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Vishay General Semiconductor - Diodes Division 1.5SMC36A-E3/9AT
- Part No.:
- 1.5SMC36A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC36A-E3/9AT.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,596
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Product details
Overview
1.5SMC36A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 36 V breakdown voltage (VBR = 34.2–37.8 V at 1 mA), 30.8 V stand-off voltage (VWM), and 49.9 V clamping voltage (VC) at 30.1 A peak pulse current - designed to protect power rails and signal lines in automotive and industrial control modules against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC36A-E3/9AT datasheet, 1.5SMC36A-E3/9AT pinout, 1.5SMC36A-E3/9AT application, or 1.5SMC36A-E3/9AT equivalent, this part delivers 1500 W peak pulse power (10/1000 µs), low incremental surge resistance, and AEC-Q101 qualification readiness via HE3 suffix variants - critical for ECU-level transient immunity validation and board-level ESD/surge co-design.
Technical Context
This unidirectional TVS operates with a glass-passivated junction and exhibits fast response time (<1 ns), enabling suppression of sub-microsecond transients before downstream ICs experience overstress. Its thermal resistance (RθJA = 75 °C/W) and 150 °C max junction temperature support sustained operation under repetitive surge conditions when mounted on 8.0 mm × 8.0 mm copper pads.
The device complies with UL 497B (QVGQ2 recognition) and meets JESD201 Class 2 whisker resistance. Polarity is marked by a cathode band; it conducts only in reverse bias above VBR, with forward surge rating IFSM = 200 A (8.3 ms half-sine), making it suitable for DC bus protection where polarity is fixed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V / 37.8 V at 1 mA test current - defines precise reverse conduction onset for accurate overvoltage threshold setting |
| VWM | 30.8 V - maximum continuous reverse operating voltage without significant leakage (<1 µA) |
| VC @ IPPM | 49.9 V at 30.1 A - clamping voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling capacity, enabling robust protection against IEC 61000-4-5 Level 4 surges |
| IPPM | 30.1 A - maximum non-repetitive peak pulse current supported under standard waveform |
| TJmax | +150 °C - enables reliable operation in under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
Pinout & Package
SMC (DO-214AB) package: surface-mount, molded plastic case with cathode band marking; terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102; MSL level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V supply rail); band-marked end absorbs transient energy into ground |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against high-energy surges per IEC 61000-4-5, reducing need for cascaded protection stages |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during clamping, preserving margin for 3.3 V/5 V/24 V logic and interface ICs |
| Glass-passivated junction | Ensures stable VBR and low leakage over temperature and lifetime, critical for long-term reliability in automotive ECUs |
| RoHS-compliant, halogen-free option available (M3 suffix) | Supports environmental compliance requirements for global OEMs and industrial equipment without performance trade-offs |
| AEC-Q101 qualification path (HE3/HM3) | Validates robustness for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 24 V battery-supplied engine control unit exposed to load-dump and jump-start transients up to ±100 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp reverse-polarity and surge events within nanoseconds. Use Value: Limits rail voltage to ≤49.9 V during 30.1 A surge, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: 4–20 mA current-loop sensor interface in factory automation subject to EFT bursts and cable-coupled noise. IC Role / Device Role / Timing Role: TVS installed across input terminals to shunt fast transients before they reach precision op-amps and ADC front-ends. Use Value: Clamps induced spikes below 50 V while maintaining <1 µA leakage at 30.8 V, preserving loop accuracy and zero-point stability. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: PoE-powered network switch with 48 V DC input susceptible to lightning-induced common-mode surges on Ethernet lines. IC Role / Device Role / Timing Role: Primary TVS on 48 V input rail upstream of DC/DC converter, coordinated with secondary protection on data lines. Use Value: Absorbs 1500 W surge energy without degradation, ensuring uninterrupted operation during outdoor installation surges. |
Use Scenario: Brushless DC motor controller in smart home appliance experiencing back-EMF spikes during commutation. IC Role / Device Role / Timing Role: TVS across H-bridge high-side MOSFET drain-source to suppress inductive kickback exceeding 60 V. Use Value: Fast turn-on (<1 ns) limits voltage overshoot to 49.9 V, preventing avalanche failure of 60 V-rated MOSFETs. |
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 (Diodes Inc.) | Same VBR range (34.2–37.8 V), but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load-dump | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports) |
| 1.5KE36A (ON Semiconductor) | Through-hole DO-201 package, identical electrical specs but higher RθJA (100 °C/W), no AEC-Q101 path | Not suitable for automated SMT assembly or high-reliability automotive use; requires wave soldering | Choose only for legacy through-hole designs or prototyping where rework tolerance outweighs production efficiency |
Compared with SMBJ36A and 1.5KE36A, the 1.5SMC36A-E3/9AT offers superior surge robustness (1500 W vs. 600 W/600 W), SMT compatibility, and direct path to AEC-Q101 qualification - making it the preferred choice for volume automotive and industrial power rail protection where reliability and manufacturability are jointly prioritized.
