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Vishay General Semiconductor - Diodes Division SMAJ5.0AHM3/I
- Part No.:
- SMAJ5.0AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0AHM3/I.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,097
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Product details
Overview
SMAJ5.0AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for primary overvoltage protection of 5.0 V DC power rails and I/O lines. It features a 6.40–7.07 V breakdown voltage at 10 mA, clamps transients to ≤9.2 V at 43.5 A peak pulse current, and delivers 400 W peak pulse power with 10/1000 μs waveform - used in automotive ECUs, industrial sensor interfaces, and USB power input stages.
For engineers reviewing the SMAJ5.0AHM3/I datasheet, SMAJ5.0AHM3/I pinout, SMAJ5.0AHM3/I application, or SMAJ5.0AHM3/I equivalent, key selection criteria include its 5.0 V stand-off voltage, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.33), and compatibility with automated SMT assembly on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation with ≤800 μA leakage at 5.0 V, then rapidly avalanches when transient voltage exceeds 6.40 V to limit downstream voltage to ≤9.2 V. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMA package supports high surge current handling without thermal runaway under repetitive 0.01% duty cycle pulses.
Designed for board-level ESD and surge immunity per IEC 61000-4-2 (±30 kV contact) and IEC 61000-4-5 (400 W, 10/1000 μs), it integrates into DC power entry, CAN/LIN bus lines, and microcontroller GPIO protection where low capacitance (<100 pF at 0 V) and minimal forward voltage drop (3.5 V at 25 A) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 5.0 V - maximum continuous reverse operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 6.40–7.07 V at 10 mA - precise avalanche onset range defining clamping threshold |
| Clamping Voltage (VC) | ≤9.2 V at 43.5 A IPPM - limits transient voltage seen by protected ICs during 10/1000 μs surge |
| Peak Pulse Power (PPPM) | 400 W - sustains 10/1000 μs surges without failure when mounted on 5.0 mm × 5.0 mm copper pads |
| Leakage Current (ID) | ≤800 μA at 5.0 V - ensures negligible standby power loss in always-on 5 V systems |
| Junction Temperature Range | −55 °C to +150 °C - enables use in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, single-ended unidirectional configuration with cathode band marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected line (e.g., 5 V supply rail or signal trace); conducts during forward surge |
| Cathode | Output/Load side | Connected to ground or low-impedance return path; defines polarity and clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 5 V rails without derating |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-20D; suitable for green manufacturing and export compliance |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on downstream 5 V logic, reducing risk of latch-up or gate oxide damage |
| Fast response time (<1 ns) | Clamps ESD events before propagation to sensitive CMOS inputs, meeting IEC 61000-4-2 ±30 kV contact discharge |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Transceiver Protection |
|---|---|
Use Scenario: Protecting 5 V power input of BCM microcontrollers from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery feed and LDO input. Use Value: Limits voltage to ≤9.2 V during 400 W surges, preventing brownout reset or internal regulator damage. |
Use Scenario: Safeguarding RS-485 transceiver VCC pins against induced surges on long cable runs in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5 V supply rail upstream of isolated DC/DC converter. Use Value: Maintains <800 μA leakage at 5 V, avoiding quiescent current penalty while clamping to safe levels. |
| USB Type-A Power Input Stage | Smart Home Sensor Node Power Rail |
Use Scenario: Guarding 5 V USB power input of smart speaker control boards against hot-plug transients and ESD. IC Role / Device Role / Timing Role: First-line TVS on VBUS line, positioned before USB PD controller and load switch. Use Value: Responds in <1 ns to meet IEC 61000-4-2 Level 4 (±15 kV air), preserving USB enumeration integrity. |
Use Scenario: Securing 5 V supply to Zigbee/BLE SoCs in battery-powered occupancy sensors exposed to HVAC-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on main power rail, co-located with ceramic bulk capacitor. Use Value: Operates from −55 °C to +150 °C, ensuring reliability in attic-mounted installations with wide ambient swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0AHE3/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Acceptable for commercial/industrial use where automotive reliability is not required | Select when cost sensitivity outweighs halogen-free or automotive qualification needs |
| SMBJ5.0A-M3 | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; same VWM/VBR/VC specs | Better suited for higher-energy surges; requires larger PCB footprint and different pad layout | Choose when system-level surge testing exceeds 400 W or thermal margin is constrained |
Compared with SMAJ5.0AHM3/I, SMAJ5.0AHE3/I offers identical clamping performance without halogen-free or AEC-Q101 assurance, while SMBJ5.0A-M3 provides 50 % higher surge capacity at the cost of increased size and layout redesign - making SMAJ5.0AHM3/I optimal for space-constrained automotive modules needing full qualification.
