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Vishay General Semiconductor - Diodes Division SMAJ58CAHM3P_A/H
- Part No.:
- SMAJ58CAHM3P_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CAHM3P_A/H.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ58CAHM3P_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 and power lines. It features a 58 V stand-off 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). It is used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supply interfaces.
For engineers reviewing the SMAJ58CAHM3P_A/H datasheet, SMAJ58CAHM3P_A/H pinout, SMAJ58CAHM3P_A/H application, or SMAJ58CAHM3P_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (via HM3 suffix), halogen-free RoHS compliance, and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 μA at 58 V), while the low incremental surge resistance supports fast energy absorption during ESD or lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and exhibits a thermal resistance of 120 °C/W (junction-to-ambient) on standard PCB pads. Its MSL Level 1 rating (per J-STD-020) and 260 °C lead-free reflow compatibility confirm suitability for high-volume automated manufacturing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V nominal systems. |
| VBR min/max | 64.4 V / 71.2 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on under transient stress without premature conduction. |
| VC @ IPPM | 93.6 V at 4.3 A - Clamped voltage seen by protected circuit during 10/1000 μs surge; limits downstream stress to <94 V. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak pulse power handling per 10/1000 μs waveform; determines survivability against IEC 61000-4-5 surges. |
| ID @ VWM | <1 μA - Reverse leakage at stand-off voltage; ensures negligible standby power loss and no signal distortion in high-impedance lines. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial ambient environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.54 mm lead pitch; compatible with IPC-7351B footprint and pick-and-place tooling. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current from either direction during overvoltage events. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or return rail during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity constraints. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock-required for engine control and ADAS modules. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS709E; eliminates brominated flame retardants for safer end-of-life processing. |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 3 (1 kV line-earth, 2 kV line-line) surges when mounted on 5 mm × 5 mm copper pads. |
| MSL Level 1, 260 °C peak reflow | Supports lead-free assembly without moisture-induced popcorning; eliminates pre-bake requirement in high-throughput SMT lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs from load-dump transients and alternator ripple in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and chassis ground to clamp spikes up to ±120 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤93.6 V, preventing latch-up or gate oxide damage in 65 nm logic. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in PLC I/O modules from EFT and surge coupling. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) TVS shunting transient energy away from ADC input pins. Use Value: Maintains signal integrity below 1 MHz bandwidth while suppressing 4 kV contact ESD per IEC 61000-4-2 without distorting mV-level sensor outputs. |
| Telecom DC Power Interface | Consumer USB-C Power Delivery Path |
|
Use Scenario: Safeguarding PoE-powered switches and base stations against induced lightning surges on 57 V DC input lines. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC front-end, coordinated with MOVs for multi-stage protection. Use Value: Absorbs 400 W surge energy within 1 μs response time, reducing let-through voltage to levels compatible with 100 V-rated input capacitors. |
Use Scenario: Protecting USB-C CC and VBUS lines in portable chargers and docks from hot-plug transients and reverse-voltage faults. IC Role / Device Role / Timing Role: Bidirectional TVS placed across VBUS and GND to suppress ±20 V overshoot during plug insertion/removal. Use Value: Prevents damage to USB PD controllers (e.g., FUSB302) by limiting VBUS excursions to ≤93.6 V during 100 ns rise-time events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58CAHE3_A/H | Same electrical specs, but RoHS-compliant (non-halogen-free) and commercial-grade only-lacks AEC-Q101 qualification. | Approved for consumer/industrial use only; not certified for automotive under-hood deployment. | Select when AEC-Q101 is unnecessary and cost sensitivity favors non-halogen-free variant. |
| SMBJ58CAHM3 | Higher 600 W PPPM rating, SMB (DO-214AA) package-larger footprint (4.57 mm × 3.94 mm) and 150 °C TJ max. | Used where higher surge margin is required (e.g., outdoor telecom), but requires PCB layout change. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits larger package. |
Compared with SMAJ58CAHE3_A/H, the SMAJ58CAHM3P_A/H adds halogen-free compliance and AEC-Q101 validation for automotive use; compared with SMBJ58CAHM3, it trades 200 W pulse power for smaller SMA footprint and identical thermal performance on matched pad layouts.
Availability
SMAJ58CAHM3P_A/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom DC power protection requiring stable component supply across extended production lifecycles.
Supply support for SMAJ58CAHM3P_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, and protection devices with emphasis on reliability and automotive qualification.
The SMAJ series was engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMAJ58CAHM3P_A/H at its rated peak pulse current?
The SMAJ58CAHM3P_A/H has a maximum clamping voltage (VC) of 93.6 V at its rated peak pulse current (IPPM) of 4.3 A under a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected circuits will not experience voltages exceeding 93.6 V during standardized surge events. The clamping performance is validated across the full operating temperature range of −55 °C to +150 °C, and the SMAJ58CAHM3P_A/H maintains this specification in bidirectional mode.
Is SMAJ58CAHM3P_A/H qualified for automotive applications?
Yes, SMAJ58CAHM3P_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code, which denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It undergoes stress testing including temperature cycling, high-temperature operating life, and mechanical shock per AEC-Q101 Rev D. This makes SMAJ58CAHM3P_A/H suitable for under-hood engine control units, ADAS camera modules, and body electronics where automotive-grade reliability is mandated.
What is the thermal resistance of SMAJ58CAHM3P_A/H, and how does it affect PCB layout?
The SMAJ58CAHM3P_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with 1 oz copper. To maintain junction temperature below 150 °C during repetitive surges, designers must ensure adequate copper area and avoid excessive trace length. The SMAJ58CAHM3P_A/H's RθJL of 30 °C/W further indicates efficient heat transfer to PCB leads, supporting thermal performance in compact layouts.
Does SMAJ58CAHM3P_A/H have polarity markings, and how is it installed on PCB?
No, SMAJ58CAHM3P_A/H does not have polarity markings because it is a bidirectional TVS diode-the internal structure is symmetrical, and both terminals function identically regardless of voltage polarity. Installation requires no orientation check; the device can be placed in either direction across the protected line and ground. This simplifies automated placement and eliminates risk of reverse installation errors common with unidirectional variants like SMAJ58A.
What is the maximum reverse leakage current of SMAJ58CAHM3P_A/H at its stand-off voltage?
The SMAJ58CAHM3P_A/H exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 58 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal power loss in always-on systems and prevents signal degradation in high-impedance sensor interfaces. Leakage remains below 5 μA up to 125 °C, preserving performance in under-hood automotive environments where the SMAJ58CAHM3P_A/H is commonly deployed.
SMAJ58CAHM3P_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:
- 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)
SMAJ58CAHM3P_A/H FAQ
1.How can I place an order for SMAJ58CAHM3P_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CAHM3P_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 SMAJ58CAHM3P_A/H reliable?
The price and inventory of SMAJ58CAHM3P_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 SMAJ58CAHM3P_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ58CAHM3P_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CAHM3P_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CAHM3P_A/H?
SMAJ58CAHM3P_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CAHM3P_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 SMAJ58CAHM3P_A/H?
For technical support, including SMAJ58CAHM3P_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CAHM3P_A/H requirements.
6.How does Aetrix verify that SMAJ58CAHM3P_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ58CAHM3P_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 SMAJ58CAHM3P_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ58CAHM3P_A/H?
All SMAJ58CAHM3P_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CAHM3P_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 SMAJ58CAHM3P_A/H part is unused and in its original packaging.
Return procedure for SMAJ58CAHM3P_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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