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Vishay General Semiconductor - Diodes Division SMBJ40AHE3_B/H
- Part No.:
- SMBJ40AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40AHE3_B/H.pdf
- Description:
- 600W,40V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,222
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Product details
Overview
SMBJ40AHE3_B/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 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 64.5 V maximum clamping voltage (VC) at 9.3 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMBJ40AHE3_B/H datasheet, SMBJ40AHE3_B/H pinout, SMBJ40AHE3_B/H application, or SMBJ40AHE3_B/H equivalent, this part delivers AEC-Q101 qualification, low incremental surge resistance, and fast response time for reliable transient suppression in harsh environments where ESD, load dump, and inductive switching surges occur.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response and stable clamping under repetitive transients. Its thermal resistance (RθJA = 100 °C/W) and junction temperature range (–55 °C to +150 °C) support operation in high-ambient industrial and automotive under-hood applications.
The SMBJ40AHE3_B/H meets MSL Level 1 per J-STD-020, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and is halogen-free compliant per Vishay's HM3/HE3 qualification framework - distinguishing it from commercial-grade E3/M3 variants by its AEC-Q101 stress testing and automotive traceability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 40 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC rail margin before clamping initiates. |
| VBR (Breakdown Voltage) | 44.4–49.1 V at 1 mA - guaranteed conduction onset range; ensures predictable turn-on during transients without premature triggering. |
| VC (Clamping Voltage) | 64.5 V at IPPM = 9.3 A - peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream IC survivability. |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity under standardized 10/1000 µs waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| IFSM (Surge Current) | 100 A - single half-sine 8.3 ms surge rating; supports load-dump immunity in 12 V automotive systems. |
| TJ max. | +150 °C - maximum junction temperature; allows deployment in engine control units and motor drives without derating at 85 °C ambient. |
| Package | SMB (DO-214AA) - 0.220" × 0.155" footprint with 0.086" lead spacing; compatible with automated SMT placement and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking on one end. Terminals are matte tin-plated, J-STD-002 solderable, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; forms clamping loop with cathode during transient events. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail); conducts surge current to anode when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, HTRB, and ESD testing - required for powertrain and body electronics. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients such as ISO 7637-2 Pulse 5a (load dump) without degradation across 100,000+ cycles. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream MOSFETs or microcontrollers during clamping - critical for 3.3 V/5 V logic protection. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; eliminates production delays and moisture-related delamination risk. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure - key for 15-year automotive service life. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 12 V battery feed to engine control unit (ECU) exposed to load dump surges up to 60 V and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and input filter capacitor. Use Value: Limits transient voltage to ≤64.5 V during 9.3 A surges, preventing damage to upstream DC/DC converters and MCU power pins. |
Use Scenario: Analog output line (0–10 V) from pressure sensor in factory automation PLC module. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor output trace, adjacent to connector. Use Value: Clamps ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge events within <1 ns, preserving ADC accuracy and signal integrity. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
|
Use Scenario: –48 V DC power input to telecom base station card subjected to lightning-induced surges on long-line feeds. IC Role / Device Role / Timing Role: Primary overvoltage clamp before DC/DC isolation stage. Use Value: Absorbs 600 W transient energy while maintaining clamping below –70 V, protecting isolated gate drivers and optocouplers. |
Use Scenario: 24 V supply rail feeding H-bridge driver IC in smart washing machine motor control board. IC Role / Device Role / Timing Role: Rail-level TVS on main power input to suppress inductive kickback from brushed DC motor commutation. Use Value: Withstands 100 A 8.3 ms half-sine surges from motor stall events without parametric shift or failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40AHM3_B/H | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference; selected only when halogen-free compliance is mandated by OEM environmental policy (e.g., VW 80101). | Direct material substitution where RoHS + halogen-free requirements apply; no design or layout change needed. |
| SMCJ40AHE3_A/H | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (60 °C/W) and 1500 W PPPM rating. | Used where higher surge energy handling (>600 W) or improved thermal dissipation is required - e.g., heavy-duty industrial motor drives. | Select when system-level surge testing exceeds 600 W or board layout allows larger footprint; not drop-in due to different pad layout. |
Compared with SMBJ40AHE3_B/H, the HM3 variant offers identical performance with halogen-free construction, while the SMCJ40AHE3_A/H provides higher power handling in a physically larger package - making the SMBJ40AHE3_B/H optimal for space-constrained AEC-Q101-compliant designs needing precise 600 W capability.
Availability
SMBJ40AHE3_B/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom power supplies requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMBJ40AHE3_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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMBJ series is engineered for robust transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping performance across temperature, lifetime, and surge repetition rate.
FAQ
What does the "HE3" suffix indicate in SMBJ40AHE3_B/H?
The "HE3" suffix denotes that SMBJ40AHE3_B/H is RoHS-compliant and AEC-Q101 qualified, distinguishing it from commercial-grade E3 variants. It confirms compliance with automotive stress testing standards including temperature cycling, highly accelerated life testing (HALT), and ESD robustness - essential for use in safety-critical vehicle subsystems.
Is SMBJ40AHE3_B/H bidirectional or unidirectional?
SMBJ40AHE3_B/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only during reverse-biased transients above VBR and blocks forward current - unlike "CA"-suffixed parts, which are bidirectional and symmetrical in both polarities.
What is the maximum clamping voltage of SMBJ40AHE3_B/H at rated surge current?
The maximum clamping voltage (VC) of SMBJ40AHE3_B/H is 64.5 V at 9.3 A peak pulse current (IPPM) under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the protected circuit sees no more than 64.5 V during standardized surge events.
Can SMBJ40AHE3_B/H replace SMBJ40AE3 in an existing design?
Yes - SMBJ40AHE3_B/H is a direct replacement for SMBJ40AE3 in terms of electrical parameters and package, but adds AEC-Q101 qualification and automotive traceability. No PCB changes are required; however, qualification documentation and lot-level test reports must be updated to reflect HE3's automotive-grade status.
What is the thermal resistance of SMBJ40AHE3_B/H, and how does it affect layout?
SMBJ40AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain TJ ≤ 150 °C under sustained 5 W dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks - especially in sealed automotive enclosures.
SMBJ40AHE3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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)
SMBJ40AHE3_B/H FAQ
1.How can I place an order for SMBJ40AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40AHE3_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 SMBJ40AHE3_B/H reliable?
The price and inventory of SMBJ40AHE3_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 SMBJ40AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ40AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40AHE3_B/H?
SMBJ40AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40AHE3_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 SMBJ40AHE3_B/H?
For technical support, including SMBJ40AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ40AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ40AHE3_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 SMBJ40AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ40AHE3_B/H?
All SMBJ40AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40AHE3_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 SMBJ40AHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ40AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40AHE3_B/H Tags
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