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Vishay General Semiconductor - Diodes Division SMAJ58AHE3/5A
- Part No.:
- SMAJ58AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58AHE3/5A.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,904
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Product details
Overview
SMAJ58AHE3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 58 V standoff voltage (VWM), 64.4–71.2 V breakdown range (VBR at 1 mA), 93.6 V maximum clamping voltage (VC) at 4.3 A peak pulse current, and 400 W peak pulse power (10/1000 μs waveform). It is widely deployed to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supply rails.
For engineers reviewing the SMAJ58AHE3/5A datasheet, SMAJ58AHE3/5A pinout, SMAJ58AHE3/5A application, or SMAJ58AHE3/5A equivalent, key selection criteria include its AEC-Q101 qualification, low incremental surge resistance, fast response time (<1 ps), unidirectional polarity with cathode band marking, and compatibility with automated SMT placement on standard PCB pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 58 V), but triggers into low-impedance conduction when transient voltage exceeds VBR, clamping the line to ≤93.6 V. Its glass-passivated junction ensures stable breakdown and long-term reliability under repetitive surge stress.
The device is rated for 40 A non-repetitive forward surge (8.3 ms half-sine) and 4.3 A peak pulse current (10/1000 μs), with thermal resistance of 120 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads. It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 58 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin below clamping threshold. |
| VBR (Breakdown Voltage) | 64.4–71.2 V at 1 mA - Confirmed minimum/maximum voltage at which device enters avalanche conduction; ensures predictable turn-on across production lot. |
| VC (Clamping Voltage) | 93.6 V at IPPM = 4.3 A - Maximum voltage seen by protected circuit during specified 10/1000 μs surge; directly limits stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Surge energy handling capability under standardized waveform; derates to 300 W above 78 V per spec. |
| IFSM (Surge Current) | 40 A (8.3 ms half-sine) - Single-event forward surge rating; validates robustness against inductive switch-off transients in power stages. |
| TJmax | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures without forced cooling. |
| Package | SMA (DO-214AC) - Surface-mount package with 2.54 mm lead pitch, compatible with standard pick-and-place equipment and IPC-7351 footprint. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side connection | Connected to ground or low-voltage reference in unidirectional configuration; must be routed with low-inductance path for effective clamping. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to the line being protected (e.g., 58 V rail); cathode band identifies this terminal visually and on silkscreen. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in engine control, ADAS, and infotainment systems. |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients from load dump or inductive switching without degradation, supporting EN 61000-4-5 compliance in system-level testing. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage overshoot during clamping-critical for protecting 60 V-rated MOSFETs and microcontrollers with tight absolute maximum ratings. |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns and supports single-pass lead-free assembly without baking or special handling. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over time and temperature-essential for long-life industrial and automotive deployments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-connected ECUs from load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and ground, triggered within picoseconds to clamp spikes to ≤93.6 V. Use Value: Prevents latch-up or permanent damage to MCU power inputs and CAN transceivers during 120 V/200 ms load dump events. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) TVS connected across signal and return lines to absorb ESD (IEC 61000-4-2) and cable discharge events. Use Value: Maintains signal integrity by limiting transient-induced offset error and preventing ADC saturation or op-amp input stage damage. |
| DC-DC Converter Input Stage | MOSFET Gate Driver Protection |
|
Use Scenario: Input-side surge suppression for buck/boost converters in telecom power supplies subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping element upstream of input filter capacitor; absorbs energy before it reaches controller IC and FETs. Use Value: Enables compliance with ITU-T K.20/21 immunity requirements by limiting input rail excursion to <95 V during 10/1000 μs surges. |
Use Scenario: Gate-source protection of high-side N-channel MOSFETs in motor drive half-bridges exposed to shoot-through or Miller-induced spikes. IC Role / Device Role / Timing Role: Unidirectional TVS tied between gate and source, clamping negative-going transients that could exceed VGS rating. Use Value: Prevents gate oxide rupture by limiting VGS to ≤±93.6 V during fast dv/dt events, extending FET lifetime in PWM-driven systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A-E3/5A | Same electrical specs and package; RoHS-compliant commercial grade (non-AEC-Q101). | Lacks automotive qualification; suitable for consumer, computing, and non-safety-critical industrial use. | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive traceability. |
| SMAJ58AHM3/5A | Halogen-free, RoHS-compliant, AEC-Q101 qualified-identical clamping and surge performance. | Meets stricter environmental mandates (e.g., EU automotive OEM halogen bans) without sacrificing protection level. | Choose for Tier 1 automotive programs requiring halogen-free materials and full PPAP documentation support. |
Compared with SMAJ58AHE3/5A, the SMAJ58A-E3/5A offers identical protection performance at lower qualification cost, while SMAJ58AHM3/5A adds halogen-free compliance for environmentally constrained automotive platforms-both retain the same SMA footprint and clamping behavior.
