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Vishay General Semiconductor - Diodes Division SA45CHE3/73
- Part No.:
- SA45CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA45CHE3/73.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,877
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Product details
Overview
SA45CHE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features a 45 V stand-off voltage (VWM), 500 W peak pulse power (10/1000 μs), 72.7 V maximum clamping voltage at 6.9 A peak pulse current, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA45CHE3/73 datasheet, SA45CHE3/73 pinout, SA45CHE3/73 application, or SA45CHE3/73 equivalent, this device is selected for robust overvoltage protection in automotive sensor interfaces, industrial I/O ports, and telecom line receivers where bidirectional surge immunity and low leakage (<1.0 μA at 45 V) are critical.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 50.0 V and 55.3 V at 1.0 mA test current. Its clamping performance is validated under standardized 10/1000 μs waveform conditions, delivering consistent 72.7 V clamping at 6.9 A IPPM while maintaining <0.1 % duty cycle compliance.
The device uses glass-passivated junction technology and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Its thermal design supports operation from –55 °C to +175 °C junction temperature, with 3.0 W steady-state power dissipation on infinite heatsink at 75 °C lead temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 50.0 V / 55.3 V at 1.0 mA - Ensures predictable turn-on threshold with tight 10.6 % tolerance for reliable transient detection. |
| VC @ IPPM | 72.7 V at 6.9 A - Clamping voltage during 10/1000 μs surge; limits downstream voltage stress to safe levels for 3.3 V/5 V ICs. |
| PPPM | 500 W - Peak pulse power handling capability; sustains high-energy transients like ISO 7637-2 Pulse 1/2a without failure. |
| ID @ VWM | <1.0 μA - Ultra-low reverse leakage ensures minimal power loss and no signal distortion in high-impedance sensor lines. |
| TJ max | +175 °C - High junction temperature rating enables use in under-hood automotive environments and industrial enclosures. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with UL 94 V-0 molded epoxy; compatible with through-hole reflow and wave soldering. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, cylindrical epoxy body, no polarity marking (bi-directional configuration). Leads are matte tin-plated, solderable per J-STD-002, with 0.375" (9.5 mm) lead length standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | No functional distinction between terminals; either lead serves as input/output for bidirectional clamping. |
| Case | Non-electrical mechanical interface | Molded epoxy body provides mechanical stability, flame resistance (UL 94 V-0), and environmental sealing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails. |
| Glass passivated chip junction | Enables stable VBR and low leakage over lifetime, even under thermal cycling and humidity stress. |
| 500 W peak pulse power (10/1000 μs) | Withstands repetitive surges per ISO 7637-2 and IEC 61000-4-5 Level 4 without parameter shift or degradation. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive switch-off), improving system immunity. |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance; suitable for long-life industrial and automotive production programs. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning ICs. Use Value: Maintains signal integrity under ISO 16750-2 load dump (up to 35 V) and ISO 7637-2 Pulse 5a, with VC = 72.7 V limiting downstream voltage stress. |
Use Scenario: Safeguarding PLC digital input modules and analog acquisition channels against field-induced surges from solenoid switching or lightning coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, coordinated with series impedance to limit let-through energy. Use Value: Delivers 500 W surge handling with <1.0 μA leakage at 45 V, enabling high-impedance sensing without offset drift or power loss. |
| Telecom Line Receiver Protection | Consumer Power Adapter Input Protection |
Use Scenario: Shielding Ethernet PHY front-ends and DSL line drivers from induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: First-stage transient suppressor on differential pair inputs, paired with common-mode chokes for balanced protection. Use Value: Symmetric bi-directional response ensures equal clamping on both conductors, preserving signal common-mode rejection ratio (CMRR). |
Use Scenario: Input-stage surge suppression in AC-DC adapters and USB-C PD chargers exposed to mains-borne transients. IC Role / Device Role / Timing Role: Secondary-level protector downstream of MOVs, absorbing residual energy and limiting let-through voltage to rectifier bridge. Use Value: 72.7 V clamping at 6.9 A prevents overvoltage damage to bridge rectifiers and bulk capacitors during IEC 61000-4-5 surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45CA | Same VWM (45 V), identical DO-214AC (SMA) package, but lower PPPM (400 W) and higher VC (73.0 V at 5.5 A). | Preferred for space-constrained PCBs where surface-mount is mandatory; less robust for high-repetition surges. | Select SMAJ45CA when board real estate is limited and surge repetition rate is low (e.g., consumer electronics). |
