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Vishay General Semiconductor - Diodes Division SMAJ58A-E3/61
- Part No.:
- SMAJ58A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58A-E3/61.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:242,148
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Product details
Overview
SMAJ58A-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection on DC power rails 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 infotainment power supplies, industrial sensor interfaces, and telecom line cards.
For engineers reviewing the SMAJ58A-E3/61 datasheet, SMAJ58A-E3/61 pinout, SMAJ58A-E3/61 application, or SMAJ58A-E3/61 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, thermal resistance data, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The SMAJ58A-E3/61 operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping action begins at VBR ≥ 64.4 V and limits transient energy to ≤ 93.6 V at 4.3 A, enabling reliable protection of downstream MOSFETs and ICs against ISO 7637-2 pulse 1/2a/5a and IEC 61000-4-5 surges.
Thermally, it exhibits RθJA = 120 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 30 °C/W, supporting continuous power dissipation up to 3.3 W at 50 °C ambient. The device is rated for TJ = –55 to +150 °C and meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets safe DC rail margin for 48 V systems. |
| VBR (min/max) | 64.4 V / 71.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on above nominal rail. |
| VC @ IPPM | 93.6 V at 4.3 A - Clamped voltage during 10/1000 μs surge; defines worst-case stress on protected ICs. |
| PPPM | 400 W - Peak pulse power handling per 10/1000 μs waveform; supports repetitive surge events at 0.01% duty cycle. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); validates robustness against inrush or load dump. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 120 °C/W - Thermal resistance junction-to-ambient on standard 5 mm × 5 mm copper pads; informs PCB thermal layout. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE > VBR. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables single-device protection against severe transients like ISO 7637-2 Pulse 5a without external series impedance. |
| 93.6 V clamping voltage at 4.3 A | Provides defined overvoltage ceiling for 5 V–48 V logic and power ICs, reducing need for derating margins. |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1 μA at VWM) across temperature and lifetime. |
| MSL Level 1, 260 °C reflow compatible | Supports standard SMT assembly without moisture sensitivity concerns or baking requirements. |
| AEC-Q101 qualification option (HE3 suffix) | Validates reliability for automotive applications including engine control, ADAS sensors, and body electronics. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before LDOs or DC-DC controllers. Use Value: Limits peak voltage to 93.6 V during 100 V/100 ms load dump events, preventing damage to 100 V-rated power stages. |
Use Scenario: Safeguarding RS-485 transceivers and analog front-ends in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS connected across differential bus lines (A/B) and ground to absorb ESD and fast transients. Use Value: Sub-ns response and 93.6 V clamping prevent latch-up or permanent failure in ±10 V tolerant transceivers during 4 kV contact ESD. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Stage |
|
Use Scenario: Front-end protection on AC/DC converter inputs in DSLAM and ONU equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS on rectified DC bus, coordinated with MOVs and GDTs in multi-stage architecture. Use Value: 400 W rating handles partial energy from 10/700 μs telecom surges while maintaining precise clamping below 100 V. |
Use Scenario: Secondary-side overvoltage clamp in USB PD 3.1 adapters delivering up to 28 V to portable devices. IC Role / Device Role / Timing Role: Unidirectional TVS across output capacitor to protect USB-C controller and load switch during output short-circuit recovery. Use Value: 58 V VWM allows clean operation at 28 V nominal output while clamping fault transients to <94 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58AHE3_A | AEC-Q101 qualified; identical VWM, VBR, VC, and PPPM; RoHS-compliant with halogen-free molding compound. | Required for automotive OEM designs needing PPAP documentation and extended temperature validation. | Select SMAJ58AHE3_A when qualifying for under-hood or safety-critical vehicle subsystems. |
| SMBJ58A-E3/52 | Same VWM/VBR/VC specs but in SMB (DO-214AA) package; 600 W PPPM; RθJA = 90 °C/W; larger footprint (4.6 mm × 3.96 mm vs. 4.5 mm × 2.79 mm). | Better thermal performance and higher surge rating, but requires PCB layout change and increased board area. | Choose SMBJ58A-E3/52 where higher single-pulse robustness (>400 W) or improved thermal management is prioritized over space constraints. |
Compared with SMAJ58A-E3/61, SMAJ58AHE3_A adds automotive qualification without altering electrical behavior, while SMBJ58A-E3/52 trades compact size for greater surge capacity and lower thermal resistance - making the original SMAJ58A-E3/61 optimal for space-constrained industrial and telecom designs requiring commercial-grade reliability.
