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Vishay General Semiconductor - Diodes Division SMBJ9.0CAHM3_A/H
- Part No.:
- SMBJ9.0CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0CAHM3_A/H.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ9.0CAHM3_A/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 9.0 V stand-off voltage (VWM), 15.4 V maximum clamping voltage (VC) at 39.0 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the SMBJ9.0CAHM3_A/H datasheet, SMBJ9.0CAHM3_A/H pinout, SMBJ9.0CAHM3_A/H application, or SMBJ9.0CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.71), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the 0.074 %/°C temperature coefficient of VBR supports predictable performance across -55 °C to +150 °C operating range.
The device delivers 600 W transient suppression under standardized 10/1000 µs surge conditions with 0.01 % duty cycle, and exhibits fast response time (<1.0 ns) to limit overvoltage exposure before downstream components are damaged. Thermal resistance is specified at RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting reliable operation under repetitive surge stress when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 10.0 V / 11.1 V at IT = 1.0 mA - Confirmed breakdown voltage window ensuring consistent turn-on across production lots. |
| VC @ IPPM | 15.4 V at 39.0 A - Clamped voltage during 600 W transient; determines maximum stress imposed on protected circuitry. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates suitability for IEC 61000-4-5 Level 4 surges. |
| IPPM | 39.0 A - Corresponding peak surge current at VC; used to size PCB trace widths and verify system-level energy absorption. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with J-STD-020 MSL level 1 reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point in negative half-cycle | One terminal of symmetrical PN junction; conducts during reverse polarity surge events. |
| Cathode | Transient current entry point in positive half-cycle | Second terminal of symmetrical PN junction; conducts during forward polarity surge events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity constraints. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for industrial and consumer products sold in EU, China, and North America markets. |
| 600 W peak pulse power | Supports robust immunity against lightning-induced surges (IEC 61000-4-5) and inductive switching transients in motor drives and power supplies. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs and ICs. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching PHY layer. Use Value: Prevents false triggering and permanent damage to 3.3 V/5 V sensor signal chains while maintaining signal integrity during normal operation. |
Use Scenario: Safeguarding digital input/output terminals of programmable logic controllers exposed to relay coil kickback and field wiring surges. IC Role / Device Role / Timing Role: Primary transient suppressor on 24 V DC I/O lines, positioned upstream of optocouplers and level-shifting circuitry. Use Value: Eliminates need for external series impedance or RC filtering, preserving fast edge response for high-speed discrete I/O signals. |
| Telecom Line Interface | Consumer Power Adapter Output |
|
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller inputs from induced surges on outdoor cabling in network switches and base stations. IC Role / Device Role / Timing Role: Secondary-level protector after gas discharge tube (GDT), clamping residual transients to sub-16 V levels. Use Value: Ensures compliance with ITU-T K.21 basic protection level while avoiding interference with 100BASE-TX signal timing. |
Use Scenario: Suppressing output overvoltage spikes caused by transformer leakage inductance and synchronous rectifier turn-off in USB-C PD adapters. IC Role / Device Role / Timing Role: Fast-acting clamp across secondary-side output capacitor to prevent overvoltage shutdown of USB-PD controller. Use Value: Maintains regulated 9 V/15 V/20 V output stability during dynamic load transitions without requiring additional feedback compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CAHE3_A/H | Same electrical specs, but RoHS-compliant without halogen-free certification; uses standard SnPb-free matte tin plating. | Approved for commercial-grade industrial equipment where halogen-free mandate is not enforced. | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 is not needed. |
| SMAJ9.0CAHM3_A/H | Lower 400 W PPPM, higher VC = 17.5 V at 25.0 A; same SMB-like SMA (DO-214AC) package with smaller 4.5 mm × 2.7 mm footprint. | Suitable for space-constrained consumer electronics with lower surge immunity requirements (e.g., IEC 61000-4-5 Level 2). | Choose only if board area is critical and 600 W rating is unnecessary; verify thermal derating with RθJA = 140 °C/W. |
Compared with SMBJ9.0CAHE3_A/H and SMAJ9.0CAHM3_A/H, SMBJ9.0CAHM3_A/H provides superior surge robustness (600 W vs. 400 W), tighter clamping (15.4 V vs. 17.5 V), and automotive-grade qualification - making it the preferred choice for mission-critical industrial and automotive designs demanding highest reliability.
Availability
SMBJ9.0CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection circuits, and consumer power adapter outputs requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ9.0CAHM3_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, 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 automation, and telecommunications infrastructure where robust ESD and surge immunity are mandatory.
FAQ
What is the clamping voltage of SMBJ9.0CAHM3_A/H at its rated peak pulse current?
The SMBJ9.0CAHM3_A/H has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak pulse current of 39.0 A using the standard 10/1000 µs waveform. This value is measured under defined test conditions per JEDEC standards and reflects worst-case voltage seen by protected circuitry during surge events. The SMBJ9.0CAHM3_A/H maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMBJ9.0CAHM3_A/H suitable for automotive applications?
Yes, SMBJ9.0CAHM3_A/H is AEC-Q101 qualified and specifically designed for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces. Its halogen-free, RoHS-compliant construction and guaranteed performance across -55 °C to +150 °C junction temperature meet stringent automotive reliability requirements. The SMBJ9.0CAHM3_A/H is marked with "HM3" suffix indicating halogen-free AEC-Q101 qualification per Vishay's ordering nomenclature.
How does the bidirectional nature of SMBJ9.0CAHM3_A/H affect its circuit placement?
The SMBJ9.0CAHM3_A/H has no polarity marking and functions identically in both directions, allowing placement across any two-node connection without regard to signal polarity - ideal for protecting AC-coupled lines, differential buses like RS-485 or CAN, or ungrounded power rails. Unlike unidirectional TVS diodes, the SMBJ9.0CAHM3_A/H eliminates orientation errors during automated assembly and avoids the need for dual-diode configurations in symmetric protection schemes.
What is the thermal resistance of SMBJ9.0CAHM3_A/H, and how does it impact layout design?
The SMBJ9.0CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB material and natural convection cooling. To maintain safe junction temperatures during repetitive surges, designers must ensure adequate copper area and avoid excessive trace length between the SMBJ9.0CAHM3_A/H and ground/power planes per Vishay's mounting recommendations.
Does SMBJ9.0CAHM3_A/H meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMBJ9.0CAHM3_A/H meets MSL level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions (<30 °C / 60% RH) without baking prior to soldering. Its maximum peak reflow temperature is rated at 260 °C, fully compatible with standard lead-free SAC305 process profiles. The device's matte tin-plated leads comply with J-STD-002 and JESD22-B102 for solderability, and whisker resistance is certified to JESD201 Class 2.
SMBJ9.0CAHM3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 39A
- 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)
SMBJ9.0CAHM3_A/H FAQ
1.How can I place an order for SMBJ9.0CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0CAHM3_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 SMBJ9.0CAHM3_A/H reliable?
The price and inventory of SMBJ9.0CAHM3_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 SMBJ9.0CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ9.0CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0CAHM3_A/H?
SMBJ9.0CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0CAHM3_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 SMBJ9.0CAHM3_A/H?
For technical support, including SMBJ9.0CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ9.0CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0CAHM3_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 SMBJ9.0CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ9.0CAHM3_A/H?
All SMBJ9.0CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0CAHM3_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 SMBJ9.0CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ9.0CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0CAHM3_A/H Tags
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