| 1.5KE45CA | Higher PPPM (1500 W), larger DO-201AD package, same VWM/VBR range, but slower response due to higher junction capacitance (~150 pF vs. ~50 pF). | Better suited for high-energy power-line protection; not ideal for high-speed data lines due to capacitance. | Choose 1.5KE45CA for primary AC input protection where energy absorption dominates over signal fidelity. |
Compared with SMAJ45CA and 1.5KE45CA, SA45CHE3/73 offers optimal balance of automotive qualification, axial through-hole manufacturability, and 500 W surge capacity-making it preferred for cost-sensitive, high-reliability automotive and industrial designs requiring proven AEC-Q101 compliance and DO-15 compatibility.
Availability
SA45CHE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial programmable logic controllers, and telecom line receiver circuits requiring stable component supply and long-term lifecycle support.
Supply support for SA45CHE3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SAxxCH series delivers AEC-Q101-qualified TVS diodes optimized for harsh-environment transient suppression in automotive powertrain, chassis, and body electronics.
FAQ
What is the polarity configuration of SA45CHE3/73?
The SA45CHE3/73 is a bi-directional Transient Voltage Suppressor, meaning it has no designated anode or cathode. Both terminals are functionally identical and provide symmetrical clamping in either direction. There is no polarity marking on the DO-204AC package, confirming its bidirectional operation per Vishay's SAxxCA family designation.
Is SA45CHE3/73 suitable for automotive applications?
Yes, SA45CHE3/73 carries the HE3 suffix, indicating AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It meets automotive requirements for temperature cycling, humidity resistance, and surge endurance, making it appropriate for engine control units, ADAS sensor interfaces, and body electronics where reliability under vibration and thermal stress is critical.
What is the maximum clamping voltage of SA45CHE3/73 under surge conditions?
The SA45CHE3/73 has a maximum clamping voltage (VC) of 72.7 V at 6.9 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 7–10 in Vishay document 88378 and defines the upper voltage limit imposed on protected circuitry during transient events.
How does SA45CHE3/73 differ from uni-directional SA45A variants?
Unlike the uni-directional SA45A, the SA45CHE3/73 is bi-directional (denoted by "CA" in part numbering), with symmetrical VBR and VC characteristics in both polarities. It lacks a cathode band marking and supports AC-coupled or floating signal lines, whereas SA45A requires correct polarity orientation and is used only in DC-biased applications.
What packaging and plating specifications apply to SA45CHE3/73?
SA45CHE3/73 uses the DO-204AC (DO-15) package with molded UL 94 V-0 epoxy and matte tin-plated leads. The HE3 suffix confirms compliance with JESD 201 Class 2 whisker testing and RoHS Directive 2011/65/EU, supporting lead-free assembly and long-term storage stability in industrial and automotive supply chains.
SA45CHE3/73 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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 80.3V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- 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)
SA45CHE3/73 FAQ
1.How can I place an order for SA45CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA45CHE3/73 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 SA45CHE3/73 reliable?
The price and inventory of SA45CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA45CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA45CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA45CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA45CHE3/73?
SA45CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA45CHE3/73 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 SA45CHE3/73?
For technical support, including SA45CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA45CHE3/73 requirements.
6.How does Aetrix verify that SA45CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA45CHE3/73 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 SA45CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA45CHE3/73?
All SA45CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA45CHE3/73, 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 SA45CHE3/73 part is unused and in its original packaging.
Return procedure for SA45CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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