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Vishay General Semiconductor - Diodes Division SMAJ100AHM3_A/I
- Part No.:
- SMAJ100AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100AHM3_A/I.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,012
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Product details
Overview
SMAJ100AHM3_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 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 - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMAJ100AHM3_A/I datasheet, SMAJ100AHM3_A/I pinout, SMAJ100AHM3_A/I application, or SMAJ100AHM3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), junction temperature range (−55 °C to +150 °C), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (VBR), limiting transient energy to protected downstream circuitry. Its glass-passivated junction ensures stable leakage performance, while low incremental surge resistance enables rapid voltage suppression during ESD or inductive switching events.
The SMAJ100AHM3_A/I is rated for 400 W peak pulse power (10/1000 μs) up to 78 V and derates to 300 W above 78 V; it supports repetitive surge duty cycles of 0.01 % and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 111 V / 123 V at 1 mA - guaranteed avalanche onset window defining turn-on consistency |
| VC @ IPPM | 162 V at 1.9 A - clamped voltage seen by protected circuit during full-rated transient |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak transient energy absorption capability under standard waveform |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage ensuring minimal standby power loss |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on standard PCB pad layout |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 100 V rail); band-marked end carries transient current into ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Halogen-free & RoHS-compliant | HM3 suffix denotes halogen-free molding compound meeting environmental compliance requirements |
| 400 W peak pulse power | Withstands high-energy transients common in 12 V/24 V vehicle power systems without degradation |
| Fast response time | Sub-nanosecond clamping enables protection of fast-switching MOSFET gates and microcontroller I/O |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60 % RH, compatible with standard SMT reflow profiles up to 260 °C |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 12 V/24 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between power input and ground to shunt surge energy away from DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤162 V during ISO 7637-2 Pulse 5a events, preventing latch-up or permanent damage to downstream ASICs. | Use Scenario: Protecting analog front-end inputs of pressure/temperature sensors connected to long harnesses in factory automation. IC Role / Device Role / Timing Role: Transient suppressor on sensor supply and signal lines to absorb ESD and inductive kickback from nearby solenoids or motors. Use Value: Maintains signal integrity by clamping transients within 1 ns, preserving ±0.1 % measurement accuracy under IEC 61000-4-2/4-4 stress. |
| Telecom DC Power Input Protection | Consumer Device USB/Power Port Protection |
Use Scenario: Safeguarding PoE-powered network switches and base station RF modules against lightning-induced surges on 48 V DC input rails. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, coordinated with upstream MOVs and fuses. Use Value: Absorbs 300 W transients without thermal runaway, enabling compliance with GR-1089-CORE Section 4.5.2.2 surge immunity. | Use Scenario: Hardening USB-C PD port and auxiliary power inputs in smart home hubs against user-induced ESD and hot-plug spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS placed directly at connector to divert >8 kV contact ESD per IEC 61000-4-2 before reaching USB controller or PMIC. Use Value: Delivers <1.0 μA leakage at 100 V, eliminating standby current penalty while maintaining Class 4 ESD immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100AHE3_A/I | Same electrical specs but RoHS-compliant (non-halogen-free) construction; no halogen-free certification | Acceptable for commercial/industrial use where halogen-free requirement is not mandated | Select when halogen-free compliance is not required and cost optimization is prioritized |
| SMAJ100A-M3/5A | Identical electrical and thermal specs; differs only in packaging format (13" reel, 7500 pcs) and base P/N suffix | No functional difference; suited for high-volume SMT production with bulk tape-and-reel handling | Select when procurement scale demands larger reels and standard M3 commercial-grade marking |
Compared with SMAJ100AHM3_A/I, the HE3 variant lacks halogen-free validation but offers identical clamping performance, while the M3/5A version provides identical functionality in a different packaging configuration - making HM3 the preferred choice strictly for automotive AEC-Q101 + halogen-free dual compliance.
Availability
SMAJ100AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer USB-PD systems requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMAJ100AHM3_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 applications where high surge immunity, AEC-Q101 qualification, and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of SMAJ100AHM3_A/I at its rated peak pulse current?
The SMAJ100AHM3_A/I has a maximum clamping voltage (VC) of 162 V at its rated peak pulse current (IPPM) of 1.9 A, measured using the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during full-rated transient events and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMAJ100AHM3_A/I maintains this clamping performance across its qualified operating temperature range.
Is SMAJ100AHM3_A/I qualified for automotive applications?
Yes, SMAJ100AHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix with "_A/I" revision). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness - validating its suitability for under-hood and chassis-mounted automotive electronics. The SMAJ100AHM3_A/I also meets MSL Level 1 and supports lead-free reflow up to 260 °C, aligning with automotive manufacturing standards.
What does the "HM3" suffix indicate in SMAJ100AHM3_A/I?
The "HM3" suffix in SMAJ100AHM3_A/I denotes halogen-free, RoHS-compliant construction per Vishay's material categorization system. It distinguishes this variant from E3 (RoHS-compliant, non-halogen-free) and HE3 (AEC-Q101 + RoHS) versions. The HM3 marking confirms compliance with JEDEC J-STD-20 and IPC-1752A for hazardous substance restrictions - essential for automotive OEMs and industrial customers requiring full material declarations.
How does SMAJ100AHM3_A/I differ from SMAJ100A-M3/5A?
SMAJ100AHM3_A/I and SMAJ100A-M3/5A share identical electrical, thermal, and mechanical specifications - including VWM = 100 V, VC = 162 V, RθJA = 120 °C/W, and SMA (DO-214AC) package. Their difference lies solely in packaging format (7" reel, 1800 pcs vs. 13" reel, 7500 pcs) and revision coding ("A/I" vs. "/5A"). Neither affects functional performance, but the HM3_A/I variant adds AEC-Q101 + halogen-free validation not present in the base M3/5A part.
What is the maximum reverse leakage current for SMAJ100AHM3_A/I at its stand-off voltage?
The maximum reverse leakage current (ID) for SMAJ100AHM3_A/I is 1.0 μA at its stand-off voltage (VWM) of 100 V and TA = 25 °C. This ultra-low leakage ensures minimal power loss in always-on systems such as automotive body controllers or IoT sensor nodes, supporting extended battery life and thermal stability. The SMAJ100AHM3_A/I maintains leakage below 5.0 μA across its full operating temperature range (−55 °C to +150 °C).
SMAJ100AHM3_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):
- 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_A/I FAQ
1.How can I place an order for SMAJ100AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100AHM3_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 SMAJ100AHM3_A/I reliable?
The price and inventory of SMAJ100AHM3_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 SMAJ100AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ100AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100AHM3_A/I?
SMAJ100AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100AHM3_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 SMAJ100AHM3_A/I?
For technical support, including SMAJ100AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100AHM3_A/I requirements.
6.How does Aetrix verify that SMAJ100AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ100AHM3_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 SMAJ100AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ100AHM3_A/I?
All SMAJ100AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100AHM3_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 SMAJ100AHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ100AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100AHM3_A/I Tags
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