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Vishay General Semiconductor - Diodes Division SMBJ9.0CA-E3/5B
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- Part No.:
- SMBJ9.0CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0CA-E3/5B.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,389
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Product details
Overview
SMBJ9.0CA-E3/5B 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 (PPPM) with 10/1000 µs waveform - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ9.0CA-E3/5B datasheet, SMBJ9.0CA-E3/5B pinout, SMBJ9.0CA-E3/5B application, or SMBJ9.0CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.71), MSL Level 1 moisture sensitivity, and compatibility with automated SMT assembly on standard PCB pads.
Technical Context
This device operates as a voltage-clamped surge protector: under transient overvoltage, it avalanches symmetrically in both directions to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while the bidirectional structure eliminates polarity concerns in AC-coupled or differential signal paths.
Thermal performance is defined by RθJA = 100 °C/W and RθJL = 20 °C/W, with derating applied above TA = 25 °C per Fig. 2. The 150 °C max junction temperature and -55 °C to +150 °C operating range support use in automotive-grade and industrial environments when mounted per recommended 0.2" × 0.2" copper pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min / max | 10.0 V / 11.1 V at IT = 1 mA - verified breakdown threshold range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 15.4 V at 39.0 A - clamping voltage during 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; supports repetitive surges at 0.01 % duty cycle. |
| ID @ VWM | 10 µA - maximum reverse leakage at 9.0 V; negligible power loss and minimal impact on high-impedance circuits. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm length, 4.06 mm width, and 2.20 mm height for reliable reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function identically as anode and cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal conducts during positive or negative transients; no fixed polarity - simplifies PCB layout and eliminates orientation errors. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line pair (e.g., RS-485 A/B, USB D+/D−). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or ungrounded lines without polarity constraints. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) when properly laid out - reduces need for cascaded protection stages. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage exposure to downstream ICs compared to higher-ratio TVS devices, improving system robustness. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profiles up to 260 °C peak - compatible with high-volume automated assembly. |
| Glass-passivated junction | Ensures stable VBR over time and temperature, low leakage, and resistance to humidity-induced parameter drift. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting analog output (4–20 mA) or digital I/O (RS-485) lines in factory automation sensors exposed to relay switching noise and ESD. IC Role / Device Role: Bidirectional voltage clamp placed across signal pair to shunt transients before reaching isolator or transceiver IC. Use Value: Limits induced surges to ≤15.4 V, preventing latch-up or damage to MAX1487 or ADuM1201-level components. |
Use Scenario: Shielding Ethernet PHY or xDSL line drivers from lightning-induced surges and induced AC mains coupling. IC Role / Device Role: Primary surge suppression element on twisted-pair line inputs, upstream of common-mode chokes and data transformers. Use Value: Clamps common-mode transients to <16 V while maintaining signal integrity up to 100 MHz due to low junction capacitance (~200 pF). |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Safeguarding LIN bus or CAN FD stub lines in door modules or lighting controllers against load dump and ISO 7637-2 pulses. IC Role / Device Role: Secondary protection device after primary TVS or varistor, placed directly at connector entry point. Use Value: Withstands repetitive 100 V/50 ms pulses per ISO 7637-2 Pulse 1/2a with <15.4 V clamping - preserves MCU GPIO integrity. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers connected to microcontroller I/O. IC Role / Device Role: Low-leakage (10 µA) bidirectional clamp across motor terminals or H-bridge sense lines. Use Value: Prevents false triggering of overvoltage detection in STM32G0-based motor control firmware during brush arcing events. |
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-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No difference in circuit function or layout; selected only where halogen-free compliance is mandated. | Choose SMBJ9.0CA-M3/5B when environmental compliance requires halogen-free materials per IEC 61249-2-21. |
| SMCJ9.0CA-E3/2A | Same VWM (9.0 V) and VC (15.4 V), but in larger SMC (DO-214AB) package with 1500 W PPPM rating. | Higher surge capacity suits front-end AC input or PoE port protection; requires larger PCB area and different pad layout. | Choose SMCJ9.0CA-E3/2A when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits SMC footprint. |
Compared with SMBJ9.0CA-E3/5B, the M3 variant offers identical protection performance with halogen-free construction, while the SMCJ9.0CA-E3/2A delivers 2.5× higher surge energy handling at the cost of increased size and thermal mass - enabling tiered protection architecture where SMBJ9.0CA-E3/5B serves as secondary clamping near ICs.
