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Vishay General Semiconductor - Diodes Division SA170AHE3/54
- Part No.:
- SA170AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA170AHE3/54.pdf
- Description:
- TVS DIODE 170VWM 275VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,156
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Product details
Overview
SA170AHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, rated for 170 V stand-off voltage, 209 V breakdown voltage at 1 mA, 500 W peak pulse power (10/1000 μs), 275 V clamping voltage at 1.8 A, and AEC-Q101 qualified for automotive applications. It protects MOSFETs and ICs against inductive switching transients in power supply rails.
For engineers reviewing the SA170AHE3/54 datasheet, SA170AHE3/54 pinout, SA170AHE3/54 application, or SA170AHE3/54 equivalent, this page delivers verified electrical parameters, DO-15 terminal polarity mapping, bidirectional vs. unidirectional distinction, clamping performance under 10/1000 μs surge, and AEC-Q101 qualification status - all critical for automotive-grade overvoltage protection design.
Technical Context
The SA170AHE3/54 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to ESD and lightning-induced surges. Its 170 V stand-off voltage ensures compatibility with 120 V AC-derived DC bus lines and 100 V+ industrial control rails.
Designed for repetitive transient suppression, it sustains 500 W peak pulse power per 10/1000 μs waveform at 0.01% duty cycle and derates linearly above 25 °C ambient, with maximum junction temperature of 175 °C and 70 A non-repetitive forward surge rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected line voltage. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown range defines reliable turn-on threshold under surge conditions. |
| VC @ IPPM | 275 V at 1.8 A - Clamping voltage during full-rated 500 W transient; determines maximum stress on downstream components. |
| PPPM | 500 W - Peak pulse power handling with 10/1000 μs waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IFSM | 70 A - Non-repetitive forward surge current (10 ms half-sine); supports protection of high-current power stages. |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components including temperature cycling and HTRB. |
Pinout & Package
Package: DO-15 (DO-204AC), axial leaded, epoxy-molded case with matte tin-plated leads. Polarity marked by cathode band on one end; cathode is the banded terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (reverse-biased during clamping) | Connected to ground or low-side reference; forms current path during positive transients on cathode side. |
| Cathode (banded end) | Reverse-biased clamping node | Connected to protected line (e.g., 12 V rail); conducts when line voltage exceeds VWM, shunting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable avalanche characteristics and long-term reliability under repeated surge stress without degradation. |
| 500 W peak pulse power (10/1000 μs) | Validates compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment. |
| AEC-Q101 qualification | Confirms suitability for automotive powertrain, body electronics, and ADAS modules requiring extended temperature and life-cycle validation. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive gate drivers and microcontrollers. |
| Solderable per J-STD-002/JESD 22-B102 | Ensures robust lead termination integrity after reflow and wave soldering processes used in high-volume manufacturing. |
Applications
| Automotive Power Supply Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and system ground to clamp positive surges up to ±100 V. Use Value: Limits peak voltage to ≤275 V during 500 W transients, preventing damage to CAN transceivers and MCU power supplies. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection device on 24 V DC sensor inputs exposed to relay coil back-EMF and motor drive noise. Use Value: Responds in <1 ns to suppress 1 kV/μs transients, maintaining signal integrity without adding capacitance to data lines. |
| DC Motor Drive Gate Protection | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding N-channel MOSFET gates in H-bridge motor drivers from inductive kickback. IC Role / Device Role / Timing Role: Clamping diode connected between gate and source to prevent VGS overstress during PWM switching transitions. Use Value: Withstands 70 A forward surge and clamps within 275 V, preserving gate oxide integrity across 100,000+ cycles. | Use Scenario: Front-end protection for Ethernet PHY power rails in outdoor telecom base stations. IC Role / Device Role / Timing Role: Primary surge limiter on +48 V bias line feeding PoE-powered devices. Use Value: Maintains 170 V working voltage while delivering 500 W pulse handling, meeting GR-1089-CORE Level 3 surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170A-E3/52 | Same VWM (170 V), lower PPPM (400 W), SMA package (surface-mount) | Requires PCB layout change; suited for space-constrained designs where through-hole DO-15 is impractical | Select when board area is limited and thermal coupling to copper pour can support 400 W dissipation. |
| 1.5KE170A | Same VWM/VBR ratings, higher IFSM (100 A), DO-201 package (larger body, higher thermal mass) | Higher surge margin but requires larger footprint; better for infrequent, high-energy events like lightning strikes | Choose for legacy designs already using DO-201 or where 100 A surge capability is mandated by system-level testing. |
Compared with SMAJ170A-E3/52 and 1.5KE170A, the SA170AHE3/54 offers AEC-Q101 qualification and DO-15 form factor optimized for automotive production assembly, balancing 500 W surge capacity with proven manufacturability in high-reliability through-hole applications.
Availability
SA170AHE3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O modules, DC motor drive circuits, and telecom line card protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SA170AHE3/54 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SAxxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust transient suppression in harsh environments including automotive, industrial automation, and telecommunications infrastructure.
FAQ
What is the clamping voltage of SA170AHE3/54 at its rated peak pulse current?
The SA170AHE3/54 has a maximum clamping voltage (VC) of 275 V at its peak pulse current (IPPM) of 1.8 A, measured under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated 500 W transient event and is confirmed in the Vishay datasheet Document Number 88378, page 2.
Is SA170AHE3/54 suitable for automotive applications?
Yes, SA170AHE3/54 is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88378, page 3, Note 1). The HE3 suffix denotes AEC-Q101 qualification, and its 175 °C maximum junction temperature, robust surge handling, and tested reliability under temperature cycling make it appropriate for under-hood and chassis-mounted automotive electronics.
What does the 'HE3/54' suffix mean in SA170AHE3/54?
The 'HE3' suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; '54' is the preferred package code denoting 13-inch paper tape and reel packaging with 4000 units per reel. This ordering code aligns with Vishay's standardized nomenclature for automotive-grade DO-15 TVS diodes.
How does SA170AHE3/54 differ from bidirectional variants like SA170CA?
SA170AHE3/54 is unidirectional, featuring a cathode band and conducting only in reverse bias to clamp positive transients; SA170CA is bidirectional with no polarity marking and clamps both polarities symmetrically. Their VBR ranges match (189–209 V), but SA170AHE3/54 supports 70 A forward surge (IFSM), whereas SA170CA does not specify IFSM due to symmetrical structure.
What is the thermal resistance junction-to-lead (RθJL) for SA170AHE3/54?
Vishay does not publish RθJL for SA170AHE3/54 in Document Number 88378. Thermal performance is characterized via the steady-state power derating curve (Fig. 5), showing 3.0 W dissipation at TL = 75 °C on an infinite heatsink. For thermal design, users must rely on the derating curve and empirical board-level measurements rather than a fixed RθJL value.
SA170AHE3/54 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):
- 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)
SA170AHE3/54 FAQ
1.How can I place an order for SA170AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA170AHE3/54 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 SA170AHE3/54 reliable?
The price and inventory of SA170AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA170AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA170AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA170AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA170AHE3/54?
SA170AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA170AHE3/54 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 SA170AHE3/54?
For technical support, including SA170AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA170AHE3/54 requirements.
6.How does Aetrix verify that SA170AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA170AHE3/54 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 SA170AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA170AHE3/54?
All SA170AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA170AHE3/54, 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 SA170AHE3/54 part is unused and in its original packaging.
Return procedure for SA170AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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