Availability
SMAJ58A-E3/61 is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial sensor interfaces, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ58A-E3/61 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, rectifiers, TVS devices, and power MOSFETs with emphasis on high-reliability and automotive-grade solutions.
The SMAJ series was engineered for cost-effective, surface-mount transient protection in space-constrained DC power and signal lines across automotive, industrial, and communications infrastructure - balancing clamping precision, surge robustness, and manufacturability.
FAQ
What is the maximum clamping voltage of the SMAJ58A-E3/61 under surge conditions?
The SMAJ58A-E3/61 has a maximum clamping voltage (VC) of 93.6 V at its rated peak pulse current of 4.3 A using the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 100 V-rated downstream components. The SMAJ58A-E3/61 maintains this clamping performance across its full operating temperature range.
Is the SMAJ58A-E3/61 suitable for automotive applications?
The base SMAJ58A-E3/61 is commercial-grade and RoHS-compliant, but not AEC-Q101 qualified. For automotive use, Vishay offers the SMAJ58AHE3_A variant - identical electrically but fully qualified to AEC-Q101 with extended reliability testing. Engineers designing for automotive ECUs, ADAS sensors, or body control modules must specify SMAJ58AHE3_A or SMAJ58AHM3_A to meet OEM requirements. The SMAJ58A-E3/61 itself remains appropriate for non-automotive industrial and telecom applications.
What is the thermal resistance of the SMAJ58A-E3/61, and how does it affect PCB layout?
The SMAJ58A-E3/61 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. This value assumes minimum recommended pad layout per Vishay's DO-214AC outline. To maintain safe junction temperatures under sustained power dissipation, designers should allocate adequate copper area and avoid excessive trace length between the SMAJ58A-E3/61 cathode/anode and their respective ground/power planes. Derating curves in Figure 2 of the datasheet guide thermal design at elevated ambient temperatures.
How does the SMAJ58A-E3/61 differ from bidirectional TVS diodes like SMAJ58CA?
The SMAJ58A-E3/61 is unidirectional and functions only in reverse-bias mode - conducting surge current from cathode to anode when line voltage exceeds VBR. In contrast, SMAJ58CA is bidirectional, providing symmetrical clamping for AC-coupled or floating signal lines. The SMAJ58A-E3/61 includes polarity marking (cathode band) and supports higher peak forward surge current (IFSM = 40 A), whereas SMAJ58CA lacks polarity marking and is rated only for reverse surge. Use SMAJ58A-E3/61 on DC rails with defined ground reference; choose SMAJ58CA for differential buses or AC signals.
What packaging format is used for the SMAJ58A-E3/61, and what does the "/61" suffix indicate?
The SMAJ58A-E3/61 ships in 7-inch plastic tape-and-reel format with 1800 units per reel. The "/61" suffix denotes the preferred package code per Vishay's ordering nomenclature - specifically indicating the 7" reel size and carrier tape configuration compliant with EIA-481 standards. The "E3" portion confirms RoHS-compliance and commercial-grade qualification. This packaging supports high-speed automated placement and is compatible with standard SMT pick-and-place equipment used in volume manufacturing.
SMAJ58A-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ58A-E3/61 FAQ
1.How can I place an order for SMAJ58A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58A-E3/61 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 SMAJ58A-E3/61 reliable?
The price and inventory of SMAJ58A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ58A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58A-E3/61?
SMAJ58A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58A-E3/61 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 SMAJ58A-E3/61?
For technical support, including SMAJ58A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58A-E3/61 requirements.
6.How does Aetrix verify that SMAJ58A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ58A-E3/61 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 SMAJ58A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ58A-E3/61?
All SMAJ58A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58A-E3/61, 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 SMAJ58A-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ58A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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