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Vishay General Semiconductor - Diodes Division SMAJ58CAHE3_A/H
- Part No.:
- SMAJ58CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CAHE3_A/H.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,785
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Product details
Overview
SMAJ58CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or 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 (IPPM), and 400 W peak pulse power (10/1000 μs waveform), commonly deployed in automotive sensor interface protection.
For engineers reviewing the SMAJ58CAHE3_A/H datasheet, SMAJ58CAHE3_A/H pinout, SMAJ58CAHE3_A/H application, or SMAJ58CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly on PCBs requiring robust ESD and lightning surge immunity.
Technical Context
This device operates as a voltage-clamping protector: when reverse (or either polarity for bidirectional mode) transient voltage exceeds VBR, it avalanches to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMA package provides thermal resistance of 120 °C/W (junction-to-ambient) and supports 3.3 W steady-state power dissipation.
The SMAJ58CAHE3_A/H is rated for non-repetitive 10/1000 μs surges up to 400 W below 78 V (derated to 300 W above), with 40 A IFSM surge rating and ≤0.91 μA ID leakage at 58 V. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive underhood and body electronics applications.
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 - Confirmed avalanche onset range ensuring reliable turn-on margin |
| VC @ IPPM | 93.6 V at 4.3 A - Clamped voltage during 10/1000 μs surge, defining worst-case stress on downstream ICs |
| PPPM | 400 W (10/1000 μs) - Peak transient energy absorption capacity without failure |
| ID @ VWM | ≤0.91 μA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - Enables operation in high-temperature automotive environments (e.g., engine control units) |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional terminal pair | No polarity marking; identical clamping behavior in both directions - simplifies layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients from load dump or ISO 7637-2 Pulse 5a without degradation |
| AEC-Q101 qualification | Validated for automotive-grade reliability including 1000-cycle temperature cycling and 1000-hr HTRB |
| Glass passivated chip junction | Ensures stable VBR over lifetime and improved moisture resistance vs. epoxy-passivated alternatives |
| Low profile SMA package | 0.208" × 0.157" footprint enables compact placement near connectors or IC inputs without sacrificing thermal performance |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control modules from inductive switching spikes and alternator load dump. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply and ground, limiting transients to <94 V during 10/1000 μs events. Use Value: Prevents latch-up or permanent damage to 5 V or 12 V rail-connected op-amps and ADCs while maintaining <1 μA leakage at 58 V standby. |
Use Scenario: Safeguarding CANH/CANL differential pair against ESD (IEC 61000-4-2 ±15 kV) and burst noise in factory automation gateways. IC Role / Device Role / Timing Role: Paired SMAJ58CAHE3_A/H devices (one per line) provide symmetrical clamping with matched VC and low capacitance. Use Value: Maintains CAN signal integrity with <10 pF junction capacitance (typ.) and clamps ESD to <94 V within <1 ns - preserving bit timing and error-free communication. |
| Telecom Power Input Protection | Consumer USB-C Port Surge Suppression |
|
Use Scenario: Shielding 48 V DC input rails of PoE-powered network switches from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary TVS stage upstream of DC-DC converter, absorbing up to 400 W transient energy before secondary protection engages. Use Value: Withstands repetitive 10/1000 μs surges at 0.01% duty cycle and derates predictably above 25 °C - enabling thermal design with 5.0 mm × 5.0 mm copper pads. |
Use Scenario: Adding robust surge immunity to USB-C receptacles in portable monitors handling 20 V PD input. IC Role / Device Role / Timing Role: Bidirectional clamp between VBUS and GND, activated only during overvoltage events exceeding 58 V. Use Value: Delivers AEC-Q101-grade reliability in consumer form factors, with 0.064 g unit weight and compatibility with 7" tape-and-reel SMT placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58CA-M3 | Halogen-free, RoHS-compliant, same electrical specs and AEC-Q101 qualification; differs only in material composition (HM3 vs HE3) | Identical use cases; selected where halogen-free compliance is mandated by OEM sustainability requirements | Drop-in substitute if halogen-free bill-of-materials is required; same footprint, thermal, and clamping performance |
| SMBJ58CAHE3_A/H | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; 600 W PPPM rating and lower RθJA (90 °C/W) | Better suited for higher-power or thermally constrained designs where 400 W is insufficient or board space allows larger footprint | Choose when higher surge margin or improved thermal dissipation is needed; requires PCB pad revision |
Compared with SMAJ58CAHE3_A/H, SMAJ58CA-M3 offers identical protection performance with halogen-free construction, while SMBJ58CAHE3_A/H delivers 50 % higher peak power and better thermal management at the cost of increased board area - enabling trade-offs between density and ruggedness.
Availability
SMAJ58CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom power inputs, and consumer USB-C port protection requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ58CAHE3_A/H 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, efficiency, and application-specific validation.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ESD, lightning, and load dump is mission-critical.
FAQ
What is the clamping voltage of SMAJ58CAHE3_A/H at its rated peak pulse current?
The SMAJ58CAHE3_A/H has a maximum clamping voltage (VC) of 93.6 V at 4.3 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Vishay datasheet Document Number 88390, page 2. The SMAJ58CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMAJ58CAHE3_A/H qualified for automotive applications?
Yes, SMAJ58CAHE3_A/H is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD - validating its suitability for automotive underhood and body electronics. The datasheet explicitly states AEC-Q101 qualification in the Mechanical Data section and notes it applies to base P/NHE3_X variants like SMAJ58CAHE3_A/H.
What is the standoff voltage and leakage current specification for SMAJ58CAHE3_A/H?
The SMAJ58CAHE3_A/H has a reverse standoff voltage (VWM) of 58 V and a maximum reverse leakage current (ID) of 0.91 μA at that voltage and 25 °C, per the Electrical Characteristics table on page 2 of the Vishay datasheet. This ultra-low leakage ensures minimal power loss in battery-backed or always-on systems and preserves signal fidelity in high-impedance sensor interfaces.
Does SMAJ58CAHE3_A/H have polarity markings, and how is it mounted?
No, SMAJ58CAHE3_A/H is a bidirectional TVS diode and carries no polarity marking - its terminals are functionally symmetrical. It is mounted in the SMA (DO-214AC) package using standard SMT reflow with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. The device meets MSL Level 1, allowing unlimited floor life and standard 260 °C peak reflow without preconditioning.
What is the thermal resistance and power dissipation capability of SMAJ58CAHE3_A/H?
The SMAJ58CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and a steady-state power dissipation (PD) rating of 3.3 W at 50 °C ambient on an infinite heatsink. When mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads, it sustains its 400 W peak pulse rating. These values are specified in the Thermal Characteristics and Maximum Ratings sections of the Vishay datasheet.
SMAJ58CAHE3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ58CAHE3_A/H FAQ
1.How can I place an order for SMAJ58CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CAHE3_A/H 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 SMAJ58CAHE3_A/H reliable?
The price and inventory of SMAJ58CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ58CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CAHE3_A/H?
SMAJ58CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CAHE3_A/H 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 SMAJ58CAHE3_A/H?
For technical support, including SMAJ58CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ58CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ58CAHE3_A/H 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 SMAJ58CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ58CAHE3_A/H?
All SMAJ58CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CAHE3_A/H, 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 SMAJ58CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ58CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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