My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SA170CHE3/73
- Part No.:
- SA170CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA170CHE3/73.pdf
- Description:
- TVS DIODE 170VWM 304VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,273
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA170CHE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 170 V stand-off voltage (VWM), 209 V minimum breakdown voltage (VBR), and 500 W peak pulse power (10/1000 μs). It provides robust clamping for automotive and industrial electronics against inductive switching transients and ESD events.
For engineers reviewing the SA170CHE3/73 datasheet, SA170CHE3/73 pinout, SA170CHE3/73 application, or SA170CHE3/73 equivalent, this AEC-Q101 qualified TVS offers verified bi-directional clamping performance, low incremental surge resistance, and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering - critical for high-reliability power rail and signal line protection.
Technical Context
The SA170CHE3/73 operates as a bi-directional avalanche diode with symmetrical clamping in both polarities, enabling transient suppression on AC-coupled or floating lines without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at 170 V).
Designed for repetitive surge handling under 0.01 % duty cycle, it delivers 275 A peak pulse current (IPPM) with a maximum clamping voltage of 208 V at that current, maintaining <1 ns response time and thermal stability up to TJ = 175 °C.
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 1.0 mA test current; defines reliable conduction onset |
| VC @ IPPM | 208 V - Clamped voltage at 275 A peak pulse; determines protected circuit's maximum overvoltage stress |
| PPPM | 500 W - Peak pulse power handling per 10/1000 μs waveform; sets surge energy absorption capability |
| IPPM | 275 A - Peak pulse current capacity; defines survivability against high-energy transients like ISO 7637-2 Pulse 5a |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| Leakage @ VWM | <1.0 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
Pinout & Package
Package: DO-204AC (DO-15), molded epoxy case meeting UL 94 V-0 flammability rating; bi-directional configuration with no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction terminals | No functional distinction - either lead serves as input/output for transient suppression in AC or floating systems |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring extended temperature and reliability compliance |
| Glass passivated chip junction | Ensures stable electrical parameters over lifetime and resistance to humidity-induced degradation |
| 500 W peak pulse power (10/1000 μs) | Supports protection against severe load dump and inductive kick events per ISO 16750-2 and SAE J1113-11 |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD ±15 kV contact discharge) |
| Matte tin plated leads | Guarantees solderability per J-STD-002 and JESD 22-B102; HE3 suffix meets JESD 201 Class 2 whisker resistance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump transients (ISO 16750-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Bi-directional clamping device placed across power input rails to shunt surge energy to ground before downstream regulators or MCUs are stressed. Use Value: Limits rail voltage to ≤208 V during 275 A surges, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies and CAN transceivers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to microcontrollers in factory automation PLCs. IC Role / Device Role / Timing Role: Signal-line TVS mounted at connector entry point to absorb ESD (IEC 61000-4-2) and cable discharge events before reaching ADC inputs. Use Value: Clamps transients to ≤208 V with sub-nanosecond response, preserving 12-bit+ measurement accuracy and avoiding false triggers in high-impedance sensor paths. |
| Telecom Line Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding RS-485/RS-232 data lines in base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bi-directional TVS placed differential-mode across twisted-pair lines to suppress common-mode and differential-mode transients simultaneously. Use Value: Maintains signal integrity by limiting differential overvoltage to ≤208 V while exhibiting <1 pF inter-electrode capacitance - critical for >1 Mbps data rates. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp flyback voltage spikes generated during PWM commutation or sudden shutdown. Use Value: Absorbs 500 W pulses without degradation, extending MOSFET lifespan and eliminating need for snubber RC networks in cost-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170CA | Same VWM (170 V), lower PPPM (400 W), SMA package (smaller footprint, lower thermal mass) | Preferred for space-constrained PCBs where 400 W surge margin suffices; not AEC-Q101 qualified | Select SMAJ170CA only if board area is critical and automotive qualification is unnecessary |
| 1.5KE170CA | Same VWM (170 V), higher PPPM (1500 W), DO-201AD package (larger, higher thermal inertia) | Suitable for high-energy industrial surge environments (e.g., motor drives); requires larger pad layout and higher mounting torque | Choose 1.5KE170CA when system-level surge testing exceeds IEC 61000-4-5 Level 4 (4 kV) |
Compared with SMAJ170CA and 1.5KE170CA, SA170CHE3/73 uniquely balances 500 W surge capability, AEC-Q101 qualification, and DO-15 manufacturability - making it optimal for automotive-grade production where reliability, supply continuity, and through-hole assembly compatibility are prioritized.
