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Vishay General Semiconductor - Diodes Division SMA5J33AHM3_A/H
- Part No.:
- SMA5J33AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33AHM3_A/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,587
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Product details
Overview
SMA5J33AHM3_A/H from Vishay General Semiconductor is a unidirectional 500 W transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, with 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), and 53.3 V clamping voltage at 9.4 A peak pulse current. It protects MOSFETs and ICs against inductive switching transients in automotive power electronics.
For engineers reviewing the SMA5J33AHM3_A/H datasheet, SMA5J33AHM3_A/H pinout, SMA5J33AHM3_A/H application, or SMA5J33AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 µs surge, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), and halogen-free RoHS compliance per ordering suffix HM3.
Technical Context
This TVS diode uses a glass-passivated silicon junction for stable breakdown behavior and low incremental surge resistance. Its unidirectional polarity enables integration into DC power rails where reverse conduction must be blocked, and its MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device operates across –55 °C to +150 °C junction temperature range and delivers consistent clamping (VC = 53.3 V) at IPPM = 9.4 A with 10/1000 µs waveform. Its 0.064 g unit weight and DO-214AC footprint support high-density automated placement on automotive control modules.
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 breakdown range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 53.3 V - clamped voltage during 9.4 A 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 500 W - peak pulse power handling capability under standard transient waveform |
| RθJA | 80 °C/W - thermal resistance from junction to ambient on 5 mm × 5 mm copper pads, guiding heatsinking needs |
| TJ max | +150 °C - maximum allowable junction temperature, supporting under-hood automotive use |
| ID @ VWM | 1.0 μA - leakage current at stand-off voltage, minimizing standby power loss |
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 marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to ground or low-side return path; conducts only during forward surge events |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., 33 V rail); blocks normal operation, avalanches during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics per stress test requirements |
| Halogen-free & RoHS-compliant | Meets automotive environmental standards and end-of-life material restrictions |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without moisture-induced damage |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects microcontroller I/O and driver circuits from load-dump and inductive kickback in 12 V/24 V vehicle systems. IC Role / Device Role: Unidirectional TVS placed between supply rail and ground, clamping transients above 33 V. Use Value: Limits voltage seen by MCU to ≤53.3 V during 9.4 A surges, preventing latch-up or gate oxide damage. | Use Scenario: Shields 24 V digital input circuitry from field-wiring induced surges in factory automation cabinets. IC Role / Device Role: Standoff protector on optocoupler input side, absorbing energy from relay coil flyback. Use Value: Maintains <1.0 μA leakage at 24 V nominal, avoiding false triggering while surviving repeated 500 W pulses. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Driver Board |
Use Scenario: Guards AC-DC converter primary-side controller from lightning-induced surges on mains-connected inputs. IC Role / Device Role: Secondary-side clamp on DC bus after rectification, suppressing ringing and cross-talk. Use Value: Withstands 40 A IFSM (8.3 ms half-sine), enabling robustness against sustained overloads without degradation. | Use Scenario: Safeguards H-bridge gate drivers from back-EMF spikes generated by brushed DC motors in washing machines. IC Role / Device Role: Rail-to-rail TVS on motor supply line, positioned adjacent to driver IC power pins. Use Value: Delivers 53.3 V clamping at 9.4 A with RθJA = 80 °C/W, allowing thermal design within compact enclosure constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33AHE3_A/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial-grade industrial controls, not automotive-qualified designs | Select when halogen-free content or automotive qualification is not required |
| SMC5J33A | Larger SMC (DO-214AB) package; higher PPPM (1500 W); same VWM/VBR/VC specs | Used where higher surge margin or board-level mechanical robustness is prioritized over density | Choose for applications requiring >500 W pulse handling or legacy SMC footprint compatibility |
Compared with SMA5J33AHM3_A/H, SMA5J33AHE3_A/H offers identical electrical specs but omits halogen-free and AEC-Q101 compliance, while SMC5J33A provides triple the pulse power in a larger package-enabling trade-offs between board space, surge margin, and automotive qualification.
Availability
SMA5J33AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, and telecom power supply transient suppression requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMA5J33AHM3_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 and automotive-grade qualification.
The SMA5J series is designed specifically for high-power-density transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness and standardized packaging are critical.
FAQ
What is the clamping voltage of the SMA5J33AHM3_A/H under a 10/1000 µs surge?
The SMA5J33AHM3_A/H has a maximum clamping voltage (VC) of 53.3 V at 9.4 A peak pulse current under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMA5J33AHM3_A/H maintains this clamping performance across its rated operating temperature range.
Is the SMA5J33AHM3_A/H qualified for automotive applications?
Yes, the SMA5J33AHM3_A/H is AEC-Q101 qualified, as confirmed by the HM3 suffix in its ordering code. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. The SMA5J33AHM3_A/H is intended for use in automotive powertrain, body, and chassis modules where reliability under thermal and mechanical stress is mandatory.
What does the "HM3" suffix indicate in SMA5J33AHM3_A/H?
The "HM3" suffix in SMA5J33AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only) and HE3 (RoHS + AEC-Q101, not halogen-free). The "_A/H" indicates revision level A and tape-and-reel packaging in 7-inch reels (1800 units per reel). The SMA5J33AHM3_A/H meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability standards.
How does the thermal resistance of SMA5J33AHM3_A/H affect PCB layout?
The SMA5J33AHM3_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. To maintain TJ ≤ 150 °C under worst-case 500 W pulses, designers must ensure adequate copper area and minimize trace length to ground planes. The SMA5J33AHM3_A/H's DO-214AC footprint supports standard automated placement but requires adherence to Vishay's recommended pad layout for thermal and mechanical reliability.
Can SMA5J33AHM3_A/H replace SMA5J33A in an existing design?
SMA5J33AHM3_A/H is not a direct drop-in replacement for generic SMA5J33A due to differences in qualification and material content. While both share identical electrical specs and DO-214AC packaging, SMA5J33AHM3_A/H adds halogen-free composition and AEC-Q101 validation. Substitution requires verification of compliance requirements and thermal derating under actual board layout-SMA5J33AHM3_A/H may exhibit identical clamping but must be validated for automotive use cases where the base SMA5J33A is not qualified.
SMA5J33AHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J33AHM3_A/H FAQ
1.How can I place an order for SMA5J33AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33AHM3_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 SMA5J33AHM3_A/H reliable?
The price and inventory of SMA5J33AHM3_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 SMA5J33AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J33AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33AHM3_A/H?
SMA5J33AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33AHM3_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 SMA5J33AHM3_A/H?
For technical support, including SMA5J33AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33AHM3_A/H requirements.
6.How does Aetrix verify that SMA5J33AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J33AHM3_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 SMA5J33AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J33AHM3_A/H?
All SMA5J33AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33AHM3_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 SMA5J33AHM3_A/H part is unused and in its original packaging.
Return procedure for SMA5J33AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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