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Vishay General Semiconductor - Diodes Division 1.5SMC15A-E3/9AT
- Part No.:
- 1.5SMC15A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15A-E3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:878
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Product details
Overview
1.5SMC15A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 12.8 V standoff voltage (VWM), 14.3–15.8 V breakdown voltage (VBR) at 1 mA, 21.2 V maximum clamping voltage (VC) at 70.8 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - ideal for safeguarding MOSFETs and ICs against lightning-induced transients in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC15A-E3/9AT datasheet, 1.5SMC15A-E3/9AT pinout, 1.5SMC15A-E3/9AT application, or 1.5SMC15A-E3/9AT equivalent, this device delivers verified unidirectional clamping performance, RoHS-compliant SMC (DO-214AB) packaging, AEC-Q101 qualification readiness, and precise thermal derating data for high-reliability board-level surge protection design.
Technical Context
The 1.5SMC15A-E3/9AT operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transient overvoltages. Its unidirectional polarity uses a cathode band marking and exhibits low incremental surge resistance (typical <0.3 Ω) and excellent clamping ratio (VC/VBR ≈ 1.43), critical for minimizing let-through energy during ESD or inductive switching events.
Thermally, it is rated for -65 °C to +150 °C operating junction temperature, with RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, supporting stable operation under repetitive surge conditions up to 0.01% duty cycle. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12.8 V - Maximum continuous reverse voltage before significant leakage; sets safe operating margin below system rail. |
| VBR (Breakdown Voltage) | 14.3–15.8 V at 1 mA - Confirmed avalanche onset range; ensures predictable triggering above normal operating voltage. |
| VC (Clamping Voltage) | 21.2 V at 70.8 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; defines protection window. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy transients without failure; validated per IEC 61000-4-5 surge immunity testing. |
| IPPM (Peak Pulse Current) | 70.8 A - Maximum non-repetitive surge current handled; determines survivability against lightning or load dump. |
| TJ max. | +150 °C - Enables use in under-hood automotive or high-ambient industrial environments without thermal shutdown. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 3.2 mm min. cathode-to-anode distance; compatible with automated pick-and-place. |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD22-B102; cathode indicated by band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line. | Defines reference point for unidirectional clamping; must be tied to ground or return path in standard TVS configuration. |
| Cathode | Current exit terminal in forward bias; marked with band; reverse-biased during clamping. | Connected to protected line (e.g., 12 V rail); conducts avalanche current to ground when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV line-to-ground) surge testing without external series impedance. |
| Low clamping voltage (21.2 V @ 70.8 A) | Restricts overvoltage stress on downstream 16 V-rated MOSFETs or 24 V logic interfaces during transients. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without moisture-related popcorning or delamination. |
| AEC-Q101 qualification option (HE3 suffix) | Validates reliability for automotive powertrain and body electronics applications requiring zero-defect field performance. |
Applications
| Automotive Power Supply Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a, up to 60 V/100 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping surges within 1 ns. Use Value: Limits peak voltage to 21.2 V, preventing damage to 36 V-input buck controllers and ensuring uninterrupted microcontroller operation. |
Use Scenario: Shielding 24 V digital input modules from inductive kickback generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: Standoff-rated TVS on each input channel, absorbing repetitive 1500 W pulses without degradation. Use Value: Maintains <1 μA leakage at 12.8 V, preserving input logic thresholds while surviving >10,000 surge events per IEC 61000-4-4. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Safeguarding PoE-powered Ethernet switches against induced surges on 48 V DC power bus. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters, coordinated with MOVs for multi-stage protection. Use Value: Fast response and low VC prevent latch-up in PMICs and maintain IEEE 802.3af/at compliance under combined fast/slow transients. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals to shunt inductive energy into chassis ground. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), eliminating need for snubber RC networks and reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A-E3/52T (Vishay) | Same VWM/VBR/VC, but 600 W PPPM and SMB package (smaller footprint, higher RθJA = 90 °C/W). | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump. | Select when space-constrained PCB layout prioritizes size over surge margin and thermal mass. |
| 1.5KE15A (ON Semiconductor) | Through-hole DO-201 package; identical electrical specs but no AEC-Q101 option and higher mounting inductance. | Not suitable for high-frequency surge suppression or automated SMT production; requires wave soldering. | Choose only for legacy through-hole designs or prototyping where rework flexibility outweighs production efficiency. |
Compared with SMBJ15A-E3/52T and 1.5KE15A, the 1.5SMC15A-E3/9AT provides superior surge handling (1500 W vs. 600 W or 1500 W with inferior thermal coupling), standardized SMT compatibility, and direct path to AEC-Q101 qualification - making it optimal for volume automotive and industrial power interface designs demanding proven reliability and manufacturability.
