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Vishay General Semiconductor - Diodes Division SMBJ70AHE3_B/H
- Part No.:
- SMBJ70AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70AHE3_B/H.pdf
- Description:
- 600W,70V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,558
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Product details
Overview
SMBJ70AHE3_B/H 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 DC power rails 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 a 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the SMBJ70AHE3_B/H datasheet, SMBJ70AHE3_B/H pinout, SMBJ70AHE3_B/H application, or SMBJ70AHE3_B/H 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 packaging details for reliable circuit protection design and BOM validation.
Technical Context
This unidirectional TVS diode operates as a clamping device that remains non-conductive below its 70 V stand-off voltage and rapidly transitions to low-impedance conduction when transient voltages exceed its 77.8–86.0 V breakdown threshold. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and repeatable surge response across temperature.
The device sustains 600 W peak pulse power per 10/1000 µs waveform with <0.5 ns response time and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients on 24 V and 48 V systems. Its AEC-Q101 qualification confirms suitability for automotive under-hood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V/48 V systems. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 113 V at 5.3 A - Clamping voltage limiting downstream component stress during 600 W surge events. |
| PPPM | 600 W - Peak pulse power handling capability with 10/1000 µs waveform, supporting IEC 61000-4-5 Level 3/4 compliance. |
| IPPM | 5.3 A - Peak pulse current corresponding to VC; used to size series impedance and verify PCB trace current capacity. |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or lowest potential node; forms clamping path with cathode during positive transients. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V rail); conducts surge current to ground when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 4 kV surge events on 24 V supply lines without external current limiting. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for ECU and ADAS power stages. |
| Glass passivated junction | Ensures stable reverse leakage (<1.0 µA at 70 V) and consistent VBR over 10+ year field life in humid industrial environments. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients, protecting sensitive 75 V-rated MOSFETs and CAN transceivers. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination risks. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting 24 V battery-supplied microcontroller power inputs in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VIN and GND, activated within <0.5 ns of overvoltage onset. Use Value: Limits transient voltage to ≤113 V, preventing damage to 3.3 V/5 V LDOs and MCU internal regulators during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding 24 V digital input channels on programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Standoff-mode protector on each optocoupler input line, conducting only during >77.8 V transients. Use Value: Maintains <1.0 µA leakage at 24 V, preserving input logic thresholds while clamping 1 kV/500 A surges to safe levels for upstream isolation components. |
| Telecom DC Power Feeding Protection | Motor Drive Gate Driver Supply Clamp |
|
Use Scenario: Safeguarding 48 V PoE-powered base station RF modules from lightning-induced common-mode surges on DC feed lines. IC Role / Device Role / Timing Role: Primary unidirectional clamp on the DC input rail upstream of DC/DC converters and LNB bias circuits. Use Value: Absorbs 600 W surges without degradation, meeting GR-1089-CORE Level 3 immunity requirements for outdoor telecom equipment. |
Use Scenario: Protecting isolated gate driver ICs (e.g., Si823x) supplied from 15 V auxiliary rails in BLDC motor inverters. IC Role / Device Role / Timing Role: Fast-response clamp on gate driver VDD rail, triggered by Miller-induced voltage spikes during high-dI/dt switching. Use Value: Clamps 15 V rail transients to ≤113 V within nanoseconds, preventing false turn-on and gate oxide overstress in 600 V SiC MOSFETs. |
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_B/H | Halogen-free variant with identical electrical specs, same AEC-Q101 qualification, and MSL Level 1 rating. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policies. | Direct material substitution when RoHS + halogen-free certification is required without changing layout or test plans. |
| SMCJ70AHE3_A/H | Same VWM/VBR/VC but in larger SMC (DO-214AB) package; 1500 W PPPM, RθJA = 50 °C/W. | Higher power handling and better thermal dissipation, suited for higher-energy surge environments (e.g., EV charging stations). | Choose when system-level surge testing exceeds 600 W or board space allows larger footprint for improved long-term reliability. |
Compared with SMBJ70AHE3_B/H, SMBJ70AHM3_B/H offers identical protection performance with halogen-free construction, while SMCJ70AHE3_A/H provides 2.5× higher surge power capacity in a larger package - enabling trade-offs between board area, environmental compliance, and energy absorption headroom.
Availability
SMBJ70AHE3_B/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power feeding systems requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBJ70AHE3_B/H 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMBJ series was developed specifically for high-reliability transient suppression in space-constrained, high-surge environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and stable clamping performance.
FAQ
What is the maximum clamping voltage of SMBJ70AHE3_B/H at its rated peak pulse current?
The SMBJ70AHE3_B/H 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 full-power transient event and is critical for verifying compatibility with downstream component voltage ratings. The SMBJ70AHE3_B/H maintains this clamping performance across its operational temperature range of –55 °C to +150 °C.
Is SMBJ70AHE3_B/H qualified for automotive applications?
Yes, SMBJ70AHE3_B/H is AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 09-Jan-2024 (Document Number: 88392). This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - validating its use in automotive powertrain, body electronics, and ADAS modules. The "HE3" suffix explicitly denotes AEC-Q101 compliance, distinguishing it from commercial-grade variants.
What does the "B/H" suffix in SMBJ70AHE3_B/H indicate?
The "B/H" suffix in SMBJ70AHE3_B/H specifies the packaging configuration: "B" denotes the tape-and-reel orientation (standard embossed carrier tape), and "H" indicates the 7-inch reel size containing 750 units. This ordering code aligns with Vishay's preferred package code H in the Ordering Information table (page 3 of document 88392), confirming compatibility with automated SMT placement equipment calibrated for 7" reels and standard pitch.
How does SMBJ70AHE3_B/H compare to bidirectional TVS diodes like SMBJ70CAHE3_B/H?
SMBJ70AHE3_B/H is unidirectional and intended for DC rail protection where polarity is fixed, offering lower leakage (<1.0 µA at 70 V) and no reverse conduction path. In contrast, SMBJ70CAHE3_B/H is bidirectional with symmetrical clamping in both directions - suitable for AC lines or differential signals but exhibiting higher leakage at stand-off. The SMBJ70AHE3_B/H cannot replace SMBJ70CAHE3_B/H in AC-coupled applications due to its inherent polarity dependence and lack of reverse breakdown capability.
What is the thermal resistance and recommended pad layout for SMBJ70AHE3_B/H?
The SMBJ70AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in Figure 6 of the Vishay datasheet. This pad layout is essential to achieve rated power dissipation and prevent thermal runaway during repetitive surge events. Deviating from this layout increases RθJA and reduces sustainable pulse repetition rate.
SMBJ70AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ70AHE3_B/H FAQ
1.How can I place an order for SMBJ70AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70AHE3_B/H 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_B/H reliable?
The price and inventory of SMBJ70AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ70AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70AHE3_B/H?
SMBJ70AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70AHE3_B/H 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_B/H?
For technical support, including SMBJ70AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ70AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ70AHE3_B/H 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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ70AHE3_B/H?
All SMBJ70AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70AHE3_B/H, 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_B/H part is unused and in its original packaging.
Return procedure for SMBJ70AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70AHE3_B/H Tags
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