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Vishay General Semiconductor - Diodes Division SMAJ17-E3/61
- Part No.:
- SMAJ17-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17-E3/61.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,653
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Product details
Overview
SMAJ17-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping transient overvoltages on power and signal lines. It features 17 V standoff voltage (VWM), 30.5 V maximum clamping voltage (VC) at 13.1 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial control and automotive subsystems.
For engineers reviewing the SMAJ17-E3/61 datasheet, SMAJ17-E3/61 pinout, SMAJ17-E3/61 application, or SMAJ17-E3/61 equivalent, key selection criteria include its unidirectional polarity, 1.0 µA max reverse leakage at VWM, 150 °C junction temperature rating, RoHS-compliant matte tin plating, and MSL Level 1 moisture sensitivity per J-STD-020.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ) below 17 V, then rapidly avalanches to limit transient energy above its breakdown threshold (18.9–23.1 V at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
The device is rated for 40 A non-repetitive forward surge current (IFSM) in 8.3 ms half-sine wave, supports automated SMT placement, and meets UL 94 V-0 flammability requirements in its DO-214AC molded case. Thermal resistance is 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working range for protected line. |
| VBR (min/max) | 18.9 V / 23.1 V at 1 mA - Breakdown voltage range confirming reliable turn-on margin above VWM. |
| VC @ IPPM | 30.5 V at 13.1 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream circuitry. |
| PPPM | 400 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges when properly laid out. |
| IPPM | 13.1 A - Peak surge current supported at VC; used with PCB trace inductance to calculate actual clamping performance. |
| Reverse Leakage | 1.0 µA max at 17 V - Negligible standby power loss and minimal impact on high-impedance signal integrity. |
| Junction Temp | -55 °C to +150 °C - Enables operation in under-hood automotive and industrial environments without derating. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-axis molded case with cathode band marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); weight 0.064 g; RoHS-compliant matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential rail; forms current path during reverse-biased clamping event. |
| Cathode (banded end) | High-side transient input terminal | Connected to protected line (e.g., 12 V supply or CAN_H); avalanche conduction occurs from cathode to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche behavior across temperature and lifetime; eliminates parameter drift due to surface contamination. |
| 400 W peak pulse power (10/1000 µs) | Supports robust protection against lightning-induced surges and inductive switching transients in 12 V/24 V systems. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow assembly without preconditioning; eliminates moisture-related popcorning risk. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity for sensitive logic. |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for automotive and industrial safety-critical applications. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges exceeding 17 V. Use Value: Limits peak voltage to ≤30.5 V during 13.1 A transients, preventing damage to 36 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in PLC modules. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) TVS connected across signal and return to suppress ESD and cable discharge events. Use Value: 1.0 µA leakage preserves millivolt-level signal accuracy; fast response prevents latch-up in op-amp front-ends. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Secondary-side transient suppression on -48 V telecom distribution boards exposed to induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at board edge to divert common-mode surges before reaching DC/DC isolation stage. Use Value: 400 W rating handles repetitive 10/1000 µs surges up to 0.01% duty cycle; thermal resistance allows sustained operation at 75 °C ambient. |
Use Scenario: Input-stage overvoltage clamping in universal-input AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: TVS placed after bridge rectifier to absorb line-switching spikes and capacitor discharge energy. Use Value: 150 °C max junction temperature accommodates enclosed thermal environments; RoHS/EU compliance meets regional regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/61 | Lower VBR range (18.9–20.9 V), tighter tolerance; clamps at 27.6 V @ 14.5 A. | Better suited for precision 17 V rails where tighter VBR minimizes unnecessary conduction near VWM. | Select SMAJ17A-E3/61 when system margin requires reduced clamping voltage and tighter breakdown consistency. |
| SMBJ17A-E3/52 | Same VWM/VC specs but in larger DO-214AA (SMB) package; higher PPPM = 600 W. | Used where higher surge energy handling is required and PCB space permits larger footprint. | Choose SMBJ17A-E3/52 only if layout allows SMB package and application demands >400 W pulse power. |
Compared with SMAJ17-E3/61, the SMAJ17A-E3/61 offers improved VBR consistency for tighter voltage margins, while the SMBJ17A-E3/52 trades compactness for higher surge capacity - neither is pin-compatible due to differing package footprints and thermal profiles.
Availability
SMAJ17-E3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and telecom line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ17-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMAJ series was developed for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and robust surge handling are critical.
FAQ
What is the polarity configuration of SMAJ17-E3/61?
SMAJ17-E3/61 is a unidirectional TVS diode, with the banded end denoting the cathode. It conducts only when the cathode is biased positively relative to the anode - making it appropriate for DC power rail protection where polarity is fixed. This differs from bi-directional variants (e.g., SMAJ17CA) that protect AC or bidirectional signal lines.
Does SMAJ17-E3/61 meet automotive qualification standards?
SMAJ17-E3/61 is commercial-grade (E3 suffix) and RoHS-compliant but not AEC-Q101 qualified. For automotive applications requiring qualification, the HE3-suffix variant (e.g., SMAJ17HE3/61) must be selected - it undergoes extended reliability testing including temperature cycling, humidity bias, and mechanical shock per AEC-Q101.
What is the maximum clamping voltage of SMAJ17-E3/61 under surge conditions?
The maximum clamping voltage of SMAJ17-E3/61 is 30.5 V, measured at 13.1 A peak pulse current using the standardized 10/1000 µs double-exponential waveform. This value represents the worst-case voltage seen by downstream components during a full-rated surge event.
Can SMAJ17-E3/61 be used in place of SMAJ17A-E3/61?
No - SMAJ17-E3/61 and SMAJ17A-E3/61 are not interchangeable without circuit review. SMAJ17-E3/61 has a wider VBR range (18.9–23.1 V) versus SMAJ17A-E3/61 (18.9–20.9 V), resulting in higher clamping voltage (30.5 V vs. 27.6 V). Substitution may compromise protection margin in tightly regulated 17 V systems.
What PCB pad layout is recommended for optimal thermal performance of SMAJ17-E3/61?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for SMAJ17-E3/61 to achieve rated 400 W pulse power. Smaller pads reduce thermal dissipation, causing premature thermal runaway during repetitive surges - especially above 75 °C ambient.
SMAJ17-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ17-E3/61 FAQ
1.How can I place an order for SMAJ17-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17-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 SMAJ17-E3/61 reliable?
The price and inventory of SMAJ17-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 SMAJ17-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ17-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17-E3/61?
SMAJ17-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17-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 SMAJ17-E3/61?
For technical support, including SMAJ17-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17-E3/61 requirements.
6.How does Aetrix verify that SMAJ17-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ17-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 SMAJ17-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ17-E3/61?
All SMAJ17-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17-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 SMAJ17-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ17-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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