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Vishay General Semiconductor - Diodes Division SMAJ188A-E3/61
- Part No.:
- SMAJ188A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ188A-E3/61.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,300
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Product details
Overview
SMAJ188A-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection on DC power rails and signal lines. It features a 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR) at 1 mA, 328 A peak pulse current (IPPM) under 10/1000 μs waveform, and clamps to ≤328 V at rated surge-used in automotive power supply inputs, industrial sensor interfaces, and telecom line cards.
For engineers reviewing the SMAJ188A-E3/61 datasheet, SMAJ188A-E3/61 pinout, SMAJ188A-E3/61 application, or SMAJ188A-E3/61 equivalent, key selection criteria include its 188 V stand-off rating, unidirectional polarity with cathode band marking, SMA (DO-214AC) surface-mount package, 400 W peak pulse power capability (derated to 300 W above 78 V), and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM = 188 V and rapidly transitions to low-impedance conduction once reverse voltage exceeds VBR = 209–231 V. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ps), enabling suppression of ESD, lightning-induced surges, and inductive switching transients.
Thermal design relies on RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), with maximum junction temperature TJ = +150 °C and operating range from –55 °C to +150 °C. It meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 209 V / 231 V at IT = 1 mA - Ensures reliable turn-on margin above VWM |
| IPPM | 328 A - Peak surge current it safely clamps under standardized 10/1000 μs waveform |
| VC @ IPPM | ≤328 V - Clamped voltage during full-rated surge, defining worst-case protected node voltage |
| PPPM | 400 W (≤78 V); 300 W (>78 V) - Peak pulse power handling, derated per thermal limits |
| IFSM | 40 A - Single half-sine surge rating (8.3 ms), relevant for AC-coupled fault events |
| TJ max. | +150 °C - Maximum junction temperature, constraining PCB copper area and ambient design |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected circuit ground or low-side reference; carries full surge current during clamping |
| Cathode | Reverse-biased terminal / Clamping control node | Marked with band; connected to line being protected; defines polarity and VWM threshold |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12–48 V systems |
| Glass passivated junction | Ensures stable, repeatable avalanche behavior across temperature and lifetime without parameter drift |
| MSL Level 1, 260 °C reflow compatible | Supports standard SMT assembly without moisture sensitivity concerns or baking requirements |
| AEC-Q101 qualification option | Available with HE3/HM3 suffixes for automotive applications requiring stress-tested reliability |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving system-level immunity margin |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 24 V battery-supplied ECUs exposed to load dump (ISO 16750-2) and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges >188 V. Use Value: Limits rail voltage to ≤328 V during 328 A surge, preventing damage to downstream DC-DC converters and microcontrollers. | Use Scenario: 4–20 mA current loop sensors in factory automation subject to cable ESD and inductive coupling. IC Role / Device Role / Timing Role: TVS mounted across signal and return lines to absorb ±8 kV contact ESD (IEC 61000-4-2). Use Value: Sub-nanosecond response clamps transients before op-amp input stages saturate or latch up. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: DSL or PoE-powered line cards interfacing with outside plant wiring vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: Primary protection stage on DC input, coordinated with GDT or MOV secondary stages. Use Value: 300 W power rating at 188 V enables coordination with upstream protectors while maintaining low let-through voltage. | Use Scenario: Brushed DC motor drivers in white goods where commutation spikes exceed 188 V on supply rails. IC Role / Device Role / Timing Role: TVS across H-bridge supply to clamp inductive kickback from motor windings. Use Value: 40 A IFSM rating handles repetitive commutation surges without degradation over 10,000+ cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ188A-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and package | No functional difference; selected when halogen-free compliance is mandated in final product | Choose M3/61 for environmental compliance programs requiring halogen-free materials |
| SMAJ170A-E3/61 | Lower VWM = 170 V, VBR = 189–209 V, IPPM = 275 A, VC = ≤275 V | Better suited for 15–24 V systems; insufficient margin for 188 V nominal rails | Select only if system nominal voltage is ≤170 V and lower clamping voltage is prioritized over stand-off headroom |
Compared with SMAJ188A-E3/61, the M3/61 offers identical protection performance with halogen-free construction, while SMAJ170A-E3/61 trades stand-off margin for tighter clamping-making the original part optimal for 188 V-rated or higher DC systems requiring both headroom and robust surge handling.
Availability
SMAJ188A-E3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom line cards, and consumer appliance motor drives requiring stable component supply and long-term production continuity.
Supply support for SMAJ188A-E3/61 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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting applications where consistent clamping performance, thermal stability, and AEC-Q101 readiness are critical.
FAQ
What is the stand-off voltage rating of the SMAJ188A-E3/61?
The SMAJ188A-E3/61 has a maximum reverse stand-off voltage (VWM) of 188 V, meaning it remains non-conductive up to this DC or RMS voltage level. This value ensures compatibility with 188 V nominal systems while providing sufficient margin before avalanche breakdown begins at 209–231 V.
Is the SMAJ188A-E3/61 unidirectional or bidirectional?
The SMAJ188A-E3/61 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only during reverse overvoltage events and blocks forward current-unlike bidirectional "CA" variants which protect both polarities.
What package does the SMAJ188A-E3/61 use, and is it RoHS-compliant?
The SMAJ188A-E3/61 uses the SMA (DO-214AC) surface-mount package and is RoHS-compliant per the "E3" suffix designation. It features matte tin-plated leads, meets J-STD-002 solderability, and is rated MSL Level 1 with 260 °C peak reflow tolerance.
Does the SMAJ188A-E3/61 meet AEC-Q101 qualification?
The base SMAJ188A-E3/61 is commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes like SMAJ188AHE3_A. These variants undergo additional stress testing for automotive use but share identical electrical parameters and SMA package with the E3/61 part.
What is the clamping voltage of the SMAJ188A-E3/61 at its rated peak pulse current?
At its rated peak pulse current (IPPM) of 328 A (10/1000 μs waveform), the SMAJ188A-E3/61 clamps to a maximum voltage (VC) of 328 V. This defines the upper voltage limit imposed on protected circuits during worst-case surge events.
SMAJ188A-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 188V
- Voltage - Breakdown (Min):
- 209V
- Voltage - Clamping (Max) @ Ipp:
- 328V
- Current - Peak Pulse (10/1000µs):
- 910mA
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ188A-E3/61 FAQ
1.How can I place an order for SMAJ188A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ188A-E3/61 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 SMAJ188A-E3/61 reliable?
The price and inventory of SMAJ188A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ188A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ188A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ188A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ188A-E3/61?
SMAJ188A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ188A-E3/61 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 SMAJ188A-E3/61?
For technical support, including SMAJ188A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ188A-E3/61 requirements.
6.How does Aetrix verify that SMAJ188A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ188A-E3/61 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 SMAJ188A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ188A-E3/61?
All SMAJ188A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ188A-E3/61, 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 SMAJ188A-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ188A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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