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Vishay General Semiconductor - Diodes Division SMBJ9.0CAHE3_A/I
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- Part No.:
- SMBJ9.0CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0CAHE3_A/I.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,403
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Product details
Overview
SMBJ9.0CAHE3_A/I 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, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ9.0CAHE3_A/I datasheet, SMBJ9.0CAHE3_A/I pinout, SMBJ9.0CAHE3_A/I application, or SMBJ9.0CAHE3_A/I equivalent, this device is selected for robust bidirectional surge protection in automotive-grade (AEC-Q101 qualified), industrial, and telecom systems where low clamping voltage, fast response (<1 ns), and stable thermal performance up to 150 °C junction temperature are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 10.0 V and 11.1 V at 1 mA test current. Its low incremental surge resistance ensures minimal voltage overshoot during transient events, while the glass-passivated junction delivers consistent avalanche performance over lifetime.
The device complies with AEC-Q101 stress testing for automotive use and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation under repetitive surge conditions when mounted on recommended 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 9.0 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 10.0–11.1 V at 1 mA - Ensures reliable, repeatable avalanche initiation within tight tolerance for predictable protection onset. |
| VC (Clamping Voltage) | 15.4 V at 39.0 A (10/1000 µs) - Limits transient voltage seen by downstream ICs to safe levels during surge events. |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients without failure; validated per IEC 61000-4-5 and ISO 7637-2 standards. |
| IPPM (Peak Pulse Current) | 39.0 A - Withstands single or repetitive surges up to this amplitude when derated above 25 °C ambient. |
| TJmax | 150 °C - Enables deployment in under-hood automotive or high-temperature industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount footprint compatible with automated assembly; 0.220" × 0.155" body with matte tin-plated leads. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals with identical electrical behavior in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts bidirectionally upon exceeding VBR, clamping voltage regardless of polarity. |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and heat dissipation path via soldered copper pad area (5.0 mm × 5.0 mm recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional suppression | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - e.g., RS-485, CAN, USB D+/D−. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics, supporting long-term reliability under thermal cycling and humidity bias. |
| 600 W peak pulse power | Handles high-energy transients from inductive load switching (e.g., solenoid drivers) and lightning-induced surges per IEC 61000-4-5 Level 3. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V or 5 V logic interfaces where margin is constrained. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak, eliminating bake requirements prior to assembly. |
Applications
| Automotive Sensor Interface Protection | Industrial RS-485 Communication Line |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential sensor outputs to limit transients to <15.4 V during 10/1000 µs surges. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends while maintaining signal integrity under repeated 39 A surge events. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Placed line-to-line (A–B) and line-to-ground to suppress common-mode and differential-mode transients simultaneously. Use Value: Maintains data integrity at 10 Mbps by limiting bus voltage excursions to ≤15.4 V, avoiding false triggering or receiver saturation. |
| Telecom DSL Line Protection | Consumer Appliance Motor Control Board |
|
Use Scenario: Shielding ADSL/VDSL line drivers from lightning-induced surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: Primary protection stage before gas discharge tube (GDT) secondary arrestor; absorbs initial 600 W energy spike. Use Value: Reduces let-through voltage to GDT stage, extending system-level surge withstand capability to IEC 61000-4-5 4 kV (line-earth). |
Use Scenario: Guarding microcontroller GPIOs and gate drivers on washing machine main control boards against relay coil flyback. IC Role / Device Role / Timing Role: Mounted directly at relay coil terminals to clamp 100 V+ flyback spikes within nanoseconds. Use Value: Eliminates need for snubber RC networks, reducing BOM count and PCB space while ensuring >100,000-cycle relay reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA-E3/52 | Commercial-grade (non-AEC-Q101); same VWM, VC, and PPPM; RoHS-compliant but not automotive-qualified. | Limited to non-automotive industrial or consumer applications where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive qualification requirements and thermal cycling validation is not needed. |
| SMCJ9.0CAHE3_A/I | Same electrical specs but in larger SMC (DO-214AB) package; 1500 W PPPM, higher IPPM (64.5 A), RθJA = 40 °C/W. | Better suited for high-surge environments (e.g., power supply inputs) where board space allows larger footprint. | Choose when surge energy exceeds 600 W or when lower thermal resistance is required for sustained duty cycles. |
Compared with SMBJ9.0CAHE3_A/I, the E3/52 variant offers identical protection performance at lower cost but lacks automotive qualification, while the SMCJ9.0CAHE3_A/I provides higher surge capacity and better thermal management at the expense of PCB area - making SMBJ9.0CAHE3_A/I optimal for space-constrained AEC-Q101 designs.
