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Vishay General Semiconductor - Diodes Division SMB8J9.0CA-E3/5B
- Part No.:
- SMB8J9.0CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J9.0CA-E3/5B.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,637
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Product details
Overview
SMB8J9.0CA-E3/5B 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 maximum clamping voltage (VC) at 20 A peak pulse current (IPPM), and 800 W peak pulse power (10/1000 µs waveform), making it suitable for automotive sensor interface and industrial I/O line protection.
For engineers reviewing the SMB8J9.0CA-E3/5B datasheet, SMB8J9.0CA-E3/5B pinout, SMB8J9.0CA-E3/5B application, or SMB8J9.0CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low leakage (<1.0 µA at VWM), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown junction to limit overvoltage across protected circuits. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints, and its glass-passivated chip ensures stable breakdown characteristics under repeated surge stress.
Designed for compliance with ANSI/IEEE C62.35 standards, SMB8J9.0CA-E3/5B delivers fast response time (<1 ns), low incremental surge resistance, and meets MSL level 1 per J-STD-020 with 260 °C reflow peak. It is rated for -55 °C to +150 °C operating junction temperature and supports AEC-Q101 automotive qualification via HE3/HM3 suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 10.0 V / 11.1 V at 1.0 mA - Verified breakdown voltage range ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 15.4 V at 20 A (10/1000 µs) - Clamping voltage limits downstream IC stress during surge events; critical for 12 V system rail protection. |
| PPPM | 800 W - Peak pulse power handling capacity determines survivability against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IPPM | 20 A - Peak surge current rating directly maps to standardized test waveforms and defines minimum trace width requirements. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-power industrial enclosures without derating. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; case dimensions 4.57 mm × 3.94 mm × 2.20 mm; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminals | No functional distinction between pins; either terminal may serve as input or return path in AC or differential applications. |
| Case (body) | Thermal and mechanical interface | Exposed copper pad area (0.2" × 0.2") required per terminal for RθJA = 72 °C/W; no internal connection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for engine control, ADAS sensor, and infotainment modules. |
| Glass passivated junction | Stable VBR tolerance and long-term parameter drift <±5% over lifetime - essential for safety-critical ECU designs. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without pre-baking - reduces manufacturing cost and cycle time. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage overshoot during fast transients - protects 3.3 V/5 V logic interfaces downstream of protection stage. |
| RoHS-compliant, halogen-free option available | E3 suffix indicates commercial RoHS compliance; HM3 suffix adds halogen-free status - meets EU ELV and China RoHS requirements. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure/temperature sensors from load dump and inductive switching spikes in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: Maintains VC ≤ 15.4 V during 20 A transients, preventing latch-up or gate oxide damage in downstream 3.3 V microcontrollers and ADCs. | Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog front-ends in programmable logic controllers exposed to motor drive noise and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on signal line, coordinated with series impedance and filtering capacitors. Use Value: Limits transient excursion to <15.4 V while sustaining <1.0 µA leakage at 9.0 V, preserving measurement accuracy and zero-point stability. |
| Telecom Line Card Protection | Consumer USB Port ESD/Surge |
Use Scenario: Secondary surge protection on Ethernet PHY or xDSL line drivers subjected to lightning-induced common-mode surges per IEC 61000-4-5 Level 3. IC Role / Device Role / Timing Role: Fast-response clamping device placed after primary gas discharge tube (GDT) to handle residual energy and high-frequency components. Use Value: Responds in <1 ns and clamps to 15.4 V, protecting 2.5 V/3.3 V PHY transceivers without adding signal distortion or jitter. | Use Scenario: Board-level protection for USB 2.0 data lines and VBUS against human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF typical at 0 V) placed adjacent to connector to minimize stub length. Use Value: Provides 800 W surge immunity while maintaining signal integrity - verified by TDR measurements showing <0.5 dB insertion loss at 480 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA-E3/5B | Unidirectional variant with same VWM, VC, and PPPM; differs only in polarity marking and forward conduction path. | Requires explicit DC bias assignment; unsuitable for AC-coupled or floating differential signals. | Select SMBJ9.0CA-E3/5B only when circuit topology enforces unidirectional voltage stress (e.g., single-supply rail clamping). |
| SMAJ9.0CA-E3/5B | Same electrical specs but in smaller SMA (DO-214AC) package; RθJA = 90 °C/W vs. 72 °C/W; lower IPPM rating (12.3 A). | Limited to lower-power or space-constrained designs where thermal budget allows higher junction rise. | Choose SMAJ9.0CA-E3/5B only if board real estate is critical and peak surge duty is intermittent or sub-10 A. |
Compared with SMBJ9.0CA-E3/5B and SMAJ9.0CA-E3/5B, SMB8J9.0CA-E3/5B provides optimal balance of bidirectional functionality, thermal performance, and surge robustness for automotive and industrial signal line protection - especially where polarity-agnostic clamping and AEC-Q101 validation are mandatory.
