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Vishay General Semiconductor - Diodes Division 1.5SMC33CA-E3/57T
- Part No.:
- 1.5SMC33CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33CA-E3/57T.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
1.5SMC33CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 33 V standoff voltage (VWM), 36.8 V minimum breakdown voltage (VBR), 45.7 V maximum clamping voltage (VC) at 32.8 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed across automotive sensor lines, industrial I/O ports, and telecom interface circuits.
For engineers reviewing the 1.5SMC33CA-E3/57T datasheet, 1.5SMC33CA-E3/57T pinout, 1.5SMC33CA-E3/57T application, or 1.5SMC33CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 moisture sensitivity, RoHS-compliant matte tin terminations, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This device operates as a voltage-clamped shunt protector: under transient overvoltage events exceeding its breakdown threshold, it rapidly switches to low-impedance conduction, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while bidirectional symmetry enables protection on AC-coupled or floating signal paths without polarity constraints.
The 1.5SMC33CA-E3/57T sustains repetitive 10/1000 μs surges at 0.01% duty cycle and derates linearly above 25 °C ambient per Fig. 2. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), requiring minimum 8.0 mm × 8.0 mm copper pads per terminal for rated PPPM performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC RMS working limit. |
| VBR (Breakdown) | 36.8 V min - Voltage at which device begins avalanche conduction at 1 mA test current; sets precise turn-on threshold. |
| VC (Clamping) | 45.7 V max at 32.8 A - Peak voltage seen by protected circuit during full-rated 10/1000 μs surge; determines stress on downstream ICs. |
| PPPM | 1500 W - Peak transient energy absorption capability; validates robustness against lightning-induced or inductive-switching surges. |
| ID (Leakage) | 1.0 μA max at 33 V - Low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or enclosed industrial environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminals function identically as anode/cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal conducts during positive or negative transients; no fixed polarity - enables placement on AC or floating lines without orientation check. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamp path across protected node and ground or reference rail. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR and VC performance for ± polarity transients - eliminates need for dual unidirectional devices or polarity-aware layout. |
| 1500 W peak pulse power | Validated with 10/1000 μs waveform at 0.01% duty cycle - meets IEC 61000-4-5 Level 4 surge immunity requirements. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/85% RH - supports standard SMT reflow without baking or dry-pack handling. |
| Glass-passivated junction | Stable VBR tolerance and low leakage over temperature and lifetime - critical for long-term reliability in automotive ECUs. |
| RoHS-compliant matte tin leads | Solderable per J-STD-002/JESD 22-B102 - ensures consistent wetting and intermetallic formation in lead-free reflow profiles. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role: Bidirectional shunt clamp placed between signal line and chassis ground, limiting voltage excursion to ≤45.7 V during 1500 W surges. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V automotive-grade microcontrollers and analog front-ends without adding series impedance. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role: Parallel-connected TVS on each isolated input channel, clamping transients before optocoupler or Schmitt-trigger input stage. Use Value: Enables >100,000 surge cycles per channel with no parameter drift, meeting IEC 61000-4-4 EFT and IEC 61000-4-5 surge immunity standards. |
| Telecom Line Interface | Consumer USB/Display Port ESD |
Use Scenario: Shielding RS-485/RS-422 differential pairs in base station backhaul equipment from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role: Paired 1.5SMC33CA-E3/57T devices (one per line) referenced to local ground, providing symmetric common-mode clamping. Use Value: Maintains signal integrity up to 10 Mbps while surviving repeated 4 kV/2 kA surges - validated per Telcordia GR-1089-CORE. |
Use Scenario: Board-level ESD protection on HDMI, DisplayPort, or USB 2.0 data lanes in set-top boxes and monitors exposed to human-body-model (HBM) discharges. IC Role / Device Role: Low-capacitance TVS (CJ ≈ 100 pF at 0 V) placed directly at connector, shunting ESD pulses before reaching serializer/deserializer ICs. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without signal degradation or bit errors at 2.5 Gbps link speeds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower PPPM (600 W), same VWM/VC, SMB (DO-214AA) package - 30% smaller footprint, higher thermal resistance (100 °C/W). | Preferred for space-constrained consumer PCBs where surge threat level is ≤600 W; unsuitable for automotive load-dump compliance. | Select when board area is critical and surge energy is limited to IEC 61000-4-5 Level 2. |
| 1.5KE33CA | Same electrical specs but axial-leaded DO-15 package - requires through-hole mounting, no MSL rating, higher parasitic inductance. | Used in legacy industrial power supplies or prototyping; incompatible with automated SMT assembly and high-frequency surge suppression. | Choose only for hand-soldered repairs or non-production evaluation; avoid for new SMT designs. |
Compared with SMBJ33CA and 1.5KE33CA, the 1.5SMC33CA-E3/57T delivers 2.5× higher surge power in an MSL Level 1 SMT package, enabling single-device compliance with automotive and industrial surge standards without layout compromise or thermal derating penalties.
