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onsemi 1SMC13AT3
- Part No.:
- 1SMC13AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1SMC13AT3.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,461
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Product details
Overview
1SMC13AT3 from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 13 V working peak reverse voltage (VRWM), 14.4 V nominal breakdown voltage (VBR) at 1 A test current, 21.5 V maximum clamping voltage (VC) at 69.7 A peak pulse current, and sub-1 ns response time. It is used in automotive power line protection and industrial DC power supply inputs.
For engineers reviewing the 1SMC13AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, VC < protected IC's absolute maximum rating, peak pulse current handling under IEC 61000-4-5 waveforms, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The 1SMC13AT3 operates as a Zener-based avalanche clamp in reverse-biased configuration, triggered when transient voltage exceeds its breakdown threshold. Its low dynamic impedance ensures stable clamping during high-current surges, while its thermally robust Surmetic SMC package supports 1500 W peak power dissipation at 1 ms pulse width.
It is rated for −65 °C to +150 °C operating temperature, exhibits <5 µA leakage above 10 V, and meets Class 3 ESD immunity (>16 kV HBM). The device is Pb-free, RoHS-compliant, and UL 497B recognized for isolated loop circuit protection - a requirement for telecom and industrial interface designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 13 V - Maximum continuous reverse operating voltage before clamping begins; must be ≥ system DC bus voltage. |
| VBR @ IT = 1 A | 14.4 V (nominal) - Avalanche conduction initiates reliably at this voltage, enabling predictable surge turn-on. |
| VC @ IPP = 69.7 A | 21.5 V - Maximum clamped voltage seen by downstream circuitry during full-rated 1500 W transient event. |
| Peak Pulse Power | 1500 W @ 1 ms - Withstands IEC 61000-4-5 10/1000 µs surge waveforms up to specified energy level. |
| Response Time | <1 ns - Enables suppression before transient propagates into protected ICs; critical for high-speed interfaces. |
| Leakage Current | <5 µA @ VRWM - Minimizes standby power loss and avoids false triggering in low-power systems. |
| UL Recognition | UL 497B (QVGQ2) - Certified for use in isolated loop protectors; validates performance under strike voltage, endurance, and dielectric tests. |
Pinout & Package
Package: SMC (Case 403), surface-mount, void-free thermosetting plastic with modified L-bend leads and molded cathode notch polarity indicator. Dimensions: 5.59–6.10 mm × 6.60–7.11 mm × 1.90–2.41 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current; must be routed with minimal inductance to avoid overshoot. |
| Cathode | High-voltage input terminal; connected to protected line (e.g., 12 V rail, CAN_H, RS-485 A). | Marked by molded notch; reverse-biased during normal operation; avalanche conduction starts here during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables single-device protection against severe transients per IEC 61000-4-5 Level 4 (4 kV line-to-ground), reducing component count. |
| UL 497B recognition | Validates compliance for use in certified isolated loop protectors - required for industrial process control and building automation systems. |
| ESD rating >16 kV HBM | Meets IEC 61000-4-2 Level 4 (15 kV contact) without external pre-filtering, simplifying board-level ESD design. |
| Sub-1 ns response time | Clamps before most microcontrollers or transceivers experience latch-up or gate oxide damage during fast-rising transients. |
| Pb-free Surmetic SMC package | RoHS-compliant, solderable at 260 °C for 10 s, compatible with standard reflow profiles and automated assembly. |
Applications
| Automotive Power Line Protection | Industrial DC Power Input |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground, clamping transients >35 V to ≤21.5 V within <1 ns. Use Value: Prevents permanent damage to voltage regulators and CAN transceivers by limiting peak stress below their 24 V absolute maximum rating. | Use Scenario: Safeguarding programmable logic controllers (PLCs) powered from 24 V DC supplies against field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on main 24 V input, activated only during overvoltage events exceeding 13 V. Use Value: Maintains system uptime by absorbing 1500 W surges without degradation, eliminating need for fuse replacement after transient events. |
| Medical Equipment Interface | Telecom Isolated Loop |
Use Scenario: Shielding patient-monitoring front-end analog inputs from ESD events during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) TVS on signal lines referenced to isolated ground, suppressing ±15 kV HBM discharges. Use Value: Preserves signal integrity and prevents baseline shift in precision amplifiers by limiting clamping overshoot to <21.5 V. | Use Scenario: Protecting RS-485 transceivers in building management systems using UL 497B-certified isolated loops. IC Role / Device Role / Timing Role: UL-recognized TVS on data line side of isolation barrier, meeting strike voltage and endurance requirements per UL 497B. Use Value: Enables regulatory approval of full system without additional certification testing of protection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13A | 600 W peak power, SMB package (smaller footprint), same VRWM and VC. | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for load dump or high-energy industrial surges. | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports). |
| 1.5SMC13A | Same 1500 W rating and SMC package, but non-Pb-free and lacks UL 497B recognition. | Not approved for UL-certified isolated loop circuits; requires additional system-level validation for medical/industrial safety compliance. | Select only for cost-sensitive, non-certified legacy designs where RoHS and UL are not mandated. |
Compared with SMBJ13A and 1.5SMC13A, the 1SMC13AT3 uniquely combines 1500 W surge capability, UL 497B certification, and Pb-free compliance - making it the only choice for new industrial and automotive designs requiring both high-energy protection and regulatory acceptance.
