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Vishay General Semiconductor - Diodes Division SMA5J33CA-M3/5A
- Part No.:
- SMA5J33CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33CA-M3/5A.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,343
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Product details
Overview
SMA5J33CA-M3/5A 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 standoff voltage (VWM), 36.7–40.6 V breakdown range (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 - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J33CA-M3/5A datasheet, SMA5J33CA-M3/5A pinout, SMA5J33CA-M3/5A application, or SMA5J33CA-M3/5A equivalent, key selection criteria include bidirectional clamping capability, halogen-free RoHS compliance (M3 suffix), 500 W surge rating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes. Its bidirectional architecture ensures symmetrical clamping in both polarities without external polarity management.
The device is rated for 500 W peak pulse power under standardized 10/1000 μs waveform conditions, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), supporting reliable operation in compact PCB layouts with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V - verified breakdown threshold at 1 mA test current; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 53.3 V at 9.4 A - clamping voltage during 500 W surge event; limits downstream IC stress below 5.5 V logic rail tolerance. |
| PPPM | 500 W - peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity. |
| Junction Temp Range | −55 °C to +150 °C - enables deployment in under-hood automotive and industrial environments without derating. |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint; compatible with J-STD-020 MSL level 1 reflow profile (260 °C peak). |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration with no polarity marking; matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction when voltage exceeds VBR. |
| Case (body) | Thermal and mechanical interface | Non-electrical; transfers heat to PCB copper pads (recommended 5.0 mm × 5.0 mm per terminal) for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, sensor bridges) without polarity constraints. |
| 500 W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics with minimal board space. |
| Halogen-free & RoHS-compliant (M3) | Complies with EU Directive 2011/65/EU and IPC-1752A material declarations; suitable for green manufacturing programs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; reduces production handling overhead and cost. |
| AEC-Q101 qualification option | Available in HM3 variant (SMA5J33CAHM3_A/I); validated for automotive under-hood applications per stress test requirements. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient overvoltage to <53.3 V during 10/1000 μs surges. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADC front-ends while maintaining 33 V system compatibility. |
Use Scenario: Shielding 24 V digital input modules from field-wiring induced transients in PLC backplanes. IC Role / Device Role / Timing Role: Fast-response surge shunt placed directly at connector entry point before optocoupler or Schmitt trigger input. Use Value: Enables robust Class III IEC 61000-4-4 EFT immunity (4 kV) without increasing input filter capacitance or signal delay. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Safeguarding RS-485 transceivers in outdoor security camera links subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Common-mode TVS pair (two SMA5J33CA-M3/5A) across differential pair to ground. Use Value: Maintains signal integrity up to 10 Mbps by limiting clamping overshoot to <53.3 V while surviving repeated 500 W pulses. |
Use Scenario: Secondary-side overvoltage suppression on 24 V DC output rails of wall-mounted USB-C PD adapters. IC Role / Device Role / Timing Role: Final-stage crowbar element absorbing residual flyback transformer ringing and MOSFET switching spikes. Use Value: Eliminates need for additional Zener+capacitor network; reduces BOM count and improves reliability over discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ33CA | Same SMA package, 33 V VWM, but lower PPPM = 400 W; clamping voltage 53.3 V at 7.5 A. | Marginally lower surge capacity; suitable only where IEC 61000-4-5 Level 2 (0.5 kV) suffices. | Select SMA5J33CA-M3/5A when full 500 W rating and higher IPPM (9.4 A) are required for Level 3 compliance. |
| ON Semiconductor 1.5SMC33CA | Same electrical specs but in larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); 1.5 kW rating, not 500 W. | Requires 78 % more PCB area; used where higher surge margin justifies footprint penalty. | Choose SMA5J33CA-M3/5A for space-constrained designs needing identical 33 V clamping in minimal SMA footprint. |
Compared with SMAJ33CA and 1.5SMC33CA, the SMA5J33CA-M3/5A delivers optimal balance of 500 W surge rating, SMA footprint efficiency, and halogen-free compliance - making it preferred for high-density automotive and industrial PCBs where thermal performance and RoHS alignment are critical.
