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Vishay General Semiconductor - Diodes Division SMAJ100CHE3/5A
- Part No.:
- SMAJ100CHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100CHE3/5A.pdf
- Description:
- TVS DIODE 100VWM 179VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,982
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Product details
Overview
SMAJ100CHE3/5A from Vishay General Semiconductor is a high-reliability, AEC-Q101-qualified bi-directional transient voltage suppressor (TVS) in DO-214AC (SMA) package, designed for automotive and industrial overvoltage protection. It features 100 V stand-off voltage (VWM), 179 V maximum clamping voltage (VC) at 1.7 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), protecting sensitive signal lines and power rails against ESD, lightning, and inductive switching transients.
For engineers reviewing the SMAJ100CHE3/5A datasheet, SMAJ100CHE3/5A pinout, SMAJ100CHE3/5A application, or SMAJ100CHE3/5A equivalent, this device serves as a robust, RoHS-compliant, high-temperature (TJ = –55 °C to +150 °C) TVS diode optimized for automotive-grade surge immunity in CAN, LIN, sensor interfaces, and DC power inputs where reliability under harsh conditions is critical.
Technical Context
The SMAJ100CHE3/5A is a bi-directional silicon avalanche diode with symmetrical breakdown characteristics in both polarities, enabling bidirectional transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR (111–136 V) and low incremental surge resistance, supporting fast response (<1 ps) to sub-microsecond transients.
Rated for 400 W peak pulse power (derated to 300 W above 78 V), it operates within a thermal resistance profile of RθJA = 120 °C/W and RθJL = 30 °C/W, and meets MSL Level 1 per J-STD-020 with 260 °C solder reflow tolerance - confirming suitability for automated SMT assembly in high-volume automotive production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 12 V/24 V automotive systems. |
| VC @ IPPM | 179 V - Clamped voltage at 1.7 A peak pulse current; limits downstream IC stress during 10/1000 µs surges. |
| IPPM | 1.7 A - Peak surge current capability under standard 10/1000 µs waveform; determines minimum trace width and PCB copper pad sizing. |
| PPPM | 400 W - Peak pulse power rating (10/1000 µs); validates protection level against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| TJ Range | –55 °C to +150 °C - Extended junction temperature range confirms operation in engine bay, under-hood, and industrial control environments. |
| Leakage ID | 1.0 µA max @ VWM - Ultra-low reverse leakage preserves battery life and avoids false triggering in always-on circuits. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TCT, and ESD testing; required for safety-critical ECUs and ADAS modules. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both ends) | Bi-directional surge path | Either terminal accepts positive or negative transient; no cathode band marking required for CA suffix devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional suppression | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN H/L, RS-485) without polarity concerns. |
| AEC-Q101 qualification | Validates long-term reliability under automotive thermal cycling, humidity, and mechanical shock - eliminates need for additional qualification testing. |
| Glass-passivated junction | Ensures stable VBR and low parameter drift over lifetime, critical for consistent clamping performance in safety systems. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C without preconditioning - simplifies manufacturing and reduces BOM complexity. |
| RoHS & WEEE compliant | Meets global environmental compliance requirements for automotive OEMs and Tier 1 suppliers shipping to EU, China, and North America. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting CAN transceivers (e.g., TJA1042, SN65HVD230) from load dump, jump-start, and ESD events on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Bi-directional TVS placed across CAN_H and CAN_L differential pair, clamping transients before they reach the transceiver input stage. Use Value: Maintains CAN bus integrity by limiting differential surge voltage to <180 V, preventing transceiver latch-up or permanent damage during ISO 7637-2 Pulse 5a. |
Use Scenario: Shielding analog outputs (4–20 mA, 0–10 V) and digital I/O (e.g., NTC thermistors, Hall sensors) in PLC modules and motor drives. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between signal line and ground, absorbing inductive kickback from solenoid valves or relay coils. Use Value: Prevents sensor offset drift and ADC saturation by clamping transients to ≤179 V while maintaining <1 µA leakage at 100 V system bias. |
| DC Power Input Protection | Automotive Lighting Control |
Use Scenario: Safeguarding 24 V supply rails in telematics units, infotainment head units, and ADAS cameras against load dump (ISO 16750-2). IC Role / Device Role / Timing Role: Parallel-connected TVS on main VIN rail, shunting energy from 12 V/24 V battery systems during alternator regulation failure. Use Value: Withstands 400 W peak power and 1.7 A surge, limiting rail voltage to 179 V for ≥100 ms - sufficient to survive typical 12 V load dump profiles. |