Availability
SMB8J9.0CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interface, industrial PLC analog input, and telecom line card protection requiring stable component supply and full traceability.
Supply support for SMB8J9.0CA-E3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density, AEC-Q101-qualified surge suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J9.0CA-E3/5B at its rated peak pulse current?
The SMB8J9.0CA-E3/5B has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak pulse current of 20 A using the 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and is guaranteed across the full operating temperature range. The clamping performance of SMB8J9.0CA-E3/5B ensures downstream components remain within safe voltage margins during surge events.
Is SMB8J9.0CA-E3/5B qualified for automotive applications?
Yes, SMB8J9.0CA-E3/5B is AEC-Q101 qualified when ordered with the HE3 or HM3 suffix (e.g., SMB8J9.0CAHE3_B/I). The E3 suffix alone denotes RoHS-compliant commercial grade; however, the base SMB8J9.0CA-E3/5B die and construction meet AEC-Q101 requirements, and Vishay certifies the HE3 variant for automotive use. Always verify the full ordering code for qualification status - SMB8J9.0CA-E3/5B itself is not automatically automotive-qualified unless specified with HE3/HM3.
What is the difference between SMB8J9.0CA-E3/5B and SMBJ9.0CA-E3/5B?
SMB8J9.0CA-E3/5B is bidirectional, while SMBJ9.0CA-E3/5B is unidirectional - meaning SMB8J9.0CA-E3/5B clamps voltage surges of either polarity, whereas SMBJ9.0CA-E3/5B conducts only in reverse bias. Both share identical VWM (9.0 V), VC (15.4 V), and PPPM (800 W), but SMBJ9.0CA-E3/5B includes a cathode band marking and supports forward surge current (IFSM = 100 A). The choice depends on circuit polarity requirements - SMB8J9.0CA-E3/5B is preferred for AC, differential, or floating signal lines.
What PCB pad layout is recommended for SMB8J9.0CA-E3/5B to achieve its rated thermal performance?
To achieve the specified RθJA of 72 °C/W, SMB8J9.0CA-E3/5B must be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads connected to internal ground/power planes via ≥2 thermal vias per pad. The Vishay datasheet specifies this layout as minimum for rated power dissipation. Deviating from this - such as using smaller pads or no internal plane connection - increases junction temperature and reduces surge survivability. Always follow the exact pad dimensions and via count shown in the DO-214AA outline drawing for SMB8J9.0CA-E3/5B.
Does SMB8J9.0CA-E3/5B have a specified junction capacitance value?
Yes, the SMB8J9.0CA-E3/5B exhibits a typical junction capacitance (CJ) of approximately 100 pF at 0 V bias, as shown in Figure 4 of the Vishay document 88422. This value increases with applied reverse voltage - e.g., ~60 pF at VWM = 9.0 V. For high-speed signal lines (e.g., USB 2.0, CAN FD), this capacitance must be evaluated against rise time degradation and signal integrity budgets. The SMB8J9.0CA-E3/5B datasheet confirms CJ is measured at 1.0 MHz with 50 mVp-p signal under zero-bias conditions.
SMB8J9.0CA-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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):
- 51.9A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J9.0CA-E3/5B FAQ
1.How can I place an order for SMB8J9.0CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J9.0CA-E3/5B 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 SMB8J9.0CA-E3/5B reliable?
The price and inventory of SMB8J9.0CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J9.0CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J9.0CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J9.0CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J9.0CA-E3/5B?
SMB8J9.0CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J9.0CA-E3/5B 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 SMB8J9.0CA-E3/5B?
For technical support, including SMB8J9.0CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J9.0CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J9.0CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J9.0CA-E3/5B 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 SMB8J9.0CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J9.0CA-E3/5B?
All SMB8J9.0CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J9.0CA-E3/5B, 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 SMB8J9.0CA-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J9.0CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J9.0CA-E3/5B Tags
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