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Vishay General Semiconductor - Diodes Division 1.5SMC33AHE3_A/I
- Part No.:
- 1.5SMC33AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC33AHE3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,625
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Product details
Overview
1.5SMC33AHE3_A/I 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 sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC33AHE3_A/I datasheet, 1.5SMC33AHE3_A/I pinout, 1.5SMC33AHE3_A/I application, or 1.5SMC33AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, SMC (DO-214AB) package compatibility, low clamping ratio (VC/VWM ≈ 1.62), and 1.0 μA max reverse leakage at VWM, critical for low-power and high-reliability embedded systems.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable avalanche behavior under transient stress. Its thermal resistance (RθJA = 75 °C/W) and junction temperature range (–65 °C to +150 °C) support operation in automotive under-hood and industrial control environments without active cooling.
The device meets J-STD-020 MSL Level 1 moisture sensitivity and withstands 260 °C lead-free reflow peaks. Its 1500 W pulse rating is specified at TA = 25 °C on 8.0 mm × 8.0 mm copper pads, with derating above ambient per Figure 2 - enabling predictable performance in thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines reliable avalanche initiation threshold for repeatable clamping |
| VWM | 28.2 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | ≤45.7 V at 32.8 A - clamping voltage during 1500 W transient, determining protected circuit's peak stress |
| IPPM | 32.8 A - peak pulse current capability with 10/1000 μs waveform, defining surge handling capacity |
| PPPM | 1500 W - peak pulse power dissipation, specifying energy absorption limit per transient event |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage ensures minimal standby power loss in battery-powered systems |
| TJ max | +150 °C - enables use in high-temperature automotive and industrial enclosures without derating |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode identified by a band on the body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when VAK exceeds VBR |
| Anode (unbanded end) | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 surge events without degradation |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes overvoltage exposure to downstream ICs such as CAN transceivers or microcontrollers |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free assembly without baking or special handling |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 5 V or 12 V analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp fast-rising surges before they reach ADC inputs or op-amps. Use Value: Prevents latch-up or permanent damage to precision front-end circuitry while maintaining signal integrity below 28.2 V normal operation. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or optocoupler input side, absorbing repetitive 1500 W transients without parameter drift. Use Value: Extends module MTBF by eliminating false triggering and component failure caused by 10/1000 μs lightning-induced surges on factory floor wiring. |
| DC Power Rail Protection | USB/Serial Interface Protection |
Use Scenario: Secondary surge suppression on regulated 3.3 V or 5 V supply rails feeding microcontrollers and communication ICs in embedded gateways. IC Role / Device Role / Timing Role: Fast-response shunt device that activates within <1 ns to divert >30 A surge current away from sensitive LDOs and PMICs. Use Value: Maintains rail stability during transient events, avoiding brownout resets and ensuring deterministic system recovery. |
Use Scenario: Protecting RS-232, RS-485, or USB 2.0 data lines in industrial HMIs and medical devices from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) unidirectional suppressor placed between signal line and ground, preserving signal rise/fall times. Use Value: Enables compliance with IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without compromising data rate or signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Same VWM (28.2 V) and VC (45.7 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA) | Not AEC-Q101 qualified; suitable for commercial-grade consumer electronics only | Select when space-constrained layout permits smaller SMA and automotive qualification is unnecessary |
| 1.5KE33A | Through-hole DO-201 package; identical electrical specs but no AEC-Q101 qualification and higher mounting thermal resistance | Limited to non-automotive industrial or prototyping use due to lack of automotive reliability validation | Choose only for legacy through-hole designs or where automated SMT placement is unavailable |
Compared with 1.5SMC33AHE3_A/I, SMAJ33A-E3/57T offers reduced surge margin and no automotive qualification, while 1.5KE33A sacrifices surface-mount compatibility and automotive compliance - making 1.5SMC33AHE3_A/I the sole option meeting AEC-Q101, SMC packaging, and full 1500 W capability in one device.
Availability
1.5SMC33AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecommunications infrastructure requiring stable component supply, AEC-Q101 assurance, and high-energy transient immunity.
Supply support for 1.5SMC33AHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and consistent clamping performance are mandatory.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC33AHE3_A/I?
The 1.5SMC33AHE3_A/I has a specified breakdown voltage (VBR) range of 31.4 V to 34.7 V at 1 mA test current, representing a ±5% tolerance around the nominal 33 V rating. This tight distribution ensures predictable clamping onset across production lots and supports reliable design margining in safety-critical circuits.
Is the 1.5SMC33AHE3_A/I RoHS-compliant and halogen-free?
Yes, the 1.5SMC33AHE3_A/I carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. However, it is not halogen-free - that designation applies only to HM3-suffixed variants. The HE3 version uses standard brominated flame-retardant molding compound meeting UL 94 V-0.
What is the maximum allowable reverse leakage current for the 1.5SMC33AHE3_A/I at 25 °C?
The 1.5SMC33AHE3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated stand-off voltage (VWM = 28.2 V) and TA = 25 °C. This ultra-low leakage preserves battery life in always-on automotive modules and avoids false triggering in high-impedance sensing circuits.
Can the 1.5SMC33AHE3_A/I be used in bidirectional configurations?
No - the 1.5SMC33AHE3_A/I is strictly unidirectional, as indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies part numbers ending in "CA", such as 1.5SMC33CAHE3_A/I, which provides symmetrical clamping in both polarities and lacks polarity marking.
What is the thermal resistance from junction to ambient for the 1.5SMC33AHE3_A/I under standard mounting conditions?
The 1.5SMC33AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad per terminal. This value assumes still air convection and forms the basis for calculating safe power derating above 25 °C ambient.
1.5SMC33AHE3_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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC33AHE3_A/I FAQ
1.How can I place an order for 1.5SMC33AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC33AHE3_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 1.5SMC33AHE3_A/I reliable?
The price and inventory of 1.5SMC33AHE3_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 1.5SMC33AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC33AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC33AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC33AHE3_A/I?
1.5SMC33AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC33AHE3_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 1.5SMC33AHE3_A/I?
For technical support, including 1.5SMC33AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC33AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC33AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC33AHE3_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 1.5SMC33AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC33AHE3_A/I?
All 1.5SMC33AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC33AHE3_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 1.5SMC33AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC33AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC33AHE3_A/I Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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