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Vishay General Semiconductor - Diodes Division SMBJ40AHE3_B/I
- Part No.:
- SMBJ40AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40AHE3_B/I.pdf
- Description:
- 600W,40V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,159
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Product details
Overview
SMBJ40AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping inductive switching transients and lightning-induced surges on power 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 (10/1000 µs waveform), suitable for protecting MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMBJ40AHE3_B/I datasheet, SMBJ40AHE3_B/I pinout, SMBJ40AHE3_B/I application, or SMBJ40AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamping device in reverse-biased configuration, triggering when transient voltage exceeds its breakdown threshold to shunt surge current away from protected circuitry. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), while the low incremental surge resistance minimizes clamping overshoot during high-current transients.
The SMBJ40AHE3_B/I is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its unidirectional polarity-marked by cathode band-and matte tin-plated leads support automated SMT assembly and solderability per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (min/max) | 44.4 V / 49.1 V at IT = 1 mA - Breakdown onset range; ensures reliable turn-on above VWM with margin against false triggering. |
| VC @ IPPM | 64.5 V at 9.3 A - Clamped voltage under 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; low value preserves efficiency in high-impedance bias networks. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs heatsinking requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking on unidirectional variants. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated for lead-free soldering compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; completes current path during forward surge events (e.g., reverse polarity faults). |
| Cathode (banded end) | Clamping reference terminal | Connected to higher-potential side (e.g., VBUS or signal line); defines reverse-bias orientation for transient clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in engine control and ADAS modules. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated high-energy transients per ISO 7637-2 Pulse 1/2a/3a without degradation-critical for 12 V/24 V vehicle systems. |
| UL 497B recognized (QVGQ2) | Approved for telecom and industrial surge protection applications requiring certified safety compliance and file number E136766. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without moisture-related popcorning or delamination risks. |
| Glass passivated junction | Ensures stable VBR and low ID over lifetime and temperature extremes-reduces field failure risk in harsh environments. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontrollers against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Unidirectional clamping element placed across MOSFET gate-source or supply rail inputs. Use Value: Limits transient voltage to ≤64.5 V, preventing gate oxide rupture and logic upset in 3.3 V/5 V control ICs. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between LIN signal and ground, with cathode to signal line. Use Value: Maintains 40 V stand-off while clamping 10/1000 µs surges up to 9.3 A-preserving signal integrity during ISO 16750-2 tests. |
| Telecom Power Feeds | Consumer AC-DC Adapters |
|
Use Scenario: Input-stage protection on PoE-powered devices subjected to lightning-induced common-mode surges on Ethernet pairs. IC Role / Device Role / Timing Role: Unidirectional TVS mounted between PSE-side DC feed and ground, cathode to positive rail. Use Value: Withstands 600 W pulses without degradation, meeting UL 497B Class B requirements for telecom infrastructure. |
Use Scenario: Secondary-side overvoltage clamp on 12 V/19 V output rails of wall adapters exposed to capacitor discharge transients. IC Role / Device Role / Timing Role: Clamping diode placed across output capacitor to limit post-regulator surge propagation. Use Value: 1.0 µA leakage at 40 V prevents standby power loss; 64.5 V VC ensures downstream USB-PD or charging ICs remain within ABS MAX 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 |
|---|---|---|---|
| SMBJ40AHM3_B/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU automotive Tier 1 programs). | Choose SMBJ40AHM3_B/I when halogen-free composition is required; otherwise SMBJ40AHE3_B/I offers standard RoHS compliance. |
| SMCJ40AHE3_A/H | Larger SMC (DO-214AB) package with higher 1500 W PPPM rating and 15.4 A IPPM; same VWM/VBR/VC specs. | Used where higher surge energy handling is needed (e.g., main AC input stage), but requires larger PCB footprint and different pad layout. | Choose SMCJ40AHE3_A/H only if 1500 W surge rating is required; SMBJ40AHE3_B/I is optimal for space-constrained board-level protection. |
Compared with SMBJ40AHM3_B/I, the SMBJ40AHE3_B/I offers identical protection performance with standard RoHS compliance, while SMCJ40AHE3_A/H provides higher surge capacity at the cost of increased size-making SMBJ40AHE3_B/I the preferred choice for compact, AEC-Q101-compliant designs.
Availability
SMBJ40AHE3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer AC-DC adapters requiring stable component supply and AEC-Q101-qualified surge protection.
Supply support for SMBJ40AHE3_B/I 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, power efficiency, and automotive qualification.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom systems where precise clamping and long-term stability are critical.
FAQ
What is the polarity configuration of SMBJ40AHE3_B/I?
The SMBJ40AHE3_B/I is a unidirectional TVS diode, with the cathode identified by a visible band on the SMB (DO-214AA) package. It conducts in forward bias like a standard diode and clamps transients in reverse bias above its breakdown voltage. This polarity must be observed during PCB layout to ensure correct protection directionality-connecting cathode to the higher-potential node of the protected line.
Is SMBJ40AHE3_B/I qualified for automotive applications?
Yes, SMBJ40AHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392, Revision: 09-Jan-2024). This qualification covers stress tests including HTGB, HTRB, and temperature cycling, making SMBJ40AHE3_B/I suitable for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SMBJ40AHE3_B/I under surge conditions?
The SMBJ40AHE3_B/I has a maximum clamping voltage (VC) of 64.5 V at 9.3 A peak pulse current (IPPM), tested with a 10/1000 µs waveform. This value represents the upper voltage limit imposed on protected circuitry during worst-case transient events and is critical for ensuring downstream components-such as 60 V-rated MOSFETs or 3.3 V microcontrollers with external protection-remain within their absolute maximum ratings.
Does SMBJ40AHE3_B/I meet UL safety standards?
Yes, SMBJ40AHE3_B/I is Underwriters Laboratories (UL) recognized under standard UL 497B for protectors, with file number E136766. This certification applies to both unidirectional and bidirectional variants and confirms compliance for use in telecom, industrial, and consumer equipment requiring third-party safety validation for surge suppression components.
What is the thermal resistance of SMBJ40AHE3_B/I, and how does it affect layout?
The SMBJ40AHE3_B/I 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 minimal copper area; increasing pad size or adding thermal vias reduces RθJA and improves power dissipation capability. For sustained surge duty cycles or elevated ambient temperatures, thermal derating per Figure 2 in the datasheet must be applied to maintain TJ ≤ 150 °C.
SMBJ40AHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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/I FAQ
1.How can I place an order for SMBJ40AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40AHE3_B/I 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/I reliable?
The price and inventory of SMBJ40AHE3_B/I 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/I is usually 5 days.
3.What payment methods are accepted for SMBJ40AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40AHE3_B/I?
SMBJ40AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40AHE3_B/I 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/I?
For technical support, including SMBJ40AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ40AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ40AHE3_B/I 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/I meets industry standards.
7.What is the process for return or replacement of SMBJ40AHE3_B/I?
All SMBJ40AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40AHE3_B/I, 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/I part is unused and in its original packaging.
Return procedure for SMBJ40AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40AHE3_B/I Tags
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