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Vishay General Semiconductor - Diodes Division SMA5J33CAHE3_A/I
- Part No.:
- SMA5J33CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33CAHE3_A/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,098
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Product details
Overview
SMA5J33CAHE3_A/I from Vishay General Semiconductor is a bidirectional 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 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, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMA5J33CAHE3_A/I datasheet, SMA5J33CAHE3_A/I pinout, SMA5J33CAHE3_A/I application, or SMA5J33CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.61), MSL Level 1 moisture sensitivity, and RoHS-compliant AEC-Q101 qualification for under-hood and ADAS subsystems.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and robust surge handling across -55 °C to +150 °C junction temperature range.
The device delivers 500 W peak pulse power with a 10/1000 µs waveform under standard test conditions (mounted on 5.0 mm × 5.0 mm copper pads), and exhibits low incremental surge resistance for tight clamping-critical for safeguarding sensitive MOSFET gates and sensor interfaces against ISO 7637-2 and IEC 61000-4-5 transients.
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 automotive systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown threshold ensures reliable triggering above system nominal voltage. |
| VC @ IPPM | 53.3 V at 9.4 A - Clamping voltage limits stress on downstream ICs during 500 W surge events. |
| PPPM | 500 W - Peak pulse power rating per 10/1000 µs waveform; supports robust protection against load dump and inductive switching. |
| TJ max. | +150 °C - Enables operation in high-temperature under-hood environments without derating. |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC standard. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with automated placement. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No cathode band; terminals interchangeable - enables protection of AC signals, differential buses, or floating rails without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both polarities - eliminates need for dual-device solutions on balanced lines like CAN FD or RS-485. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and ESD - supports direct integration into ASIL-B compliant power domains. |
| Low clamping ratio | VC/VWM = 1.61 - minimizes overvoltage exposure to protected ICs compared to alternatives with ratios >1.7. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60 % RH - allows use in standard SMT assembly without baking or special handling. |
| Glass-passivated junction | Stable leakage <1.0 µA at VWM - prevents standby current degradation in always-on vehicle modules. |
Applications
| Automotive Power Rail Protection | CAN FD Bus Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role: Primary shunt clamp absorbing up to 500 W surges while limiting rail voltage to ≤53.3 V. Use Value: Prevents latch-up or gate oxide damage in PMICs and microcontrollers without requiring series impedance. |
Use Scenario: Safeguarding CAN FD transceivers against ESD (IEC 61000-4-2) and fast transient bursts (IEC 61000-4-4). IC Role / Device Role: Bidirectional voltage clamp placed across CANH–CANL differential pair. Use Value: Maintains signal integrity by clamping common-mode surges without distorting differential signaling up to 5 Mbps. |
| Industrial Sensor Interface | Telecom DC Power Input |
Use Scenario: Shielding analog front-end circuits (e.g., pressure or temperature sensors) from inductive kickback in factory automation PLCs. IC Role / Device Role: Low-capacitance (<100 pF typical at 0 V) TVS on 3.3 V or 5 V sensor supply lines. Use Value: Suppresses transients without attenuating low-frequency sensor signals or introducing noise coupling. |
Use Scenario: Securing 48 V DC input of PoE-powered network switches and base station radios against lightning-induced surges. IC Role / Device Role: First-stage clamping device upstream of DC-DC converters and hot-swap controllers. Use Value: Withstands repeated 500 W pulses while maintaining VWM margin above 48 V nominal, reducing need for secondary protection stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33CAHM3_A/I | Halogen-free variant; identical electrical specs and AEC-Q101 qualification. | No difference in circuit function or layout; differs only in material compliance (halogen-free vs. standard RoHS). | Select SMA5J33CAHM3_A/I when halogen-free compliance is mandated by OEM environmental requirements. |
| SMCJ33CAHE3_A/I | Same VWM/VBR/VC, but higher PPPM = 1500 W in larger SMC (DO-214AB) package. | Requires larger PCB footprint and higher thermal mass; suited for higher-energy surge environments (e.g., chassis-level inputs). | Choose SMA5J33CAHE3_A/I for space-constrained board areas where 500 W protection suffices; upgrade to SMCJ33CAHE3_A/I only if system-level testing demands >1 kW surge handling. |
Compared with SMA5J33CAHM3_A/I, the SMA5J33CAHE3_A/I offers identical protection performance with standard RoHS compliance; versus SMCJ33CAHE3_A/I, it trades 1000 W headroom for 40 % smaller footprint and lower thermal inertia-ideal for module-level rather than system-level protection.
