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Vishay General Semiconductor - Diodes Division 1.5SMC33A-E3/57T
- Part No.:
- 1.5SMC33A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33A-E3/57T.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:840
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Product details
Overview
1.5SMC33A-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 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V stand-off voltage (VWM), clamps to ≤45.7 V at 32.8 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used in automotive power supply rail protection.
For engineers reviewing the 1.5SMC33A-E3/57T datasheet, 1.5SMC33A-E3/57T pinout, 1.5SMC33A-E3/57T application, or 1.5SMC33A-E3/57T equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under IEC 61000-4-5 surge conditions, and AEC-Q101 qualification readiness via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (28.2 V), it avalanches near VBR (31.4–34.7 V) and limits transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response (<1 ns).
Thermally, it sustains 150 °C maximum junction temperature with RθJA = 75 °C/W (on 8 mm × 8 mm copper pads) and handles 200 A non-repetitive forward surge (8.3 ms half-sine). The SMC package supports automated placement and meets MSL Level 1 (260 °C reflow peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | ≤45.7 V at 32.8 A - clamping voltage during 1500 W surge, ensuring downstream ICs see safe voltage stress |
| PPPM | 1500 W (10/1000 µs) - peak surge handling capacity compliant with IEC 61000-4-5 Level 4 |
| IFSM | 200 A (8.3 ms half-sine) - withstands high-energy inrush or load-dump events without failure |
| Junction Temp | -65 °C to +150 °C - enables operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by band on body; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line's low-side or ground return path | Provides low-impedance surge shunt path to ground when device triggers in reverse breakdown |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line's high-side or supply rail | Defines polarity-sensitive connection - incorrect orientation disables protection and risks short-circuit failure |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against severe transients per IEC 61000-4-5 (4 kV/2 Ω) |
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %), low leakage (<1 µA), and long-term reliability under thermal cycling |
| MSL Level 1 rating | Supports standard lead-free reflow (260 °C peak) without preconditioning or dry-pack requirements |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and industrial surge protection systems requiring safety agency approval |
| RoHS-compliant (E3 suffix) | Meets global environmental compliance for commercial-grade automotive and industrial PCB assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump (ISO 16750-2) and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between supply rail and chassis ground. Use Value: Clamps 120 V/100 ms load dump to ≤45.7 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance TVS on 4–20 mA current loop output lines. Use Value: Limits induced lightning-induced transients (IEC 61000-4-5) to sub-50 V, preserving ADC input integrity and calibration stability. |
| Telecom Interface Port Protection | Consumer Power Adapter Input Stage |
Use Scenario: Shielding Ethernet PHY power pins (e.g., PoE midspan injectors) from ESD and surge coupling. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input before DC-DC regulation. Use Value: Absorbs 1500 W surges without degradation, maintaining UL 497B system-level certification for telecom infrastructure. |
Use Scenario: Input-stage transient suppression in universal-input AC/DC adapters for smart home hubs. IC Role / Device Role / Timing Role: Secondary-side TVS on 12 V output rail protecting USB-C PD controllers. Use Value: Prevents latch-up in USB interface ICs during hot-plug events by clamping to <46 V within nanoseconds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 | Lower PPPM (600 W), same VBR/VWM, SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer electronics where 600 W surge margin suffices | Select when board area is critical and full 1500 W capability is not required. |
| 1.5KE33A-T | Through-hole DO-201 package, identical electrical specs but incompatible mounting and thermal profile | Used in legacy industrial power supplies where manual assembly or high-reliability through-hole construction is mandated | Choose only if existing PCB layout or qualification requires axial-leaded form factor. |
Compared with SMBJ33A-E3/52 and 1.5KE33A-T, the 1.5SMC33A-E3/57T uniquely balances high-power SMT capability (1500 W), standardized SMC footprint, and RoHS-compliant commercial qualification - making it optimal for new automotive and industrial designs requiring automated assembly and IEC 61000-4-5 compliance.
Availability
1.5SMC33A-E3/57T is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial sensor interfaces, telecom port protection, and consumer power adapter designs requiring stable component supply across production lifecycles.
Supply support for 1.5SMC33A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 readiness, and standardized SMT packaging are essential.
FAQ
What is the clamping voltage of the 1.5SMC33A-E3/57T under maximum surge conditions?
The 1.5SMC33A-E3/57T clamps to a maximum of 45.7 V when subjected to its rated 32.8 A peak pulse current (10/1000 µs waveform). This value is measured at the device terminals under standard test conditions (TA = 25 °C, mounted on 8 mm × 8 mm copper pads) and represents the upper limit of voltage seen by protected circuitry during a full 1500 W transient event. Designers must ensure downstream components tolerate this clamping level.
Is the 1.5SMC33A-E3/57T suitable for automotive applications?
Yes - while the 1.5SMC33A-E3/57T itself carries the commercial-grade E3 suffix, it belongs to the AEC-Q101-qualified 1.5SMC family. Automotive-grade variants (e.g., 1.5SMC33AHE3_A) use the same die and SMC package but add traceability, extended testing, and qualification documentation. The 1.5SMC33A-E3/57T is widely deployed in non-safety-critical automotive subsystems such as infotainment power rails and body control modules where its 1500 W surge rating meets ISO 16750-2 requirements.
How does the 1.5SMC33A-E3/57T differ from bidirectional TVS diodes like 1.5SMC33CA?
The 1.5SMC33A-E3/57T is unidirectional and functions only during reverse-biased overvoltage events - it conducts like a rectifier in forward bias. In contrast, 1.5SMC33CA provides symmetrical clamping for AC-coupled or floating lines (e.g., data buses), suppressing surges in both polarities. The 1.5SMC33A-E3/57T offers lower leakage (<1 µA at 28.2 V) and is preferred for DC power rail protection, whereas the CA version suits RS-485 or CAN bus lines where polarity reversal may occur.
What is the thermal resistance of the 1.5SMC33A-E3/57T, and how does it affect layout?
The 1.5SMC33A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8 mm × 8 mm copper pads per terminal. This means a 1 W steady-state dissipation raises junction temperature by ~75 °C above ambient. For reliable operation near its 150 °C TJMAX, designers must limit average power (PD = 6.5 W) and ensure adequate copper area - reducing pad size increases RθJA and risks thermal runaway during repetitive surges.
Can the 1.5SMC33A-E3/57T be used in place of older DO-15 or DO-201 packages?
No - the 1.5SMC33A-E3/57T uses the SMC (DO-214AB) surface-mount package, which is physically incompatible with through-hole DO-15 or DO-201 footprints. While electrical characteristics (VBR, VC, PPPM) may overlap with parts like 1.5KE33A (DO-201), the 1.5SMC33A-E3/57T requires re-layout for SMT assembly, including solder mask defined pads and stencil aperture design per IPC-7351. Direct substitution without board revision is not feasible.
1.5SMC33A-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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- 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)
1.5SMC33A-E3/57T FAQ
1.How can I place an order for 1.5SMC33A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33A-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 1.5SMC33A-E3/57T reliable?
The price and inventory of 1.5SMC33A-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 1.5SMC33A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC33A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33A-E3/57T?
1.5SMC33A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33A-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 1.5SMC33A-E3/57T?
For technical support, including 1.5SMC33A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC33A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33A-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 1.5SMC33A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC33A-E3/57T?
All 1.5SMC33A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33A-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 1.5SMC33A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC33A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33A-E3/57T Tags
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Diodes Incorporated
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Diodes Incorporated
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