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Vishay General Semiconductor - Diodes Division SMAJ58CA-E3/61
- Part No.:
- SMAJ58CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CA-E3/61.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,649
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Product details
Overview
SMAJ58CA-E3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. 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 rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the SMAJ58CA-E3/61 datasheet, SMAJ58CA-E3/61 pinout, SMAJ58CA-E3/61 application, or SMAJ58CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HE3 suffix variants), low thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector: under normal conditions it presents high impedance (>1 μA leakage at 58 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
The SMAJ58CA-E3/61 uses a glass-passivated silicon junction and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its 400 W pulse rating applies up to 78 V; above that, derated to 300 W - confirmed by Vishay's Fig. 1 and Note (1) in Document 88390.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping onset |
| VBR (min/max) | 64.4 V / 71.2 V at 1 mA - verified breakdown window ensures predictable turn-on across production lot and temperature |
| VC @ IPPM | 93.6 V at 4.3 A - clamping voltage during 10/1000 μs surge; limits downstream IC stress to safe levels |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; supports repetitive surges at 0.01% duty cycle |
| IFSM | 40 A - non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against inductive kick |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive or industrial enclosures |
| RθJA | 120 °C/W - thermal resistance junction-to-ambient on 0.2" × 0.2" copper pads; informs board-level thermal design |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads. Complies with UL 94 V-0 flammability rating and J-STD-002/JESD 22-B102 solderability standards. Bidirectional construction has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; conducts surge current equally in either direction |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without polarity concerns |
| 400 W peak pulse power (≤78 V) | Withstands common lightning-induced and ESD-related transients per IEC 61000-4-5 and ISO 16750-2 |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic and analog front-ends |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive applications requiring validated reliability and process control |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between signal line and ground, acting as fast-acting shunt during >58 V transients. Use Value: Limits transient voltage to ≤93.6 V, preventing damage to 5 V tolerant transceivers and ensuring ASIL-B functional safety compliance. |
Use Scenario: Shielding digital input modules in programmable logic controllers from field-wiring surges caused by relay coil de-energization or nearby motor switching. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input channels, conducting only during sub-microsecond overvoltage events. Use Value: Maintains system uptime by absorbing 400 W pulses without degradation, eliminating need for external spark gaps or varistors. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors against induced surges on twisted-pair data lines in outdoor network equipment. IC Role / Device Role / Timing Role: Bidirectional clamp across differential pair (e.g., TX+/TX−), referenced to local ground plane. Use Value: Symmetric clamping preserves signal integrity while meeting GR-1089-CORE lightning immunity requirements. |
Use Scenario: Secondary-side overvoltage suppression on 5 V/12 V USB-C or wall adapter outputs exposed to capacitor discharge or feedback loop faults. IC Role / Device Role / Timing Role: Final-stage clamp between output rail and ground, triggered only if regulation fails and voltage exceeds 58 V. Use Value: Prevents fire hazard and user shock risk by limiting fault voltage to 93.6 V within <1 ns response time. |
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 | Unidirectional variant; cathode band marked; same VWM, VBR, VC, and PPPM | Requires correct polarity placement; unsuitable for AC or floating signals | Select when protecting DC rails with known polarity and space-constrained layouts favoring unidirectional footprint reuse |
| SMBJ58CA-T | Same VWM/VC specs but in larger SMB (DO-214AA) package; 600 W PPPM; RθJA = 80 °C/W | Higher power handling and better thermal performance, but occupies ~40% more board area | Choose for higher-reliability industrial systems where surge repetition rate or ambient temperature exceeds SMAJ58CA-E3/61 limits |
Compared with SMAJ58CA-E3/61, the unidirectional SMAJ58A-E3/61 saves cost in polarity-controlled DC designs, while the SMBJ58CA-T trades footprint for enhanced thermal margin and pulse energy capacity - enabling longer surge endurance in harsh environments.
Availability
SMAJ58CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter outputs requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ58CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMAJ series targets board-level transient protection in space-constrained, high-volume applications - balancing surge robustness, SMT manufacturability, and automotive-grade qualification pathways.
FAQ
What is the clamping voltage of the SMAJ58CA-E3/61 under a 10/1000 μs surge?
The SMAJ58CA-E3/61 exhibits a maximum clamping voltage (VC) of 93.6 V at its rated peak pulse current of 4.3 A, measured with a 10/1000 μs waveform per IEC 61000-4-5. This value is guaranteed across temperature and production lots, and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ58CA-E3/61 maintains this clamping performance without degradation under repetitive surges at ≤0.01% duty cycle.
Is the SMAJ58CA-E3/61 suitable for automotive applications?
The SMAJ58CA-E3/61 itself is commercial-grade (RoHS-compliant, E3 suffix), but Vishay offers AEC-Q101-qualified versions under HE3 and HM3 suffixes (e.g., SMAJ58CAHE3_A). These variants undergo extended stress testing for temperature cycling, humidity, and mechanical shock - making them appropriate for engine bay, body control, and ADAS modules. The SMAJ58CA-E3/61 shares identical electrical specs and package with those qualified parts, enabling seamless design-in migration.
How does the bidirectional design of the SMAJ58CA-E3/61 affect PCB layout?
The SMAJ58CA-E3/61 has no polarity marking and symmetric terminal behavior, so PCB layout requires no orientation alignment - simplifying pick-and-place and reducing assembly errors. Unlike unidirectional TVS diodes, it can protect AC-coupled lines (e.g., RS-485, CAN) without additional components or routing constraints. Layout must still follow Vishay's recommended 0.2" × 0.2" copper pad dimensions to ensure rated thermal and pulse power performance for the SMAJ58CA-E3/61.
What is the maximum operating temperature for the SMAJ58CA-E3/61?
The SMAJ58CA-E3/61 has a specified junction temperature range of –55 °C to +150 °C, with derating applied above 25 °C ambient per Figure 2 in Vishay Document 88390. At 100 °C ambient, its peak pulse power drops to ~240 W (60% of rated 400 W). The SMAJ58CA-E3/61 remains fully functional within this range, provided board-level thermal design maintains junction temperature below 150 °C during surge events.
Does the SMAJ58CA-E3/61 require external current-limiting components?
No - the SMAJ58CA-E3/61 operates as a self-limiting shunt device and does not require series resistors or fuses for basic transient suppression. Its low dynamic impedance during conduction naturally limits current based on source impedance and clamped voltage. However, for sustained overvoltage conditions (e.g., failed regulator), a fuse or polyfuse upstream is recommended to prevent thermal runaway. This behavior is intrinsic to the SMAJ58CA-E3/61's silicon junction design and does not rely on external circuitry.
SMAJ58CA-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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ58CA-E3/61 FAQ
1.How can I place an order for SMAJ58CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CA-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 SMAJ58CA-E3/61 reliable?
The price and inventory of SMAJ58CA-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 SMAJ58CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ58CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CA-E3/61?
SMAJ58CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CA-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 SMAJ58CA-E3/61?
For technical support, including SMAJ58CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ58CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ58CA-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 SMAJ58CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ58CA-E3/61?
All SMAJ58CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CA-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 SMAJ58CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ58CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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