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Vishay General Semiconductor - Diodes Division SMA5J33CAHM3_A/H
- Part No.:
- SMA5J33CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33CAHM3_A/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,219
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Product details
Overview
SMA5J33CAHM3_A/H 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, and operates from –55 °C to +150 °C - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J33CAHM3_A/H datasheet, SMA5J33CAHM3_A/H pinout, SMA5J33CAHM3_A/H application, or SMA5J33CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (via HM3 suffix), halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device functions as a voltage-clamped crowbar during transient events, responding in sub-nanosecond time with symmetrical conduction in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and robust surge handling up to 9.4 A (10/1000 µs waveform) while maintaining thermal resistance of 25 °C/W (junction-to-lead).
The SMA5J33CAHM3_A/H is rated for non-repetitive surge conditions per ANSI/IEEE C62.35, with derating above 25 °C per Fig. 2 and validated operation under MSL Level 1 (260 °C peak reflow). Its halogen-free, RoHS-compliant HM3 suffix confirms AEC-Q101 qualification and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on during overvoltage transients. |
| VC @ IPPM | 53.3 V at 9.4 A - Clamped voltage during 500 W surge event; determines maximum stress imposed on downstream ICs. |
| PPPM | 500 W (10/1000 µs) - Peak surge power rating defining energy-handling capacity for lightning and ESD-like waveforms. |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive and high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; optimized for pick-and-place and thermal pad layout. |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant - Meets automotive reliability and environmental requirements without lead or brominated flame retardants. |
Pinout & Package
Two-terminal bidirectional device in SMA (DO-214AC) package; no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102, with cathode band omitted per bidirectional design convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts equally in either direction when VRM exceeds VBR. |
| Case (exposed metal slug) | Thermal conduction path | Integral heat-sinking surface; requires minimum 5.0 mm × 5.0 mm copper pad per terminal for rated 500 W dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 500 W peak pulse power | Handles ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without degradation. |
| AEC-Q101 qualification (HM3) | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Low incremental surge resistance | Minimizes clamping overshoot and improves protection margin for sensitive 3.3 V/5 V logic interfaces. |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensor outputs from load dump and inductive switching transients in 12 V vehicle subsystems. IC Role / Device Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to limit transient excursions. Use Value: Maintains signal integrity below 53.3 V clamping level during 9.4 A surges, preventing latch-up or damage to 3.3 V microcontrollers. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers against field wiring faults and EFT bursts. IC Role / Device Role: Parallel-connected TVS across input terminals to shunt surge energy before reaching precision op-amp front-end. Use Value: Withstands repeated 500 W transients without parameter drift, supporting >10-year field deployment in factory automation. |
| Telecom Line Card Protection | Consumer Power Adapter Output |
Use Scenario: Shielding Ethernet PHY magnetics and PoE interface circuitry from induced surges on outdoor cabling. IC Role / Device Role: Secondary-level protector after gas discharge tube (GDT), clamping residual transients to safe levels. Use Value: Fast response (<1 ns) and symmetrical VBR ensure balanced protection on twisted-pair lines without skew or common-mode imbalance. |
Use Scenario: Adding secondary overvoltage suppression on DC output rails of wall-mounted AC/DC adapters for USB-C PD devices. IC Role / Device Role: Final-stage clamp between VOUT and GND to prevent output overvoltage from regulator failure or feedback loss. Use Value: 33 V VWM aligns with 24 V adapter outputs; halogen-free HM3 suffix meets global eco-regulatory requirements for consumer goods. |
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/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Restricted to commercial-grade industrial or consumer use where automotive reliability is not required. | Select when cost sensitivity outweighs halogen-free or automotive qualification needs. |
| SMBJ33CA | Same VWM/VC, but lower PPPM (600 W vs. 500 W); larger SMB (DO-214AA) package (5.3 mm × 4.1 mm). | Higher surge margin but incompatible with dense layouts requiring SMA footprint. | Choose only if board space allows SMB and higher 600 W rating is critical for legacy system redesigns. |
Compared with SMA5J33CAHE3_A/H and SMBJ33CA, the SMA5J33CAHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and SMA footprint - making it the sole option for new automotive designs requiring full compliance without layout revision.
Availability
SMA5J33CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O conditioning, and telecom line card surge hardening requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMA5J33CAHM3_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, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive-grade validation.
The SMA5J series delivers high-power-density TVS protection in compact surface-mount packages, engineered specifically for harsh-environment applications including automotive powertrain, ADAS, and industrial control systems.
FAQ
What is the clamping voltage of the SMA5J33CAHM3_A/H at its rated peak pulse current?
The SMA5J33CAHM3_A/H clamps to 53.3 V at its specified peak pulse current of 9.4 A (10/1000 µs waveform). This value is measured under standardized test conditions with the device mounted on 5.0 mm × 5.0 mm copper pads per terminal, and defines the maximum voltage seen by protected circuitry during a full-rated surge event. The SMA5J33CAHM3_A/H maintains this clamping performance across its qualified operating temperature range of –55 °C to +150 °C.
Is the SMA5J33CAHM3_A/H suitable for automotive applications?
Yes, the SMA5J33CAHM3_A/H is explicitly qualified to AEC-Q101 standards, as confirmed by its HM3 suffix and documentation in Vishay's 88875 datasheet. It supports automotive use cases including engine control units, body electronics, and ADAS sensor interfaces. The SMA5J33CAHM3_A/H also meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow requirements, making it suitable for under-hood and chassis-mounted deployments.
How does the HM3 suffix differ from the HE3 suffix in the SMA5J33CAHM3_A/H part number?
The HM3 suffix in SMA5J33CAHM3_A/H denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas HE3 indicates RoHS-compliant and AEC-Q101-qualified but not halogen-free. Both meet automotive reliability standards, but SMA5J33CAHM3_A/H satisfies stricter environmental mandates such as China RoHS II and EU EcoDesign requirements where brominated flame retardants are prohibited. The SMA5J33CAHM3_A/H shares identical electrical specifications with HE3 variants.
What is the maximum reverse leakage current for the SMA5J33CAHM3_A/H at its stand-off voltage?
The SMA5J33CAHM3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 33 V stand-off voltage (VWM), tested at 25 °C ambient. This low leakage ensures minimal power loss and signal interference in always-on monitoring circuits, such as automotive battery-supplied sensor nodes. Leakage remains within specification across the full –55 °C to +125 °C operating range per Vishay's characterization data.
Can the SMA5J33CAHM3_A/H be used in bidirectional signal line protection?
Yes, the SMA5J33CAHM3_A/H is a bidirectional TVS diode, explicitly designed for symmetric transient suppression on AC-coupled, differential, or floating signal paths. Its CA suffix confirms bidirectional functionality, and electrical characteristics-including VBR, VC, and IPPM-apply identically in both directions. The SMA5J33CAHM3_A/H has no polarity marking and requires no orientation during placement, simplifying layout and assembly for RS-485, CAN, or audio line protection.
SMA5J33CAHM3_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:
- -
- 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/H FAQ
1.How can I place an order for SMA5J33CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33CAHM3_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 SMA5J33CAHM3_A/H reliable?
The price and inventory of SMA5J33CAHM3_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 SMA5J33CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J33CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33CAHM3_A/H?
SMA5J33CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33CAHM3_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 SMA5J33CAHM3_A/H?
For technical support, including SMA5J33CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33CAHM3_A/H requirements.
6.How does Aetrix verify that SMA5J33CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J33CAHM3_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 SMA5J33CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J33CAHM3_A/H?
All SMA5J33CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33CAHM3_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 SMA5J33CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMA5J33CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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