Use Scenario: Protecting LED driver ICs (e.g., TPS92630, AL8860) and microcontrollers in adaptive front lighting systems (AFS) and DRL modules. IC Role / Device Role / Timing Role: Bi-directional TVS placed across LED string anode/cathode or driver enable pins to suppress PWM-induced voltage spikes and ESD from handling. Use Value: Ensures uninterrupted illumination by preventing driver shutdown or latch-up during repeated 15 kV contact ESD events per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100CA-E3/5A | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, identical DO-214AC package and marking code. | Lacks automotive qualification; suitable for industrial/commercial designs not requiring AEC-Q101 validation. | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle assurance is not mandated. |
| SMBJ100CAHE3/5A | Same AEC-Q101 grade but SMB (DO-214AA) package; 600 W PPPM, lower VC (170 V), higher IPPM (2.9 A). | Higher surge capacity and tighter clamping, but larger footprint (4.58 × 3.94 mm vs. SMA's 4.58 × 2.92 mm) may require PCB redesign. | Choose when system-level surge test margins exceed 400 W or when lower clamping voltage is prioritized over board space. |
Compared with SMAJ100CHE3/5A, SMAJ100CA-E3/5A offers identical electrical specs but lacks automotive qualification, while SMBJ100CAHE3/5A delivers higher surge robustness in a larger package - making SMAJ100CHE3/5A the optimal balance of AEC-Q101 compliance, space efficiency, and validated 400 W protection for compact automotive modules.
Availability
SMAJ100CHE3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and DC power input protection requiring stable component supply across extended temperature ranges and rigorous reliability standards.
Supply support for SMAJ100CHE3/5A 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, precision, and automotive-grade qualification.
The SMAJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and stable clamping performance are mandatory.
FAQ
What is the key difference between SMAJ100CHE3/5A and SMAJ100CA-E3/5A?
The SMAJ100CHE3/5A is AEC-Q101 qualified for automotive use, whereas SMAJ100CA-E3/5A is commercial-grade with identical electrical specs (VWM = 100 V, VC = 179 V, PPPM = 400 W) but no automotive reliability validation. SMAJ100CHE3/5A undergoes extended stress testing including temperature cycling and HTOL, making it suitable for engine control, ADAS, and body electronics where field failure is unacceptable.
Does SMAJ100CHE3/5A have polarity markings on the package?
No - SMAJ100CHE3/5A is a bi-directional TVS (indicated by the "CA" suffix), and its DO-214AC (SMA) package has no cathode band or polarity marking. Both terminals are functionally identical, allowing flexible placement across differential lines like CAN_H/CAN_L or AC-coupled signals without orientation constraints.
What is the maximum clamping voltage of SMAJ100CHE3/5A under surge conditions?
The SMAJ100CHE3/5A has a maximum clamping voltage (VC) of 179 V at 1.7 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (–55 °C to +150 °C) and defines the upper voltage limit imposed on protected circuitry during transient events.
Can SMAJ100CHE3/5A be used in 12 V automotive systems?
Yes - SMAJ100CHE3/5A is rated for 100 V stand-off voltage (VWM), providing ample margin above nominal 12 V and typical 14 V alternator charging voltages. Its 179 V clamping voltage safely protects downstream 3.3 V/5 V logic and analog ICs during load dump (ISO 16750-2) and other high-energy transients common in 12 V architectures.
What is the thermal resistance specification for SMAJ100CHE3/5A?
The SMAJ100CHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured on 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pads. These values inform thermal design for sustained surge duty cycles and ensure safe operation within the –55 °C to +150 °C junction temperature range.
SMAJ100CHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 179V
- Current - Peak Pulse (10/1000µs):
- 1.7A
- 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)
SMAJ100CHE3/5A FAQ
1.How can I place an order for SMAJ100CHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100CHE3/5A 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 SMAJ100CHE3/5A reliable?
The price and inventory of SMAJ100CHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100CHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ100CHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100CHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100CHE3/5A?
SMAJ100CHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100CHE3/5A 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 SMAJ100CHE3/5A?
For technical support, including SMAJ100CHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100CHE3/5A requirements.
6.How does Aetrix verify that SMAJ100CHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ100CHE3/5A 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 SMAJ100CHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ100CHE3/5A?
All SMAJ100CHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100CHE3/5A, 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 SMAJ100CHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ100CHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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