB layout change due to larger pad area | Choose when system-level surge tests exceed 600 W or ambient temperatures exceed 105 °C |
Compared with SMBJ54A-E3/5B, the SMBJ54HE3/5B adds AEC-Q101 qualification without sacrificing electrical performance; versus SMCJ54AHE3/5B, it trades 900 W extra pulse power for 30 % smaller board area and compatibility with dense automotive PCB layouts.
Availability
SMBJ54HE3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom infrastructure equipment requiring stable component supply with AEC-Q101 assurance and consistent surge performance.
Supply support for SMBJ54HE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust transient suppression in harsh environments - including automotive, industrial, and communications systems where failure modes must be tightly controlled.
FAQ
What is the meaning of the "HE3" suffix in SMBJ54HE3/5B?
The "HE3" suffix in SMBJ54HE3/5B indicates RoHS-compliant construction with AEC-Q101 qualification - confirming that the device meets automotive-grade reliability standards including temperature cycling, humidity testing, and surge endurance. This distinguishes it from commercial variants like SMBJ54A-E3/5B and ensures suitability for under-hood and safety-critical vehicle subsystems.
Does SMBJ54HE3/5B support bidirectional transient protection?
No, SMBJ54HE3/5B is a unidirectional TVS diode, as confirmed by its cathode band marking and specification table entries limited to unidirectional parameters (e.g., IFSM = 100 A, VF = 3.5 V max.). For bidirectional protection, Vishay specifies CA-suffix parts such as SMBJ54CA; using SMBJ54HE3/5B in bidirectional configurations may result in forward conduction and failure.
What is the maximum clamping voltage of SMBJ54HE3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ54HE3/5B is 87.1 V at 6.9 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage imposed on protected circuitry during a full-rated 600 W transient event.
Can SMBJ54HE3/5B be used in place of SMBJ54A-E3/5B without design changes?
Yes - SMBJ54HE3/5B is pin-to-pin and electrically identical to SMBJ54A-E3/5B in package (SMB/DO-214AA), polarity, and all key electrical parameters (VWM, VBR, VC, PPPM). The only difference is AEC-Q101 qualification; no PCB or schematic modifications are required when upgrading for automotive use.
What is the thermal resistance from junction to ambient for SMBJ54HE3/5B?
The typical junction-to-ambient thermal resistance (RθJA) of SMBJ54HE3/5B is 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. This value assumes natural convection and is critical for calculating worst-case junction temperature rise under continuous power dissipation or repetitive surge conditions.
SMBJ54HE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 96.3V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ54HE3/5B FAQ
1.How can I place an order for SMBJ54HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54HE3/5B 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 SMBJ54HE3/5B reliable?
The price and inventory of SMBJ54HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ54HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54HE3/5B?
SMBJ54HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54HE3/5B 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 SMBJ54HE3/5B?
For technical support, including SMBJ54HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54HE3/5B requirements.
6.How does Aetrix verify that SMBJ54HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ54HE3/5B 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 SMBJ54HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ54HE3/5B?
All SMBJ54HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54HE3/5B, 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 SMBJ54HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ54HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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