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Vishay General Semiconductor - Diodes Division SMBJ3V3HE3_B/I
- Part No.:
- SMBJ3V3HE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ3V3HE3_B/I.pdf
- Description:
- 600W,3.3V UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,614
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Product details
Overview
SMBJ3V3HE3_B/I 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 sensitive electronics. It features a 3.3 V stand-off voltage (VWM), 600 W peak pulse power rating (10/1000 µs), clamping voltage of 7.5 V at 38.9 A, and AEC-Q101 qualification for automotive use - deployed on power rails and I/O lines of automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMBJ3V3HE3_B/I datasheet, SMBJ3V3HE3_B/I pinout, SMBJ3V3HE3_B/I application, or SMBJ3V3HE3_B/I equivalent, key selection criteria include its 3.3 V reverse stand-off voltage, 6.4 V minimum breakdown voltage at 1 mA, 7.5 V maximum clamping voltage under 38.9 A surge, AEC-Q101 qualification status, and SMB package thermal resistance (RθJA = 100 °C/W).
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for fast response (<1 ns) and low incremental surge resistance. Its breakdown behavior follows IEEE C62.35 standards, with VBR specified at 1 mA test current and temperature coefficient of +0.057 %/°C.
The SMBJ3V3HE3_B/I is rated for repetitive 10/1000 µs surge waveforms at 0.01 % duty cycle, derated above 25 °C per Fig. 2, and supports peak forward surge current (IFSM) up to 100 A (8.3 ms half-sine). It meets MSL Level 1 per J-STD-020 and is RoHS-compliant with matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 3.3 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min) | 6.4 V at IT = 1 mA - Ensures reliable turn-on during transients exceeding normal rail voltage |
| VC (max) | 7.5 V at IPPM = 38.9 A - Limits protected circuit voltage during worst-case 600 W surge |
| PPPM | 600 W (10/1000 µs) - Withstands high-energy ESD and load-dump transients common in automotive systems |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
| RθJA | 100 °C/W - Requires minimal copper pad area (0.2" × 0.2") for thermal management in space-constrained layouts |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; carries full surge current during clamping |
| Cathode | High-side connection point | Connected to protected line (e.g., 3.3 V rail); band-marked end defines polarity |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles ISO 7637-2 Pulse 1/2a/5a transients without degradation in automotive power nets |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 µA at VWM) across temperature and lifetime |
| AEC-Q101 qualification | Validates suitability for automotive control modules requiring zero-failure field performance |
| MSL Level 1 | Enables standard reflow assembly without pre-baking; peak IR reflow ≤260 °C |
| Low profile SMB package | Reduces board footprint vs. SMA/SMB alternatives while maintaining 600 W capability |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting LIN bus transceiver inputs and 3.3 V microcontroller supply rails against load dump and battery reversal transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between 3.3 V rail and ground, triggered within nanoseconds to limit voltage excursion. Use Value: Prevents latch-up or permanent damage to MCU I/O cells during 12 V system transients up to ±100 V, per ISO 16750-2. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA loop drivers) and digital I/O of PLC analog input modules. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across signal-to-ground, absorbing induced surges from nearby motor switching. Use Value: Maintains signal integrity below 7.5 V clamp level, ensuring ADC reference stability and preventing op-amp saturation during 1 kV/µs transients. |
| Consumer USB Power Delivery Interface | Telecom Base Station DC Power Input |
Use Scenario: Overvoltage protection on VBUS line of USB-C PD controllers handling variable 3.3–20 V inputs. IC Role / Device Role / Timing Role: Primary TVS on input rail upstream of buck converter, activated before internal FETs experience overstress. Use Value: Clamps 30 V transients to ≤7.5 V within <1 ns, enabling use of lower-voltage-rated downstream MOSFETs and reducing BOM cost. | Use Scenario: Front-end protection of -48 V telecom power distribution boards against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Secondary clamping stage after GDT or MOV, fine-tuning suppression to protect DC-DC controller ICs. Use Value: Provides precise 7.5 V clamping window for 3.3 V logic supervisors and monitoring circuits, avoiding false resets during 600 W surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ3V3A-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC specs, identical SMB package | Lacks automotive qualification; suitable for consumer/industrial designs without AEC requirements | Select when automotive qualification is not required and cost optimization is prioritized |
| SMCJ3V3AHE3_A/H | Higher 1500 W PPPM, larger SMC (DO-214AB) package, same VWM/VBR/VC ratings | Used where higher surge margin is needed but PCB layout allows larger footprint | Choose when system-level surge testing exceeds 600 W and thermal mass permits SMC footprint |
Compared with SMBJ3V3A-E3/52 and SMCJ3V3AHE3_A/H, the SMBJ3V3HE3_B/I uniquely delivers AEC-Q101 compliance in the compact SMB footprint - enabling automotive integration without sacrificing board space or requiring derating for qualification-driven design margins.
