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Vishay General Semiconductor - Diodes Division SMAJ58CA-M3/5A
- Part No.:
- SMAJ58CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CA-M3/5A.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ58CA-M3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 58 V standoff voltage (VWM), 64.4–71.2 V breakdown range (VBR at 1 mA), clamps to ≤93.6 V at 4.3 A peak pulse current (IPPM), and delivers 400 W peak pulse power (10/1000 μs waveform) - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the SMAJ58CA-M3/5A datasheet, SMAJ58CA-M3/5A pinout, SMAJ58CA-M3/5A application, or SMAJ58CA-M3/5A equivalent, key selection criteria include bidirectional clamping behavior, 150 °C max junction temperature, halogen-free RoHS-compliant M3 termination, and compatibility with automated SMT placement on DO-214AC (SMA) footprint.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding VWM = 58 V, it avalanches symmetrically in both directions to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at VWM), while thermal resistance RθJA = 120 °C/W supports operation up to 150 °C junction temperature under defined PCB pad conditions.
The SMAJ58CA-M3/5A complies with AEC-Q101 when ordered with HE3/HM3 suffixes, but the M3/5A variant is commercial-grade. It meets UL 497B recognition (QVGQ2) and J-STD-020 MSL Level 1, enabling reflow up to 260 °C peak without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 64.4 V / 71.2 V at 1 mA - guaranteed avalanche onset window defining protection threshold tolerance |
| VC @ IPPM | ≤93.6 V at 4.3 A - clamped voltage limiting stress on downstream ICs during 10/1000 μs surge |
| PPPM | 400 W - peak transient power handling capability per standard waveform, derated above 78 V |
| IFSM | 40 A - non-repetitive forward surge rating (8.3 ms half-sine), relevant for unidirectional testing only |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive or high-ambient industrial environments |
| Package | SMA (DO-214AC) - standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity not marked for bidirectional types (SMAJ58CA).
| 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 - no polarity marking required on device body |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on properly laid out PCBs with 5 mm × 5 mm pads |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance requirements for global electronics manufacturing without compromising solderability |
| MSL Level 1, 260 °C peak reflow | Eliminates bake-out requirement and supports standard lead-free assembly processes |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, inductive kick) |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS placed directly at connector interface to clamp transients before reaching PHY layer. Use Value: Maintains signal integrity by limiting voltage to ≤93.6 V during 400 W surges, preventing latch-up or gate oxide damage in 5 V/12 V sensor front-ends. |
Use Scenario: Safeguarding PLC digital input cards against field-wiring induced surges from relay coils or motor drives. IC Role / Device Role / Timing Role: Bidirectional clamping element across isolated input terminals to suppress common-mode and differential transients. Use Value: Enables reliable 24 V DC input operation with <1.0 μA leakage at 58 V, minimizing false triggering in high-impedance sensing circuits. |
| Telecom Line Interface | Consumer USB/Display Port ESD Guard |
|
Use Scenario: Protecting Ethernet PHY magnetics secondary side and RS-485 transceiver pins from lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on data line pairs, coordinated with GDT or polymer PTC for multi-stage protection. Use Value: Fast response (<1 ns) and symmetric clamping ensure balanced differential signaling remains intact during 10/1000 μs threats up to 4 kV. |
Use Scenario: Secondary ESD suppression on USB 2.0 D+/D− or DisplayPort AUX channel traces near connectors. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical at 0 V) shunt device absorbing ±8 kV contact discharge per IEC 61000-4-2. Use Value: Clamps to <94 V within nanoseconds while adding negligible signal distortion - critical for high-speed serial 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-M3/5A | Unidirectional; cathode band marked; VF = 3.5 V at 25 A forward conduction | Requires polarity-aware layout; suitable only for DC-biased lines with defined ground reference | Select when protecting unidirectional power rails or logic outputs where forward conduction path matters |
| SMBJ58CA-T3 | Same VWM/VC, but SMB (DO-214AA) package - 20 % larger footprint, lower RθJA (90 °C/W) | Better thermal performance under sustained surge duty; requires larger PCB area | Choose for higher reliability in thermally constrained designs or repetitive surge environments |
Compared with SMAJ58A-M3/5A, the SMAJ58CA-M3/5A eliminates polarity dependency for floating interfaces; compared with SMBJ58CA-T3, it trades thermal margin for space savings in dense layouts - making SMAJ58CA-M3/5A optimal for compact, bidirectional signal line protection.
