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Vishay General Semiconductor - Diodes Division SMBJ7.0AHM3_B/H
- Part No.:
- SMBJ7.0AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0AHM3_B/H.pdf
- Description:
- 600W,7.0V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,255
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Product details
Overview
SMBJ7.0AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events on power rails and signal lines. 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 - used in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SMBJ7.0AHM3_B/H datasheet, SMBJ7.0AHM3_B/H pinout, SMBJ7.0AHM3_B/H application, or SMBJ7.0AHM3_B/H equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, unidirectional polarity alignment with DC rail direction, thermal derating above 25 °C ambient, and halogen-free RoHS compliance per Vishay HM3 suffix designation.
Technical Context
This TVS diode operates as a shunt-clamping device: under normal conditions it presents high impedance (>1 MΩ leakage at 7.0 V), but triggers into low-impedance conduction when reverse voltage exceeds VBR, limiting transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surges.
The SMBJ7.0AHM3_B/H is rated for 100 A non-repetitive forward surge current (IFSM) and supports operation from –55 °C to +150 °C junction temperature. Thermal resistance is 100 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads, requiring layout-aware thermal management in high-duty-cycle applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before significant leakage; must exceed system nominal rail voltage (e.g., 5 V or 6.5 V supply) to avoid conduction during normal operation. |
| VBR @ IT = 10 mA | 7.78–8.60 V - Breakdown voltage range defining turn-on threshold; guarantees clamping activation within this band under standardized test conditions. |
| VC @ IPPM = 50.0 A | 12.0 V - Maximum clamped voltage seen by protected circuit during 10/1000 µs surge; determines upper voltage stress limit on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability with 10/1000 µs waveform; defines transient energy absorption capacity before failure. |
| IPPM | 50.0 A - Corresponding peak pulse current at VC = 12.0 V; used to size PCB trace width and grounding paths for safe current diversion. |
| TJ max. | +150 °C - Maximum allowable junction temperature; requires thermal design to maintain below this limit under worst-case surge repetition and ambient conditions. |
| Package | SMB (DO-214AA) - Surface-mount outline with cathode band marking; footprint compatible with automated placement and reflow soldering per J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, compliant with UL 94 V-0 flammability rating. Cathode identified by a single band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction loop during transient clamping event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 7 V rail or signal); polarity-sensitive - reverse connection disables protection. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust suppression of high-energy transients common in automotive load-dump and industrial relay-switching environments. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for export and OEM programs without compromising surge performance or thermal stability. |
| 150 °C maximum junction temperature | Supports deployment in under-hood automotive modules and enclosed industrial controllers where ambient temperatures exceed 85 °C. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive CMOS inputs. |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life before reflow; eliminates baking requirement and simplifies SMT manufacturing logistics. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting 5 V–12 V analog sensor outputs (e.g., pressure, temperature) in engine control units against ISO 7637-2 pulse 1 and pulse 2a transients. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between sensor output line and chassis ground, triggered only during negative-going transients. Use Value: Limits voltage excursion to ≤12.0 V during 50 A surge, preventing latch-up or gate oxide damage in downstream op-amps and ADC drivers. |
Use Scenario: Safeguarding digital input channels on programmable logic controller (PLC) modules exposed to inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Rail-to-rail TVS connected across 24 V DC input terminals, conducting surge current away from optocoupler input stages. Use Value: Clamps 10/1000 µs transients to 12.0 V while sustaining 600 W peak power, ensuring immunity to repeated switching surges without degradation. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C PD adapter outputs subjected to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND, activated only when output voltage exceeds 7.0 V due to regulation fault or ESD. Use Value: Responds in <1 ps to clamp fast ESD pulses (IEC 61000-4-2 ±8 kV contact), limiting stress on USB-PD controller and port protection ICs. |
