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Vishay General Semiconductor - Diodes Division SA170CAHE3/54
- Part No.:
- SA170CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA170CAHE3/54.pdf
- Description:
- TVS DIODE 170VWM 275VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,955
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Product details
Overview
SA170CAHE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, rated for 170 V standoff voltage (VWM), 209 V minimum breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), 275 V maximum clamping voltage (VC) at 1.8 A IPPM, and AEC-Q101 qualified for automotive use. It protects sensitive signal lines and power rails against inductive switching transients and ESD in harsh environments.
For engineers reviewing the SA170CAHE3/54 datasheet, SA170CAHE3/54 pinout, SA170CAHE3/54 application, or SA170CAHE3/54 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge, thermal derating curves, and validated alternatives for automotive-grade circuit protection design.
Technical Context
The SA170CAHE3/54 operates as a bidirectional avalanche diode with symmetrical clamping in both polarities, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable VBR over temperature, with a +208 mV/°C temperature coefficient confirmed for the 170 V variant.
Designed for repetitive transient immunity, it sustains 500 W peak pulse power per 10/1000 μs waveform at ≤0.01% duty cycle and derates linearly above 25 °C ambient, maintaining 3.0 W steady-state dissipation at TL = 75 °C on an infinite heatsink. It exhibits low incremental surge resistance and sub-nanosecond response time to fast-rising transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min) | 189 V - Minimum breakdown voltage at 1 mA test current; defines lower limit of clamping onset |
| VC @ IPPM | 275 V - Clamped voltage at 1.8 A peak pulse current; determines protected circuit's max transient exposure |
| PPPM | 500 W - Peak surge power handling capability with 10/1000 μs waveform; validates robustness vs. ISO 7637-2 Pulse 1/2a/5a |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive deployment |
| AEC-Q101 | Qualified - Certified for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
| Package | DO-15 (DO-204AC) - Industry-standard axial-leaded package with 0.258" body length, RoHS-compliant matte tin leads |
Pinout & Package
DO-15 (DO-204AC) package: axial-leaded, molded epoxy case, 0.258" (6.55 mm) maximum body length, 0.138" (3.5 mm) maximum diameter, matte tin-plated leads solderable per J-STD-002/JESD 22-B102. Bidirectional construction means no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts bidirectionally when voltage exceeds ±VBR |
| Leads (anode & cathode) | PCB interface and thermal path | Matte tin-plated copper leads provide mechanical anchoring and conduct heat to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5%) and long-term reliability under thermal cycling and humidity |
| 500 W peak pulse rating (10/1000 μs) | Validates immunity to high-energy load dump and inductive kick events in 12 V/24 V automotive systems |
| AEC-Q101 qualification | Confirms suitability for automotive powertrain, body control, and ADAS modules requiring zero-defect reliability |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream ICs like CAN transceivers or microcontrollers during surge events |
| UL 94 V-0 molding compound | Provides flame-retardant enclosure essential for enclosed automotive junction boxes and ECUs |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients up to 120 V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary clamping device placed at board entry point, shunting surge energy to ground before reaching DC-DC converters and MCU power rails. Use Value: Limits peak rail voltage to ≤275 V during 1.8 A surge, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair (e.g., RS-485, CAN bus) to clamp common-mode transients. Use Value: Maintains signal integrity by clamping ±275 V surges within <1 ns, avoiding false triggering or ADC saturation in 16-bit precision front-ends. |
| Telecom Line Surge Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against lightning-induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on line-side of isolation transformer, absorbing residual energy after primary gas discharge tube. Use Value: Provides precise clamping at 275 V to protect 100BASE-TX magnetics and PHY ICs rated for 36 V abs max, ensuring IEEE 802.3 compliance. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across motor terminals to clamp inductive kickback during MOSFET turn-off in half-bridge drivers. Use Value: Absorbs 500 W pulses without degradation, extending MOSFET lifetime and eliminating need for snubber RC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170AHE3/A | Unidirectional; same VWM (170 V), VC = 275 V, but lacks bidirectional symmetry and AEC-Q101 certification | Requires external polarity management; unsuitable for AC-coupled or floating signal lines | Select only if circuit topology enforces fixed polarity and automotive qualification is not required |
| SMCJ170CA | Same bidirectional function and VWM, but SMC (DO-214AB) package; higher IPPM (2.1 A), same VC (275 V) | Larger footprint; better thermal performance but incompatible with DO-15 PCB layouts | Choose when higher surge current margin is needed and board space allows SMC package rework |
Compared with SMAJ170AHE3/A and SMCJ170CA, the SA170CAHE3/54 uniquely combines bidirectional operation, AEC-Q101 qualification, and DO-15 compatibility-making it the only drop-in solution for legacy automotive harness interfaces requiring axial leaded, polarity-agnostic TVS protection.
