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onsemi 1SMC58AT3
- Part No.:
- 1SMC58AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1SMC58AT3.pdf
- Description:
- TVS DIODE 58VWM 93.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,012
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Product details
Overview
1SMC58AT3 from ON Semiconductor is a unidirectional 1500 W peak power Zener transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for parallel clamping of high-energy transients. It features a 58 V working peak reverse voltage (VRWM), 71.2 V maximum clamping voltage (VC) at 16 A peak pulse current (IPP), and <1 ns response time - used to protect DC power rails, automotive ECUs, and industrial I/O interfaces against ESD and lightning-induced surges.
For engineers reviewing the 1SMC58AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, VC margin relative to protected IC absolute maximum ratings, UL 497B certification for isolated loop protection, and thermal derating above 75°C ambient or lead temperature.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt device: under normal bias it presents <5 µA leakage above 10 V; during transient events exceeding VRWM = 58 V, it avalanches into low-impedance conduction within <1 ns to clamp voltage at ≤93.6 V (VC) for 1 ms pulses. Its 1500 W peak power rating is defined per 10/1000 µs waveform with non-repetitive duty cycle.
Thermal design requires attention to junction-to-lead resistance (RJL = 18.3 °C/W) and junction-to-ambient resistance (RJA = 165 °C/W); derating begins at 75°C for lead temperature and 25°C for ambient. The device is Pb-free, UL 497B recognized (QVGQ2), and rated for −65°C to +150°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 58 V - maximum continuous reverse voltage before clamping; must be ≥ circuit's DC or peak operating voltage |
| VBR @ IT=1 mA | 64.4–67.8 V - breakdown threshold range; ensures reliable turn-on above VRWM with margin |
| VC @ IPP=16 A | 93.6 V - maximum clamped voltage during 1 ms surge; defines worst-case stress on downstream components |
| IPP | 16 A - peak pulse current corresponding to VC; determines minimum series impedance needed for safe energy dissipation |
| Leakage @ VRWM | <5 µA - negligible standby power loss and signal integrity impact in high-impedance circuits |
| Response Time | <1 ns - enables suppression before fast transients (e.g., ESD) damage sensitive inputs |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
| UL Recognition | UL 497B (QVGQ2) - certified for isolated loop circuit protection, including strike voltage and endurance testing |
Pinout & Package
Package: SMC (DO-214AB), plastic surface-mount case 403, cathode indicated by molded notch. Dimensions: 5.59–6.10 mm (D) × 6.60–7.11 mm (E) × 1.90–2.41 mm (A), with modified L-bend leads for enhanced solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; establishes clamping reference point |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 24 V rail); avalanche conduction occurs from cathode to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 5a) without failure when properly mounted on adequate copper area |
| UL 497B recognition | Validated for telecom and industrial isolated loop protection - exceeds basic flammability requirements with full electrical safety testing |
| Pb-free Surmetic® package | RoHS-compliant construction with corrosion-resistant finish and solderable leads rated for 260°C/10 s reflow |
| Low dynamic impedance | Clamping voltage remains tightly controlled across 1–16 A IPP range - critical for predictable overvoltage limiting |
| −65°C to +150°C operating range | Suitable for under-hood automotive, outdoor industrial, and medical equipment environments without derating penalties |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) and body control modules against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Shunt clamping device placed directly across input rail, activated only during overvoltage events >58 V. Use Value: Limits transient voltage to ≤93.6 V, preventing damage to downstream regulators and microcontrollers rated for 36 V absolute max. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on each 24 V input channel, referenced to common ground. Use Value: Provides Class 3 ESD immunity and withstands repetitive 1 kV/500 A surge tests per IEC 61000-4-5, ensuring long-term field reliability. |
| Medical Equipment Power Rails | Telecom Isolated Interface Circuits |
|
Use Scenario: Clamping auxiliary 12–48 V DC rails in diagnostic imaging systems and patient monitors exposed to EMI-rich hospital environments. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to divert fast transients without affecting steady-state operation. Use Value: Maintains <5 µA leakage at 58 V, avoiding interference with precision analog front-ends while delivering sub-1 ns response to ESD events. |
Use Scenario: Protecting RS-485 or CAN bus transceivers connected via isolated power and signal transformers in building automation networks. IC Role / Device Role / Timing Role: UL 497B-certified TVS on secondary side of isolation barrier, clamping surges coupled through transformer parasitics. Use Value: Meets UL 497B requirements for isolated loop protection - validated for strike voltage breakdown and endurance under repeated surge stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | Same VRWM (58 V) and VC (93.6 V), but lower 600 W peak power rating and SMB package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-current lightning surges | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only |
| 1.5SMC58A | Identical electrical specs and SMC package, but legacy ON Semi marking (no 'G' suffix); RoHS status not guaranteed | No functional difference; may lack UL 497B documentation or Pb-free compliance traceability | Prefer 1SMC58AT3 for new designs requiring documented RoHS compliance and UL certification |
Compared with SMBJ58A and 1.5SMC58A, the 1SMC58AT3 delivers higher surge robustness (1500 W vs. 600 W), assured Pb-free compliance, and UL 497B certification - making it the preferred choice for automotive, industrial, and medical applications demanding verified isolation barrier protection and high-energy transient immunity.
