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Vishay General Semiconductor - Diodes Division SMA5J17CAHE3/5A
- Part No.:
- SMA5J17CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J17CAHE3/5A.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,622
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Product details
Overview
SMA5J17CAHE3/5A 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 standoff voltage (VWM), 18.9–20.9 V breakdown range (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 SMA5J17CAHE3/5A datasheet, SMA5J17CAHE3/5A pinout, SMA5J17CAHE3/5A application, or SMA5J17CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 500 W surge rating, low thermal resistance (RθJL = 25 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device functions as a voltage-clamped crowbar during transients, responding in sub-nanosecond time with low incremental surge resistance to limit overvoltage across protected circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and robust ESD immunity up to ±30 kV (HBM).
Designed for unclamped inductive switching events (e.g., relay coil flyback, motor commutation), it delivers symmetrical clamping in both directions due to its bidirectional construction, with no polarity marking required. Thermal performance is validated per JESD22-A104 and derated linearly above 25 °C using the published curve in Figure 2.
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 - guaranteed breakdown threshold at 1 mA test current, defining turn-on precision |
| VC @ IPPM | 27.6 V at 18.1 A - clamped voltage during 500 W surge, directly limiting stress on downstream ICs |
| PPPM | 500 W - peak pulse power handling per 10/1000 µs waveform, enabling protection against IEC 61000-4-5 Level 4 surges |
| TJ max | +150 °C - maximum junction temperature, supporting under-hood automotive use without derating |
| RθJL | 25 °C/W - low junction-to-lead thermal resistance, critical for sustained surge dissipation in compact layouts |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for positive or negative surges relative to cathode |
| Cathode | Transient return path (bidirectional) | Functions identically to anode; terminals are electrically interchangeable in bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 |
| Glass-passivated junction | Ensures stable VBR tolerance and <1.0 µA leakage at VWM, critical for low-power sensor biasing |
| MSL Level 1 (260 °C) | Enables standard reflow assembly without moisture sensitivity concerns or baking requirements |
| Low Rsurge | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving system immunity |
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 inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing energy without affecting DC bias or signal integrity. Use Value: Enables compliance with ISO 16750-2 (load dump) and ISO 7637-2 (transient pulses) while maintaining <1.0 µA leakage at 17 V standby. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to 24 V DC field wiring surges from relay contact bounce or solenoid de-energization. IC Role / Device Role / Timing Role: Fast-response shunt protector across input terminals, clamping transients before they reach optocoupler or MCU GPIO pins. Use Value: Delivers 500 W surge handling with 27.6 V clamping to prevent false triggering or latch-up in 24 V-rated inputs. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base stations and network equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS on differential pairs, placed before common-mode chokes to absorb common-mode energy. Use Value: Symmetrical bidirectional clamping ensures equal protection on both A/B lines without polarity dependency or layout asymmetry. | Use Scenario: Protecting microcontroller reset lines and gate drivers in washing machine or HVAC motor inverters subjected to back-EMF spikes during PWM switching. IC Role / Device Role / Timing Role: Localized clamp adjacent to sensitive control ICs, minimizing trace inductance to reduce overshoot during 100 ns–1 µs transients. Use Value: RθJL = 25 °C/W enables rapid heat transfer to PCB copper, sustaining repeated 500 W pulses without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J17CA-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free material compliance is mandated | Choose SMA5J17CAHE3/5A for standard RoHS; select SMA5J17CA-M3/5A only when halogen-free certification is contractually required |
| SMCJ17CAHE3/5A | Same VWM/VC but higher PPPM = 1500 W in larger SMC (DO-214AB) package; RθJL = 15 °C/W | Used where higher single-pulse energy (e.g., IEC 61000-4-5 2 Ω coupling) or improved thermal margin is needed | Select SMA5J17CAHE3/5A for space-constrained designs requiring 500 W; choose SMCJ17CAHE3/5A only if board area allows larger footprint and >500 W rating is mandatory |
Compared with SMA5J17CA-M3/5A, the SMA5J17CAHE3/5A offers identical surge performance with standard RoHS compliance; versus SMCJ17CAHE3/5A, it trades 1000 W headroom and lower thermal resistance for 40 % smaller PCB area - making it optimal for dense automotive modules where volume and weight are constrained.
Availability
SMA5J17CAHE3/5A is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom line interface applications requiring stable component supply, AEC-Q101 qualification, and consistent 500 W surge capability.
Supply support for SMA5J17CAHE3/5A 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, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained environments, targeting automotive, industrial, and telecom systems where AEC-Q101 compliance and 500 W surge handling in SMA package are essential.
FAQ
What is the clamping voltage of the SMA5J17CAHE3/5A at its rated peak pulse current?
The SMA5J17CAHE3/5A clamps to a maximum of 27.6 V at its peak pulse current of 18.1 A, measured under the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J17CAHE3/5A achieves this with low incremental surge resistance, ensuring predictable voltage limiting without oscillation or thermal runaway.
Is the SMA5J17CAHE3/5A suitable for automotive applications?
Yes, the SMA5J17CAHE3/5A is AEC-Q101 qualified and explicitly intended for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction meets MSL Level 1, operates from –55 °C to +150 °C, and passes vibration, thermal cycling, and humidity testing per JESD22. The SMA5J17CAHE3/5A is marked with HE3 suffix to denote this qualification, distinguishing it from commercial-grade variants.
How does the bidirectional configuration of the SMA5J17CAHE3/5A affect PCB layout?
The SMA5J17CAHE3/5A has no polarity marking and functions identically in either orientation, eliminating orientation constraints during automated placement. This simplifies layout by removing the need for silkscreen polarity indicators or directional routing - especially valuable in differential signal protection like RS-485 or CAN. The SMA5J17CAHE3/5A's symmetric terminal structure ensures matched clamping behavior regardless of mounting direction.
What is the maximum leakage current of the SMA5J17CAHE3/5A at its standoff voltage?
The SMA5J17CAHE3/5A exhibits a maximum reverse leakage current of 1.0 µA at its 17 V standoff voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves battery life in always-on automotive modules and avoids loading of high-impedance sensor outputs. Leakage remains below 5 µA up to +125 °C, verified per the manufacturer's electrical characteristics table.
Can the SMA5J17CAHE3/5A be used in place of a unidirectional TVS like SMA5J17AHE3/5A?
No - the SMA5J17CAHE3/5A is strictly bidirectional and cannot replace unidirectional types in circuits requiring DC blocking or forward conduction paths. Unidirectional devices like SMA5J17AHE3/5A conduct in one direction only and feature a cathode band; substituting the SMA5J17CAHE3/5A would allow unintended conduction during normal operation. Always match polarity type to circuit topology: use SMA5J17CAHE3/5A only where symmetrical AC or dual-polarity transient suppression is required.
SMA5J17CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J17CAHE3/5A FAQ
1.How can I place an order for SMA5J17CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J17CAHE3/5A 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 SMA5J17CAHE3/5A reliable?
The price and inventory of SMA5J17CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J17CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J17CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J17CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J17CAHE3/5A?
SMA5J17CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J17CAHE3/5A 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 SMA5J17CAHE3/5A?
For technical support, including SMA5J17CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J17CAHE3/5A requirements.
6.How does Aetrix verify that SMA5J17CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J17CAHE3/5A 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 SMA5J17CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J17CAHE3/5A?
All SMA5J17CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J17CAHE3/5A, 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 SMA5J17CAHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J17CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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