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Vishay General Semiconductor - Diodes Division SMB8J9.0CAHE3_A/H
- Part No.:
- SMB8J9.0CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J9.0CAHE3_A/H.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,165
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Product details
Overview
SMB8J9.0CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 9.0 V stand-off voltage (VWM), 15.4 V maximum clamping voltage (VC) at 20 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J9.0CAHE3_A/H datasheet, SMB8J9.0CAHE3_A/H pinout, SMB8J9.0CAHE3_A/H application, or SMB8J9.0CAHE3_A/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping behavior, low leakage (<1 µA at VWM), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its breakdown threshold (VBR min = 10.0 V, max = 11.1 V at 1.0 mA). Its bidirectional architecture enables symmetric clamping on AC-coupled or differential lines without polarity sensitivity.
Constructed with a glass-passivated silicon junction and housed in an UL 94 V-0 compliant SMB package, SMB8J9.0CAHE3_A/H sustains repetitive surges up to 150 °C junction temperature and meets JESD201 Class 2 whisker resistance. It is rated for 20 A IPPM under 10/1000 µs waveform with 51.9 Ω incremental surge resistance derived from VC/IPPM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 10.0 / 11.1 V at 1.0 mA - Ensures reliable triggering above system nominal voltage with margin |
| VC @ IPPM | 15.4 V at 20 A - Limits downstream voltage stress during 10/1000 µs surge events |
| PPPM | 800 W - Sustains high-energy transients common in automotive load-dump or inductive switching |
| ID @ VWM | <1.0 µA - Minimizes standby power loss and avoids false triggering in low-current circuits |
| TJ max. | +150 °C - Supports operation in under-hood automotive environments and industrial enclosures |
| RθJA | 72 °C/W - Requires minimum 5.0 mm × 5.0 mm copper pad per terminal for thermal derating compliance |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (1) | Transient current input/output node | Either terminal accepts surge current; bidirectional conduction eliminates orientation constraints during layout |
| Anode/Cathode (2) | Transient current return path | Completes low-inductance shunt path to ground or reference rail; both pins must be routed with equal impedance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass-passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without pre-baking |
| UL 94 V-0 molding compound | Meets flammability requirements for safety-critical industrial and transportation systems |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and eliminates whisker risk per JESD201 Class 2 |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/FlexRay transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from ISO 7637-2 pulses and ESD. IC Role / Device Role / Timing Role: Bidirectional shunt clamp that diverts surge energy away from sensitive analog front-ends and communication ICs. Use Value: Maintains signal integrity by clamping transients to ≤15.4 V while drawing <1 µA leakage at 9.0 V nominal bus voltage. | Use Scenario: Safeguarding 24 V DC digital input modules against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Fast-response overvoltage limiter placed across input terminals prior to optocoupler or Schmitt trigger input stage. Use Value: Withstands 800 W peak pulse power and 20 A surge current without degradation, enabling >100,000 surge cycles in typical factory environments. |
| Consumer USB Port ESD Protection | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB 2.0 data lines (D+/D−) where primary TVS is integrated into the connector. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp that activates only during >10.0 V excursions, preserving signal rise/fall times. Use Value: Delivers sub-nanosecond response and <1 µA leakage, avoiding signal distortion or standby current penalties in battery-powered devices. | Use Scenario: Front-end protection of Ethernet PHY or ADSL line drivers exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: High-power shunt element absorbing multi-kA induced currents before they reach transformer-coupled isolation stages. Use Value: Clamps 10/1000 µs surges to 15.4 V with 51.9 Ω dynamic impedance, limiting energy transfer into downstream circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J9.0CAHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification | No functional difference; selected when halogen-free material compliance is mandated | Choose SMB8J9.0CAHM3_A/H if BOM requires halogen-free construction per IEC 61249-2-21 |
| SMBJ9.0CAHE3_A/H | Same VWM/VBR/VC ratings but rated for 1000 W PPPM (unidirectional only); bidirectional version not offered | Not suitable for AC or differential-line protection; limited to unidirectional DC rails | Select SMB8J9.0CAHE3_A/H only for bidirectional signal paths; SMBJ9.0CAHE3_A/H is not a drop-in replacement |
Compared with SMB8J9.0CAHE3_A/H, the HM3 variant offers identical protection performance with halogen-free packaging, while SMBJ9.0CAHE3_A/H provides higher 1000 W unidirectional power rating but lacks bidirectional capability - making it unsuitable for symmetric surge environments like RS-485 or CAN.
