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Vishay General Semiconductor - Diodes Division SMA5J33AHE3_A/H
- Part No.:
- SMA5J33AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33AHE3_A/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,403
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Product details
Overview
SMA5J33AHE3_A/H 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), 53.3 V clamping voltage at 9.4 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform. It is AEC-Q101 qualified and used to protect automotive sensor interfaces and industrial power rails against inductive switching transients.
For engineers reviewing the SMA5J33AHE3_A/H datasheet, SMA5J33AHE3_A/H pinout, SMA5J33AHE3_A/H application, or SMA5J33AHE3_A/H equivalent, key selection criteria include clamping performance under 10/1000 µs surges, AEC-Q101 qualification status, unidirectional polarity marking, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, activating when reverse voltage exceeds its breakdown threshold (VBR = 36.7–40.6 V) to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), critical for safeguarding MOSFET gates and microcontroller I/O pins.
Rated for 500 W peak pulse power (10/1000 µs), it sustains 9.4 A peak pulse current (IPPM) while clamping to ≤53.3 V - enabling robust protection of 3.3 V and 5 V logic systems without overvoltage stress. The device's RθJL = 25 °C/W and TJ(max) = 150 °C support reliable operation in thermally constrained automotive engine control units and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 33 V nominal supply rails. |
| VBR (min/max) | 36.7 V / 40.6 V - verified breakdown range at 1 mA test current; ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 53.3 V - clamping voltage at 9.4 A peak pulse current; limits downstream voltage stress during 10/1000 µs transients. |
| PPPM | 500 W - peak pulse power handling capability; supports protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges. |
| TJ(max) | +150 °C - maximum junction temperature; enables use in under-hood automotive environments and sealed industrial enclosures. |
| RθJA | 80 °C/W - thermal resistance junction-to-ambient on standard 5.0 mm × 5.0 mm pads; informs PCB thermal design for sustained surge duty cycles. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane; must be routed with minimal inductance to maintain clamping speed. |
| Cathode | Protected line connection / surge sink | Connected to protected node (e.g., 33 V rail or sensor output); band-marked end requires correct orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Glass-passivated junction | Ensures stable VBR tolerance and <1.0 µA leakage at VWM, critical for low-power always-on circuits. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., >1 kV/µs), improving protection margin for sensitive ICs. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates bake requirement prior to SMT processing. |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in vehicle ECUs. IC Role / Device Role: Unidirectional shunt TVS placed between signal line and chassis ground. Use Value: Clamps transients to ≤53.3 V while maintaining <1.0 µA leakage at 33 V, preserving signal integrity and preventing MCU input latch-up. |
Use Scenario: Safeguarding 33 V auxiliary power supplies in PLC modules and motor drive controllers against switching surges. IC Role / Device Role: Primary overvoltage clamp on DC input rail upstream of DC-DC converters. Use Value: Absorbs 500 W pulses without degradation, enabling compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) testing. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side surge suppression in 33 V USB PD or PoE-powered devices exposed to ESD and conducted noise. IC Role / Device Role: Final-stage protector after primary MOV and common-mode choke filtering. Use Value: Fast <1 ns response and low clamping voltage prevent damage to synchronous rectifiers and secondary-side controllers. |
Use Scenario: Overvoltage protection on 33 V bias rails feeding RF front-end amplifiers and optical transceivers in base station equipment. IC Role / Device Role: Standoff-rated shunt suppressor on regulated supply lines feeding sensitive analog components. Use Value: Stable 33 V VWM and tight VBR tolerance ensure no false triggering during normal 33 ±5 % regulation. |
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 SMAJ33A | Same SMA package, 33 V VWM, but lower PPPM = 400 W and higher VC = 53.3 V at 7.5 A; not AEC-Q101 qualified. | Acceptable for commercial-grade power supplies but unsuitable for automotive under-hood use due to missing qualification. | Select SMA5J33AHE3_A/H when AEC-Q101 compliance and 500 W surge capacity are required. |
| ON Semiconductor 1.5SMC33A | Same electrical specs (VWM = 33 V, VC = 53.3 V), but in larger SMC (DO-214AB) package; RθJA = 50 °C/W vs. 80 °C/W. | Better thermal performance but incompatible with space-constrained layouts designed for SMA footprint. | Choose SMA5J33AHE3_A/H for high-density automotive PCBs where DO-214AC size and AEC-Q101 are mandatory. |
Compared with SMAJ33A and 1.5SMC33A, SMA5J33AHE3_A/H uniquely combines AEC-Q101 qualification, 500 W rating in the compact SMA package, and validated 33 V system-level protection - making it the preferred choice for automotive and space-limited industrial designs requiring certified reliability.
Availability
SMA5J33AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial power rail clamping, and telecom line interface protection requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMA5J33AHE3_A/H 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, and protection devices with emphasis on reliability, power density, and automotive-grade validation.
SMA5J33AHE3_A/H belongs to Vishay's TRANSZORB® high-power TVS family, engineered specifically for robust transient suppression in harsh environments such as automotive powertrain, industrial automation, and infrastructure equipment.
FAQ
What is the clamping voltage of the SMA5J33AHE3_A/H at its rated peak pulse current?
The SMA5J33AHE3_A/H clamps to a maximum of 53.3 V at its specified peak pulse current of 9.4 A under a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees predictable overvoltage limiting for downstream 33 V-rated components. The SMA5J33AHE3_A/H maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is the SMA5J33AHE3_A/H suitable for automotive applications?
Yes, the SMA5J33AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101-qualified construction. It is validated for under-hood and body electronics applications including engine control units, ADAS sensors, and infotainment power supplies. The SMA5J33AHE3_A/H meets MSL Level 1 and withstands reflow up to 260 °C.
What is the difference between SMA5J33AHE3_A/H and SMA5J33A-E3?
The SMA5J33AHE3_A/H includes AEC-Q101 qualification and uses the "HE3" suffix, whereas SMA5J33A-E3 is commercial-grade only (RoHS-compliant but not automotive-qualified). Both share identical electrical specs and SMA package, but only SMA5J33AHE3_A/H is approved for automotive production. The "_A/H" denotes revision A in 7" tape-and-reel packaging (1800 units).
Does the SMA5J33AHE3_A/H have bidirectional capability?
No, the SMA5J33AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix (vs. "CA" for bidirectional). It conducts only in reverse bias above VBR; forward conduction follows standard diode behavior with VF ≈ 3.5 V at 25 A. Bidirectional variants like SMA5J33CA are separate part numbers with symmetrical clamping in both polarities.
What is the thermal resistance of the SMA5J33AHE3_A/H in standard mounting conditions?
The SMA5J33AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in the Vishay datasheet. Its junction-to-lead resistance (RθJL) is 25 °C/W, supporting efficient heat transfer to PCB copper in high-surge-duty applications.
SMA5J33AHE3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J33AHE3_A/H FAQ
1.How can I place an order for SMA5J33AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33AHE3_A/H 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 SMA5J33AHE3_A/H reliable?
The price and inventory of SMA5J33AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J33AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33AHE3_A/H?
SMA5J33AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33AHE3_A/H 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 SMA5J33AHE3_A/H?
For technical support, including SMA5J33AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33AHE3_A/H requirements.
6.How does Aetrix verify that SMA5J33AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J33AHE3_A/H 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 SMA5J33AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J33AHE3_A/H?
All SMA5J33AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33AHE3_A/H, 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 SMA5J33AHE3_A/H part is unused and in its original packaging.
Return procedure for SMA5J33AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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