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Vishay General Semiconductor - Diodes Division SMB8J9.0CAHE3/5B
- Part No.:
- SMB8J9.0CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J9.0CAHE3/5B.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,020
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Product details
Overview
SMB8J9.0CAHE3/5B 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 clamping voltage (VC) at 20 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - optimized for automotive-grade ESD and load-dump protection in sensor interfaces and power rails.
For engineers reviewing the SMB8J9.0CAHE3/5B datasheet, SMB8J9.0CAHE3/5B pinout, SMB8J9.0CAHE3/5B application, or SMB8J9.0CAHE3/5B equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping symmetry, low leakage (<1.0 μA at VWM), thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients exceeding its breakdown threshold (VBR min = 10.0 V, max = 11.1 V at 1.0 mA). Its glass-passivated junction ensures stable avalanche behavior under repetitive surges, while the bidirectional configuration enables symmetric suppression of both positive and negative polarity transients without polarity sensitivity.
Designed per ANSI/IEEE C62.35 standards, SMB8J9.0CAHE3/5B delivers consistent clamping performance up to TJ = 150 °C, with derating applied above TA = 25 °C per Fig. 2. Its MSL Level 1 rating (JEDEC J-STD-020) and matte tin-plated leads support lead-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 10.0 / 11.1 V at 1.0 mA - defines reliable breakdown onset window for design margining |
| VC @ IPPM | 15.4 V at 20 A - peak clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 800 W - maximum single-pulse transient energy absorption capability |
| ID @ VWM | <1.0 μA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max. | +150 °C - enables operation in under-hood automotive environments |
| RθJL | 20 °C/W - low junction-to-lead thermal resistance supports sustained surge duty cycles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals for AC-coupled or dual-rail protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping requires no orientation during placement |
| Case (body) | Thermal and mechanical interface | Exposed metal slug provides primary heat path to PCB copper; requires minimum 5.0 mm × 5.0 mm pad per terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Glass-passivated junction | Ensures long-term stability and repeatable clamping performance across temperature and lifetime |
| MSL Level 1 | Enables standard SMT reflow without moisture sensitivity concerns or baking requirements |
| Low RθJL (20 °C/W) | Supports higher surge repetition rates by efficiently transferring heat to PCB copper |
| RoHS-compliant & halogen-free option | HE3 suffix indicates RoHS compliance; HM3 variant adds halogen-free molding compound |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs against ISO 7637-2 pulse 1, 2a, and 5a transients in vehicle body control modules. IC Role / Device Role / Timing Role: Shunt clamping device placed directly at connector entry point to limit voltage seen by transceiver ESD structures. Use Value: Clamps 800 W surges to ≤15.4 V, preventing latch-up or gate oxide damage in 5 V CAN PHY ICs while maintaining <1.0 μA leakage at 9 V bus. | Use Scenario: Safeguarding RS-485/RS-422 differential data lines in factory automation PLC I/O modules exposed to motor switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS pair (one per line) suppressing common-mode and differential surges on twisted-pair cables. Use Value: Symmetric 10–11.1 V breakdown enables equal clamping on both polarities, preserving signal integrity during ±1 kV EFT bursts without polarity biasing. |
| Consumer Power Adapter Input | Medical Diagnostic Equipment Power Rail |
Use Scenario: Input-stage surge protection for 12 V wall adapters subjected to lightning-induced surges per IEC 61000-4-5 (1.2/50 μs + 8/20 μs combo wave). IC Role / Device Role / Timing Role: Primary shunt limiter upstream of DC-DC converter input capacitor, absorbing bulk surge energy before regulation stage. Use Value: 800 W PPPM rating handles 1.2/50 μs surges up to 1.5 kV open-circuit, with 15.4 V clamping protecting 16 V-rated input capacitors and MOSFETs. | Use Scenario: Secondary-side 5 V rail protection in portable ultrasound units where EMI immunity must meet IEC 60601-1-2 4th edition. IC Role / Device Role / Timing Role: Low-leakage TVS on regulated 5 V supply feeding analog front-end ADCs and precision op-amps. Use Value: <1.0 μA reverse leakage at 9 V VWM avoids loading sensitive reference voltages, while 15.4 V VC prevents overvoltage on 5.5 V absolute-maximum-rated components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CAHE3/5B | Unidirectional variant (SMBJ series) offers 1000 W PPPM but only unidirectional clamping; lacks AEC-Q101 qualification in base HE3 version | Suitable for DC-biased rails where polarity is fixed; not recommended for AC-coupled or floating signal lines | Select SMB8J9.0CAHE3/5B when bidirectional symmetry and automotive qualification are mandatory |
| SMCJ9.0CAHE3/5B | Same VWM/VC specs but in larger SMC (DO-214AB) package; higher PPPM (1500 W), lower RθJA (40 °C/W vs. 72 °C/W) | Better suited for high-repetition surge environments; requires larger PCB footprint and different pad layout | Choose SMCJ9.0CAHE3/5B only if 1500 W rating is required and board space permits SMC footprint |
Compared with SMBJ9.0CAHE3/5B and SMCJ9.0CAHE3/5B, SMB8J9.0CAHE3/5B uniquely balances AEC-Q101 compliance, bidirectional clamping, and SMB footprint - making it optimal for space-constrained automotive sensor nodes where polarity-agnostic protection is essential and 800 W surge capacity suffices.
