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Vishay General Semiconductor - Diodes Division SMBJ7.0AHE3/52
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- Part No.:
- SMBJ7.0AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0AHE3/52.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,581
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Product details
Overview
SMBJ7.0AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA, 12.0 V maximum clamping voltage (VC) at 50.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive body control modules to safeguard CAN transceivers against load dump and inductive switching transients.
For engineers reviewing the SMBJ7.0AHE3/52 datasheet, SMBJ7.0AHE3/52 pinout, SMBJ7.0AHE3/52 application, or SMBJ7.0AHE3/52 equivalent, key selection criteria include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.54), 100 °C/W junction-to-ambient thermal resistance, and compatibility with automated SMT placement on standard SMB (DO-214AA) footprints.
Technical Context
This unidirectional TVS operates as a voltage-clamped crowbar device: under normal bias it presents <1 µA reverse leakage at 7.0 V, then rapidly transitions to low-impedance conduction when transient voltage exceeds VBR, limiting downstream voltage to ≤12.0 V at 50 A. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The SMBJ7.0AHE3/52 is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 - confirming suitability for high-reliability automotive PCB assembly without solderability degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse working voltage before significant leakage; sets upper limit for protected circuit's nominal DC rail. |
| VBR @ IT=10 mA | 7.78–8.60 V - Verified breakdown threshold range; ensures predictable turn-on margin above VWM for robust noise immunity. |
| VC @ IPPM=50.0 A | 12.0 V - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by downstream ICs like microcontrollers or transceivers. |
| PPPM | 600 W - Peak pulse power handling with 0.01% duty cycle; supports protection against ISO 7637-2 Pulse 1/2a/5a automotive transients. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); validates capability to survive accidental polarity reversal events. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments without derating at 50 °C ambient. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on 0.2" × 0.2" copper pads; informs board-level thermal design for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), compatible with IPC-7351B SMB footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; must be routed with minimal inductance to maintain clamping effectiveness. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., CAN_H, 5 V rail); marked by molded band; reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated ISO 7637-2 Pulse 5a (load dump) surges up to 12 V system without degradation. |
| Clamping voltage ≤12.0 V at 50 A | Provides ≥2.5 V margin below typical 14.5 V automotive supply peaks, protecting 12 V-rated interface ICs. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without popcorn cracking or delamination risk. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over 15+ year automotive service life. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting 12 V CAN_H/CAN_L lines from battery load dump and relay coil flyback in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between CAN transceiver pins and chassis ground to clamp transients before they reach PHY layer. Use Value: Limits induced voltage to ≤12.0 V during 100 V/500 ms load dump events, preventing CAN transceiver latch-up or permanent damage. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field wiring surge coupling. IC Role / Device Role / Timing Role: Primary front-end protection device mounted directly at connector entry point, shunting surge energy to common ground. Use Value: Maintains input logic state integrity by clamping fast-rising transients (≤1 ns rise time) to safe levels before signal conditioning circuitry. |
| Consumer Appliance Motor Drive | Telecom Power Supply Input |
|
Use Scenario: Safeguarding MCU GPIOs and gate drivers connected to brushed DC motor commutation circuits. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp across motor driver supply rails to absorb inductive kickback from PWM switching. Use Value: Prevents >100 V flyback spikes from exceeding MCU absolute maximum ratings, eliminating need for external snubbers. |
Use Scenario: Secondary-stage surge suppression on 48 V telecom rectifier outputs feeding base station backplane. IC Role / Device Role / Timing Role: Final-line defense after MOV-based primary protection, absorbing residual high-frequency ring wave energy. Use Value: Reduces post-MOV overshoot from ~200 V to ≤12.0 V, meeting GR-1089-CORE Class B immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A-E3/52 | Commercial-grade version; same VWM, VBR, VC, and PPPM, but not AEC-Q101 qualified. | Limited to non-automotive industrial or consumer use where automotive reliability certification is not required. | Select when cost sensitivity outweighs automotive qualification needs and thermal/environmental stress is moderate. |
| SMCJ7.0AHE3/52 | Same electrical specs but in larger SMC (DO-214AB) package; higher IPPM (82.5 A) and lower RθJA (60 °C/W). | Better suited for high-energy surge environments (e.g., outdoor telecom cabinets) requiring extended surge lifetime. | Choose when board space allows larger footprint and system-level surge testing exceeds 600 W single-event limits. |
Compared with SMBJ7.0AHE3/52, the E3/52 variant lacks AEC-Q101 validation and may require additional qualification for automotive deployment, while the SMCJ7.0AHE3/52 offers superior thermal performance and surge endurance at the cost of PCB area - making SMBJ7.0AHE3/52 optimal for space-constrained, certified automotive modules.
