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Vishay General Semiconductor - Diodes Division SMBJ8.0AHM3/H
- Part No.:
- SMBJ8.0AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0AHM3/H.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,385
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Product details
Overview
SMBJ8.0AHM3/H 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, 13.6 V maximum clamping voltage (VC) at 44.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines of industrial sensor interfaces.
For engineers reviewing the SMBJ8.0AHM3/H datasheet, SMBJ8.0AHM3/H pinout, SMBJ8.0AHM3/H application, or SMBJ8.0AHM3/H equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world clamping performance under surge transients induced by inductive switching or ESD events.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 100 °C/W junction-to-ambient thermal resistance requires PCB copper pad design per Vishay's 0.2" × 0.2" (5.0 mm × 5.0 mm) recommendation for rated 600 W pulse handling.
The SMBJ8.0AHM3/H meets J-STD-020 MSL Level 1 moisture sensitivity and withstands 260 °C lead-free reflow peak temperature. Its 150 °C maximum junction temperature and -55 °C to +150 °C operating range support automotive-grade reliability when ordered with HM3 suffix (halogen-free, AEC-Q101 qualified).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse working voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR @ IT = 10 mA | 8.89–9.83 V - Breakdown threshold range where device transitions from high-impedance to low-impedance clamping state. |
| VC @ IPPM = 44.1 A | 13.6 V - Maximum clamped voltage during 600 W 10/1000 µs surge; defines worst-case stress on protected IC or MOSFET. |
| IPPM | 44.1 A - Peak pulse current capability under standardized 10/1000 µs waveform; determines surge energy absorption capacity. |
| PPPM | 600 W - Peak pulse power rating; defines transient energy handling without degradation under specified duty cycle (0.01 %). |
| TJ max. | +150 °C - Maximum junction temperature; constrains thermal design margin and long-term reliability under repeated surges. |
| Package | SMB (DO-214AA) - Surface-mount outline with 2.20 mm × 3.94 mm body, optimized for automated placement and 0.2" × 0.2" copper pad thermal management. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms clamping path when cathode is biased above VWM. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V supply or sensor output); clamps to VC during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients like ISO 7637-2 Pulse 1/2a/5a in automotive power nets without external heat sinking. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power supplies per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020 standards; supports environmentally regulated industrial and consumer product certifications. |
| MSL Level 1, 260 °C peak reflow | Allows single-pass lead-free assembly without preconditioning; eliminates moisture-related popcorning risk during manufacturing. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage overshoot on protected circuits - critical for safeguarding 3.3 V or 5 V logic interfaces downstream of DC-DC converters. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges up to 600 W before reaching LDOs or microcontrollers. Use Value: Limits clamped voltage to 13.6 V, preventing damage to 16 V-rated input stages while maintaining system uptime during vehicle ignition cycles. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across differential signal pair (e.g., 4–20 mA loop) to shunt fast transients before op-amp inputs. Use Value: Sub-ns response ensures clamping occurs before sensor amplifier saturation, preserving measurement integrity during field maintenance. |
| Consumer USB Port Surge Suppression | Telecom DC Power Input Protection |
|
Use Scenario: Safeguarding USB-C power delivery (PD) controller ICs from hot-plug induced voltage spikes and nearby lightning-induced surges. IC Role / Device Role / Timing Role: Placed on VBUS line upstream of buck converter to absorb 600 W pulses without forward conduction into host system. Use Value: 13.6 V clamping prevents latch-up in PD controllers rated for 20 V absolute maximum, enabling certified 5 V/9 V/15 V/20 V operation. |
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced common-mode surges entering central office equipment. IC Role / Device Role / Timing Role: Used in back-to-back configuration (with bidirectional variant) or as unidirectional clamp on negative rail relative to chassis ground. Use Value: 44.1 A peak current rating handles IEEE C62.41 Category C surges; halogen-free construction meets Telcordia GR-1089-CORE flame and toxicity specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0AHE3/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same VWM, VBR, VC, and package. | Approved for commercial/industrial use only; unsuitable for automotive production where halogen-free and AEC-Q101 are mandated. | Select when cost-sensitive non-automotive designs require identical clamping performance without halogen-free or automotive certification. |
| SMBJ8.0CAHM3/H | Bidirectional variant with symmetrical ±8.0 V VWM; same package and 600 W rating but dual-clamp architecture. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal or differential surges occur. | Choose for bidirectional protection needs; note that VC remains 13.6 V per direction, but device conducts in both polarities. |
Compared with SMBJ8.0AHM3/H, the HE3/H alternative trades halogen-free and automotive qualification for lower cost in commercial systems, while the CAHM3/H variant adds bidirectional symmetry at no clamping performance penalty - enabling reuse of layout space for dual-purpose surge paths.
