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Vishay General Semiconductor - Diodes Division SMBJ8.0CA-E3/5B
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- Part No.:
- SMBJ8.0CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CA-E3/5B.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,328
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Product details
Overview
SMBJ8.0CA-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 8.0 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 μs), and clamps to ≤13.6 V at 44.1 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ8.0CA-E3/5B datasheet, SMBJ8.0CA-E3/5B pinout, SMBJ8.0CA-E3/5B application, or SMBJ8.0CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping voltage under 10/1000 μs surge, RoHS-compliant commercial-grade packaging, and compatibility with automated SMT assembly on PCBs requiring IEC 61000-4-2/4-4 level protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 8.89–9.83 V (min/max) at 1 mA test current. Its low clamping ratio (VC/VWM ≈ 1.7) ensures effective overvoltage suppression without excessive voltage overshoot during transient events.
Thermal performance is defined by RθJA = 100 °C/W and maximum junction temperature of +150 °C. The device meets MSL Level 1 per J-STD-020, supports lead-free reflow up to 260 °C peak, and exhibits <1.0 μA reverse leakage at VWM - critical for low-power sensor and interface circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 8.89 V / 9.83 V at 1 mA - guaranteed breakdown threshold range for reliable turn-on |
| VC @ IPPM | 13.6 V at 44.1 A - clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 600 W - peak transient energy absorption capacity under standardized waveform |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMT outline, 5.21 mm × 4.06 mm footprint |
| TJ max. | +150 °C - enables operation in industrial and automotive-adjacent environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction when V > |VBR| |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 3 surges (1 kV open-circuit, 2 Ω source impedance) |
| Low clamping voltage (13.6 V @ 44.1 A) | Provides tighter voltage margin than unidirectional variants, reducing risk of IC latch-up |
| RoHS-compliant E3 suffix | Meets commercial-grade environmental compliance with matte tin-plated leads solderable per J-STD-002 |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile without dry-pack requirements |
Applications
| Industrial Sensor Interface Protection | Telecom Line Surge Suppression |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) in PLC modules from inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal and return paths to limit excursion beyond ±15 V. Use Value: Prevents damage to precision DACs and op-amps while maintaining sub-μA leakage for accurate current sourcing. |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary line-side TVS mounted differential across A/B bus lines before ESD protection diodes. Use Value: Clamps common-mode transients to <14 V, preserving transceiver common-mode range and avoiding false logic states. |
| Automotive Body Control Module Inputs | Consumer Appliance Motor Driver Feedback Lines |
|
Use Scenario: Safeguarding microcontroller GPIOs connected to door lock actuators subject to relay coil flyback. IC Role / Device Role / Timing Role: Localized TVS at connector entry point, shunting transients before signal conditioning circuitry. Use Value: Eliminates need for external series resistance or RC filtering, reducing BOM count and board space. |
Use Scenario: Protecting hall-effect sensor outputs feeding motor commutation logic in smart washing machine drives. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bidirectional clamp on low-voltage analog feedback traces. Use Value: Maintains signal fidelity up to 100 kHz while suppressing 600 W surges induced by brush arcing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No difference in protection performance; selected where halogen-free material compliance is mandated | Choose SMBJ8.0CA-M3/5B for green manufacturing programs requiring halogen-free bill-of-materials |
| SMAJ8.0CA-E3/5B | Lower 400 W peak pulse power, same VWM and VC, SMA (DO-214AC) package - 20% smaller footprint | Reduced surge handling margin; suitable only for lower-energy threat environments (e.g., IEC 61000-4-2 Level 2) | Select SMAJ8.0CA-E3/5B when board space is constrained and transient severity is verified below 400 W |
Compared with SMBJ8.0CA-E3/5B, the M3 variant offers identical protection with halogen-free construction, while the SMAJ8.0CA-E3/5B trades 33% peak power capacity for 20% smaller PCB area - requiring explicit threat-level validation before substitution.
Availability
SMBJ8.0CA-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control inputs, and consumer appliance motor feedback circuits requiring stable component supply and long-term obsolescence management.
Supply support for SMBJ8.0CA-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 targets robust, high-energy transient suppression in space-constrained SMT designs - engineered for industrial, telecom, and automotive-qualified systems where consistent clamping and thermal stability are critical.
FAQ
What does the "CA" suffix indicate in SMBJ8.0CA-E3/5B?
The "CA" suffix denotes a bidirectional configuration: SMBJ8.0CA-E3/5B provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional "A" variants, it has no cathode band marking and functions identically across either terminal polarity - essential for AC signal lines or floating interfaces where polarity reversal may occur.
Is SMBJ8.0CA-E3/5B suitable for IEC 61000-4-5 surge testing?
Yes, SMBJ8.0CA-E3/5B is rated for 600 W peak pulse power with a 10/1000 μs waveform, meeting IEC 61000-4-5 Level 3 (1 kV open-circuit, 2 Ω source impedance) when properly mounted on 5.0 mm × 5.0 mm copper pads. Its 13.6 V clamping voltage at 44.1 A ensures protected circuits remain within safe operating limits during standardized surge events.
How does the E3 suffix affect SMBJ8.0CA-E3/5B's compliance and assembly?
The E3 suffix indicates RoHS-compliant, commercial-grade construction with matte tin-plated leads that meet J-STD-002 solderability requirements and JESD 22-B102 whisker resistance (Class 2). SMBJ8.0CA-E3/5B supports standard lead-free reflow profiles up to 260 °C peak and carries MSL Level 1 rating - enabling direct placement without baking or special handling.
What is the thermal resistance of SMBJ8.0CA-E3/5B, and how does it impact layout?
SMBJ8.0CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended pad layout. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, PCB layout must use ≥5.0 mm × 5.0 mm copper pads per terminal - undersized pads will cause premature thermal derating and reduced surge endurance.
Can SMBJ8.0CA-E3/5B replace unidirectional SMBJ8.0A-E3/5B in existing designs?
No - SMBJ8.0CA-E3/5B is bidirectional and lacks polarity marking, whereas SMBJ8.0A-E3/5B is unidirectional with a cathode band. Substituting SMBJ8.0CA-E3/5B in a unidirectional circuit may allow unintended forward conduction during normal operation. Reverse leakage remains ≤1.0 μA in both, but functional behavior differs fundamentally; redesign verification is required.
SMBJ8.0CA-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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 44.1A
- 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)
SMBJ8.0CA-E3/5B FAQ
1.How can I place an order for SMBJ8.0CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CA-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 SMBJ8.0CA-E3/5B reliable?
The price and inventory of SMBJ8.0CA-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 SMBJ8.0CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CA-E3/5B?
SMBJ8.0CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CA-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 SMBJ8.0CA-E3/5B?
For technical support, including SMBJ8.0CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ8.0CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CA-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 SMBJ8.0CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CA-E3/5B?
All SMBJ8.0CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CA-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 SMBJ8.0CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ8.0CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0CA-E3/5B Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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