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onsemi 1.5SMC62AT3
- Part No.:
- 1.5SMC62AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC62AT3.pdf
- Description:
- TVS DIODE 53VWM 85VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,419
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Product details
Overview
1.5SMC62AT3 from ON Semiconductor is a unidirectional 1500 W peak power Zener transient voltage suppressor (TVS) designed for parallel overvoltage protection of DC power rails and signal lines. It features a 53 V working peak reverse voltage (VRWM), 62 V breakdown voltage (VBR) at 1 mA test current, clamps to 85 V at 17.7 A peak pulse current, and responds in under 1 ns. It is used in industrial power supplies to protect rectifier outputs and DC bus lines against lightning-induced surges.
For engineers reviewing the 1.5SMC62AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin above operating voltage, clamping voltage vs. protected device's absolute maximum rating, surge current capability per IEC 61000-4-5, thermal derating at elevated ambient temperatures, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The 1.5SMC62AT3 operates as a unidirectional avalanche diode, conducting only in reverse bias when transient voltage exceeds its breakdown threshold. Its low zener impedance and fast <1 ns response enable effective clamping of high-energy transients without significant overshoot-provided layout minimizes trace inductance.
It is rated for 1500 W non-repetitive peak pulse power (10/1000 µs waveform), with thermal resistance from junction-to-lead of 54.6 °C/W and junction-to-ambient of 165 °C/W. Derating begins above 75°C for lead temperature and above 25°C for ambient temperature, per defined curves in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 53 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC rail by ≥10% for reliable margin. |
| VBR @ IT=1 mA | 62 V (min–max: 58.9–65.1 V) - Breakdown occurs within this band at 1 mA; defines turn-on threshold tolerance. |
| VC @ IPP=17.7 A | 85 V - Clamped voltage during 10/1000 µs surge; must stay below protected IC's absolute max rating. |
| IPP | 17.7 A - Peak pulse current supported at 85 V clamp; correlates to 1500 W peak power (VC × IPP). |
| IR @ VRWM | 5 µA max - Reverse leakage at 53 V; ensures minimal standby power loss and no false triggering. |
| Response Time | <1 ns - Time from transient onset to conduction onset; critical for protecting fast logic and analog interfaces. |
| ESD Rating | Class 3 (>16 kV HBM) - Withstands human-body-model ESD events without degradation. |
Pinout & Package
1.5SMC62AT3 is housed in an SMC (DO-214AB) surface-mount plastic package (Case 403), featuring a modified L-bend lead form for enhanced pad adhesion and cathode polarity indicated by a molded notch. The device has two terminals: anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction path during reverse transient. |
| Cathode | High-side connection point | Connected to protected line (e.g., +48 V rail); polarity notch identifies this terminal visually. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Qualified for isolated loop circuit protection-validates performance in telecom and industrial interface applications requiring safety certification. |
| Surmetic™ Package | Void-free, thermosetting plastic housing with corrosion-resistant leads and 260°C solderability-ensures long-term reliability in harsh environments. |
| Low Clamping Ratio | VC/VBR = 85/62 ≈ 1.37 - Tight ratio enables robust protection margin without overdesigning downstream TVS staging. |
| Thermal Derating Support | Defined derating curves for ambient (25°C baseline) and lead (75°C baseline) temperatures-enables accurate lifetime and power handling estimation in real PCB layouts. |
| ESD Robustness | Class 3 HBM (>16 kV) - Eliminates need for additional ESD protection on board-level inputs subject to handling stress. |
Applications
| Industrial Power Supply Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protecting the DC output of a 48 V telecom rectifier module against lightning-induced surges on the distribution bus. IC Role / Device Role / Timing Role: Unidirectional TVS placed across +48 V and GND, clamping transients before they reach downstream DC-DC converters and monitoring ICs. Use Value: 85 V clamping voltage ensures protected devices rated to 100 V abs max remain within safe operating area during 1500 W surges. |
Use Scenario: Safeguarding RS-485 transceivers connected to outdoor field wiring exposed to induced surges. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting energy away from transceiver pins during fast-rising common-mode transients. Use Value: Sub-1 ns response time prevents overshoot from exceeding transceiver's ±15 V fault tolerance before clamping engages. |
| Medical Equipment AC/DC Input Stage | Automotive Body Control Module (BCM) Power Rail |
Use Scenario: Guarding primary-side input capacitors and bridge rectifiers in Class II medical AC/DC adapters against line transients. IC Role / Device Role / Timing Role: Mounted across bulk capacitor terminals to absorb differential-mode surges meeting IEC 61000-4-5 Level 3 (2 kV). Use Value: UL 497B recognition confirms compliance with isolation barrier requirements for patient-connected equipment. |
Use Scenario: Protecting 12 V battery-supplied microcontroller power rails in BCMs from load-dump spikes (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Placed directly at MCU VDD pin to clamp 120 V/100 ms transients before internal LDOs saturate. Use Value: 1500 W peak power rating sustains multiple load-dump events without parametric shift or catastrophic failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Lower peak power (600 W), SMB package (smaller footprint), VRWM = 55.1 V, VC = 103 V @ 5.8 A | Insufficient for 1500 W IEC 61000-4-5 surges; suitable only for lower-energy ESD or localized board-level transients. | Select when space-constrained and surge energy is limited to ≤600 W; verify clamping voltage margin remains adequate. |
| 1.5KE62A | Through-hole DO-201 package, same electrical specs (VRWM = 53 V, VBR = 62 V, VC = 85 V), but larger footprint and manual assembly requirement | Not suitable for automated SMT production; requires wave solder or hand-soldering; higher thermal resistance (RJA = 125 °C/W). | Choose only for legacy through-hole designs or prototyping where rework flexibility outweighs volume manufacturing efficiency. |
Compared with SMBJ64A and 1.5KE62A, the 1.5SMC62AT3 delivers optimal balance of high-energy surge handling (1500 W), SMT compatibility, certified safety (UL 497B), and tight clamping ratio-making it the preferred choice for production-grade industrial and telecom power rail protection.
