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Vishay General Semiconductor - Diodes Division SMA5J33AHM3/H
- Part No.:
- SMA5J33AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33AHM3/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,381
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Product details
Overview
SMA5J33AHM3/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 standoff voltage (VWM), 36.7–40.6 V breakdown range (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. It is halogen-free, RoHS-compliant, and AEC-Q101 qualified-used in automotive power rail and sensor interface protection.
For engineers reviewing the SMA5J33AHM3/H datasheet, SMA5J33AHM3/H pinout, SMA5J33AHM3/H application, or SMA5J33AHM3/H equivalent, this page delivers verified electrical parameters, thermal derating behavior, junction-to-lead resistance, polarity marking convention, and AEC-Q101 qualification status critical for automotive-grade design-in and reliability validation.
Technical Context
This TVS diode operates as a clamping device triggered by reverse-biased avalanche breakdown above VWM, with fast response time (<1 ns) and low incremental surge resistance enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes. Its glass-passivated junction ensures stable leakage and long-term reliability under repeated surge stress.
Thermal performance is defined by RθJL = 25 °C/W (junction-to-lead) and RθJA = 80 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm copper pads), supporting operation up to TJ = 150 °C. The cathode band marking identifies polarity for unidirectional conduction and proper PCB orientation during automated placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin for protected circuit. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | ≤53.3 V at 9.4 A (10/1000 µs) - Clamped voltage seen by downstream IC/MOSFET during worst-case surge; determines system overvoltage margin. |
| PPPM | 500 W - Peak surge energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance when properly laid out. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); validates robustness against accidental reverse polarity or latch-up events. |
| TJ max. | 150 °C - Maximum junction temperature; enables use in under-hood automotive environments with validated thermal pad layout. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 and JESD 201 Class 2 whisker resistance. Cathode indicated by black band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (non-marked end) | Connected to lower-potential side (e.g., GND or return path); conducts during forward surge or fault conditions. |
| Cathode | Avalanche clamping terminal (banded end) | Connected to higher-potential line (e.g., 33 V rail or signal input); initiates clamping when reverse voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports green manufacturing and end-of-life compliance. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow without moisture sensitivity concerns; eliminates pre-bake requirement in SMT line. |
| Low Rsurge and fast response | Minimizes voltage overshoot during sub-100 ns transients (e.g., ISO 7637-2 pulse 1/2a/5a); protects sensitive gate oxides and analog front-ends. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 33 V supply rails in engine control modules (ECMs) and transmission control units (TCUs) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery feed and LDO/regulator input to limit transient overvoltage. Use Value: Withstands 500 W surges and clamps to ≤53.3 V, ensuring downstream regulators remain within absolute maximum ratings during ISO 16750-2 load dump events. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation systems from EFT and surge coupling on 24 V loop-powered lines. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at connector entry point to shunt transients before reaching precision ADC or op-amp input stages. Use Value: 33 V VWM provides headroom above nominal 24 V operation while maintaining <1 µA leakage at full temperature range, preserving measurement accuracy. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
|
Use Scenario: Safeguarding primary-side inputs of telecom power supplies (e.g., PoE injectors) against lightning-induced surges on -48 V or +24 V distribution lines. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input bus, coordinated with upstream fuses and secondary-stage MOVs for staged protection. Use Value: 500 W PPPM and 150 °C TJ max enable sustained operation in enclosed telecom cabinets with limited airflow and elevated ambient temperatures. |
Use Scenario: Adding robustness to DC barrel jack inputs of smart home hubs and set-top boxes subjected to user-insertion ESD and adapter swap transients. IC Role / Device Role / Timing Role: First-line TVS at board edge, placed before input capacitor and PMIC to absorb contact discharge before energy reaches power management IC. Use Value: SMA package allows compact placement near connector; AEC-Q101 qualification ensures long-term reliability even under repeated human-handling stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33AHE3/H | Same electrical specs and package; RoHS-compliant but not halogen-free; lacks HM3 material certification. | Approved for commercial/industrial use where halogen-free requirement is absent; not qualified for automotive under AEC-Q101. | Select SMA5J33AHE3/H only if halogen content and automotive qualification are not mandated by program specifications. |
| SMCJ33A | Higher PPPM = 1500 W, larger SMC (DO-214AB) package, same VWM/VC ratings; RθJA = 25 °C/W vs. 80 °C/W. | Used where higher surge margin or improved thermal dissipation is required; requires larger PCB footprint and different pad layout. | Choose SMCJ33A when system-level testing reveals insufficient margin with 500 W rating or when ambient temperature exceeds 105 °C. |
Compared with SMA5J33AHM3/H, SMA5J33AHE3/H offers identical clamping performance but omits halogen-free and AEC-Q101 assurance, while SMCJ33A trades compact size for 3× surge capacity and superior thermal conductivity-making each suitable for distinct reliability, space, and compliance tiers.
