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Vishay General Semiconductor - Diodes Division SA17CAHE3/54
- Part No.:
- SA17CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA17CAHE3/54.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,552
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Product details
Overview
SA17CAHE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, rated for 17 V standoff voltage (VWM), 19.9–21.5 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), 23.3 A peak pulse current (IPPM), and clamping voltage of 38.9 V at IPPM. It protects signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SA17CAHE3/54 datasheet, SA17CAHE3/54 pinout, SA17CAHE3/54 application, or SA17CAHE3/54 equivalent, this AEC-Q101-qualified TVS offers verified bidirectional clamping, DO-15 mechanical compatibility, low incremental surge resistance, and stable performance across -55 °C to +175 °C junction temperature range.
Technical Context
The SA17CAHE3/54 operates as a symmetrical avalanche diode with identical electrical characteristics in both directions, enabling robust protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at VWM) at 25 °C.
Designed for transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), it delivers 500 W peak pulse power under 10/1000 μs waveform with <1 ns response time and clamps within 38.9 V at 23.3 A - critical for safeguarding 12 V automotive CAN, LIN, and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; matches 12 V system rail with margin for ripple and tolerance. |
| VBR (min/max) | 19.9 V / 21.5 V at 1.0 mA - defines precise avalanche onset window; enables predictable, repeatable clamping behavior. |
| IPPM | 23.3 A (10/1000 μs) - peak surge current capability determines survivability against ISO 7637-2 Pulse 1/2a/3a transients. |
| VC | 38.9 V - clamping voltage at IPPM; must remain below IC absolute maximum ratings (e.g., <40 V for many 3.3 V/5 V interface ICs). |
| PPPM | 500 W - peak pulse power rating confirms suitability for high-energy automotive load-dump surges when combined with series impedance. |
| TJ max. | +175 °C - extended junction temperature rating supports under-hood deployment in engine control modules and body ECUs. |
| Leakage (ID) | <1.0 μA at VWM - negligible standby current avoids signal distortion or battery drain in always-on circuits. |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with matte tin-plated leads; no polarity marking (bidirectional configuration); case meets UL 94 V-0 flammability rating; RoHS compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; either lead may connect to protected line or ground - simplifies PCB layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures long-term VBR stability and low parameter drift over temperature and lifetime - critical for automotive reliability. |
| 500 W peak pulse power (10/1000 μs) | Supports compliance with ISO 7637-2 Pulse 5a (load dump) when used with appropriate series impedance and board layout. |
| AEC-Q101 qualification | Validates robustness for automotive applications including temperature cycling, humidity testing, and mechanical shock per JESD22 standards. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients - improves protection margin for downstream logic-level interface ICs. |
| Fast response time (<1 ns) | Clamps before transient energy couples into sensitive circuitry - essential for protecting high-speed sensor outputs and communication lines. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control units exposed to alternator load dump and relay coil flyback. IC Role / Device Role: Bidirectional clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤38.9 V while maintaining sub-μA leakage - preserves signal integrity and prevents ADC saturation or latch-up. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to inductive switching noise from solenoids and contactors. IC Role / Device Role: Primary transient suppressor mounted at connector entry point before optocoupler input stage. Use Value: Absorbs 500 W surges without degradation, enabling reliable operation in factory environments with frequent EMI events. |
| Automotive CAN Bus Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding CAN_H and CAN_L lines in body control modules from ESD and coupled transients during vehicle assembly or service. IC Role / Device Role: Symmetrical TVS pair (one per line) referenced to chassis ground, leveraging bidirectional conduction. Use Value: Maintains common-mode noise immunity while clamping differential spikes up to ±38.9 V - preserves bit error rate and bus arbitration integrity. | Use Scenario: Suppressing back-EMF from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role: Low-capacitance TVS placed across motor terminals and near MCU driver ICs. Use Value: Withstands repetitive 23.3 A surges at 0.01 % duty cycle - extends controller lifespan and reduces field failure rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CA | Same VWM (17 V), but SMA package (smaller footprint, lower IPPM = 21.7 A, PPPM = 400 W) | Limited to space-constrained consumer electronics; not AEC-Q101 qualified | Select SMAJ17CA only for non-automotive designs where board area is critical and surge severity is lower. |
| 1.5KE18CA | Higher PPPM (1500 W), DO-201 package, same VWM/VBR range, but larger size and higher clamping (40.0 V) | Better for high-energy industrial transients; incompatible with tight automotive PCB layouts | Choose 1.5KE18CA when system-level testing requires >500 W surge handling and package size is not constrained. |
Compared with SMAJ17CA and 1.5KE18CA, SA17CAHE3/54 uniquely balances AEC-Q101 qualification, DO-15 mechanical fit, 500 W capability, and 38.9 V clamping - making it the optimal choice for production automotive electronics requiring validated reliability and standardized form factor.
