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Vishay General Semiconductor - Diodes Division SMBJ7.0AHM3_B/I
- Part No.:
- SMBJ7.0AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0AHM3_B/I.pdf
- Description:
- 600W,7.0V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,290
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Product details
Overview
SMBJ7.0AHM3_B/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 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 (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ7.0AHM3_B/I datasheet, SMBJ7.0AHM3_B/I pinout, SMBJ7.0AHM3_B/I application, or SMBJ7.0AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status (via HM3 suffix), halogen-free RoHS compliance, thermal resistance (RθJA = 100 °C/W), and clamping performance under repetitive 0.01% duty cycle surges.
Technical Context
This TVS diode operates as a voltage-clamping protection device placed in parallel with sensitive circuit nodes. Its glass-passivated junction enables fast response time (<1 ps), low incremental surge resistance, and stable breakdown behavior across -55 °C to +150 °C operating junction temperature range.
The SMBJ7.0AHM3_B/I is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits 0.065 %/°C temperature coefficient of VBR - ensuring predictable voltage threshold shift over temperature in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse working voltage before clamping begins; sets safe operating margin below system rail. |
| VBR (min/max) | 7.78 V / 8.60 V at IT = 10 mA - Confirmed breakdown range ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 12.0 V at 50.0 A - Clamping voltage limits downstream component stress during 10/1000 µs surge events. |
| PPPM | 600 W - Peak pulse power handling capability with 0.01% duty cycle; supports IEC 61000-4-5 Level 4 surge immunity designs. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs PCB thermal layout requirements. |
| TJ max. | +150 °C - Maximum junction temperature rating enables use in under-hood automotive and high-temperature industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection terminal | Connected to ground or lower-potential node; completes clamping path during positive transients on cathode side. |
| Cathode | High-side connection terminal | Connected to protected line (e.g., 12 V rail or signal input); conducts surge current to ground when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 combination wave surges up to 4 kV without derating on standard PCB pads. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and body electronics where reliability under thermal cycling and vibration is critical. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for industrial and consumer electronics sold in EU, China, and other regulated markets. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces adjacent to higher-voltage rails. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture sensitivity concerns; no baking required prior to assembly. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V CAN bus interface inputs from load dump and inductive switching transients in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between CAN_H line and chassis ground to clamp transients above 13.5 V while remaining inert during normal operation. Use Value: Prevents damage to CAN transceivers (e.g., TJA1042) by limiting peak voltage to ≤12.0 V during 10/1000 µs surges up to 50 A. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input optocoupler anode-cathode to absorb energy before it reaches isolation barrier. Use Value: Maintains functional safety integrity by preventing false triggering or latch-up in input conditioning circuits during 1 kV/500 A surge events. |
| Consumer Appliance Motor Drive Board | Telecom Power Supply Input Stage |
|
Use Scenario: Shielding microcontroller GPIOs and gate drivers from back-EMF spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Localized clamping device mounted directly at motor driver IC supply pins to minimize inductive loop area and response delay. Use Value: Reduces risk of MCU reset or gate oxide failure by limiting transient overvoltage to <12.0 V within <1 ps of event onset. |
Use Scenario: Front-end surge suppression on AC/DC adapter primary-side rectifier output feeding 48 V telecom systems. IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV and fuse, providing precise clamping to protect downstream DC-DC controllers from residual overshoot. Use Value: Extends lifetime of buck controller ICs (e.g., LM5017) by reducing cumulative voltage stress during repeated lightning-induced surges. |
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_B/I | Same electrical specs, but RoHS-compliant (non-halogen-free) and commercial-grade only - lacks AEC-Q101 qualification. | Approved for industrial and consumer use; not certified for automotive under hood or chassis locations. | Select when halogen-free requirement is waived and automotive qualification is unnecessary. |
| SMAJ7.0A-M3 | Lower PPPM (400 W), larger VBR tolerance (6.67–7.37 V), SMA package (smaller footprint, higher RθJA = 140 °C/W). | Suitable for space-constrained boards with lower surge threat levels (e.g., USB port protection), not for 600 W IEC 61000-4-5 compliance. | Choose only if board area is critical and peak surge energy does not exceed 400 W capability. |
Compared with SMBJ7.0AHM3_B/I, the HE3 variant trades halogen-free construction and automotive qualification for cost savings in commercial applications, while the SMAJ7.0A-M3 reduces surge capacity and thermal performance to fit tighter layouts - neither offers drop-in replacement without verifying layout, thermal, and compliance requirements.
Availability
SMBJ7.0AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, consumer appliance motor controls, and telecom power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ7.0AHM3_B/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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, halogen-free compliance, and repeatable clamping performance are mandatory.
FAQ
What is the polarity configuration of SMBJ7.0AHM3_B/I?
The SMBJ7.0AHM3_B/I is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the SMB (DO-214AA) package body. During normal operation, it blocks reverse current up to 7.0 V (VWM); when a positive transient exceeds its breakdown voltage (7.78–8.60 V), it conducts from cathode to anode to clamp the voltage. This configuration makes SMBJ7.0AHM3_B/I ideal for DC rail protection where polarity is fixed.
Does SMBJ7.0AHM3_B/I meet AEC-Q101 qualification standards?
Yes, SMBJ7.0AHM3_B/I meets AEC-Q101 qualification requirements for automotive discrete semiconductors. The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. This certification covers stress tests including temperature cycling, humidity bias HAST, mechanical shock, and high-temperature operating life - confirming suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SMBJ7.0AHM3_B/I under surge conditions?
The maximum clamping voltage (VC) of SMBJ7.0AHM3_B/I is 12.0 V, measured at 50.0 A peak pulse current (IPPM) using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is critical for ensuring compatibility with downstream components rated for ≤13.2 V absolute maximum ratings.
Can SMBJ7.0AHM3_B/I be used in bidirectional signal line protection?
No, SMBJ7.0AHM3_B/I is strictly unidirectional and unsuitable for bidirectional signal lines such as RS-485 or CAN without external circuitry. For bidirectional protection, Vishay specifies parts with "CA" suffix (e.g., SMBJ7.0CA). Using SMBJ7.0AHM3_B/I on AC or dual-polarity signals would result in forward conduction during negative half-cycles, causing malfunction or damage. Always match polarity type to system signal architecture.
What PCB pad layout is recommended for optimal thermal performance of SMBJ7.0AHM3_B/I?
Vishay specifies that SMBJ7.0AHM3_B/I achieves its rated RθJA of 100 °C/W when mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal. To improve thermal dissipation, increase pad area or add internal/external thermal vias to inner ground/power planes. Avoid narrow traces between the device and copper mass - these degrade surge current handling and raise junction temperature during repetitive events.
SMBJ7.0AHM3_B/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:
- 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/I FAQ
1.How can I place an order for SMBJ7.0AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0AHM3_B/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_B/I reliable?
The price and inventory of SMBJ7.0AHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.0AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0AHM3_B/I?
SMBJ7.0AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0AHM3_B/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_B/I?
For technical support, including SMBJ7.0AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ7.0AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0AHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.0AHM3_B/I?
All SMBJ7.0AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0AHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for SMBJ7.0AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0AHM3_B/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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