Availability
SMBJ7.0AHE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMBJ7.0AHE3/52 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 and automotive-grade qualification.
The SMBJ series is engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of SMBJ7.0AHE3/52 at its rated peak pulse current?
The SMBJ7.0AHE3/52 has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current of 50.0 A using the standardized 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream ICs. The SMBJ7.0AHE3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ7.0AHE3/52 suitable for automotive applications?
Yes, SMBJ7.0AHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3" indicating RoHS-compliant and AEC-Q101 validated construction. It meets MSL Level 1 moisture sensitivity and withstands 260 °C peak reflow, making it appropriate for engine control units, body electronics, and ADAS sensor modules. The SMBJ7.0AHE3/52 data sheet confirms qualification per the full AEC-Q101 stress test schedule.
What does the "HE3" suffix mean in SMBJ7.0AHE3/52?
The "HE3" suffix in SMBJ7.0AHE3/52 denotes a RoHS-compliant, AEC-Q101 qualified version with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards. It distinguishes this part from commercial-grade variants (e.g., "E3") and halogen-free versions ("HM3"). The "HE3" designation is critical for automotive procurement, ensuring compliance with both environmental and reliability requirements mandated by OEMs. SMBJ7.0AHE3/52 is traceable to Vishay's qualified manufacturing lots.
How does SMBJ7.0AHE3/52 differ from bidirectional TVS diodes like SMBJ7.0CA?
SMBJ7.0AHE3/52 is unidirectional and functions only in reverse breakdown, requiring correct polarity installation with the cathode band toward the protected line. In contrast, SMBJ7.0CA is bidirectional and symmetric - suitable for AC-coupled or differential lines like RS-485. The SMBJ7.0AHE3/52 offers lower leakage (<1 µA at 7.0 V) and higher surge current capability in its intended direction, whereas SMBJ7.0CA exhibits matched VBR in both directions but higher ID at VWM.
What is the thermal resistance of SMBJ7.0AHE3/52, and how does it affect layout?
The SMBJ7.0AHE3/52 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 minimum recommended pad layout per Vishay's datasheet; reducing pad size increases RθJA and risks thermal runaway during repetitive surges. For SMBJ7.0AHE3/52, maintaining full copper pour under both terminals and using thermal vias improves heat dissipation and sustains 5.0 W steady-state power handling.
SMBJ7.0AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 50A
- 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)
SMBJ7.0AHE3/52 FAQ
1.How can I place an order for SMBJ7.0AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0AHE3/52 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 SMBJ7.0AHE3/52 reliable?
The price and inventory of SMBJ7.0AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.0AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0AHE3/52?
SMBJ7.0AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0AHE3/52 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 SMBJ7.0AHE3/52?
For technical support, including SMBJ7.0AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0AHE3/52 requirements.
6.How does Aetrix verify that SMBJ7.0AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0AHE3/52 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 SMBJ7.0AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.0AHE3/52?
All SMBJ7.0AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0AHE3/52, 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 SMBJ7.0AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.0AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0AHE3/52 Tags
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