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Vishay General Semiconductor - Diodes Division SMBJ7.0AHM3/I
- Part No.:
- SMBJ7.0AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0AHM3/I.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,553
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Product details
Overview
SMBJ7.0AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA test current, 12.0 V maximum clamping voltage (VC) at 50.0 A peak pulse current, and 600 W peak pulse power rating with a 10/1000 µs waveform.
For engineers reviewing the SMBJ7.0AHM3/I datasheet, SMBJ7.0AHM3/I pinout, SMBJ7.0AHM3/I application, or SMBJ7.0AHM3/I equivalent, this device is selected for robust overvoltage protection on DC power rails and low-voltage signal lines in automotive ECUs, industrial I/O modules, and sensor interface circuits where fast response (<1 ps), low clamping ratio, and AEC-Q101 qualification are required.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only in reverse bias above VBR to limit transient voltages to ≤12.0 V while absorbing up to 600 W of surge energy. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<800 µA at 7.0 V).
The SMBJ7.0AHM3/I is halogen-free and RoHS-compliant (HM3 suffix), qualified to AEC-Q101 for automotive use, and rated for operation from –55 °C to +150 °C junction temperature. It meets UL 497B recognition (QVGQ2) and is specified for mounting on 0.2" × 0.2" copper pads per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 5 V or 6 V systems. |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA - Confirmed breakdown range ensures reliable triggering without premature conduction under normal operation. |
| VC @ IPPM | 12.0 V at 50.0 A - Clamping voltage limits downstream IC stress during 10/1000 µs transients; clamping ratio = 1.71. |
| PPPM | 600 W - Peak surge power handling capability with standard 10/1000 µs waveform; supports IEC 61000-4-5 Level 3/4 compliance. |
| IPPM | 50.0 A - Peak pulse current capacity directly derived from VC and PPPM; enables protection of 12 V automotive power inputs. |
| TJ max | +150 °C - Maximum junction temperature rating allows deployment in under-hood automotive environments and high-ambient industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, polarity indicated by cathode band. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per JEDEC recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (low-side reference) | Connected to ground or lower-potential node; defines directionality for unidirectional clamping. |
| Cathode | Reverse-biased clamping terminal (high-side input) | Connected to protected line (e.g., 5 V rail); conducts avalanche current when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and surge endurance-enables use in engine control, ADAS, and body electronics. |
| 600 W peak pulse power | Withstands 10/1000 µs transients up to 50 A without degradation-meets ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 requirements. |
| Low clamping voltage (12.0 V) | Minimizes voltage overshoot on protected 5–7 V rails, reducing risk of latch-up or gate oxide damage in downstream MOSFETs and microcontrollers. |
| Halogen-free & RoHS-compliant (HM3) | Complies with environmental regulations for global automotive and industrial markets; no brominated flame retardants in molding compound. |
| MSL Level 1 (260 °C peak) | Unlimited floor life and compatibility with standard lead-free reflow profiles-eliminates baking requirements prior to assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 5 V supply lines in engine control units (ECUs) from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VIN and GND, triggered within <1 ps to shunt surge current away from LDOs and MCU power pins. Use Value: Limits transient voltage to ≤12.0 V, preventing brownout resets and permanent damage to 5 V logic circuitry under ISO 7637-2 Pulse 5a conditions. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop drivers) in factory automation sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across signal and return paths to absorb ±8 kV contact ESD per IEC 61000-4-2 without distorting low-frequency analog signals. Use Value: Maintains signal integrity below 100 kHz while clamping ESD-induced spikes to <15 V, avoiding op-amp saturation or ADC offset errors. |
| Consumer USB Port Surge Suppression | Telecom DC Power Input Protection |
|
Use Scenario: Safeguarding USB VBUS lines in portable docking stations against hot-plug inrush and external surge coupling. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VBUS and GND, activated before internal USB switch FETs experience overvoltage stress. Use Value: Clamps 10/1000 µs surges to 12.0 V at 50 A, ensuring USB PD controllers remain within absolute maximum ratings during field-relevant transients. |
Use Scenario: Guarding -48 V DC telecom power inputs against lightning-induced surges on outdoor cabinet feed lines. IC Role / Device Role / Timing Role: Staged TVS element in multi-level protection scheme-first-line clamp limiting initial surge edge before MOV and GDT stages engage. Use Value: Fast response (<1 ps) and precise 7.0 V stand-off enable coordination with upstream crowbar circuits, minimizing let-through energy to downstream DC/DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0AHE3/I | Same electrical specs but RoHS-compliant (E3), non-halogen-free; lacks halogen-free certification. | Approved for commercial/industrial use; not certified for halogen-free automotive programs (e.g., VW TL 813). | Select SMBJ7.0AHE3/I only if halogen-free compliance is not mandated by end-customer specification. |
| SMAJ7.0A-M3 | Lower peak pulse power (400 W vs. 600 W); same VWM/VC but reduced IPPM (33.3 A). | Suitable for less severe surge environments (e.g., IEC 61000-4-2 only); insufficient for ISO 7637-2 Pulse 5a. | Choose SMAJ7.0A-M3 only for space-constrained designs where 400 W rating suffices and SMB footprint is unavailable. |
Compared with SMBJ7.0AHE3/I and SMAJ7.0A-M3, the SMBJ7.0AHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, and full 600 W surge capability in the SMB package-making it the only option qualified for high-reliability automotive power rail protection where both material compliance and robustness are mandatory.
