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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHM3_B/H
- Part No.:
- SMBJ7.5CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHM3_B/H.pdf
- Description:
- 600W,7.5V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,399
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Product details
Overview
SMBJ7.5CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, and clamps to ≤12.9 V at 46.5 A peak pulse current (IPPM) under 10/1000 µs waveform - used for protecting MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5CAHM3_B/H datasheet, SMBJ7.5CAHM3_B/H pinout, SMBJ7.5CAHM3_B/H application, or SMBJ7.5CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, 600 W peak pulse power rating, low clamping ratio (VC/VBR ≈ 1.55), AEC-Q101 qualification status, and halogen-free RoHS-compliant construction per HM3 suffix.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical avalanche breakdown in both directions, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5% typical) and low leakage (<100 µA at VWM), while the 100 °C/W junction-to-ambient thermal resistance supports operation up to +150 °C junction temperature.
The SMBJ7.5CAHM3_B/H delivers 600 W peak pulse power handling per 10/1000 µs waveform at 0.01% duty cycle, with fast response time (<1.0 ps) and low incremental surge resistance - critical for suppressing ESD, lightning-induced surges, and inductive switching transients in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1.0 mA - guaranteed avalanche onset range; ensures reliable triggering during overvoltage events |
| VC (Clamping Voltage) | ≤12.9 V at 46.5 A IPPM - limits downstream voltage stress during surge; clamping ratio = 1.55 typical |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity for 10/1000 µs transients; enables robust protection against IEC 61000-4-5 Level 3/4 surges |
| IPPM (Peak Pulse Current) | 46.5 A - maximum non-repetitive surge current supported; derates above 25 °C ambient per Fig. 2 |
| TJmax | +150 °C - maximum junction temperature; allows use in high-temperature industrial environments with proper layout |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement for thermal performance |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional operation | Connected to protected line (e.g., RS-485 A/B, USB D+/D−); symmetric conduction path with cathode |
| Cathode | Current exit terminal in forward bias; common node in bidirectional operation | Connected to protected line (e.g., RS-485 A/B, USB D+/D−); forms symmetrical clamp with anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC or differential signals (e.g., CAN bus, RS-485) without external polarity management |
| 600 W peak pulse power | Supports IEC 61000-4-5 4 kV surge testing with margin when mounted on 5.0 mm × 5.0 mm copper pads |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for industrial and consumer electronics without compromising surge performance |
| Low clamping voltage (12.9 V) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage in 5 V/3.3 V systems |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protecting gate drivers and microcontroller I/O pins from inductive kickback during relay or solenoid switching in PLCs and motor controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed across MOSFET gate-source or MCU GPIO lines to clamp transients before they reach silicon. Use Value: Prevents false triggering and permanent damage by limiting voltage excursions to ≤12.9 V during 46.5 A surges, preserving system uptime and functional safety integrity. |
Use Scenario: Safeguarding LIN bus transceivers and sensor interfaces (e.g., temperature, position) against load dump and jump-start transients in BCMs. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN data line and supply rail to absorb coupled surges while maintaining signal integrity. Use Value: Enables AEC-Q101-compliant design with 7.5 V VWM matching typical 5 V/12 V rail margins and 12.9 V clamping compatible with 16 V max-rated transceivers. |
| Telecom Power Supply Inputs | Consumer USB-C Port Protection |
Use Scenario: Front-end surge suppression on AC/DC adapter inputs and DC distribution rails exposed to lightning-induced surges in base stations and PoE injectors. IC Role / Device Role / Timing Role: Primary-level TVS shunting transient energy to ground before it propagates into DC-DC converters and PMICs. Use Value: Delivers 600 W pulse handling with <1 ns response to meet IEC 61000-4-5 Ed. 3 Class 3 immunity without derating due to thermal limitations. |
Use Scenario: Differential-line protection on USB-C CC and SBU pins against ESD and cable-insertion transients in portable devices. IC Role / Device Role / Timing Role: Bidirectional clamp between differential pairs to prevent asymmetrical voltage stress and data corruption. Use Value: Symmetric 7.5 V standoff and 12.9 V clamping ensure compatibility with USB-C VCONN and sideband use signaling voltages while meeting IEC 61000-4-2 ±15 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CAHE3_B/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial/industrial use where automotive qualification is not required | Select when cost sensitivity outweighs halogen-free or automotive compliance needs |
| SMAJ7.5CAHM3 | Lower 400 W PPPM; SMA package (smaller footprint, higher RθJA = 140 °C/W) | Acceptable for lower-energy transients or space-constrained designs with reduced thermal mass | Choose only if board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2 |
Compared with SMBJ7.5CAHE3_B/H, the SMBJ7.5CAHM3_B/H adds halogen-free construction and AEC-Q101 qualification without sacrificing clamping performance; versus SMAJ7.5CAHM3, it provides 50% higher surge power handling and superior thermal dissipation in the larger SMB outline - making it optimal for demanding industrial and automotive front-end protection.
Availability
SMBJ7.5CAHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer USB-C port protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ7.5CAHM3_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, efficiency, and application-specific optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness and qualification compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ7.5CAHM3_B/H?
The "CA" suffix denotes a bidirectional configuration - meaning the SMBJ7.5CAHM3_B/H conducts and clamps symmetrically in both polarities, unlike unidirectional "A" variants. This makes SMBJ7.5CAHM3_B/H ideal for protecting AC-coupled lines such as RS-485, CAN, or differential USB signals without requiring polarity-aware placement.
Is SMBJ7.5CAHM3_B/H suitable for automotive applications?
Yes - the "HM3" suffix confirms SMBJ7.5CAHM3_B/H is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It has undergone stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D, making SMBJ7.5CAHM3_B/H appropriate for under-hood and body electronics where reliability under thermal and electrical stress is critical.
What is the maximum clamping voltage of SMBJ7.5CAHM3_B/H at rated surge current?
The SMBJ7.5CAHM3_B/H clamps to a maximum of 12.9 V at its rated peak pulse current of 46.5 A (10/1000 µs waveform). This value is measured per JEDEC standards and guarantees worst-case voltage stress on downstream components, enabling safe interface with 5 V or 3.3 V logic circuits when properly laid out.
How does the SMB (DO-214AA) package of SMBJ7.5CAHM3_B/H affect thermal performance?
The SMB package of SMBJ7.5CAHM3_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. This allows SMBJ7.5CAHM3_B/H to sustain full 600 W pulse power without exceeding TJmax = +150 °C, provided PCB layout follows Vishay's recommended pad dimensions and thermal relief guidelines.
Can SMBJ7.5CAHM3_B/H replace SMBJ7.5A in a design?
No - SMBJ7.5CAHM3_B/H is bidirectional while SMBJ7.5A is unidirectional, so direct substitution requires circuit review. SMBJ7.5A has a cathode band and conducts only in reverse bias; replacing it with SMBJ7.5CAHM3_B/H may cause unintended conduction in DC-biased lines. Use SMBJ7.5CAHM3_B/H only where symmetrical clamping is required and polarity is undefined or alternating.
SMBJ7.5CAHM3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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)
SMBJ7.5CAHM3_B/H FAQ
1.How can I place an order for SMBJ7.5CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_B/H reliable?
The price and inventory of SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHM3_B/H?
SMBJ7.5CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_B/H?
For technical support, including SMBJ7.5CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ7.5CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHM3_B/H?
All SMBJ7.5CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHM3_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 SMBJ7.5CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHM3_B/H Tags
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