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Vishay General Semiconductor - Diodes Division SA17A-E3/54
- Part No.:
- SA17A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA17A-E3/54.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,741
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Product details
Overview
SA17A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for circuit protection against ESD and lightning-induced surges. It features 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR), 27.6 V clamping voltage at 18.1 A peak pulse current, 500 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA17A-E3/54 datasheet, SA17A-E3/54 pinout, SA17A-E3/54 application, or SA17A-E3/54 equivalent, this device is selected for robust overvoltage protection in DC power rails, sensor interfaces, and MOSFET gate drivers where fast response (<1 ns), low clamping ratio, and stable junction temperature up to +175 °C are critical.
Technical Context
The SA17A-E3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transients. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V maximum forward voltage at 100 A surge, supporting high-current transient suppression without latch-up.
It is rated for 70 A non-repetitive forward surge current (IFSM, 10 ms half-sine), 3.0 W steady-state power dissipation on infinite heatsink at TL = 75 °C, and derates linearly above TA = 25 °C per Vishay's Fig. 2 - making it suitable for ambient temperatures up to +125 °C in enclosed industrial enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V systems. |
| VBR min/max | 18.9 V / 20.9 V at 1.0 mA - Tight breakdown tolerance ensures predictable turn-on across production lots. |
| VC @ IPPM | 27.6 V at 18.1 A - Clamping voltage limits downstream IC stress during 10/1000 μs surge events. |
| PPPM | 500 W - Sustains standardized lightning/surge pulses without degradation under 0.01% duty cycle. |
| ID @ VWM | 1.0 μA - Ultra-low leakage preserves battery life in always-on sensor nodes and low-power MCU inputs. |
| TJ max | +175 °C - Enables placement near hot components (e.g., power MOSFETs, inductors) without thermal derating loss. |
| IFSM | 70 A - Withstands high-energy inductive kickback from solenoids or relay coils in automotive body control modules. |
Pinout & Package
Package: DO-15 (DO-204AC), axial leaded, epoxy-molded, RoHS-compliant, matte tin-plated leads solderable per J-STD-002/JESD 22-B102. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential node in unidirectional clamp configuration; carries full surge current during reverse transient. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); avalanche breakdown occurs here when voltage exceeds VBR, shunting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure per JESD22-A101. |
| 500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 Level 3 (1 kV line-to-line, 2 kV line-to-ground) surge immunity requirements. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, infotainment power supplies, and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving system-level EMI resilience. |
| Solder dip 275 °C max. (10 s) | Compatible with standard wave soldering processes without parametric shift or delamination risk. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in body control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy to ground during >100 V spikes lasting <100 ms. Use Value: Prevents damage to LDO regulators and microcontrollers by limiting rail voltage to ≤27.6 V during 18.1 A surge events. | Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD events on factory floor wiring. IC Role / Device Role / Timing Role: Fast-acting voltage clamp placed directly at connector entry point to absorb ±8 kV HBM ESD strikes. Use Value: Maintains signal integrity with <1.0 μA leakage at 17 V, avoiding offset errors in 24-bit ADC front-ends. |
| MOSFET Gate Driver Protection | Telecom DC Feeder Protection |
Use Scenario: Safeguarding high-side N-channel MOSFET gates driven by PWM controllers in motor drives. IC Role / Device Role / Timing Role: Clamps inductive flyback voltage spikes generated during switching transitions to prevent gate oxide rupture. Use Value: Sub-ns response time and 27.6 V VC ensure gate-source voltage stays within ±20 V absolute maximum rating of common logic-level MOSFETs. | Use Scenario: Overvoltage protection on -48 V DC telecom power feeds exposed to lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Bidirectional-capable family member (though SA17A-E3/54 is unidirectional, used in back-to-back configuration for negative rail). Use Value: 500 W PPPM rating supports coordination with upstream fuses and GDTs in multi-stage telecom surge protection architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/5T | Same VWM (17 V), same DO-214AC package, 400 W PPPM (vs. 500 W), higher VC (27.7 V), 17.3 A IPPM. | Limited to lower-energy transients; not AEC-Q101 qualified; suited for commercial-grade consumer power supplies. | Select SMAJ17A-E3/5T only if board space constraints require surface-mount and surge energy is ≤400 W. |
| 1.5KE18A | Same VWM/VBR range, through-hole DO-201AD package, 1500 W PPPM, 200 °C TJ max, no AEC-Q101 qualification. | Higher power handling but larger footprint; intended for industrial AC mains protection, not automotive DC rails. | Choose 1.5KE18A only when protecting 24 V industrial PLC I/O modules requiring >1 kW surge capability. |
Compared with SMAJ17A-E3/5T and 1.5KE18A, the SA17A-E3/54 uniquely balances 500 W surge capacity, AEC-Q101 compliance, DO-15 compactness, and 1.0 μA leakage - making it optimal for space-constrained, automotive-qualified 12 V subsystems where reliability and parametric consistency are mandatory.
