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Vishay General Semiconductor - Diodes Division 1.5SMC33CAHE3_A/I
- Part No.:
- 1.5SMC33CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33CAHE3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,547
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Product details
Overview
1.5SMC33CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 33 V standoff voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 μs), and clamping voltage of 45.7 V at 32.8 A. It protects automotive-grade signal lines and power rails against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5SMC33CAHE3_A/I datasheet, 1.5SMC33CAHE3_A/I pinout, 1.5SMC33CAHE3_A/I application, or 1.5SMC33CAHE3_A/I equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping, low incremental surge resistance, fast response time, and MSL Level 1 reflow compatibility - critical for automotive sensor interfaces, industrial I/O protection, and telecom DC power inputs.
Technical Context
This device operates as a voltage-clamped overvoltage protector with symmetrical avalanche behavior in both directions, enabling robust suppression of ±33 V transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for surface-mount assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it delivers 1500 W peak pulse power handling with 0.01% duty cycle and derates linearly above 25 °C ambient, supported by RθJA = 75 °C/W and RθJL = 15 °C/W thermal metrics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 33 V nominal systems. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering within 12% tolerance band. |
| VC (Clamping) | 45.7 V at 32.8 A - Peak voltage seen by protected circuit during 10/1000 μs transient; limits downstream stress to ≤45.7 V. |
| PPPM | 1500 W - Peak pulse power dissipation capability with standardized 10/1000 μs waveform; meets IEC 61000-4-5 Level 4 requirements. |
| ID (Leakage) | 1.0 μA max at 33 V - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature rating enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD; supports ASIL-B system designs. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current from either polarity; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit point (bidirectional) | Completes surge path to ground or return rail; symmetric with Anode for AC-coupled or differential applications. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded power rails without polarity concerns. |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 32.8 A - sufficient for IEC 61000-4-5 4 kV direct coupling tests on 50 Ω source impedance. |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature; eliminates risk of junction degradation under repeated surge events. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking; reduces manufacturing complexity and cost. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock - suitable for engine control, ADAS, and body electronics. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp transients before reaching ADC input or signal conditioner. Use Value: Maintains signal fidelity below 45.7 V clamping threshold while surviving >1000 surges per AEC-Q101 HTOL testing. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs subjected to EFT bursts and lightning-induced common-mode noise on long cable runs. IC Role / Device Role / Timing Role: Differential-line TVS across A/B bus terminals to suppress ±33 V common-mode transients without disrupting DC bias or data integrity. Use Value: Prevents transceiver latch-up or damage during 4 kV EFT (IEC 61000-4-4) and 2 kV surge (IEC 61000-4-5) events. |
| Telecom DC Power Input | Consumer USB-C Port Protection |
Use Scenario: Shielding 33 V DC input stage of PoE-powered network switches from induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary-level TVS connected between VIN and GND to absorb energy before upstream DC-DC converter. Use Value: Limits input rail overshoot to ≤45.7 V during 10/1000 μs surges, preserving MOSFET gate oxide integrity and controller IC reliability. |
Use Scenario: Adding secondary-level surge immunity to USB-C CC and VBUS lines in portable docking stations handling hot-plug events and cable ESD. IC Role / Device Role / Timing Role: Bidirectional clamp on CC1/CC2 pins to prevent false orientation detection or port controller reset during ±8 kV contact ESD. Use Value: Achieves <1 ns response time and sub-1 μA leakage at 33 V, ensuring no impact on USB PD negotiation timing or voltage accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower peak power (600 W), same VWM/VBR range, SMB (DO-214AA) package - 30% smaller footprint but higher thermal resistance (RθJA = 90 °C/W). | Best suited for space-constrained consumer PCBs where 600 W surge margin suffices; not recommended for automotive under-hood use. | Select when board area is critical and surge severity is limited to IEC 61000-4-5 Level 2 (2 kV). |
| SMCJ33CA | Same SMC package, higher peak power (3000 W), identical VWM/VBR/VC specs - requires larger copper pads (10 mm × 10 mm) for full rating. | Used in high-reliability industrial motor drives and solar inverters where 3000 W surge immunity is mandated. | Choose when system-level surge testing exceeds 4 kV or when extended lifetime under repetitive transients is required. |
Compared with SMBJ33CA and SMCJ33CA, the 1.5SMC33CAHE3_A/I delivers optimal balance of AEC-Q101 qualification, 1500 W rating, and SMC package manufacturability - making it the preferred choice for automotive and industrial applications requiring validated reliability without over-engineering.
Availability
1.5SMC33CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, and telecom power supplies requiring stable component supply, AEC-Q101 compliance, and repeatable surge performance across production batches.
Supply support for 1.5SMC33CAHE3_A/I 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 with emphasis on reliability, precision, and automotive-grade qualification.
The 1.5SMC Series was developed specifically for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against lightning, EFT, and load dump is mandatory.
FAQ
What does the "CA" suffix indicate in 1.5SMC33CAHE3_A/I?
The "CA" suffix in 1.5SMC33CAHE3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. This is essential for protecting AC-coupled signals, differential buses like CAN or RS-485, and ungrounded power rails - unlike unidirectional variants (e.g., "A") that only clamp in one polarity.
Is 1.5SMC33CAHE3_A/I suitable for automotive applications?
Yes, 1.5SMC33CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It has passed stress tests including high-temperature operating life, temperature cycling, and ESD, making it appropriate for engine control units, ADAS camera modules, and body electronics where reliability under thermal and electrical stress is critical.
What is the clamping voltage of 1.5SMC33CAHE3_A/I at its rated peak pulse current?
The clamping voltage (VC) of 1.5SMC33CAHE3_A/I is 45.7 V at 32.8 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value represents the maximum voltage imposed on the protected circuit during a worst-case transient event and is confirmed in Vishay's datasheet revision 09-Mar-2026, page 2.
How does the SMC (DO-214AB) package of 1.5SMC33CAHE3_A/I compare to SMB (DO-214AA)?
The SMC (DO-214AB) package used in 1.5SMC33CAHE3_A/I measures 7.75 mm × 6.22 mm × 2.62 mm and supports higher thermal dissipation than SMB (DO-214AA), enabling its 1500 W rating. Its larger pad area (8.0 mm × 8.0 mm per terminal) lowers thermal resistance (RθJA = 75 °C/W), making it more suitable for automotive and industrial applications than the smaller SMB variant.
Does 1.5SMC33CAHE3_A/I require special PCB layout considerations?
Yes, 1.5SMC33CAHE3_A/I must be mounted on minimum recommended copper pads: 8.0 mm × 8.0 mm per terminal to achieve full 1500 W rating and proper thermal dissipation. Short, direct traces to ground or return paths are essential to minimize inductance and ensure effective clamping - long traces can degrade response time and increase let-through voltage during fast transients.
1.5SMC33CAHE3_A/I 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC33CAHE3_A/I FAQ
1.How can I place an order for 1.5SMC33CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33CAHE3_A/I 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 1.5SMC33CAHE3_A/I reliable?
The price and inventory of 1.5SMC33CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC33CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC33CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33CAHE3_A/I?
1.5SMC33CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33CAHE3_A/I 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 1.5SMC33CAHE3_A/I?
For technical support, including 1.5SMC33CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33CAHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC33CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33CAHE3_A/I 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 1.5SMC33CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC33CAHE3_A/I?
All 1.5SMC33CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33CAHE3_A/I, 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 1.5SMC33CAHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC33CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33CAHE3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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