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Vishay General Semiconductor - Diodes Division SMBJ7.0AHM3_A/H
- Part No.:
- SMBJ7.0AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0AHM3_A/H.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ7.0AHM3_A/H 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, 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_A/H datasheet, SMBJ7.0AHM3_A/H pinout, SMBJ7.0AHM3_A/H application, or SMBJ7.0AHM3_A/H equivalent, key selection considerations include its halogen-free RoHS-compliant construction (HM3 suffix), AEC-Q101 qualification readiness, low incremental surge resistance, and suitability for automotive, industrial, and telecom signal-line protection where fast response (<1 ps) and stable clamping under repetitive transients are required.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior. Its thermal resistance (RθJA = 100 °C/W) and junction temperature limit (TJ = –55 to +150 °C) support reliable operation on standard PCB copper pads (0.2" × 0.2") without forced cooling.
The SMBJ7.0AHM3_A/H delivers 50.0 A peak pulse current (IPPM) at 12.0 V clamping, with <0.1 µA reverse leakage at VWM, enabling low-power standby integrity. Its 0.065 %/°C VBR temperature coefficient ensures predictable voltage threshold drift across operating temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before significant leakage; sets safe margin below system supply rails. |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA - Confirmed avalanche onset range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 12.0 V at 50.0 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected ICs. |
| PPPM | 600 W - Peak pulse power handling capability; supports high-energy ESD and lightning-induced transients. |
| IPPM | 50.0 A - Maximum non-repetitive surge current; determines minimum trace width and layout robustness needed. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount footprint (5.21 mm × 4.06 mm × 2.20 mm); compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, MSL Level 1 compliant (peak reflow 260 °C), UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; clamps positive transients to ground when referenced correctly. |
| Anode (non-banded end) | Cathode of internal PN junction | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V lines without derating. |
| 12.0 V clamping voltage at 50 A | Limits stress on downstream 3.3 V or 5 V logic interfaces during 10/1000 µs transients, preserving signal integrity. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets IPC-1752A material declaration requirements and EU environmental compliance for automotive and industrial OEMs. |
| AEC-Q101 qualified option available | Supports automotive-grade qualification path via HM3_X suffix variants; validated for temperature cycling, HTRB, and surge life. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin for high-speed interfaces. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus or 12 V power inputs in body control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power rail and ground, absorbing energy before it reaches LDOs or microcontrollers. Use Value: Maintains VC ≤ 12.0 V during 50 A surges, preventing latch-up or permanent damage to 12 V-tolerant interface ICs. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) and digital sensor lines (I²C, SPI) in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry transient suppressor on sensor harness connectors, shunting induced noise to chassis ground. Use Value: Sub-1 ns response time limits voltage excursion to <12.0 V, preserving ADC reference stability and communication timing margins. |
| Telecom DC Power Input Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Safeguarding 48 V PoE-powered equipment front-end rectifiers and DC-DC controllers from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level unidirectional TVS on input bulk capacitor rail, coordinated with upstream MOVs for staged energy absorption. Use Value: 600 W rating sustains multiple 10/1000 µs events without degradation, extending field service life in harsh environments. |
Use Scenario: Adding secondary-level surge immunity to USB Type-A ports in smart home hubs exposed to user-handling ESD and cable coupling. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) clamping device on VBUS and D+/D− lines, grounded via short traces. Use Value: 7.0 V VWM allows full 5 V USB operation while clamping 8 kV contact ESD to <12.0 V, meeting IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A-E3/52 | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free certification or AEC-Q101 path. | Approved for general industrial and consumer use; not designated for automotive or regulated halogen-free supply chains. | Select when halogen-free compliance or automotive qualification is not required; lower cost and broader distributor stock. |
| SMBJ7.0CAHM3_A/H | Bidirectional variant with identical VWM (7.0 V), VBR, and VC, but symmetrical clamping in both polarities. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN) where negative transients must also be suppressed. | Choose only if bidirectional protection is mandated; otherwise, SMBJ7.0AHM3_A/H offers superior cost and layout efficiency for DC rails. |
Compared with SMBJ7.0A-E3/52, the SMBJ7.0AHM3_A/H adds halogen-free compliance and AEC-Q101 qualification readiness, making it suitable for Tier 1 automotive suppliers; versus SMBJ7.0CAHM3_A/H, it provides optimized unidirectional clamping with simpler grounding and reduced parasitic capacitance on DC power paths.
Availability
SMBJ7.0AHM3_A/H is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial sensor node interfaces, and telecom DC input stages requiring stable component supply, halogen-free compliance, and long-term lifecycle continuity.
Supply support for SMBJ7.0AHM3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade validation.
The SMBJ series was developed specifically for high-energy transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems where robustness and standardized packaging are critical.
FAQ
What is the maximum clamping voltage of the SMBJ7.0AHM3_A/H under surge conditions?
The SMBJ7.0AHM3_A/H has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated 50.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that protected circuitry downstream will not experience more than 12.0 V during such transient events. The SMBJ7.0AHM3_A/H maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is the SMBJ7.0AHM3_A/H suitable for automotive applications?
Yes - the SMBJ7.0AHM3_A/H carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and eligibility for AEC-Q101 qualification (via HM3_X variants). While the base SMBJ7.0AHM3_A/H is commercially rated, its design, thermal performance (TJ max = +150 °C), and surge robustness align with automotive subsystem requirements including body electronics and infotainment power rails. Full AEC-Q101 test reports are available for HM3_B/H and HM3_C/H revisions.
How does the SMBJ7.0AHM3_A/H differ from the SMBJ7.0A-E3/52?
The SMBJ7.0AHM3_A/H and SMBJ7.0A-E3/52 share identical electrical characteristics (VWM, VBR, VC, PPPM) and SMB package dimensions, but differ in material compliance: SMBJ7.0AHM3_A/H is halogen-free and built to Vishay's HM3 specification, whereas SMBJ7.0A-E3/52 meets RoHS but not halogen-free requirements. Both are unidirectional, but only HM3 variants support AEC-Q101 qualification pathways and meet stricter environmental mandates for Tier 1 automotive supply chains.
What is the thermal resistance of the SMBJ7.0AHM3_A/H, and how does it affect PCB layout?
The SMBJ7.0AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB construction with no internal planes. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, designers should allocate ≥250 mm² total copper area per pad and avoid narrow traces. The SMBJ7.0AHM3_A/H does not require heatsinking for transient-only duty cycles (duty cycle ≤ 0.01 %).
Can the SMBJ7.0AHM3_A/H be used for bidirectional signal line protection?
No - the SMBJ7.0AHM3_A/H is strictly unidirectional, with polarity marked by a cathode band. For bidirectional protection (e.g., RS-485, CAN, or AC-coupled audio), the SMBJ7.0CAHM3_A/H variant must be used. Attempting to use SMBJ7.0AHM3_A/H on bidirectional lines risks forward conduction during negative transients, leading to excessive leakage, overheating, or failure. Always verify polarity alignment during schematic capture and layout for the SMBJ7.0AHM3_A/H.
SMBJ7.0AHM3_A/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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ7.0AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0AHM3_A/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 SMBJ7.0AHM3_A/H reliable?
The price and inventory of SMBJ7.0AHM3_A/H 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_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.0AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0AHM3_A/H?
SMBJ7.0AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0AHM3_A/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 SMBJ7.0AHM3_A/H?
For technical support, including SMBJ7.0AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ7.0AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0AHM3_A/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 SMBJ7.0AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.0AHM3_A/H?
All SMBJ7.0AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0AHM3_A/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 SMBJ7.0AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ7.0AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0AHM3_A/H Tags
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