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Vishay General Semiconductor - Diodes Division SMAJ170AHE3/61
- Part No.:
- SMAJ170AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ170AHE3/61.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,692
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Product details
Overview
SMAJ170AHE3/61 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 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR) at 1 mA, 275 V maximum clamping voltage (VC) at 1.09 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMAJ170AHE3/61 datasheet, SMAJ170AHE3/61 pinout, SMAJ170AHE3/61 application, or SMAJ170AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1.09 A IPPM at VC = 275 V, 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 protector, entering avalanche conduction when reverse voltage exceeds its VBR range (189–209 V). Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and low incremental surge resistance, enabling precise clamping within nanoseconds of transient onset.
The device is rated for 400 W peak pulse power (derated to 300 W above 78 V), supports 40 A non-repetitive forward surge current (IFSM), and maintains operation across -55 °C to +150 °C junction temperature range. Its SMA package meets MSL Level 1 and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 189 V / 209 V at 1 mA - Ensures reliable turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 275 V at 1.09 A - Clamped voltage during 10/1000 μs surge; defines worst-case stress on downstream circuitry |
| PPPM | 400 W (10/1000 μs) - Peak transient energy absorption capability under standard test waveform |
| ID @ VWM | <1.0 μA - Ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max. | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments |
| RθJA | 120 °C/W - Thermal resistance dictates required PCB copper area (0.2" × 0.2" pads per terminal) for safe power dissipation |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage events |
| Cathode | Avalanche conduction node / protected line connection | Connected to line being protected (e.g., 170 V rail); conducts surge current to anode when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass passivated junction | Stable VBR and low ID drift over time and temperature; eliminates risk of junction corrosion |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V–170 V systems with margin |
| Low profile SMA package | 0.208" × 0.157" footprint enables compact layout near connectors or IC inputs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V–24 V supply rails in engine control units (ECUs) and body control modules against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between rail and chassis ground to clamp spikes up to 120 V while maintaining 170 V system headroom. Use Value: Prevents latch-up or permanent damage to microcontrollers and power management ICs during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Fast-response clamping element connected across sensor output and local ground to suppress EFT bursts and cable discharge events. Use Value: Maintains signal fidelity and prevents false readings or ADC saturation during 4 kV contact ESD (IEC 61000-4-2) exposure. |
| Telecom DC Power Input Protection | Motor Drive Gate Driver Protection |
|
Use Scenario: Shielding 48 V telecom rectifier outputs from lightning-induced surges on outdoor cabinet feeds. IC Role / Device Role / Timing Role: Primary-level TVS on input stage, coordinated with upstream MOVs to handle high-energy transients before they reach DC/DC converters. Use Value: Limits let-through voltage to <275 V, ensuring downstream silicon remains within absolute maximum ratings during 10/1000 μs surges. |
Use Scenario: Guarding high-side gate driver ICs in BLDC motor inverters against Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Localized clamping device across gate-source terminals or bootstrap supply rails to suppress dV/dt overshoot. Use Value: Reduces risk of unintended turn-on or gate oxide stress by limiting transient excursions to ≤275 V with sub-nanosecond response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170A-E3/61 | Commercial-grade version; lacks AEC-Q101 qualification and halogen-free certification | Suitable for non-automotive industrial or consumer designs where automotive reliability is not mandated | Select SMAJ170AHE3/61 when automotive qualification, extended temperature validation, or halogen-free compliance is required |
| SMAJ170AHM3/61 | Halogen-free, RoHS-compliant, and AEC-Q101 qualified - identical electrical specs but different plating chemistry | Preferred for automotive OEMs requiring halogen-free BOMs and full PPAP documentation support | Choose SMAJ170AHM3/61 if halogen-free material declaration (e.g., IEC 61249-2-21) is mandatory for your supply chain |
Compared with SMAJ170A-E3/61 and SMAJ170AHM3/61, the SMAJ170AHE3/61 provides AEC-Q101 qualification and RoHS compliance without halogen restrictions - making it optimal for cost-sensitive automotive Tier 2 suppliers needing validated reliability but no halogen-free reporting.
Availability
SMAJ170AHE3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and motor drive gate protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMAJ170AHE3/61 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, high-power TVS protection in compact surface-mount packages - engineered specifically for robust transient immunity in automotive, industrial, and communications infrastructure.
FAQ
What is the clamping voltage of SMAJ170AHE3/61 at its rated peak pulse current?
The SMAJ170AHE3/61 has a maximum clamping voltage (VC) of 275 V at 1.09 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMAJ170AHE3/61 achieves this clamping performance while maintaining low leakage and fast response.
Is SMAJ170AHE3/61 qualified for automotive applications?
Yes, SMAJ170AHE3/61 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness required for automotive electronic systems. This qualification confirms its suitability for under-hood and cabin applications such as engine control, ADAS sensors, and infotainment power rails - distinguishing it from commercial-grade variants like SMAJ170A-E3/61.
What is the package type and mounting requirement for SMAJ170AHE3/61?
SMAJ170AHE3/61 uses the SMA (DO-214AC) surface-mount package, with dimensions of 4.93 mm × 3.99 mm and a maximum height of 2.29 mm. It requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for proper thermal dissipation and peak pulse power handling. The device is MSL Level 1 compliant and compatible with standard lead-free reflow profiles peaking at 260 °C.
How does SMAJ170AHE3/61 differ from bidirectional TVS diodes like SMAJ170CA?
SMAJ170AHE3/61 is unidirectional and features a cathode band marking, allowing it to conduct only in reverse avalanche mode - ideal for DC power line protection where polarity is fixed. In contrast, SMAJ170CA is bidirectional with no polarity marking and symmetrical clamping in both directions, suited for AC signal lines or differential buses. Their VBR and VC values differ accordingly, and they are not interchangeable without circuit redesign.
What is the maximum reverse leakage current of SMAJ170AHE3/61 at its stand-off voltage?
The SMAJ170AHE3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 170 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal impact on system power budget and signal integrity in high-impedance circuits such as sensor bias networks or precision reference paths. Leakage remains well-controlled across the full operating temperature range due to its glass-passivated junction structure.
SMAJ170AHE3/61 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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 1.09A
- 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)
SMAJ170AHE3/61 FAQ
1.How can I place an order for SMAJ170AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ170AHE3/61 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 SMAJ170AHE3/61 reliable?
The price and inventory of SMAJ170AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ170AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ170AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ170AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ170AHE3/61?
SMAJ170AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ170AHE3/61 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 SMAJ170AHE3/61?
For technical support, including SMAJ170AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ170AHE3/61 requirements.
6.How does Aetrix verify that SMAJ170AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ170AHE3/61 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 SMAJ170AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ170AHE3/61?
All SMAJ170AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ170AHE3/61, 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 SMAJ170AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ170AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ170AHE3/61 Tags
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