Availability
1SMC58AT3 is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and medical equipment power rails requiring stable component supply, long lifecycle support, and certified surge immunity.
Supply support for 1SMC58AT3 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
ON Semiconductor is a global semiconductor supplier specializing in energy-efficient electronics, with leadership in automotive, industrial, cloud power, and sensing solutions.
The 1SMC58AT3 belongs to the SMC-series Zener TVS family, engineered specifically for high-power transient suppression in harsh environments - emphasizing robust clamping, fast response, and regulatory compliance for mission-critical protection.
FAQ
What is the clamping voltage of the 1SMC58AT3 at its rated peak pulse current?
The 1SMC58AT3 has a maximum clamping voltage (VC) of 93.6 V at 16 A peak pulse current (IPP), measured under 1 ms 10/1000 µs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during surge events and must be compared against the absolute maximum ratings of downstream components to ensure safe operation.
Is the 1SMC58AT3 suitable for bidirectional transient suppression?
No, the 1SMC58AT3 is explicitly a unidirectional TVS diode, intended for DC or single-polarity AC applications where the protected line remains positive relative to ground. It lacks symmetrical breakdown characteristics and cannot suppress negative-going transients - use a bidirectional variant like 1SMC58AT3C only if AC or dual-polarity protection is required.
Does the 1SMC58AT3 meet UL 497B requirements for isolated loop protection?
Yes, the entire 1SMC5.0AT3 series, including the 1SMC58AT3, holds UL 497B recognition (File #E210057, category QVGQ2) for isolated loop circuit protection. This certification covers rigorous testing including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming suitability for telecom and industrial isolation barriers.
What is the thermal resistance and derating behavior of the 1SMC58AT3?
The 1SMC58AT3 has a junction-to-lead thermal resistance (RJL) of 18.3 °C/W and junction-to-ambient resistance (RJA) of 165 °C/W. DC power dissipation must be derated linearly above 75°C lead temperature (4.0 W base) or above 25°C ambient (0.75 W base). Peak pulse power remains valid only at TL = 25°C unless adjusted using Figure 3 derating curves.
How does the 1SMC58AT3 compare to standard Zener diodes in surge protection roles?
Unlike general-purpose Zener diodes, the 1SMC58AT3 is optimized for transient suppression: it offers 1500 W peak power handling, <1 ns response time, <5 µA leakage at VRWM, and UL 497B certification. Standard Zeners lack controlled dynamic impedance, surge-rated packaging, and standardized pulse testing - making the 1SMC58AT3 far more reliable for ESD, lightning, and load-dump protection.
1SMC58AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 16A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
1SMC58AT3 FAQ
1.How can I place an order for 1SMC58AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMC58AT3 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 1SMC58AT3 reliable?
The price and inventory of 1SMC58AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMC58AT3 is usually 5 days.
3.What payment methods are accepted for 1SMC58AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMC58AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMC58AT3?
1SMC58AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMC58AT3 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 1SMC58AT3?
For technical support, including 1SMC58AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMC58AT3 requirements.
6.How does Aetrix verify that 1SMC58AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMC58AT3 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 1SMC58AT3 meets industry standards.
7.What is the process for return or replacement of 1SMC58AT3?
All 1SMC58AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMC58AT3, 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 1SMC58AT3 part is unused and in its original packaging.
Return procedure for 1SMC58AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMC58AT3 Tags
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