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Vishay General Semiconductor - Diodes Division SMAJ11CAHE3_A/H
- Part No.:
- SMAJ11CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11CAHE3_A/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ11CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 11 V standoff voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V maximum clamping voltage (VC) at 22 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ11CAHE3_A/H datasheet, SMAJ11CAHE3_A/H pinout, SMAJ11CAHE3_A/H application, or SMAJ11CAHE3_A/H equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast response time, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and surge protection design.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction enables stable clamping performance under repetitive transient stress, and its thermal resistance (RθJA = 120 °C/W) supports operation up to +150 °C junction temperature when mounted on standard 0.2" × 0.2" copper pads.
The device complies with ANSI/IEEE C62.35 for transient suppressor definitions and meets UL 497B recognition (QVGQ2, E136766). Its 1.0 μA maximum reverse leakage at VWM ensures minimal standby power impact on protected circuits, while its 0.080 %/°C VBR temperature coefficient maintains predictable clamping across operating temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 11 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 12.2–13.5 V at 1 mA - Voltage at which device enters avalanche conduction; ensures reliable turn-on during overvoltage events |
| VC (Clamping Voltage) | 18.2 V at 22 A (10/1000 μs) - Maximum voltage seen by protected circuit during rated surge; limits stress on downstream components |
| PPPM (Peak Pulse Power) | 400 W - Sustains 10/1000 μs transients without failure; derates to 300 W above 78 V per spec |
| IPPM (Peak Pulse Current) | 22 A - Peak surge current capability under standardized waveform; determines protection level against IEC 61000-4-5 surges |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with automated placement and reflow |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable. Device has two leads: anode and cathode are functionally identical in bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current into device during positive voltage excursions; clamps to VC to limit voltage rise |
| Cathode | Transient current entry (negative half-cycle) | Conducts surge current into device during negative voltage excursions; provides symmetrical clamping in both directions |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics - supports long-term reliability under thermal cycling and vibration |
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients common in 12 V automotive load-dump and inductive switching events without degradation |
| Low clamping ratio (VC/VWM ≈ 1.65) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V and 5 V logic interfaces and analog sensors |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-induced popcorn cracking or delamination |
| Glass passivated junction | Provides stable leakage and breakdown characteristics over lifetime - reduces parameter drift under humidity and temperature stress |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting LIN bus and switch input lines in BCM against load dump and battery reversal transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector interface to shunt surge energy before reaching microcontroller GPIOs. Use Value: Prevents latch-up and permanent damage to 5 V tolerant inputs under ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2b (inductive switching). |
Use Scenario: Shielding 24 V digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on each input channel, located before optocoupler or Schmitt trigger input stage. Use Value: Ensures immunity to IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) up to ±1 kV, maintaining signal integrity during factory floor operation. |
| Automotive Camera Module Power Line | Consumer IoT Sensor Signal Line |
Use Scenario: Safeguarding 12 V power rail of ADAS camera modules against ignition noise and alternator ripple spikes. IC Role / Device Role / Timing Role: Low-leakage bidirectional clamp on main supply line, placed upstream of DC-DC converter input filter. Use Value: Limits voltage excursions to ≤18.2 V during 100 ns–1 ms transients, preventing brownout resets and image sensor corruption. |
Use Scenario: Protecting I²C and analog output lines of environmental sensors (e.g., temperature/humidity) in smart home hubs. IC Role / Device Role / Timing Role: Secondary-level TVS on PCB traces between sensor IC and MCU, minimizing capacitance impact on signal bandwidth. Use Value: Adds <10 pF junction capacitance at VWM, preserving signal rise/fall times while suppressing ESD per IEC 61000-4-2 ±8 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11CA-E3/61 | Same electrical specs and SMA package; RoHS-compliant commercial grade (non-AEC-Q101) | Lacks automotive qualification; suitable for industrial/commercial designs without automotive certification requirements | Select when AEC-Q101 is not mandated and cost optimization is prioritized |
| SMBJ11CAHE3_A/H | Same VWM, VBR, VC; higher PPPM = 600 W; larger SMB (DO-214AA) package (5.3 mm × 4.6 mm) | Offers greater surge margin but requires larger PCB footprint; less suitable for space-constrained automotive modules | Choose when higher energy handling is needed and board area permits larger package |
Compared with SMAJ11CA-E3/61, SMAJ11CAHE3_A/H adds AEC-Q101 qualification and tighter process controls for automotive use; compared with SMBJ11CAHE3_A/H, it trades 200 W peak power for 25 % smaller footprint - enabling compact placement near connectors in tight automotive ECUs.
