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Vishay General Semiconductor - Diodes Division SMAJ17HE3/5A
- Part No.:
- SMAJ17HE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17HE3/5A.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,290
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Product details
Overview
SMAJ17HE3/5A from Vishay General Semiconductor is a high-reliability, AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive and industrial overvoltage protection. It features 17 V stand-off voltage (VWM), 30.5 V maximum clamping voltage (VC) at 13.1 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), protecting MOSFETs and ICs against inductive switching transients.
For engineers reviewing the SMAJ17HE3/5A datasheet, SMAJ17HE3/5A pinout, SMAJ17HE3/5A application, or SMAJ17HE3/5A equivalent, this device serves as a RoHS-compliant, high-reliability TVS for automotive-grade ESD and surge suppression where stable clamping, low leakage (<1 µA at 17 V), and MSL Level 1 solderability are required.
Technical Context
This unidirectional TVS operates by avalanche breakdown above its 18.9–23.1 V breakdown voltage (VBR at 1 mA), clamping transients to ≤30.5 V while sustaining 400 W (≤78 V) peak pulse power. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response time (<1 ns), critical for protecting sensitive signal lines and power rails.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation up to +150 °C junction temperature. The HE3 suffix confirms AEC-Q101 qualification, matte tin plating, and JESD201 Class 2 whisker resistance-key for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before conduction begins |
| VC @ IPPM | 30.5 V - Clamped voltage during 13.1 A 10/1000 µs surge, limiting stress on downstream components |
| IPPM | 13.1 A - Peak surge current capability with 10/1000 µs waveform, defining transient energy handling |
| PPPM | 400 W - Peak pulse power rating (≤78 V), supporting robust protection against repetitive surges |
| ID @ VWM | <1 µA - Reverse leakage at 17 V, minimizing standby power loss in battery-powered systems |
| TJ Range | −55 °C to +150 °C - Full automotive temperature range support without derating below 78 V |
| Package | DO-214AC (SMA) - Surface-mount footprint compatible with automated placement and IPC-7351 standard pads |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads; cathode indicated by band; compliant with UL 94 V-0; MSL Level 1 (260 °C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (uni-directional) | Connected to protected line's low-side or ground return path during clamping |
| Cathode (banded end) | Avalanche conduction terminal | Connected to protected line's high-side; conducts when transient exceeds VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including thermal cycling, humidity, and mechanical shock |
| Glass-passivated junction | Ensures stable VBR tolerance and low parametric drift over lifetime and temperature |
| 400 W peak pulse power (10/1000 µs) | Handles ISO 7637-2 Pulse 1/2a/5a transients without degradation in 12 V/24 V systems |
| MSL Level 1, 260 °C reflow | Supports lead-free assembly without popcorn cracking or delamination |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability automotive modules over 15+ year service life |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp spikes to ≤30.5 V. Use Value: Prevents LDO overvoltage failure during ISO 7637-2 Pulse 5a (75 V/100 ms), extending system MTBF. | Use Scenario: Shielding analog outputs of pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at connector interface to absorb ESD (IEC 61000-4-2 ±8 kV) and cable discharge events. Use Value: Limits induced voltage to <31 V, preserving 16-bit ADC accuracy and preventing op-amp latch-up. |
| Consumer Power Adapter Inputs | Telecom DC Feeds |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier and controller ICs against lightning-induced surges. IC Role / Device Role / Timing Role: Placed across bridge rectifier output to clamp line-to-line transients before bulk capacitor. Use Value: Withstands 400 W pulses without degradation, eliminating need for redundant MOVs in compact designs. | Use Scenario: Protecting PoE (IEEE 802.3af/at) powered device front-end from Ethernet cable ESD and surge coupling. IC Role / Device Role / Timing Role: Bi-directional-capable variant not applicable; SMAJ17HE3/5A used on DC feed side only for unidirectional clamping. Use Value: Clamps common-mode surges to ≤30.5 V, ensuring IEEE 802.3 compliance without compromising 48 V DC integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17AHE3/5A | Lower VBR range (18.9–20.9 V), tighter 5% VWM tolerance (vs. 10%), same package and AEC-Q101 grade | Better suited for precision 17 V rail protection where tighter VWM margin prevents false triggering | Select SMAJ17AHE3/5A when design requires guaranteed ≤17.0 V stand-off with minimal tolerance spread |
| SMBJ17HE3/5A | Same VWM/VC specs but in larger DO-214AA (SMB) package; 600 W PPPM rating | Higher power handling supports longer-duration surges (e.g., ISO 16750-2 load dump) but requires 30% more PCB area | Choose SMBJ17HE3/5A only if 600 W surge capacity is mandatory and board space allows DO-214AA footprint |
Compared with SMAJ17HE3/5A, SMAJ17AHE3/5A offers tighter voltage tolerance for critical 17 V rails, while SMBJ17HE3/5A trades smaller size for higher surge power-neither is pin-compatible due to differing package footprints, requiring layout revision.
