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Vishay General Semiconductor - Diodes Division SMA5J33CAHM3_A/I
- Part No.:
- SMA5J33CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33CAHM3_A/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,841
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Product details
Overview
SMA5J33CAHM3_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 signal and power lines. It features a 33 V stand-off 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 IPPM, and operates from –55 °C to +150 °C - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J33CAHM3_A/I datasheet, SMA5J33CAHM3_A/I pinout, SMA5J33CAHM3_A/I application, or SMA5J33CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device is a glass-passivated, junction-based TVS diode optimized for fast response (<1 ns) to ESD and lightning-induced transients. Its bidirectional architecture enables symmetrical clamping across both polarities without external polarity management, supporting robust protection in AC-coupled or floating signal paths.
Rated for 500 W peak pulse power under standardized 10/1000 µs waveform, it delivers low incremental surge resistance and stable clamping performance up to TJ = 150 °C. The SMA (DO-214AC) package supports MSL Level 1 handling and 260 °C reflow peak temperature per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - ensures reliable breakdown onset within defined tolerance band |
| VC @ IPPM | 53.3 V at 9.4 A - clamping voltage during full-rated 500 W surge, limiting downstream stress |
| PPPM | 500 W (10/1000 µs) - defines maximum single-event transient energy absorption capability |
| TJ range | –55 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
| RθJA | 80 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant - meets automotive reliability and environmental requirements |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; bidirectional conduction enables clamp-on-both-polarity behavior |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bidirectional construction; no cathode/anode orientation required in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or floating nodes without polarity constraints |
| 500 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly mounted on recommended pad layout |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS | Meets global environmental compliance mandates without compromising surge performance or thermal stability |
| MSL Level 1 | Allows unlimited floor life and standard reflow profile (260 °C peak), simplifying SMT manufacturing integration |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector interface or IC pin. Use Value: Limits transient voltage to ≤53.3 V during 500 W surges, preserving signal integrity and preventing latch-up in automotive-grade microcontrollers. |
Use Scenario: Safeguarding 24 V DC digital input modules against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input channel before optocoupler or Schmitt trigger. Use Value: Withstands repeated 10/1000 µs transients up to 9.4 A while maintaining <1 µA leakage at 33 V, ensuring low false-trigger risk. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pair, coordinated with primary GDT or MOV. Use Value: Fast <1 ns response and symmetrical clamping reduce differential skew and preserve signal timing margins in high-speed links. |
Use Scenario: Input-stage surge suppression on 5–24 V DC power rails of smart home hubs and USB-C PD adapters. IC Role / Device Role / Timing Role: Final-clamp device after bulk filtering, absorbing residual transients missed by upstream components. Use Value: Halogen-free construction meets IEC 62368-1 flame-retardancy requirements while delivering 53.3 V clamping at 9.4 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33CAHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks HM3 suffix designation | Approved for commercial-grade automotive use but not certified for halogen-free supply chains | Select when halogen-free requirement is not mandated and cost optimization is prioritized |
| SMA6J33CA-M3/5A | Higher PPPM (600 W), larger SMA package variant (DO-214AC same footprint), higher IPPM (11.3 A) | Used where system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires margin headroom | Choose when design requires >500 W surge margin and board space allows same-footprint upgrade |
Compared with SMA5J33CAHM3_A/I, SMA5J33CAHE3_A/I offers identical clamping and thermal performance but omits halogen-free certification, while SMA6J33CA-M3/5A provides 20 % higher surge power rating in the same footprint - enabling direct layout reuse with enhanced robustness.
Availability
SMA5J33CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and consumer power adapter ESD protection requiring stable component supply and long-term lifecycle support.
Supply support for SMA5J33CAHM3_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 and application-specific performance.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems needing AEC-Q101-qualified, halogen-free TVS solutions.
FAQ
What is the clamping voltage of SMA5J33CAHM3_A/I at its rated peak pulse current?
The SMA5J33CAHM3_A/I has a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPPM) of 9.4 A under the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and reflects the upper limit of voltage seen by protected circuitry during a full 500 W transient event. The SMA5J33CAHM3_A/I maintains this clamping performance across its operational temperature range.
Is SMA5J33CAHM3_A/I suitable for automotive applications?
Yes, SMA5J33CAHM3_A/I is AEC-Q101 qualified and specifically designated for automotive use via the HM3 suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It is validated for under-hood and cabin applications including sensor interfaces, body control modules, and infotainment power rails - meeting stringent reliability, thermal, and surge immunity requirements defined in the standard.
Does SMA5J33CAHM3_A/I have polarity markings?
No, SMA5J33CAHM3_A/I does not feature a cathode band or other polarity marking because it is a bidirectional TVS diode. Both terminals are functionally identical, allowing symmetrical placement on PCBs without orientation concerns. This eliminates assembly errors and simplifies layout for AC-coupled or floating signal paths where polarity reversal may occur.
What is the thermal resistance of SMA5J33CAHM3_A/I, and how is it measured?
The SMA5J33CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W, measured with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per JEDEC standards. This value assumes still air conditions and defines the temperature rise above ambient per watt of steady-state power dissipation - critical for derating under repetitive surge conditions.
How does SMA5J33CAHM3_A/I differ from unidirectional variants like SMA5J33A?
SMA5J33CAHM3_A/I is bidirectional with symmetrical clamping in both directions and no polarity marking, whereas SMA5J33A is unidirectional, features a cathode band, and conducts only in reverse bias. The "CA" suffix denotes bidirectionality; SMA5J33CAHM3_A/I also carries AEC-Q101 qualification and halogen-free compliance not guaranteed in all unidirectional versions. Clamping behavior, VWM, and PPPM remain identical between counterparts.
SMA5J33CAHM3_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:
- 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)
SMA5J33CAHM3_A/I FAQ
1.How can I place an order for SMA5J33CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33CAHM3_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 SMA5J33CAHM3_A/I reliable?
The price and inventory of SMA5J33CAHM3_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 SMA5J33CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J33CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33CAHM3_A/I?
SMA5J33CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33CAHM3_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 SMA5J33CAHM3_A/I?
For technical support, including SMA5J33CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33CAHM3_A/I requirements.
6.How does Aetrix verify that SMA5J33CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J33CAHM3_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 SMA5J33CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J33CAHM3_A/I?
All SMA5J33CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33CAHM3_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 SMA5J33CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMA5J33CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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