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Vishay General Semiconductor - Diodes Division SMBJ70HE3/5B
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- Part No.:
- SMBJ70HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70HE3/5B.pdf
- Description:
- TVS DIODE 70VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,712
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Product details
Overview
SMBJ70HE3/5B 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 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 SMBJ70HE3/5B datasheet, SMBJ70HE3/5B pinout, SMBJ70HE3/5B application, or SMBJ70HE3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and RoHS-compliant packaging details for rapid ESD/surge protection design-in.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1 µA leakage at 70 V), then rapidly avalanches below 1 ns to limit transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
Rated for 600 W peak pulse power (10/1000 µs), it handles up to 5.3 A IPPM while maintaining clamping at ≤113 V. The device is qualified to AEC-Q101, enabling use in automotive ECUs and industrial controllers where reliability under repetitive surge stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 72 V nominal DC bus applications. |
| VBR min/max | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown range ensures predictable turn-on across process variation and temperature. |
| VC @ IPPM | 113 V at 5.3 A - Clamping voltage during 10/1000 µs surge; limits downstream IC stress to <115 V in 48–72 V systems. |
| PPPM | 600 W - Peak pulse power handling per single transient; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly mounted. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; enables thermal design with ≤5 W steady-state dissipation. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive or enclosed industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 molding compound. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients on cathode side. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 70 V rail); avalanche conduction occurs from cathode to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive power interfaces. |
| AEC-Q101 qualification | Validates long-term reliability in automotive control modules, including thermal cycling, humidity, and surge endurance. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) across −55 °C to +150 °C operating range. |
| Low profile SMB package | 0.220" × 0.155" footprint supports high-density PCB layouts and automated SMT assembly without height interference. |
| RoHS-compliant & halogen-free option | Base P/N HE3 denotes RoHS-compliant and AEC-Q101 qualified; meets environmental compliance for global OEM programs. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and MCU I/O against inductive kickback from 24–72 V DC motor switching. IC Role / Device Role / Timing Role: Shunt clamping element placed between high-side MOSFET source and ground, triggered within <1 ns to clamp spikes to ≤113 V. Use Value: Prevents latch-up or permanent damage to 100 V-rated gate drivers and 5 V logic interfaces during 100 A+ load dump events. |
Use Scenario: Surge suppression on LIN bus and sensor supply lines in door module ECUs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Unidirectional TVS connected between 12 V supply rail and chassis ground, absorbing 4 kV IEC 61000-4-5 transients. Use Value: Maintains system uptime by limiting rail collapse to <113 V during 10/1000 µs surges, preserving CAN/LIN communication integrity. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection for 48 V PoE-powered equipment subjected to lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping device on DC input after bridge rectifier, conducting only during >77.8 V transients. Use Value: Limits energy delivered to downstream DC/DC converters to <600 W per event, preventing transformer saturation and MOSFET failure. |
Use Scenario: Overvoltage safeguard on microcontroller VDD rails in washing machine main boards exposed to relay coil back-EMF. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) standby protector tied between 5 V regulator output and ground. Use Value: Eliminates need for external crowbar circuits by clamping 100 V transients to 113 V with sub-nanosecond response. |
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-E3/5B | No AEC-Q101 qualification; commercial-grade only; identical VWM, VBR, and VC specs. | Suitable for non-automotive industrial or consumer designs where automotive reliability validation is not required. | Select when cost sensitivity outweighs AEC-Q101 requirement and full automotive qualification is unnecessary. |
| SMCJ70AHE3/5B | Higher 1500 W PPPM; larger SMC (DO-214AB) package; same VWM/VBR but 100 V VC at 15 A. | Better suited for higher-energy surges (e.g., 6 kV IEC 61000-4-5) where PCB space permits larger footprint. | Choose when system-level surge test levels exceed 4 kV and board layout accommodates 27% larger package area. |
Compared with SMBJ70A-E3/5B, SMBJ70HE3/5B adds AEC-Q101 qualification without sacrificing electrical performance; versus SMCJ70AHE3/5B, it trades peak power headroom for compact SMB footprint and lower thermal mass - ideal for space-constrained automotive modules requiring validated reliability.
Availability
SMBJ70HE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer appliance control boards requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMBJ70HE3/5B 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, TVS devices, and optoelectronics with emphasis on high-reliability, high-efficiency solutions.
The SMBJ series targets robust transient protection in automotive, industrial, and telecom systems - engineered for fast response, stable clamping, and qualification to AEC-Q101 and IEC standards.
FAQ
What is the maximum clamping voltage of SMBJ70HE3/5B at its rated peak pulse current?
The SMBJ70HE3/5B has a maximum clamping voltage (VC) of 113 V at 5.3 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that downstream circuitry sees no more than 113 V during a defined surge event - a critical parameter for protecting 100 V-rated MOSFETs and 5 V logic interfaces. The SMBJ70HE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ70HE3/5B qualified for automotive applications?
Yes, SMBJ70HE3/5B is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88392 (Revision 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and surge endurance - making SMBJ70HE3/5B suitable for under-hood and body-control applications. The SMBJ70HE3/5B meets automotive reliability requirements without requiring additional qualification by the end user.
What is the standoff voltage and breakdown range for SMBJ70HE3/5B?
The SMBJ70HE3/5B has a reverse stand-off voltage (VWM) of 70 V and a minimum/maximum breakdown voltage (VBR) of 77.8 V / 86.0 V at 1 mA test current. This 70 V rating ensures reliable blocking of normal operating voltages while allowing controlled avalanche onset above 77.8 V - essential for protecting 72 V battery systems and 48 V PoE infrastructure. The SMBJ70HE3/5B's tight VBR tolerance supports consistent protection margins across production lots.
Does SMBJ70HE3/5B have a bidirectional variant?
No, SMBJ70HE3/5B is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SMBJ70CA), which provide symmetrical clamping for AC-coupled or floating signal lines. The SMBJ70HE3/5B is optimized for DC rail protection where polarity is fixed - such as 70 V supply inputs or grounded-signal paths - and must be oriented with cathode toward the protected line.
What package type and mounting specifications apply to SMBJ70HE3/5B?
SMBJ70HE3/5B uses the SMB (DO-214AA) surface-mount package: 0.220" × 0.155" footprint, 0.096" height, matte tin-plated leads, and UL 94 V-0 compliant molding compound. It is rated MSL Level 1 with 260 °C peak reflow temperature and designed for soldering per J-STD-002 and JESD 22-B102. The SMBJ70HE3/5B requires 0.2" × 0.2" copper pads per terminal for optimal thermal and surge performance as specified in Vishay's recommended layout.
SMBJ70HE3/5B 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)
SMBJ70HE3/5B FAQ
1.How can I place an order for SMBJ70HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70HE3/5B 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 SMBJ70HE3/5B reliable?
The price and inventory of SMBJ70HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ70HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70HE3/5B?
SMBJ70HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70HE3/5B 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 SMBJ70HE3/5B?
For technical support, including SMBJ70HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70HE3/5B requirements.
6.How does Aetrix verify that SMBJ70HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ70HE3/5B 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 SMBJ70HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ70HE3/5B?
All SMBJ70HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70HE3/5B, 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 SMBJ70HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ70HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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