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Vishay General Semiconductor - Diodes Division SMBJ7.0AHM3/H
- Part No.:
- SMBJ7.0AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0AHM3/H.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,338
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Product details
Overview
SMBJ7.0AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage at 10 mA (VBR), 12.0 V maximum clamping voltage at 50.0 A peak pulse current (VC), and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive power rail protection and industrial sensor interface circuits.
For engineers reviewing the SMBJ7.0AHM3/H datasheet, SMBJ7.0AHM3/H pinout, SMBJ7.0AHM3/H application, or SMBJ7.0AHM3/H equivalent, key selection criteria include unidirectional polarity, halogen-free RoHS-compliant construction (HM3 suffix), AEC-Q101 qualification readiness, and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
This TVS diode operates as a clamping device that conducts above its breakdown threshold to limit transient overvoltage across protected circuit nodes. Its glass-passivated junction ensures stable leakage performance (<800 μA at VWM), while low incremental surge resistance enables effective energy diversion during 10/1000 μs surges up to 50.0 A.
The SMBJ7.0AHM3/H is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its unidirectional configuration requires cathode-band orientation during PCB layout, and it delivers consistent clamping behavior without degradation under repetitive 0.01% duty-cycle pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse working voltage before significant conduction begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 7.78 V / 8.60 V at IT = 10 mA - Confirmed breakdown range defining reliable turn-on threshold under standardized test conditions. |
| VC @ IPPM | 12.0 V at 50.0 A - Clamped voltage during worst-case 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability with 10/1000 μs waveform; defines transient energy absorption capacity. |
| ID @ VWM | 800 μA - Reverse leakage current at rated stand-off voltage; impacts quiescent power loss and noise coupling in high-impedance nodes. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; governs temperature rise under sustained power dissipation. |
| TJ max. | +150 °C - Maximum allowable junction temperature; constrains derating curves for elevated ambient or pulsed operation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode identified by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during positive transients on cathode side. |
| Cathode | High-side transient clamp node | Connected to protected line (e.g., 12 V rail); conducts when voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (e.g., 4 kV line-earth) without failure on standard PCB layouts. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage exposure to downstream components - critical for 5 V or 3.3 V logic interfaces powered from 7–12 V rails. |
| AEC-Q101 qualified variant available (HM3 suffix) | Supports automotive-grade reliability requirements including temperature cycling, HTRB, and ESD testing per AEC standards. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak, eliminating bake requirements prior to assembly. |
| Glass passivated junction | Ensures long-term stability of leakage current and breakdown voltage under thermal and humidity stress in industrial environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: 12 V battery-fed control modules exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp transients before they reach DC/DC converters and microcontrollers. Use Value: Limits peak voltage to ≤12.0 V during 50 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V system-on-chip devices. |
Use Scenario: Analog output lines (e.g., 4–20 mA current loop) from pressure sensors in factory automation equipment. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb ESD (IEC 61000-4-2 ±8 kV contact) and fast transients induced by nearby motor switching. Use Value: Sub-12.0 V clamping preserves signal integrity and avoids saturation of op-amp input stages, maintaining measurement accuracy within ±0.1% FS. |
| Consumer USB Power Input Protection | Telecom DSL Line Surge Suppression |
|
Use Scenario: 5 V USB-powered smart home hubs receiving unregulated wall adapter input susceptible to AC line transients. IC Role / Device Role / Timing Role: Primary clamping device upstream of USB PD controller and LDO regulators to prevent overvoltage shutdown or brownout. Use Value: Withstand 600 W surges while holding clamped voltage below 12.0 V ensures uninterrupted operation during lightning-induced grid disturbances. |
Use Scenario: DSL line cards interfacing twisted-pair telephone lines subject to induced surges from adjacent power cables or lightning. IC Role / Device Role / Timing Role: Paired unidirectional TVS diodes (one per line) referenced to common-mode ground to suppress differential-mode surges. Use Value: Fast response time and low VC enable compliance with GR-1089-CORE telecom surge immunity requirements without signal distortion. |
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 | RoHS-compliant commercial grade (E3), non-halogen-free; no AEC-Q101 qualification; same electrical specs and SMB package. | Targeted at cost-sensitive consumer electronics where automotive qualification is unnecessary. | Select when halogen-free content and AEC-Q101 traceability are not required; identical layout and performance in non-automotive use cases. |
| SAC7.0 | Same VWM (7.0 V) and VC (12.0 V), but in smaller SOD-123 package (lower PPPM = 400 W); different thermal profile and mounting footprint. | Suitable for space-constrained portable designs with lower surge threat levels (e.g., IEC 61000-4-2 only). | Choose only if board area is critical and peak surge energy remains ≤400 W; requires PCB redesign due to SOD-123 footprint mismatch. |
Compared with SMBJ7.0A-E3/52, the SMBJ7.0AHM3/H adds halogen-free compliance and AEC-Q101 readiness without sacrificing clamping performance; versus SAC7.0, it delivers 50% higher surge power handling and superior thermal management in the larger SMB package - making it optimal for automotive and industrial deployments demanding robustness and regulatory alignment.
