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Vishay General Semiconductor - Diodes Division 1.5SMC30A-E3/9AT
- Part No.:
- 1.5SMC30A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30A-E3/9AT.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,712
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Product details
Overview
1.5SMC30A-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 30 V breakdown voltage (VBR = 28.5–31.5 V at 1 mA), 25.6 V stand-off voltage (VWM), clamps to ≤41.4 V at 36.2 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC30A-E3/9AT datasheet, 1.5SMC30A-E3/9AT pinout, 1.5SMC30A-E3/9AT application, or 1.5SMC30A-E3/9AT equivalent, this RoHS-compliant, commercial-grade SMC (DO-214AB) package device offers verified clamping performance, low incremental surge resistance, MSL Level 1 moisture sensitivity, and AEC-Q101 qualification readiness - critical for automotive ECU, industrial I/O, and telecom line-card designs requiring repeatable surge immunity.
Technical Context
The 1.5SMC30A-E3/9AT operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns), enabling effective suppression of sub-microsecond transients. The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine) and maintains thermal stability up to TJ = 150 °C.
Mounted on 8.0 mm × 8.0 mm copper pads per terminal, it achieves RθJA = 75 °C/W and RθJL = 15 °C/W. Its cathode band marking identifies polarity, and it complies with JESD201 Class 2 whisker resistance and UL 94 V-0 flammability standards - confirming suitability for automated SMT assembly and high-reliability PCB environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 28.5 V / 31.5 V at IT = 1 mA - defines precise avalanche onset window for predictable clamping initiation |
| VWM | 25.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | ≤41.4 V at 36.2 A - peak clamped voltage during 1500 W 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling capability under standardized surge waveform, validated per Fig. 1 |
| IFSM | 200 A - single half-sine surge rating (8.3 ms), supporting high-energy inductive load switching events |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood automotive or industrial ambient conditions |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 8.13 mm × 6.22 mm × 2.62 mm (L × W × H); mounting pad layout per Vishay spec requires 8.0 mm × 8.0 mm copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (cathode-biased during surge) | Connected to protected circuit's ground or low-side reference; carries full surge current during clamping |
| Cathode | Avalanche breakdown node (marked with band) | Connected to line being protected; reverse-biased during normal operation, avalanches at VBR to shunt surge energy |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating in standard layouts |
| Glass-passivated chip junction | Ensures long-term VBR stability and low leakage drift across temperature and lifetime |
| MSL Level 1 (260 °C peak reflow) | Supports lead-free reflow soldering without preconditioning or special handling |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
| AEC-Q101 qualification option (HE3 suffix) | Validates reliability for automotive applications including engine control, body electronics, and ADAS sensors |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 25.6 V. Use Value: Limits peak voltage to ≤41.4 V during 36.2 A transients, preventing damage to 36 V-rated DC-DC controllers and CAN transceivers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal lines to absorb ESD and cable discharge events. Use Value: Sub-1 ns response and ≤1 µA leakage at 25.6 V preserve signal integrity while meeting IEC 61000-4-2 ±8 kV contact discharge requirements. |
| Telecom DSL Line Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding ADSL/VDSL line drivers from lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Primary surge clamp on tip/ring lines upstream of isolation transformers and line interface ICs. Use Value: 1500 W rating handles 10/1000 µs induced surges per ITU-T K.20/K.21, maintaining <1% distortion below VWM. |
Use Scenario: Secondary-side overvoltage protection in AC-DC adapters for smart home devices. IC Role / Device Role / Timing Role: Standoff-rated TVS across 24 V output rails to prevent latch-up during output short-circuit recovery. Use Value: 25.6 V VWM allows safe operation with 24 V ±10% regulation, while 41.4 V clamping protects 30 V-rated MOSFETs and optocouplers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A-E3/52T (Vishay) | Same VBR/VWM/VC, but lower PPPM = 600 W and SMB (DO-214AA) package (smaller footprint, higher RθJA) | Preferred for space-constrained consumer PCBs where 600 W surge margin suffices; not suitable for 1500 W IEC 61000-4-5 compliance | Select when board area is limited and surge energy is ≤600 W; verify thermal derating for sustained pulse repetition. |
| 1.5KE30A (ON Semiconductor) | Through-hole TO-204AE (DO-201AE) package; identical electrical specs but incompatible mounting and higher RθJA (100 °C/W) | Used in legacy industrial power supplies where through-hole assembly remains standard; requires PCB redesign for SMT migration | Choose only for through-hole retrofits or prototyping; avoid for new SMT designs due to placement and thermal limitations. |
Compared with SMBJ30A-E3/52T and 1.5KE30A, the 1.5SMC30A-E3/9AT uniquely balances 1500 W surge capacity, SMC package manufacturability, and thermal performance (RθJA = 75 °C/W), making it optimal for high-volume automotive and industrial SMT production where both robustness and process compatibility are required.