Availability
1.5SMC33CA-E3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O modules, telecom line interface protection, and consumer display interface hardening requiring stable component supply and full traceability.
Supply support for 1.5SMC33CA-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 passive components with emphasis on reliability, power efficiency, and automotive qualification.
The 1.5SMC Series targets high-energy transient suppression in harsh environments - engineered for AEC-Q101 readiness, industrial surge immunity, and seamless integration into automated SMT manufacturing flows.
FAQ
What is the clamping voltage of the 1.5SMC33CA-E3/57T at its rated peak pulse current?
The 1.5SMC33CA-E3/57T has a maximum clamping voltage (VC) of 45.7 V at its rated peak pulse current (IPPM) of 32.8 A, measured with a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The 1.5SMC33CA-E3/57T maintains this clamping performance due to its low incremental surge resistance and stable avalanche characteristics.
Is the 1.5SMC33CA-E3/57T suitable for automotive applications?
Yes - the 1.5SMC33CA-E3/57T is RoHS-compliant and part of the AEC-Q101-qualified 1.5SMC family (via HE3/HM3 variants). While the -E3/57T suffix denotes commercial-grade qualification, its construction - glass-passivated junction, 150 °C TJ max, MSL Level 1, and 1500 W surge rating - meets core automotive transient requirements including ISO 7637-2 pulse 5a (load dump). For certified AEC-Q101 use, specify 1.5SMC33CAHE3_A or 1.5SMC33CAHM3_A.
How does the bidirectional configuration of the 1.5SMC33CA-E3/57T affect circuit layout?
The 1.5SMC33CA-E3/57T has no polarity marking and functions identically in either orientation, simplifying PCB layout for AC-coupled, differential, or floating signal lines. Unlike unidirectional TVS diodes, it eliminates orientation verification during assembly and avoids risk of reverse-bias failure in bidirectional interfaces like RS-485 or CAN. This symmetry also allows single-part stocking for both polarities, reducing BOM complexity. The 1.5SMC33CA-E3/57T achieves this via symmetrical P-N junction structure, not back-to-back die.
What is the thermal derating behavior of the 1.5SMC33CA-E3/57T above 25 °C ambient?
The 1.5SMC33CA-E3/57T derates linearly above 25 °C ambient per Figure 2 in the Vishay datasheet (Doc. #88303): peak pulse power drops to 50% at +100 °C junction temperature and reaches zero at +150 °C. At 75 °C ambient with recommended 8.0 mm × 8.0 mm copper pads, the device retains ~75% of its 1500 W rating. Derating is governed by RθJA = 75 °C/W; actual junction temperature must stay ≤150 °C to avoid permanent degradation. The 1.5SMC33CA-E3/57T's RθJL = 15 °C/W further supports localized heat sinking via PCB copper.
Does the 1.5SMC33CA-E3/57T meet industry surge immunity standards?
Yes - the 1.5SMC33CA-E3/57T's 1500 W peak pulse power with 10/1000 μs waveform satisfies IEC 61000-4-5 Level 4 (4 kV line-to-ground, 2 kA) when applied with proper PCB layout (minimum 8.0 mm × 8.0 mm copper pads per terminal). It also supports IEC 61000-4-4 EFT (electrical fast transient) immunity and Telcordia GR-1089-CORE for telecom equipment. Compliance is verified per Vishay's characterization data in Document 88303; system-level validation remains the designer's responsibility.
1.5SMC33CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC33CA-E3/57T FAQ
1.How can I place an order for 1.5SMC33CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33CA-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 1.5SMC33CA-E3/57T reliable?
The price and inventory of 1.5SMC33CA-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 1.5SMC33CA-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC33CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33CA-E3/57T?
1.5SMC33CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33CA-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 1.5SMC33CA-E3/57T?
For technical support, including 1.5SMC33CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC33CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33CA-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 1.5SMC33CA-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC33CA-E3/57T?
All 1.5SMC33CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33CA-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 1.5SMC33CA-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC33CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33CA-E3/57T Tags
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