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Vishay General Semiconductor - Diodes Division SMBJ70AHE3_A/I
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- Part No.:
- SMBJ70AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70AHE3_A/I.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,383
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Product details
Overview
SMBJ70AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. 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 - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ70AHE3_A/I datasheet, SMBJ70AHE3_A/I pinout, SMBJ70AHE3_A/I application, or SMBJ70AHE3_A/I equivalent, this device is selected for robust ESD and surge protection where low clamping voltage, AEC-Q101 qualification, and stable thermal performance up to 150 °C junction temperature are required in automotive and industrial designs.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, responding within <1 ps to fast-rising transients. Its glass-passivated junction ensures stable leakage (<1 µA at 70 V) and repeatable breakdown behavior under repetitive surge conditions.
Thermal design relies on its RθJA of 100 °C/W and RθJL of 20 °C/W, with derating applied above 25 °C ambient per Figure 2. The cathode band marking enables unambiguous polarity identification during automated placement on PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 113 V at 5.3 A - Clamped voltage during 600 W transient; determines worst-case overvoltage seen by downstream components. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity testing. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against inrush or fault currents. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with J-STD-020 MSL level 1 reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge events (e.g., reverse-bias faults). |
| Cathode | Clamping terminal (marked with band) | Connected to higher-potential side; avalanche breakdown occurs here to shunt transient energy to ground or rail. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (e.g., 4 kV line-to-ground) without degradation when properly mounted. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs - critical for 75 V-rated MOSFETs and 3.3 V/5 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; supports high-yield automated assembly in volume production. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage current across temperature and lifetime cycling. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V power inputs in automotive ECUs from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy to ground during >100 V spikes lasting up to 400 ms. Use Value: Limits voltage to ≤113 V during 5.3 A surge, preventing damage to upstream DC-DC controllers and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Fast-response avalanche diode placed at connector entry point to divert sub-nanosecond ESD strikes. Use Value: Sub-1 ps response and <1 µA leakage at 70 V preserve signal integrity while meeting IEC 61000-4-2 Level 4 (15 kV air). |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Stage |
|
Use Scenario: Secondary-side overvoltage suppression on PoE-powered line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on 48 V bias rails, activated only during transients exceeding 70 V. Use Value: 113 V clamping prevents latch-up in Ethernet PHYs and maintains compliance with GR-1089-CORE surge immunity. |
Use Scenario: Input-stage transient protection in universal-input AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Primary-side unidirectional clamp on bulk capacitor node to absorb switching noise and line surges. Use Value: 600 W rating handles EN 61000-4-5 indirect lightning surges; RoHS-compliant HE3 suffix meets global regulatory 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 |
|---|---|---|---|
| SMBJ70AHM3_A/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and thermal resistance. | Required where halogen-free compliance (IEC 61249-2-21) is mandated in final product bill-of-materials. | Select SMBJ70AHM3_A/I when environmental compliance exceeds standard RoHS requirements. |
| SMBJ70A-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, but rated for -55 °C to +150 °C with no automotive qualification testing. | Suitable for cost-sensitive consumer or industrial applications without automotive reliability mandates. | Choose SMBJ70A-E3/52 for non-automotive designs where AEC-Q101 is not required and tape-and-reel delivery matches production needs. |
Compared with SMBJ70AHE3_A/I, SMBJ70AHM3_A/I adds halogen-free compliance without trade-offs in surge capability or thermal performance, while SMBJ70A-E3/52 offers identical clamping behavior at lower qualification cost - enabling tiered sourcing based on end-equipment requirements.
Availability
SMBJ70AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and consumer power adapters requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMBJ70AHE3_A/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 systems where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ70AHE3_A/I at its rated peak pulse current?
The SMBJ70AHE3_A/I has a maximum clamping voltage (VC) of 113 V at its specified peak pulse current (IPPM) of 5.3 A, measured using the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2.
Is SMBJ70AHE3_A/I qualified for automotive applications?
Yes, SMBJ70AHE3_A/I is AEC-Q101 qualified, as indicated by the "HE3" suffix per Vishay's ordering nomenclature. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD - making SMBJ70AHE3_A/I suitable for under-hood and chassis-mounted automotive modules.
What does the "A/I" suffix mean in SMBJ70AHE3_A/I?
In SMBJ70AHE3_A/I, "A" denotes the revision code per Vishay's internal documentation, and "I" specifies the packaging format: 13-inch diameter plastic tape and reel with 3200 units per reel. This matches the ordering information table on page 3 of the SMBJ5.0A–SMBJ188A datasheet (Doc. #88392).
How does SMBJ70AHE3_A/I differ from bidirectional variants like SMBJ70CA?
SMBJ70AHE3_A/I is unidirectional and features a cathode band for polarity identification, while SMBJ70CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The unidirectional SMBJ70AHE3_A/I provides lower leakage and tighter VBR tolerance in DC-biased applications such as power rail protection.
What is the thermal resistance from junction to ambient for SMBJ70AHE3_A/I?
The typical thermal resistance from junction to ambient (RθJA) for SMBJ70AHE3_A/I is 100 °C/W, measured on the recommended 0.2" × 0.2" copper pad layout per datasheet page 3. This value assumes standard PCB mounting and guides thermal derating above 25 °C ambient temperature.
SMBJ70AHE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- 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)
SMBJ70AHE3_A/I FAQ
1.How can I place an order for SMBJ70AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70AHE3_A/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 SMBJ70AHE3_A/I reliable?
The price and inventory of SMBJ70AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ70AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70AHE3_A/I?
SMBJ70AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70AHE3_A/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 SMBJ70AHE3_A/I?
For technical support, including SMBJ70AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70AHE3_A/I requirements.
6.How does Aetrix verify that SMBJ70AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ70AHE3_A/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 SMBJ70AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ70AHE3_A/I?
All SMBJ70AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70AHE3_A/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 SMBJ70AHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ70AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70AHE3_A/I Tags
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