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Vishay General Semiconductor - Diodes Division SMAJ100CAHM3_A/H
- Part No.:
- SMAJ100CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100CAHM3_A/H.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ100CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features 100 V stand-off voltage (VWM), 162 V maximum clamping voltage (VC) at 1.9 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the SMAJ100CAHM3_A/H datasheet, SMAJ100CAHM3_A/H pinout, SMAJ100CAHM3_A/H application, or SMAJ100CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (via HM3 suffix), low incremental surge resistance, and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector: when reverse voltage exceeds its breakdown threshold (VBR min = 111 V, max = 123 V at 1 mA), it avalanches to limit transient energy. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity sensitivity in AC-coupled or floating signal paths.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, with maximum junction temperature of +150 °C. It meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and supports repetitive surge duty cycle ≤ 0.01 % - critical for infrequent but high-energy events like ESD or inductive switching spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (min/max) | 111 V / 123 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on across manufacturing lot and temperature. |
| VC @ IPPM | 162 V at 1.9 A - clamped voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure level. |
| PPPM | 400 W - peak pulse power handling per 10/1000 μs waveform; derates to 300 W above 78 V, confirmed at TA = 25 °C on 5.0 mm × 5.0 mm pads. |
| ID @ VWM | 1.0 μA - reverse leakage at 100 V; low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive or industrial ambient up to +125 °C with appropriate thermal design. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; enabled by HM3 suffix. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current regardless of polarity - no cathode band marking. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical structure; completes low-impedance path to ground or return rail during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for polarity-aware layout in AC or differential signal lines. |
| 400 W peak pulse power | Robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) and ISO 7637-2 Pulse 1/2a without derating. |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Low profile SMA package | 0.208" × 0.157" footprint with 0.078" height - fits dense PCB layouts while maintaining thermal pad area for 3.3 W steady-state dissipation. |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C peak - supports high-yield automated assembly without moisture sensitivity concerns. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN FD or LIN bus transceivers from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt surge energy before IC input stages. Use Value: Limits transient voltage to ≤162 V, preventing damage to 5 V or 3.3 V transceivers while maintaining signal integrity during normal operation. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Standoff protector between field-side terminals and optocoupler input, absorbing 10/1000 μs transients up to 400 W. Use Value: Enables reliable operation in harsh factory environments where >1 kV surges occur regularly, reducing field failure rates. |
| Telecom Line Interface | Consumer Power Adapter Output |
|
Use Scenario: Surge suppression on Ethernet PHY side of PoE-powered devices subjected to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Common-mode TVS across twisted-pair lines referenced to chassis ground, triggered within <1 ps response time. Use Value: Clamps induced voltages before they exceed Ethernet PHY absolute maximum ratings, preserving link stability after surge events. |
Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters to prevent downstream device damage during regulation fault. IC Role / Device Role / Timing Role: Fast-acting clamp across 5–20 V output rails, activated only during abnormal open-loop conditions. Use Value: Adds fail-safe layer beyond primary controller OVP, limiting output excursion to ≤162 V even if feedback loop fails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100CAHE3_A/H | Same electrical specs, but RoHS-compliant commercial grade (not AEC-Q101 qualified); E3 suffix indicates non-automotive variant. | Lacks automotive qualification testing - suitable for industrial or consumer use where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and qualification documentation is not required. |
| SMBJ100CAHM3_A/H | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; higher PPPM (600 W) due to improved thermal mass. | Requires larger PCB footprint (0.236" × 0.157") and different pad layout; better suited for higher-energy surge environments. | Choose when system-level surge testing exceeds 400 W requirements or when thermal margin must be increased without redesigning layout. |
Compared with SMAJ100CAHE3_A/H, the SMAJ100CAHM3_A/H adds AEC-Q101 validation for automotive deployment; versus SMBJ100CAHM3_A/H, it trades 200 W pulse power headroom for 25 % smaller board area - enabling compact designs where 400 W protection suffices.
Availability
SMAJ100CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMAJ100CAHM3_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, efficiency, and application-specific optimization.
The SMAJ series targets high-reliability transient suppression in space-constrained, high-surge environments - engineered for automotive, industrial, and telecom systems demanding robust, standardized, and AEC-Q101-qualified TVS solutions.
FAQ
What is the clamping voltage of SMAJ100CAHM3_A/H at its rated peak pulse current?
The SMAJ100CAHM3_A/H has a maximum clamping voltage (VC) of 162 V at its specified peak pulse current (IPPM) of 1.9 A, measured under the standard 10/1000 μs waveform condition. This value ensures protected circuits remain within safe voltage limits during surge events. The SMAJ100CAHM3_A/H maintains this clamping performance across its full operating temperature range and is validated per JEDEC test methods.
Is SMAJ100CAHM3_A/H suitable for automotive applications?
Yes, the SMAJ100CAHM3_A/H is AEC-Q101 qualified, as indicated by the HM3 suffix, confirming compliance with automotive reliability standards including temperature cycling, highly accelerated life testing, and ESD robustness. The SMAJ100CAHM3_A/H is explicitly intended for under-hood and cabin electronics such as sensor interfaces, body control modules, and infotainment power rails.
How does the bidirectional configuration of SMAJ100CAHM3_A/H affect its circuit placement?
The SMAJ100CAHM3_A/H has no polarity marking and exhibits symmetric electrical characteristics in both directions, allowing placement across any two points needing transient suppression - such as differential signal pairs, AC lines, or floating power domains - without orientation constraints. This simplifies layout and eliminates risk of reverse installation, unlike unidirectional TVS diodes which require cathode alignment.
What is the thermal resistance of SMAJ100CAHM3_A/H, and how does it impact PCB layout?
The SMAJ100CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain reliability, PCB layout must replicate this minimum pad area; reducing pad size increases thermal impedance and risks exceeding the +150 °C maximum junction temperature during repetitive surges.
Does SMAJ100CAHM3_A/H meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, the SMAJ100CAHM3_A/H meets J-STD-020 MSL Level 1 with a maximum peak reflow temperature of 260 °C, meaning it can be processed using standard lead-free solder profiles without baking or special handling. This MSL Level 1 rating is verified per JEDEC test conditions and applies to the SMA (DO-214AC) package used in the SMAJ100CAHM3_A/H.
SMAJ100CAHM3_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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ100CAHM3_A/H FAQ
1.How can I place an order for SMAJ100CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100CAHM3_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 SMAJ100CAHM3_A/H reliable?
The price and inventory of SMAJ100CAHM3_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 SMAJ100CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ100CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100CAHM3_A/H?
SMAJ100CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100CAHM3_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 SMAJ100CAHM3_A/H?
For technical support, including SMAJ100CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100CAHM3_A/H requirements.
6.How does Aetrix verify that SMAJ100CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ100CAHM3_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 SMAJ100CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ100CAHM3_A/H?
All SMAJ100CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100CAHM3_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 SMAJ100CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMAJ100CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100CAHM3_A/H Tags
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