Availability
SMBJ7.0AHM3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, consumer power adapters, and telecom line cards requiring stable component supply with full halogen-free and AEC-Q101-aligned sourcing.
Supply support for SMBJ7.0AHM3/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 is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where voltage spikes threaten system uptime and component longevity.
FAQ
What is the maximum clamping voltage of SMBJ7.0AHM3/H under a 50.0 A transient?
The SMBJ7.0AHM3/H exhibits a maximum clamping voltage (VC) of 12.0 V when subjected to a 50.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88392) and defines the upper voltage limit imposed on protected circuitry during surge events. Maintaining VC ≤12.0 V ensures compatibility with 5 V and 3.3 V logic families downstream of the SMBJ7.0AHM3/H.
Is SMBJ7.0AHM3/H suitable for automotive applications?
Yes, SMBJ7.0AHM3/H is built to support automotive use through its HM3 suffix - indicating halogen-free, RoHS-compliant construction and AEC-Q101 qualification readiness. While the base part number itself does not carry final AEC-Q101 certification, Vishay explicitly states that HM3-suffixed variants meet AEC-Q101 requirements (per note "(1)" in Ordering Information). Designers must verify qualification status via Vishay's official documentation for their specific lot or revision before deployment in safety-critical vehicle systems.
What does the "H" in SMBJ7.0AHM3/H signify?
The "H" in SMBJ7.0AHM3/H denotes the preferred package code for 7" diameter plastic tape and reel delivery, containing 750 units per reel. This packaging format aligns with standard SMT pick-and-place machine feed requirements and supports automated manufacturing. The "HM3" portion confirms halogen-free, RoHS-compliant materials, while the "/H" suffix specifies the physical packaging configuration - distinct from "/I" (13" reel, 3200 units) used for high-volume production runs.
How does SMBJ7.0AHM3/H differ from bidirectional SMBJ7.0CA?
SMBJ7.0AHM3/H is unidirectional, featuring a cathode band and conducting only during positive transients relative to its anode, whereas SMBJ7.0CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Electrically, SMBJ7.0AHM3/H has VWM = 7.0 V and VBR = 7.78–8.60 V, while SMBJ7.0CA offers VWM = 7.0 V but dual-directional breakdown. The SMBJ7.0AHM3/H is selected for DC power rail protection where polarity is fixed; SMBJ7.0CA suits AC or floating signal lines requiring symmetric surge suppression.
What is the thermal resistance of SMBJ7.0AHM3/H, and how does it affect layout?
The SMBJ7.0AHM3/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 minimal copper area - increasing pad size or adding internal ground planes reduces RθJA and improves surge survivability. For repeated surge events or elevated ambient temperatures, designers should verify junction temperature using TJ = TA + (PD × RθJA) or transient thermal impedance curves from the datasheet to avoid exceeding the +150 °C maximum rating.
SMBJ7.0AHM3/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):
- 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/H FAQ
1.How can I place an order for SMBJ7.0AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0AHM3/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 SMBJ7.0AHM3/H reliable?
The price and inventory of SMBJ7.0AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0AHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.0AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0AHM3/H?
SMBJ7.0AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0AHM3/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 SMBJ7.0AHM3/H?
For technical support, including SMBJ7.0AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0AHM3/H requirements.
6.How does Aetrix verify that SMBJ7.0AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0AHM3/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 SMBJ7.0AHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.0AHM3/H?
All SMBJ7.0AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0AHM3/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 SMBJ7.0AHM3/H part is unused and in its original packaging.
Return procedure for SMBJ7.0AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0AHM3/H Tags
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