Availability
1.5SMC36A-E3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial PLC I/O modules, telecom power supplies, and consumer appliance motor drives requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC36A-E3/9AT 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, repeatable clamping, and AEC-Q101 readiness are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC36A-E3/9AT under a 10/1000 µs surge?
The 1.5SMC36A-E3/9AT has a maximum clamping voltage (VC) of 49.9 V at 30.1 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and reflects worst-case device behavior at TA = 25 °C with recommended PCB pad layout (8.0 mm × 8.0 mm copper). The 1.5SMC36A-E3/9AT maintains this clamping performance across its qualified operating temperature range.
Is the 1.5SMC36A-E3/9AT RoHS-compliant and halogen-free?
Yes, the 1.5SMC36A-E3/9AT carries the "E3" suffix, indicating it is RoHS-compliant per EU Directive 2011/65/EU and meets Vishay's commercial-grade material specifications. It is not halogen-free; for halogen-free compliance, select the "M3" variant (e.g., 1.5SMC36A-M3/9AT). Both E3 and M3 versions satisfy JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
Does the 1.5SMC36A-E3/9AT have AEC-Q101 qualification?
The 1.5SMC36A-E3/9AT itself is not AEC-Q101 qualified; however, Vishay offers AEC-Q101-qualified versions in the same family using the "HE3" suffix (e.g., 1.5SMC36AHE3_A/I). The 1.5SMC36A-E3/9AT shares identical electrical and thermal characteristics with those qualified parts and is manufactured on the same qualified process - making it suitable for pre-qualification design-in and functional testing prior to final AEC-Q101 release.
What is the thermal resistance of the 1.5SMC36A-E3/9AT, and how does it affect layout?
The 1.5SMC36A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value assumes no additional heatsinking. To maintain TJ ≤ 150 °C during repetitive surge events, PCB layout must provide adequate copper area and avoid thermal bottlenecks - undersized pads will raise RθJA and risk thermal runaway during high-duty-cycle transients.
How does the 1.5SMC36A-E3/9AT differ from bidirectional variants like 1.5SMC36CA?
The 1.5SMC36A-E3/9AT is unidirectional and features a cathode band for polarity identification; it conducts only in reverse bias above VBR. In contrast, 1.5SMC36CA is bidirectional with symmetric clamping in both directions and no polarity marking. The 1.5SMC36A-E3/9AT is used where circuit polarity is fixed (e.g., +24 V rail to ground), while 1.5SMC36CA suits AC lines or differential buses like RS-485. Their VBR, VC, and PPPM are identical, but leakage and capacitance differ slightly due to internal structure.
1.5SMC36A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 30.1A
- 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:
- DO-214AB (SMCJ)
1.5SMC36A-E3/9AT FAQ
1.How can I place an order for 1.5SMC36A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC36A-E3/9AT 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 1.5SMC36A-E3/9AT reliable?
The price and inventory of 1.5SMC36A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC36A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC36A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC36A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC36A-E3/9AT?
1.5SMC36A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC36A-E3/9AT 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 1.5SMC36A-E3/9AT?
For technical support, including 1.5SMC36A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC36A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC36A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC36A-E3/9AT 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 1.5SMC36A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC36A-E3/9AT?
All 1.5SMC36A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC36A-E3/9AT, 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 1.5SMC36A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC36A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC36A-E3/9AT Tags
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