Use Scenario: Front-end protection for RS-485 transceivers in base station backhaul links exposed to lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to local ground, absorbing common-mode surge energy before it reaches transceiver pins. Use Value: Withstands 600 W peak pulse power and maintains clamping below 12.0 V, preserving signal integrity and preventing transceiver latch-up during telecom-grade surge tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0AHE3_B/H | Same electrical specs, but RoHS-compliant with lead-based finish (E3 suffix) instead of halogen-free (HM3); higher MSL sensitivity (not MSL Level 1). | Approved for commercial-grade applications where halogen-free content is not mandated; unsuitable for automotive AEC-Q101 programs. | Select SMBJ7.0AHE3_B/H only if halogen-free material is not required and legacy E3 qualification suffices. |
| SMAJ7.0A-M3 | Lower peak pulse power (400 W vs. 600 W), smaller SMA (DO-214AC) package, same VWM/VC ratings; 20% lower surge current handling (33.3 A vs. 50.0 A). | Used where board space is constrained and surge threat level is reduced (e.g., consumer electronics vs. industrial equipment). | Choose SMAJ7.0A-M3 only when 400 W rating meets system-level surge test requirements and footprint reduction is critical. |
Compared with SMBJ7.0AHM3_B/H, SMBJ7.0AHE3_B/H offers identical protection performance but lacks halogen-free certification and MSL Level 1 rating, while SMAJ7.0A-M3 trades 33% lower surge capacity and smaller package for tighter layout integration - neither is pin-compatible due to differing package outlines (SMB vs. SMA).
Availability
SMBJ7.0AHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface designs requiring stable component supply with halogen-free compliance and AEC-Q101 readiness.
Supply support for SMBJ7.0AHM3_B/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, precision, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against inductive switching, ESD, and lightning surges is mission-critical.
FAQ
What is the clamping voltage of SMBJ7.0AHM3_B/H at its rated peak pulse current?
The SMBJ7.0AHM3_B/H has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current of 50.0 A using the standard 10/1000 µs waveform. This value is measured under controlled test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ7.0AHM3_B/H maintains this clamping performance across its full operating temperature range.
Is SMBJ7.0AHM3_B/H qualified to AEC-Q101 standards?
Yes, SMBJ7.0AHM3_B/H is AEC-Q101 qualified, as indicated by the "HM3" suffix in its ordering code - where "H" denotes AEC-Q101 qualification and "M3" confirms halogen-free, RoHS-compliant construction. This qualification validates its suitability for automotive applications including engine control, body electronics, and ADAS sensor modules requiring extended temperature operation and long-term reliability under thermal cycling and humidity exposure.
How does the HM3 suffix differ from the HE3 suffix in Vishay's SMBJ series?
The HM3 suffix in SMBJ7.0AHM3_B/H specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification, whereas HE3 indicates RoHS compliance and AEC-Q101 qualification but uses a lead-based termination finish. HM3 also carries MSL Level 1 rating (unlimited floor life), while HE3 is rated MSL Level 2. Both share identical electrical parameters, but HM3 is required for automotive programs mandating halogen-free materials and enhanced moisture resistance.
Can SMBJ7.0AHM3_B/H be used in bidirectional protection applications?
No, SMBJ7.0AHM3_B/H is a unidirectional TVS diode, identifiable by its cathode band marking and specified breakdown behavior only in reverse bias. For bidirectional protection, Vishay offers the SMBJ7.0CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities. Using SMBJ7.0AHM3_B/H in a bidirectional configuration would result in forward conduction and potential failure during positive transients.
What is the thermal resistance and recommended pad layout for SMBJ7.0AHM3_B/H?
The SMBJ7.0AHM3_B/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, as defined in the datasheet. To achieve rated power dissipation and prevent thermal runaway during repetitive surges, designers must replicate this pad area and ensure adequate copper pour and via stitching to internal ground planes. Smaller pads increase RθJA and reduce safe operating surge duty cycle.
SMBJ7.0AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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_B/H FAQ
1.How can I place an order for SMBJ7.0AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0AHM3_B/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_B/H reliable?
The price and inventory of SMBJ7.0AHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.0AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0AHM3_B/H?
SMBJ7.0AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0AHM3_B/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_B/H?
For technical support, including SMBJ7.0AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ7.0AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0AHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.0AHM3_B/H?
All SMBJ7.0AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0AHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for SMBJ7.0AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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