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Vishay General Semiconductor - Diodes Division SMA5J33A-E3/61
- Part No.:
- SMA5J33A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33A-E3/61.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,201
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Product details
Overview
SMA5J33A-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), 500 W peak pulse power (PPPM), 9.4 A peak pulse current (IPPM), and clamps transients to ≤53.3 V at rated surge. It is widely used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J33A-E3/61 datasheet, SMA5J33A-E3/61 pinout, SMA5J33A-E3/61 application, or SMA5J33A-E3/61 equivalent, key selection criteria include unidirectional polarity, 500 W 10/1000 μs surge rating, 33 V operating voltage window, thermal resistance (RθJA = 80 °C/W), and AEC-Q101 qualification availability via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at VWM), while its low incremental surge resistance enables effective energy diversion during fast transients (e.g., ISO 7637-2 pulses).
The SMA5J33A-E3/61 is rated for -55 °C to +150 °C junction temperature, supports automated SMT placement, and meets J-STD-020 MSL Level 1 (peak reflow 260 °C). Its DO-214AC package provides mechanical robustness and thermal performance suitable for board-level protection without heatsinking under typical derating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 36.7 V / 40.6 V - guaranteed avalanche breakdown range at 1 mA test current |
| VC @ IPPM | ≤53.3 V - clamped voltage during 9.4 A 10/1000 μs surge, defining worst-case protected node voltage |
| PPPM | 500 W - peak transient power handling capability per standard 10/1000 μs waveform |
| IFSM | 40 A - non-repetitive forward surge rating (8.3 ms half-sine), relevant for fault-current limiting |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood automotive environments |
| RθJA | 80 °C/W - thermal resistance from junction to ambient on standard 5 mm × 5 mm copper pads |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode band marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), matte tin-plated leads, RoHS-compliant (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 33 V rail); conducts when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables compact PCB layout and compatibility with high-density automated assembly lines |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with <1.0 μA leakage at 33 V |
| 500 W 10/1000 μs surge rating | Provides robust protection against load-dump and inductive-switching transients per ISO 16750-2 |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking preconditioning |
| AEC-Q101 qualification option | Available in HE3 variant for automotive-grade reliability validation (not included in E3/61 base part) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 33 V supply rails in engine control units (ECUs) against ISO 7637-2 pulse 5a (load dump) and pulse 1/2a (inductive switching). IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between rail and ground, activated only during overvoltage events. Use Value: Limits rail voltage to ≤53.3 V during 9.4 A surges, preventing damage to downstream 33 V-rated microcontrollers and power management ICs. | Use Scenario: Safeguarding analog input pins of industrial current/voltage sensors exposed to field wiring transients. IC Role / Device Role / Timing Role: Standby protection element shunting surge energy away from precision amplifier inputs and ADC front-ends. Use Value: Maintains signal integrity by clamping transients within 1 ns response time while adding <1.0 μA leakage at 33 V operating point. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
Use Scenario: Securing 33 V DC input ports of telecom remote radio units (RRUs) against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bulk power entry, coordinated with upstream fuses and secondary filtering. Use Value: Absorbs up to 500 W transient energy without degradation, supporting long-term reliability in harsh outdoor deployments. | Use Scenario: Adding cost-effective surge immunity to 33 V auxiliary power inputs in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Low-cost, surface-mount TVS placed adjacent to DC jack to suppress ESD and cable discharge events. Use Value: Delivers 500 W surge rating in a 0.064 g SMA package, minimizing BOM count and PCB area versus discrete resistor-capacitor-diode networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33A-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and package | No functional difference; selected where halogen-free compliance is mandated (e.g., EU public infrastructure projects) | Choose M3/61 if halogen-free material declaration is required; otherwise E3/61 is standard commercial grade |
| SMA5J33CA-E3/61 | Bidirectional version: symmetric VBR (36.7–40.6 V) in both directions; no polarity marking | Required for AC-coupled or floating signal lines where voltage reversal occurs (e.g., RS-485, CAN bus) | Select SMA5J33CA-E3/61 only when bidirectional clamping is needed; SMA5J33A-E3/61 is correct for DC rail protection |
Compared with SMA5J33A-M3/61, the SMA5J33A-E3/61 offers identical surge performance but uses standard RoHS-compliant plating without halogen-free certification; compared with SMA5J33CA-E3/61, it provides unidirectional clamping optimized for DC power rails, avoiding unnecessary complexity on single-polarity nodes.
Availability
SMA5J33A-E3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, telecom power supplies, and consumer DC-input devices requiring stable component supply and consistent surge protection performance across production batches.
Supply support for SMA5J33A-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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained applications, targeting design-in across automotive, industrial, and communications systems where robust 500 W surge handling and AEC-Q101 readiness are critical.
FAQ
What is the clamping voltage of the SMA5J33A-E3/61 under full-rated surge conditions?
The SMA5J33A-E3/61 clamps to a maximum of 53.3 V when subjected to its rated 9.4 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on the protected circuit during surge events. The SMA5J33A-E3/61 maintains this clamping performance consistently across its qualified operating temperature range.
Is the SMA5J33A-E3/61 suitable for automotive applications?
The SMA5J33A-E3/61 itself is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the functionally identical SMA5J33AHE3_A variant (with HE3 suffix) that is fully AEC-Q101 qualified for automotive use. Engineers specifying the SMA5J33A-E3/61 for under-hood or chassis-mounted designs should verify qualification requirements and consider upgrading to the HE3 version. The SMA5J33A-E3/61 shares the same electrical characteristics, package, and thermal behavior as its automotive counterpart.
What does the "-E3/61" suffix indicate in SMA5J33A-E3/61?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "/61" specifies packaging in 7-inch diameter plastic tape and reel containing 1800 units. This ordering code confirms compliance with JEDEC standards for solderability (J-STD-002) and whisker resistance (JESD 201 Class 2), and indicates the part is supplied ready for high-speed SMT placement. The SMA5J33A-E3/61 is not halogen-free - that variant uses the M3 suffix instead.
How does the SMA5J33A-E3/61 compare to SMAJ33A in terms of surge capability?
The SMA5J33A-E3/61 delivers 500 W peak pulse power (PPPM), whereas the older SMAJ33A is rated for only 400 W under the same 10/1000 μs waveform. This 25% higher surge rating allows the SMA5J33A-E3/61 to handle more energetic transients without degradation, making it preferable for demanding applications like automotive load-dump protection. Both share the SMA (DO-214AC) package and similar VWM/VBR ranges, but the SMA5J33A-E3/61 reflects Vishay's enhanced power density design generation.
Can the SMA5J33A-E3/61 be used in bidirectional signal protection?
No - the SMA5J33A-E3/61 is strictly unidirectional and must be installed with correct polarity (cathode band toward the protected line). For bidirectional protection such as on AC-coupled data lines or differential buses, the SMA5J33CA-E3/61 variant must be used instead. Using the SMA5J33A-E3/61 in a bidirectional configuration risks failure during reverse-voltage transients, as it lacks symmetrical breakdown characteristics. Always match device polarity to system signal architecture.
SMA5J33A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMA5J33A-E3/61 FAQ
1.How can I place an order for SMA5J33A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33A-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 SMA5J33A-E3/61 reliable?
The price and inventory of SMA5J33A-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 SMA5J33A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J33A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33A-E3/61?
SMA5J33A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33A-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 SMA5J33A-E3/61?
For technical support, including SMA5J33A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33A-E3/61 requirements.
6.How does Aetrix verify that SMA5J33A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J33A-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 SMA5J33A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J33A-E3/61?
All SMA5J33A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33A-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 SMA5J33A-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J33A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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