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Vishay General Semiconductor - Diodes Division SMBJ11CAHE3/52
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- Part No.:
- SMBJ11CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11CAHE3/52.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,014
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Product details
Overview
SMBJ11CAHE3/52 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 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤18.2 V at 33 A peak surge current - used for protecting MOSFETs, sensor interfaces, and industrial I/O lines against ESD and inductive switching spikes.
For engineers reviewing the SMBJ11CAHE3/52 datasheet, SMBJ11CAHE3/52 pinout, SMBJ11CAHE3/52 application, or SMBJ11CAHE3/52 equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and real-world protection use cases without generic marketing language.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche breakdown in both directions, enabling robust transient suppression on AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<5 µA at VWM) and fast response time (<1 ns), while the SMB package supports automated placement and meets MSL Level 1 reflow requirements (260 °C peak).
Designed for repetitive surge events at 0.01% duty cycle, SMBJ11CAHE3/52 sustains 600 W peak pulse power under standardized 10/1000 µs waveform conditions when mounted on 5.0 mm × 5.0 mm copper pads. Its junction temperature range spans −55 °C to +150 °C, and it exhibits a VBR temperature coefficient of +0.080 %/°C - critical for stability across automotive and industrial ambient extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected line |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - guaranteed avalanche initiation window; ensures predictable turn-on across production lot |
| VC @ IPPM | ≤18.2 V at 33 A - clamped voltage during 600 W transient; determines maximum stress on downstream ICs |
| PPPM | 600 W (10/1000 µs) - peak surge handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity |
| ID @ VWM | ≤5 µA - low leakage preserves signal integrity and battery life in always-on sensor nodes |
| RθJA | 100 °C/W - thermal resistance from junction to ambient; informs derating needed above 25 °C ambient |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive or high-power industrial enclosures |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | One terminal of symmetrical PN junction; accepts surge current regardless of polarity |
| Cathode | Transient current exit (either direction) | Second terminal of symmetrical PN junction; completes low-impedance clamp path to ground or rail |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection on AC lines, differential buses (e.g., RS-485), or ungrounded sensors without polarity concerns |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics where reliability under thermal cycling is mandatory |
| 600 W peak pulse power | Meets IEC 61000-4-5 surge test requirements up to 4 kV open-circuit (1.2/50 µs) with appropriate impedance matching |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with high-volume automated assembly lines |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to relay coil flyback in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp ±1 kV EFT bursts. Use Value: Limits induced voltage to ≤18.2 V, preventing ADC saturation and preserving measurement accuracy during transient events. |
Use Scenario: Safeguarding LIN bus transceiver pins against load dump and jump-start surges in door module ECUs. IC Role / Device Role / Timing Role: Clamping device connected between LIN data line and chassis ground to suppress >100 V transients within nanoseconds. Use Value: Maintains signal integrity below transceiver's absolute maximum rating (typically 27 V), avoiding communication failure. |
| RS-485 Communication Port | Power Supply Input Stage |
Use Scenario: Shielding half-duplex RS-485 transceivers (e.g., MAX1487) from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional TVS installed across A/B differential pair to absorb common-mode transients before they reach the IC. Use Value: Clamps differential surge energy without distorting DC bias, ensuring reliable fail-safe termination during EMC testing. |
Use Scenario: Secondary overvoltage protection on 12 V DC input rails feeding industrial PLC power supplies after primary MOV stage. IC Role / Device Role / Timing Role: Fast-response TVS placed downstream of bulk filter to catch residual spikes missed by slower MOVs. Use Value: Provides <1 ns response to fast-rising transients, limiting peak voltage to 18.2 V and preventing regulator latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA-E3/52 | Commercial-grade version; same VWM, VBR, and PPPM, but not AEC-Q101 qualified | Lacks automotive qualification; suitable for consumer or industrial non-automotive designs | Select SMBJ11CAHE3/52 when AEC-Q101 compliance is required; choose SMBJ11CA-E3/52 for cost-sensitive commercial applications. |
| SMAJ11CAHE3/A | Same AEC-Q101 qualification, but SMA (DO-214AC) package - smaller footprint (2.5 mm × 4.5 mm vs. 3.9 mm × 5.6 mm) and lower PPPM (400 W) | Lower surge rating limits use to lighter-duty transients; smaller size eases layout in space-constrained modules | Choose SMBJ11CAHE3/52 for higher surge robustness; select SMAJ11CAHE3/A only if board space is critical and 400 W suffices. |
Compared with SMBJ11CA-E3/52, the HE3 suffix adds AEC-Q101 qualification and tighter process controls; versus SMAJ11CAHE3/A, SMBJ11CAHE3/52 delivers 50% higher surge power in a slightly larger but thermally superior SMB package - making it optimal for demanding automotive and industrial environments.
