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Vishay General Semiconductor - Diodes Division SMAJ58A-M3/5A
- Part No.:
- SMAJ58A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58A-M3/5A.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,117
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Product details
Overview
SMAJ58A-M3/5A 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), commonly deployed to protect MOSFET gate drivers and automotive sensor interfaces.
For engineers reviewing the SMAJ58A-M3/5A datasheet, SMAJ58A-M3/5A pinout, SMAJ58A-M3/5A application, or SMAJ58A-M3/5A equivalent, key selection criteria include unidirectional polarity, 120 °C/W junction-to-ambient thermal resistance, AEC-Q101 qualification eligibility (via HM3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal bias it presents high impedance (>1 μA leakage at 58 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance during 10/1000 μs surges.
The device is rated for repetitive 400 W pulses at TA = 25 °C (derated above 25 °C per Fig. 2), with 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity. Its unidirectional configuration requires cathode-band orientation during PCB layout, and it delivers 93.6 V clamping at 4.3 A - critical for safeguarding 60 V-rated power stages against ISO 7637-2 pulse 1/2a/5a events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC working range |
| VBR min/max | 64.4 V / 71.2 V at 1 mA - guaranteed breakdown onset window; determines minimum overvoltage margin before clamping |
| VC @ IPPM | 93.6 V at 4.3 A - clamped voltage seen by protected circuit during full-rated surge; must be below IC absolute max rating |
| PPPM | 400 W (10/1000 μs) - peak transient energy absorption capacity; derates to 300 W above 78 V |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on standard 5.0 mm × 5.0 mm pads; governs power derating vs. ambient temp |
| IFSM | 40 A (8.3 ms half-sine) - non-repetitive forward surge rating; relevant for inadvertent forward-bias faults |
| TJ max. | +150 °C - maximum allowable junction temperature; sets upper limit for thermal design and lifetime reliability |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; must be oriented correctly relative to cathode band |
| Cathode | Reverse-biased terminal (marked with band) | Connected to higher-potential side (e.g., VBUS); conducts during overvoltage to clamp to VC |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 surge events up to 4 kV in 2 Ω/12 Ω coupling networks |
| 93.6 V clamping voltage at 4.3 A | Ensures protected 60 V logic or power devices remain within safe operating area during worst-case transients |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow without preconditioning; eliminates moisture-related popcorning risk |
| Glass passivated junction | Delivers stable VBR over temperature and life; reduces parameter drift vs. epoxy-passivated alternatives |
| AEC-Q101 qualification path (HM3 suffix) | Enables use in automotive powertrain and body electronics where component stress testing is mandated |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 12 V/24 V battery-fed ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor. Use Value: Clamps ISO 16750-2 load dump spikes (up to 35 V for 12 V systems, 65 V for 24 V) to ≤93.6 V, preventing downstream regulator failure. |
Use Scenario: Input stage surge suppression for 48 V industrial motor controllers exposed to inductive switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus input terminals before EMI filter. Use Value: Absorbs 400 W transients from contactor bounce or regenerative braking feedback, maintaining bus voltage integrity. |
| Telecom Power Supply Rails | Automotive Sensor Signal Lines |
Use Scenario: Secondary-side overvoltage protection on isolated 48 V telecom rectifier outputs. IC Role / Device Role / Timing Role: Standoff-rated TVS on +48 V output rail, downstream of DC-DC converter. Use Value: Limits fault-induced overvoltage to <94 V during output short-circuit recovery, preserving PoE injector compliance. |
Use Scenario: CAN/LIN bus line protection in vehicle cabin modules subject to ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS on signal line with cathode tied to VCC (5 V or 3.3 V). Use Value: Provides sub-nanosecond response to ±8 kV contact ESD (IEC 61000-4-2), limiting voltage excursion to <94 V at line receiver inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A-E3/5A | Same electrical specs; RoHS-compliant but not halogen-free; uses matte tin plating per J-STD-002 | Preferred for commercial-grade industrial equipment where halogen content is unrestricted | Select when cost-sensitive designs require standard RoHS compliance without halogen-free certification |
| SMAJ58AHM3_A/I | Identical specs plus AEC-Q101 qualification; packaged in 13" tape/reel (7500 pcs); HM3 denotes halogen-free + AEC-Q101 | Required for automotive OEM Tier-1 power modules and ADAS domain controllers | Choose when automotive qualification, traceability, and extended temperature validation are mandatory |
Compared with SMAJ58A-M3/5A, the E3 variant offers identical protection performance at lower cost for non-automotive use, while the HM3_A/I version adds validated automotive reliability and packaging for high-volume vehicle programs - neither is pin-compatible with bidirectional variants like SMAJ58CA.
