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Vishay General Semiconductor - Diodes Division SMA5J33CA-E3/5A
- Part No.:
- SMA5J33CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33CA-E3/5A.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J33CA-E3/5A 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) at 1 mA, 500 W peak pulse power (10/1000 µs), clamping voltage of 53.3 V at 9.4 A IPPM, and operates from –55 °C to +150 °C - used in automotive sensor interface protection and industrial I/O line hardening.
For engineers reviewing the SMA5J33CA-E3/5A datasheet, SMA5J33CA-E3/5A pinout, SMA5J33CA-E3/5A application, or SMA5J33CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, low incremental surge resistance, AEC-Q101 qualification eligibility (via HE3/HM3 variants), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and stable clamping under repetitive transients. Its symmetrical avalanche structure ensures identical electrical characteristics in both polarities, with no polarity marking required on the SMA package.
Designed for 10/1000 µs waveform compliance per ANSI/IEEE C62.35, it delivers 53.3 V clamping at 9.4 A peak pulse current while maintaining ≤1.0 µA reverse leakage at 33 V - enabling robust protection of 3.3 V, 5 V, and 24 V interfaces without affecting signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - guaranteed avalanche initiation window; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 53.3 V at 9.4 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPPM | 500 W - peak pulse power handling capacity; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly mounted. |
| ID @ VWM | ≤1.0 µA - ultra-low leakage at rated stand-off voltage; prevents loading of high-impedance sensor or communication lines. |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive and industrial environments. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking; terminals interchangeable - protects against positive and negative transients without orientation dependency. |
| Case (body) | Thermal path / mechanical anchor | Plastic body provides electrical isolation; thermal resistance RθJA = 80 °C/W (typ.) requires minimum 5.0 mm × 5.0 mm copper pad per terminal for full 500 W rating. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure - critical for automotive and industrial field life. |
| MSL Level 1 rating | Allows unlimited floor life and reflow up to 260 °C peak - eliminates baking requirements and simplifies manufacturing logistics. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive CMOS inputs. |
| AEC-Q101 qualification path | HE3/HM3 variants available - enables drop-in qualification for automotive ECUs, ADAS sensors, and body control modules. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ESD events in vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector entry point to shunt surge energy before reaching ASIC or MCU input pins. Use Value: Maintains 33 V stand-off while clamping to 53.3 V - preserves signal fidelity for 12 V supply-referenced sensors and avoids false triggering of overvoltage detection circuits. | Use Scenario: Safeguarding digital and analog input/output channels on programmable logic controller (PLC) modules exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Primary surge suppression device on field-side signal traces, paired with series impedance for impedance matching and filtering. Use Value: 500 W rating sustains repeated 2 kV/1 A surges per IEC 61000-4-4; low leakage prevents DC offset errors in 4–20 mA current loops. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Protecting Ethernet PHY magnetics and PoE injectors from lightning-induced surges on outdoor cabling in enterprise infrastructure. IC Role / Device Role / Timing Role: Secondary-level TVS on secondary side of isolation barrier, coordinated with primary-side MOVs and gas discharge tubes. Use Value: Symmetrical clamping ensures equal protection for differential pairs; 53.3 V VC limits stress on 3.3 V/5 V PHY ICs without requiring additional voltage translation. | Use Scenario: Input-stage surge suppression in AC/DC adapters and USB PD chargers subjected to mains-borne transients and hot-plug events. IC Role / Device Role / Timing Role: Fast-response clamp across bulk capacitor or bridge rectifier output to limit voltage spikes during switching transitions. Use Value: 9.4 A IPPM capability handles 10/1000 µs surges up to 4 kV; RoHS-compliant E3 suffix meets global regulatory requirements for consumer goods. |
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-M3/5A | Halogen-free, RoHS-compliant variant with identical electrical specs and package; same thermal and surge performance. | No difference in circuit function or layout; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects). | Direct material substitution when halogen-free certification is required; no design or test revalidation needed. |
| SMA6J33CA-E3/5A | 600 W peak pulse power (vs. 500 W), same VWM/VBR/VC, larger thermal mass; otherwise identical pinout and footprint. | Higher energy handling enables longer surge duration immunity (e.g., IEC 61000-4-5 6 kV tests); requires verification of PCB copper area for thermal dissipation. | Preferred for enhanced surge margin in harsh environments; verify thermal derating above 25 °C using RθJA = 70 °C/W (typ.) for SMA6J. |
Compared with SMA5J33CA-E3/5A, SMA5J33CA-M3/5A offers identical protection performance with halogen-free construction, while SMA6J33CA-E3/5A increases peak pulse power by 20 % for higher-energy threat levels - both retain SMA (DO-214AC) compatibility but differ in material compliance and thermal capability.
