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Vishay General Semiconductor - Diodes Division SMAJ11AHM3_A/H
- Part No.:
- SMAJ11AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11AHM3_A/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ11AHM3_A/H 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 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V maximum clamping voltage (VC) at 22 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ11AHM3_A/H datasheet, SMAJ11AHM3_A/H pinout, SMAJ11AHM3_A/H application, or SMAJ11AHM3_A/H equivalent, key selection criteria include unidirectional polarity, 18.2 V clamping performance at 22 A, AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 11 V), but switches to low-impedance conduction within <1 ns when transient voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The device is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports operating junction temperatures from –55 °C to +150 °C, and exhibits a positive temperature coefficient of VBR (+0.080 %/°C), enabling predictable voltage margining across thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range for protected line. |
| VBR min/max | 12.2 V / 13.5 V at 1 mA - guaranteed breakdown onset window; ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 18.2 V at 22 A - clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 400 W - peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (2 kV/12 Ω) on 12 V rails. |
| ID @ VWM | 1.0 μA - reverse leakage at stand-off voltage; negligible power loss and no measurable loading on 11 V supply or signal lines. |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial motor drive environments. |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 3.99 mm × 4.50 mm footprint and 2.29 mm height; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated 400 W pulse dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential point in protected circuit; forms return path during transient clamping. |
| Cathode | High-side transient input | Connected to line being protected (e.g., 12 V rail or sensor output); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with JEDEC JS709E and EU RoHS Directive 2011/65/EU for green manufacturing. |
| 400 W peak pulse power | Rated for 10/1000 μs waveform at TA = 25 °C; derates to 300 W above 78 V, supporting robust protection on 12–48 V systems. |
| Fast response time | <1 ns turn-on delay ensures clamping occurs before sensitive logic or analog circuitry sustains damage from ESD or load dump. |
| MSL Level 1 | Moisture sensitivity level 1 per J-STD-020; allows unlimited floor life and reflow up to 260 °C peak without preconditioning. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump transients (ISO 16750-2) and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VCC and GND, clamping surges before they reach LDO or MCU VDD pins. Use Value: Limits voltage to ≤18.2 V during 22 A transients, preventing latch-up or oxide breakdown in 3.3 V/5 V logic supplies. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors connected to PLC analog input modules. IC Role / Device Role / Timing Role: TVS mounted at sensor connector interface to absorb induced lightning or switching noise on 4–20 mA or 0–10 V lines. Use Value: Sub-20 V clamping preserves ADC reference integrity and avoids saturation or damage to precision op-amps in signal conditioning stages. |
| Consumer USB Power Line Protection | Telecom DC Feeder Protection |
|
Use Scenario: Adding overvoltage resilience to USB-C VBUS lines in portable docking stations exposed to hot-plug and adapter fault conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of USB PD controller to clamp 20 V+ faults before they propagate to buck converters or Type-C port logic. Use Value: 11 V VWM aligns with USB 2.0/3.0 VBUS tolerance while 18.2 V VC prevents damage to 5 V tolerant PHYs during 15 kV ESD events. |
Use Scenario: Protecting -48 V DC telecom power feeds from induced surges due to nearby lightning strikes or power system switching. IC Role / Device Role / Timing Role: Reverse-biased unidirectional TVS (cathode to -48 V rail) clamping negative-going transients toward ground reference. Use Value: Stable 12.2–13.5 V VBR ensures precise triggering on -48 V systems where ±10 % variation is typical; low leakage avoids drain on backup batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11AHE3_A/H | Same electrical specs, but RoHS-compliant with lead-free solderability; lacks halogen-free certification. | Preferred for commercial-grade designs where halogen content is not restricted; identical AEC-Q101 qualification. | Select SMAJ11AHE3_A/H if halogen-free material is not required and cost optimization is prioritized. |
| SMAJ11A-E3/61 | Same core TVS die, standard RoHS-compliant version in 7" tape; no AEC-Q101 qualification or halogen-free claim. | Suitable for non-automotive industrial or consumer applications where automotive reliability testing is unnecessary. | Choose SMAJ11A-E3/61 for cost-sensitive, non-automotive designs requiring only basic IEC 61000-4-2/4-5 compliance. |
Compared with SMAJ11AHM3_A/H, SMAJ11AHE3_A/H offers identical surge performance with lower material compliance scope, while SMAJ11A-E3/61 omits both AEC-Q101 validation and halogen-free assurance - making SMAJ11AHM3_A/H the sole option meeting full automotive environmental and reliability requirements.
Availability
SMAJ11AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, and telecom power feeders requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMAJ11AHM3_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 and application-specific performance.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against load dump, ESD, and lightning-induced surges is critical.
FAQ
What is the clamping voltage of SMAJ11AHM3_A/H at its rated peak pulse current?
The SMAJ11AHM3_A/H has a maximum clamping voltage (VC) of 18.2 V at 22 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ11AHM3_A/H maintains this clamping performance across its qualified operating temperature range.
Is SMAJ11AHM3_A/H qualified for automotive use?
Yes, SMAJ11AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet revision 09-Jan-2024. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, making SMAJ11AHM3_A/H suitable for under-hood and chassis-mounted automotive electronics.
What does the "HM3" suffix indicate in SMAJ11AHM3_A/H?
The "HM3" suffix in SMAJ11AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from "HE3" (RoHS + AEC-Q101, not halogen-free) and "E3" (RoHS only). The "_A/H" indicates packaging in 7" tape and reel with 1800-unit quantity, per Vishay's ordering information table.
How does SMAJ11AHM3_A/H differ from SMAJ11A-E3/61?
SMAJ11AHM3_A/H adds AEC-Q101 qualification and halogen-free material compliance versus SMAJ11A-E3/61, which is RoHS-compliant only and not automotive-qualified. Both share identical electrical parameters (VWM = 11 V, VC = 18.2 V), but SMAJ11AHM3_A/H is intended for mission-critical automotive systems where extended reliability validation is mandatory.
What PCB layout guidance applies to SMAJ11AHM3_A/H for optimal surge handling?
For rated 400 W pulse power, Vishay specifies mounting SMAJ11AHM3_A/H on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Trace width should be ≥20 mils, and ground plane connectivity must be low-inductance. Avoid thermal relief on cathode/anode pads to minimize impedance during transient conduction - this ensures SMAJ11AHM3_A/H achieves its specified clamping performance.
SMAJ11AHM3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 22A
- 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)
SMAJ11AHM3_A/H FAQ
1.How can I place an order for SMAJ11AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11AHM3_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 SMAJ11AHM3_A/H reliable?
The price and inventory of SMAJ11AHM3_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 SMAJ11AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ11AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11AHM3_A/H?
SMAJ11AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11AHM3_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 SMAJ11AHM3_A/H?
For technical support, including SMAJ11AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11AHM3_A/H requirements.
6.How does Aetrix verify that SMAJ11AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ11AHM3_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 SMAJ11AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ11AHM3_A/H?
All SMAJ11AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11AHM3_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 SMAJ11AHM3_A/H part is unused and in its original packaging.
Return procedure for SMAJ11AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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