Availability
SMBJ9.0CA-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply and full traceability.
Supply support for SMBJ9.0CA-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and infrastructure equipment where surge immunity and long-term parametric stability are critical.
FAQ
What is the clamping voltage of SMBJ9.0CA-E3/5B at its rated peak pulse current?
The SMBJ9.0CA-E3/5B has a maximum clamping voltage (VC) of 15.4 V at 39.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and ensures predictable overvoltage limiting during surge events. The SMBJ9.0CA-E3/5B maintains this clamping performance across its specified operating temperature range and is validated in Vishay's 88392 datasheet revision 09-Jan-2024.
Is SMBJ9.0CA-E3/5B suitable for bidirectional signal lines like RS-485 or USB?
Yes, SMBJ9.0CA-E3/5B is explicitly designed for bidirectional applications: its symmetrical breakdown characteristics allow clamping of both positive and negative transients without polarity marking. It is commonly used across RS-485 A/B pairs and USB D+/D− lines where ground-referenced unidirectional TVS diodes would require dual placement. The SMBJ9.0CA-E3/5B datasheet confirms bidirectional operation under "DEVICES FOR BIDIRECTION APPLICATIONS".
Does SMBJ9.0CA-E3/5B meet automotive qualification standards?
The base SMBJ9.0CA-E3/5B is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the automotive variant SMBJ9.0CAHE3_B/I with identical electrical specs and AEC-Q101 qualification. The SMBJ9.0CA-E3/5B itself meets MSL Level 1 and operates from -55 °C to +150 °C, but formal automotive qualification applies only to HE3/HM3 suffix versions - confirmed in the "MECHANICAL DATA" section of document 88392.
What is the maximum reverse leakage current for SMBJ9.0CA-E3/5B at its stand-off voltage?
The SMBJ9.0CA-E3/5B exhibits a maximum reverse leakage current (ID) of 10 µA at its 9.0 V stand-off voltage (VWM), measured at TA = 25 °C. This low leakage ensures minimal power drain and avoids interference with high-impedance sensing circuits. The value is specified in the "ELECTRICAL CHARACTERISTICS" table of Vishay's SMBJ5.0A–SMBJ188A datasheet (document 88392), row for SMBJ9.0CA.
Can SMBJ9.0CA-E3/5B be used in place of a unidirectional SMBJ9.0A?
No - SMBJ9.0CA-E3/5B is bidirectional and lacks polarity marking, whereas SMBJ9.0A is unidirectional with a cathode band. Substituting them requires circuit review: SMBJ9.0CA-E3/5B may be used in AC-coupled or differential paths, but will not provide correct forward conduction in DC-biased unidirectional configurations. The SMBJ9.0CA-E3/5B datasheet explicitly states "Electrical characteristics apply in both directions", confirming functional distinction from unidirectional variants.
SMBJ9.0CA-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):
- 39A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ9.0CA-E3/5B FAQ
1.How can I place an order for SMBJ9.0CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0CA-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 SMBJ9.0CA-E3/5B reliable?
The price and inventory of SMBJ9.0CA-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 SMBJ9.0CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ9.0CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0CA-E3/5B?
SMBJ9.0CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0CA-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 SMBJ9.0CA-E3/5B?
For technical support, including SMBJ9.0CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ9.0CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0CA-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 SMBJ9.0CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ9.0CA-E3/5B?
All SMBJ9.0CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0CA-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 SMBJ9.0CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ9.0CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0CA-E3/5B Tags
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Diodes Incorporated
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Diodes Incorporated
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