Availability
SMA5J33CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply, consistent surge performance, and RoHS-compliant sourcing.
Supply support for SMA5J33CA-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 density, and application-specific optimization.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered for high-power-density transient suppression in space-constrained, high-reliability applications including automotive, industrial automation, and communications infrastructure.
FAQ
What is the clamping voltage of the SMA5J33CA-E3/5A at its rated peak pulse current?
The SMA5J33CA-E3/5A clamps to 53.3 V at its specified peak pulse current (IPPM) of 9.4 A under a 10/1000 µs waveform. This value is measured with the device mounted on 5.0 mm × 5.0 mm copper pads per terminal, and represents the maximum voltage seen by downstream circuitry during a standardized surge event. The SMA5J33CA-E3/5A maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is the SMA5J33CA-E3/5A suitable for automotive applications?
Yes - the SMA5J33CA-E3/5A is compatible with automotive use, and AEC-Q101 qualified versions (e.g., SMA5J33CAHE3_A/I) are available. While the E3/5A variant itself is commercial-grade, its electrical specifications - including 150 °C TJ max, MSL Level 1, and glass-passivated junction - align with automotive environmental requirements. For certified deployment, engineers should select the HE3 or HM3 suffix variants of SMA5J33CA-E3/5A.
How does the bidirectional configuration of SMA5J33CA-E3/5A affect circuit layout?
The SMA5J33CA-E3/5A has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This simplifies PCB layout and automated assembly - no anode/cathode alignment is required. Engineers can place the SMA5J33CA-E3/5A across any two nodes needing symmetrical overvoltage protection, such as differential data lines or AC-coupled power rails, without modifying schematic symbol polarity.
What is the maximum reverse leakage current for SMA5J33CA-E3/5A at its stand-off voltage?
The SMA5J33CA-E3/5A exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 33 V and TA = 25 °C. This ultra-low leakage ensures minimal loading of high-impedance circuits such as sensor bias networks or precision reference dividers. Leakage remains within specification across the full –55 °C to +125 °C operating range, supporting stable performance in wide-temperature applications.
Can SMA5J33CA-E3/5A be used in parallel for higher surge current handling?
No - SMA5J33CA-E3/5A is not recommended for parallel operation due to parameter mismatch (VBR tolerance ±5 %) causing current imbalance and potential thermal runaway. For higher surge capability, select a single higher-rated device such as SMA6J33CA-E3/5A (600 W) or use staged protection (e.g., upstream GDT + SMA5J33CA-E3/5A). The SMA5J33CA-E3/5A must be applied as a discrete, standalone TVS per protected node.
SMA5J33CA-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:
- 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-E3/5A FAQ
1.How can I place an order for SMA5J33CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33CA-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 SMA5J33CA-E3/5A reliable?
The price and inventory of SMA5J33CA-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 SMA5J33CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J33CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33CA-E3/5A?
SMA5J33CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33CA-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 SMA5J33CA-E3/5A?
For technical support, including SMA5J33CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33CA-E3/5A requirements.
6.How does Aetrix verify that SMA5J33CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J33CA-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 SMA5J33CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J33CA-E3/5A?
All SMA5J33CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33CA-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 SMA5J33CA-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J33CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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