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Vishay General Semiconductor - Diodes Division SMA5J17CAHM3/H
- Part No.:
- SMA5J17CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J17CAHM3/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,315
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Product details
Overview
SMA5J17CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 µs), clamping voltage of 27.6 V at 18.1 A, and operates from −55 °C to +150 °C - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J17CAHM3/H datasheet, SMA5J17CAHM3/H pinout, SMA5J17CAHM3/H application, or SMA5J17CAHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, bidirectional clamping behavior, thermal resistance (RθJA = 80 °C/W), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its symmetrical clamping characteristic ensures identical VC and VBR in both polarities, with no polarity marking required on the SMA package.
Rated for 500 W peak pulse power under 10/1000 µs waveform and derated above 25 °C per Fig. 2, it supports robust protection in automotive-grade systems where IEC 61000-4-5 Level 4 compliance is required - validated by AEC-Q101 qualification and MSL Level 1 moisture sensitivity rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line. |
| VBR min/max | 18.9 V / 20.9 V at 1 mA - guaranteed breakdown threshold ensuring predictable turn-on during transients. |
| VC @ IPPM | 27.6 V at 18.1 A - clamped voltage during 500 W surge; determines maximum stress on downstream ICs. |
| PPPM | 500 W - peak pulse power handling capability under standardized 10/1000 µs waveform; enables IEC 61000-4-5 compliance. |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments. |
| RθJA | 80 °C/W - thermal resistance junction-to-ambient on standard 5 mm × 5 mm copper pads; informs PCB thermal design. |
| Package | SMA (DO-214AC) - surface-mount, low-profile package compatible with automated placement and reflow soldering. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional conduction path | No designated anode or cathode; terminals are interchangeable - enables single-component protection on AC or floating lines. |
| Case | Non-electrical mechanical interface | Plastic body provides insulation and mechanical mounting; no thermal or electrical connection to die. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets environmental requirements for modern automotive and industrial manufacturing without compromising reliability. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow assembly without pre-baking or special handling. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive 3.3 V or 5 V logic. |
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity stress. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under ±27.6 V clamping while surviving repeated 500 W surges - critical for AEC-Q100 Grade 2 system compliance. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Transient suppression device across 24 V DC input lines to prevent false triggering and latch-up in microcontroller GPIOs. Use Value: Enables reliable operation in harsh factory environments with >100,000 surge cycles at rated conditions due to low Rsurge and stable VBR. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Secondary-side overvoltage protection on Ethernet PHY power rails and auxiliary bias supplies in PoE-powered equipment. IC Role / Device Role / Timing Role: Fast-response clamp limiting transient excursions to <27.6 V during lightning-induced surges on isolated DC outputs. Use Value: Complements primary-side MOVs with precise clamping and faster response, reducing risk of secondary-side IC damage. |
Use Scenario: Input-stage surge protection for USB-C PD adapters and wireless charging base stations subjected to user-handling ESD events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bidirectional TVS placed between VBUS and GND to absorb HBM ±15 kV discharges. Use Value: Prevents latch-up in buck controller ICs without degrading 100+ kHz switching performance due to minimal parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J17CAHE3/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Preferred for commercial-grade automotive modules where halogen content is unrestricted. | Select SMA5J17CAHE3/H when halogen-free requirement is not mandated by OEM specification. |
| SMA6J17CAHM3/H | 600 W peak pulse power (vs. 500 W); otherwise identical VWM, VBR, VC, and package. | Suitable for higher-energy threat environments such as 12 V battery rail protection in start-stop systems. | Choose SMA6J17CAHM3/H when system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires >500 W margin. |
Compared with SMA5J17CAHM3/H, SMA5J17CAHE3/H offers identical protection performance without halogen-free compliance, while SMA6J17CAHM3/H extends surge capability by 20 % - enabling design flexibility across cost-sensitive, regulatory-driven, and high-threat application tiers.
Availability
SMA5J17CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power rails, and consumer power adapter designs requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for SMA5J17CAHM3/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 and automotive-grade validation.
The SMA5JxxCA family is engineered for high-power-density transient suppression in space-constrained, high-reliability applications - particularly targeting automotive electronics, industrial controls, and telecom infrastructure where bidirectional clamping and AEC-Q101 compliance are mandatory.
FAQ
What does the "HM3" suffix indicate in SMA5J17CAHM3/H?
The "HM3" suffix in SMA5J17CAHM3/H denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker test requirements. It confirms compliance with automotive environmental standards while maintaining identical electrical performance and AEC-Q101 qualification as the HE3 variant. SMA5J17CAHM3/H is fully compatible with lead-free reflow processes up to 260 °C peak temperature.
Is SMA5J17CAHM3/H suitable for protecting 12 V automotive power rails?
Yes, SMA5J17CAHM3/H is rated for 17 V stand-off voltage and clamps at 27.6 V - making it appropriate for 12 V nominal systems where load dump transients reach up to 25 V. Its AEC-Q101 qualification, −55 °C to +150 °C operating range, and 500 W surge capability align with ISO 7637-2 and IEC 61000-4-5 requirements for automotive power rail protection. SMA5J17CAHM3/H has been validated in engine control unit power domains.
How does SMA5J17CAHM3/H differ from unidirectional variants like SMA5J17A?
SMA5J17CAHM3/H is bidirectional with symmetrical clamping in both polarities and no polarity marking, whereas SMA5J17A is unidirectional with a cathode band and only conducts in reverse bias. SMA5J17CAHM3/H supports AC-coupled or floating signal lines (e.g., CAN differential pairs), while SMA5J17A is limited to DC-biased lines. Both share identical VWM, VBR, and PPPM, but SMA5J17A supports 40 A IFSM - irrelevant for SMA5J17CAHM3/H due to its bidirectional nature.
What is the thermal resistance of SMA5J17CAHM3/H, and how does it affect PCB layout?
SMA5J17CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's DO-214AC footprint. To maintain safe junction temperatures under repeated surges, designers must allocate adequate copper area and avoid excessive trace length - especially critical in automotive under-hood applications where ambient temperatures exceed 85 °C.
Does SMA5J17CAHM3/H meet IEC 61000-4-5 surge immunity requirements?
SMA5J17CAHM3/H supports IEC 61000-4-5 compliance when implemented with proper PCB layout and system-level coordination - its 500 W peak pulse power rating (10/1000 µs) corresponds to Level 4 (4 kV line-earth, 2 kV line-line) testing when combined with series impedance. While the device itself is not certified to IEC 61000-4-5, its clamping performance, fast response, and AEC-Q101 qualification make SMA5J17CAHM3/H a proven solution in certified automotive and industrial systems meeting that standard.
SMA5J17CAHM3/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:
- -
- Bidirectional Channels:
- 1
- 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)
SMA5J17CAHM3/H FAQ
1.How can I place an order for SMA5J17CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J17CAHM3/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 SMA5J17CAHM3/H reliable?
The price and inventory of SMA5J17CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J17CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J17CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J17CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J17CAHM3/H?
SMA5J17CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J17CAHM3/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 SMA5J17CAHM3/H?
For technical support, including SMA5J17CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J17CAHM3/H requirements.
6.How does Aetrix verify that SMA5J17CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J17CAHM3/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 SMA5J17CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J17CAHM3/H?
All SMA5J17CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J17CAHM3/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 SMA5J17CAHM3/H part is unused and in its original packaging.
Return procedure for SMA5J17CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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