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Vishay General Semiconductor - Diodes Division SMAJ58A-M3/61
- Part No.:
- SMAJ58A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58A-M3/61.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,424
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Product details
Overview
SMAJ58A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 58 V standoff voltage (VWM), 64.4–71.2 V breakdown range at 1 mA, 93.6 V maximum clamping voltage at 4.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive infotainment power supplies, industrial sensor I/O protection, and telecom line interface circuits.
For engineers reviewing the SMAJ58A-M3/61 datasheet, SMAJ58A-M3/61 pinout, SMAJ58A-M3/61 application, or SMAJ58A-M3/61 equivalent, key selection criteria include verified clamping performance under 4.3 A surge, unidirectional polarity with cathode band marking, SMA (DO-214AC) package thermal resistance (RθJA = 120 °C/W), and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and fast response (<1 ps), while the unidirectional configuration blocks reverse leakage below VWM and clamps positive transients only.
Rated for 40 A non-repetitive forward surge (8.3 ms half-sine), it supports robust protection in systems exposed to ISO 7637-2 pulse 1/2a/5a or IEC 61000-4-5 surges. The SMA package enables automated placement and meets MSL Level 1 (260 °C reflow peak), with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit DC rail. |
| VBR @ IT = 1 mA | 64.4–71.2 V - Verified avalanche onset range; ensures reliable triggering above normal operating margin. |
| VC @ IPPM = 4.3 A | 93.6 V - Clamped voltage during 10/1000 μs surge; defines worst-case stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling capability; sufficient for automotive load-dump and inductive switching events. |
| IFSM | 40 A - Single half-sine surge rating (8.3 ms); validates robustness against high-energy transients. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| Package | SMA (DO-214AC) - Surface-mount outline with 2.54 mm lead pitch; compatible with standard SMT assembly and IPC-7351B footprints. |
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 system ground or lower-potential node; conducts during positive transients when cathode is biased higher. |
| Cathode | Reverse-biased terminal | Connected to protected line (e.g., 58 V rail); avalanche initiates here when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients without sacrificing board space - critical for automotive and industrial 24/48 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream MOSFETs or microcontrollers during clamping - improves system reliability. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global electronics manufacturing without compromising surge performance. |
| MSL Level 1 moisture sensitivity | Supports standard reflow profiles up to 260 °C peak without preconditioning - reduces production complexity and cost. |
| AEC-Q101 qualification option (HM3 variant) | Validates suitability for automotive applications requiring extended temperature cycling, humidity, and mechanical stress testing. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-supplied ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across input rail, clamping surges within nanoseconds. Use Value: Limits rail voltage to ≤93.6 V during 4.3 A surge, preventing damage to 60 V-rated DC-DC controllers and CAN transceivers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Unidirectional TVS connected between sensor output and ground, absorbing ESD and cable discharge events. Use Value: Maintains signal integrity by clamping transients before they reach 12-bit ADC inputs, with <1 μA leakage at 58 V. |
| Telecom Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end surge suppression on RS-485 or Ethernet PHY power pins in base station remote units. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated 3.3/5 V bias rails feeding communication ICs. Use Value: Withstands repeated 10/1000 μs surges up to 400 W, meeting IEC 61000-4-5 Level 3 immunity requirements. |
Use Scenario: Input-stage transient protection in universal AC/DC adapters rated for 58 V DC output rails. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after rectifier but before bulk capacitor to absorb switching spikes. Use Value: Prevents capacitor overvoltage and MOSFET avalanche failure during no-load or dynamic load transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3). | Preferred for commercial-grade designs where halogen content is unrestricted. | Select E3 for cost-sensitive non-automotive applications; M3 required for halogen-free mandates. |
| SMAJ58AHE3_A/H | AEC-Q101 qualified, same VWM/VC, but with automotive-grade screening and traceability. | Required for automotive ECUs, ADAS modules, and other AEC-Q101-mandated systems. | Choose HE3/HM3 variants when automotive qualification and extended temperature validation are mandatory. |
Compared with SMAJ58A-M3/61, the E3 variant offers identical protection performance at lower cost for commercial use, while the HE3 variant adds automotive qualification and process controls - enabling drop-in replacement only when AEC-Q101 compliance is required.
Availability
SMAJ58A-M3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom interface surge suppression requiring stable component supply and halogen-free compliance.
Supply support for SMAJ58A-M3/61 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 application-specific performance.
The SMAJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where precise clamping, low leakage, and robust surge handling are essential.
FAQ
What is the maximum clamping voltage of the SMAJ58A-M3/61 under a 10/1000 μs surge?
The SMAJ58A-M3/61 has a maximum clamping voltage (VC) of 93.6 V at 4.3 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ58A-M3/61 maintains this clamping performance across its specified operating temperature range.
Does the SMAJ58A-M3/61 meet automotive qualification standards?
The SMAJ58A-M3/61 itself is commercial-grade and halogen-free (M3 suffix), but not AEC-Q101 qualified. However, Vishay offers the pin-compatible SMAJ58AHM3_A/H variant - identical in electrical specs and packaging - which is fully AEC-Q101 qualified for automotive applications. The SMAJ58A-M3/61 remains suitable for non-automotive industrial and telecom uses.
How does the SMAJ58A-M3/61 differ from bidirectional TVS diodes like SMAJ58CA?
The SMAJ58A-M3/61 is unidirectional and blocks reverse voltage up to 58 V while clamping positive transients only; SMAJ58CA is bidirectional and clamps transients of either polarity. The SMAJ58A-M3/61 exhibits lower leakage (<1 μA at VWM) and is preferred for DC rail protection where polarity is fixed. SMAJ58CA suits AC-coupled or floating signal lines.
What is the thermal resistance of the SMAJ58A-M3/61 in standard PCB layout?
The SMAJ58A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB layout and guides thermal derating - for example, power dissipation must be reduced by ~0.8% per °C above 25 °C ambient to maintain TJ ≤ 150 °C.
Can the SMAJ58A-M3/61 be used in place of older P6SMB58A devices?
Yes, the SMAJ58A-M3/61 is a direct surface-mount replacement for through-hole P6SMB58A, sharing identical VWM (58 V), VBR, and VC specs. Its SMA package offers smaller footprint and automated assembly compatibility, while maintaining 400 W surge capability. Layout redesign is required due to DO-214AC vs DO-214AA footprint differences, but electrical behavior is functionally equivalent.
SMAJ58A-M3/61 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-M3/61 FAQ
1.How can I place an order for SMAJ58A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58A-M3/61 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-M3/61 reliable?
The price and inventory of SMAJ58A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ58A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58A-M3/61?
SMAJ58A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58A-M3/61 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-M3/61?
For technical support, including SMAJ58A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58A-M3/61 requirements.
6.How does Aetrix verify that SMAJ58A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ58A-M3/61 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-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ58A-M3/61?
All SMAJ58A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58A-M3/61, 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-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ58A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ58A-M3/61 Tags
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