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Vishay General Semiconductor - Diodes Division SMAJ58CAHE3_A/I
- Part No.:
- SMAJ58CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CAHE3_A/I.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,307
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Product details
Overview
SMAJ58CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal/power lines. It features 58 V standoff voltage (VWM), 64.4–71.2 V breakdown voltage (VBR) at 1 mA, 93.6 V maximum clamping voltage (VC) at 4.3 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMAJ58CAHE3_A/I datasheet, SMAJ58CAHE3_A/I pinout, SMAJ58CAHE3_A/I application, or SMAJ58CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.42), thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding to transients within <1 ps. Its bidirectional symmetry enables suppression of both positive and negative polarity surges without polarity sensitivity, making it suitable for AC-coupled or floating signal paths.
Rated for 400 W peak pulse power (derated to 300 W above 78 V), it sustains repetitive 10/1000 μs surges at 0.01% duty cycle. Junction temperature range spans −55 °C to +150 °C, with thermal resistance from junction-to-ambient at 120 °C/W under standard PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 64.4 V / 71.2 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 93.6 V at 4.3 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum stress level. |
| PPPM | 400 W (10/1000 μs) - Peak transient energy handling capacity; supports robust protection against load-switching spikes. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; optimized for automated placement and reflow. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
| Mounting | 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - Required pad layout to achieve rated 400 W pulse power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides low-impedance path to ground or reference during both positive and negative voltage excursions. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA-type devices; forms symmetrical clamping junction across both terminals. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC or floating lines without external polarity management. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS sensor interfaces under harsh environmental stress. |
| 400 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out on PCB with recommended copper area. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during clamping, reducing stress on downstream ICs such as CAN transceivers or ADC front-ends. |
| MSL Level 1 (260 °C peak) | Permits standard lead-free reflow without moisture-related delamination risk; eliminates pre-bake requirement. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Voltage clamping element placed directly at connector entry point to shunt surge energy before reaching MCU or signal conditioner. Use Value: Maintains signal integrity by limiting transient voltage to ≤93.6 V, preventing latch-up or damage to 5 V or 3.3 V interface ICs. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards without additional active circuitry. |
| Consumer Power Adapter ESD Protection | Telecom Line Card Transient Suppression |
|
Use Scenario: Secondary-side DC output protection in wall adapters and USB PD chargers subjected to user-handling ESD and cable coupling noise. IC Role / Device Role / Timing Role: Fast-response passive clamp on regulated 5 V/9 V/12 V rails, placed after DC-DC converter output filter. Use Value: Absorbs >15 kV contact ESD (IEC 61000-4-2) with sub-nanosecond response, preserving regulation accuracy and preventing brownout resets. |
Use Scenario: Protecting Ethernet PHY interfaces, POTS line drivers, and DSL front-ends from lightning-induced surges on telecom infrastructure equipment. IC Role / Device Role / Timing Role: First-stage transient suppressor on line-side transformer secondary or differential pair termination points. Use Value: Withstands repeated 10/1000 μs surges up to 400 W, extending system uptime in outdoor or central-office deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58CA-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated by OEM or regional regulations. | Choose SMAJ58CAHE3_A/I for standard AEC-Q101 automotive use; select SMAJ58CA-M3/5A only if halogen-free content is contractually required. |
| SMBJ58CAHE3_A/I | Same VWM/VBR/VC ratings but in SMB (DO-214AA) package; 600 W peak pulse power rating (vs. 400 W). | Higher power handling enables longer surge duration tolerance; larger footprint requires PCB layout change. | Use SMBJ58CAHE3_A/I where surge threat level exceeds 400 W or where thermal margin must be increased beyond SMA limits. |
Compared with SMAJ58CAHE3_A/I, SMAJ58CA-M3/5A offers identical protection performance with halogen-free construction, while SMBJ58CAHE3_A/I provides 50% higher pulse power at the cost of larger board area-enabling design flexibility between space-constrained and high-energy surge environments.
Availability
SMAJ58CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card designs requiring stable component supply, AEC-Q101 qualification, and consistent TVS clamping performance across production batches.
Supply support for SMAJ58CAHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems-delivering precise clamping, fast response, and validated stress endurance in compact surface-mount packages.
FAQ
What is the clamping voltage of SMAJ58CAHE3_A/I at its rated peak pulse current?
The SMAJ58CAHE3_A/I exhibits a maximum clamping voltage (VC) of 93.6 V when subjected to its rated peak pulse current (IPPM) of 4.3 A under the standardized 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping behavior is symmetric due to the device's bidirectional construction, ensuring consistent protection regardless of transient polarity. This VC specification is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2.
Is SMAJ58CAHE3_A/I qualified for automotive applications?
Yes, SMAJ58CAHE3_A/I is explicitly AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code and confirmed in the Vishay datasheet footnote (page 3). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its use in automotive powertrain, body control, and ADAS sensor modules. The device meets MSL Level 1 for moisture sensitivity and supports lead-free reflow up to 260 °C. Its bidirectional operation and 58 V standoff make it suitable for 12 V vehicle network protection.
How does the SMAJ58CAHE3_A/I differ from unidirectional SMAJ58A variants?
The SMAJ58CAHE3_A/I is bidirectional, meaning it clamps voltage transients of either polarity across its terminals, with no cathode marking and symmetrical VBR/VC characteristics. In contrast, unidirectional SMAJ58A types feature a cathode band, conduct forward current like a rectifier, and only suppress positive transients when oriented correctly. The "CA" suffix denotes bidirectionality, resulting in identical electrical specs in both directions-critical for protecting AC-coupled lines or floating references where polarity cannot be guaranteed. This distinction is defined in the Vishay document 88390, section "DEVICES FOR BIDIRECTION APPLICATIONS".
What PCB layout guidance applies to SMAJ58CAHE3_A/I to achieve its full 400 W rating?
To achieve the full 400 W peak pulse power rating, SMAJ58CAHE3_A/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet (page 2, note 2). These pads act as heat sinks during transient events; smaller pads reduce thermal mass and cause premature thermal runaway. The SMA (DO-214AC) package's thermal resistance (RθJA = 120 °C/W) assumes this layout. Use internal ground planes and thermal vias beneath pads where possible to further enhance power handling-especially critical in automotive and industrial applications with repetitive surge exposure.
Does SMAJ58CAHE3_A/I have a specified junction capacitance value?
No, the Vishay datasheet for SMAJ58CAHE3_A/I (document 88390, revision 09-Jan-2024) does not list a junction capacitance (CJ) value for this specific part. While Figure 4 shows typical CJ curves for the SMAJ family versus VWM, the plot aggregates data across multiple voltages and does not isolate SMAJ58CA. For signal-line applications sensitive to capacitance (e.g., high-speed data lines), designers should consult Vishay's SPICE models or request characterization data directly, as CJ is highly dependent on applied reverse voltage and is not guaranteed in the standard datasheet for this variant.
SMAJ58CAHE3_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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 4.3A
- 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)
SMAJ58CAHE3_A/I FAQ
1.How can I place an order for SMAJ58CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CAHE3_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 SMAJ58CAHE3_A/I reliable?
The price and inventory of SMAJ58CAHE3_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 SMAJ58CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ58CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CAHE3_A/I?
SMAJ58CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CAHE3_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 SMAJ58CAHE3_A/I?
For technical support, including SMAJ58CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ58CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ58CAHE3_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 SMAJ58CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ58CAHE3_A/I?
All SMAJ58CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CAHE3_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 SMAJ58CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ58CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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