Availability
SA170CHE3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom infrastructure, and consumer appliance motor drive circuits requiring stable component supply and long-term lifecycle support.
Supply support for SA170CHE3/73 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 validation.
The SAxxxC series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive power distribution, industrial control, and communications infrastructure.
FAQ
What is the clamping voltage of SA170CHE3/73 at its rated peak pulse current?
The SA170CHE3/73 has a maximum clamping voltage (VC) of 208 V when subjected to its rated peak pulse current of 275 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 worst-case surge events. The SA170CHE3/73 maintains this clamping performance consistently across its qualified operating temperature range.
Is SA170CHE3/73 suitable for automotive applications?
Yes, SA170CHE3/73 is AEC-Q101 qualified and explicitly designed for automotive use, including engine control modules, body electronics, and infotainment power supplies. Its 175 °C maximum junction temperature, glass-passivated junction, and robust surge ratings meet ISO 16750-2 load dump requirements. The HE3 suffix confirms compliance with JESD 201 Class 2 whisker resistance - a mandatory requirement for under-hood automotive components. SA170CHE3/73 is validated for these conditions per Vishay's qualification report.
How does the bi-directional configuration of SA170CHE3/73 affect its circuit placement?
The bi-directional nature of SA170CHE3/73 means it functions identically regardless of voltage polarity - eliminating the need for orientation during placement and enabling use on AC-coupled lines, floating grounds, or differential signal pairs. Unlike uni-directional TVS diodes, SA170CHE3/73 has no cathode marking and must be installed without regard to lead direction. This simplifies layout and reduces assembly errors in systems such as RS-485 buses or transformer-isolated power rails where polarity reversal may occur.
What is the maximum reverse leakage current for SA170CHE3/73 at its stand-off voltage?
At its rated stand-off voltage of 170 V and ambient temperature of 25 °C, SA170CHE3/73 exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage ensures minimal impact on high-impedance sensor circuits and battery-powered systems where standby current budget is critical. Leakage remains within specification up to 125 °C per Vishay's derating curves, confirming suitability for thermally demanding applications. SA170CHE3/73 achieves this performance via precision-controlled avalanche junction processing.
Does SA170CHE3/73 require heatsinking for continuous power dissipation?
No, SA170CHE3/73 is not intended for continuous power dissipation; its 3.0 W steady-state rating (PD) applies only with infinite heatsink at TL = 75 °C and is not relevant for typical TVS operation. The device is designed for transient suppression - conducting only during short-duration surges (≤1000 μs). Its thermal design relies on junction-to-lead conduction, and standard DO-15 PCB pad layouts provide sufficient thermal relief. Continuous DC power dissipation would exceed safe operating limits and cause failure; SA170CHE3/73 must be used strictly as a clamping device, not a voltage regulator.
SA170CHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 304V
- Current - Peak Pulse (10/1000µs):
- 1.6A
- 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)
SA170CHE3/73 FAQ
1.How can I place an order for SA170CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA170CHE3/73 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 SA170CHE3/73 reliable?
The price and inventory of SA170CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA170CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA170CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA170CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA170CHE3/73?
SA170CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA170CHE3/73 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 SA170CHE3/73?
For technical support, including SA170CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA170CHE3/73 requirements.
6.How does Aetrix verify that SA170CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA170CHE3/73 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 SA170CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA170CHE3/73?
All SA170CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA170CHE3/73, 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 SA170CHE3/73 part is unused and in its original packaging.
Return procedure for SA170CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA170CHE3/73 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
