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Vishay General Semiconductor - Diodes Division SMBJ9.0CAHE3_B/I
- Part No.:
- SMBJ9.0CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0CAHE3_B/I.pdf
- Description:
- 600W,9.0V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,887
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Product details
Overview
SMBJ9.0CAHE3_B/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 power and signal lines. It features a 9.0 V stand-off voltage (VWM), 10.0–11.1 V breakdown voltage (VBR) at 1 mA, 15.4 V maximum clamping voltage (VC) at 39.0 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SMBJ9.0CAHE3_B/I datasheet, SMBJ9.0CAHE3_B/I pinout, SMBJ9.0CAHE3_B/I application, or SMBJ9.0CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped crowbar during ESD or lightning-induced surges, conducting when reverse voltage exceeds VBR and limiting downstream voltage to ≤15.4 V at 39 A. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
Designed for unidirectional and bidirectional configurations, SMBJ9.0CAHE3_B/I uses symmetrical avalanche structure for equal clamping in both polarities. It meets MSL Level 1 per J-STD-020, supports peak surge current up to 39 A (10/1000 µs), and exhibits 0.074 %/°C temperature coefficient of VBR - critical for stable performance across automotive ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - maximum continuous reverse operating voltage before significant conduction begins |
| VBR min/max | 10.0 V / 11.1 V at IT = 1 mA - guaranteed avalanche initiation window for reliable clamping onset |
| VC @ IPPM | 15.4 V at 39.0 A - clamped voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPPM | 600 W - peak transient energy absorption capacity under standardized surge waveform |
| ID @ VWM | <1.0 µA - negligible standby leakage, preserving signal integrity and battery life in always-on systems |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-power industrial enclosures |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient conduction path (bidirectional) | Both terminals function identically - symmetric avalanche structure allows current flow in either direction above VBR |
| Anode (Cathode) | Transient conduction path (bidirectional) | No functional distinction between terminals; device mounts without orientation constraint on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated reliability for automotive powertrain, body electronics, and ADAS sensor interfaces |
| 600 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) with margin on standard PCB layout |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or microcontroller GPIOs |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting analog/digital sensor outputs (e.g., pressure, temperature) in engine control units from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor supply and ground to clamp transients before reaching ADC front-end or signal conditioner. Use Value: Prevents latch-up or permanent damage to precision op-amps and SAR ADCs while maintaining <1 µA leakage at 9 V nominal rail. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to limit voltage to ≤15.4 V during 10/1000 µs transients. Use Value: Enables robust operation in factory-floor environments with >100,000 surge cycles without parameter drift or failure. |
| Telecom Line Interface Surge Suppression | Consumer Appliance Motor Control Board Protection |
|
Use Scenario: Safeguarding RS-485 transceiver I/O pins against EFT and lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across A/B bus lines and common-mode to ground. Use Value: Maintains signal integrity below 15.4 V clamping threshold while supporting >10⁶ surge events per device lifetime. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers on washing machine motor control boards from brush-commutator noise and power-line spikes. IC Role / Device Role / Timing Role: Localized TVS on MCU reset line and half-bridge driver enable inputs to prevent false triggering. Use Value: Eliminates field returns due to transient-induced resets, validated per IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CAHM3_B/I | Halogen-free, RoHS-compliant, AEC-Q101 qualified - identical electrical specs but different material composition | Required where halogen-free compliance is mandated (e.g., EU medical equipment, green procurement policies) | Select SMBJ9.0CAHM3_B/I when halogen-free materials are contractually required; otherwise SMBJ9.0CAHE3_B/I offers same performance at standard cost. |
| SMAJ9.0CAHE3/A | Lower PPPM (400 W), higher RθJA (140 °C/W), SMA (DO-214AC) package - smaller footprint but reduced surge handling | Suitable only for lower-energy transients (e.g., ESD-only zones, non-automotive consumer ports) | Choose SMAJ9.0CAHE3/A only if board space is constrained and surge threat level is limited to IEC 61000-4-2 ±8 kV contact discharge; SMBJ9.0CAHE3_B/I remains preferred for full IEC 61000-4-5 compliance. |
Compared with SMBJ9.0CAHM3_B/I, SMBJ9.0CAHE3_B/I provides identical surge protection performance with standard RoHS compliance; versus SMAJ9.0CAHE3/A, it delivers 50 % higher peak pulse power and superior thermal dissipation in a slightly larger SMB package - making it the optimal choice for automotive and industrial applications demanding robust, AEC-Q101-validated protection.
Availability
SMBJ9.0CAHE3_B/I 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, long-term lifecycle support, and AEC-Q101-qualified surge protection.
Supply support for SMBJ9.0CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure, engineered to meet stringent surge immunity standards (IEC 61000-4-5, ISO 7637-2) with AEC-Q101 qualification and MSL Level 1 process control.
FAQ
What does the "CA" suffix indicate in SMBJ9.0CAHE3_B/I?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ9.0CAHE3_B/I provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ9.0A), it has no cathode marking and functions identically regardless of terminal orientation, making it ideal for AC signal lines, differential buses, and floating power rails where polarity is undefined or reversible.
Is SMBJ9.0CAHE3_B/I AEC-Q101 qualified?
Yes, SMBJ9.0CAHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code "HE3" suffix and documentation (Document Number: 88392, Revision: 09-Jan-2024). This qualification validates its reliability for automotive applications including engine control, body electronics, and ADAS sensor interfaces under extended temperature cycling, humidity, and mechanical stress conditions.
What is the maximum clamping voltage of SMBJ9.0CAHE3_B/I and at what current is it specified?
The maximum clamping voltage (VC) of SMBJ9.0CAHE3_B/I is 15.4 V, measured at a peak pulse current (IPPM) of 39.0 A 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, ensuring downstream components like microcontrollers or transceivers remain within safe operating limits.
How does SMBJ9.0CAHE3_B/I differ from unidirectional SMBJ9.0AHE3_B/I?
SMBJ9.0CAHE3_B/I is bidirectional with symmetrical VBR (10.0–11.1 V) and no polarity marking, while SMBJ9.0AHE3_B/I is unidirectional with cathode band marking and forward voltage drop (VF ≤ 3.5 V at 50 A). The bidirectional version supports AC-coupled or floating circuits; the unidirectional variant adds DC blocking capability and is used where forward conduction must be controlled, such as in DC power rail protection with polarity-sensitive loads.
What PCB pad layout is recommended for optimal thermal performance of SMBJ9.0CAHE3_B/I?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for SMBJ9.0CAHE3_B/I to achieve the rated RθJA of 100 °C/W. Using this layout ensures adequate heat dissipation during repetitive surge events and maintains junction temperature within the –55 °C to +150 °C operating range. Smaller pads increase thermal resistance and risk derating of peak pulse power capability.
SMBJ9.0CAHE3_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:
- -
- 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)
SMBJ9.0CAHE3_B/I FAQ
1.How can I place an order for SMBJ9.0CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0CAHE3_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 SMBJ9.0CAHE3_B/I reliable?
The price and inventory of SMBJ9.0CAHE3_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 SMBJ9.0CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ9.0CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0CAHE3_B/I?
SMBJ9.0CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0CAHE3_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 SMBJ9.0CAHE3_B/I?
For technical support, including SMBJ9.0CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ9.0CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0CAHE3_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 SMBJ9.0CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ9.0CAHE3_B/I?
All SMBJ9.0CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0CAHE3_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 SMBJ9.0CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ9.0CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0CAHE3_B/I Tags
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