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Vishay General Semiconductor - Diodes Division SMAJ100AHM3/I
- Part No.:
- SMAJ100AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100AHM3/I.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,815
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Product details
Overview
SMAJ100AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 100 V stand-off voltage (VWM), 111–123 V breakdown voltage (VBR) at 1 mA, 162 V maximum clamping voltage (VC) at 1.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMAJ100AHM3/I datasheet, SMAJ100AHM3/I pinout, SMAJ100AHM3/I application, or SMAJ100AHM3/I equivalent, this device serves as a robust, AEC-Q101-qualified transient protection solution for automotive power rails, industrial sensor interfaces, and DC power input stages where fast response (<1 ps), low incremental surge resistance, and stable clamping under repetitive surge conditions are critical.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (>1 μA leakage at 100 V), then rapidly avalanches below 123 V to clamp transient energy into ground. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability across -55 °C to +150 °C operating range.
The SMAJ100AHM3/I is optimized for automated SMT assembly on standard PCB pads (0.2" × 0.2" copper), with MSL Level 1 moisture sensitivity, matte tin-plated leads compliant with J-STD-002, and halogen-free, RoHS-compliant construction per Vishay HM3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 100 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin for 12 V–48 V DC systems. |
| VBR (Breakdown Voltage) | 111–123 V at 1 mA - Tight tolerance ensures predictable avalanche onset; enables precise coordination with downstream overvoltage thresholds. |
| VC (Clamping Voltage) | 162 V at 1.9 A (10/1000 μs) - Limits transient voltage seen by protected ICs; supports robust immunity to IEC 61000-4-5 Level 3 surges. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single high-energy transients; derates to 300 W above 78 V per spec, confirming suitability for 100 V rail protection. |
| IPPM (Peak Pulse Current) | 1.9 A - Quantifies surge-handling capacity; validated with 10/1000 μs waveform per ANSI/IEEE C62.35. |
| TJmax | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without thermal derating penalties. |
| RθJA | 120 °C/W - Defines thermal performance on standard 0.2" × 0.2" copper pads; informs layout requirements for sustained power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with cathode band marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to protected line (e.g., 100 V supply rail); conducts during forward surge events only if polarity reversed. |
| Cathode | Reverse-biased reference terminal | Connected to system ground; avalanche conduction occurs between cathode and anode when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies; supports PPAP documentation. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental compliance mandates without compromising surge robustness or thermal stability. |
| 400 W peak pulse power (10/1000 μs) | Provides headroom for high-energy transients common in 24 V/48 V industrial and commercial power systems. |
| Very fast response time (<1 ps) | Clamps transients before they propagate to vulnerable IC inputs; eliminates need for additional RC filtering in many cases. |
| Low incremental surge resistance | Minimizes VC overshoot during high di/dt events, improving protection margin for MOSFET gates and microcontroller I/O. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed between power rail and chassis ground. Use Value: Clamps spikes up to 162 V at 1.9 A, preventing latch-up or gate oxide damage in MCU and CAN transceivers. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) unidirectional TVS on signal lines upstream of ADC input. Use Value: Sub-1 ns response prevents transient coupling into precision measurement circuits while maintaining signal integrity. |
| DC Power Input Stage Protection | Telecom Equipment Surge Suppression |
|
Use Scenario: Front-end protection for 48 V PoE-powered switches and routers against lightning-induced surges on Ethernet ports. IC Role / Device Role / Timing Role: Primary-level TVS on DC input bus prior to DC/DC converter stage. Use Value: 400 W rating handles IEC 61000-4-5 combination wave (1.2/50 μs voltage, 8/20 μs current) without degradation. |
Use Scenario: Secondary-side transient suppression on telecom base station power modules subjected to repeated surge stress. IC Role / Device Role / Timing Role: Unidirectional clamping device on +48 V backup supply lines feeding RF amplifiers. Use Value: AEC-Q101 qualification and 150 °C TJmax ensure reliability in thermally constrained outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100AHE3/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same electrical specs and package. | Preferred for commercial-grade industrial controls where automotive qualification is unnecessary. | Select when halogen-free content and automotive qualification are not required; lower cost alternative with identical clamping behavior. |
| SMBJ100A-HM3 | Same VWM/VC but higher PPPM (600 W); SMB (DO-214AA) package with larger footprint and better thermal dissipation. | Better suited for high-repetition-rate surge environments (e.g., motor drive feedback loops) requiring enhanced thermal margin. | Choose when board space allows larger SMB package and system-level testing demands >400 W surge handling capability. |
Compared with SMAJ100AHM3/I, SMAJ100AHE3/I offers identical protection performance without halogen-free or automotive qualification, while SMBJ100A-HM3 delivers higher surge power in a physically larger package-enabling trade-offs between board area, thermal budget, and compliance requirements.
Availability
SMAJ100AHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC power input stage surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ100AHM3/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 high-reliability transient suppression in harsh environments-including automotive, industrial, and telecom-delivering consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of the SMAJ100AHM3/I at its rated peak pulse current?
The SMAJ100AHM3/I has a maximum clamping voltage (VC) of 162 V at 1.9 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ100AHM3/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), ensuring consistent protection in demanding environments.
Is the SMAJ100AHM3/I suitable for automotive applications?
Yes, the SMAJ100AHM3/I is AEC-Q101 qualified, making it suitable for automotive applications including engine control units, body electronics, and ADAS power supplies. Its halogen-free, RoHS-compliant construction (HM3 suffix), MSL Level 1 rating, and guaranteed operation from -55 °C to +150 °C meet stringent automotive reliability requirements. The SMAJ100AHM3/I is explicitly designated for automotive use in Vishay's ordering nomenclature.
How does the SMAJ100AHM3/I differ from the SMAJ100AHE3/I?
The SMAJ100AHM3/I and SMAJ100AHE3/I share identical electrical specifications-including VWM, VBR, VC, and PPPM-but differ in material compliance and qualification. The SMAJ100AHM3/I is halogen-free and AEC-Q101 qualified, whereas the SMAJ100AHE3/I is RoHS-compliant but not halogen-free and lacks automotive qualification. Both use the same SMA (DO-214AC) package and cathode-band marking.
What is the maximum reverse leakage current for the SMAJ100AHM3/I at its stand-off voltage?
The SMAJ100AHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 100 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss in standby mode and avoids interference with high-impedance sensing circuits. Leakage remains within specification across the full operating temperature range, supporting reliable performance in battery-powered and low-power systems.
Can the SMAJ100AHM3/I be used in bidirectional configurations?
No, the SMAJ100AHM3/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants carry the "CA" suffix (e.g., SMAJ100CA). Using the SMAJ100AHM3/I in reverse-biased AC or symmetrical transient scenarios would result in forward conduction and potential failure. For bidirectional protection, select SMAJ100CA-HM3 or equivalent with verified CA-series specifications.
SMAJ100AHM3/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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 1.9A
- 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)
SMAJ100AHM3/I FAQ
1.How can I place an order for SMAJ100AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100AHM3/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 SMAJ100AHM3/I reliable?
The price and inventory of SMAJ100AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100AHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ100AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100AHM3/I?
SMAJ100AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100AHM3/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 SMAJ100AHM3/I?
For technical support, including SMAJ100AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100AHM3/I requirements.
6.How does Aetrix verify that SMAJ100AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ100AHM3/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 SMAJ100AHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ100AHM3/I?
All SMAJ100AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100AHM3/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 SMAJ100AHM3/I part is unused and in its original packaging.
Return procedure for SMAJ100AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100AHM3/I Tags
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