Availability
SMA5J33AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input protection requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for SMA5J33AHM3/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, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained, thermally demanding applications-including under-hood automotive systems and industrial control panels-where consistent clamping and long-term stability are mandatory.
FAQ
What is the clamping voltage of the SMA5J33AHM3/H at its rated peak pulse current?
The SMA5J33AHM3/H clamps to a maximum of 53.3 V when subjected to its rated peak pulse current of 9.4 A (10/1000 µs waveform). This value is measured under standardized test conditions per ANSI/IEEE C62.35 and is guaranteed across the full operating temperature range of -55 °C to +150 °C. The clamping voltage directly determines the overvoltage stress imposed on downstream components during surge events, making it a critical parameter for system-level protection design using the SMA5J33AHM3/H.
Is the SMA5J33AHM3/H suitable for automotive applications?
Yes, the SMA5J33AHM3/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation revision 09-Jan-2024. It undergoes stress testing for high-temperature operating life, temperature cycling, and surge robustness required for automotive powertrain, chassis, and body electronics. Its halogen-free composition and MSL Level 1 rating further support use in modern automotive manufacturing processes, distinguishing the SMA5J33AHM3/H from non-qualified variants.
How does the SMA5J33AHM3/H differ from the SMA5J33A-E3/61?
The SMA5J33AHM3/H differs from SMA5J33A-E3/61 in three key aspects: (1) HM3 denotes halogen-free and AEC-Q101 qualification, whereas E3 indicates RoHS-compliant but halogen-containing commercial grade; (2) HM3 uses "H" package code for 7" tape-and-reel (1800 pcs), while E3/61 uses "61"; (3) HM3 has stricter material and reliability validation, making SMA5J33AHM3/H appropriate for automotive, unlike SMA5J33A-E3/61. Both share identical electrical specs and SMA package.
What is the thermal resistance from junction to lead (RθJL) for the SMA5J33AHM3/H?
The SMA5J33AHM3/H has a typical junction-to-lead thermal resistance (RθJL) of 25 °C/W, measured under standard conditions. This parameter reflects heat transfer efficiency from the silicon die to the soldered PCB pads via the leads and is critical for estimating temperature rise during repetitive surge events. Unlike RθJA (80 °C/W), RθJL is less dependent on board layout-making it a more reliable metric for thermal modeling in constrained or high-power-density designs using the SMA5J33AHM3/H.
Does the SMA5J33AHM3/H have polarity marking, and how is it oriented on the PCB?
Yes, the SMA5J33AHM3/H is unidirectional and marked with a cathode band-a black stripe located at one end of the SMA (DO-214AC) package body. During PCB layout, the banded end must be connected to the higher-potential node (e.g., 33 V rail), while the unmarked end connects to ground or return. This orientation ensures proper avalanche clamping during reverse transients; incorrect placement renders the device ineffective. The band position is standardized per DO-214AC mechanical drawings and verified in Vishay's package outline documentation for the SMA5J33AHM3/H.
SMA5J33AHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for SMA5J33AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33AHM3/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/H reliable?
The price and inventory of SMA5J33AHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMA5J33AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33AHM3/H?
SMA5J33AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33AHM3/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/H?
For technical support, including SMA5J33AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33AHM3/H requirements.
6.How does Aetrix verify that SMA5J33AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J33AHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMA5J33AHM3/H?
All SMA5J33AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33AHM3/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/H part is unused and in its original packaging.
Return procedure for SMA5J33AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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