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Vishay General Semiconductor - Diodes Division SMBJ70AHE3/5B
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- Part No.:
- SMBJ70AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70AHE3/5B.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,407
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Product details
Overview
SMBJ70AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge 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 and telecom line cards.
For engineers reviewing the SMBJ70AHE3/5B datasheet, SMBJ70AHE3/5B pinout, SMBJ70AHE3/5B application, or SMBJ70AHE3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at 70 V), while the low RθJA of 100 °C/W supports thermal reliability under repetitive surge conditions.
The SMBJ70AHE3/5B is rated for 100 A non-repetitive forward surge current (IFSM) and exhibits a temperature coefficient of VBR of +0.105 %/°C - enabling predictable clamping behavior across -55 °C to +150 °C operating range. Its unidirectional configuration requires cathode-band orientation during PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 48 V DC bus protection. |
| VBR min/max | 77.8 V / 86.0 V at IT = 1 mA - verified breakdown range ensures consistent turn-on across production lots. |
| VC @ IPPM | 113 V at 5.3 A - clamping voltage limits downstream component stress during 10/1000 µs surges. |
| PPPM | 600 W - peak pulse power handling capability per standard 10/1000 µs waveform with 0.01 % duty cycle. |
| IFSM | 100 A - single half-sine surge rating (8.3 ms) supports robustness against inductive switching events. |
| TJ max | +150 °C - enables use in high-temperature environments such as enclosed industrial enclosures or near power converters. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 0.205" × 0.130" footprint and matte tin-plated leads compliant with J-STD-002. |
Pinout & Package
Package: SMB (DO-214AA), molded case with UL 94 V-0 flammability rating; cathode indicated by band marking on body; terminals are matte tin-plated for solderability per JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane; must be routed with minimal inductance for effective clamping. |
| Cathode | Protected line connection / surge input | Banded end connects to the line being protected (e.g., 48 V rail or RS-485 signal); polarity-critical for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood and infotainment power rails. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when mounted on recommended 0.2" × 0.2" copper pads. |
| Glass passivated junction | Ensures stable reverse leakage (<1.0 µA at VWM) and long-term parameter stability over temperature and time. |
| Low profile SMB package | 0.084" height enables use in space-constrained designs such as modular PLC I/O cards and PoE-powered devices. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60 % RH - eliminates bake requirements prior to reflow assembly. |
Applications
| Industrial Power Supply Protection | Telecom Line Card Surge Suppression |
|---|---|
|
Use Scenario: Protecting 48 V DC input stage of programmable logic controller (PLC) power modules against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before they reach DC-DC controllers and gate drivers. Use Value: Limits voltage excursion to ≤113 V during 600 W surges, preventing latch-up or permanent damage to 60 V-rated MOSFETs and regulators. |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs on telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential signal pairs and power rails to absorb common-mode transients before secondary protection stages. Use Value: Fast response (<1 ps) and low clamping voltage preserve signal integrity while meeting GR-1089-CORE Level 3 surge immunity requirements. |
| Automotive Body Control Module (BCM) | Consumer Sensor Interface Protection |
|
Use Scenario: Securing 12 V supply inputs of BCM microcontrollers and CAN transceivers against battery reverse polarity and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional clamping device installed at main power entry point, upstream of LDOs and reset supervisors. Use Value: AEC-Q101 qualification and 100 A IFSM rating ensure survivability during ISO 7637-2 Pulse 5a (load dump) events up to 35 V peak. |
Use Scenario: Shielding I²C and analog output lines of environmental sensors (e.g., temperature/humidity modules) in smart home hubs from ESD events. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal traces adjacent to connectors to suppress human-body-model (HBM) discharges without distorting data timing. Use Value: <1.0 µA leakage at 70 V prevents signal offset errors in precision analog front-ends while maintaining I²C rise-time compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70A-E3/5B | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and SMB package. | Not approved for automotive or safety-critical industrial systems requiring automotive qualification. | Select when cost sensitivity outweighs automotive reliability requirements and full AEC-Q101 traceability is not mandated. |
| SMCJ70AHE3/5B | Same VWM/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and higher IPPM (12.3 A). | Used where higher surge energy absorption is required, e.g., AC mains input stages or outdoor telecom cabinets. | Choose when system-level surge testing exceeds 600 W or when board layout allows larger footprint for enhanced thermal margin. |
Compared with SMBJ70A-E3/5B, the SMBJ70AHE3/5B adds AEC-Q101 qualification without altering clamping performance; versus SMCJ70AHE3/5B, it trades 2.5× lower surge capacity for 40 % smaller PCB area and tighter height constraints - making it optimal for compact, automotive-qualified DC-fed subsystems.
Availability
SMBJ70AHE3/5B is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control modules, and consumer sensor interfaces requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMBJ70AHE3/5B 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in space-constrained, high-reliability applications - targeting industrial automation, automotive electronics, and communications infrastructure where robustness and standardized SMT compatibility are critical.
FAQ
What is the clamping voltage of SMBJ70AHE3/5B at its rated peak pulse current?
The SMBJ70AHE3/5B has a maximum clamping voltage (VC) of 113 V at 5.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ70AHE3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), ensuring consistent protection in demanding thermal environments.
Is SMBJ70AHE3/5B suitable for automotive applications?
Yes, SMBJ70AHE3/5B is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness required for automotive electronic components. Its 150 °C maximum junction temperature, 100 A IFSM rating, and RoHS-compliant construction make SMBJ70AHE3/5B appropriate for under-hood and cabin applications such as body control modules, infotainment power rails, and ADAS sensor interfaces.
How does the SMBJ70AHE3/5B differ from bidirectional variants like SMBJ70CAHE3/5B?
The SMBJ70AHE3/5B is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMBJ70CAHE3/5B is bidirectional with no polarity marking and symmetric clamping in both directions. Electrically, SMBJ70AHE3/5B has a forward voltage drop (~3.5 V at 50 A) and is intended for DC line protection, while SMBJ70CAHE3/5B suits AC or differential signal lines. Their VBR, VC, and PPPM ratings are otherwise matched within tolerance.
What is the thermal resistance of SMBJ70AHE3/5B, and how does it affect layout?
The SMBJ70AHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes. To maintain safe junction temperatures during repetitive surges, designers should maximize copper area connected to both anode and cathode pads and avoid narrow traces. Use of inner-layer thermal vias improves heat dissipation and extends surge endurance.
Does SMBJ70AHE3/5B require special handling during reflow soldering?
No - SMBJ70AHE3/5B is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30 °C/60 % RH and withstands peak reflow temperatures up to 260 °C without preconditioning or baking. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, supporting reliable solder joint formation using standard lead-free reflow profiles. The device's glass passivation also prevents moisture-related degradation during thermal cycling.
SMBJ70AHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMBJ70AHE3/5B FAQ
1.How can I place an order for SMBJ70AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70AHE3/5B 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 SMBJ70AHE3/5B reliable?
The price and inventory of SMBJ70AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ70AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70AHE3/5B?
SMBJ70AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70AHE3/5B 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 SMBJ70AHE3/5B?
For technical support, including SMBJ70AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70AHE3/5B requirements.
6.How does Aetrix verify that SMBJ70AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ70AHE3/5B 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 SMBJ70AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ70AHE3/5B?
All SMBJ70AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70AHE3/5B, 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 SMBJ70AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ70AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70AHE3/5B Tags
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