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Vishay General Semiconductor - Diodes Division SMAJ100CAHE3/5A
- Part No.:
- SMAJ100CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100CAHE3/5A.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,293
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Product details
Overview
SMAJ100CAHE3/5A 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 - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ100CAHE3/5A datasheet, SMAJ100CAHE3/5A pinout, SMAJ100CAHE3/5A application, or SMAJ100CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at VWM), then rapidly avalanches below 162 V to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), critical for suppressing ESD and inductive switching spikes.
The SMAJ100CAHE3/5A is rated for 400 W peak pulse power up to 78 V and 300 W above that threshold, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W - requiring minimum 5.0 mm × 5.0 mm copper pad per terminal for full power derating. It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive use.
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 breakdown range defining turn-on threshold |
| VC @ IPPM | 162 V at 1.9 A - clamping voltage during 10/1000 μs transient, limiting stress on protected IC |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak transient energy absorption capacity per pulse |
| ID @ VWM | 1.0 μA - ultra-low leakage ensuring minimal standby power impact on sensitive analog circuits |
| TJ max. | +150 °C - enables operation in under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline compatible with JEDEC MS-013 |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, 260 °C reflow compatible. Bidirectional construction has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One end of symmetrical avalanche junction; accepts surge current in either direction |
| Cathode | Transient current exit (bidirectional) | Other end of symmetrical junction; completes low-impedance path to ground or rail during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| 400 W peak pulse power | Withstands 10/1000 μs transients up to 1.9 A without degradation - sufficient for ISO 7637-2 Pulse 1/2a/5a |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on protected devices compared to higher-ratio TVS diodes |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; supports lead-free reflow up to 260 °C peak |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and ground. Use Value: Clamps transients up to 162 V while maintaining <1.0 μA leakage at 100 V - preserving system quiescent current budget. |
Use Scenario: Safeguarding RS-485 or CAN FD transceivers from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional line protector across differential data pair (A/B) or single-ended I/O. Use Value: Sub-1 ns response time limits voltage overshoot to <162 V, preventing latch-up or gate oxide damage in transceivers. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
Use Scenario: Secondary-side surge suppression in AC/DC adapters exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on +5 V or +12 V output rail before LDO or DC-DC converter. Use Value: 400 W rating handles repetitive 10/1000 μs pulses per IEC 61000-4-5 Level 3, enabling compliance without additional stages. |
Use Scenario: Overvoltage protection on -48 V telecom power distribution boards. IC Role / Device Role / Timing Role: Bidirectional clamp referenced to system ground, protecting PMICs and interface ICs. Use Value: 150 °C TJ max and 120 °C/W RθJA allow operation in sealed enclosures with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100CA-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected when halogen-free material compliance is required | Direct drop-in replacement where halogen-free bill-of-materials is mandated |
| SMBJ100CAHE3/5A | Same VWM/VC ratings but in SMB (DO-214AA) package - 20 % larger footprint, 500 W PPPM rating | Higher power handling suits designs with >1.9 A expected surge currents or tighter clamping margin needs | Choose when board space permits and higher surge robustness is prioritized over miniaturization |
Compared with SMAJ100CAHE3/5A, the SMAJ100CA-M3/5A offers identical protection performance with halogen-free construction, while SMBJ100CAHE3/5A provides 25 % higher peak pulse power in a larger package - enabling longer transient duration tolerance without thermal runaway.
Availability
SMAJ100CAHE3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and telecom power supply designs requiring stable component supply, AEC-Q101 qualification, and consistent TVS clamping performance across production batches.
Supply support for SMAJ100CAHE3/5A 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMAJ series delivers standardized, high-reliability TVS diodes optimized for cost-sensitive yet mission-critical transient suppression in automotive, industrial, and communications infrastructure - balancing power density, clamping accuracy, and manufacturability.
FAQ
What is the clamping voltage of SMAJ100CAHE3/5A at its rated peak pulse current?
The SMAJ100CAHE3/5A exhibits a maximum clamping voltage (VC) of 162 V when subjected to its specified peak pulse current (IPPM) of 1.9 A under the 10/1000 μs waveform condition. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMAJ100CAHE3/5A suitable for automotive applications?
Yes, SMAJ100CAHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD immunity - making it appropriate for engine control units, body electronics, and ADAS sensor modules where reliability under harsh thermal and electrical conditions is mandatory.
How does the bidirectional configuration of SMAJ100CAHE3/5A affect its circuit implementation?
The bidirectional configuration of SMAJ100CAHE3/5A means it functions identically in both polarities - no cathode band marking is present, and it clamps transients regardless of voltage polarity across its terminals. This simplifies layout on AC-coupled lines or differential buses like RS-485, eliminating need for orientation verification during assembly and supporting symmetric protection schemes without polarity constraints.
What is the thermal resistance and recommended PCB layout for SMAJ100CAHE3/5A?
SMAJ100CAHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To sustain full 400 W pulse rating, designers must adhere to this pad size and ensure adequate copper area and thermal vias - undersized pads cause premature thermal shutdown during repetitive surges.
Does SMAJ100CAHE3/5A meet RoHS and REACH requirements?
Yes, SMAJ100CAHE3/5A is RoHS-compliant per EU Directive 2011/65/EU and satisfies Vishay's material categorization per doc#99912. The "HE3" suffix confirms lead-free matte tin plating and absence of restricted substances - verified through certified lab testing and documented in Vishay's compliance portal. No exemptions are applied; full substance declaration is available upon request.
SMAJ100CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMAJ100CAHE3/5A FAQ
1.How can I place an order for SMAJ100CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100CAHE3/5A 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 SMAJ100CAHE3/5A reliable?
The price and inventory of SMAJ100CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ100CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100CAHE3/5A?
SMAJ100CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100CAHE3/5A 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 SMAJ100CAHE3/5A?
For technical support, including SMAJ100CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ100CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ100CAHE3/5A 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 SMAJ100CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ100CAHE3/5A?
All SMAJ100CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100CAHE3/5A, 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 SMAJ100CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ100CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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