Availability
SA17A-E3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power feeders requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for SA17A-E3/54 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 passive components with emphasis on reliability, power efficiency, and automotive qualification.
The SAxxA series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for robust, low-leakage transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 validation and stable parametric performance over temperature.
FAQ
What is the clamping voltage of SA17A-E3/54 at its rated peak pulse current?
The SA17A-E3/54 has a maximum clamping voltage (VC) of 27.6 V at 18.1 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value ensures protected circuits remain below critical voltage thresholds during surge events, and is confirmed in Vishay Document Number 88378, Table on page 2.
Is SA17A-E3/54 suitable for automotive applications?
Yes, SA17A-E3/54 is AEC-Q101 qualified and explicitly listed in Vishay's automotive-grade product documentation. Its construction - glass-passivated junction, 175 °C max junction temperature, and robust surge ratings - meets requirements for engine control, body electronics, and ADAS power domains where reliability under thermal and electrical stress is essential.
What does the "E3/54" suffix mean in SA17A-E3/54?
The "E3" denotes RoHS-compliant, commercial-grade termination meeting JESD 201 Class 1A whisker test; "/54" specifies packaging in 13-inch paper tape and reel with 4000 units per reel. This ordering code aligns with Vishay's standard DO-15 tape-and-reel delivery format for automated SMT placement compatibility.
How does SA17A-E3/54 differ from bidirectional variants like SA17CA?
SA17A-E3/54 is unidirectional with cathode marking and conducts only in forward bias; SA17CA is bidirectional with no polarity marking and clamps in both directions. The SA17A-E3/54 offers lower leakage (1.0 μA vs. up to 2.0 μA for SA17CA) and is preferred for DC rail protection, whereas SA17CA suits AC-coupled or floating signal lines.
Can SA17A-E3/54 be used in parallel for higher surge current handling?
No - paralleling SA17A-E3/54 devices is not recommended due to mismatched VBR tolerances (18.9–20.9 V), which cause uneven current sharing and potential thermal runaway. For higher current needs, select a single higher-rated device such as SA22A-E3/54 or use coordinated multi-stage protection with GDTs and MOVs.
SA17A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA17A-E3/54 FAQ
1.How can I place an order for SA17A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA17A-E3/54 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 SA17A-E3/54 reliable?
The price and inventory of SA17A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA17A-E3/54 is usually 5 days.
3.What payment methods are accepted for SA17A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA17A-E3/54?
SA17A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA17A-E3/54 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 SA17A-E3/54?
For technical support, including SA17A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17A-E3/54 requirements.
6.How does Aetrix verify that SA17A-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA17A-E3/54 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 SA17A-E3/54 meets industry standards.
7.What is the process for return or replacement of SA17A-E3/54?
All SA17A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA17A-E3/54, 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 SA17A-E3/54 part is unused and in its original packaging.
Return procedure for SA17A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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