Availability
SMAJ17HE3/5A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, consumer power adapters, and telecom DC feeds requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMAJ17HE3/5A 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, efficiency, and automotive qualification.
The SMAJ series is engineered specifically for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the SMAJ17HE3/5A under a 10/1000 µs surge?
The SMAJ17HE3/5A has a maximum clamping voltage (VC) of 30.5 V when subjected to its rated peak pulse current of 13.1 A with a 10/1000 µs waveform. This value is measured per Fig. 1 and Fig. 3 in Vishay document 88390 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ17HE3/5A maintains this clamping performance across its full operating temperature range.
Is SMAJ17HE3/5A suitable for automotive applications?
Yes, SMAJ17HE3/5A is explicitly qualified to AEC-Q101 standards and carries the HE3 suffix denoting high-reliability automotive grade. It meets JESD201 Class 2 whisker resistance, MSL Level 1 reflow compatibility (260 °C), and operates from −55 °C to +150 °C. These attributes make SMAJ17HE3/5A appropriate for engine control units, body electronics, and ADAS power domains where long-term reliability under thermal and mechanical stress is essential.
What does the "HE3" suffix mean in SMAJ17HE3/5A?
The "HE3" suffix in SMAJ17HE3/5A indicates RoHS-compliant, high-reliability/automotive-grade construction: matte tin-plated leads compliant with J-STD-002 and JESD22-B102, JESD201 Class 2 whisker resistance, and full AEC-Q101 qualification. It distinguishes SMAJ17HE3/5A from commercial-grade "E3" variants and confirms suitability for mission-critical automotive deployments. The SMAJ17HE3/5A data sheet (Doc. 88390) explicitly references this qualification in the Mechanical Data section.
How does SMAJ17HE3/5A differ from SMAJ17AHE3/5A?
SMAJ17HE3/5A has a VBR range of 18.9–23.1 V and 10% VWM tolerance (17 V ±10%), whereas SMAJ17AHE3/5A specifies 18.9–20.9 V VBR and tighter 5% VWM tolerance. Both share identical package, AEC-Q101 qualification, and thermal specs. The SMAJ17HE3/5A is optimized for general-purpose 17 V rail protection, while SMAJ17AHE3/5A targets designs needing stricter voltage margin control-both are valid choices depending on system tolerance requirements.
What is the reverse leakage current of SMAJ17HE3/5A at its rated stand-off voltage?
At its rated stand-off voltage of 17 V and TA = 25 °C, the SMAJ17HE3/5A exhibits a maximum reverse leakage current (ID) of 1 µA. This low leakage ensures minimal power drain in always-on automotive circuits and preserves battery life in infotainment and telematics modules. The specification is confirmed in Table 1 of Vishay document 88390 and applies across the full −55 °C to +125 °C operating range.
SMAJ17HE3/5A 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ17HE3/5A FAQ
1.How can I place an order for SMAJ17HE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17HE3/5A 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 SMAJ17HE3/5A reliable?
The price and inventory of SMAJ17HE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ17HE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ17HE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17HE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17HE3/5A?
SMAJ17HE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17HE3/5A 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 SMAJ17HE3/5A?
For technical support, including SMAJ17HE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17HE3/5A requirements.
6.How does Aetrix verify that SMAJ17HE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ17HE3/5A 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 SMAJ17HE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ17HE3/5A?
All SMAJ17HE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17HE3/5A, 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 SMAJ17HE3/5A part is unused and in its original packaging.
Return procedure for SMAJ17HE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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