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Vishay General Semiconductor - Diodes Division SMA5J33HE3/61
- Part No.:
- SMA5J33HE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33HE3/61.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,296
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Product details
Overview
SMA5J33HE3/61 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. It features 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 µs), 9.4 A peak pulse current (IPPM), and clamps to ≤53.3 V at rated surge. Used in automotive ECUs to protect 24 V supply inputs against ISO 7637-2 load dump transients.
For engineers reviewing the SMA5J33HE3/61 datasheet, SMA5J33HE3/61 pinout, SMA5J33HE3/61 application, or SMA5J33HE3/61 equivalent, key selection criteria include its AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, RoHS-compliant matte tin terminals, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, conducting only during reverse-biased overvoltage events above its VBR threshold while remaining high-impedance under normal 33 V DC operation. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns).
Thermal performance is defined by RθJA = 80 °C/W (typ.) and RθJL = 25 °C/W (typ.), enabling reliable operation up to 150 °C junction temperature when mounted per recommended pad layout. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit's nominal DC rail. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown range ensures predictable turn-on margin above VWM with minimal tolerance spread. |
| IPPM | 9.4 A (10/1000 µs) - Peak surge current capability defines maximum transient energy absorption without failure. |
| VC | ≤53.3 V - Clamping voltage at IPPM; determines maximum stress imposed on downstream ICs during surge event. |
| PPPM | 500 W - Peak pulse power rating quantifies single-event surge handling capacity under standardized waveform. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive environments with minimal derating. |
| Leakage (ID) | ≤1.0 µA at VWM - Ultra-low reverse leakage prevents parasitic loading of sensitive 33 V sensor or control circuits. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating; cathode indicated by band on body; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded end is opposite) | Connected to system ground or lower-potential node; current flows anode-to-cathode during forward surge (e.g., IFSM = 40 A half-sine). |
| Cathode | Reverse-biased clamping terminal | Banded end connects to protected line (e.g., 33 V rail); conducts avalanche current when transient exceeds VBR, clamping voltage to ≤53.3 V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC standard. |
| Glass passivated junction | Ensures stable VBR tolerance, low leakage, and long-term parameter stability under thermal stress and humidity exposure. |
| Low profile DO-214AC package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment and reflow profiles (MSL Level 1, 260 °C peak). |
| 500 W peak pulse power | Supports robust protection against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges in 24 V systems. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, critical for long-life automotive and industrial applications. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply input of engine control unit (ECU) against ISO 7637-2 load dump transients up to 60 V/100 ms. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤53.3 V, preventing damage to downstream 33 V-rated regulators and microcontrollers. | Use Scenario: Safeguarding analog output line of pressure sensor in factory automation PLC module exposed to relay coil switching noise. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between sensor output and ground, absorbing inductive kickback spikes. Use Value: Maintains signal integrity with <1.0 µA leakage at 33 V, ensuring sub-mV offset error in 12-bit ADC measurements. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding 33 V PoE-powered switch port from lightning-induced surges coupled via Ethernet magnetics. IC Role / Device Role / Timing Role: Primary surge suppression stage on DC input before EMI filter and secondary TVS array. Use Value: Absorbs 500 W peak energy without degradation, preserving MTBF of telecom infrastructure hardware. | Use Scenario: Suppressing back-EMF from brushed DC motor in smart washing machine control board during commutation. IC Role / Device Role / Timing Role: Unidirectional clamp across motor terminals referenced to chassis ground. Use Value: Withstands 40 A non-repetitive forward surge (IFSM), preventing MOSFET gate oxide rupture during stall conditions. |
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-E3/61 | Same electrical specs (VWM = 33 V, VC ≤53.3 V), but commercial-grade (non-AEC-Q101), JESD 201 Class 1A whisker test. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMA5J33A-E3/61 if cost sensitivity outweighs automotive reliability requirements and no under-hood deployment is planned. |
| SMC5J33AHE3/61 | Same VWM/VC, but in larger DO-214AB (SMC) package; higher thermal mass yields RθJA = 35 °C/W (vs. 80 °C/W) and IPPM = 32.5 A. | Offers superior surge handling and thermal dissipation, but requires larger PCB footprint and may not fit space-constrained automotive modules. | Choose SMC5J33AHE3/61 when surge duty cycle or ambient temperature exceeds SMA5J33HE3/61 limits, and board area permits larger package. |
Compared with SMA5J33A-E3/61, the SMA5J33HE3/61 adds AEC-Q101 qualification and enhanced whisker resistance for automotive use; versus SMC5J33AHE3/61, it trades surge margin and thermal performance for compact DO-214AC footprint-ideal for space-limited ECU designs requiring certified reliability.
