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Vishay General Semiconductor - Diodes Division SMAJ10AHM3_A/I
- Part No.:
- SMAJ10AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10AHM3_A/I.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,409
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Product details
Overview
SMAJ10AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 10 V stand-off voltage (VWM), 11.1–12.3 V breakdown voltage (VBR) at 1 mA, 17.0 V maximum clamping voltage (VC) at 23.5 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ10AHM3_A/I datasheet, SMAJ10AHM3_A/I pinout, SMAJ10AHM3_A/I application, or SMAJ10AHM3_A/I equivalent, this device is evaluated for ESD and surge immunity in 12 V rail protection, low-voltage sensor line hardening, and AEC-Q101-compliant automotive subsystems where compact footprint and fast response (<1 ns) are critical.
Technical Context
This unidirectional TVS operates by avalanche breakdown to limit transient overvoltages before they damage downstream components. Its glass-passivated junction ensures stable VBR and low leakage (≤1.0 μA at 10 V), while the SMA package supports automated placement and meets MSL Level 1 reflow (260 °C peak).
The device delivers 400 W peak pulse power up to 78 V, derating to 300 W above that threshold, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. It is halogen-free, RoHS-compliant, and qualified to AEC-Q101 - confirmed by ordering suffix "HM3" and revision code "A/I".
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 11.1 V / 12.3 V at 1 mA - defines guaranteed avalanche onset range for design margining |
| VC @ IPPM | 17.0 V at 23.5 A - clamped voltage seen by protected circuit during worst-case 10/1000 μs surge |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak transient energy absorption capability under standard waveform |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - enables operation in under-hood automotive and high-ambient industrial environments |
| Package | SMA (DO-214AC) - 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground or return path | Current flows into cathode during transient; anode ties to system reference plane |
| Cathode | High-side connection to vulnerable node (e.g., 12 V rail or signal line) | Banded end - connects to line being protected; avalanche conduction occurs cathode-to-anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
| Halogen-free & RoHS | Complies with environmental regulations without compromising surge robustness or thermal performance |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems with margin |
| Fast response time | <1 ns turn-on ensures clamping before sensitive logic or analog circuitry is stressed |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak, no floor life limitation |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs of BCM microcontrollers and CAN transceivers against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient overvoltage on main power rail before it reaches LDOs and MCU VDD pins. Use Value: Limits rail voltage to ≤17.0 V during 400 W surges, preventing latch-up or permanent damage to 5 V/3.3 V logic domains. |
Use Scenario: Shielding 24 V digital input channels of programmable logic controllers from field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff at 10 V allows normal 24 V sensing; clamps >17 V spikes to protect optocoupler LED drivers and input comparators. Use Value: Enables reliable operation in factory-floor environments with frequent relay switching and motor contactor noise. |
| Automotive Occupant Detection Sensor | Consumer Appliance Motor Driver Interface |
|
Use Scenario: Safeguarding capacitive or piezoresistive occupant detection sensors connected to vehicle battery via long harnesses. IC Role / Device Role / Timing Role: TVS placed at connector entry point to absorb ESD (IEC 61000-4-2 ±8 kV) and coupled RF energy. Use Value: Maintains sensor accuracy by limiting leakage to ≤1.0 μA and avoiding false triggers during transient events. |
Use Scenario: Protecting gate driver signal lines between MCU and half-bridge MOSFETs in washing machine motor control boards. IC Role / Device Role / Timing Role: Clamps inductive kickback from motor windings and prevents shoot-through due to voltage overshoot on logic inputs. Use Value: Guarantees <1 ns response to preserve timing margins in PWM-driven gate drive paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10AHE3_A/I | Same electrical specs, but RoHS-compliant commercial grade (not halogen-free); lacks AEC-Q101 qualification | Acceptable for non-automotive industrial or consumer use where halogen-free and automotive qualification are not required | Select when cost sensitivity outweighs halogen-free or automotive compliance needs |
| SMAJ10A-M3/61 | Identical electrical and thermal specs; same HM3 halogen-free material, but packaged in 7" tape/reel (1800 pcs) vs. 13" (7500 pcs) | No functional difference - only packaging format and reel size vary; both meet AEC-Q101 and MSL Level 1 | Choose based on production volume and SMT line feeder compatibility |
Compared with SMAJ10AHM3_A/I, the HE3 variant trades halogen-free construction for lower cost in non-automotive roles, while the -M3/61 differs only in packaging - making SMAJ10AHM3_A/I optimal for high-volume automotive programs requiring full environmental and reliability compliance.
