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Vishay General Semiconductor - Diodes Division SMAJ58CA-E3/5A
- Part No.:
- SMAJ58CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CA-E3/5A.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,589
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Product details
Overview
SMAJ58CA-E3/5A 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 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 (10/1000 μs waveform). It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power supply interfaces.
For engineers reviewing the SMAJ58CA-E3/5A datasheet, SMAJ58CA-E3/5A pinout, SMAJ58CA-E3/5A application, or SMAJ58CA-E3/5A equivalent, this device serves as a robust, AEC-Q101-qualified (via HE3/HM3 variants) bidirectional surge protector with low clamping ratio, fast response time, and MSL Level 1 moisture sensitivity - critical for automotive body control modules, industrial PLC I/O protection, and telecom DC power rail hardening.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior for positive and negative transients. Its glass-passivated junction ensures stable leakage (<1.0 μA at 58 V) and repeatable breakdown characteristics over temperature (-55 °C to +150 °C).
The device uses a planar silicon avalanche structure optimized for low incremental surge resistance (rd) and minimal capacitance (~100 pF at 0 V), enabling effective suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5) without distorting high-speed signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 64.4 V / 71.2 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events without premature leakage. |
| VC @ IPPM | 93.6 V at 4.3 A - Clamped voltage under 10/1000 μs surge; limits downstream component stress to ≤93.6 V during 400 W transient. |
| PPPM | 400 W - Peak pulse power handling capability with standard 10/1000 μs waveform; supports repetitive surge duty cycle up to 0.01 %. |
| IPPM | 4.3 A - Peak pulse current corresponding to VC; determines minimum PCB trace width and layout thermal design. |
| Junction Temp Range | -55 °C to +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures without derating. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (unmarked end) | One side of symmetrical bidirectional junction; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Cathode | Terminal 2 (unmarked end) | Other side of symmetrical bidirectional junction; connects to same line (e.g., CAN_L or RS-485 B); no polarity marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance for ± transients - eliminates need for dual unidirectional devices in differential lines. |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) on 12 V/24 V systems without failure. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure to protected ICs - e.g., keeps microcontroller I/O pins below absolute max rating during surge. |
| AEC-Q101 qualification path | HE3/HM3 variants available - enables direct use in automotive powertrain and chassis modules requiring qualified components. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile (peak 260 °C) - reduces manufacturing risk and avoids baking requirements. |
Applications
| Automotive Body Control Module | Industrial RS-485 Communication Port |
|---|---|
Use Scenario: Protects LIN/CAN signal lines from load dump and alternator ripple in door module ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground to clamp ± transients before reaching transceiver IC. Use Value: Maintains signal integrity during 12 V system load dump (ISO 7637-2 Pulse 5a) by limiting voltage to ≤93.6 V at 4.3 A. |
Use Scenario: Shields RS-485 transceivers in factory automation controllers from ESD and cable discharge events. IC Role / Device Role / Timing Role: Differential pair protector across A/B lines, referenced to local ground, absorbing common-mode surges. Use Value: Prevents latch-up or permanent damage to MAX1487-level transceivers during 8 kV contact ESD (IEC 61000-4-2) due to sub-1 ns response. |
| Telecom DC Power Input | Consumer Appliance Motor Drive Board |
Use Scenario: Guards 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary front-end clamp on DC input rail, upstream of DC/DC converter and hot-swap controller. Use Value: Limits surge energy to <100 mJ per event (per 10/1000 μs), preventing fuse blowout while maintaining 58 V nominal operation. |
Use Scenario: Safeguards MCU GPIOs and gate drivers from inductive kickback when controlling BLDC fan motors. IC Role / Device Role / Timing Role: Localized protection at motor driver IC outputs and microcontroller analog sensing nodes. Use Value: Suppresses 600 V/100 ns spikes from flyback diodes, keeping ADC reference rails within ±1% accuracy during commutation. |
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 | Unidirectional variant; cathode-marked; VF = 3.5 V at 25 A forward conduction. | Requires correct polarity placement; unsuitable for AC-coupled or differential lines without external biasing. | Select only when protecting single-polarity rails (e.g., 12 V supply to MCU) where reverse conduction is not needed. |
| SMBJ58CA-T | Same VWM/VC specs but in SMB (DO-214AA) package; 400 W rating derated to 300 W above 78 V. | Larger 6.2 mm × 4.6 mm footprint; higher thermal resistance (RθJA = 110 °C/W vs. 120 °C/W) but better surge margin at high ambient. | Prefer when board space allows larger pad layout and higher sustained surge energy tolerance is required. |
Compared with SMAJ58A-E3/5A, the SMAJ58CA-E3/5A enables polarity-agnostic placement on differential buses; compared with SMBJ58CA-T, it offers tighter board area usage at the cost of slightly lower thermal mass - making it optimal for space-constrained automotive modules.