Availability
SMAJ58CA-M3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O modules, telecom line protection, and consumer port-level ESD guard circuits requiring stable component supply and halogen-free compliance.
Supply support for SMAJ58CA-M3/5A 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMAJ series targets board-level transient protection in cost-sensitive, high-volume applications - engineered for fast response, repeatable clamping, and seamless integration into automated SMT lines.
FAQ
What does the "CA" suffix mean in SMAJ58CA-M3/5A?
The "CA" suffix denotes a bidirectional configuration: SMAJ58CA-M3/5A functions identically in both polarities, with symmetric breakdown and clamping characteristics. Unlike unidirectional variants (e.g., SMAJ58A), it has no cathode marking and is used where signal lines lack fixed DC bias - such as AC-coupled data buses or floating sensor outputs. This makes SMAJ58CA-M3/5A ideal for protecting differential pairs or transformer-isolated interfaces without polarity constraints.
Is SMAJ58CA-M3/5A qualified to AEC-Q101?
No - SMAJ58CA-M3/5A carries the commercial-grade M3 suffix (halogen-free, RoHS-compliant), not the HM3 or HE3 automotive qualification suffixes. AEC-Q101 qualification applies only to variants explicitly ordered with HM3_X or HE3_X suffixes (e.g., SMAJ58CAHM3_A/I). For automotive applications requiring qualification, specify the HM3 variant; SMAJ58CA-M3/5A remains suitable for industrial and consumer use where AEC-Q101 is not mandated.
What is the maximum clamping voltage of SMAJ58CA-M3/5A under surge conditions?
The maximum clamping voltage (VC) of SMAJ58CA-M3/5A is 93.6 V at its rated peak pulse current (IPPM) of 4.3 A, tested with a 10/1000 μs waveform. This value is guaranteed across temperature and lot variations per Vishay's datasheet (Doc. #88390, Rev. 09-Jan-2024). It defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs (e.g., 75 V-rated transceivers) remain within safe operating area.
Can SMAJ58CA-M3/5A be used in place of SMAJ58A-M3/5A?
SMAJ58CA-M3/5A can replace SMAJ58A-M3/5A only if the circuit is truly bidirectional or polarity-agnostic - for example, protecting an RS-485 bus or transformer-coupled Ethernet PHY. However, it cannot substitute in unidirectional applications requiring forward conduction (e.g., DC power rail clamping), because SMAJ58CA-M3/5A lacks specified forward voltage (VF) and is not characterized for sustained forward current. Always verify signal topology before interchanging SMAJ58CA-M3/5A and SMAJ58A-M3/5A.
What PCB layout guidance applies to SMAJ58CA-M3/5A for optimal thermal and electrical performance?
For optimal performance, mount SMAJ58CA-M3/5A on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's datasheet recommendation. This pad size ensures the specified 400 W pulse power rating and limits junction temperature rise. Avoid narrow traces between the TVS and protected node - keep them short and wide to minimize inductance. No thermal vias are required for single-pulse events, but for repetitive surges, consider adding thermal vias under pads to improve heat dissipation and sustain lower RθJA.
SMAJ58CA-M3/5A 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-M3/5A FAQ
1.How can I place an order for SMAJ58CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CA-M3/5A 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-M3/5A reliable?
The price and inventory of SMAJ58CA-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58CA-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ58CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CA-M3/5A?
SMAJ58CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CA-M3/5A 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-M3/5A?
For technical support, including SMAJ58CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CA-M3/5A requirements.
6.How does Aetrix verify that SMAJ58CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ58CA-M3/5A 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-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ58CA-M3/5A?
All SMAJ58CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CA-M3/5A, 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-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ58CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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