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Vishay General Semiconductor - Diodes Division SMA5J33CA-E3/61
- Part No.:
- SMA5J33CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33CA-E3/61.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,383
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Product details
Overview
SMA5J33CA-E3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) 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 (10/1000 µs), clamping voltage of 53.3 V at 9.4 A, and operates from –55 °C to +150 °C - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J33CA-E3/61 datasheet, SMA5J33CA-E3/61 pinout, SMA5J33CA-E3/61 application, or SMA5J33CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, low incremental surge resistance, AEC-Q101 qualification eligibility (via HE3 suffix), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device functions as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and stable clamping under repetitive 10/1000 µs surges. Its bidirectional symmetry ensures identical electrical characteristics in both polarities, eliminating polarity marking on the SMA package.
Thermal performance is defined by RθJA = 80 °C/W (typ.) and RθJL = 25 °C/W (typ.), enabling reliable operation up to TJ = 150 °C when mounted per recommended pad layout. The 500 W PPPM rating applies only with derating above 25 °C ambient, per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before conduction begins; defines safe working margin below clamping threshold |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - guaranteed breakdown onset range; ensures predictable turn-on across production lots |
| VC @ IPPM | 53.3 V at 9.4 A - clamped voltage during full 500 W surge; determines protected circuit's maximum transient exposure |
| PPPM | 500 W (10/1000 µs waveform) - peak surge energy handling capacity; validated with derating above 25 °C ambient |
| ID @ VWM | 1.0 µA max - leakage current at stand-off voltage; ensures minimal power loss and signal integrity in high-impedance circuits |
| TJ Range | –55 °C to +150 °C - extended junction temperature range supports under-hood automotive and industrial environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating; no polarity marking for bidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path (bidirectional) | Identical clamping behavior in either direction; no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Electrical symmetry ensures identical VBR, VC, and IPPM in both polarities - eliminates orientation concerns in AC-coupled or floating lines |
| Glass-passivated junction | Enhances long-term reliability and stability of breakdown voltage under thermal cycling and humidity stress |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, inductive switch-off), improving protection margin |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without moisture sensitivity concerns - compatible with high-volume SMT assembly |
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 ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching sensitive interface ICs. Use Value: Withstands 500 W surges while limiting clamped voltage to 53.3 V - within absolute maximum ratings of most 3.3 V/5 V/12 V automotive transceivers and ADC front-ends. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-induced transients from relay coils, motor drives, and lightning-induced coupling. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 24 V DC I/O terminals, coordinated with series impedance and filtering. Use Value: 33 V VWM provides sufficient margin above nominal 24 V rail while clamping to 53.3 V - prevents latch-up or damage to microcontroller GPIOs and level translators. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHY magnetics and PoE detection circuitry from induced surges on unshielded twisted-pair cabling in enterprise switches and IP cameras. IC Role / Device Role / Timing Role: Secondary-level TVS on low-voltage side of isolation barrier, complementing primary gas discharge tube or GDT protection. Use Value: Sub-nanosecond response and bidirectional symmetry ensure protection against both common-mode and differential-mode transients without polarity constraints. |
Use Scenario: ESD and surge protection on USB-C and barrel-jack inputs of wall adapters and portable chargers exposed to user-handling and mains coupling events. IC Role / Device Role / Timing Role: Final-stage clamping device downstream of fuse and common-mode choke, absorbing residual energy that passes upstream protection. Use Value: 500 W rating and 53.3 V clamping enable compliance with IEC 61000-4-2 (±15 kV air) and IEC 61000-4-5 (Level 3, 1 kV line-earth) without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33CA-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and thermal ratings; same SMA package and MSL Level 1 rating | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects) | Direct drop-in replacement for SMA5J33CA-E3/61 where halogen-free content is required; no layout or qualification changes needed |
| SMA5J33CAHE3_A/H | AEC-Q101 qualified version; same VWM, VBR, VC, PPPM; includes extended reliability testing (HTOL, TC, UHAST) | Required for automotive electronics subject to AEC-Q101 stress requirements (e.g., body control modules, ADAS sensors) | Select SMA5J33CAHE3_A/H when automotive qualification is mandatory; otherwise SMA5J33CA-E3/61 suffices for commercial/industrial use |
Compared with SMA5J33CA-E3/61, the M3 variant adds halogen-free compliance without altering protection performance, while the HE3 variant adds AEC-Q101 qualification for automotive deployment - neither changes pinout, footprint, or electrical behavior in standard operation.
Availability
SMA5J33CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface designs requiring stable component supply, consistent RoHS compliance, and support for high-volume SMT assembly.
Supply support for SMA5J33CA-E3/61 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, power density, and application-specific validation.
The SMA5J series targets high-power-density transient suppression in space-constrained applications - engineered for robustness in automotive, industrial, and telecom environments where 500 W surge handling and thermal stability are critical.
FAQ
What is the clamping voltage of the SMA5J33CA-E3/61 at its rated peak pulse current?
The SMA5J33CA-E3/61 has a maximum clamping voltage (VC) of 53.3 V at its peak pulse current (IPPM) of 9.4 A, measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event and is guaranteed across the operating temperature range.
Is the SMA5J33CA-E3/61 suitable for automotive applications?
The SMA5J33CA-E3/61 itself is not AEC-Q101 qualified, but it shares identical electrical and mechanical specifications with the AEC-Q101-qualified variant SMA5J33CAHE3_A/H. For non-automotive or pre-qualification prototyping use, SMA5J33CA-E3/61 is widely deployed in automotive subsystems; however, final production requires the HE3 suffix for formal qualification compliance.
Does the SMA5J33CA-E3/61 have polarity markings on the package?
No - the SMA5J33CA-E3/61 is a bidirectional TVS diode and carries no cathode band or polarity marking on the SMA (DO-214AC) case. Its symmetrical construction ensures identical clamping behavior regardless of orientation, simplifying PCB layout and automated placement.
What is the thermal resistance from junction to ambient for the SMA5J33CA-E3/61?
The SMA5J33CA-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and is used to calculate junction temperature rise under steady-state or low-duty-cycle surge conditions.
How does the SMA5J33CA-E3/61 differ from unidirectional variants like SMA5J33A-E3/61?
The SMA5J33CA-E3/61 is bidirectional with symmetric VBR, VC, and leakage in both directions and no polarity marking, whereas SMA5J33A-E3/61 is unidirectional with a cathode band, forward voltage drop (~3.5 V at 25 A), and higher IFSM (40 A). Use SMA5J33CA-E3/61 for AC, floating, or polarity-agnostic protection; use the 'A' version for DC rails with defined polarity.
SMA5J33CA-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 9.4A
- 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)
SMA5J33CA-E3/61 FAQ
1.How can I place an order for SMA5J33CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33CA-E3/61 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 SMA5J33CA-E3/61 reliable?
The price and inventory of SMA5J33CA-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J33CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33CA-E3/61?
SMA5J33CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33CA-E3/61 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 SMA5J33CA-E3/61?
For technical support, including SMA5J33CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33CA-E3/61 requirements.
6.How does Aetrix verify that SMA5J33CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J33CA-E3/61 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 SMA5J33CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J33CA-E3/61?
All SMA5J33CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33CA-E3/61, 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 SMA5J33CA-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J33CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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