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Vishay General Semiconductor - Diodes Division SMAJ58CAHM3P/H
- Part No.:
- SMAJ58CAHM3P/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CAHM3P/H.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ58CAHM3P/H 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 voltage (VBR) at 1 mA, 93.6 V maximum clamping voltage (VC) at 4.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed across power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ58CAHM3P/H datasheet, SMAJ58CAHM3P/H pinout, SMAJ58CAHM3P/H application, or SMAJ58CAHM3P/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 58 V), but triggers into low-impedance conduction when transients exceed VBR, limiting downstream voltage to ≤93.6 V. Its glass-passivated junction ensures stable avalanche characteristics and fast response (<1 ns).
Rated for repetitive 0.01% duty cycle surges, it delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting reliable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 64.4 V / 71.2 V at 1 mA - Confirmed breakdown range ensuring consistent turn-on across production lots and temperature. |
| VC @ IPPM | 93.6 V at 4.3 A - Clamping voltage during 10/1000 μs surge; determines maximum stress imposed on protected ICs. |
| PPPM | 400 W - Peak pulse power handling capability with standard 10/1000 μs waveform; validates protection against IEC 61000-4-5 Level 3/4 surges. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports unidirectional surge tolerance where applicable. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration - no polarity marking; symmetrical terminals enable identical performance in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of the back-to-back avalanche junction; conducts surge current regardless of polarity. |
| Cathode | Transient current entry (bidirectional) | Second terminal of the back-to-back junction; completes low-impedance path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-201 Class 2 whisker resistance and UL 94 V-0 flammability - supports green manufacturing and end-of-life compliance. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (e.g., 2 Ω source impedance, 1 kV open-circuit) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V/5 V logic and CAN/LIN transceivers. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH; eliminates bake requirements prior to reflow soldering. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-supplied microcontrollers and CAN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS diode placed between VBAT and GND, triggered within <1 ns to clamp transients to ≤93.6 V. Use Value: Prevents latch-up or permanent damage to automotive-grade MCUs rated for 60 V absolute maximum, extending field reliability beyond ISO 7637-2 Pulse 5a. |
Use Scenario: Safeguarding analog outputs (4–20 mA) and digital I/O (RS-485, LIN) in factory automation sensors exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential signal pairs or single-ended lines referenced to local ground. Use Value: Maintains signal integrity by limiting induced transients to <94 V while adding <0.5 pF capacitance - negligible impact on 1 Mbps RS-485 rise time. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeding Protection |
|
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters after rectification, guarding against transformer flyback spikes and capacitor discharge surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor output, activated only during abnormal overvoltage events. Use Value: Enables compact design with no series impedance needed; withstands repeated 400 W pulses without parameter drift per JEDEC JESD22-A114. |
Use Scenario: Protecting PoE (Power over Ethernet) powered devices (PDs) from DC feed line surges caused by lightning-induced ground potential differences. IC Role / Device Role / Timing Role: Bidirectional clamp installed between PSE-provided DC pair and PD input stage, symmetrically suppressing ±100 V transients. Use Value: Complies with IEEE 802.3af/bt surge immunity requirements while maintaining <1 μA leakage at nominal 48 V supply. |
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/H | Same electrical specs and AEC-Q101 qualification, but RoHS-compliant without halogen-free molding compound. | Preferred for non-automotive industrial designs where halogen content is unrestricted but automotive traceability is required. | Select when halogen-free certification is not mandated but AEC-Q101 validation and lead-free finish are essential. |
| SMBJ58CAHM3 | Higher 600 W peak pulse power rating, same VWM/VC, larger SMB (DO-214AA) package (5.3 mm × 4.1 mm). | Used where higher surge margin is needed and PCB space allows larger footprint; not drop-in compatible due to different pad layout. | Choose when system-level surge testing exceeds 400 W requirements and board real estate permits SMB package. |
Compared with SMAJ58CAHM3P/H, SMAJ58CAHE3_A/H offers identical protection performance with standard RoHS compliance, while SMBJ58CAHM3 provides greater surge headroom at the cost of larger board area and non-interchangeable mounting.
Availability
SMAJ58CAHM3P/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom power feeding circuits requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMAJ58CAHM3P/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMAJ series is engineered specifically for board-level transient suppression in harsh environments - emphasizing AEC-Q101 qualification, tight parametric distribution, and robust surge endurance in compact surface-mount packages.
FAQ
What is the clamping voltage of SMAJ58CAHM3P/H at its rated peak pulse current?
The SMAJ58CAHM3P/H has a maximum clamping voltage (VC) of 93.6 V at its specified peak pulse current (IPPM) of 4.3 A, measured using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and confirms the device's ability to limit transient energy delivered to downstream circuitry - a critical parameter for validating protection margins in 12 V and 24 V automotive systems where SMAJ58CAHM3P/H is commonly deployed.
Is SMAJ58CAHM3P/H suitable for automotive applications?
Yes, SMAJ58CAHM3P/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - meeting stringent automotive reliability requirements for temperature cycling, humidity, and surge endurance. Its bidirectional architecture, 150 °C maximum junction temperature, and MSL Level 1 rating make SMAJ58CAHM3P/H appropriate for under-hood and chassis-mounted modules including body control units, lighting drivers, and sensor interface boards.
How does the bidirectional configuration of SMAJ58CAHM3P/H affect its circuit implementation?
The bidirectional configuration of SMAJ58CAHM3P/H means it functions identically in both polarities - no cathode band marking is present, and it clamps symmetrically above ±58 V. This eliminates polarity concerns during placement and simplifies layout for AC-coupled or floating signal lines such as CAN bus, RS-485, or transformer-isolated power supplies. Unlike unidirectional variants, SMAJ58CAHM3P/H requires no reference to system ground polarity, reducing design risk in differential or dual-rail systems.
What is the thermal resistance of SMAJ58CAHM3P/H, and how does it impact PCB layout?
SMAJ58CAHM3P/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surge conditions, designers must allocate adequate copper area and avoid thermal bottlenecks - especially important in high-density automotive PCBs where SMAJ58CAHM3P/H may experience ambient temperatures exceeding 105 °C.
Does SMAJ58CAHM3P/H require special handling or baking before reflow soldering?
No - SMAJ58CAHM3P/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at standard conditions (≤30 °C / 60% RH) and requires no pre-reflow baking. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102 for solderability, and the package withstands peak reflow temperatures up to 260 °C. This simplifies manufacturing logistics and reduces process risk in high-volume SMT lines deploying SMAJ58CAHM3P/H across automotive and industrial platforms.
SMAJ58CAHM3P/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for SMAJ58CAHM3P/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CAHM3P/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/H reliable?
The price and inventory of SMAJ58CAHM3P/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/H is usually 5 days.
3.What payment methods are accepted for SMAJ58CAHM3P/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CAHM3P/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CAHM3P/H?
SMAJ58CAHM3P/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CAHM3P/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/H?
For technical support, including SMAJ58CAHM3P/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CAHM3P/H requirements.
6.How does Aetrix verify that SMAJ58CAHM3P/H is sourced from the original manufacturer or authorized distributors?
All SMAJ58CAHM3P/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/H meets industry standards.
7.What is the process for return or replacement of SMAJ58CAHM3P/H?
All SMAJ58CAHM3P/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CAHM3P/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/H part is unused and in its original packaging.
Return procedure for SMAJ58CAHM3P/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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