Availability
SMA5J33HE3/61 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA5J33HE3/61 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 density, and automotive-grade qualification.
The SMA5J series is engineered specifically for high-power-density transient suppression in harsh environments, targeting AEC-Q101-compliant automotive, industrial, and telecom applications where compact size and robust surge immunity are critical.
FAQ
What is the clamping voltage of the SMA5J33HE3/61 under maximum rated surge current?
The SMA5J33HE3/61 clamps to a maximum of 53.3 V when subjected to its rated 9.4 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C with devices mounted on 5.0 mm × 5.0 mm copper pads per Vishay specification. The SMA5J33HE3/61 maintains this clamping performance across its full operating temperature range, making it suitable for protecting 33 V systems against transient overvoltages.
Is the SMA5J33HE3/61 suitable for automotive applications?
Yes, the SMA5J33HE3/61 is explicitly AEC-Q101 qualified, with validation covering temperature cycling, humidity bias, mechanical shock, and board flex tests required for automotive under-hood and cabin electronics. Its HE3 suffix denotes AEC-Q101 compliance and JESD 201 Class 2 whisker resistance-key requirements for engine control units, body controllers, and ADAS modules. The SMA5J33HE3/61 meets these standards without derating at junction temperatures up to +150 °C.
What does the 'HE3' suffix indicate in SMA5J33HE3/61?
The 'HE3' suffix in SMA5J33HE3/61 signifies two critical qualifications: RoHS compliance (per Directive 2011/65/EU) and AEC-Q101 certification for automotive use. Additionally, 'HE3' denotes that the matte tin-plated leads meet JESD 201 Class 2 whisker resistance testing-more stringent than the Class 1A requirement of the 'E3' suffix. This makes the SMA5J33HE3/61 appropriate for long-life, high-reliability deployments where tin whisker formation could cause field failures.
How does the SMA5J33HE3/61 compare to bi-directional TVS diodes like SMA5J33CA?
The SMA5J33HE3/61 is unidirectional and intended for DC rail protection where polarity is fixed (e.g., 33 V supply to ground), offering lower leakage (<1.0 µA) and higher surge current capability in the forward direction (IFSM = 40 A). In contrast, SMA5J33CA is bi-directional, suited for AC or floating signal lines, but exhibits doubled leakage for VWM ≤10 V and lacks forward surge rating. The SMA5J33HE3/61 is not interchangeable with SMA5J33CA without circuit redesign due to polarity dependency.
What is the recommended PCB pad layout for optimal thermal performance of the SMA5J33HE3/61?
Vishay specifies mounting the SMA5J33HE3/61 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 500 W pulse power and thermal resistance values (RθJA = 80 °C/W). Reducing pad size increases junction temperature rise during surge events and risks parametric shift or failure. The SMA5J33HE3/61 datasheet provides exact DO-214AC outline dimensions and recommends minimum 1.52 mm lead length for mechanical stress relief-critical for automotive vibration environments.
SMA5J33HE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- 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)
SMA5J33HE3/61 FAQ
1.How can I place an order for SMA5J33HE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33HE3/61 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 SMA5J33HE3/61 reliable?
The price and inventory of SMA5J33HE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33HE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J33HE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33HE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33HE3/61?
SMA5J33HE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33HE3/61 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 SMA5J33HE3/61?
For technical support, including SMA5J33HE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33HE3/61 requirements.
6.How does Aetrix verify that SMA5J33HE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J33HE3/61 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 SMA5J33HE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J33HE3/61?
All SMA5J33HE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33HE3/61, 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 SMA5J33HE3/61 part is unused and in its original packaging.
Return procedure for SMA5J33HE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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