Availability
SMAJ58CA-E3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial communication ports, telecom power inputs, and consumer appliance motor controls requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ58CA-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 reliability and automotive-grade qualification.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of SMAJ58CA-E3/5A under a 10/1000 μs surge?
The SMAJ58CA-E3/5A has a maximum clamping voltage (VC) of 93.6 V at 4.3 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per JEDEC test conditions and ensures predictable overvoltage limiting for downstream ICs. The clamping performance remains consistent across both polarities due to its bidirectional architecture, and the SMAJ58CA-E3/5A maintains this specification across its full operating temperature range (-55 °C to +150 °C).
Is SMAJ58CA-E3/5A suitable for automotive applications?
Yes, SMAJ58CA-E3/5A is RoHS-compliant and manufactured to commercial-grade specifications; AEC-Q101-qualified versions are available under ordering codes SMAJ58CAHE3_X (e.g., HE3_A) for automotive use. While the base SMAJ58CA-E3/5A itself is not AEC-Q101 certified, its construction - including glass-passivated junction, MSL Level 1 rating, and -55 °C to +150 °C junction temperature range - aligns with automotive environmental requirements. Engineers should specify HE3 or HM3 suffix variants when AEC-Q101 compliance is contractually required for the SMAJ58CA-E3/5A family.
How does SMAJ58CA-E3/5A differ from SMAJ58A-E3/5A?
The SMAJ58CA-E3/5A is bidirectional, with symmetrical breakdown and clamping behavior in both directions and no polarity marking; the SMAJ58A-E3/5A is unidirectional, featuring a cathode band and forward voltage drop (VF = 3.5 V at 25 A). This makes SMAJ58CA-E3/5A ideal for differential signal lines like CAN or RS-485, whereas SMAJ58A-E3/5A suits single-rail DC protection. Both share identical VWM (58 V), VBR, and PPPM ratings, but only SMAJ58CA-E3/5A supports AC or bipolar transient suppression without external circuitry.
What is the thermal resistance of SMAJ58CA-E3/5A?
The SMAJ58CA-E3/5A 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, and a junction-to-lead resistance (RθJL) of 30 °C/W. These values assume standard JEDEC test board conditions and directly impact power derating above 25 °C ambient. For example, at 85 °C ambient, the device's 3.3 W steady-state power dissipation must be reduced by ~50 % to maintain TJ ≤ 150 °C - a key consideration in sealed industrial enclosures where the SMAJ58CA-E3/5A operates continuously near its thermal limit.
Does SMAJ58CA-E3/5A require special PCB layout considerations?
Yes - to achieve rated 400 W pulse power, SMAJ58CA-E3/5A must be mounted on minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, with short, wide traces to minimize inductance. Long or narrow traces increase VC during fast transients and reduce effective surge handling. The SMAJ58CA-E3/5A also benefits from ground-plane proximity beneath the device to enhance heat spreading and reduce impedance. Avoid placing vias or connectors near the SMAJ58CA-E3/5A pads, as parasitic inductance degrades clamping response for sub-100 ns ESD events.
SMAJ58CA-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:
- -
- 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-E3/5A FAQ
1.How can I place an order for SMAJ58CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CA-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 SMAJ58CA-E3/5A reliable?
The price and inventory of SMAJ58CA-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 SMAJ58CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ58CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CA-E3/5A?
SMAJ58CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CA-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 SMAJ58CA-E3/5A?
For technical support, including SMAJ58CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CA-E3/5A requirements.
6.How does Aetrix verify that SMAJ58CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ58CA-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 SMAJ58CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ58CA-E3/5A?
All SMAJ58CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CA-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 SMAJ58CA-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ58CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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