Availability
SMAJ10AHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and consumer appliance motor control systems requiring stable component supply with AEC-Q101 validation and halogen-free compliance.
Supply support for SMAJ10AHM3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, efficiency, and application-specific performance.
The SMAJ series targets board-level transient protection in automotive, industrial, and computing systems - engineered for high surge robustness, low clamping voltage, and seamless SMT integration.
FAQ
What is the clamping voltage of SMAJ10AHM3_A/I at its rated peak pulse current?
The SMAJ10AHM3_A/I has a maximum clamping voltage (VC) of 17.0 V when subjected to its peak pulse current (IPPM) of 23.5 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and ensures downstream components see no more than 17.0 V during transient events - critical for protecting 5 V or 3.3 V logic rails fed from a 12 V source. The SMAJ10AHM3_A/I maintains this performance across its full operating temperature range.
Is SMAJ10AHM3_A/I qualified for automotive applications?
Yes, SMAJ10AHM3_A/I is AEC-Q101 qualified, as confirmed by its "HM3" suffix and revision code "A/I" in the ordering nomenclature. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and surge endurance per the AEC-Q101 standard. This makes SMAJ10AHM3_A/I suitable for under-hood and cabin applications including body control modules, sensor interfaces, and infotainment power supplies.
How does the SMAJ10AHM3_A/I differ from the SMAJ10A-E3/61 variant?
The SMAJ10AHM3_A/I uses halogen-free molding compound and is AEC-Q101 qualified, whereas SMAJ10A-E3/61 is RoHS-compliant but not halogen-free and lacks automotive qualification. Both share identical electrical parameters (VWM = 10 V, VC = 17.0 V), but SMAJ10AHM3_A/I is specified for automotive-grade reliability and environmental compliance - essential for Tier 1 suppliers and OEM programs requiring full PPAP documentation.
What is the thermal resistance of SMAJ10AHM3_A/I, and how does it affect PCB layout?
SMAJ10AHM3_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 achieve rated 400 W pulse power, the datasheet specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Reducing pad area increases thermal impedance, derating pulse capability - so SMAJ10AHM3_A/I layout must follow Vishay's recommended footprint to maintain performance in sustained surge scenarios.
Can SMAJ10AHM3_A/I be used in bidirectional signal line protection?
No - SMAJ10AHM3_A/I is a unidirectional TVS diode, intended for DC-biased lines like power rails or single-ended signals referenced to ground. For bidirectional protection (e.g., RS-485, USB, or AC-coupled data lines), a bidirectional variant such as SMAJ10CA must be used. Using SMAJ10AHM3_A/I on a truly bidirectional line would result in forward conduction during negative transients, potentially damaging the device or circuit.
SMAJ10AHM3_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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- 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)
SMAJ10AHM3_A/I FAQ
1.How can I place an order for SMAJ10AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10AHM3_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 SMAJ10AHM3_A/I reliable?
The price and inventory of SMAJ10AHM3_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 SMAJ10AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ10AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10AHM3_A/I?
SMAJ10AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10AHM3_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 SMAJ10AHM3_A/I?
For technical support, including SMAJ10AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10AHM3_A/I requirements.
6.How does Aetrix verify that SMAJ10AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ10AHM3_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 SMAJ10AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ10AHM3_A/I?
All SMAJ10AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10AHM3_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 SMAJ10AHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ10AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ10AHM3_A/I Tags
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