Availability
SMBJ11CAHE3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, RS-485 communication ports, and DC power supply input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ11CAHE3/52 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, precision, and application-specific validation.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ11CAHE3/52?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ11CAHE3/52 provides symmetrical clamping in both polarities, unlike unidirectional "A" variants. This allows use on AC-coupled lines, differential buses, or any circuit where voltage transients may swing positive or negative relative to ground, without requiring polarity-aware placement.
Is SMBJ11CAHE3/52 suitable for IEC 61000-4-5 surge testing?
Yes, SMBJ11CAHE3/52 is rated for 600 W peak pulse power with a 10/1000 µs waveform - sufficient to meet IEC 61000-4-5 Level 3 (2 kV line-to-line, 4 kV line-to-ground) and Level 4 (4 kV line-to-line, 6 kV line-to-ground) when properly implemented with PCB layout best practices (e.g., short traces, adequate ground plane, proper decoupling). Its 18.2 V clamping voltage ensures downstream ICs remain within safe operating limits.
How does the HE3 suffix differ from E3 in SMBJ11CAHE3/52?
The "HE3" suffix indicates RoHS-compliant construction plus AEC-Q101 qualification - validated for automotive applications including thermal cycling, humidity resistance, and mechanical shock. In contrast, "E3" denotes RoHS-compliant commercial grade only. SMBJ11CAHE3/52 therefore supports under-hood and body-control module deployments where reliability certification is mandatory, while retaining identical electrical specs.
What is the maximum operating temperature for SMBJ11CAHE3/52?
SMBJ11CAHE3/52 has a specified junction temperature range of −55 °C to +150 °C. At ambient temperatures above 25 °C, power derating applies per Figure 2 in the datasheet - for example, at 85 °C ambient, its usable peak pulse power drops to approximately 420 W. The 150 °C TJ max enables deployment in engine compartments, motor drives, and other high-heat industrial zones.
Can SMBJ11CAHE3/52 replace SMBJ11AHE3/52 in a design?
No - SMBJ11CAHE3/52 is bidirectional, while SMBJ11AHE3/52 is unidirectional (cathode-marked, anode-to-ground configuration). Substituting them requires verifying circuit topology: bidirectional use demands symmetric placement with no reference to ground polarity, whereas unidirectional types require correct cathode orientation. Clamping behavior, leakage, and VBR tolerance also differ slightly; direct replacement is not recommended without schematic and layout review.
SMBJ11CAHE3/52 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 33A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ11CAHE3/52 FAQ
1.How can I place an order for SMBJ11CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11CAHE3/52 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 SMBJ11CAHE3/52 reliable?
The price and inventory of SMBJ11CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ11CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11CAHE3/52?
SMBJ11CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11CAHE3/52 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 SMBJ11CAHE3/52?
For technical support, including SMBJ11CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ11CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ11CAHE3/52 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 SMBJ11CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ11CAHE3/52?
All SMBJ11CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11CAHE3/52, 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 SMBJ11CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ11CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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