Availability
SMBJ7.0AHM3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ7.0AHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom-where consistent clamping behavior, low leakage, and AEC-Q101 validation are critical design requirements.
FAQ
What is the maximum clamping voltage of the SMBJ7.0AHM3/I under a 10/1000 µs surge?
The SMBJ7.0AHM3/I has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current of 50.0 A with a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88392 and reflects worst-case clamping performance at TA = 25 °C on recommended PCB pads. The SMBJ7.0AHM3/I maintains this clamping level across its operational temperature range, making it suitable for protecting 5 V and 6 V rails in automotive and industrial systems.
Is the SMBJ7.0AHM3/I suitable for automotive applications?
Yes, the SMBJ7.0AHM3/I is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It meets requirements for under-hood and chassis-mounted modules, including thermal cycling, humidity resistance, and surge endurance. The SMBJ7.0AHM3/I is commonly deployed in engine control units, body control modules, and ADAS camera power supplies where transient immunity and long-term reliability are essential.
What does the "HM3" suffix indicate in SMBJ7.0AHM3/I?
The "HM3" suffix in SMBJ7.0AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "M" signifies halogen-free molding compound, and "3" confirms RoHS compliance. This distinguishes it from E3 (RoHS only) and HE3 (AEC-Q101 + RoHS, but not halogen-free) variants. The SMBJ7.0AHM3/I satisfies stringent material requirements for global automotive OEMs such as VW, BMW, and Ford.
How does the SMBJ7.0AHM3/I compare to bidirectional TVS diodes like SMBJ7.0CA?
The SMBJ7.0AHM3/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., VCC-to-GND), offering lower leakage and higher surge current capability than its bidirectional counterpart SMBJ7.0CA. The SMBJ7.0CA supports AC or floating signal lines but exhibits double the reverse leakage at VWM. For 5 V DC rails, the SMBJ7.0AHM3/I provides superior clamping precision and lower standby power loss-critical in always-on automotive modules.
What is the thermal resistance of the SMBJ7.0AHM3/I, and how does it affect layout?
The SMBJ7.0AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, PCB layout must include adequate copper area and avoid thermal bottlenecks. The SMBJ7.0AHM3/I's RθJL of 20 °C/W to leads further emphasizes the need for short, wide traces to thermal pads-especially in high-reliability automotive designs where thermal margin directly impacts lifetime.
SMBJ7.0AHM3/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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 50A
- 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)
SMBJ7.0AHM3/I FAQ
1.How can I place an order for SMBJ7.0AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0AHM3/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 SMBJ7.0AHM3/I reliable?
The price and inventory of SMBJ7.0AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0AHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.0AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0AHM3/I?
SMBJ7.0AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0AHM3/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 SMBJ7.0AHM3/I?
For technical support, including SMBJ7.0AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0AHM3/I requirements.
6.How does Aetrix verify that SMBJ7.0AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0AHM3/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 SMBJ7.0AHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.0AHM3/I?
All SMBJ7.0AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0AHM3/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 SMBJ7.0AHM3/I part is unused and in its original packaging.
Return procedure for SMBJ7.0AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0AHM3/I Tags
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