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Vishay General Semiconductor - Diodes Division SMAJ90CAHE3_A/I
- Part No.:
- SMAJ90CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CAHE3_A/I.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,534
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Product details
Overview
SMAJ90CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust ESD and surge protection on signal/power lines. It features a 90 V standoff voltage (VWM), 100–111 V breakdown range (VBR), 146 V maximum clamping voltage (VC) at 2.1 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting automotive and industrial sensor interface protection.
For engineers reviewing the SMAJ90CAHE3_A/I datasheet, SMAJ90CAHE3_A/I pinout, SMAJ90CAHE3_A/I application, or SMAJ90CAHE3_A/I equivalent, this device is evaluated for bidirectional overvoltage clamping in CAN bus interfaces, automotive body control modules, and industrial I/O protection where AEC-Q101 qualification, low leakage (<1.0 μA at VWM), and fast response (<1.0 ns) are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical breakdown (VBR min/max = 100–111 V) and clamping (VC = 146 V) characteristics in either direction. Its glass-passivated junction ensures stable leakage performance (ID ≤ 1.0 μA at 90 V) and low incremental surge resistance, enabling precise voltage limiting during transients induced by inductive switching or lightning surges.
The device is rated for 400 W peak pulse power (10/1000 μs) up to 78 V and derates to 300 W above 78 V per Vishay's specification curve. With a maximum junction temperature of +150 °C and thermal resistance RθJA = 120 °C/W, it supports reliable operation in high-temperature automotive under-hood environments when mounted on recommended 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 100 V / 111 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 146 V @ 2.1 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to safe levels. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak surge energy handling capability; determines survivability against ISO 7637-2 Pulse 1/2/5a. |
| ID @ VWM | ≤1.0 μA - Reverse leakage at rated standoff; minimizes standby power loss and avoids false triggering. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in engine control units and powertrain modules. |
| Package | SMA (DO-214AC) - Surface-mount, low-profile package compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C reflow peak), RoHS-compliant and AEC-Q101 qualified. Bidirectional construction has no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | Either terminal serves as input/output; no cathode band marking; enables placement without orientation check. |
| Case | Thermal and mechanical anchor | Plastic body provides electrical isolation; copper pad layout (5.0 mm × 5.0 mm per terminal) required for rated PPPM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| 400 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients, protecting 100 V-rated MOSFETs and CAN transceivers. |
| 1.0 μA max reverse leakage @ 90 V | Prevents signal distortion and power drain in always-on sensor bias networks and LIN/CAN standby modes. |
| Fast response time (<1.0 ns) | Clamps before transient energy couples into protected ICs, meeting stringent EMC immunity requirements. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting CAN_H/CAN_L lines in vehicle body control modules against load dump and ESD. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point. Use Value: Limits transient voltage to ≤146 V, preserving integrity of ISO 11898-2 compliant transceivers without adding series impedance. |
Use Scenario: Shielding 4–20 mA analog output lines in PLC I/O modules from field-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across signal and return paths to shunt surge energy. Use Value: Maintains <1.0 μA leakage at 24 V system rail, avoiding calibration drift while surviving 4 kV EFT bursts. |
| Automotive Body Electronics | Consumer Appliance Motor Driver Protection |
|
Use Scenario: Safeguarding microcontroller GPIOs driving door lock actuators subject to inductive kickback. IC Role / Device Role / Timing Role: Localized TVS at actuator driver output stage. Use Value: Clamps 100 V transients within nanoseconds, preventing latch-up in 5 V logic-level MCUs per AEC-Q100 Grade 2. |
Use Scenario: Suppressing commutation spikes on BLDC motor driver power rails in smart home appliances. IC Role / Device Role / Timing Role: DC bus TVS across VDD and GND near gate drivers. Use Value: Handles 300 W surges above 78 V, enabling compact design without external heat sinking in space-constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CAHM3_A/I | Halogen-free variant; identical electrical specs and AEC-Q101 qualification. | No difference in circuit behavior or reliability; selected only for halogen-free compliance programs. | Choose SMAJ90CAHM3_A/I if RoHS + halogen-free material declaration is required for final product certification. |
| SMCJ90CAHE3_A/I | Higher power rating (1500 W vs. 400 W); same VWM/VBR/VC but larger SMC (DO-214AB) package. | Used where higher surge immunity (e.g., ISO 16750-2 Class III/IV) is mandated, requiring PCB area for larger footprint. | Choose SMCJ90CAHE3_A/I only when 1500 W surge capability is explicitly required and board space permits SMC package. |
Compared with SMAJ90CAHE3_A/I, SMAJ90CAHM3_A/I offers identical protection performance with halogen-free materials, while SMCJ90CAHE3_A/I trades compact size for 3.75× higher surge power-neither is pin-compatible due to different package outlines (SMA vs. SMC), requiring layout revision.
