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Vishay General Semiconductor - Diodes Division SMA5J33C-E3/5A
- Part No.:
- SMA5J33C-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33C-E3/5A.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,255
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Product details
Overview
SMA5J33C-E3/5A from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on signal and power lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), 500 W peak pulse power (PPPM), and clamps transients to ≤53.3 V at 9.4 A IPPM under 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J33C-E3/5A datasheet, SMA5J33C-E3/5A pinout, SMA5J33C-E3/5A application, or SMA5J33C-E3/5A equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with electrical characteristics defined identically for forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, enabling consistent clamping performance across repeated transients.
The device meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and is qualified to AEC-Q101 for automotive under-hood and chassis applications. Thermal resistance is 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), supporting reliable operation up to TJ = 150 °C when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse stand-off voltage before clamping begins; defines safe operating margin below breakdown |
| VBR (min/max) | 36.7 V / 40.6 V - guaranteed breakdown range at 1 mA test current; ensures predictable turn-on threshold |
| VC @ IPPM | ≤53.3 V at 9.4 A - clamping voltage under 10/1000 µs surge; limits protected circuit stress during ESD/lightning events |
| PPPM | 500 W - peak pulse power handling with 10/1000 µs waveform; supports high-energy transient suppression |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive environments |
| Polarity | Bi-directional - symmetrical clamping in both directions; eliminates polarity marking and orientation concerns |
| Package | DO-214AC (SMA) - surface-mount package with 5.28 mm × 4.50 mm footprint; compatible with standard SMT pick-and-place |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two unmarked leads (bi-directional type); no cathode band; matte tin-plated terminations solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (unmarked) | Bi-directional surge path | Both terminals function identically as transient conduction paths; no polarity dependency in layout |
| Case (plastic body) | Thermal and mechanical interface | Non-conductive housing; heat dissipation relies on PCB copper pads (0.2" × 0.2") per terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without moisture-induced damage or popcorn effect |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving system immunity |
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 inductive switching transients in 12 V vehicle systems. IC Role / Device Role: Bi-directional clamping element placed between signal line and ground, absorbing energy before it reaches downstream ICs. Use Value: Maintains signal integrity by limiting transient voltage to ≤53.3 V while surviving repetitive 500 W surges - critical for AEC-Q100-compliant microcontrollers. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges and electrostatic discharge in factory automation. IC Role / Device Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with series impedance and filtering components. Use Value: Enables robust operation in harsh industrial environments with >150 °C junction capability and verified performance after 1000+ surge cycles. |
| Telecom Line Interface | Consumer Appliance Power Input |
Use Scenario: Transient suppression on Ethernet PHY differential pairs and RS-485 data lines exposed to lightning-induced surges in outdoor telecom equipment. IC Role / Device Role: Bi-directional TVS placed across differential signal lines to clamp common-mode and differential-mode transients simultaneously. Use Value: Symmetrical clamping ensures balanced signal integrity; low capacitance (<100 pF at VWM) avoids signal distortion at multi-Mbps data rates. | Use Scenario: Secondary-level surge protection on AC/DC adapter inputs and internal 12–24 V rails in smart home appliances subject to mains-borne transients. IC Role / Device Role: Standoff-rated protector upstream of bridge rectifiers and bulk capacitors, diverting energy away from sensitive SMPS controllers. Use Value: 33 V VWM provides sufficient margin above nominal rail voltages while delivering 500 W peak power handling per IEC 61000-4-5 Level 4 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33CAHE3/5A | AEC-Q101 qualified variant with identical VWM/VBR/PPPM specs; differs only in whisker test class (JESD 201 Class 2 vs. Class 1A) | Required for automotive applications demanding enhanced long-term reliability under thermal cycling and vibration | Select SMA5J33CAHE3/5A when full AEC-Q101 traceability and extended whisker resistance are mandated |
| SMCJ33CA | Same VWM/VBR/VC ratings but in larger DO-214AB (SMC) package; higher thermal mass yields lower RθJA (35 °C/W vs. 80 °C/W) | Better suited for high-duty-cycle surge environments where sustained power dissipation exceeds SMA5J33C-E3/5A's capability | Choose SMCJ33CA when board space allows and thermal derating at elevated ambient temperatures is critical |
Compared with SMA5J33C-E3/5A, SMA5J33CAHE3/5A offers identical electrical performance with enhanced process qualification, while SMCJ33CA trades smaller footprint for superior thermal performance - enabling longer surge endurance in thermally constrained designs.
Availability
SMA5J33C-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and consumer appliance power input circuits requiring stable component supply and AEC-Q101-compliant surge suppression.
Supply support for SMA5J33C-E3/5A 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, power efficiency, and automotive-grade qualification.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount transient suppression in automotive, industrial, and communications systems where compact size and repeatable clamping performance are essential.
FAQ
What is the polarity configuration of SMA5J33C-E3/5A?
SMA5J33C-E3/5A is a bi-directional transient voltage suppressor, meaning it functions identically in both forward and reverse bias directions. Unlike uni-directional variants (e.g., SMA5J33A), it has no cathode marking and does not require orientation during PCB placement - simplifying layout and reducing assembly errors in differential or AC-coupled signal paths.
Does SMA5J33C-E3/5A meet automotive qualification standards?
Yes, SMA5J33C-E3/5A is RoHS-compliant and manufactured to AEC-Q101 qualification standards. This certification confirms its suitability for automotive applications including engine control, body electronics, and ADAS sensor interfaces, with validated performance across temperature cycling, humidity, mechanical shock, and surge lifetime testing per the AEC-Q101 stress test schedule.
What is the maximum clamping voltage for SMA5J33C-E3/5A under surge conditions?
The maximum clamping voltage (VC) for SMA5J33C-E3/5A is 53.3 V at a peak pulse current (IPPM) of 9.4 A, measured using the standardized 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case transient events, ensuring downstream ICs remain within safe operating voltage margins.
How is thermal performance characterized for SMA5J33C-E3/5A?
SMA5J33C-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W and junction-to-lead resistance (RθJL) of 25 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. These values assume JEDEC-standard mounting and define allowable power dissipation derating above TA = 25 °C - critical for maintaining TJ ≤ 150 °C in enclosed or high-ambient environments.
What packaging format does SMA5J33C-E3/5A ship in?
SMA5J33C-E3/5A ships in 13-inch diameter plastic tape and reel format, with a base quantity of 7500 units per reel (ordering code suffix "/5A"). The "E3" designation indicates RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance requirements.
SMA5J33C-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J33C-E3/5A FAQ
1.How can I place an order for SMA5J33C-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33C-E3/5A 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 SMA5J33C-E3/5A reliable?
The price and inventory of SMA5J33C-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33C-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J33C-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33C-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33C-E3/5A?
SMA5J33C-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33C-E3/5A 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 SMA5J33C-E3/5A?
For technical support, including SMA5J33C-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33C-E3/5A requirements.
6.How does Aetrix verify that SMA5J33C-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J33C-E3/5A 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 SMA5J33C-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J33C-E3/5A?
All SMA5J33C-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33C-E3/5A, 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 SMA5J33C-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J33C-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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