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Vishay General Semiconductor - Diodes Division SMAJ58AHE3_A/I
- Part No.:
- SMAJ58AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58AHE3_A/I.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,537
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Product details
Overview
SMAJ58AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 58 V stand-off 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, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive ECUs, industrial sensor interfaces, and DC power rail protection.
For engineers reviewing the SMAJ58AHE3_A/I datasheet, SMAJ58AHE3_A/I pinout, SMAJ58AHE3_A/I application, or SMAJ58AHE3_A/I equivalent, this device is selected for robust overvoltage immunity in AEC-Q101-qualified systems where low clamping ratio, fast response (<1 ns), and stable thermal performance up to +150 °C junction temperature are critical.
Technical Context
This unidirectional TVS operates as a reverse-biased avalanche diode, triggering when transient voltage exceeds its VBR threshold and clamping the line to VC within nanoseconds. Its glass-passivated junction ensures stable leakage (<1 μA at 58 V) and repeatable breakdown behavior across temperature (-55 °C to +150 °C).
The device is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports automated SMT placement, and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile - enabling reliable integration into high-volume automotive and industrial PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 58 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 64.4–71.2 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 93.6 V at IPPM = 4.3 A - Peak voltage seen by protected circuit under 10/1000 μs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Surge energy handling capability on 0.2" × 0.2" copper pads; derates to 300 W above 78 V. |
| ID (Reverse Leakage) | ≤1.0 μA at 58 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche junction (reverse-biased connection) | Connected to protected line; clamps positive transients to ground when referenced to anode. |
| Anode | Cathode of internal avalanche junction (reverse-biased connection) | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage events. |
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 1, 2a, 3a/b and IEC 61000-4-5 surge events without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during clamping - critical for protecting 60 V-rated MOSFETs and microcontrollers. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns. |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive surges. Use Value: Limits transient voltage to ≤93.6 V, safeguarding 100 V-rated power management ICs and CAN transceivers in AEC-Q100-compliant designs. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector interface to shunt fast transients before reaching ADC input. Use Value: Sub-1 ns response time and <1 μA leakage preserve signal fidelity while meeting IEC 61000-4-2 Level 4 (15 kV air) requirements. |
| DC-DC Converter Input Stage | Telecom Power Supply Surge Suppression |
|
Use Scenario: Front-end protection for buck converter inputs exposed to 48 V telecom or PoE-derived rails. IC Role / Device Role / Timing Role: Primary clamping device upstream of input filter capacitor and controller IC. Use Value: 400 W rating handles repetitive surges from hot-swap events; 150 °C TJ max enables use in sealed, convection-limited enclosures. |
Use Scenario: Secondary-side transient suppression on -48 V DC distribution boards in base station power systems. IC Role / Device Role / Timing Role: Unidirectional TVS connected cathode-to-rail to suppress negative-going transients induced by relay switching. Use Value: Stable VBR tolerance (±10 %) and low temperature coefficient (0.104 %/°C) ensure consistent clamping across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A-E3/61 | Same electrical specs and SMA package; RoHS-compliant commercial grade (non-AEC-Q101 qualified). | Lacks automotive qualification; suitable for industrial/commercial power supplies where AEC-Q101 is not mandated. | Select when cost-sensitive non-automotive designs require identical clamping performance without qualification overhead. |
| SMBJ58AHE3_A/I | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; 600 W peak pulse power rating. | Higher power handling and lower RθJA (85 °C/W); requires more PCB area and different pad layout. | Choose when surge duty cycle or energy level exceeds SMAJ58AHE3_A/I's 400 W limit, especially in high-repetition industrial motor drives. |
Compared with SMAJ58A-E3/61, the SMAJ58AHE3_A/I adds AEC-Q101 qualification for automotive use; compared with SMBJ58AHE3_A/I, it trades power headroom for compact size and higher board density - making it optimal for space-constrained AEC-Q101 designs.
Availability
SMAJ58AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ58AHE3_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, MOSFETs, and optoelectronics with emphasis on reliability and application-specific performance.
The SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - delivering precise clamping, AEC-Q101 qualification, and robust SMT manufacturability in the SMA footprint.
FAQ
What is the clamping voltage of SMAJ58AHE3_A/I under a 10/1000 μs surge?
The SMAJ58AHE3_A/I exhibits a maximum clamping voltage (VC) of 93.6 V when subjected to its rated peak pulse current of 4.3 A with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 88390 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is SMAJ58AHE3_A/I qualified for automotive applications?
Yes, SMAJ58AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in Revision 09-Jan-2024 of Document 88390. This qualification validates its performance under accelerated stress tests including temperature cycling, humidity bias HAST, and mechanical shock - making SMAJ58AHE3_A/I suitable for under-hood and chassis-mounted automotive modules.
What is the thermal resistance of SMAJ58AHE3_A/I, and how does it affect layout?
SMAJ58AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value assumes minimum recommended pad layout; reducing pad area increases thermal impedance and may limit surge repetition rate. For high-duty-cycle applications, designers should verify junction temperature rise using actual power dissipation and ambient conditions to avoid exceeding the +150 °C maximum rating.
How does the breakdown voltage tolerance of SMAJ58AHE3_A/I impact circuit design?
The SMAJ58AHE3_A/I has a specified VBR range of 64.4 V to 71.2 V at 1 mA test current - a ±5 % tolerance around the nominal 67.8 V midpoint. This variation must be accounted for when setting safety margins relative to protected IC voltage ratings; for example, a 100 V-rated MOSFET remains safely within limits since VC (93.6 V) stays well below its absolute maximum, even at worst-case VBR.
Can SMAJ58AHE3_A/I be used in bidirectional configurations?
No, SMAJ58AHE3_A/I is a unidirectional TVS diode, as indicated by the "A" suffix and cathode band marking. Bidirectional variants carry the "CA" suffix (e.g., SMAJ58CA). Using SMAJ58AHE3_A/I in bidirectional applications would only protect against positive transients; negative excursions would forward-bias the device and potentially cause failure. For symmetrical protection, select SMAJ58CAHE3_A/I instead.
SMAJ58AHE3_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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ58AHE3_A/I FAQ
1.How can I place an order for SMAJ58AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58AHE3_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 SMAJ58AHE3_A/I reliable?
The price and inventory of SMAJ58AHE3_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 SMAJ58AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ58AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58AHE3_A/I?
SMAJ58AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58AHE3_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 SMAJ58AHE3_A/I?
For technical support, including SMAJ58AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58AHE3_A/I requirements.
6.How does Aetrix verify that SMAJ58AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ58AHE3_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 SMAJ58AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ58AHE3_A/I?
All SMAJ58AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58AHE3_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 SMAJ58AHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ58AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ58AHE3_A/I Tags
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