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Vishay General Semiconductor - Diodes Division SMBJ8.0HE3/5B
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- Part No.:
- SMBJ8.0HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0HE3/5B.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,288
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Product details
Overview
SMBJ8.0HE3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 10 mA, and clamps transients to ≤13.6 V at 44.1 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed on power rails and signal lines of industrial sensors and automotive ECUs.
For engineers reviewing the SMBJ8.0HE3/5B datasheet, SMBJ8.0HE3/5B pinout, SMBJ8.0HE3/5B application, or SMBJ8.0HE3/5B equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), clamping performance, and real-world use context for surge protection design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging glass-passivated junction technology for stable reverse-biased transient suppression. Its 600 W peak pulse power rating (10/1000 µs) and low incremental surge resistance enable fast response (<1 ns) to ESD and inductive switching spikes without latch-up or degradation.
Rated for -55 °C to +150 °C operating junction temperature, SMBJ8.0HE3/5B meets MSL Level 1 per J-STD-020 and supports reflow soldering up to 260 °C peak. The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification - critical for automotive powertrain and body control modules requiring long-term reliability under thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 8.0 V - maximum continuous reverse voltage before clamping begins; sets safe operating margin above nominal 5–7 V supply rails. |
| VBR (Breakdown) | 8.89–9.83 V at 10 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | ≤13.6 V at IPPM = 44.1 A - limits downstream IC stress during 600 W surge; enables protection of 12 V logic interfaces. |
| IPPM | 44.1 A (10/1000 µs) - peak surge current handling capacity; sufficient for ISO 7637-2 Pulse 1/2a/5a automotive transients. |
| PPPM | 600 W - peak pulse power dissipation capability; defines energy absorption limit for repetitive surge events at 0.01% duty cycle. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs PCB thermal layout requirements. |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Cathode indicated by band; anode is unmarked end. Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., 12 V rail); conducts surge current to ground when VLINE exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces - supports 15-year lifecycle reliability. |
| 600 W peak pulse power | Handles high-energy transients from inductive load switching (e.g., fuel injectors, relays) without failure or parameter shift. |
| Fast response time (<1 ns) | Clamps voltage spikes before they propagate to downstream ICs - protects microcontrollers, CAN transceivers, and analog front-ends. |
| Low clamping ratio (VC/VWM ≈ 1.7) | Minimizes overvoltage stress on protected circuitry - enables compatibility with 12 V tolerant I/O and 5 V logic families. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow processing without baking - simplifies SMT manufacturing and reduces yield risk. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protecting 12 V power inputs to body control modules against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused battery feed and LDO input. Use Value: Limits transient voltage to ≤13.6 V, preventing LDO overvoltage shutdown and MCU brownout during 35 V/100 ms surges. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLCs from EMI-induced coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting sensor output to ground, preserving signal integrity up to 1 MHz. Use Value: Clamps 4 kV ESD (IEC 61000-4-2) and 1 kV burst noise (IEC 61000-4-4) without distorting mV-level sensor signals. |
| Consumer Power Adapter Inputs | Telecom DC Power Feeds |
|
Use Scenario: Safeguarding AC/DC adapter secondary-side rectifier outputs against lightning-induced surges on mains-connected devices. IC Role / Device Role / Timing Role: Primary overvoltage clamp on +5 V or +12 V DC output rail before USB-PD controller or charging IC. Use Value: Absorbs 600 W surge energy while maintaining <1 µA leakage at 8.0 V - avoids standby power loss and false fault triggering. |
Use Scenario: Hardening PoE-powered network switches against induced transients on 48 V DC input from outdoor cabling. IC Role / Device Role / Timing Role: Front-end TVS on PSE-side DC feed, coordinated with upstream fuse and current-limiting circuitry. Use Value: Withstands repeated 10/1000 µs surges up to 44.1 A without derating - ensures uptime in telecom central office deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A-E3/5B | Same VWM, VBR, and VC; commercial-grade (non-AEC-Q101), no automotive qualification. | Limited to consumer/industrial use where automotive reliability certification is not required. | Select when cost sensitivity outweighs automotive qualification needs and ambient temperature stays below 125 °C. |
| SMCJ8.0AHE3/5B | Same electrical specs but in larger SMC (DO-214AB) package; higher IPPM (71.4 A) and PPPM (1500 W). | Better suited for high-energy surge zones (e.g., main vehicle battery bus) where PCB space allows larger footprint. | Choose when system-level surge testing requires >600 W margin or thermal mass demands lower RθJA (50 °C/W typical). |
Compared with SMBJ8.0A-E3/5B, SMBJ8.0HE3/5B adds AEC-Q101 qualification for automotive use; compared with SMCJ8.0AHE3/5B, it trades surge capacity for compact SMB footprint - ideal for space-constrained ECU nodes needing certified reliability.
