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Vishay General Semiconductor - Diodes Division SMA5J33CAHE3/5A
- Part No.:
- SMA5J33CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33CAHE3/5A.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,480
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Product details
Overview
SMA5J33CAHE3/5A 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 voltage (VBR), 500 W peak pulse power (10/1000 μs), clamping voltage of 53.3 V at 9.4 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMA5J33CAHE3/5A datasheet, SMA5J33CAHE3/5A pinout, SMA5J33CAHE3/5A application, or SMA5J33CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, low incremental surge resistance, MSL Level 1 solderability, and compliance with IEC 61000-4-2/4-4/4-5 for system-level ESD and surge immunity.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche junction to clamp reverse surges symmetrically in both directions. Its glass-passivated chip junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Designed for surface-mount placement on PCBs with minimum 5.0 mm × 5.0 mm copper pads per terminal, it delivers thermal resistance of 80 °C/W (junction-to-ambient) and supports operating junction temperatures from –55 °C to +150 °C - critical for under-hood automotive and industrial environments.
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 at 1 mA - defines guaranteed avalanche initiation window for design margining |
| VC @ IPPM | 53.3 V at 9.4 A - clamped voltage seen by protected circuit during 10/1000 μs surge |
| PPPM | 500 W - peak surge energy handling capacity per single transient event |
| TJ max. | +150 °C - enables deployment in high-temperature automotive engine control units and power converters |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability and lifetime performance |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Both terminals function identically; current flows either direction during overvoltage events |
| Case (SMA body) | Thermal and mechanical interface | Plastic-molded DO-214AC body provides UL 94 V-0 flammability rating and 25 °C/W junction-to-lead thermal path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a) |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity restrictions |
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, reducing parameter drift in harsh environments |
| AEC-Q101 qualification | Validated for automotive applications including infotainment, ADAS sensors, and body control modules |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs against load dump and inductive switching transients in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines to clamp ±50 V surges within 1 ns. Use Value: Prevents latch-up or permanent damage to transceivers while maintaining signal integrity up to 1 Mbps. |
Use Scenario: Safeguarding RS-485/RS-422 physical layer interfaces in factory automation PLCs exposed to motor drive noise. IC Role / Device Role / Timing Role: Standoff protection device shunting common-mode surges between A/B lines and ground. Use Value: Maintains data integrity during 4 kV EFT bursts and 1 kV surge events per IEC 61000-4-4/4-5. |
| Consumer Power Adapter Input | Telecom PoE Midspan Protection |
Use Scenario: Secondary-side DC input protection in USB-C PD adapters subjected to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Clamping device across VBUS and GND to limit transient excursions to ≤53.3 V. Use Value: Enables compliance with UL 62368-1 transient immunity requirements without derating downstream regulators. |
Use Scenario: Ethernet port protection in IEEE 802.3af/at midspan injectors where DC bias and data coexist on same pairs. IC Role / Device Role / Timing Role: Bidirectional suppressor across power pair (PSE side) to absorb 10/1000 μs surges up to 500 W. Use Value: Preserves PoE negotiation timing and prevents false disconnects during lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33CA-M3/5A | Halogen-free, RoHS-compliant; identical electrical specs and AEC-Q101 qualification | No functional difference; used where halogen-free material compliance is mandated | Select when environmental compliance requires bromine/chlorine-free molding compound |
| SMCJ33CAHE3/5A | Same VWM/VBR/VC but in larger SMC (DO-214AB) package; higher thermal mass and RθJA = 35 °C/W | Better suited for >1000 W surge duty cycles or higher ambient temperature PCB layouts | Choose when board space allows and thermal dissipation exceeds SMA5J33CAHE3/5A's 500 W rating |
Compared with SMA5J33CAHE3/5A, the M3 variant offers identical protection performance with halogen-free materials, while the SMCJ33CAHE3/5A provides superior thermal handling at the cost of footprint size - enabling extended surge endurance in high-reliability industrial power supplies.
Availability
SMA5J33CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, and telecom power-over-Ethernet systems requiring stable component supply with AEC-Q101 traceability and full RoHS compliance.
Supply support for SMA5J33CAHE3/5A 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, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained automotive and industrial applications, delivering robust 500 W surge handling in the compact SMA package.
FAQ
What is the polarity configuration of SMA5J33CAHE3/5A?
The SMA5J33CAHE3/5A is a bidirectional TVS diode with no polarity marking on the SMA (DO-214AC) package. Both terminals are functionally identical, allowing it to suppress positive and negative transients symmetrically across protected lines - ideal for AC-coupled or floating interfaces like CAN, RS-485, or audio signal paths.
Does SMA5J33CAHE3/5A meet automotive qualification standards?
Yes, SMA5J33CAHE3/5A is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3". This certification validates its reliability for automotive applications including engine control, body electronics, and ADAS sensor interfaces under temperature cycling, humidity, and surge stress conditions.
What is the clamping voltage of SMA5J33CAHE3/5A at rated surge current?
The SMA5J33CAHE3/5A clamps to a maximum of 53.3 V at its rated peak pulse current (IPPM) of 9.4 A under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SMA5J33CAHE3/5A be used in place of a unidirectional TVS like SMA5J33AHE3/5A?
No - SMA5J33CAHE3/5A is bidirectional and lacks polarity marking, whereas SMA5J33AHE3/5A is unidirectional with cathode band identification. Substitution requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating lines; unidirectional is required for DC-biased rails where forward conduction must be blocked.
What is the thermal resistance of SMA5J33CAHE3/5A under standard mounting conditions?
Under standard JEDEC test conditions (0.2" × 0.2" copper pads per terminal), SMA5J33CAHE3/5A exhibits a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W. Its junction-to-lead resistance (RθJL) is 25 °C/W, supporting efficient heat transfer to PCB copper when layout follows Vishay's recommended pad dimensions.
SMA5J33CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J33CAHE3/5A FAQ
1.How can I place an order for SMA5J33CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33CAHE3/5A 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 SMA5J33CAHE3/5A reliable?
The price and inventory of SMA5J33CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J33CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33CAHE3/5A?
SMA5J33CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33CAHE3/5A 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 SMA5J33CAHE3/5A?
For technical support, including SMA5J33CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33CAHE3/5A requirements.
6.How does Aetrix verify that SMA5J33CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J33CAHE3/5A 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 SMA5J33CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J33CAHE3/5A?
All SMA5J33CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33CAHE3/5A, 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 SMA5J33CAHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J33CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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