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Vishay General Semiconductor - Diodes Division SMBG70AHE3/5B
- Part No.:
- SMBG70AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG70AHE3/5B.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,578
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Product details
Overview
SMBG70AHE3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 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.
For engineers reviewing the SMBG70AHE3/5B datasheet, SMBG70AHE3/5B pinout, SMBG70AHE3/5B application, or SMBG70AHE3/5B equivalent, key selection criteria include clamping performance under automotive load-dump transients, AEC-Q101 qualification for automotive-grade reliability, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional shunt protector, conducting only when reverse voltage exceeds VBR to clamp transient energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 μA at 70 V) and fast response time (<1 ns), critical for protecting MOSFET gates and microcontroller I/O pins against ESD and inductive switching spikes.
The device is rated for 150 °C maximum junction temperature and exhibits 100 °C/W typical thermal resistance (junction-to-ambient) on standard PCB pads. Its 100 A non-repetitive forward surge capability (8.3 ms half-sine) supports high-energy automotive ISO 7637-2 pulse 5a/b suppression without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected line voltage. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown range ensures reliable triggering above normal operating margin. |
| VC @ IPPM | 113 V at 5.3 A - Clamping voltage during 10/1000 μs surge defines worst-case stress on protected ICs. |
| PPPM | 600 W - Peak pulse power handling capacity determines survivability against standardized lightning/surge events. |
| IFSM | 100 A - Single half-sine surge rating validates suitability for automotive load-dump protection per ISO 16750-2. |
| TJ max | 150 °C - Enables operation in under-hood automotive environments without derating. |
| AEC-Q101 | Qualified - Confirms reliability for automotive electronic control units (ECUs), including temperature cycling and HTRB testing. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes shunt path during overvoltage event. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 12 V rail); reverse-biased during normal operation, avalanches during transients. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 12 V systems. |
| AEC-Q101 qualification | Validates long-term reliability in automotive ECUs subject to thermal cycling, humidity, and vibration stress. |
| 100 °C/W RθJA | Allows thermal design using standard 5 mm × 5 mm copper pads-no heatsink required for intermittent surge duty. |
| Glass passivated junction | Ensures stable VBR and low leakage (<1.0 μA) across temperature and lifetime, critical for battery-powered sensors. |
| MSL Level 1 | Permits unlimited floor life and reflow at 260 °C peak, compatible with standard lead-free assembly processes. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs of engine control modules (ECMs) against ISO 7637-2 pulse 5a (load dump). IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and ground, clamping transients within 1 ns to limit voltage to ≤113 V. Use Value: Prevents latch-up or gate oxide damage in MCU power management ICs during alternator field decay events. | Use Scenario: Safeguarding analog outputs of pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to absorb inductive kickback from solenoid drivers sharing same backplane. Use Value: Maintains signal integrity below 113 V clamping threshold, avoiding ADC saturation or op-amp input stage damage. |
| Telecom DC Power Input Protection | Consumer USB-C Power Delivery Line Protection |
Use Scenario: Securing 48 V DC input of PoE-powered network switches against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary shunt protector on DC input rail upstream of DC-DC converters, triggered by >77.8 V transients. Use Value: Limits surge energy dissipation to 600 W per event, enabling compact layout without external spark gaps or varistors. | Use Scenario: Protecting VBUS line in USB-C receptacles against ESD and hot-plug transients during 20 V PD negotiation. IC Role / Device Role / Timing Role: Fast-response TVS placed between VBUS and GND, leveraging <1 ns response to suppress ±15 kV contact ESD per IEC 61000-4-2. Use Value: Clamps ESD pulses to ≤113 V before they reach USB PD controller, preserving communication handshake integrity. |
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 | Same VWM (70 V), lower PPPM (600 W → 600 W), identical SMB package but SMBJ has slightly higher VC (115 V vs. 113 V). | Not AEC-Q101 qualified; intended for industrial/commercial use only. | Select SMBG70AHE3/5B for automotive designs requiring AEC-Q101; SMBJ70A-E3/5B suffices for non-automotive cost-sensitive applications. |
| 1.5SMC70AHE3/A | Same VWM and VC, but larger SMC (DO-214AB) package (4.5 mm × 3.9 mm vs. SMBG's 4.57 mm × 3.94 mm); 100 A IFSM unchanged. | Higher thermal mass allows longer surge duration handling but requires larger PCB area. | Choose SMBG70AHE3/5B for space-constrained automotive modules; 1.5SMC70AHE3/A where board real estate permits and higher thermal inertia is beneficial. |
Compared with SMBJ70A-E3/5B and 1.5SMC70AHE3/A, SMBG70AHE3/5B uniquely combines AEC-Q101 qualification, SMBG footprint efficiency, and 113 V clamping-making it optimal for automotive body electronics where reliability, size, and precise voltage limiting are jointly critical.
Availability
SMBG70AHE3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power supplies, and consumer USB-C PD designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG70AHE3/5B 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, and protection devices with emphasis on high-reliability, automotive-qualified components.
The SMBG series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, balancing low clamping voltage, fast response, and robust surge handling in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of SMBG70AHE3/5B at its rated peak pulse current?
The SMBG70AHE3/5B has a maximum clamping voltage (VC) of 113 V at 5.3 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2. The SMBG70AHE3/5B maintains this clamping performance across its operational temperature range.
Is SMBG70AHE3/5B qualified for automotive applications?
Yes, SMBG70AHE3/5B is explicitly AEC-Q101 qualified, as stated in the Vishay datasheet (page 1, "MECHANICAL DATA" section and page 3, "RATINGS AND CHARACTERISTICS CURVES" note). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing-making SMBG70AHE3/5B suitable for under-hood and chassis-mounted automotive electronics.
What does the "HE3" suffix indicate in SMBG70AHE3/5B?
The "HE3" suffix in SMBG70AHE3/5B denotes RoHS-compliant construction with AEC-Q101 qualification (per Vishay's ordering nomenclature on page 3 of the datasheet). It distinguishes this variant from industrial-grade "E3" parts and halogen-free "HM3" variants. The "5B" indicates packaging in 13-inch tape-and-reel format with 3200 units per reel.
Can SMBG70AHE3/5B be used in bidirectional configurations?
No, SMBG70AHE3/5B is a unidirectional TVS diode, as confirmed by its part number ending in "A" (not "CA") and its specified polarity (cathode band marked). Bidirectional operation requires CA-suffix parts like SMBG70CA. Using SMBG70AHE3/5B in bidirectional circuits would result in forward conduction during negative transients, potentially damaging the device or failing to protect.
What is the thermal resistance of SMBG70AHE3/5B, and how does it affect PCB layout?
The SMBG70AHE3/5B 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 (datasheet page 3). This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA, improving surge endurance. For repeated surge events, designers should verify junction temperature rise using this RθJA and the SMBG70AHE3/5B's power dissipation profile.
SMBG70AHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG70AHE3/5B FAQ
1.How can I place an order for SMBG70AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG70AHE3/5B 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 SMBG70AHE3/5B reliable?
The price and inventory of SMBG70AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG70AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG70AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG70AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG70AHE3/5B?
SMBG70AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG70AHE3/5B 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 SMBG70AHE3/5B?
For technical support, including SMBG70AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG70AHE3/5B requirements.
6.How does Aetrix verify that SMBG70AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG70AHE3/5B 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 SMBG70AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG70AHE3/5B?
All SMBG70AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG70AHE3/5B, 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 SMBG70AHE3/5B part is unused and in its original packaging.
Return procedure for SMBG70AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG70AHE3/5B Tags
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