Availability
SMA5J33CA-M3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, halogen-free compliance, and AEC-Q101-qualified traceability.
Supply support for SMA5J33CA-M3/5A 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, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, ruggedness, and application-specific validation.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, repeatable clamping, and extended temperature operation are mandatory.
FAQ
What is the clamping voltage of the SMA5J33CA-M3/5A at its rated peak pulse current?
The SMA5J33CA-M3/5A has a maximum clamping voltage (VC) of 53.3 V at its peak pulse current (IPPM) of 9.4 A under 10/1000 μs waveform conditions. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream circuitry remains within safe voltage limits during surge events. The SMA5J33CA-M3/5A maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is the SMA5J33CA-M3/5A suitable for automotive applications?
Yes, the SMA5J33CA-M3/5A is halogen-free and RoHS-compliant (M3 suffix), and an AEC-Q101-qualified version (SMA5J33CAHM3_A/I) is available. While the base SMA5J33CA-M3/5A itself is commercial-grade, its 150 °C junction rating, glass-passivated junction, and robust surge capability make it widely deployed in non-safety-critical automotive subsystems such as body control modules and sensor interfaces. The SMA5J33CA-M3/5A meets MSL level 1 for lead-free reflow compatibility.
How does the bidirectional design of the SMA5J33CA-M3/5A affect PCB layout?
The SMA5J33CA-M3/5A has no polarity marking and functions identically in both directions, eliminating orientation concerns during automated placement. This simplifies PCB layout by removing the need for silkscreen polarity indicators or asymmetric trace routing. Engineers place the SMA5J33CA-M3/5A symmetrically across protected lines (e.g., between signal and ground or across differential pairs), reducing design iteration time and assembly errors. Its SMA package requires only 5.0 mm × 5.0 mm copper pads per terminal for thermal performance.
What is the difference between the "M3" and "E3" suffixes in the SMA5J33CA-M3/5A ordering code?
The "M3" suffix in SMA5J33CA-M3/5A denotes halogen-free, RoHS-compliant construction with JESD 201 class 2 whisker resistance, while "E3" indicates standard RoHS compliance without halogen-free assurance. Both meet JEDEC J-STD-020 MSL level 1 and share identical electrical specifications. The SMA5J33CA-M3/5A is preferred for green manufacturing programs requiring full halogen-free material declarations per IPC-1752A, whereas E3 variants may be selected where halogen content is unrestricted.
Can the SMA5J33CA-M3/5A replace older SMAJ33CA devices in existing designs?
The SMA5J33CA-M3/5A is a direct form-fit-function replacement for SMAJ33CA in most cases: same SMA (DO-214AC) package, identical pinout, and matching 33 V VWM. However, the SMA5J33CA-M3/5A offers higher peak pulse power (500 W vs. 400 W) and improved thermal resistance (RθJA = 80 °C/W). No PCB changes are needed, but designers should verify that the increased IPPM (9.4 A vs. 7.5 A) does not exceed trace current ratings in legacy layouts. The SMA5J33CA-M3/5A enhances surge margin without layout revision.
SMA5J33CA-M3/5A 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-M3/5A FAQ
1.How can I place an order for SMA5J33CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33CA-M3/5A 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-M3/5A reliable?
The price and inventory of SMA5J33CA-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33CA-M3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J33CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33CA-M3/5A?
SMA5J33CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33CA-M3/5A 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-M3/5A?
For technical support, including SMA5J33CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33CA-M3/5A requirements.
6.How does Aetrix verify that SMA5J33CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J33CA-M3/5A 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-M3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J33CA-M3/5A?
All SMA5J33CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33CA-M3/5A, 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-M3/5A part is unused and in its original packaging.
Return procedure for SMA5J33CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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