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Vishay General Semiconductor - Diodes Division SMAJ100CAHE3_A/I
- Part No.:
- SMAJ100CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100CAHE3_A/I.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ100CAHE3_A/I 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 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 (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ100CAHE3_A/I datasheet, SMAJ100CAHE3_A/I pinout, SMAJ100CAHE3_A/I application, or SMAJ100CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics forward and reverse - enabling robust protection against ESD, lightning-induced surges, and inductive switching transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM).
The device delivers 400 W peak pulse power up to 78 V and derates to 300 W above 78 V per Fig. 2; thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting reliable operation under repetitive surge conditions when mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - maximum continuous reverse stand-off voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 111 V / 123 V at 1 mA - guaranteed breakdown range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 162 V at 1.9 A - clamping voltage limits downstream component stress during 10/1000 μs transients. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak pulse power handling capacity determines survivability of defined surge waveforms. |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss. |
| TJ max | +150 °C - extended junction temperature rating supports under-hood automotive and high-ambient industrial use. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102; meets UL 94 V-0 flammability rating and MSL level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (cathode band side) | Bidirectional symmetry means no functional anode/cathode distinction; terminals are interchangeable for transient suppression. |
| Cathode | Terminal 2 (opposite cathode band) | No marking on bidirectional types; both terminals behave identically under positive or negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 12 V/24 V automotive power rails. |
| AEC-Q101 qualified | Validated for automotive electronics including engine control units, ADAS sensors, and body control modules. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity and contamination vs. epoxy-passivated alternatives. |
| Low profile SMA package | 0.208" × 0.157" footprint enables high-density layout on space-constrained PCBs while maintaining thermal performance. |
| MSL Level 1 compliance | Allows unlimited floor life and single-reflow processing without baking, simplifying manufacturing logistics. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (up to 120 V) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across power input pins to limit voltage excursion during alternator regulation failure. Use Value: Limits rail voltage to ≤162 V during 400 W surges, preventing damage to 3.3 V/5 V microcontrollers and CAN transceivers downstream. |
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) TVS shunting fast-rising ESD events (IEC 61000-4-2 ±8 kV contact) on 0–10 V or 4–20 mA signal paths. Use Value: Maintains signal fidelity during normal operation while clamping sub-100 ns transients to <162 V without affecting sensor accuracy. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Protection |
|
Use Scenario: Guarding Ethernet PHY power pins (3.3 V/5 V) against induced surges from nearby AC mains or PoE cable coupling. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) bidirectional suppressor placed adjacent to connector entry points on line cards. Use Value: Clamps 10/1000 μs surges to 162 V within nanoseconds, preserving PHY IC integrity without adding capacitance that degrades 100BASE-TX signal integrity. |
Use Scenario: Safeguarding primary-side rectifier and controller ICs in universal-input (90–264 VAC) AC-DC adapters against lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-side TVS on DC bus (e.g., 12 V output rail) absorbing coupled transients from primary-side Y-capacitor or transformer parasitics. Use Value: Absorbs 300–400 W pulses without degradation, extending adapter MTBF in regions with unstable grid infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100CAHM3_A/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | Required where halogen-free material compliance is mandated (e.g., EU medical or public infrastructure projects). | Select when environmental compliance exceeds standard RoHS requirements; same PCB layout and thermal design. |
| SMCJ100CAHE3_A/I | Same VWM/VBR/VC but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (50 °C/W). | Suitable for higher-energy surge environments (e.g., industrial motor drives) where 400 W is insufficient. | Choose only if system-level surge testing exceeds IEC 61000-4-5 Level 4; requires larger PCB pad area and layout revision. |
Compared with SMAJ100CAHE3_A/I, SMAJ100CAHM3_A/I offers identical protection performance with halogen-free construction, while SMCJ100CAHE3_A/I provides 3.75× higher pulse power handling at the cost of increased board space and thermal interface redesign.
Availability
SMAJ100CAHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and consumer power adapters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ100CAHE3_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 high-reliability transient suppression in automotive, industrial, and communications systems - delivering consistent clamping performance across temperature and lifetime under real-world surge stress.
FAQ
What is the clamping voltage of SMAJ100CAHE3_A/I at its rated peak pulse current?
The SMAJ100CAHE3_A/I has a maximum clamping voltage (VC) of 162 V at its specified peak pulse current (IPPM) of 1.9 A under a 10/1000 μs waveform. This value is measured per Figure 1 and Table 1 in the Vishay datasheet 88390 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMAJ100CAHE3_A/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMAJ100CAHE3_A/I suitable for automotive applications?
Yes, SMAJ100CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use in Vishay's ordering nomenclature (HE3 suffix). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per JESD22, making it appropriate for engine control units, body electronics, and ADAS sensor modules. The SMAJ100CAHE3_A/I also meets MSL Level 1 for lead-free reflow compatibility in automotive manufacturing.
How does the bidirectional configuration of SMAJ100CAHE3_A/I affect its circuit implementation?
The SMAJ100CAHE3_A/I has no polarity marking and functions identically in both directions - meaning it can be placed across any two nodes without regard to orientation, simplifying layout and eliminating risk of reverse installation. Unlike unidirectional TVS diodes, the SMAJ100CAHE3_A/I clamps positive and negative transients symmetrically, which is essential for protecting AC-coupled signals, differential buses (e.g., RS-485), or floating power domains where voltage reversal may occur.
What is the thermal resistance of SMAJ100CAHE3_A/I, and how does it impact PCB layout?
The SMAJ100CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per JEDEC standards. To maintain safe junction temperatures during repetitive surges, designers must allocate adequate copper area per terminal and avoid excessive trace length or narrow routing - the SMAJ100CAHE3_A/I's thermal performance is directly tied to PCB copper mass and via placement.
Does SMAJ100CAHE3_A/I require derating above ambient temperature?
Yes, SMAJ100CAHE3_A/I must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet 88390: peak pulse power decreases linearly to zero at TJ = 150 °C. For example, at 85 °C ambient with typical RθJA, the usable PPPM drops to ~280 W. Designers must calculate actual junction temperature rise using power dissipation, layout thermal impedance, and ambient conditions - the SMAJ100CAHE3_A/I's rated 400 W applies only at 25 °C with specified mounting conditions.
SMAJ100CAHE3_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:
- -
- 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:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ100CAHE3_A/I FAQ
1.How can I place an order for SMAJ100CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100CAHE3_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 SMAJ100CAHE3_A/I reliable?
The price and inventory of SMAJ100CAHE3_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 SMAJ100CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ100CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100CAHE3_A/I?
SMAJ100CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100CAHE3_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 SMAJ100CAHE3_A/I?
For technical support, including SMAJ100CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ100CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ100CAHE3_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 SMAJ100CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ100CAHE3_A/I?
All SMAJ100CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100CAHE3_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 SMAJ100CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ100CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100CAHE3_A/I Tags
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