Availability
SMB8J9.0CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, consumer USB port ESD hardening, and telecom line card surge suppression requiring stable component supply and AEC-Q101 traceability.
Supply support for SMB8J9.0CAHE3_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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and TVS devices for high-reliability applications.
The SMB8J series belongs to Vishay's TRANSZORB® high-power TVS family, engineered specifically for automotive and industrial surge immunity where AEC-Q101 qualification, low clamping voltage, and repeatable pulse handling are mandatory.
FAQ
What is the clamping voltage of SMB8J9.0CAHE3_A/H at its rated peak pulse current?
The SMB8J9.0CAHE3_A/H has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated 20 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TJ = 25 °C and ensures downstream components experience controlled overvoltage stress during transient events. The SMB8J9.0CAHE3_A/H maintains this clamping performance across its full operating temperature range, supported by its 72 °C/W junction-to-ambient thermal resistance.
Is SMB8J9.0CAHE3_A/H suitable for bidirectional signal lines such as RS-485 or CAN bus?
Yes, SMB8J9.0CAHE3_A/H is explicitly designed as a bidirectional TVS diode, making it appropriate for protecting differential or AC-coupled signal lines including RS-485, CAN, LIN, and USB D+/D−. Its symmetrical breakdown (VBR min/max = 10.0/11.1 V) and absence of polarity marking allow direct placement across any two-node interface without orientation concerns. The SMB8J9.0CAHE3_A/H delivers consistent 15.4 V clamping in either direction, critical for maintaining signal integrity in full-duplex communication links.
Does SMB8J9.0CAHE3_A/H meet automotive qualification standards?
Yes, SMB8J9.0CAHE3_A/H is AEC-Q101 qualified, verified per the full stress test schedule including HTGB, HTRB, temperature cycling, and ESD testing. The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification, and the device is rated for operation from –55 °C to +150 °C junction temperature - satisfying under-hood and chassis-mounted automotive requirements. This qualification is documented in Vishay's official specification document 88422, revision 09-Jan-2024.
What is the maximum reverse leakage current of SMB8J9.0CAHE3_A/H at its stand-off voltage?
The SMB8J9.0CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 9.0 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage preserves signal fidelity and minimizes power loss in high-impedance or battery-operated circuits. Leakage remains below 5 µA across the full –55 °C to +125 °C ambient range, ensuring stable performance in extended temperature applications without compromising system efficiency or noise floor.
How does the SMB8J9.0CAHE3_A/H package compare to SMA or SMC in terms of power handling?
The SMB8J9.0CAHE3_A/H uses the SMB (DO-214AA) package, which delivers 800 W peak pulse power - higher than SMA (DO-214AC, typically 400–600 W) but lower than SMC (DO-214AB, typically 1500 W). Its 72 °C/W junction-to-ambient thermal resistance requires minimum 5.0 mm × 5.0 mm copper pads per terminal for full-rated operation. Unlike SMC, SMB offers lower profile and better automated placement yield, making SMB8J9.0CAHE3_A/H optimal for space-constrained automotive ECUs where 800 W protection suffices.
SMB8J9.0CAHE3_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):
- 51.9A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J9.0CAHE3_A/H FAQ
1.How can I place an order for SMB8J9.0CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/H reliable?
The price and inventory of SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J9.0CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J9.0CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J9.0CAHE3_A/H?
SMB8J9.0CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/H?
For technical support, including SMB8J9.0CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J9.0CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J9.0CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J9.0CAHE3_A/H?
All SMB8J9.0CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J9.0CAHE3_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 SMB8J9.0CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMB8J9.0CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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