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Vishay General Semiconductor - Diodes Division SMAJ100CAHE3/61
- Part No.:
- SMAJ100CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100CAHE3/61.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,441
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Product details
Overview
SMAJ100CAHE3/61 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), 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 systems.
For engineers reviewing the SMAJ100CAHE3/61 datasheet, SMAJ100CAHE3/61 pinout, SMAJ100CAHE3/61 application, or SMAJ100CAHE3/61 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 symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while the SMA package supports high thermal dissipation via 0.2" × 0.2" copper pads per terminal.
The device complies with ANSI/IEEE C62.35 surge standards and delivers consistent clamping performance across -55 °C to +150 °C operating range. Its 120 °C/W junction-to-ambient thermal resistance and 30 °C/W junction-to-lead resistance define thermal limits under repetitive surge conditions, especially above 78 V where derated 300 W PPPM applies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - maximum continuous reverse voltage before clamping begins; defines safe operating margin for 12 V–48 V bus protection |
| VBR min/max | 111 V / 123 V at 1 mA - verified breakdown threshold 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 surge energy handling capacity with defined waveform and duty cycle |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - enables use in under-hood automotive environments and high-power industrial enclosures |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.28 mm × 4.50 mm footprint and matte tin leads |
Pinout & Package
Two-terminal bidirectional device in SMA (DO-214AC) package; no polarity marking required. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, rated MSL level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to protected line or ground return path |
| Cathode | Transient current exit (bidirectional) | Completes low-impedance path to reference plane; symmetrical with anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTRB, HTGB, and temperature cycling |
| 400 W peak pulse power | Withstands IEC 61000-4-5 surge waveforms up to 1.9 A (10/1000 μs) without degradation |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during clamping - critical for protecting 100 V-rated MOSFET gates |
| MSL Level 1 rating | Enables single-reflow assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump and jump-start transients on 24 V vehicle power distribution networks. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between battery rail and DC-DC converter input. Use Value: Limits voltage to ≤162 V during 120 V/100 ms load dump, preventing damage to downstream PMICs and microcontrollers. | Use Scenario: Shielding analog and digital sensor outputs (e.g., CAN, LIN, RS-485) from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor installed at connector interface before signal conditioning circuitry. Use Value: Clamps ±15 kV contact ESD per IEC 61000-4-2 with sub-nanosecond response, preserving signal fidelity below 10 MHz. |
| Telecom Line Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Guarding Ethernet PHY ports and PoE injectors against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on data pair lines, coordinated with gas discharge tube (GDT) secondary protection. Use Value: Absorbs 400 W surge energy per line pair while maintaining <1.0 μA leakage at 100 V, avoiding false link-down triggers. | Use Scenario: Protecting gate drivers and half-bridge MOSFETs in washing machine motor inverters from flyback spikes. IC Role / Device Role / Timing Role: Clamp across DC bus or gate-source terminals to limit dv/dt-induced shoot-through risk. Use Value: Withstands 40 A non-repetitive forward surge (IFSM) and clamps transients to 162 V, extending MOSFET lifetime in 20 kHz PWM operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected when halogen-free material compliance is mandated | Choose SMAJ100CA-M3/61 for green manufacturing programs requiring halogen-free bill-of-materials |
| SMBJ100CAHE3/61 | Same VWM/VC ratings but in larger SMB (DO-214AA) package; higher 600 W PPPM rating | Requires larger PCB footprint and offers higher surge margin; suited for higher-energy threat environments | Choose SMBJ100CAHE3/61 when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits |
Compared with SMAJ100CAHE3/61, the M3 variant adds halogen-free compliance without altering protection performance, while the SMBJ version trades compactness for 50 % higher surge power handling - enabling design flexibility across cost, footprint, and robustness tiers.
Availability
SMAJ100CAHE3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, telecom line surge protection, and consumer appliance motor drive protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMAJ100CAHE3/61 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, TVS devices, and optoelectronics with emphasis on reliability and automotive-grade qualification.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where precise clamping, low leakage, and long-term stability are mandatory.
FAQ
What is the maximum clamping voltage of SMAJ100CAHE3/61 under a 10/1000 μs surge?
The SMAJ100CAHE3/61 has a maximum clamping voltage (VC) of 162 V when subjected to its rated peak pulse current of 1.9 A with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for downstream components such as 100 V MOSFETs or 120 V-rated regulators in the protected circuit.
Is SMAJ100CAHE3/61 suitable for automotive applications?
Yes, SMAJ100CAHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It meets stress test requirements including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. Its 150 °C maximum junction temperature and robust glass-passivated junction make it appropriate for engine control units, body electronics, and ADAS power domains where reliability under thermal and electrical stress is critical.
What does the "CA" suffix indicate in SMAJ100CAHE3/61?
The "CA" suffix in SMAJ100CAHE3/61 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical breakdown and clamping characteristics in either direction. Unlike unidirectional "A" variants, SMAJ100CAHE3/61 has no cathode marking and is used where AC signals, floating references, or dual-rail protection require polarity-agnostic clamping, such as on differential bus lines or transformer-coupled interfaces.
What is the thermal resistance of SMAJ100CAHE3/61, and how does it affect layout?
SMAJ100CAHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W. These values assume mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation under repetitive surges, PCB layout must provide adequate copper area and thermal vias - undersized pads increase junction temperature and reduce surge endurance, particularly above 78 V where PPPM is derated to 300 W.
How does SMAJ100CAHE3/61 compare to SMAJ100AHE3/61 in terms of functionality?
SMAJ100CAHE3/61 is bidirectional with symmetrical clamping, while SMAJ100AHE3/61 is unidirectional and features a cathode band marking. The "CA" version supports AC-coupled or floating-line protection without polarity constraints, whereas the "A" version requires correct orientation relative to ground and offers slightly lower leakage (0.5 μA vs. 1.0 μA at VWM). Both share identical VWM (100 V), VC (162 V), and PPPM (400 W), but only SMAJ100CAHE3/61 is suitable for applications like RS-485 or CAN bus where signal polarity reverses.
SMAJ100CAHE3/61 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)
SMAJ100CAHE3/61 FAQ
1.How can I place an order for SMAJ100CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100CAHE3/61 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 SMAJ100CAHE3/61 reliable?
The price and inventory of SMAJ100CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ100CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100CAHE3/61?
SMAJ100CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100CAHE3/61 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 SMAJ100CAHE3/61?
For technical support, including SMAJ100CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ100CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ100CAHE3/61 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 SMAJ100CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ100CAHE3/61?
All SMAJ100CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100CAHE3/61, 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 SMAJ100CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ100CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100CAHE3/61 Tags
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