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Vishay General Semiconductor - Diodes Division SMAJ100AHE3/61
- Part No.:
- SMAJ100AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100AHE3/61.pdf
- Description:
- TVS DIODE 100VWM 162VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,334
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Product details
Overview
SMAJ100AHE3/61 from Vishay General Semiconductor is a unidirectional 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 power supplies.
For engineers reviewing the SMAJ100AHE3/61 datasheet, SMAJ100AHE3/61 pinout, SMAJ100AHE3/61 application, or SMAJ100AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, clamping performance under 10/1000 μs surge, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during overvoltage events, leveraging an avalanche breakdown mechanism to divert surge current away from protected circuitry. Its glass-passivated junction ensures stable reverse leakage (<1.0 μA at VWM) and low incremental surge resistance, enabling consistent clamping within 1 ns response time.
The device is rated for repetitive 400 W pulses (duty cycle 0.01 %) up to TJ = 150 °C, with derating above TA = 25 °C per Figure 2. It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak temperature - critical for automotive-grade reliability in engine control units and ADAS power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 100 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 111–123 V at IT = 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 162 V at IPPM = 1.9 A - peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - energy-handling capability; sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges |
| RθJA | 120 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal design requirements |
| IFSM | 40 A - non-repetitive forward surge rating (8.3 ms half-sine); validates robustness against accidental forward faults |
| Polarity | Unidirectional - cathode marked with band; blocks reverse conduction, enabling DC-biased rail protection |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by molded band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full IPPM during clamping event |
| Cathode | Protected line connection / Clamping node | Connected to line being protected (e.g., 12 V rail); voltage referenced to anode during avalanche conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain and body electronics per stress test requirements |
| 400 W peak pulse power (10/1000 μs) | Supports robust protection against load dump and inductive switching transients in 12 V/24 V systems |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly |
| Glass passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; improves long-term reliability in harsh environments |
| Low profile SMA package | 0.208" × 0.157" footprint fits space-constrained layouts; compatible with IPC-7351B standard pad dimensions |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply lines in engine control modules from ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump). IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and local regulator input. Use Value: Limits transient voltage to ≤162 V, preventing damage to 36 V-rated LDOs and microcontrollers downstream. |
Use Scenario: Safeguarding analog output lines of pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb ESD and cable discharge events per IEC 61000-4-2. Use Value: Clamps 8 kV contact ESD to <162 V within <1 ns, preserving 12-bit ADC accuracy and avoiding latch-up. |
| DC-DC Converter Input Protection | Telecom Line Card Surge Suppression |
|
Use Scenario: Front-end protection for 48 V input of isolated flyback converters in telecom power supplies. IC Role / Device Role / Timing Role: Primary transient suppressor on bulk input capacitor rail prior to active rectification stage. Use Value: Absorbs 400 W surges without degradation, maintaining converter uptime during lightning-induced grid disturbances. |
Use Scenario: Secondary-side protection on -48 V bias rails of optical line terminal (OLT) cards exposed to induced surges. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, coordinated with upstream GDTs. Use Value: Provides precise 100 V standoff and 162 V clamping to avoid false triggering of under-voltage lockout circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A-E3/61 | No AEC-Q101 qualification; commercial grade only; identical electrical specs and package | Suitable for non-automotive industrial or consumer use where automotive reliability certification is not required | Select SMAJ100AHE3/61 when AEC-Q101 compliance is mandatory for OEM automotive programs. |
| SMBJ100AHE3/61 | Higher 600 W PPPM rating; SMB package (DO-214AA) with larger thermal mass and 15% larger footprint | Better suited for higher-energy surges or elevated ambient temperatures due to lower RθJA (85 °C/W) | Choose SMBJ100AHE3/61 if system-level testing reveals marginal clamping margin or thermal derating concerns with SMAJ100AHE3/61. |
Compared with SMAJ100A-E3/61, SMAJ100AHE3/61 adds AEC-Q101 qualification without altering electrical performance; versus SMBJ100AHE3/61, it trades pulse power headroom and thermal margin for smaller board area and lower cost in space-constrained automotive modules.
Availability
SMAJ100AHE3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMAJ100AHE3/61 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMAJ series delivers standardized, AEC-Q101-qualified TVS diodes optimized for automotive and industrial transient protection - balancing compact size, repeatable clamping, and proven field reliability in harsh environments.
FAQ
What is the clamping voltage of SMAJ100AHE3/61 at its rated peak pulse current?
The SMAJ100AHE3/61 has a maximum clamping voltage (VC) of 162 V at a peak pulse current (IPPM) of 1.9 A with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ100AHE3/61 maintains this clamping performance across its specified operating temperature range.
Is SMAJ100AHE3/61 qualified for automotive applications?
Yes, SMAJ100AHE3/61 is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control units, body control modules, and ADAS power supplies. The HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction, validated per stress test requirements for temperature cycling, humidity, and mechanical shock.
What is the thermal resistance of SMAJ100AHE3/61, and how does it affect PCB layout?
The SMAJ100AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads per Vishay's recommended layout. This value directly impacts allowable power dissipation: at 25 °C ambient, sustained 3.3 W operation requires careful copper area allocation. For higher ambient or pulsed duty cycles, designers must verify junction temperature using RθJA and actual power dissipation profiles.
How does the unidirectional configuration of SMAJ100AHE3/61 influence its placement in a circuit?
The unidirectional configuration of SMAJ100AHE3/61 requires correct orientation: the cathode (marked band) connects to the line being protected, and the anode connects to ground or return. This allows it to block reverse voltage while clamping positive transients - ideal for DC-biased rails like 12 V or 48 V supplies. Incorrect polarity prevents clamping and risks device failure during overvoltage events.
What packaging format is used for SMAJ100AHE3/61, and what does the "/61" suffix indicate?
SMAJ100AHE3/61 is supplied in 7" diameter plastic tape and reel format, with 1800 units per reel. The "/61" suffix denotes the preferred package code per Vishay's ordering system, specifying tape width, reel size, and carrier specifications compliant with EIA-481 standards - ensuring compatibility with high-speed pick-and-place equipment in automated SMT lines.
SMAJ100AHE3/61 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ100AHE3/61 FAQ
1.How can I place an order for SMAJ100AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100AHE3/61 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 SMAJ100AHE3/61 reliable?
The price and inventory of SMAJ100AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ100AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ100AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ100AHE3/61?
SMAJ100AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100AHE3/61 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 SMAJ100AHE3/61?
For technical support, including SMAJ100AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100AHE3/61 requirements.
6.How does Aetrix verify that SMAJ100AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ100AHE3/61 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 SMAJ100AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ100AHE3/61?
All SMAJ100AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100AHE3/61, 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 SMAJ100AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ100AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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