Availability
SMA5J33CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input circuits requiring stable component supply, AEC-Q101 qualification, and surface-mount surge protection in compact SMA packages.
Supply support for SMA5J33CAHE3_A/I 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-grade validation.
The SMA5JxxCA family delivers high-power-density TVS diodes optimized for space-constrained, high-reliability applications including automotive control units, industrial automation, and communications infrastructure where bidirectional surge immunity is mandatory.
FAQ
What is the clamping voltage of the SMA5J33CAHE3_A/I at its rated peak pulse current?
The SMA5J33CAHE3_A/I has a maximum clamping voltage (VC) of 53.3 V at its peak pulse current (IPPM) of 9.4 A, measured under the standard 10/1000 µs waveform condition. This value is confirmed in the Vishay datasheet Document Number 88875, Table "ELECTRICAL CHARACTERISTICS", row for SMA5J33CA. The SMA5J33CAHE3_A/I maintains this clamping performance bidirectionally.
Is the SMA5J33CAHE3_A/I suitable for automotive applications?
Yes, the SMA5J33CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use, as indicated by the "HE3" suffix and documentation in the Vishay datasheet. It meets requirements for temperature cycling, high-temperature reverse bias, and ESD robustness required in engine control, body electronics, and ADAS modules. The SMA5J33CAHE3_A/I operates reliably from -55 °C to +150 °C.
Does the SMA5J33CAHE3_A/I have polarity markings on the package?
No, the SMA5J33CAHE3_A/I does not have polarity markings such as a cathode band because it is a bidirectional TVS diode. Its symmetrical construction means both terminals are functionally identical, allowing flexible placement across differential or AC-coupled signal paths. This is specified in the "MECHANICAL DATA" section of the Vishay datasheet for SMA5JxxCA devices.
What is the standoff voltage (VWM) rating for the SMA5J33CAHE3_A/I?
The standoff voltage (VWM) for the SMA5J33CAHE3_A/I is 33 V - the maximum DC or continuous reverse working voltage the device can withstand without entering avalanche conduction. This value is listed in the "PRIMARY CHARACTERISTICS" table and confirmed in the "ELECTRICAL CHARACTERISTICS" table for SMA5J33CA in the Vishay datasheet. The SMA5J33CAHE3_A/I holds this rating across its full operating temperature range.
How does the SMA5J33CAHE3_A/I differ from the unidirectional SMA5J33AHE3_A/I?
The SMA5J33CAHE3_A/I is bidirectional (denoted by "CA"), providing symmetrical clamping in both directions, whereas the SMA5J33AHE3_A/I is unidirectional ("A") with a defined cathode band and forward voltage drop (~3.5 V at 25 A). The SMA5J33CAHE3_A/I has no forward conduction path and is used where polarity is undefined or alternating - e.g., CAN bus, audio lines, or AC sensors - unlike the unidirectional version intended for DC rail protection.
SMA5J33CAHE3_A/I 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:
- -
- 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_A/I FAQ
1.How can I place an order for SMA5J33CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33CAHE3_A/I 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_A/I reliable?
The price and inventory of SMA5J33CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J33CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33CAHE3_A/I?
SMA5J33CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33CAHE3_A/I 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_A/I?
For technical support, including SMA5J33CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33CAHE3_A/I requirements.
6.How does Aetrix verify that SMA5J33CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J33CAHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J33CAHE3_A/I?
All SMA5J33CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33CAHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for SMA5J33CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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