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Vishay General Semiconductor - Diodes Division SMAJ5.0AHM3_A/I
- Part No.:
- SMAJ5.0AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0AHM3_A/I.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,784
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Product details
Overview
SMAJ5.0AHM3_A/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 delivers 400 W peak pulse power (10/1000 μs), clamps transients to ≤9.2 V at 43.5 A, and features 6.40–7.07 V breakdown voltage at 10 mA test current with ±0.057 %/°C temperature coefficient.
For engineers reviewing the SMAJ5.0AHM3_A/I datasheet, SMAJ5.0AHM3_A/I pinout, SMAJ5.0AHM3_A/I application, or SMAJ5.0AHM3_A/I equivalent, key selection criteria include its 5.0 V stand-off voltage, 9.2 V maximum clamping voltage at rated surge current, AEC-Q101 qualification status, halogen-free RoHS-compliant construction, and suitability for automotive ECUs, industrial sensor interfaces, and USB/serial port ESD protection.
Technical Context
This TVS diode operates as a shunt-clamping device triggered by reverse-biased avalanche breakdown, responding in <1 ps to transient overvoltages. Its glass-passivated junction ensures stable leakage (<800 μA at 5.0 V) and low incremental surge resistance, enabling precise voltage limiting without parasitic conduction during normal operation.
The SMAJ5.0AHM3_A/I is rated for -55 °C to +150 °C junction temperature, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), and supports repetitive surge duty cycles up to 0.01 % under defined mounting conditions (0.2" × 0.2" copper pads).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 5.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 6.40–7.07 V at 10 mA - Confirmed avalanche onset range defining protection threshold accuracy |
| Clamping Voltage (VC) | 9.2 V at 43.5 A IPPM - Peak voltage seen by protected circuit during full-rated 10/1000 μs transient |
| Peak Pulse Power (PPPM) | 400 W - Sustained energy absorption capability per single 10/1000 μs waveform |
| Reverse Leakage (ID) | ≤800 μA at 5.0 V - Minimal standby current draw preserving low-power system integrity |
| Operating Temperature | -55 °C to +150 °C - Validated performance across automotive under-hood and industrial ambient extremes |
| Package | SMA (DO-214AC) - Standardized surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR |
| Anode | Reference/ground return | Typically tied to system ground plane; completes clamping path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body modules, and ADAS sensors |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements without compromising surge robustness |
| 400 W peak pulse power | Handles high-energy transients from inductive switching (e.g., relay coils, solenoids) without degradation |
| Low clamping ratio (VC/VWM = 1.84) | Minimizes stress on downstream ICs by tightly constraining overvoltage excursion |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift over temperature and lifetime |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load-dump and jump-start transients in door modules and lighting controllers. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed directly at connector entry point to divert >100 V spikes before reaching silicon. Use Value: Enables reliable operation under ISO 7637-2 Pulse 5a (load dump) with no derating required up to +125 °C ambient. | Use Scenario: Safeguarding 4–20 mA current-loop analog inputs and RS-485 transceivers in PLC I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on signal/power lines, coordinated with secondary filtering. Use Value: Clamps induced lightning surges (IEC 61000-4-5 Level 3) to <9.2 V while maintaining <800 μA leakage at 5 V nominal rail. |
| USB 2.0 Data Line Protection | DC-DC Converter Input Stage |
Use Scenario: ESD and cable discharge protection for USB D+/D- lines in embedded host devices and peripherals. IC Role / Device Role / Timing Role: Low-capacitance (typ. 350 pF at 0 V) bidirectional-capable clamp integrated into USB connector footprint. Use Value: Passes USB 2.0 eye diagram compliance with <1 ps response and no signal integrity degradation at 480 Mbps. | Use Scenario: Input rail protection for buck converters powering FPGAs or DSPs in telecom power supplies. IC Role / Device Role / Timing Role: First-line defense against input voltage spikes caused by hot-plug events or upstream switching noise. Use Value: Absorbs 400 W pulses without latch-up, preserving converter enable logic and preventing MOSFET gate oxide damage. |
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_A/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Acceptable where halogen content is unrestricted (e.g., commercial-grade industrial controls) | Select SMAJ5.0AHM3_A/I when halogen-free compliance is mandated by OEM or regional regulation. |
| SMAJ5.0A-E3/61 | Commercial-grade (non-AEC-Q101), RoHS-compliant, same SMA package and electrical ratings | Suitable for non-automotive applications with lower reliability requirements (e.g., consumer IoT gateways) | Choose SMAJ5.0A-E3/61 only if AEC-Q101 qualification and extended temperature validation are unnecessary. |
Compared with SMAJ5.0AHE3_A/I and SMAJ5.0A-E3/61, the SMAJ5.0AHM3_A/I uniquely combines halogen-free construction, AEC-Q101 qualification, and full automotive temperature range support-making it the sole option for Tier 1 automotive subsystems requiring both environmental and reliability certification.