Availability
1.5SMC15A-E3/9AT is available at Aetrix Electronics and suitable for automotive power supply protection, industrial PLC input conditioning, telecom DC feed protection, and consumer appliance motor control requiring stable component supply and full traceability.
Supply support for 1.5SMC15A-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, and protection devices engineered for high reliability and precision parametric performance.
The 1.5SMC Series was developed specifically for surface-mount transient suppression in harsh-environment applications - emphasizing high pulse power density, tight VBR tolerance, and automotive-grade process control.
FAQ
What is the clamping voltage of the 1.5SMC15A-E3/9AT under a 10/1000 μs surge?
The 1.5SMC15A-E3/9AT has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current of 70.8 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88303 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 24 V-rated components downstream of the 1.5SMC15A-E3/9AT.
Is the 1.5SMC15A-E3/9AT RoHS-compliant and halogen-free?
Yes, the 1.5SMC15A-E3/9AT carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., 1.5SMC15A-M3/9AT) must be selected. Both variants meet JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
Does the 1.5SMC15A-E3/9AT have AEC-Q101 qualification?
The base 1.5SMC15A-E3/9AT is commercial-grade and not AEC-Q101 qualified. However, Vishay offers the functionally identical 1.5SMC15AHE3_A variant (with HE3 suffix and revision code "A") that is fully AEC-Q101 qualified for automotive applications. The "HE3" designation confirms qualification to stress test requirements including HTOL, TCT, and ESD per AEC-Q101 Rev D.
What is the thermal resistance of the 1.5SMC15A-E3/9AT, and how does it affect layout?
The 1.5SMC15A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pad per terminal. This value assumes minimal PCB copper; reducing pad area increases RθJA and risks thermal runaway during repetitive surges. Layout must follow Vishay's DO-214AB pad dimensions (0.185" × 0.126") to ensure rated power dissipation and avoid premature failure of the 1.5SMC15A-E3/9AT.
How does the 1.5SMC15A-E3/9AT differ from bidirectional TVS diodes like 1.5SMC15CA?
The 1.5SMC15A-E3/9AT is unidirectional and features a cathode band for polarity-sensitive placement, whereas 1.5SMC15CA is bidirectional with symmetrical clamping in both directions and no polarity marking. Electrically, the 1.5SMC15A-E3/9AT has VWM = 12.8 V and VBR = 14.3–15.8 V, while 1.5SMC15CA specifies VWM = 12.8 V and VBR = ±14.3–15.8 V. Use the 1.5SMC15A-E3/9AT for DC rails with defined ground reference; choose the CA version only for AC-coupled or floating signal lines.
1.5SMC15A-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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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)
1.5SMC15A-E3/9AT FAQ
1.How can I place an order for 1.5SMC15A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15A-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 1.5SMC15A-E3/9AT reliable?
The price and inventory of 1.5SMC15A-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 1.5SMC15A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC15A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15A-E3/9AT?
1.5SMC15A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15A-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 1.5SMC15A-E3/9AT?
For technical support, including 1.5SMC15A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC15A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15A-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 1.5SMC15A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC15A-E3/9AT?
All 1.5SMC15A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15A-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 1.5SMC15A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC15A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC15A-E3/9AT Tags
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