Availability
SMBJ8.0AHM3/H is available at Aetrix Electronics and suitable for automotive ECU power conditioning, industrial sensor interface protection, and telecom DC input hardening requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMBJ8.0AHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven clamping consistency and thermal robustness.
FAQ
What is the maximum clamping voltage of SMBJ8.0AHM3/H under a 600 W surge?
The SMBJ8.0AHM3/H exhibits a maximum clamping voltage (VC) of 13.6 V when subjected to its rated 44.1 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on recommended 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ8.0AHM3/H maintains this clamping performance across its full operating temperature range, with minimal drift due to its 0.069 %/°C VBR temperature coefficient.
Is SMBJ8.0AHM3/H qualified for automotive applications?
Yes, SMBJ8.0AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It has passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - making it suitable for under-hood and cabin-mounted automotive electronics such as body control modules and ADAS camera power supplies. The SMBJ8.0AHM3/H also meets MSL Level 1 and 260 °C lead-free reflow requirements for automotive manufacturing.
How does the SMBJ8.0AHM3/H differ from SMBJ8.0AHE3/H?
The SMBJ8.0AHM3/H differs from SMBJ8.0AHE3/H in three key aspects: it is halogen-free (per IEC 61249-2-21), carries AEC-Q101 qualification, and uses a different material set for molding compound and terminations. Electrically and thermally, both share identical VWM (8.0 V), VBR (8.89–9.83 V), VC (13.6 V), and package (SMB). The SMBJ8.0AHM3/H is designated for automotive and environmentally regulated industrial applications, whereas SMBJ8.0AHE3/H serves general commercial use.
What is the thermal resistance of SMBJ8.0AHM3/H, and how does it affect layout?
The SMBJ8.0AHM3/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. This value assumes no additional heatsinking and dictates PCB copper area requirements: reducing RθJA below 100 °C/W requires larger or thermally connected pads. For repeated 600 W surges, thermal design must ensure junction temperature stays below 150 °C - especially at elevated ambient temperatures - using Vishay's Fig. 2 derating curves. The SMBJ8.0AHM3/H's RθJL of 20 °C/W further supports efficient heat transfer to PCB traces.
Can SMBJ8.0AHM3/H be used in bidirectional signal protection?
No, SMBJ8.0AHM3/H is strictly unidirectional and must be oriented with cathode toward the protected line and anode to ground. For bidirectional signal protection (e.g., RS-485, CAN, or AC-coupled audio), the bidirectional variant SMBJ8.0CAHM3/H is required - it provides symmetrical clamping for both positive and negative transients. Using SMBJ8.0AHM3/H on bidirectional lines risks forward conduction during negative excursions, potentially damaging downstream circuitry. The SMBJ8.0AHM3/H datasheet explicitly states polarity dependence via cathode band marking.
SMBJ8.0AHM3/H 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 44.1A
- 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)
SMBJ8.0AHM3/H FAQ
1.How can I place an order for SMBJ8.0AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0AHM3/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 SMBJ8.0AHM3/H reliable?
The price and inventory of SMBJ8.0AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0AHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ8.0AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0AHM3/H?
SMBJ8.0AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0AHM3/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 SMBJ8.0AHM3/H?
For technical support, including SMBJ8.0AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0AHM3/H requirements.
6.How does Aetrix verify that SMBJ8.0AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0AHM3/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 SMBJ8.0AHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ8.0AHM3/H?
All SMBJ8.0AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0AHM3/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 SMBJ8.0AHM3/H part is unused and in its original packaging.
Return procedure for SMBJ8.0AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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