Availability
SMBJ9.0CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom DSL line protection requiring stable component supply, AEC-Q101 compliance, and consistent 600 W surge handling.
Supply support for SMBJ9.0CAHE3_A/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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series was developed specifically for high-reliability transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and communications markets where bidirectional clamping and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMBJ9.0CAHE3_A/I at its rated peak pulse current?
The SMBJ9.0CAHE3_A/I has a maximum clamping voltage (VC) of 15.4 V at 39.0 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ9.0CAHE3_A/I maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMBJ9.0CAHE3_A/I suitable for automotive applications?
Yes, SMBJ9.0CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use, as indicated by the "HE3" suffix and ordering code "_A/I". It undergoes rigorous stress testing including temperature cycling, humidity bias, and mechanical shock - making it appropriate for engine control units, body electronics, and ADAS sensor modules where reliability under harsh conditions is essential. The SMBJ9.0CAHE3_A/I meets all applicable AEC-Q101 test requirements per Vishay's certification documentation.
How does the bidirectional design of SMBJ9.0CAHE3_A/I affect its placement on a PCB?
The SMBJ9.0CAHE3_A/I has no polarity marking and functions identically in both directions, so orientation on the PCB is not critical. It can be placed across any two nodes requiring symmetrical overvoltage protection - such as differential signal pairs (e.g., CAN_H/CAN_L) or AC-coupled lines - without concern for anode/cathode alignment. This simplifies layout, reduces assembly errors, and eliminates the need for silkscreen polarity indicators. The SMBJ9.0CAHE3_A/I's DO-214AA package supports standard pick-and-place processes with no special handling.
What is the maximum operating temperature for SMBJ9.0CAHE3_A/I?
The SMBJ9.0CAHE3_A/I has a maximum junction temperature (TJmax) of +150 °C and an operating storage temperature range of -55 °C to +150 °C. Its thermal resistance values - RθJA = 100 °C/W and RθJL = 20 °C/W - allow reliable operation in high-temperature environments when mounted on the recommended 5.0 mm × 5.0 mm copper pads. Derating curves in the Vishay datasheet (Document 88392) specify allowable pulse repetition rates above 25 °C ambient, ensuring the SMBJ9.0CAHE3_A/I remains within safe thermal limits during sustained surge activity.
Does SMBJ9.0CAHE3_A/I meet industry surge immunity standards?
Yes, the SMBJ9.0CAHE3_A/I is engineered to meet key surge immunity standards including IEC 61000-4-5 (lightning surge, 4 kV line-earth), ISO 7637-2 (automotive transient pulses), and IEC 61000-4-2 (ESD, ±30 kV air, ±20 kV contact). Its 600 W peak pulse power rating and 15.4 V clamping voltage enable system-level compliance when combined with proper PCB layout and secondary protection. Vishay validates the SMBJ9.0CAHE3_A/I against these standards using standardized 10/1000 µs waveforms and defined mounting conditions.
SMBJ9.0CAHE3_A/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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ9.0CAHE3_A/I FAQ
1.How can I place an order for SMBJ9.0CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0CAHE3_A/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 SMBJ9.0CAHE3_A/I reliable?
The price and inventory of SMBJ9.0CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ9.0CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ9.0CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0CAHE3_A/I?
SMBJ9.0CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0CAHE3_A/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 SMBJ9.0CAHE3_A/I?
For technical support, including SMBJ9.0CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ9.0CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0CAHE3_A/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 SMBJ9.0CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ9.0CAHE3_A/I?
All SMBJ9.0CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0CAHE3_A/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 SMBJ9.0CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ9.0CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0CAHE3_A/I Tags
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Diodes Incorporated
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