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Vishay General Semiconductor - Diodes Division SMAJ58AHM3/I
- Part No.:
- SMAJ58AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58AHM3/I.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,507
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Product details
Overview
SMAJ58AHM3/I from Vishay General Semiconductor is a unidirectional 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, and clamps transients to ≤93.6 V at 4.3 A peak pulse current (IPPM) under 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ58AHM3/I datasheet, SMAJ58AHM3/I pinout, SMAJ58AHM3/I application, or SMAJ58AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, 400 W peak pulse power rating (≤78 V), low 0.057 %/°C VBR temperature coefficient, and halogen-free RoHS-compliant construction with matte tin-plated leads.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds VBR to divert surge energy away from downstream components. Its glass-passivated junction ensures stable leakage (<1.0 μA at 58 V) and fast response time (<1.0 ns), critical for suppressing ESD and inductive switching transients.
The SMAJ58AHM3/I is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports operating junction temperatures from –55 °C to +150 °C, and exhibits 120 °C/W junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads - enabling reliable operation in thermally constrained PCB layouts.
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 - precise breakdown threshold ensuring predictable turn-on behavior |
| VC @ IPPM | ≤93.6 V at 4.3 A - clamping voltage limits stress on protected ICs during 10/1000 μs surges |
| PPPM | 400 W - peak pulse power handling capability for transient suppression per JEDEC standard |
| IFSM | 40 A - surge current withstand for 8.3 ms half-sine wave, supporting inrush and fault conditions |
| TJ max. | +150 °C - extended junction temperature range suitable for under-hood automotive environments |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail or CAN_H); band marks this end for orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with environmental standards and JESD201 Class 2 whisker resistance |
| 400 W peak pulse power | Handles high-energy transients without degradation when mounted on 5 mm × 5 mm copper pads |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure to downstream components during surge events |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp transients above 58 V. Use Value: Limits voltage excursion to ≤93.6 V during 400 W surges, preventing damage to LDOs and microcontrollers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and field-induced spikes in factory automation. IC Role / Device Role / Timing Role: Parallel-connected TVS on sensor transmitter output to absorb fast-rising transients before they reach PLC inputs. Use Value: Sub-1 ns response ensures clamping occurs before sensitive op-amps or ADC drivers are overstressed. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
|
Use Scenario: Safeguarding Ethernet PHY power pins and bias rails in telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on +3.3 V and +5 V distribution networks upstream of point-of-load regulators. Use Value: 40 A IFSM rating supports repeated surge events without parametric shift or catastrophic failure. |
Use Scenario: Adding secondary-side overvoltage protection on USB-C PD adapter outputs to meet IEC 61000-4-5 Level 3 requirements. IC Role / Device Role / Timing Role: Clamping diode across regulated 20 V output to prevent overvoltage propagation during feedback loop faults. Use Value: Halogen-free HM3 construction meets regional environmental mandates while maintaining 400 W surge capability. |
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/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Acceptable where halogen content is unrestricted; slightly higher material cost for HM3-grade tin plating | Select SMAJ58AHM3/I when halogen-free compliance is mandated by OEM or regulatory requirement |
| SMBJ58A-M3/5A | Same VWM/VBR/VC, but SMB (DO-214AA) package - 2.5 mm wider, higher thermal mass, 600 W PPPM | Better suited for higher-power or thermally demanding layouts; requires larger PCB footprint | Choose SMBJ58A-M3/5A only if system-level surge testing exceeds 400 W or thermal derating is critical |
Compared with SMAJ58AHE3/I, the SMAJ58AHM3/I adds halogen-free assurance without sacrificing performance; versus SMBJ58A-M3/5A, it trades 200 W extra pulse power for 30 % smaller board area and identical AEC-Q101 qualification.
Availability
SMAJ58AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ58AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMAJ series delivers standardized transient suppression for harsh-environment applications, engineered specifically for AEC-Q101 compliance, high surge robustness, and surface-mount manufacturability in automotive and industrial designs.
FAQ
What is the clamping voltage of SMAJ58AHM3/I at its rated peak pulse current?
The SMAJ58AHM3/I clamps to a maximum of 93.6 V at its specified peak pulse current of 4.3 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and reflects worst-case voltage seen by protected circuitry during surge events. The clamping performance remains consistent across its qualified operating temperature range of –55 °C to +150 °C, making SMAJ58AHM3/I suitable for under-hood automotive use.
Is SMAJ58AHM3/I certified for automotive applications?
Yes, SMAJ58AHM3/I is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control modules, body control units, and ADAS sensor interfaces. The HM3 suffix denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility - all validated per AEC-Q101 stress test requirements. This certification applies directly to the SMAJ58AHM3/I part number as shipped.
How does the SMAJ58AHM3/I differ from the SMAJ58A-E3/61 variant?
The SMAJ58AHM3/I differs from SMAJ58A-E3/61 in three key aspects: it uses halogen-free molding compound (HM3 vs. E3), carries AEC-Q101 qualification (E3 is commercial grade only), and ships in 13-inch tape-and-reel packaging (I-code) versus 7-inch (61-code). Electrically, both share identical VWM, VBR, VC, and PPPM ratings. SMAJ58AHM3/I is therefore selected when automotive qualification and halogen-free compliance are mandatory.
What is the maximum reverse leakage current for SMAJ58AHM3/I at its standoff voltage?
The maximum reverse leakage current (ID) for SMAJ58AHM3/I is 1.0 μA at its 58 V standoff voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss in always-on circuits and avoids false triggering in high-impedance sensing nodes. Leakage remains below 5.0 μA up to +125 °C, supporting reliable operation in industrial and automotive thermal environments without compromising system efficiency or signal integrity.
Can SMAJ58AHM3/I be used in bidirectional configurations?
No, SMAJ58AHM3/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants carry the "CA" suffix (e.g., SMAJ58CA). Using SMAJ58AHM3/I in reverse-biased AC signal paths would result in forward conduction and potential failure. For bidirectional protection, select SMAJ58CA-HM3/I or equivalent - which provides symmetrical clamping in both polarities but shares the same VWM, VBR, and VC magnitudes as SMAJ58AHM3/I.
SMAJ58AHM3/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:
- 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/I FAQ
1.How can I place an order for SMAJ58AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58AHM3/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 SMAJ58AHM3/I reliable?
The price and inventory of SMAJ58AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58AHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ58AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58AHM3/I?
SMAJ58AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58AHM3/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 SMAJ58AHM3/I?
For technical support, including SMAJ58AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58AHM3/I requirements.
6.How does Aetrix verify that SMAJ58AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ58AHM3/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 SMAJ58AHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ58AHM3/I?
All SMAJ58AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58AHM3/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 SMAJ58AHM3/I part is unused and in its original packaging.
Return procedure for SMAJ58AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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