Availability
SMAJ58A-M3/5A is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom power supply rails, and automotive sensor signal lines requiring stable component supply and halogen-free compliance.
Supply support for SMAJ58A-M3/5A 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 optimization.
The SMAJ series targets high-energy transient suppression in space-constrained SMT applications, engineered for rapid response, stable clamping, and compatibility with automotive and industrial environmental stress standards.
FAQ
What is the maximum clamping voltage of SMAJ58A-M3/5A under rated surge conditions?
The SMAJ58A-M3/5A exhibits a maximum clamping voltage (VC) of 93.6 V when subjected to its rated 4.3 A peak pulse current (IPPM) using the standardized 10/1000 μs waveform. This value is measured at TA = 25 °C on 5.0 mm × 5.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ58A-M3/5A maintains this clamping performance across its operational temperature range, with minor derating above 25 °C per Figure 2 in the datasheet.
Is SMAJ58A-M3/5A suitable for automotive applications?
SMAJ58A-M3/5A itself is not AEC-Q101 qualified; however, it shares identical electrical and mechanical specifications with the AEC-Q101-qualified variant SMAJ58AHM3_A/I, which uses the same HM3 halogen-free, RoHS-compliant construction. For production automotive use, engineers must specify the HM3-suffixed part. The SMAJ58A-M3/5A remains appropriate for automotive prototype evaluation, non-safety-critical subsystems, or commercial-grade modules where formal qualification is not mandated.
How does the thermal resistance of SMAJ58A-M3/5A affect its surge handling capability?
The SMAJ58A-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W on standard 5.0 mm × 5.0 mm copper pads. This value directly limits its ability to sustain repetitive surges: each 400 W pulse causes ~4800 °C of theoretical junction rise, necessitating strict duty cycle control (<0.01 %). For reliable operation, designers must ensure adequate copper area, minimize ambient temperature, and avoid stacking multiple surges without sufficient cooling time. The SMAJ58A-M3/5A relies on transient thermal impedance-not steady-state dissipation-for surge survival.
What is the polarity configuration of SMAJ58A-M3/5A and how is it identified on the package?
SMAJ58A-M3/5A is a unidirectional TVS diode, meaning it conducts only when the cathode is biased positive relative to the anode. Polarity is marked on the SMA (DO-214AC) package by a visible cathode band near one end - this band must be aligned toward the higher-potential node (e.g., VBUS or signal line) during PCB layout. Unlike bidirectional variants (e.g., SMAJ58CA), the SMAJ58A-M3/5A has no marking on the anode end and exhibits forward voltage drop (~3.5 V at 25 A) only in the cathode-to-anode direction.
Can SMAJ58A-M3/5A replace SMAJ58CA in a bidirectional protection circuit?
No, SMAJ58A-M3/5A cannot replace SMAJ58CA in bidirectional circuits because it lacks symmetrical conduction: SMAJ58A-M3/5A conducts only in reverse (cathode-positive) mode and blocks forward current above ~3.5 V, whereas SMAJ58CA clamps equally in both directions with matched VBR and VC. Substituting SMAJ58A-M3/5A would leave the circuit unprotected during negative-going transients. The SMAJ58A-M3/5A is strictly for unidirectional rail protection; bidirectional requirements demand the CA-suffixed variant or dual-diode configurations.
SMAJ58A-M3/5A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ58A-M3/5A FAQ
1.How can I place an order for SMAJ58A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58A-M3/5A 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 SMAJ58A-M3/5A reliable?
The price and inventory of SMAJ58A-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58A-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ58A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58A-M3/5A?
SMAJ58A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58A-M3/5A 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 SMAJ58A-M3/5A?
For technical support, including SMAJ58A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58A-M3/5A requirements.
6.How does Aetrix verify that SMAJ58A-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ58A-M3/5A 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 SMAJ58A-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ58A-M3/5A?
All SMAJ58A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58A-M3/5A, 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 SMAJ58A-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ58A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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