Availability
SA170CAHE3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor node development, and telecom infrastructure projects requiring stable component supply and full traceability.
Supply support for SA170CAHE3/54 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, power efficiency, and automotive-grade validation.
The SAxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust transient suppression in automotive, industrial, and telecom systems where failure modes must be eliminated under extreme electrical stress.
FAQ
What is the clamping voltage of SA170CAHE3/54 at its rated peak pulse current?
The SA170CAHE3/54 has a maximum clamping voltage (VC) of 275 V at its specified peak pulse current (IPPM) of 1.8 A, measured using the standard 10/1000 μs waveform. This value is critical for determining whether downstream components remain within their absolute maximum voltage ratings during surge events. The SA170CAHE3/54 maintains this clamping performance across its full operating temperature range.
Is SA170CAHE3/54 suitable for automotive applications?
Yes, SA170CAHE3/54 is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and ADAS modules. Its DO-15 package, 175 °C maximum junction temperature, and robust surge handling meet stringent automotive environmental and reliability requirements. The HE3 suffix confirms AEC-Q101 qualification per Vishay's ordering nomenclature.
How does the bidirectional nature of SA170CAHE3/54 affect its circuit placement?
The bidirectional architecture of SA170CAHE3/54 eliminates polarity concerns during placement-it functions identically regardless of orientation across protected lines. This simplifies layout for AC-coupled interfaces like CAN, RS-485, or transformer-isolated power, and avoids misassembly risk in high-volume manufacturing. No color band or marking is present, consistent with bidirectional TVS convention.
What is the standoff voltage rating of SA170CAHE3/54, and how does it relate to system operating voltage?
The SA170CAHE3/54 has a standoff voltage (VWM) of 170 V, meaning it remains non-conductive below this DC or RMS voltage level. For a 24 V automotive system, this provides ample margin above nominal rail voltage and typical load dump peaks (~120 V), ensuring no leakage or power loss during normal operation while remaining ready to clamp transients exceeding 189 V (VBR min).
Does SA170CAHE3/54 require a heatsink for continuous power dissipation?
No, SA170CAHE3/54 is rated for 3.0 W steady-state power dissipation only when mounted on an infinite heatsink at TL = 75 °C-this is a derated thermal reference, not a recommendation for active cooling. In typical PCB applications with 1–2 oz copper pours, its 500 W pulse rating dominates design considerations; continuous dissipation remains negligible due to its transient-only operation mode.
SA170CAHE3/54 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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 1.8A
- 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)
SA170CAHE3/54 FAQ
1.How can I place an order for SA170CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA170CAHE3/54 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 SA170CAHE3/54 reliable?
The price and inventory of SA170CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA170CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA170CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA170CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA170CAHE3/54?
SA170CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA170CAHE3/54 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 SA170CAHE3/54?
For technical support, including SA170CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA170CAHE3/54 requirements.
6.How does Aetrix verify that SA170CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA170CAHE3/54 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 SA170CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA170CAHE3/54?
All SA170CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA170CAHE3/54, 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 SA170CAHE3/54 part is unused and in its original packaging.
Return procedure for SA170CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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