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Vishay General Semiconductor - Diodes Division SMAJ58CAHM3P/I
- Part No.:
- SMAJ58CAHM3P/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58CAHM3P/I.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,557
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Product details
Overview
SMAJ58CAHM3P/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 58 V standoff voltage (VWM), 64.4–71.2 V breakdown range (VBR), 93.6 V maximum clamping voltage (VC) at 4.3 A peak pulse current, and 400 W peak pulse power rating (10/1000 μs waveform). It is used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems against ESD, lightning surges, and inductive switching transients.
For engineers reviewing the SMAJ58CAHM3P/I datasheet, SMAJ58CAHM3P/I pinout, SMAJ58CAHM3P/I application, or SMAJ58CAHM3P/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMA (DO-214AC) surface-mount package compatibility, and verified 93.6 V clamping performance under 4.3 A surge conditions.
Technical Context
This device operates as a voltage-clamped shunt protector: when reverse (or either polarity, in bidirectional mode) voltage exceeds VBR, it avalanches into low-impedance conduction, limiting downstream voltage to ≤93.6 V. Its glass-passivated junction ensures stable breakdown and fast response (<1 ps), while its low incremental surge resistance minimizes voltage overshoot during transient events.
The SMAJ58CAHM3P/I is rated for 40 A non-repetitive forward surge (IFSM), supports continuous power dissipation of 3.3 W at 50 °C, and maintains operation across –55 °C to +150 °C junction temperature. Its MSL Level 1 rating (JEDEC J-STD-020) and matte tin-plated leads ensure compatibility with standard reflow processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum steady-state reverse 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 avalanche onset range; ensures reliable triggering above system operating voltage. |
| VC @ IPPM | 93.6 V at 4.3 A - Measured clamping voltage under 10/1000 μs surge; limits stress on protected ICs to safe levels. |
| PPPM | 400 W - Peak pulse power handling per 10/1000 μs waveform; sufficient for ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5 Level 3. |
| IPPM | 4.3 A - Peak surge current corresponding to VC; enables precise coordination with upstream fuses or current-limiting circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive and high-ambient industrial deployments. |
| Package | SMA (DO-214AC) - Standardized 2-pin SMD outline; 0.208" × 0.157" footprint with 0.100" lead pitch; compatible with automated placement. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetric; both leads serve as interchangeable surge-current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (negative polarity event) | Conducts during negative transients; forms symmetrical clamping path with cathode. |
| Cathode | Surge current entry (positive polarity event) | Conducts during positive transients; identical electrical role to anode in bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC specification. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms halogen-free molding compound and full RoHS compliance - meets automotive OEM material declarations. |
| 400 W peak pulse power | Rated per 10/1000 μs waveform; delivers robust protection against common board-level surges without derating below 78 V. |
| Low clamping ratio (VC/VWM = 1.61) | 93.6 V / 58 V ratio ensures minimal overvoltage margin - critical for safeguarding 60 V-tolerant interface ICs. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs and body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Shunt TVS placed directly at connector entry point to clamp surges before reaching DC-DC converters and microcontrollers. Use Value: Withstands 400 W pulses and operates up to +150 °C, enabling direct integration into under-hood power distribution units. |
Use Scenario: Safeguarding analog outputs and digital communication lines (e.g., CAN FD, LIN) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential signal pairs to suppress ESD and coupled noise without distorting signal integrity. Use Value: 93.6 V clamping voltage prevents latch-up in 3.3 V/5 V sensor ASICs while maintaining <1 pF junction capacitance at low bias. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Guarding AC-DC adapter inputs and PoE-powered equipment front-ends against lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-level TVS in series with MOVs or GDTs to provide fast-response secondary clamping after coarse suppression. Use Value: Fast avalanche response (<1 ps) complements slower primary protectors, reducing let-through energy by >30% versus standalone solutions. |
Use Scenario: Shielding gate drivers and MCU I/O from inductive kickback generated by BLDC motor commutation in smart home appliances. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to motor driver ICs to absorb sub-microsecond turn-off spikes. Use Value: 4.3 A peak pulse current rating aligns with typical MOSFET gate charge recovery currents, preventing false triggering during normal switching. |
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 AEC-Q101 qualification, but uses RoHS-compliant (non-halogen-free) molding compound. | Acceptable for commercial/industrial use where halogen-free requirement is not mandated. | Select when cost optimization is prioritized and halogen-free compliance is not required by end-customer spec. |
| SMBJ58CAHM3 | Higher 600 W PPPM, same VWM/VC, but larger SMB (DO-214AA) package (0.260" × 0.175"). | Better suited for higher-energy surges; requires PCB layout change due to larger footprint and thermal pad area. | Choose when system-level surge testing exceeds 400 W or when improved thermal dissipation is needed in high-power designs. |
Compared with SMAJ58CAHE3_A/I, the SMAJ58CAHM3P/I adds halogen-free compliance without sacrificing AEC-Q101 qualification or clamping performance; versus SMBJ58CAHM3, it trades 200 W pulse headroom for space-constrained SMA footprint and identical mounting process compatibility.