Availability
SMB8J9.0CAHE3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial communication interfaces, and medical power supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J9.0CAHE3/5B 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, automotive qualification, and high-power density packaging.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments where bidirectional clamping and compact SMB footprint are critical.
FAQ
What is the clamping voltage of SMB8J9.0CAHE3/5B at its rated peak pulse current?
The SMB8J9.0CAHE3/5B has a maximum clamping voltage (VC) of 15.4 V when subjected to its specified peak pulse current (IPPM) of 20 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry sees no more than 15.4 V during surge events - critical for protecting 5 V or 12 V logic and analog components. The SMB8J9.0CAHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J9.0CAHE3/5B suitable for automotive applications?
Yes, SMB8J9.0CAHE3/5B is AEC-Q101 qualified and explicitly designated for automotive use, as indicated by the "HE3" suffix in its part number. It meets stringent requirements for temperature cycling, humidity resistance, and surge robustness required in engine control units, ADAS camera modules, and body electronics. Its bidirectional architecture and 150 °C maximum junction temperature make SMB8J9.0CAHE3/5B appropriate for under-hood and cabin-mounted systems.
What does the "5B" in SMB8J9.0CAHE3/5B indicate?
The "5B" suffix denotes the preferred package code specifying 13-inch diameter plastic tape and reel packaging with a base quantity of 3200 units per reel. This format supports high-volume automated SMT assembly and is compatible with standard pick-and-place equipment. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "5B" ensures consistent logistics and handling - all verified in Vishay's official ordering information table for SMB8J9.0CAHE3/5B.
How does SMB8J9.0CAHE3/5B differ from unidirectional TVS diodes like SMBJ9.0AHE3/5B?
SMB8J9.0CAHE3/5B is bidirectional with symmetrical clamping for both polarities, whereas SMBJ9.0AHE3/5B is unidirectional and only clamps positive transients relative to cathode. SMB8J9.0CAHE3/5B has lower peak pulse power (800 W vs. 1000 W) and reduced IPPM (20 A vs. 64.9 A), reflecting its bidirectional design trade-off. For AC-coupled lines or floating references, SMB8J9.0CAHE3/5B is mandatory; SMBJ9.0AHE3/5B suits DC-biased rails where polarity is fixed and higher surge capacity is needed.
What is the thermal resistance from junction to lead (RθJL) for SMB8J9.0CAHE3/5B?
The SMB8J9.0CAHE3/5B has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, as specified in Vishay's Thermal Characteristics table. This low value enables efficient heat transfer from the silicon die to the PCB copper via the device's soldered terminals - especially important during repetitive surge events. When mounted on the recommended 5.0 mm × 5.0 mm copper pads per terminal, SMB8J9.0CAHE3/5B sustains higher duty-cycle operation without exceeding its 150 °C maximum junction temperature.
SMB8J9.0CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMB8J9.0CAHE3/5B FAQ
1.How can I place an order for SMB8J9.0CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J9.0CAHE3/5B 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 SMB8J9.0CAHE3/5B reliable?
The price and inventory of SMB8J9.0CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J9.0CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J9.0CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J9.0CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J9.0CAHE3/5B?
SMB8J9.0CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J9.0CAHE3/5B 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 SMB8J9.0CAHE3/5B?
For technical support, including SMB8J9.0CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J9.0CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J9.0CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J9.0CAHE3/5B 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 SMB8J9.0CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J9.0CAHE3/5B?
All SMB8J9.0CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J9.0CAHE3/5B, 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 SMB8J9.0CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J9.0CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J9.0CAHE3/5B Tags
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