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Vishay General Semiconductor - Diodes Division SMBJ70AHE3_B/I
- Part No.:
- SMBJ70AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70AHE3_B/I.pdf
- Description:
- 600W,70V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,287
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Product details
Overview
SMBJ70AHE3_B/I 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/I datasheet, SMBJ70AHE3_B/I pinout, SMBJ70AHE3_B/I application, or SMBJ70AHE3_B/I equivalent, this part delivers AEC-Q101 qualification, low incremental surge resistance, fast sub-nanosecond response time, and compatibility with automated SMT assembly on standard PCB pad layouts per JEDEC DO-214AA footprint.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 70 V), then rapidly avalanches to limit transient overvoltages above its breakdown threshold. 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 ANSI/IEEE C62.35 surge standards and meets MSL Level 1 per J-STD-020 (peak reflow ≤260 °C). Its 100 °C/W junction-to-ambient thermal resistance requires appropriate copper pad area (0.2" × 0.2") for full 600 W pulse handling without derating at TA = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 70 V - Maximum continuous reverse working voltage before significant leakage; defines safe DC rail operating margin. |
| VBR (Breakdown Voltage) | 77.8–86.0 V at 1 mA - Tight 5% tolerance ensures predictable turn-on during transients; critical for system-level ESD/surge immunity design. |
| VC (Clamping Voltage) | 113 V at 5.3 A (10/1000 µs) - Limits voltage seen by protected ICs/MOSFETs; enables downstream component survival under IEC 61000-4-5 Level 4 surges. |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2/5a) without failure when mounted on recommended 5 mm × 5 mm copper pads. |
| IPPM (Peak Pulse Current) | 5.3 A - Peak surge current capability at rated clamping voltage; determines minimum trace width and fuse coordination. |
| TJmax | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing; supports PPAP documentation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-banded unidirectional configuration. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; forms shunt path during overvoltage events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 70 V supply rail); polarity band identifies this terminal on PCB marking. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly laid out PCBs with 5 mm × 5 mm pads. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails requiring zero-defect reliability. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream MOSFETs or LDOs; improves system-level surge margin versus higher-ratio TVS devices. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; reduces manufacturing overhead in high-volume SMT lines. |
| Glass-passivated junction | Ensures stable leakage current (<1 µA at 70 V) and minimal VBR drift over 1000+ thermal cycles. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 70 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role: Shunt-type transient suppressor placed between VBAT and chassis ground. Use Value: Clamps transients to ≤113 V, preventing damage to 80 V-rated power management ICs and microcontrollers. |
Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) in PLC I/O modules exposed to field wiring surges. IC Role / Device Role: Low-capacitance (<50 pF) unidirectional clamp on 24 V signal lines. Use Value: Maintains signal integrity while suppressing ±1 kV EFT bursts per IEC 61000-4-4 without loading the sensor output. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
|
Use Scenario: Guarding 48 V PoE-powered equipment front-end against lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role: Primary-stage TVS on DC input before DC-DC converter. Use Value: Absorbs 600 W surge energy without degradation, enabling single-stage protection architecture and reducing BOM count. |
Use Scenario: Overvoltage safeguard on 5–20 V USB-C PD or barrel jack inputs in portable medical monitors and smart home hubs. IC Role / Device Role: Unidirectional clamp referenced to system ground, placed upstream of input fuse and filter. Use Value: Prevents latch-up or gate oxide rupture in USB controller ICs during accidental 24 V adapter misconnection. |
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/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free materials are mandated by OEM environmental policy. | Choose SMBJ70AHM3_B/I if compliance with IPC-1752A Class 2 or EU Directive 2015/863 is required. |
| SMCJ70AHE3_A/H | Higher-power 1500 W version in larger SMC (DO-214AB) package; same VWM/VBR/VC but 12.5 A IPPM. | Used where higher surge repetition rate or longer pulse duration (e.g., ISO 16750-2) demands greater energy absorption. | Choose SMCJ70AHE3_A/H only if board space allows SMC footprint and system-level testing confirms need for >600 W rating. |
Compared with SMBJ70AHE3_B/I, the HM3 variant offers identical protection performance with halogen-free construction, while the SMCJ70AHE3_A/H provides 2.5× higher pulse energy capacity at the cost of larger footprint and higher thermal mass - selection depends strictly on mechanical constraints and validated surge test requirements.
Availability
SMBJ70AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with AEC-Q101 validation and full traceability.
Supply support for SMBJ70AHE3_B/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, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-reliability transient suppression in space-constrained, high-surge environments - targeting automotive, industrial, and communications markets where consistent clamping and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ70AHE3_B/I at its rated peak pulse current?
The SMBJ70AHE3_B/I has a maximum clamping voltage (VC) of 113 V when subjected to its rated 5.3 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected downstream components such as 80 V-rated power ICs. The SMBJ70AHE3_B/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ70AHE3_B/I suitable for automotive applications?
Yes, SMBJ70AHE3_B/I is AEC-Q101 qualified and specifically designed for automotive use cases including engine control units, body electronics, and ADAS power rails. Its HE3 suffix denotes RoHS-compliant, AEC-Q101-qualified construction, validated for HTOL, temperature cycling, and ESD robustness. The SMBJ70AHE3_B/I meets ISO 7637-2 Pulse 1, 2a, 3a/b, and 5a requirements when implemented with proper PCB layout - confirming its suitability for under-hood and cabin-mounted automotive systems.
What is the standoff voltage (VWM) and why is it critical for SMBJ70AHE3_B/I selection?
The standoff voltage (VWM) of SMBJ70AHE3_B/I is 70 V - the maximum continuous reverse voltage the device can withstand without entering avalanche conduction. This parameter is critical because it must exceed the normal operating voltage of the protected circuit (e.g., a 60 V nominal battery rail) while maintaining sufficient margin to avoid leakage-induced power loss or thermal stress. Selecting SMBJ70AHE3_B/I for a 70 V system ensures reliable blocking during steady-state operation and precise triggering only during actual overvoltage events.
How does the SMBJ70AHE3_B/I package compare to other TVS footprints like SMA or SMC?
SMBJ70AHE3_B/I uses the SMB (DO-214AA) package - measuring 4.57 mm × 3.94 mm - which offers 30% smaller footprint than SMC (DO-214AB) and 25% larger than SMA (DO-214AC), striking a balance between surge capability and board space. Unlike SMA, SMB supports 600 W pulse power without derating on standard pads; unlike SMC, it fits dense automotive and telecom PCBs. The SMBJ70AHE3_B/I's DO-214AA outline is JEDEC-standardized, ensuring compatibility with automated pick-and-place and reflow profiles across contract manufacturers.
Does SMBJ70AHE3_B/I have bidirectional capability?
No, SMBJ70AHE3_B/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only during positive transients on its cathode terminal relative to anode (i.e., protects against overvoltage on a positive rail referenced to ground). For bidirectional protection (e.g., AC lines or differential data buses), the SMBJ70CA variant would be required. Using SMBJ70AHE3_B/I in bidirectional applications risks failure during negative excursions, as it lacks symmetrical breakdown characteristics.
SMBJ70AHE3_B/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:
- 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/I FAQ
1.How can I place an order for SMBJ70AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70AHE3_B/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_B/I reliable?
The price and inventory of SMBJ70AHE3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ70AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70AHE3_B/I?
SMBJ70AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70AHE3_B/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_B/I?
For technical support, including SMBJ70AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ70AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ70AHE3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ70AHE3_B/I?
All SMBJ70AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70AHE3_B/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_B/I part is unused and in its original packaging.
Return procedure for SMBJ70AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70AHE3_B/I Tags
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