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Vishay General Semiconductor - Diodes Division SMAJ58CAHM3_A/I
- Part No.:
- SMAJ58CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CAHM3_A/I.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,655
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Product details
Overview
SMAJ58CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 58 V standoff voltage (VWM), 64.4–71.2 V breakdown range (VBR at 1 mA), and clamps transients to ≤93.6 V at 4.3 A peak pulse current (IPPM) under 10/1000 μs waveform - used to safeguard MOSFETs, ICs, and sensor signal lines in automotive and industrial power rails.
For engineers reviewing the SMAJ58CAHM3_A/I datasheet, SMAJ58CAHM3_A/I pinout, SMAJ58CAHM3_A/I application, or SMAJ58CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 400 W peak pulse power rating (≤78 V), low thermal resistance (RθJL = 30 °C/W), and halogen-free RoHS-compliant construction per ordering code HM3.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient events exceeding VWM = 58 V, it avalanches symmetrically in both directions to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown behavior and fast response (<1 ps), while the SMA package supports automated SMT placement and meets MSL Level 1 (260 °C reflow).
Rated for -55 °C to +150 °C operating junction temperature, SMAJ58CAHM3_A/I delivers 400 W peak pulse power (10/1000 μs) up to 78 V, derating to 300 W above that threshold. It exhibits low incremental surge resistance and maximum reverse leakage of 1.0 μA at VWM, enabling reliable standby operation in low-power sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 58 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin for protected line. |
| VBR (Breakdown Voltage) | 64.4–71.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot. |
| VC (Clamping Voltage) | ≤93.6 V at IPPM = 4.3 A - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge. |
| PPPM (Peak Pulse Power) | 400 W (≤78 V) - Surge energy handling capacity; sufficient for ISO 7637-2 Pulse 1/2a/5a in 12 V automotive systems. |
| IFSM (Surge Current) | 40 A (8.3 ms half-sine) - Withstands repetitive load-dump surges without degradation when properly heatsinked. |
| TJmax | +150 °C - Enables use in under-hood automotive modules and industrial motor drives with high ambient temperatures. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with standard 0.2" × 0.2" copper pads. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated. Bidirectional configuration has no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve identical roles; bidirectional conduction enables protection on AC or floating DC lines without orientation concern. |
| Case / Body | Thermal interface | Plastic body provides electrical isolation; thermal path relies on PCB copper pads (0.2" × 0.2" per terminal recommended for 400 W rating). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and infotainment systems. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations without compromising surge performance or thermal stability. |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients common in 12 V/24 V vehicle electrical systems and industrial PLC I/O modules. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during clamping - critical for protecting 60 V-rated MOSFETs and microcontrollers with tight VDD margins. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns - reduces manufacturing risk and cost. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed upstream of DC-DC converters and LDOs. Use Value: Clamps surges to ≤93.6 V, preventing damage to 60 V input-rated regulators and ensuring system-level EMC compliance. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loops) and digital sensor interfaces (CAN, LIN) from ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential or single-ended signal traces near connector entry points. Use Value: Sub-1 ns response time and <1 μA leakage at 58 V preserve signal integrity and minimize offset error in precision measurement circuits. |
| Telecom Equipment DC Input Stage | Consumer Power Adapter Secondary Side |
|
Use Scenario: Secondary-side overvoltage suppression in PoE-powered switches and base station power supplies exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Final-stage TVS on 48 V or 57 V DC input rails before primary controller ICs. Use Value: 400 W rating and 150 °C TJmax support sustained operation in enclosed telecom enclosures with elevated ambient temperatures. |
Use Scenario: Output rail protection in USB-C PD adapters and wireless charging transmitters subject to output short-circuit and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on regulated 5–20 V output lines. Use Value: Symmetrical clamping avoids polarity dependency during reversible cable insertion, and 58 V VWM accommodates 20 V PD 3.1 extended power range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58CAHE3_A/I | Same electrical specs and package, but RoHS-compliant commercial grade (not halogen-free); lacks AEC-Q101 qualification. | Approved for non-automotive industrial and consumer designs where halogen-free mandate or automotive qualification is not required. | Select when cost sensitivity outweighs halogen-free or automotive qualification requirements. |
| SMBJ58CAHM3_A/I | Identical VWM, VBR, and VC, but SMB (DO-214AA) package - 20 % larger footprint and higher RθJA (100 °C/W vs. 120 °C/W). | Better thermal dissipation margin for high-duty-cycle surge environments; requires larger PCB area. | Choose when board space permits and enhanced thermal robustness is prioritized over miniaturization. |
Compared with SMAJ58CAHM3_A/I, SMAJ58CAHE3_A/I offers identical protection performance without halogen-free or AEC-Q101 assurance, while SMBJ58CAHM3_A/I trades compact size for improved thermal handling via a larger package - enabling longer surge endurance in thermally constrained layouts.
Availability
SMAJ58CAHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power supply designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMAJ58CAHM3_A/I 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMAJ58CAHM3_A/I at its rated peak pulse current?
The SMAJ58CAHM3_A/I clamps to a maximum of 93.6 V at its specified peak pulse current of 4.3 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and reflects the worst-case voltage imposed on protected circuitry during surge events - a critical parameter for verifying compatibility with downstream IC voltage ratings.
Is SMAJ58CAHM3_A/I suitable for automotive applications?
Yes, SMAJ58CAHM3_A/I is AEC-Q101 qualified and specifically intended for automotive use. Its halogen-free, RoHS-compliant HM3 construction, 150 °C maximum junction temperature, and validated performance across temperature cycling and surge stress make it appropriate for engine control units, body electronics, and ADAS power domains.
How does the bidirectional design of SMAJ58CAHM3_A/I affect its PCB layout?
The bidirectional design of SMAJ58CAHM3_A/I eliminates polarity constraints: no cathode band marking exists, and either terminal may connect to either side of the protected line. This simplifies layout, reduces assembly errors, and enables use on AC-coupled or floating DC nodes - such as CAN bus lines or transformer-isolated power rails - without orientation verification.
What is the thermal resistance from junction to lead (RθJL) for SMAJ58CAHM3_A/I?
The SMAJ58CAHM3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W, measured under standard mounting conditions. This low value enables efficient heat transfer from the silicon die to the PCB copper pads, supporting reliable operation during repetitive surge events - especially important in automotive and industrial applications with limited airflow.
Does SMAJ58CAHM3_A/I meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMAJ58CAHM3_A/I meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows for standard lead-free soldering processes without preconditioning or dry-pack requirements - reducing manufacturing complexity and cost while maintaining reliability in high-volume SMT assembly.
SMAJ58CAHM3_A/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ58CAHM3_A/I FAQ
1.How can I place an order for SMAJ58CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CAHM3_A/I 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 SMAJ58CAHM3_A/I reliable?
The price and inventory of SMAJ58CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ58CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CAHM3_A/I?
SMAJ58CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CAHM3_A/I 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 SMAJ58CAHM3_A/I?
For technical support, including SMAJ58CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CAHM3_A/I requirements.
6.How does Aetrix verify that SMAJ58CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ58CAHM3_A/I 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 SMAJ58CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ58CAHM3_A/I?
All SMAJ58CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CAHM3_A/I, 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 SMAJ58CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ58CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ58CAHM3_A/I Tags
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