Availability
SMAJ58CAHM3P/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-qualified surge protection.
Supply support for SMAJ58CAHM3P/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMAJ series was developed specifically for surface-mount transient suppression in space-constrained, high-reliability environments - especially automotive and industrial systems demanding AEC-Q101 qualification and repeatable clamping behavior.
FAQ
What is the clamping voltage of the SMAJ58CAHM3P/I under a 10/1000 μs surge?
The SMAJ58CAHM3P/I has a maximum clamping voltage (VC) of 93.6 V when subjected to its rated peak pulse current of 4.3 A using the standardized 10/1000 μs waveform. This value is measured and guaranteed per Vishay's datasheet (Document Number 88390, Rev. 09-Jan-2024), ensuring predictable overvoltage limiting for downstream circuitry. The SMAJ58CAHM3P/I maintains this clamping performance across its full operating temperature range.
Is the SMAJ58CAHM3P/I suitable for automotive applications?
Yes - the SMAJ58CAHM3P/I is explicitly AEC-Q101 qualified, as confirmed by its HM3 suffix and Vishay's ordering documentation. It undergoes rigorous stress testing for temperature cycling, mechanical shock, and humidity bias, making it suitable for under-hood and chassis-mounted automotive electronics. The SMAJ58CAHM3P/I is commonly deployed in body control modules, ADAS power supplies, and infotainment system interfaces where bidirectional surge immunity is required.
Does the SMAJ58CAHM3P/I have polarity markings on the package?
No - the SMAJ58CAHM3P/I is a bidirectional TVS diode and carries no polarity marking on the SMA (DO-214AC) package. Unlike unidirectional variants (e.g., SMAJ58A), which feature a cathode band, the SMAJ58CAHM3P/I functions identically in both directions and may be mounted without orientation constraints. This simplifies automated placement and eliminates risk of reverse installation in symmetric protection circuits.
What is the thermal resistance of the SMAJ58CAHM3P/I?
The SMAJ58CAHM3P/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended copper pad layout (0.2" × 0.2" per terminal), and a junction-to-lead resistance (RθJL) of 30 °C/W. These values are specified in the Thermal Characteristics table of the Vishay datasheet and inform thermal design for sustained power dissipation - particularly important when operating near its 3.3 W steady-state limit in enclosed industrial enclosures.
How does the SMAJ58CAHM3P/I compare to the SMAJ58A variant?
The SMAJ58CAHM3P/I is bidirectional with symmetrical clamping in both polarities, while the SMAJ58A is unidirectional and conducts only in reverse bias (cathode-positive). The SMAJ58CAHM3P/I lacks a cathode band marking and supports applications like AC line protection or differential signal clamping where polarity reversal occurs. Both share identical VWM, VBR, VC, and PPPM ratings, but the SMAJ58CAHM3P/I's bidirectional nature makes it unsuitable as a direct replacement for unidirectional rectification or DC-biased protection without circuit review.
SMAJ58CAHM3P/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:
- 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/I FAQ
1.How can I place an order for SMAJ58CAHM3P/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58CAHM3P/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 SMAJ58CAHM3P/I reliable?
The price and inventory of SMAJ58CAHM3P/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58CAHM3P/I is usually 5 days.
3.What payment methods are accepted for SMAJ58CAHM3P/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58CAHM3P/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58CAHM3P/I?
SMAJ58CAHM3P/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58CAHM3P/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 SMAJ58CAHM3P/I?
For technical support, including SMAJ58CAHM3P/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58CAHM3P/I requirements.
6.How does Aetrix verify that SMAJ58CAHM3P/I is sourced from the original manufacturer or authorized distributors?
All SMAJ58CAHM3P/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 SMAJ58CAHM3P/I meets industry standards.
7.What is the process for return or replacement of SMAJ58CAHM3P/I?
All SMAJ58CAHM3P/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58CAHM3P/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 SMAJ58CAHM3P/I part is unused and in its original packaging.
Return procedure for SMAJ58CAHM3P/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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