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onsemi 1.5SMC36AT3
- Part No.:
- 1.5SMC36AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC36AT3.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,458
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Product details
Overview
1.5SMC36AT3 from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of DC power rails and signal lines. It features a 30.8 V working peak reverse voltage (VRWM), 36 V breakdown voltage (VBR) at 1 mA test current, and clamps to 49.9 V at 30 A peak pulse current - enabling robust surge immunity in automotive power supplies and industrial I/O interfaces.
For engineers reviewing the 1.5SMC36AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin vs. system operating voltage, 1 ms surge rating compliance, UL 497B recognition for isolated loop protection, and SMC package thermal performance under sustained transients.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt device triggered by avalanche breakdown above its specified VBR. Its sub-1 ns response time ensures suppression before downstream ICs experience overstress, while low zener impedance (<1 Ω dynamic) maintains tight clamping under high di/dt transients.
The device is rated for 1500 W non-repetitive peak pulse power (10/1000 µs waveform), with thermal derating starting at 75°C junction temperature. Its SMC (Case 403) surface-mount package supports 260°C soldering and delivers 54.6°C/W junction-to-lead thermal resistance for reliable power dissipation in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 30.8 V - maximum continuous reverse voltage before leakage exceeds 5 µA; sets minimum system operating voltage margin |
| VBR @ IT=1 mA | 33–39 V - guaranteed avalanche initiation range; defines precise turn-on threshold for design validation |
| VC @ IPP=30 A | 49.9 V - clamped voltage during 10/1000 µs surge; determines maximum stress on protected circuitry |
| PPK | 1500 W @ 1 ms - peak surge energy handling capacity; validates compliance with IEC 61000-4-5 Level 4 |
| IR @ VRWM | <5 µA - minimal leakage at rated reverse voltage; avoids power loss in battery-backed or low-quiescent systems |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for direct interface protection in handheld and field-deployed equipment |
| UL Recognition | UL 497B QVGV2 - certified for isolated loop circuit protection in telecom and process control safety systems |
Pinout & Package
Package: SMC (Surface Mount Case 403), void-free thermosetting plastic with modified L-bend leads, cathode indicated by molded notch. Dimensions: 6.60–7.11 mm × 5.59–6.10 mm × 1.90–2.41 mm (L×W×H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current return path during clamping | Connected to system ground or low-side reference; must maintain low-inductance path to handle 30 A surge |
| Cathode | High-voltage input terminal | Connected to protected line (e.g., 24 V rail); polarity notch enables automated optical inspection and placement verification |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W Peak Pulse Power | Supports IEC 61000-4-5 4th-level surge immunity without external series impedance |
| <1 ns Response Time | Minimizes voltage overshoot before clamping engages, critical for protecting fast-switching MOSFET gates |
| UL 497B Recognition | Validates suitability for safety-critical isolated loop protection in medical and industrial control systems |
| Low Zener Impedance | Ensures stable clamping across temperature and aging; dynamic impedance <1 Ω per Figure 4 at 20 V |
| Surmetic™ Package Reliability | Void-free molding and corrosion-resistant finish enable >1000 thermal cycles and high-humidity operation |
Applications
| Automotive Power Supply Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS placed directly across power input to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: 49.9 V clamping voltage provides ≥20% margin above 24 V nominal rail, preventing latch-up in downstream PMICs. | Use Scenario: 24 V digital inputs in programmable logic controllers subjected to inductive kickback from solenoid loads. IC Role / Device Role / Timing Role: Unidirectional TVS connected between input line and common reference to absorb negative-going transients. Use Value: 30.8 V VRWM allows compatibility with standard 24 V industrial logic thresholds while blocking normal operating voltage. |
| Medical Equipment Isolated Interface | Telecom Line Card Surge Protection |
Use Scenario: Signal isolation barriers (e.g., optocouplers, digital isolators) in patient-connected devices requiring UL 497B compliance. IC Role / Device Role / Timing Role: Primary overvoltage protector on secondary side of isolated power/signal paths to meet creepage/clearance safety standards. Use Value: UL 497B QVGV2 recognition confirms qualification for Class I/II medical equipment isolated loop protection. | Use Scenario: Ethernet or RS-485 line cards in central office equipment facing lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-stage shunt suppressor on differential pair inputs, coordinated with GDT or MOV upstream. Use Value: 1500 W rating enables coordination with 5 kA gas discharge tubes without thermal runaway during multi-pulse events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | 600 W peak power, SMB package, same VRWM/VBR but lower IPP (16.7 A) | Lower surge capacity limits use to Class 2–3 IEC 61000-4-5 environments | Select when board space is constrained and surge threat level is moderate (e.g., consumer-grade peripherals) |
| 1.5KE36A | Through-hole DO-201 package, identical electrical specs but higher thermal resistance (75°C/W) | Requires larger PCB area and cannot support high-density SMT assembly | Select for legacy through-hole designs or where manual rework accessibility is prioritized over miniaturization |
Compared with SMBJ36A and 1.5KE36A, the 1.5SMC36AT3 delivers 2.5× higher surge power in an SMT footprint with superior thermal performance - making it optimal for next-generation automotive and industrial modules requiring both high reliability and space efficiency.