Availability
SMAJ58AHE3/5A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, DC-DC converter input staging, and MOSFET gate driver safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMAJ58AHE3/5A 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMAJ series was engineered for high-reliability transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where failure due to voltage surges is unacceptable.
FAQ
What is the clamping voltage of SMAJ58AHE3/5A at its rated peak pulse current?
The SMAJ58AHE3/5A has a maximum clamping voltage (VC) of 93.6 V at 4.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and guarantees the protected circuit will not experience more than 93.6 V during such a transient event. The SMAJ58AHE3/5A maintains this clamping performance across its qualified temperature range and lifetime.
Is SMAJ58AHE3/5A suitable for automotive applications?
Yes, SMAJ58AHE3/5A is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validated reliability testing (including temperature cycling and HTRB) make it appropriate for engine control units, body electronics, and ADAS modules. The SMAJ58AHE3/5A meets ISO 16750-2 load dump requirements when properly applied with adequate PCB copper area.
How does the standoff voltage (VWM) of SMAJ58AHE3/5A relate to its breakdown voltage (VBR)?
The SMAJ58AHE3/5A has a VWM of 58 V and a VBR range of 64.4–71.2 V at 1 mA test current. This 6.4–13.2 V margin ensures the device remains fully off during normal operation, with leakage limited to ≤1.0 μA at 58 V, while reliably triggering into clamping mode once transients exceed the lower bound of VBR. This design margin prevents false triggering and supports stable biasing in 58 V nominal systems.
What is the thermal resistance of SMAJ58AHE3/5A, and how does it affect layout?
The SMAJ58AHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained power dissipation, PCB layout must provide at least this pad area-and larger copper pours improve heat spreading. The SMAJ58AHE3/5A's RθJL of 30 °C/W further emphasizes the importance of short, wide traces to ground planes for optimal thermal performance.
Can SMAJ58AHE3/5A be used in bidirectional configurations?
No, SMAJ58AHE3/5A is a unidirectional TVS diode, identified by its cathode band marking. For bidirectional protection, Vishay offers the SMAJ58CA series (e.g., SMAJ58CAHE3/5A), which provides symmetrical clamping in both polarities. Using SMAJ58AHE3/5A in reverse-biased mode risks permanent damage, as it is not rated for reverse conduction beyond its specified leakage. Always verify polarity during placement-the SMAJ58AHE3/5A must be oriented with cathode toward the protected line.
SMAJ58AHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMAJ58AHE3/5A FAQ
1.How can I place an order for SMAJ58AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58AHE3/5A 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 SMAJ58AHE3/5A reliable?
The price and inventory of SMAJ58AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ58AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58AHE3/5A?
SMAJ58AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58AHE3/5A 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 SMAJ58AHE3/5A?
For technical support, including SMAJ58AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58AHE3/5A requirements.
6.How does Aetrix verify that SMAJ58AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ58AHE3/5A 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 SMAJ58AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ58AHE3/5A?
All SMAJ58AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58AHE3/5A, 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 SMAJ58AHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ58AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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