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Vishay General Semiconductor - Diodes Division SMBJ70HE3/52
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- Part No.:
- SMBJ70HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70HE3/52.pdf
- Description:
- TVS DIODE 70VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,399
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Product details
Overview
SMBJ70HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 113 V maximum clamping voltage (VC) at 5.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ70HE3/52 datasheet, SMBJ70HE3/52 pinout, SMBJ70HE3/52 application, or SMBJ70HE3/52 equivalent, key selection criteria include its AEC-Q101 qualification, low incremental surge resistance, fast response time (<1 ps), and compatibility with automated SMT placement on PCBs requiring high-reliability transient suppression per IEC 61000-4-5.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 70 V), then rapidly avalanches below 1 ns to divert transient energy away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable VBR tolerance (±5%) and long-term reliability across -55 °C to +150 °C operating junction temperature.
The device complies with UL 497B recognition (QVGQ2), meets J-STD-020 MSL Level 1 (260 °C reflow peak), and is rated for repetitive 0.01% duty cycle surges. Its thermal resistance (RθJA = 100 °C/W) assumes mounting on 0.2" × 0.2" copper pads - critical for sustaining 5.0 W steady-state power dissipation at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 48 V DC systems. |
| VBR (min/max) | 77.8 V / 86.0 V at IT = 1 mA - Tight breakdown window ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 113 V at 5.3 A (10/1000 µs) - Clamping voltage limits stress on protected circuitry during surge events. |
| PPPM | 600 W - Peak pulse power handling capacity for transient suppression per IEC 61000-4-5 Level 4 (4 kV EFT). |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine) supports inrush and fault-current scenarios. |
| TJ max. | +150 °C - Enables operation in under-hood automotive and industrial environments without derating. |
| Package | SMB (DO-214AA) - Low-profile SMT footprint (5.21 mm × 4.06 mm × 2.20 mm) compatible with standard pick-and-place equipment. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or clamping | Connected to lower-potential side (e.g., ground or return path); enables shunt clamping when VAK exceeds VBR. |
| Cathode | Current exit terminal; marked by band on package | Connected to protected line (e.g., 48 V rail); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS sensors. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges up to 4 kV per IEC 61000-4-5 without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs. |
| MSL Level 1 moisture sensitivity | Enables direct use from reel without baking - eliminates production delays and moisture-related popcorning in reflow. |
| Glass-passivated junction | Ensures stable leakage current (<1 µA at 70 V) and consistent VBR over 10+ year field life in humid environments. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontrollers against inductive kickback from 24–48 V DC solenoids and relays. IC Role / Device Role / Timing Role: Shunt TVS placed directly across MOSFET gate-source or supply input to clamp spikes <100 ns after onset. Use Value: Prevents gate oxide rupture and logic upset by limiting transient voltage to ≤113 V while maintaining >1 MΩ isolation at 70 V. |
Use Scenario: Surge suppression on LIN bus lines and sensor power feeds exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Unidirectional clamping element on 12 V supply rail upstream of LDOs and CAN transceivers. Use Value: Survives 100 A/8.3 ms surge per ISO 7637-2 Pulse 5a and maintains functionality after 1000+ cycles due to AEC-Q101 validation. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
Use Scenario: Input-stage protection for AC/DC adapters and PoE injectors subjected to AC line transients and Ethernet cable ESD. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side DC output (e.g., 48 V PSE port) to absorb coupled surges. Use Value: 600 W rating handles 10/1000 µs surges up to 4 kV; low thermal resistance (RθJL = 20 °C/W) prevents thermal runaway during repeated events. |
Use Scenario: Overvoltage safeguard for MCU I/O pins and relay coil drivers in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Point-of-load TVS on 5 V/3.3 V rails feeding Hall-effect sensors and optocouplers. Use Value: Fast response (<1 ps) and low capacitance (<100 pF at 0 V) avoid signal integrity degradation on 100 kHz PWM control lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70A-E3/52 | Commercial-grade (non-AEC-Q101), identical electrical specs and SMB package. | Lacks automotive qualification; not approved for under-hood or safety-critical modules. | Select when cost-sensitive industrial or consumer designs do not require automotive reliability validation. |
| SMCJ70A | Same VWM/VC but in larger SMC (DO-214AB) package; 1500 W PPPM, higher IPPM (12.3 A). | Requires larger PCB area; suited for higher-energy surge environments (e.g., outdoor telecom cabinets). | Choose when system-level surge testing exceeds 600 W requirements and board space permits SMC footprint. |
Compared with SMBJ70A-E3/52, SMBJ70HE3/52 adds AEC-Q101 qualification for automotive use without changing clamping performance; versus SMCJ70A, it trades peak power headroom for compact SMB layout - making SMBJ70HE3/52 optimal for space-constrained, automotive-qualified 48 V systems.
Availability
SMBJ70HE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ70HE3/52 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets high-volume, high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for robustness under harsh thermal and surge conditions while enabling automated manufacturing.
FAQ
What is the clamping voltage of SMBJ70HE3/52 at its rated peak pulse current?
The SMBJ70HE3/52 has a maximum clamping voltage (VC) of 113 V at 5.3 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured under defined test conditions per JEDEC standards and ensures protected circuits experience no more than 113 V during surge events. The SMBJ70HE3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C) due to its stable glass-passivated junction.
Is SMBJ70HE3/52 suitable for automotive applications?
Yes, SMBJ70HE3/52 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD verification required for automotive electronics. Its construction - including matte tin-plated leads, MSL Level 1 rating, and operation up to +150 °C junction temperature - makes SMBJ70HE3/52 appropriate for under-hood and chassis-mounted modules such as body control units and motor control ECUs.
How does the SMBJ70HE3/52 differ from the SMBJ70A-E3/52?
The SMBJ70HE3/52 and SMBJ70A-E3/52 share identical electrical characteristics (VWM = 70 V, VC = 113 V, PPPM = 600 W) and SMB (DO-214AA) packaging, but SMBJ70HE3/52 carries AEC-Q101 qualification while SMBJ70A-E3/52 is commercial-grade only. This distinction validates SMBJ70HE3/52 for automotive use cases where reliability certification is mandatory - a requirement not met by the non-HE3 variant despite identical surge performance.
What is the maximum reverse leakage current of SMBJ70HE3/52 at its working voltage?
At its rated stand-off voltage of 70 V and ambient temperature of 25 °C, the SMBJ70HE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss in standby mode and avoids false triggering in high-impedance sensing circuits. The SMBJ70HE3/52 maintains leakage below 10 µA even at elevated temperatures up to +125 °C, supporting stable operation in thermally demanding environments.
Can SMBJ70HE3/52 be used in bidirectional configurations?
No, SMBJ70HE3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMBJ70CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities. Using SMBJ70HE3/52 in reverse-biased configurations beyond its specified ratings risks permanent damage; always match device polarity to circuit topology - SMBJ70HE3/52 must be installed with cathode toward the protected line.
SMBJ70HE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 4.8A
- 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)
SMBJ70HE3/52 FAQ
1.How can I place an order for SMBJ70HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70HE3/52 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 SMBJ70HE3/52 reliable?
The price and inventory of SMBJ70HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ70HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70HE3/52?
SMBJ70HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70HE3/52 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 SMBJ70HE3/52?
For technical support, including SMBJ70HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70HE3/52 requirements.
6.How does Aetrix verify that SMBJ70HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ70HE3/52 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 SMBJ70HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ70HE3/52?
All SMBJ70HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70HE3/52, 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 SMBJ70HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ70HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70HE3/52 Tags
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