Availability
1.5SMC30A-E3/9AT is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom line-card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC30A-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 power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems where compact size, repeatable clamping, and AEC-Q101 qualification readiness are essential design requirements.
FAQ
What is the maximum clamping voltage of the 1.5SMC30A-E3/9AT under a 10/1000 µs surge?
The 1.5SMC30A-E3/9AT clamps to a maximum of 41.4 V when subjected to its rated peak pulse current of 36.2 A using the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Document Number: 88303) and represents the upper limit of voltage seen by downstream circuitry during surge events - critical for ensuring compatibility with 36 V-rated components.
Is the 1.5SMC30A-E3/9AT RoHS-compliant and halogen-free?
Yes, the 1.5SMC30A-E3/9AT carries the "E3" suffix, indicating it is RoHS-compliant and manufactured to commercial-grade specifications. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., 1.5SMC30A-M3/9AT) must be selected, as confirmed in the Ordering Information table on page 3 of the Vishay 88303 datasheet.
Does the 1.5SMC30A-E3/9AT have AEC-Q101 qualification?
The 1.5SMC30A-E3/9AT itself is not AEC-Q101 qualified; however, the "HE3" automotive-grade variant (e.g., 1.5SMC30AHE3_A/I) is explicitly qualified per AEC-Q101. Per datasheet footnote (1), the _A suffix is available for AEC-Q101 qualification across the 6.8 V to 220 V range - so 1.5SMC30A-E3/9AT serves as the commercial baseline, while HE3 versions meet automotive stress test requirements.
What is the thermal resistance junction-to-ambient for the 1.5SMC30A-E3/9AT?
The 1.5SMC30A-E3/9AT has a typical thermal resistance of RθJA = 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pads per terminal, as specified in the Thermal Characteristics table (page 3) of the Vishay 88303 datasheet. This value assumes no additional heatsinking and is essential for calculating junction temperature rise under continuous power dissipation.
How does the 1.5SMC30A-E3/9AT differ from bidirectional variants like 1.5SMC30CA?
The 1.5SMC30A-E3/9AT is unidirectional and features a cathode band marking; it conducts only in reverse bias above VBR. In contrast, 1.5SMC30CA is bidirectional - symmetrical in both directions, with no polarity marking - and intended for AC line or differential signal protection. Their VBR, VWM, and VC values differ: 1.5SMC30A has VWM = 25.6 V, while 1.5SMC30CA has VWM = 25.6 V in each direction but different breakdown symmetry.
1.5SMC30A-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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36.2A
- 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)
1.5SMC30A-E3/9AT FAQ
1.How can I place an order for 1.5SMC30A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30A-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 1.5SMC30A-E3/9AT reliable?
The price and inventory of 1.5SMC30A-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 1.5SMC30A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC30A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30A-E3/9AT?
1.5SMC30A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30A-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 1.5SMC30A-E3/9AT?
For technical support, including 1.5SMC30A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC30A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30A-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 1.5SMC30A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC30A-E3/9AT?
All 1.5SMC30A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30A-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 1.5SMC30A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC30A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30A-E3/9AT Tags
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