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Vishay General Semiconductor - Diodes Division SMA5J17AHM3/H
- Part No.:
- SMA5J17AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J17AHM3/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,568
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Product details
Overview
SMA5J17AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR), 27.6 V clamping voltage at 18.1 A peak pulse current, 500 W peak pulse power rating, and operates from –55 °C to +150 °C junction temperature.
For engineers reviewing the SMA5J17AHM3/H datasheet, SMA5J17AHM3/H pinout, SMA5J17AHM3/H application, or SMA5J17AHM3/H equivalent, this part serves as a halogen-free, RoHS-compliant, AEC-Q101 qualified TVS for automotive power rail and sensor interface protection where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve low incremental surge resistance and excellent clamping performance under 10/1000 µs transients. Its thermal resistance (RθJA = 80 °C/W) and junction-to-lead resistance (RθJL = 25 °C/W) support reliable operation on standard 5.0 mm × 5.0 mm copper pads with no derating required up to 25 °C ambient.
The SMA5J17AHM3/H complies with JESD201 Class 2 whisker testing and meets MSL Level 1 per J-STD-020 (peak reflow 260 °C). Its matte tin-plated leads ensure solderability per J-STD-002 and JESD22-B102, and polarity is marked by a cathode band on the SMA case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC bias margin for protected circuitry. |
| VBR (min/max) | 18.9 V / 20.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold across production lots. |
| VC @ IPPM | 27.6 V - Clamped voltage at 18.1 A peak pulse current (10/1000 µs); limits downstream voltage stress during surge events. |
| PPPM | 500 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems. |
| IPPM | 18.1 A - Maximum non-repetitive peak surge current supported; derived from 500 W / 27.6 V clamping condition. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive placement without thermal derating penalties. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint; compatible with automated pick-and-place and reflow processes. |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, cathode indicated by a band on one end. Mounting requires minimum 5.0 mm × 5.0 mm copper pads per terminal per Vishay recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage return path; forms current path during reverse-biased surge conduction. |
| Cathode | Protected line input | Connected to line being protected (e.g., 12 V rail or sensor output); carries surge current into anode during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | Meets automotive environmental requirements (Vishay HM3 suffix); eliminates brominated flame retardants without compromising UL 94 V-0 flammability rating. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; supports use in engine control units and ADAS sensor modules. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to downstream ICs (e.g., CAN transceivers or microcontrollers) during 10/1000 µs surges. |
| Fast response time (<1 ns) | Clamps transients before sensitive semiconductor junctions experience avalanche breakdown or latch-up. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard SMT reflow without baking; simplifies manufacturing logistics for high-volume automotive assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive-going surges above 17 V. Use Value: Limits peak voltage to 27.6 V during 18.1 A surges, preventing damage to 36 V-rated LDOs and MCU power supplies. |
Use Scenario: Shielding analog outputs of pressure or temperature sensors from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to shunt fast transients before reaching ADC input stages. Use Value: Sub-1 ns response ensures clamping occurs before 12-bit SAR ADC sampling windows, preserving measurement integrity. |
| Automotive CAN Bus Node Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding CAN transceiver supply pins (VCC) against coupled surges from nearby high-current switching in vehicle body controllers. IC Role / Device Role / Timing Role: Unidirectional TVS on transceiver VCC rail, referenced to ground, absorbing energy from inductive kickback. Use Value: 500 W rating sustains multiple ISO 16750-2 surge pulses without degradation, extending node lifetime in harsh environments. |
Use Scenario: Front-end surge suppression in universal AC/DC adapters subjected to lightning-induced surges on mains input. IC Role / Device Role / Timing Role: TVS placed after bridge rectifier to clamp secondary-side overvoltages before primary-side controller feedback loop. Use Value: 17 V VWM aligns with 24 V nominal DC bus; 27.6 V clamping prevents optocoupler LED overvoltage and controller latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J17AHE3/H | Same electrical specs and package, but RoHS-compliant commercial grade (not AEC-Q101 qualified); uses standard SnPb-free plating without halogen-free molding compound. | Lacks automotive qualification; suitable for industrial or consumer applications where AEC-Q101 is not mandated. | Select SMA5J17AHE3/H when cost sensitivity outweighs automotive reliability requirements and halogen-free status is optional. |
| SMA6J17A-M3/H | 600 W peak pulse power (vs. 500 W), same VWM/VBR/VC; identical SMA package and AEC-Q101/halogen-free compliance (HM3 suffix). | Higher energy handling enables longer surge duration immunity (e.g., extended ISO 7637-2 Pulse 5a tail) without derating. | Choose SMA6J17A-M3/H when system-level surge testing exceeds 500 W limits or when future-proofing against higher-energy threats is required. |
Compared with SMA5J17AHM3/H, SMA5J17AHE3/H trades automotive qualification for lower cost in non-automotive roles, while SMA6J17A-M3/H delivers 20 % higher surge energy capacity in the same footprint-enabling design margin extension without PCB layout changes.