Availability
SA17CAHE3/54 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and CAN bus transient suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SA17CAHE3/54 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 protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SAxxCA series is engineered specifically for bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where ESD, EFT, and load-dump immunity are mandatory design requirements.
FAQ
What is the clamping voltage of SA17CAHE3/54 at its rated peak pulse current?
The SA17CAHE3/54 has a maximum clamping voltage (VC) of 38.9 V at its rated peak pulse current (IPPM) of 23.3 A under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88378) and defines the upper voltage limit imposed on protected circuitry during surge events. Maintaining VC below downstream IC absolute maximum ratings is essential for reliable SA17CAHE3/54 implementation.
Is SA17CAHE3/54 suitable for automotive applications?
Yes, SA17CAHE3/54 is AEC-Q101 qualified and explicitly designed for automotive use. Its HE3 suffix denotes AEC-Q101 qualification, and its parameters - including 175 °C maximum junction temperature, robust surge handling, and glass-passivated junction - meet requirements for engine control, body electronics, and sensor modules. The SA17CAHE3/54 datasheet confirms qualification per JESD22-A108 and JESD22-A114 standards.
How does the bidirectional nature of SA17CAHE3/54 affect its circuit placement?
The SA17CAHE3/54 has no polarity marking and functions identically in both directions, allowing flexible placement between any two nodes requiring transient protection - such as across differential signal pairs (CAN_H/CAN_L), AC-coupled lines, or ungrounded sensor outputs. This eliminates orientation errors during assembly and simplifies layout versus unidirectional TVS diodes, which require strict cathode/anode alignment relative to ground.
What is the standoff voltage (VWM) of SA17CAHE3/54 and why does it matter?
The SA17CAHE3/54 has a standoff voltage (VWM) of 17 V, meaning it remains non-conductive up to this reverse voltage level during normal operation. This value must exceed the maximum steady-state voltage of the protected line (e.g., 12 V automotive rails with ripple) to prevent leakage or premature clamping. Selecting SA17CAHE3/54 for 12 V systems provides adequate margin while ensuring fast, low-leakage protection during transients.
Does SA17CAHE3/54 have RoHS and lead-free compliance?
Yes, SA17CAHE3/54 is RoHS compliant and lead-free, as indicated by the "HE3" suffix per Vishay's ordering nomenclature. The HE3 variant uses matte tin-plated leads, complies with J-STD-002 and JESD 22-B102 solderability standards, and meets JESD 201 class 2 whisker resistance. Full compliance documentation is available in Vishay's material declaration (www.vishay.com/doc?99912).
SA17CAHE3/54 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:
- -
- 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 ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA17CAHE3/54 FAQ
1.How can I place an order for SA17CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA17CAHE3/54 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 SA17CAHE3/54 reliable?
The price and inventory of SA17CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA17CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA17CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA17CAHE3/54?
SA17CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA17CAHE3/54 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 SA17CAHE3/54?
For technical support, including SA17CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17CAHE3/54 requirements.
6.How does Aetrix verify that SA17CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA17CAHE3/54 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 SA17CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA17CAHE3/54?
All SA17CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA17CAHE3/54, 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 SA17CAHE3/54 part is unused and in its original packaging.
Return procedure for SA17CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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