Availability
SMAJ5.0AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and USB interface protection requiring stable component supply across multi-year production cycles.
Supply support for SMAJ5.0AHM3_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, efficiency, and application-specific optimization.
The SMAJ series is engineered for robust transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven clamping performance and qualification rigor.
FAQ
What is the maximum clamping voltage of the SMAJ5.0AHM3_A/I under full-rated surge current?
The SMAJ5.0AHM3_A/I exhibits a maximum clamping voltage (VC) of 9.2 V when subjected to its rated peak pulse current of 43.5 A using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C with specified PCB pad layout (0.2" × 0.2" copper), and remains within specification across its full operating temperature range (-55 °C to +150 °C) per Vishay's derating curves.
Is the SMAJ5.0AHM3_A/I qualified for automotive applications?
Yes, the SMAJ5.0AHM3_A/I carries AEC-Q101 qualification, confirming its suitability for automotive electronics. The "HM3" suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 validation, supporting use in engine control units, body electronics, and ADAS subsystems where reliability under thermal cycling, vibration, and voltage transients is mandatory.
What does the "HM3" suffix indicate in SMAJ5.0AHM3_A/I?
The "HM3" suffix in SMAJ5.0AHM3_A/I identifies it as halogen-free, RoHS-compliant, and AEC-Q101 qualified-distinguishing it from "HE3" (RoHS-compliant + AEC-Q101, but not halogen-free) and "E3/M3" (commercial-grade variants). The "A/I" denotes packaging in 13" tape-and-reel format with 7500-unit quantity, per Vishay's ordering nomenclature.
How does the SMAJ5.0AHM3_A/I compare to bidirectional TVS diodes like SMAJ5.0CA?
The SMAJ5.0AHM3_A/I is unidirectional and intended for DC power rail or signal line protection with defined polarity; SMAJ5.0CA is bidirectional and used where AC-coupled or polarity-agnostic protection is needed (e.g., telecom lines). Their clamping voltages differ: SMAJ5.0AHM3_A/I clamps at 9.2 V, while SMAJ5.0CA clamps at 12.5 V (max) per datasheet Table 1, reflecting different breakdown symmetry.
What is the thermal resistance of the SMAJ5.0AHM3_A/I, and how does it affect PCB layout?
The SMAJ5.0AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain safe operation at full 400 W pulse rating, Vishay specifies mounting on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal-underscoring the need for adequate copper area and thermal vias in high-surge designs using SMAJ5.0AHM3_A/I.
SMAJ5.0AHM3_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:
- 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_A/I FAQ
1.How can I place an order for SMAJ5.0AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0AHM3_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 SMAJ5.0AHM3_A/I reliable?
The price and inventory of SMAJ5.0AHM3_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 SMAJ5.0AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ5.0AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0AHM3_A/I?
SMAJ5.0AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0AHM3_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 SMAJ5.0AHM3_A/I?
For technical support, including SMAJ5.0AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0AHM3_A/I requirements.
6.How does Aetrix verify that SMAJ5.0AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0AHM3_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 SMAJ5.0AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ5.0AHM3_A/I?
All SMAJ5.0AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0AHM3_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 SMAJ5.0AHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ5.0AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0AHM3_A/I Tags
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