Availability
SMBJ3V3HE3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply with guaranteed AEC-Q101 conformance.
Supply support for SMBJ3V3HE3_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, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and qualification-grade robustness are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ3V3HE3_B/I at its rated peak pulse current?
The SMBJ3V3HE3_B/I has a maximum clamping voltage (VC) of 7.5 V at its rated peak pulse current (IPPM) of 38.9 A, measured using the standardized 10/1000 µs waveform. This value ensures protected downstream components - such as 3.3 V MCUs or interface ICs - remain within safe absolute maximum ratings during surge events. The SMBJ3V3HE3_B/I achieves this clamping performance while maintaining low incremental resistance and sub-nanosecond response time.
Is SMBJ3V3HE3_B/I qualified for automotive applications?
Yes, SMBJ3V3HE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88392 (Rev. 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SMBJ3V3HE3_B/I suitable for under-hood and body electronics in passenger vehicles and commercial vehicles. Its qualification status is integral to the part number and verified in production lot traceability.
What does the "_B/I" suffix in SMBJ3V3HE3_B/I indicate?
Per Vishay's ordering information table (page 3), the "_B/I" suffix denotes packaging configuration: "B" indicates tape-and-reel packaging with embossed carrier tape, and "I" specifies 3200 units per 13-inch diameter reel. This format ensures compatibility with high-speed automated placement equipment and supports volume manufacturing. The base "HE3" confirms RoHS compliance and AEC-Q101 qualification, independent of the reel suffix.
Can SMBJ3V3HE3_B/I be used in bidirectional protection circuits?
No, SMBJ3V3HE3_B/I is a unidirectional TVS diode, as indicated by its "A" suffix (SMBJ3V3A family) and cathode-band polarity marking. Bidirectional variants use the "CA" suffix (e.g., SMBJ3V3CA). Using SMBJ3V3HE3_B/I in bidirectional applications would result in forward conduction during negative transients, potentially causing failure. For symmetric surge protection, select an explicitly designated bidirectional part - the SMBJ3V3HE3_B/I must be applied with correct anode-cathode orientation relative to the protected rail.
What is the thermal resistance junction-to-ambient for SMBJ3V3HE3_B/I?
The SMBJ3V3HE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per datasheet section "THERMAL CHARACTERISTICS". This value assumes no additional heatsinking and defines the steady-state temperature rise under DC power dissipation. For pulsed operation, transient thermal impedance curves (Fig. 5) govern short-duration surge thermal behavior - critical for validating SMBJ3V3HE3_B/I survivability during repetitive transients.
SMBJ3V3HE3_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):
- 3.3V
- Voltage - Breakdown (Min):
- 4.1V
- Voltage - Clamping (Max) @ Ipp:
- 7.3V
- Current - Peak Pulse (10/1000µs):
- 50A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 5200pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ3V3HE3_B/I FAQ
1.How can I place an order for SMBJ3V3HE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ3V3HE3_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 SMBJ3V3HE3_B/I reliable?
The price and inventory of SMBJ3V3HE3_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 SMBJ3V3HE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ3V3HE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ3V3HE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ3V3HE3_B/I?
SMBJ3V3HE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ3V3HE3_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 SMBJ3V3HE3_B/I?
For technical support, including SMBJ3V3HE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ3V3HE3_B/I requirements.
6.How does Aetrix verify that SMBJ3V3HE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ3V3HE3_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 SMBJ3V3HE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ3V3HE3_B/I?
All SMBJ3V3HE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ3V3HE3_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 SMBJ3V3HE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ3V3HE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ3V3HE3_B/I Tags
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