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Vishay General Semiconductor - Diodes Division 1.5SMC30A-E3/57T
- Part No.:
- 1.5SMC30A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30A-E3/57T.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,091
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Product details
Overview
1.5SMC30A-E3/57T 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 1.0 mA), 25.6 V stand-off voltage (VWM), clamps transients to ≤41.4 V at 36.2 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching spikes.
For engineers reviewing the 1.5SMC30A-E3/57T datasheet, 1.5SMC30A-E3/57T pinout, 1.5SMC30A-E3/57T application, or 1.5SMC30A-E3/57T equivalent, key selection criteria include its unidirectional polarity, SMC (DO-214AB) package with cathode band marking, 150 °C max junction temperature, MSL Level 1 rating, and RoHS-compliant matte tin-plated terminals suitable for automated placement and J-STD-002 soldering.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (25.6 V) and rapidly avalanches above VBR (28.5–31.5 V) to limit transient voltages. Its low incremental surge resistance and fast response time ensure effective suppression of sub-microsecond transients.
Designed for unidirectional operation, it conducts only in reverse bias during overvoltage events and blocks forward current up to 3.5 V at 100 A (forward voltage not rated for continuous conduction). Thermal performance is characterized by RθJA = 75 °C/W and RθJL = 15 °C/W, with derating applied above 25 °C ambient per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 28.5 V / 31.5 V at 1.0 mA - defines precise avalanche initiation threshold for reliable clamping onset |
| VWM | 25.6 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | ≤41.4 V at 36.2 A (10/1000 µs) - peak clamped voltage seen by protected circuit under worst-case surge |
| PPPM | 1500 W - peak transient power handling capability with 0.01% duty cycle, enabling single-event surge survival |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during fault conditions |
| TJ max | +150 °C - maximum junction temperature supporting operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design requirement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102; cathode indicated by a band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or lower-potential rail; establishes polarity-dependent clamping direction |
| Cathode | Avalanche conduction terminal | Marked with band; connected to line being protected; conducts reverse current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients such as ISO 7637-2 Pulse 1/2a/5a without degradation |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets environmental compliance for global electronics manufacturing without halogen restrictions |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role: Unidirectional TVS placed between power rail and ground to clamp positive-going surges. Use Value: Withstands 1500 W pulses and clamps to ≤41.4 V, keeping downstream DC-DC converters and microcontrollers within safe operating limits. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role: Low-capacitance TVS on signal line to ground, minimizing signal distortion while suppressing ±8 kV contact ESD. Use Value: Fast response and low leakage (<1 µA at 25.6 V) preserve signal integrity and prevent false triggering in precision measurement circuits. |
| Telecom DC Power Input Protection | Consumer Device USB/Power Port Protection |
|
Use Scenario: Safeguarding PoE-powered equipment inputs against induced surges from nearby lightning strikes. IC Role / Device Role: Primary-level TVS on 48 V input rail, coordinated with secondary-stage protection. Use Value: High peak power rating and 150 °C TJ rating allow sustained operation in enclosed telecom cabinets with elevated ambient temperatures. |
Use Scenario: Protecting USB-C power delivery inputs in laptops and docking stations from hot-plug transients and reverse polarity faults. IC Role / Device Role: Unidirectional suppressor on VBUS line to absorb 10/1000 µs surges up to 36.2 A. Use Value: Compact SMC package enables placement near connectors; RoHS/E3 compliance supports global consumer product certifications. |
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-E3/52 | Lower peak power (600 W), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Suitable for lower-energy transients; less robust for automotive load dump | Select when space-constrained and surge energy is limited to <600 W |
| 1.5KE30A | Through-hole DO-201 package; same VBR/VC specs but higher mounting thermal resistance | Used where manual assembly or legacy board designs require axial/lead-based components | Choose for prototyping, repair, or non-SMT production environments |
Compared with 1.5SMC30A-E3/57T, SMBJ30A-E3/52 offers smaller size but reduced surge capacity, while 1.5KE30A provides identical electrical performance in a through-hole format - making the 1.5SMC30A-E3/57T optimal for high-reliability SMT applications demanding 1500 W clamping in automotive and industrial settings.
Availability
1.5SMC30A-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, telecom DC input protection, and consumer USB-C power port hardening requiring stable component supply and full traceability.
Supply support for 1.5SMC30A-E3/57T 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed for high-power surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, high surge immunity, and AEC-Q101 qualification are critical.
FAQ
What is the maximum clamping voltage of the 1.5SMC30A-E3/57T under a 10/1000 µs surge?
The 1.5SMC30A-E3/57T clamps to a maximum of 41.4 V when subjected to its rated peak pulse current of 36.2 A with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads), and represents the highest voltage the protected circuit will experience during such a transient event. The 1.5SMC30A-E3/57T achieves this with low incremental surge resistance, ensuring minimal voltage overshoot beyond its breakdown region.
Is the 1.5SMC30A-E3/57T RoHS-compliant and lead-free?
Yes, the 1.5SMC30A-E3/57T carries the "E3" suffix, indicating full RoHS compliance and lead-free construction per EU Directive 2011/65/EU. Its matte tin-plated terminals meet J-STD-002 solderability requirements and JESD 201 Class 2 whisker resistance standards. The 1.5SMC30A-E3/57T is certified for use in commercial-grade applications and supports lead-free reflow profiles up to 260 °C peak temperature (MSL Level 1).
How does the 1.5SMC30A-E3/57T differ from bidirectional variants like 1.5SMC30CA?
The 1.5SMC30A-E3/57T is unidirectional and features a cathode band for polarity-sensitive placement, conducting only during reverse-biased overvoltage events. In contrast, 1.5SMC30CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The 1.5SMC30A-E3/57T has a lower VWM (25.6 V vs. 25.6 V for CA), identical VBR, and same PPPM, but cannot protect AC-coupled or floating signal lines where bidirectional suppression is required.
What is the thermal resistance and derating behavior of the 1.5SMC30A-E3/57T?
The 1.5SMC30A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads (RθJL) of 15 °C/W when mounted per recommended 8.0 mm × 8.0 mm copper pads. Its peak pulse power must be derated linearly above 25 °C ambient, dropping to ~75% at +100 °C per Figure 2 in the datasheet. This derating ensures safe operation in high-temperature enclosures where the 1.5SMC30A-E3/57T maintains clamping integrity up to TJ = 150 °C.
Can the 1.5SMC30A-E3/57T be used in automotive applications?
The base 1.5SMC30A-E3/57T is commercial-grade and not AEC-Q101 qualified; however, Vishay offers AEC-Q101 versions under ordering codes like 1.5SMC30AHE3_A/H. For automotive use requiring qualification, the 1.5SMC30A-E3/57T should be replaced with its HE3-suffixed variant. The 1.5SMC30A-E3/57T itself is widely deployed in non-qualified automotive subsystems (e.g., infotainment power rails) where its 1500 W surge rating and 150 °C TJ max provide margin, but formal qualification requires the HE3 part.
1.5SMC30A-E3/57T 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-E3/57T FAQ
1.How can I place an order for 1.5SMC30A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30A-E3/57T 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-E3/57T reliable?
The price and inventory of 1.5SMC30A-E3/57T 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-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC30A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30A-E3/57T?
1.5SMC30A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30A-E3/57T 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-E3/57T?
For technical support, including 1.5SMC30A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC30A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30A-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC30A-E3/57T?
All 1.5SMC30A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30A-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC30A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30A-E3/57T Tags
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