Availability
1.5SMC62AT3 is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure equipment, medical AC/DC adapters, and automotive body control modules requiring stable component supply and full compliance with UL 497B and IEC 61000-4-5 standards.
Supply support for 1.5SMC62AT3 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 manufacturer specializing in power management, analog, sensor, and discrete solutions for automotive, industrial, cloud, and medical markets.
The 1.5SMC62AT3 belongs to the SMC-series transient voltage suppressors-a family engineered for high-reliability overvoltage protection in surface-mount power systems where surge immunity, thermal stability, and safety certification are mandatory.
FAQ
What is the working peak reverse voltage (VRWM) of the 1.5SMC62AT3?
The 1.5SMC62AT3 has a VRWM of 53 V, meaning it remains non-conductive up to this DC or continuous peak reverse voltage. This value ensures sufficient margin above common 48 V systems while guaranteeing reliable clamping onset before protected components exceed their absolute maximum ratings. The 1.5SMC62AT3 datasheet specifies this parameter under standard test conditions at 25°C.
How does the 1.5SMC62AT3 differ from bidirectional TVS diodes?
The 1.5SMC62AT3 is unidirectional and conducts only during reverse-biased transients-ideal for DC power rail protection where polarity is fixed. Unlike bidirectional variants, it does not suppress positive-going transients on grounded lines. Its cathode-marked polarity must be observed during placement; reversing it would prevent clamping. The 1.5SMC62AT3 datasheet explicitly states bidirectional devices are not offered in this series.
Is the 1.5SMC62AT3 UL 497B recognized?
Yes, the entire 1.5SMC62AT3 series carries UL 497B recognition (File #116110) for isolated loop circuit protection. This certification validates its performance in telecom and industrial interfaces requiring safety-compliant transient suppression. The 1.5SMC62AT3 meets rigorous tests including strike voltage breakdown, endurance conditioning, and dielectric withstand-beyond basic flammability requirements.
What is the maximum clamping voltage of the 1.5SMC62AT3 at its rated peak pulse current?
The 1.5SMC62AT3 clamps to a maximum of 85 V at its rated peak pulse current of 17.7 A (10/1000 µs waveform). This VC value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The 1.5SMC62AT3 achieves this with a clamping ratio of ~1.37, supporting robust design margins.
Can the 1.5SMC62AT3 be used in automotive load-dump protection?
Yes-the 1.5SMC62AT3 is suitable for ISO 7637-2 Pulse 5a load-dump protection on 12 V automotive power rails. Its 1500 W peak power rating, 85 V clamping voltage, and ability to sustain multiple high-energy events make it appropriate for body control modules and infotainment power inputs. Layout best practices-short traces, direct grounding, and proximity to protected ICs-are essential to realize the 1.5SMC62AT3's sub-1 ns response advantage.
1.5SMC62AT3 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):
- 53V
- Voltage - Breakdown (Min):
- 58.9V
- Voltage - Clamping (Max) @ Ipp:
- 85V
- Current - Peak Pulse (10/1000µs):
- 17.7A
- 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
1.5SMC62AT3 FAQ
1.How can I place an order for 1.5SMC62AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC62AT3 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 1.5SMC62AT3 reliable?
The price and inventory of 1.5SMC62AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC62AT3 is usually 5 days.
3.What payment methods are accepted for 1.5SMC62AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC62AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC62AT3?
1.5SMC62AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC62AT3 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 1.5SMC62AT3?
For technical support, including 1.5SMC62AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC62AT3 requirements.
6.How does Aetrix verify that 1.5SMC62AT3 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC62AT3 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 1.5SMC62AT3 meets industry standards.
7.What is the process for return or replacement of 1.5SMC62AT3?
All 1.5SMC62AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC62AT3, 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 1.5SMC62AT3 part is unused and in its original packaging.
Return procedure for 1.5SMC62AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC62AT3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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