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Vishay General Semiconductor - Diodes Division SMAJ58A-E3/5A
- Part No.:
- SMAJ58A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58A-E3/5A.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:13,861
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Product details
Overview
SMAJ58A-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 58 V standoff voltage (VWM), 64.4–71.2 V breakdown voltage (VBR) at 1 mA, and clamps transients to ≤93.6 V at 4.3 A peak pulse current (IPPM) under 10/1000 μs waveform - ideal for safeguarding MOSFET gates, microcontroller I/O lines, and automotive sensor interfaces.
For engineers reviewing the SMAJ58A-E3/5A datasheet, SMAJ58A-E3/5A pinout, SMAJ58A-E3/5A application, or SMAJ58A-E3/5A equivalent, key selection criteria include its 400 W peak pulse power rating (≤78 V), low 0.057 %/°C VBR temperature coefficient, SMA (DO-214AC) surface-mount package, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown behavior and fast response (<1 ps), while the unidirectional polarity (cathode-banded) enables DC-biased protection without forward conduction during normal operation.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for full 400 W rating. Derating applies above TA = 25 °C per Figure 2, and repetitive surge capability is limited to 0.01 % duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for safe DC bias in protected line |
| VBR (min/max) | 64.4 V / 71.2 V at IT = 1 mA - defines reliable avalanche initiation window; used to verify margin against system overvoltage thresholds |
| VC @ IPPM | ≤93.6 V at 4.3 A - clamping voltage under 10/1000 μs surge; determines maximum stress imposed on downstream ICs |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; confirms suitability for IEC 61000-4-5 Level 3/4 surge events |
| IFSM | 40 A - non-repetitive forward surge current (8.3 ms half-sine); validates resilience to accidental forward polarity faults |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive or industrial ambient environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 2.54 mm lead pitch; compatible with automated pick-and-place and reflow |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band on one end; meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to ground or low-impedance return in unidirectional configuration; must be routed with low-inductance trace |
| Cathode | Protected line connection / avalanche conduction node | Connected directly to the signal or power line being protected; band-marked end; carries full surge current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 surge immunity requirements up to 4 kV (line-to-earth) in properly laid-out PCBs |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sub-20 V logic interfaces |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure - critical for automotive and industrial field life |
| AEC-Q101 qualification option | HE3/HM3 suffix variants meet stress test requirements for automotive electronics, including HTGB, HTRB, and temperature cycling |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead and avoids moisture-induced popcorning |
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 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between signal line and chassis ground, responding within picoseconds to suppress >100 V transients. Use Value: Limits voltage seen by transceiver input to ≤93.6 V, preventing latch-up or gate oxide damage while maintaining signal integrity during normal 58 V max operation. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback, motor drive noise, and ESD in factory automation cabinets. IC Role / Device Role / Timing Role: Parallel-connected TVS on each 24 V DC input channel, clamping surges before they reach optocoupler or Schmitt trigger input stages. Use Value: Absorbs 400 W surge energy without degradation, enabling reliable operation across 100,000+ switching cycles and meeting IEC 61000-4-4 EFT immunity. |
| Power Supply Rail Clamping | Consumer Device USB Port Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom or PoE-powered equipment DC rails subjected to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Standoff-rated clamp across rail-to-ground, activated only during fault conditions exceeding 58 V, with minimal standby leakage (<1 μA). Use Value: Prevents catastrophic failure of downstream DC-DC converters and FETs by limiting rail excursion to 93.6 V, preserving system uptime and safety certification. |
Use Scenario: Protecting USB 2.0 data lines and VBUS pins in portable speakers, monitors, and docking stations from ESD (±15 kV air, ±8 kV contact) and cable-induced transients. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS (anode to ground, cathode to supply) and bidirectional variants on D+/D− lines. Use Value: Clamps VBUS surges to <94 V without affecting 5 V nominal regulation, while maintaining signal integrity due to inherent low junction capacitance (~100 pF at 0 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 |
|---|---|---|---|
| SMAJ58A-M3/5A | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package; same thermal and surge ratings | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects) | Direct drop-in replacement for SMAJ58A-E3/5A when halogen-free bill-of-materials is required |
| SMAJ58AHE3_A/I | AEC-Q101 qualified version; includes extended reliability testing (HTGB, HTRB, TC) and enhanced process controls | Required for automotive ECUs, ADAS sensors, and other AEC-Q101-mandated applications; not suitable for commercial-only use cases | Choose when automotive-grade qualification and traceable lot-level reliability data are mandatory |
Compared with SMAJ58A-E3/5A, the M3/5A offers identical protection performance with halogen-free construction, while the HE3_A/I adds AEC-Q101 validation for automotive deployment - neither requires PCB redesign, but HE3_A/I incurs higher cost and longer lead times.
Availability
SMAJ58A-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power rail clamping, and consumer USB port protection requiring stable component supply and consistent surge performance across production batches.
Supply support for SMAJ58A-E3/5A 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 high-reliability, high-efficiency, and application-specific optimization.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where repeatable clamping, low leakage, and AEC-Q101 readiness are essential design requirements.
FAQ
What is the clamping voltage of SMAJ58A-E3/5A under a 10/1000 μs surge?
The SMAJ58A-E3/5A clamps to a maximum of 93.6 V at its rated peak pulse current of 4.3 A under the standardized 10/1000 μs waveform. This value is measured per Figure 1 and Table 1 in Vishay Document 88390 and represents the upper bound of voltage imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMAJ58A-E3/5A suitable for automotive applications?
SMAJ58A-E3/5A itself is commercial-grade and not AEC-Q101 qualified; however, the functionally identical SMAJ58AHE3_A/I variant is fully AEC-Q101 qualified and shares the same electrical characteristics, package, and pinout. For automotive use, specify the HE3 suffix to ensure compliance with stress testing requirements including temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing.
What is the standoff voltage (VWM) and why does it matter for SMAJ58A-E3/5A?
The standoff voltage VWM of SMAJ58A-E3/5A is 58 V - the maximum DC or RMS voltage that can be continuously applied without exceeding 1 μA reverse leakage current. This parameter ensures the device remains non-conductive during normal operation while providing sufficient margin below the 64.4 V minimum breakdown voltage, preventing false triggering in systems with voltage tolerances or ripple.
How does the SMA package of SMAJ58A-E3/5A affect thermal performance?
The SMA (DO-214AC) package of SMAJ58A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal. To achieve full 400 W pulse rating, PCB layout must follow Vishay's pad dimensions and avoid thermal bottlenecks - inadequate copper area increases junction temperature and reduces surge endurance.
Can SMAJ58A-E3/5A be used in bidirectional configurations?
No - SMAJ58A-E3/5A is explicitly a unidirectional TVS diode, identified by its "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMAJ58CA), which provides symmetrical clamping in both polarities. Using SMAJ58A-E3/5A in reverse-biased AC signal paths would result in forward conduction and potential failure during negative half-cycles.
SMAJ58A-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-E3/5A FAQ
1.How can I place an order for SMAJ58A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58A-E3/5A 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 SMAJ58A-E3/5A reliable?
The price and inventory of SMAJ58A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ58A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58A-E3/5A?
SMAJ58A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58A-E3/5A 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 SMAJ58A-E3/5A?
For technical support, including SMAJ58A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58A-E3/5A requirements.
6.How does Aetrix verify that SMAJ58A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ58A-E3/5A 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 SMAJ58A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ58A-E3/5A?
All SMAJ58A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58A-E3/5A, 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 SMAJ58A-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ58A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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