Availability
SMAJ5.0AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and USB power input protection requiring stable component supply across extended production lifecycles.
Supply support for SMAJ5.0AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMAJ series is engineered for board-level transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, high surge capability, and qualification rigor are mandatory.
FAQ
What is the clamping voltage of SMAJ5.0AHM3/I at its rated peak pulse current?
The SMAJ5.0AHM3/I clamps to a maximum of 9.2 V at its specified peak pulse current of 43.5 A (10/1000 μs waveform). This value is measured under standardized test conditions with the device mounted on 0.2" × 0.2" copper pads, and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ5.0AHM3/I maintains this clamping performance across its operational temperature range.
Is SMAJ5.0AHM3/I suitable for automotive applications?
Yes, SMAJ5.0AHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability validation. It meets stress tests including high-temperature reverse bias, temperature cycling, and surge endurance - making SMAJ5.0AHM3/I appropriate for engine control units, body electronics, and ADAS power domains where qualification is mandatory.
How does the leakage current of SMAJ5.0AHM3/I affect low-power designs?
SMAJ5.0AHM3/I exhibits ≤800 μA maximum reverse leakage current at its 5.0 V stand-off voltage and 25 °C, rising predictably with temperature but remaining below 5 mA up to 125 °C. In battery-powered or energy-harvesting systems, this leakage is negligible compared to typical MCU sleep currents (nA–μA range), ensuring SMAJ5.0AHM3/I does not compromise system standby efficiency.
What is the thermal resistance of SMAJ5.0AHM3/I, and how does it impact PCB layout?
SMAJ5.0AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To sustain 400 W peak pulses without exceeding 150 °C junction temperature, the datasheet specifies mounting on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Reducing pad area increases thermal impedance and risks thermal runaway during repetitive surges - so SMAJ5.0AHM3/I layout must follow recommended copper pour guidelines.
Can SMAJ5.0AHM3/I be used in bidirectional signal line protection?
No, SMAJ5.0AHM3/I is a unidirectional TVS diode, identifiable by its cathode band marking and specified only for reverse-biased operation. For bidirectional protection (e.g., RS-485 differential pairs or AC-coupled data lines), a bidirectional variant such as SMAJ5.0CA must be selected - SMAJ5.0AHM3/I would conduct continuously in forward bias on negative transients, causing failure. Always verify polarity alignment before placing SMAJ5.0AHM3/I in circuit.
SMAJ5.0AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ5.0AHM3/I FAQ
1.How can I place an order for SMAJ5.0AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0AHM3/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 SMAJ5.0AHM3/I reliable?
The price and inventory of SMAJ5.0AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0AHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ5.0AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0AHM3/I?
SMAJ5.0AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0AHM3/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 SMAJ5.0AHM3/I?
For technical support, including SMAJ5.0AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0AHM3/I requirements.
6.How does Aetrix verify that SMAJ5.0AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0AHM3/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 SMAJ5.0AHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ5.0AHM3/I?
All SMAJ5.0AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0AHM3/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 SMAJ5.0AHM3/I part is unused and in its original packaging.
Return procedure for SMAJ5.0AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0AHM3/I Tags
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