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Vishay General Semiconductor - Diodes Division SMAJ58AHM3_A/H
- Part No.:
- SMAJ58AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58AHM3_A/H.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ58AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal 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), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ58AHM3_A/H datasheet, SMAJ58AHM3_A/H pinout, SMAJ58AHM3_A/H application, or SMAJ58AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 150 °C max junction temperature, low incremental surge resistance, and suitability for inductive load switching and lightning-induced surge suppression in 12 V/24 V DC systems.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, optimized for fast response (<1 ns) to transient overvoltages while maintaining low leakage (<1 μA at 58 V). Its glass-passivated junction ensures stable breakdown characteristics and high reliability under repetitive surge stress.
The SMAJ58AHM3_A/H delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for rated power handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR min/max | 64.4 V / 71.2 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients. |
| VC @ IPPM | 93.6 V at 4.3 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum stress level. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak surge energy absorption capability; defines single-event robustness. |
| ID @ VWM | <1 μA - Reverse leakage at rated stand-off voltage; critical for low-power sensor and battery-backed circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount outline with 0.208" x 0.157" footprint; compatible with automated placement and reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C peak reflow), UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance per JESD22 standards. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial electronics without compromising surge performance. |
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients from inductive switching (e.g., solenoid drivers, relay coils) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on downstream components-critical for protecting 60 V-rated MOSFETs and logic ICs. |
| Fast response time (<1 ns) | Engages before sensitive circuitry experiences damaging overvoltage, preserving signal integrity in high-speed interfaces. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V power rails in body control modules against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between supply rail and chassis ground. Use Value: Limits transient voltage to ≤93.6 V, preventing damage to microcontrollers and CAN transceivers rated for 65 V absolute maximum. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) from ESD and field wiring surges. IC Role / Device Role / Timing Role: Standoff-mode protector on sensor transmitter output, referenced to system ground. Use Value: Maintains <1 μA leakage at 58 V, avoiding offset errors in precision current-loop conditioning circuits. |
| DC Motor Drive Gate Protection | Telecom Power Input Stage |
|
Use Scenario: Safeguarding high-side N-channel MOSFET gate drivers from Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: Clamp diode across gate-source terminals to limit VGS excursion during dV/dt events. Use Value: Fast sub-nanosecond response prevents false turn-on; 93.6 V clamping protects gate oxide rated for 20 V max. |
Use Scenario: Front-end surge suppression on 48 V telecom power inputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary unidirectional TVS on input bus prior to DC/DC converter stage. Use Value: 400 W rating handles IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges; AEC-Q101 qualification adds long-term field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58AHE3_A/H | Same electrical specs but RoHS-compliant commercial grade (E3), not halogen-free or AEC-Q101 qualified. | Lacks automotive qualification and halogen-free certification; suitable for non-automotive industrial use only. | Select SMAJ58AHE3_A/H where AEC-Q101 and halogen-free requirements are not mandated. |
| SMAJ58A-M3/61 | Identical electrical and thermal specs; differs only in packaging format (61 = 7" reel, 1800 pcs) and base P/N suffix. | No functional difference; same SMA package, same HM3 material specification (halogen-free + RoHS). | SMAJ58A-M3/61 is functionally identical to SMAJ58AHM3_A/H-only ordering code and reel size differ. |
Compared with SMAJ58AHE3_A/H, SMAJ58AHM3_A/H adds halogen-free construction and AEC-Q101 qualification for automotive deployment; compared with SMAJ58A-M3/61, it shares identical specifications but uses a different revision-coded packaging designation (A/H vs. /61), both supporting 7" tape-and-reel delivery.
Availability
SMAJ58AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, DC motor drive gate protection, and telecom power input stage applications requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ58AHM3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series was developed for robust, surface-mount transient suppression in harsh environments-including automotive, industrial, and telecom-balancing high surge capability, compact size, and qualification-grade consistency.
FAQ
What is the clamping voltage of SMAJ58AHM3_A/H at its rated peak pulse current?
The SMAJ58AHM3_A/H has a maximum clamping voltage (VC) of 93.6 V at its specified peak pulse current (IPPM) of 4.3 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during a surge event. The clamping performance is guaranteed across the full operating temperature range and is integral to ensuring downstream components remain within their absolute maximum ratings.
Is SMAJ58AHM3_A/H qualified for automotive applications?
Yes, SMAJ58AHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It meets stress tests including temperature cycling, high-temperature operating life, and surge endurance required for under-hood and chassis-mounted electronics. This qualification makes SMAJ58AHM3_A/H suitable for use in engine control units, body electronics, and ADAS power domains where reliability under thermal and electrical stress is mandatory.
What does the "A/H" suffix mean in SMAJ58AHM3_A/H?
The "A/H" suffix in SMAJ58AHM3_A/H denotes the revision code and packaging configuration: "A" indicates the first revision of the HM3-specification device, and "H" specifies the preferred package code for 7-inch diameter plastic tape-and-reel delivery (1800 units per reel). This coding aligns with Vishay's ordering nomenclature in Document Number 88390 and distinguishes it from alternate reel sizes (e.g., /5A for 13-inch reels) or material variants (e.g., HE3 for AEC-Q101 without halogen-free).
How does SMAJ58AHM3_A/H compare to bidirectional TVS diodes like SMAJ58CA?
SMAJ58AHM3_A/H is unidirectional and intended for DC line protection with defined polarity (cathode-banded), whereas SMAJ58CA is bidirectional and symmetrical-suitable for AC or floating signal lines. SMAJ58AHM3_A/H offers lower leakage (<1 μA at 58 V) and higher surge capability (400 W) than SMAJ58CA (300 W above 78 V), but cannot protect AC waveforms. Its unidirectional nature enables tighter clamping control in grounded DC systems, such as automotive 12 V supplies, where polarity is fixed and leakage sensitivity is critical.
What PCB layout guidance applies to SMAJ58AHM3_A/H for optimal surge performance?
For rated 400 W surge handling, SMAJ58AHM3_A/H requires minimum 5.0 mm × 5.0 mm copper pads per terminal (as specified in Vishay Doc. 88390), with short, low-inductance traces to ground. Thermal relief should be minimized to maintain RθJA ≤ 120 °C/W; use internal ground planes and multiple vias if layer stacking permits. Avoid routing sensitive signals near the TVS anode/cathode paths, and place SMAJ58AHM3_A/H as close as possible to the protected port-ideally within 5 mm-to reduce parasitic inductance that degrades clamping speed and effectiveness.
SMAJ58AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ58AHM3_A/H FAQ
1.How can I place an order for SMAJ58AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58AHM3_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 SMAJ58AHM3_A/H reliable?
The price and inventory of SMAJ58AHM3_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 SMAJ58AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ58AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58AHM3_A/H?
SMAJ58AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58AHM3_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 SMAJ58AHM3_A/H?
For technical support, including SMAJ58AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58AHM3_A/H requirements.
6.How does Aetrix verify that SMAJ58AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ58AHM3_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 SMAJ58AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ58AHM3_A/H?
All SMAJ58AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58AHM3_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 SMAJ58AHM3_A/H part is unused and in its original packaging.
Return procedure for SMAJ58AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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