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Vishay General Semiconductor - Diodes Division SMAJ58AHE3/61
- Part No.:
- SMAJ58AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58AHE3/61.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ58AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 58 V standoff voltage (VWM), 64.4–71.2 V breakdown range at 1 mA, 93.6 V maximum clamping voltage at 4.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients in automotive and industrial control systems.
For engineers reviewing the SMAJ58AHE3/61 datasheet, SMAJ58AHE3/61 pinout, SMAJ58AHE3/61 application, or SMAJ58AHE3/61 equivalent, key selection criteria include its AEC-Q101 qualification, SMA (DO-214AC) package compatibility, unidirectional polarity with cathode band marking, and verified clamping performance under repetitive surge conditions up to 150 °C junction temperature.
Technical Context
This TVS diode operates as a fast-acting shunt protector: when reverse voltage exceeds VWM = 58 V, it avalanches into low-impedance conduction to clamp transient energy within 1 ns response time. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance (< 22 Ω typical), enabling effective suppression of ESD, lightning-induced surges, and load-dump spikes.
The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine), supports 3.3 W steady-state power dissipation on infinite heatsink, and maintains thermal stability via RθJA = 120 °C/W and RθJL = 30 °C/W - confirming suitability for compact PCB layouts with localized copper pad thermal relief per JEDEC standard mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 58 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 64.4–71.2 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on across temperature and unit variation. |
| VC (Clamping Voltage) | 93.6 V at IPPM = 4.3 A - Peak voltage seen by protected circuit during 10/1000 μs transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W - Sustained surge energy handling capability under standardized waveform; derates to 300 W above 78 V. |
| IFSM (Surge Current) | 40 A - Single half-sine (8.3 ms) forward surge rating; validates robustness against load-dump events in automotive 12 V systems. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood or industrial ambient environments without derating. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 0.208" x 0.157" footprint; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or lower-potential rail in unidirectional configuration; forms return path during clamping. |
| Cathode | Reverse voltage sensing / high-side terminal | Connected to protected line (e.g., 12 V supply or signal trace); avalanche conduction initiates here upon overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, body electronics, and ADAS modules. |
| 400 W peak pulse power (10/1000 μs) | Provides industry-standard surge immunity per ISO 7637-2 and IEC 61000-4-5 Level 3; sustains repeated transients without degradation. |
| 1 ns response time | Ensures clamping activation before sensitive CMOS or microcontroller inputs experience damaging overvoltage - critical for high-speed data lines and power rails. |
| Low incremental surge resistance | Typical < 22 Ω limits voltage overshoot during fast-rising transients, improving protection margin for 3.3 V or 5 V logic interfaces. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates baking requirement and streamlines SMT production. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (up to 120 V, 400 ms) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power input and ground, clamping surges before they reach LDOs or MCU power pins. Use Value: Maintains system uptime by preventing latch-up or permanent damage to voltage regulators and microcontrollers during vehicle ignition cycles. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector entry point, diverting sub-100 ns ESD pulses away from op-amp input stages. Use Value: Preserves measurement accuracy and prevents sensor calibration drift caused by transient-induced input stage overstress. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier and controller ICs against line surges and lightning-induced spikes. IC Role / Device Role / Timing Role: Fast-response TVS placed across bulk capacitor input, absorbing 6 kV/3 kA combination wave surges per IEC 61000-4-5. Use Value: Eliminates need for larger MOVs or gas discharge tubes, reducing BOM cost and board space while meeting UL 62368-1 safety requirements. |
Use Scenario: Protecting Ethernet PHY and PoE interface circuits on telecom base station line cards from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS integrated into front-end protection network alongside common-mode chokes and GDTs. Use Value: Enables compliance with GR-1089-CORE Level 4 (10/700 μs, 10 kV) without compromising signal integrity on 100BASE-TX or 1000BASE-T links. |
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-E3/61 | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and package. | Not suitable for automotive OEM or Tier-1 designs requiring automotive reliability certification. | Select when cost-sensitive industrial or consumer applications do not require automotive qualification. |
| SMAJ58CAHE3/61 | Bidirectional variant; symmetric breakdown (±64.4–71.2 V); same VC and PPPM. | Required for AC-coupled or floating signal lines where polarity reversal occurs (e.g., RS-485, CAN bus). | Choose for bidirectional signal protection; avoid for DC power rail use due to unnecessary reverse conduction path. |
Compared with SMAJ58A-E3/61, the SMAJ58AHE3/61 adds AEC-Q101 validation for automotive deployment, while SMAJ58CAHE3/61 trades unidirectional polarity for symmetrical clamping - making the original part optimal for cost-constrained, high-reliability DC power line protection where polarity is fixed and certification is mandatory.
Availability
SMAJ58AHE3/61 is available at Aetrix Electronics and suitable for automotive control units, industrial sensor nodes, and telecom power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ58AHE3/61 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, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and communications infrastructure where failure tolerance and repeatable clamping performance are mission-critical.
FAQ
What is the clamping voltage of SMAJ58AHE3/61 at its rated peak pulse current?
The SMAJ58AHE3/61 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 defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream components like 100 V-rated MOSFETs remain within safe operating area.
Is SMAJ58AHE3/61 suitable for automotive applications?
Yes, SMAJ58AHE3/61 is AEC-Q101 qualified, meaning it has passed rigorous stress tests for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its use in automotive powertrain, chassis, and body electronics. The "HE3" suffix explicitly denotes this qualification, distinguishing it from commercial-grade variants like SMAJ58A-E3/61.
What does the "HE3" suffix mean in SMAJ58AHE3/61?
The "HE3" suffix in SMAJ58AHE3/61 indicates RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability standards. It replaces the older "HM3" halogen-free variant and confirms compliance with both environmental regulations and automotive reliability requirements - essential for Tier-1 supplier documentation and PPAP submissions.
How does SMAJ58AHE3/61 differ from SMAJ58CAHE3/61?
SMAJ58AHE3/61 is unidirectional with cathode-band polarity, optimized for DC power line protection, whereas SMAJ58CAHE3/61 is bidirectional with symmetrical breakdown (±64.4–71.2 V), intended for AC or floating signal lines like RS-485 or CAN. Both share identical package, clamping voltage, and peak power rating, but their polarity architecture dictates distinct placement and grounding strategies in circuit design.
What is the thermal resistance of SMAJ58AHE3/61, and how does it affect PCB layout?
SMAJ58AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain TJ ≤ 150 °C under 3.3 W steady-state dissipation, designers must provide minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - as specified in Vishay's recommended mounting layout - to ensure adequate heat spreading and avoid thermal runaway during sustained overload conditions.
SMAJ58AHE3/61 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)
SMAJ58AHE3/61 FAQ
1.How can I place an order for SMAJ58AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58AHE3/61 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 SMAJ58AHE3/61 reliable?
The price and inventory of SMAJ58AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ58AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58AHE3/61?
SMAJ58AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58AHE3/61 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 SMAJ58AHE3/61?
For technical support, including SMAJ58AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58AHE3/61 requirements.
6.How does Aetrix verify that SMAJ58AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ58AHE3/61 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 SMAJ58AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ58AHE3/61?
All SMAJ58AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58AHE3/61, 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 SMAJ58AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ58AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ58AHE3/61 Tags
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