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Vishay General Semiconductor - Diodes Division SMBJ8.0AHM3/I
- Part No.:
- SMBJ8.0AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0AHM3/I.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,617
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Product details
Overview
SMBJ8.0AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMBJ8.0AHM3/I datasheet, SMBJ8.0AHM3/I pinout, SMBJ8.0AHM3/I application, or SMBJ8.0AHM3/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world clamping performance under standardized surge waveforms - critical for robust overvoltage protection design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp with cathode-banded polarity, leveraging glass-passivated junction technology for stable breakdown and low incremental surge resistance. Its 100 °C/W junction-to-ambient thermal resistance (RθJA) and 20 °C/W junction-to-lead (RθJL) define thermal limits under repetitive surge conditions.
The device meets MSL Level 1 per J-STD-020 (peak reflow ≤ 260 °C), supports automated placement, and is rated for -55 °C to +150 °C operating junction temperature. Its 1.0 µA max reverse leakage at VWM enables low-power standby compatibility in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below circuit supply rails. |
| VBR (min/max) | 8.89 V / 9.83 V at 10 mA - Confirmed breakdown range ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 13.6 V at 44.1 A - Clamping voltage under 10/1000 µs surge defines worst-case stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling capacity determines survivability against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 µA max - Ultra-low leakage preserves battery life and avoids false triggering in high-impedance sensing paths. |
| TJ max. | +150 °C - Enables operation in under-hood automotive and industrial environments without thermal shutdown. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal footprint. |
Pinout & Package
Package: SMB (DO-214AA), molded case with matte tin-plated leads, cathode indicated by band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), MSL Level 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail or sensor output); conducts avalanche current when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 4 kV without degradation. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics per stress test requirements including HTOL and TC. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration standards for green manufacturing. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected ICs. |
| Fast response time & low dynamic impedance | Sub-nanosecond turn-on and < 0.3 Ω incremental surge resistance ensure effective suppression before system damage occurs. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery rail in vehicle infotainment modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fuse and DC-DC converter input. Use Value: Limits transient voltage to ≤13.6 V, preventing overvoltage failure of 16 V-rated buck regulators and CAN transceivers. |
Use Scenario: 4–20 mA current loop transmitter connected to pressure sensor in factory automation PLC I/O module. IC Role / Device Role / Timing Role: Primary surge shunt on analog input line upstream of op-amp signal conditioning stage. Use Value: Clamps induced lightning surges to <14 V, preserving 12-bit ADC accuracy and avoiding op-amp saturation or latch-up. |
| Consumer USB Port ESD Protection | Telecom Power Supply Input Stage |
Use Scenario: VBUS line of USB 2.0 host port in smart home gateway subjected to ±8 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: First-line transient suppressor before USB switch and power delivery controller. Use Value: Responds in <1 ns to divert >15 A ESD current, maintaining VBUS stability within 5.5 V tolerance during event. |
Use Scenario: 48 V DC input to telecom base station power module encountering AC line-induced surges. IC Role / Device Role / Timing Role: Secondary clamping device after MOV, absorbing residual energy not handled by front-end protection. Use Value: Provides precise 13.6 V clamping to safeguard 50 V-rated rectifier diodes and primary-side controller ICs. |
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/I | Same electrical specs, but RoHS-compliant without halogen-free certification; no AEC-Q101 qualification. | Restricted to commercial-grade industrial and consumer applications; not approved for automotive use. | Select when AEC-Q101 and halogen-free requirements are not mandated, and cost optimization is prioritized. |
| SMAJ8.0A-M3 | Lower PPPM (400 W), larger VBR tolerance (8.89–10.5 V), SMA package (smaller thermal mass, higher RθJA = 140 °C/W). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Choose only for space-constrained designs where surge energy is confirmed ≤400 W and thermal margin permits higher junction rise. |
Compared with SMBJ8.0AHE3/I and SMAJ8.0A-M3, SMBJ8.0AHM3/I uniquely combines AEC-Q101 qualification, halogen-free compliance, and full 600 W surge capability in SMB package - making it the sole option for automotive-grade 12 V rail protection requiring both reliability and regulatory alignment.
Availability
SMBJ8.0AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supplies requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for SMBJ8.0AHM3/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, and protection devices with emphasis on reliability, thermal performance, and automotive-grade qualification.
The SMBJ series was developed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against ESD, lightning, and load-dump events is mission-critical.
FAQ
What is the clamping voltage of SMBJ8.0AHM3/I under a 10/1000 µs surge?
The SMBJ8.0AHM3/I has a maximum clamping voltage (VC) of 13.6 V at 44.1 A peak pulse current (IPPM) under the standardized 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 - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ8.0AHM3/I qualified for automotive applications?
Yes, SMBJ8.0AHM3/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (uHAST), making SMBJ8.0AHM3/I suitable for engine control units, body electronics, and ADAS power domains.
How does the SMBJ8.0AHM3/I differ from the SMBJ8.0A-E3/I variant?
The SMBJ8.0AHM3/I differs from SMBJ8.0A-E3/I in three key ways: it is halogen-free (vs. standard RoHS), AEC-Q101 qualified (vs. commercial grade only), and uses matte tin plating meeting JESD 201 Class 2 whisker resistance. These distinctions make SMBJ8.0AHM3/I appropriate for automotive and high-reliability industrial deployments where material compliance and qualification are mandatory.
What is the thermal resistance of SMBJ8.0AHM3/I, and how does it affect layout design?
SMBJ8.0AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks - underscoring why SMBJ8.0AHM3/I requires minimum recommended pad dimensions per Vishay's outline drawing.
Can SMBJ8.0AHM3/I be used in bidirectional configurations?
No, SMBJ8.0AHM3/I is a unidirectional TVS diode, identified by its cathode band marking and specified VBR/VWM values for single-polarity operation. For bidirectional protection, Vishay offers the SMBJ8.0CA variant - which has symmetrical breakdown in both directions and no polarity marking. Using SMBJ8.0AHM3/I in reverse-biased AC applications would result in forward conduction and failure.
SMBJ8.0AHM3/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:
- 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/I FAQ
1.How can I place an order for SMBJ8.0AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0AHM3/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 SMBJ8.0AHM3/I reliable?
The price and inventory of SMBJ8.0AHM3/I 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/I is usually 5 days.
3.What payment methods are accepted for SMBJ8.0AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0AHM3/I?
SMBJ8.0AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0AHM3/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 SMBJ8.0AHM3/I?
For technical support, including SMBJ8.0AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0AHM3/I requirements.
6.How does Aetrix verify that SMBJ8.0AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0AHM3/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 SMBJ8.0AHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ8.0AHM3/I?
All SMBJ8.0AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0AHM3/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 SMBJ8.0AHM3/I part is unused and in its original packaging.
Return procedure for SMBJ8.0AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0AHM3/I Tags
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