Availability
SMBJ8.0HE3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ8.0HE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and ruggedized performance.
The SMBJ series targets board-level transient protection in harsh environments - engineered for automotive, industrial, and telecom applications where consistent clamping behavior and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ8.0HE3/5B at its rated peak pulse current?
The SMBJ8.0HE3/5B has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current (IPPM) of 44.1 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected circuits experience no more than 13.6 V during worst-case surge events - critical for safeguarding 12 V-tolerant ICs. The SMBJ8.0HE3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ8.0HE3/5B suitable for automotive applications?
Yes, SMBJ8.0HE3/5B is AEC-Q101 qualified, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor modules. The HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction. It meets stringent requirements for thermal cycling, humidity resistance, and surge endurance - validated per automotive reliability standards. Engineers deploying SMBJ8.0HE3/5B in vehicles can rely on its tested performance under real-world under-hood conditions.
What is the difference between SMBJ8.0HE3/5B and SMBJ8.0A-E3/5B?
The core difference is qualification: SMBJ8.0HE3/5B is AEC-Q101 qualified and rated for automotive use, while SMBJ8.0A-E3/5B is commercial-grade only. Both share identical electrical parameters (VWM = 8.0 V, VBR = 8.89–9.83 V, VC ≤ 13.6 V), package (SMB), and thermal specs. However, SMBJ8.0HE3/5B undergoes additional stress testing for temperature cycling, mechanical shock, and lifetime reliability - essential for automotive Tier 1 suppliers. For non-automotive designs, SMBJ8.0A-E3/5B offers cost savings without sacrificing clamping performance.
What PCB pad layout is recommended for SMBJ8.0HE3/5B to achieve its rated thermal performance?
To achieve the specified RθJA of 100 °C/W, Vishay recommends mounting SMBJ8.0HE3/5B on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Figure 2 in Document 88392. These pads must be connected to internal ground/power planes via ≥2 thermal vias per pad (0.3 mm diameter, filled or plated). Deviating from this layout increases junction temperature rise during surge events - potentially reducing clamping consistency and long-term reliability. The SMBJ8.0HE3/5B datasheet provides exact dimensions in inches and millimeters for the SMB (DO-214AA) outline.
Does SMBJ8.0HE3/5B have polarity marking, and how is it oriented in circuit?
Yes, SMBJ8.0HE3/5B is unidirectional and features a cathode band (visible as a dark stripe) on the SMB package - this marks the cathode terminal. In circuit, the banded end connects to the line being protected (e.g., 12 V rail), while the unbanded (anode) end connects to ground. This orientation ensures the device remains reverse-biased during normal operation and avalanches only during overvoltage events. Reversing polarity would render SMBJ8.0HE3/5B ineffective as a clamp and could cause catastrophic failure under surge conditions.
SMBJ8.0HE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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)
SMBJ8.0HE3/5B FAQ
1.How can I place an order for SMBJ8.0HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0HE3/5B 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 SMBJ8.0HE3/5B reliable?
The price and inventory of SMBJ8.0HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ8.0HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0HE3/5B?
SMBJ8.0HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0HE3/5B 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 SMBJ8.0HE3/5B?
For technical support, including SMBJ8.0HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0HE3/5B requirements.
6.How does Aetrix verify that SMBJ8.0HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0HE3/5B 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 SMBJ8.0HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ8.0HE3/5B?
All SMBJ8.0HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0HE3/5B, 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 SMBJ8.0HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ8.0HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0HE3/5B Tags
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