Availability
1.5SMC36AT3 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, medical isolation barriers, and telecom line card designs requiring stable component supply across extended production lifecycles.
Supply support for 1.5SMC36AT3 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, and cloud power applications.
The 1.5SMC36AT3 belongs to ON Semiconductor's SMC-series transient voltage suppressors - engineered specifically for high-energy surge immunity in surface-mount power rail and interface protection across harsh-environment applications.
FAQ
What is the clamping voltage of the 1.5SMC36AT3 at its rated peak pulse current?
The 1.5SMC36AT3 clamps to a maximum of 49.9 V at 30 A peak pulse current (10/1000 µs waveform), as specified in the Electrical Characteristics table on page 3 of the ON Semiconductor datasheet. This value defines the upper voltage limit imposed on protected circuitry during surge events and must be verified against the absolute maximum ratings of downstream components when designing for IEC 61000-4-5 compliance.
Is the 1.5SMC36AT3 suitable for bidirectional transient protection?
No, the 1.5SMC36AT3 is a unidirectional TVS diode, as explicitly stated in the datasheet header ("Unidirectional*") and confirmed by its single-polarity marking (cathode notch only). For bidirectional protection, ON Semiconductor offers separate part numbers such as 1.5SMC36CAT3 - the "C" suffix denotes bidirectional configuration, which is electrically and mechanically distinct from the 1.5SMC36AT3.
Does the 1.5SMC36AT3 have UL recognition for safety-critical applications?
Yes, the 1.5SMC36AT3 carries UL 497B recognition under file #116110 in the QVGV2 category for protectors, as documented on page 4 of the datasheet. This certification validates its use in isolated loop circuits for telecom, medical, and industrial control systems where failure could impact functional safety - distinct from basic flammability-only approvals held by some competitors.
What is the maximum operating temperature range for the 1.5SMC36AT3?
The 1.5SMC36AT3 is rated for an operating and storage temperature range of –65°C to +150°C, per the Maximum Ratings table on page 2 of the datasheet. Its thermal resistance from junction to lead is 54.6°C/W, enabling reliable operation at full 1500 W surge rating up to 75°C lead temperature, with linear derating above that point per Figure 3.
How does the SMC package of the 1.5SMC36AT3 compare to DO-214AB in mechanical dimensions?
The 1.5SMC36AT3 uses ON Semiconductor's proprietary SMC package (Case 403), measuring 6.60–7.11 mm × 5.59–6.10 mm × 1.90–2.41 mm - identical in outline to industry-standard DO-214AB per JEDEC MO-213. The datasheet confirms mechanical equivalence, allowing drop-in replacement in existing DO-214AB footprints without layout modification.
1.5SMC36AT3 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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 30A
- 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
1.5SMC36AT3 FAQ
1.How can I place an order for 1.5SMC36AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC36AT3 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 1.5SMC36AT3 reliable?
The price and inventory of 1.5SMC36AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC36AT3 is usually 5 days.
3.What payment methods are accepted for 1.5SMC36AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC36AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC36AT3?
1.5SMC36AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC36AT3 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 1.5SMC36AT3?
For technical support, including 1.5SMC36AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC36AT3 requirements.
6.How does Aetrix verify that 1.5SMC36AT3 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC36AT3 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 1.5SMC36AT3 meets industry standards.
7.What is the process for return or replacement of 1.5SMC36AT3?
All 1.5SMC36AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC36AT3, 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 1.5SMC36AT3 part is unused and in its original packaging.
Return procedure for 1.5SMC36AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC36AT3 Tags
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onsemi
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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