Availability
1SMC13AT3 is available at Aetrix Electronics and suitable for automotive power line protection, industrial DC power input hardening, and medical equipment interface safeguarding requiring stable component supply across multi-year production cycles.
Supply support for 1SMC13AT3 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 delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud computing, and IoT applications.
The 1SMC13AT3 belongs to the SMC-series Zener TVS family, engineered specifically for high-reliability transient suppression in harsh environments - emphasizing surge robustness, regulatory compliance (UL 497B), and thermal stability under repeated stress.
FAQ
What is the clamping voltage of the 1SMC13AT3 at its rated peak pulse current?
The 1SMC13AT3 has a maximum clamping voltage (VC) of 21.5 V at its rated peak pulse current (IPP) of 69.7 A, measured under the standard 10/1000 µs waveform. This value defines the highest voltage that will appear across protected circuitry during a full 1500 W transient event, ensuring downstream components remain within safe operating limits.
Is the 1SMC13AT3 suitable for bidirectional signal line protection?
No, the 1SMC13AT3 is a unidirectional TVS diode and must not be used on AC-coupled or bidirectional data lines such as RS-485 or USB D+/D− without external biasing. For those applications, a bidirectional variant like 1SMC13AT3G (if available) or dedicated bidirectional TVS (e.g., SMBJ13CA) is required - the 1SMC13AT3 conducts only in reverse avalanche mode.
Does the 1SMC13AT3 meet UL 497B requirements for isolated loop protection?
Yes, the entire 1SMC5.0AT3 series - including the 1SMC13AT3 - carries UL 497B recognition under file #E210057 in the Protector category. It passed all required tests including Strike Voltage Breakdown, Endurance Conditioning, and Dielectric Withstand, making it suitable for certified isolated loop circuits in industrial and telecom applications.
What is the maximum allowable junction temperature for continuous operation of the 1SMC13AT3?
The 1SMC13AT3 has an operating junction temperature range of −65 °C to +150 °C. For continuous DC power dissipation, derating begins above 75 °C at 18.3 °C/W junction-to-lead thermal resistance; at 25 °C ambient, its DC power limit is 0.75 W with further reduction per the published derating curve in Figure 3 of the datasheet.
How does the 1SMC13AT3 differ from the older 1SMC13A part number?
The 1SMC13AT3 includes the "T3" suffix indicating tape-and-reel packaging (2500 units/reel) and "G" denoting Pb-free construction per RoHS. Electrically identical to 1SMC13A, the 1SMC13AT3 replaces legacy versions in new designs requiring lead-free compliance and automated assembly compatibility - no circuit or layout changes are needed for drop-in replacement.
1SMC13AT3 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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 69.7A
- 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
1SMC13AT3 FAQ
1.How can I place an order for 1SMC13AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMC13AT3 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 1SMC13AT3 reliable?
The price and inventory of 1SMC13AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMC13AT3 is usually 5 days.
3.What payment methods are accepted for 1SMC13AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMC13AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMC13AT3?
1SMC13AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMC13AT3 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 1SMC13AT3?
For technical support, including 1SMC13AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMC13AT3 requirements.
6.How does Aetrix verify that 1SMC13AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMC13AT3 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 1SMC13AT3 meets industry standards.
7.What is the process for return or replacement of 1SMC13AT3?
All 1SMC13AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMC13AT3, 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 1SMC13AT3 part is unused and in its original packaging.
Return procedure for 1SMC13AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMC13AT3 Tags
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