Availability
SMAJ90CAHE3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer appliance motor control systems requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMAJ90CAHE3_A/I 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 optoelectronics with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMAJ series is engineered specifically for surface-mount transient suppression in automotive and industrial environments, balancing compact size, AEC-Q101 compliance, and robust 400 W surge handling in the SMA package.
FAQ
What does the "CA" suffix indicate in SMAJ90CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration: SMAJ90CAHE3_A/I conducts and clamps symmetrically in both forward and reverse directions, making it suitable for AC-coupled or differential signal lines like CAN bus where polarity is undefined. This differs from unidirectional "A" variants that require correct cathode orientation and only clamp in reverse bias.
Is SMAJ90CAHE3_A/I qualified for automotive applications?
Yes, SMAJ90CAHE3_A/I is AEC-Q101 qualified per Vishay's ordering code convention ("HE3" suffix), confirming validation for automotive-grade reliability including temperature cycling, humidity testing, and surge endurance. It is commonly deployed in body control modules, lighting drivers, and sensor interfaces meeting ISO 16750 and ISO 7637-2 requirements.
What is the maximum clamping voltage of SMAJ90CAHE3_A/I and at what current is it specified?
The maximum clamping voltage (VC) of SMAJ90CAHE3_A/I is 146 V, measured at a peak pulse current (IPPM) of 2.1 A using the standardized 10/1000 μs double-exponential waveform. This value defines the worst-case voltage seen by downstream components during a surge event and is critical for ensuring compatibility with 100 V-rated ICs.
How does the thermal performance of SMAJ90CAHE3_A/I affect its surge capability?
SMAJ90CAHE3_A/I has a junction-to-ambient thermal resistance (RθJA) of 120 °C/W. At elevated ambient temperatures, its peak pulse power must be derated per Figure 2 in the datasheet-e.g., at TA = 85 °C, its 400 W rating reduces to ~260 W. Proper copper pad sizing (0.2" × 0.2") is essential to maintain rated performance and avoid thermal runaway during repetitive surges.
Can SMAJ90CAHE3_A/I replace SMAJ90AHE3_A/I in a design?
No-SMAJ90CAHE3_A/I is bidirectional while SMAJ90AHE3_A/I is unidirectional. Substituting them requires verifying circuit topology: unidirectional parts need correct cathode orientation and only protect against reverse-polarity transients, whereas SMAJ90CAHE3_A/I protects both polarities but exhibits higher leakage in DC-biased applications. Layout and schematic review is mandatory before replacement.
SMAJ90CAHE3_A/I 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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 2.1A
- Power - Peak Pulse:
- 300W
- 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)
SMAJ90CAHE3_A/I FAQ
1.How can I place an order for SMAJ90CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CAHE3_A/I 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 SMAJ90CAHE3_A/I reliable?
The price and inventory of SMAJ90CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ90CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ90CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CAHE3_A/I?
SMAJ90CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CAHE3_A/I 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 SMAJ90CAHE3_A/I?
For technical support, including SMAJ90CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ90CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ90CAHE3_A/I 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 SMAJ90CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ90CAHE3_A/I?
All SMAJ90CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CAHE3_A/I, 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 SMAJ90CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ90CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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