Availability
SMAJ11CAHE3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, ADAS camera power conditioning, and consumer IoT sensor interface applications requiring stable component supply and traceable sourcing.
Supply support for SMAJ11CAHE3_A/H 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, TVS devices, and power MOSFETs with emphasis on reliability and application-specific performance.
The SMAJ series was developed for robust, surface-mount transient suppression in automotive, industrial, and telecom systems - balancing high surge capability, low clamping voltage, and AEC-Q101 compliance in compact packages.
FAQ
What is the clamping voltage of SMAJ11CAHE3_A/H at its rated peak pulse current?
The SMAJ11CAHE3_A/H has a maximum clamping voltage (VC) of 18.2 V at 22 A peak pulse current with a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected circuit nodes will not exceed 18.2 V during a defined surge event - essential for safeguarding 5 V and 12 V system components. The SMAJ11CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMAJ11CAHE3_A/H suitable for automotive applications?
Yes, SMAJ11CAHE3_A/H is AEC-Q101 qualified and specifically designated for automotive use with the "HE3" suffix. It undergoes rigorous stress testing for temperature cycling, humidity, mechanical shock, and surge endurance - meeting requirements for engine control, body electronics, and ADAS subsystems. The SMAJ11CAHE3_A/H is listed in Vishay's automotive-grade product portfolio with full traceability and PPAP support.
How does the bidirectional configuration of SMAJ11CAHE3_A/H affect its circuit implementation?
The bidirectional configuration of SMAJ11CAHE3_A/H means it provides symmetrical clamping in both voltage polarities - no polarity marking is present, and either terminal can serve as anode or cathode. This simplifies layout on AC-coupled lines (e.g., CAN, LIN, or audio signals) and eliminates orientation errors during automated assembly. Unlike unidirectional variants, SMAJ11CAHE3_A/H does not require external series blocking diodes for bipolar protection.
What is the maximum reverse leakage current of SMAJ11CAHE3_A/H at its standoff voltage?
The SMAJ11CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 11 V standoff voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage ensures negligible power drain in always-on automotive modules and preserves signal integrity on high-impedance sensor inputs. Leakage remains below 5 μA up to +85 °C, as confirmed in Vishay's thermal derating curves.
Can SMAJ11CAHE3_A/H be used in place of SMAJ11AHE3_A/H?
No - SMAJ11CAHE3_A/H is bidirectional, while SMAJ11AHE3_A/H is unidirectional and features a cathode band marking. Their clamping behavior differs fundamentally: SMAJ11CAHE3_A/H conducts during both positive and negative transients, whereas SMAJ11AHE3_A/H only clamps in reverse bias and requires external polarity management. Substituting one for the other without circuit review risks unprotected forward surges or unintended conduction paths. Always verify polarity requirements before replacement.
SMAJ11CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 22A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ11CAHE3_A/H FAQ
1.How can I place an order for SMAJ11CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11CAHE3_A/H 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 SMAJ11CAHE3_A/H reliable?
The price and inventory of SMAJ11CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ11CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ11CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11CAHE3_A/H?
SMAJ11CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11CAHE3_A/H 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 SMAJ11CAHE3_A/H?
For technical support, including SMAJ11CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ11CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ11CAHE3_A/H 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 SMAJ11CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ11CAHE3_A/H?
All SMAJ11CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11CAHE3_A/H, 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 SMAJ11CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ11CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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