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Vishay General Semiconductor - Diodes Division SMBJ40CAHE3_B/H
- Part No.:
- SMBJ40CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40CAHE3_B/H.pdf
- Description:
- 600W,40V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,794
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Product details
Overview
SMBJ40CAHE3_B/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 40 V standoff voltage (VWM), 64.5 V maximum clamping voltage (VC) at 9.3 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ40CAHE3_B/H datasheet, SMBJ40CAHE3_B/H pinout, SMBJ40CAHE3_B/H application, or SMBJ40CAHE3_B/H equivalent, this device is selected for robust ESD and surge protection where bidirectional clamping, AEC-Q101 qualification, and low-profile SMB packaging are required in automotive-grade and high-reliability embedded systems.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) ranging from 44.4 V to 49.1 V at 1 mA test current. Its clamping behavior is defined under standardized 10/1000 µs surge conditions, delivering consistent VC ≤ 64.5 V up to IPPM = 9.3 A while maintaining low incremental surge resistance and sub-nanosecond response time.
The device is rated for TJ = -55 °C to +150 °C operation, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and carries AEC-Q101 qualification - confirmed by HE3 suffix - making it suitable for under-hood automotive modules and industrial control units requiring extended thermal stability and process reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 40 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 44.4 V min / 49.1 V max at IT = 1 mA - Ensures reliable turn-on within tight tolerance during transient events. |
| VC (Clamping Voltage) | 64.5 V at IPPM = 9.3 A - Limits downstream voltage stress to protected ICs during 10/1000 µs surges. |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients without failure when mounted on 5.0 mm × 5.0 mm copper pads. |
| IR (Reverse Leakage) | 1.0 µA max at VWM - Minimizes standby power loss and avoids false triggering in low-current circuits. |
| TJ Max | +150 °C - Enables deployment in engine-control units, motor drives, and other high-ambient-temperature environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress-test requirements including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no polarity marking; terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions; forms one side of symmetrical clamping path. |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions; completes bidirectional clamping loop with Anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V industrial buses with margin. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics with full stress-test compliance. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with high-volume automated assembly. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage exposure to downstream logic, improving system-level surge immunity. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from BLDC motor switching. IC Role / Device Role / Timing Role: Bidirectional TVS clamps ±100 V transients induced by MOSFET turn-off, preventing latch-up in isolated gate drivers. Use Value: Maintains functional safety integrity by limiting voltage stress to <65 V during repetitive 600 W surges, enabling >100,000 cycle reliability. |
Use Scenario: Surge suppression on LIN bus lines and door module sensor inputs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Fast-response TVS shunts transient energy before it reaches MCU I/O pins or transceiver front-ends. Use Value: AEC-Q101 qualification ensures survivability under automotive temperature cycling (-40 °C to +125 °C ambient) and vibration profiles. |
| Telecom Power Supply Inputs | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection of 48 V DC-DC converters against lightning-induced surges on PoE or remote power feeds. IC Role / Device Role / Timing Role: Primary clamping device placed before input filter capacitors to absorb line-to-ground transients. Use Value: 64.5 V clamping voltage allows use with 48 V nominal rails while preserving >10 V margin to converter overvoltage shutdown threshold. |
Use Scenario: ESD and EFT protection on touch-panel interfaces and relay driver outputs in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bidirectional suppressor placed directly at connector entry points. Use Value: Sub-ns response time prevents ESD pulses from propagating into microcontroller GPIOs, meeting IEC 61000-4-2 Level 4 (8 kV contact). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CAHM3_B/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM sustainability policies. | Direct substitution where halogen-free bill-of-materials is required; same footprint and thermal performance. |
| SMAJ40CAHE3_A/H | Lower PPPM (400 W), higher VC (69.4 V), SMA package (smaller, lower thermal mass). | Not suitable for 600 W surge environments; limited to lower-energy transients or space-constrained consumer designs. | Consider only if board area is critical and surge threat level is ≤ IEC 61000-4-5 Level 2; not drop-in for SMBJ40CAHE3_B/H. |
Compared with SMBJ40CAHE3_B/H, SMBJ40CAHM3_B/H offers identical protection performance with halogen-free construction, while SMAJ40CAHE3_A/H trades peak power capability and clamping performance for reduced PCB footprint - making the original SMBJ40CAHE3_B/H optimal for automotive and industrial applications demanding full 600 W surge handling and AEC-Q101 assurance.
Availability
SMBJ40CAHE3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply with AEC-Q101 traceability and long-term production support.
Supply support for SMBJ40CAHE3_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, thermal performance, and automotive qualification.
The SMBJ series targets high-energy transient suppression in harsh environments, with design focus on industrial automation, automotive electronics, and telecom infrastructure where robustness and standardized qualification are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ40CAHE3_B/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ40CAHE3_B/H provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ40A), it has no polarity marking and conducts equally in either direction - essential for protecting AC-coupled lines, differential buses, or floating sensors where voltage polarity is undefined.
Is SMBJ40CAHE3_B/H suitable for automotive applications?
Yes, SMBJ40CAHE3_B/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix, and rated for junction temperatures up to +150 °C. It is designed for automotive body electronics, infotainment power supplies, and sensor interfaces where validated reliability under thermal cycling, humidity, and mechanical stress is required - making SMBJ40CAHE3_B/H appropriate for Tier 1 and OEM production programs.
How does SMBJ40CAHE3_B/H compare to unidirectional SMBJ40AHE3_B/H?
SMBJ40CAHE3_B/H differs from SMBJ40AHE3_B/H in polarity and clamping symmetry: SMBJ40CAHE3_B/H clamps ±40 V transients bidirectionally with identical VBR and VC in both directions, while SMBJ40AHE3_B/H only clamps positive transients (cathode-biased) and requires external circuit polarity awareness. SMBJ40CAHE3_B/H eliminates need for orientation checks during placement and simplifies layout for floating nodes.
What is the thermal resistance of SMBJ40CAHE3_B/H, and how does it affect PCB layout?
SMBJ40CAHE3_B/H has RθJA = 100 °C/W (typical) and RθJL = 20 °C/W (typical). To achieve rated 600 W pulse power, Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Reducing pad size or omitting thermal vias increases junction temperature - potentially derating IPPM and shortening lifetime. Proper layout ensures SMBJ40CAHE3_B/H maintains clamping performance under repeated surge stress.
Does SMBJ40CAHE3_B/H meet UL recognition requirements?
Yes, SMBJ40CAHE3_B/H carries Underwriters Laboratories recognition under UL 497B (file E136766) for both unidirectional and bidirectional transient protectors. This certification confirms compliance with safety standards for surge protective components used in telecommunications and industrial equipment - supporting SMBJ40CAHE3_B/H integration into UL-listed end products without additional system-level validation.
SMBJ40CAHE3_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):
- 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)
SMBJ40CAHE3_B/H FAQ
1.How can I place an order for SMBJ40CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40CAHE3_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 SMBJ40CAHE3_B/H reliable?
The price and inventory of SMBJ40CAHE3_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 SMBJ40CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ40CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40CAHE3_B/H?
SMBJ40CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40CAHE3_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 SMBJ40CAHE3_B/H?
For technical support, including SMBJ40CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ40CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ40CAHE3_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 SMBJ40CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ40CAHE3_B/H?
All SMBJ40CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40CAHE3_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 SMBJ40CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ40CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40CAHE3_B/H Tags
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