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Vishay General Semiconductor - Diodes Division SMA5J17AHM3/I
- Part No.:
- SMA5J17AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J17AHM3/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,804
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Product details
Overview
SMA5J17AHM3/I from Vishay General Semiconductor is a unidirectional 500 W Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, featuring 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR), and 27.6 V clamping voltage (VC) at 18.1 A peak pulse current. It protects MOSFETs and ICs against inductive switching transients in automotive power supplies.
For engineers reviewing the SMA5J17AHM3/I datasheet, SMA5J17AHM3/I pinout, SMA5J17AHM3/I application, or SMA5J17AHM3/I equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), polarity marking, and halogen-free RoHS compliance per ordering code HM3.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass-passivated junction and low incremental surge resistance, enabling fast response to 10/1000 μs transients. Its 150 °C maximum junction temperature and MSL Level 1 rating support reflow soldering at 260 °C peak.
The SMA5J17AHM3/I is rated for 40 A non-repetitive forward surge current (IFSM) and exhibits 800 μA max reverse leakage at VWM, meeting ANSI/IEEE C62.35 standards for transient suppression. Polarity is marked by cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 18.9 V / 20.9 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 27.6 V - Clamped voltage seen by protected circuit during 18.1 A 10/1000 μs surge |
| PPPM | 500 W - Peak pulse power handling capability under standardized transient waveform |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance determines derating above 25 °C ambient |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms), critical for inductive load switch-off protection |
| TJ max | +150 °C - Maximum allowable junction temperature, enabling operation in under-hood automotive environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line; band-marked end sinks surge current into ground path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant (HM3) | Meets JESD201 Class 2 whisker resistance and environmental compliance for Tier 1 supply chains |
| Low Rsurge | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V/5 V logic rails |
| MSL Level 1 | Supports standard SMT reflow without moisture sensitivity concerns (peak 260 °C) |
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Suppresses load-dump and inductive kickback transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges below MOSFET VDSS rating. Use Value: Withstands 500 W pulses and 40 A surge, protecting high-side switches without derating at 125 °C ambient. |
Use Scenario: Shields gate drivers and microcontrollers from flyback voltage spikes generated by relay or solenoid coils. IC Role / Device Role / Timing Role: Fast-clamping diode across coil terminals or on driver output lines to limit voltage rise rate. Use Value: 27.6 V clamping at 18.1 A ensures safe operation of 24 V-rated logic and gate drivers in factory automation PLCs. |
| Telecom DC Power Input | Consumer Appliance Power Stage |
Use Scenario: Guards PoE-powered equipment inputs against lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary-level TVS on input filter stage, coordinated with upstream GDT or MOV for staged protection. Use Value: 17 V VWM allows compatibility with 48 V nominal systems using 2:1 voltage divider monitoring, while 500 W rating handles telecom surge standards. |
Use Scenario: Protects BLDC motor controller FETs and Hall sensors from commutation spikes in washing machines and HVAC fans. IC Role / Device Role / Timing Role: Localized clamping device mounted adjacent to power stage, minimizing loop inductance. Use Value: SMA package enables automated placement near high-current traces; 80 °C/W RθJA supports thermal design in compact enclosures. |
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/I | RoHS-compliant but not halogen-free; lacks JESD201 Class 2 whisker resistance | Approved for commercial-grade automotive modules where halogen-free is not mandated | Select when cost-sensitive designs require AEC-Q101 qualification without halogen-free requirement |
| SMCJ17A | Higher 1500 W PPPM, larger SMC (DO-214AB) package, same VWM/VC ratings | Better suited for higher-energy transients; requires larger PCB footprint and different pad layout | Choose for industrial systems needing >500 W surge margin where space permits SMC package |
Compared with SMA5J17AHM3/I, SMA5J17AHE3/I offers identical electrical performance and AEC-Q101 qualification but omits halogen-free compliance, while SMCJ17A provides triple the pulse power in a physically larger package-requiring layout revision but delivering extended surge endurance.
Availability
SMA5J17AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, and telecom power input circuits requiring stable component supply with AEC-Q101 validation and halogen-free compliance.
Supply support for SMA5J17AHM3/I 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, and protection devices with emphasis on reliability and automotive qualification.
The SMA5J series is designed for high-power-density transient suppression in space-constrained, thermally demanding applications-including engine control units, ADAS power domains, and industrial power conversion stages.
FAQ
What does the "HM3" suffix mean in SMA5J17AHM3/I?
The "HM3" suffix in SMA5J17AHM3/I indicates halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, and AEC-Q101 qualification. It also specifies tape-and-reel packaging (7" or 13" reel depending on suffix /I or /H) and is distinct from E3 (RoHS only) or HE3 (AEC-Q101, non-halogen-free) variants. SMA5J17AHM3/I meets automotive supply chain material requirements.
Is SMA5J17AHM3/I bidirectional or unidirectional?
SMA5J17AHM3/I is a unidirectional TVS diode, as confirmed by its "A" suffix (vs. "CA" for bidirectional) and explicit polarity marking: a cathode band denotes the cathode terminal. Its electrical characteristics-including forward voltage drop and IFSM rating-are defined only for forward conduction, and it must be oriented with cathode toward the protected line.
What is the clamping voltage of SMA5J17AHM3/I and how is it measured?
The clamping voltage of SMA5J17AHM3/I is 27.6 V, measured at 18.1 A peak pulse current (IPPM) under a 10/1000 μs waveform per IEC 61000-4-5. This value represents the maximum voltage imposed on the protected circuit during surge conditions and is specified in the Vishay datasheet Document Number 88875, Table "ELECTRICAL CHARACTERISTICS" for SMA5J17A.
Does SMA5J17AHM3/I require derating at elevated temperatures?
Yes, SMA5J17AHM3/I requires derating above 25 °C ambient temperature. Its peak pulse power (PPPM) decreases linearly per Figure 2 in the datasheet, with full 500 W rated only at TA ≤ 25 °C. At 125 °C, PPPM drops to approximately 250 W. Derating is based on RθJA = 80 °C/W and must be applied in thermal design for automotive or industrial use cases.
Can SMA5J17AHM3/I replace SMA5J17A-E3 in an existing design?
SMA5J17AHM3/I can replace SMA5J17A-E3 electrically and mechanically-same SMA package, pinout, and VWM/VC specs-but adds halogen-free construction, AEC-Q101 qualification, and JESD201 Class 2 whisker resistance. No PCB changes are needed, though procurement and compliance documentation must reflect HM3-specific certifications required for automotive Tier 1 programs.
SMA5J17AHM3/I 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/I FAQ
1.How can I place an order for SMA5J17AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J17AHM3/I 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/I reliable?
The price and inventory of SMA5J17AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J17AHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J17AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J17AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J17AHM3/I?
SMA5J17AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J17AHM3/I 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/I?
For technical support, including SMA5J17AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J17AHM3/I requirements.
6.How does Aetrix verify that SMA5J17AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J17AHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of SMA5J17AHM3/I?
All SMA5J17AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J17AHM3/I, 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/I part is unused and in its original packaging.
Return procedure for SMA5J17AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J17AHM3/I Tags
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