Availability
SMA5J17AHM3/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and CAN bus node safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMA5J17AHM3/H 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, efficiency, and automotive-grade qualification.
The SMA5J series was developed specifically for high-power-density transient suppression in space-constrained automotive and industrial systems, combining AEC-Q101 validation with halogen-free materials and industry-standard SMA packaging.
FAQ
What is the clamping voltage of the SMA5J17AHM3/H under maximum surge conditions?
The SMA5J17AHM3/H exhibits a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current of 18.1 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C on recommended copper pad layout and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J17AHM3/H maintains this clamping performance across its full operating temperature range.
Is the SMA5J17AHM3/H suitable for automotive applications?
Yes, the SMA5J17AHM3/H is explicitly AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), making it suitable for under-hood and chassis-mounted automotive electronics. It has passed temperature cycling, highly accelerated life testing, and ESD validation per AEC-Q101 Rev D. The SMA5J17AHM3/H is commonly deployed in engine control units, body control modules, and ADAS sensor nodes.
How does the SMA5J17AHM3/H differ from the SMA5J17A-E3/H variant?
The SMA5J17AHM3/H differs from SMA5J17A-E3/H in three key aspects: it uses halogen-free molding compound (vs. standard RoHS), carries AEC-Q101 qualification (vs. commercial grade only), and employs JESD201 Class 2 whisker-resistant plating (same as E3). Both share identical electrical parameters and SMA package dimensions, but SMA5J17AHM3/H is designated for automotive use where material compliance and qualification are mandatory.
What is the thermal resistance of the SMA5J17AHM3/H, and how does it affect layout?
The SMA5J17AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W and junction-to-lead resistance (RθJL) of 25 °C/W. These values assume mounting on 5.0 mm × 5.0 mm copper pads per terminal. To maintain safe junction temperatures during repetitive surges, PCB layout must adhere to Vishay's recommended pad dimensions and avoid excessive trace impedance. The SMA5J17AHM3/H does not require heatsinking for single-event protection.
Can the SMA5J17AHM3/H be used in bidirectional configurations?
No, the SMA5J17AHM3/H is a unidirectional TVS diode, as indicated by the "A" suffix (versus "CA" for bidirectional variants like SMA5J17CA). Its cathode band marks the polarity-sensitive terminal, and it conducts only during positive surges relative to ground. For bidirectional protection-such as AC line or data bus applications-engineers must select the CA-suffixed version or pair two unidirectional devices in series opposition.
SMA5J17AHM3/H 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 18.1A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J17AHM3/H FAQ
1.How can I place an order for SMA5J17AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J17AHM3/H 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 SMA5J17AHM3/H reliable?
The price and inventory of SMA5J17AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J17AHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J17AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J17AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J17AHM3/H?
SMA5J17AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J17AHM3/H 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 SMA5J17AHM3/H?
For technical support, including SMA5J17AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J17AHM3/H requirements.
6.How does Aetrix verify that SMA5J17AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J17AHM3/H 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 SMA5J17AHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J17AHM3/H?
All SMA5J17AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J17AHM3/H, 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 SMA5J17AHM3/H part is unused and in its original packaging.
Return procedure for SMA5J17AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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