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Vishay General Semiconductor - Diodes Division SA45CHE3/54
- Part No.:
- SA45CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA45CHE3/54.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,535
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Product details
Overview
SA45CHE3/54 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 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 SA45CHE3/54 datasheet, SA45CHE3/54 pinout, SA45CHE3/54 application, or SA45CHE3/54 equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom power rails where bidirectional clamping, low leakage (<1.0 μA at VWM), and high-temperature operation (–55 °C to +175 °C) are required.
Technical Context
The SA45CHE3/54 operates as a bi-directional avalanche diode with symmetrical breakdown behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR (50.0–55.3 V) and low incremental surge resistance, critical for consistent clamping under repetitive transients.
Designed for 10/1000 μs waveform compliance, it delivers 500 W peak pulse power with derating above 25 °C ambient and supports 8.3 ms half-sine surge testing per JEDEC standards. The device exhibits a ±5 % temperature coefficient on VBR and maintains <1.0 μA reverse leakage at 45 V, confirming tight parametric control for precision protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 48 V nominal systems. |
| VBR min/max | 50.0 V / 55.3 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM | 72.7 V at 6.9 A - Clamped voltage during 10/1000 μs transient; limits downstream IC stress to sub-73 V under worst-case surge. |
| PPPM | 500 W - Peak pulse power handling capability; sustains industry-standard lightning/surge immunity tests (IEC 61000-4-5 Level 3). |
| ID @ VWM | <1.0 μA - Ultra-low reverse leakage at rated stand-off; preserves signal integrity and minimizes standby power loss. |
| TJ max | +175 °C - Maximum junction temperature; enables deployment in under-hood automotive or high-ambient industrial environments. |
| Qualification | AEC-Q101 qualified - Validated for automotive electronics per stress-test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
SA45CHE3/54 is housed in a DO-204AC (DO-15) molded epoxy package with matte tin-plated leads. Bi-directional construction means no polarity marking; both terminals are functionally identical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as clamping node; bidirectional avalanche action protects both positive and negative excursions equally. |
| Case (body) | Thermal and mechanical interface | DO-204AC body provides mechanical anchoring and limited heat dissipation; requires PCB copper area for thermal management above 3 W steady-state. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and leakage performance across humidity, temperature cycling, and extended service life. |
| 500 W peak pulse rating (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications without external series impedance. |
| AEC-Q101 qualification | Validated for automotive use including engine control units, ADAS sensors, and infotainment power supplies with zero marking requirement. |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualification and JESD 201 Class 2 whisker resistance-critical for lead-free reflow and high-reliability solder joints. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation essential for safety-critical systems in transportation and building automation. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching sensitive ASICs. Use Value: Maintains signal fidelity under –120 V to +120 V transients while surviving >1000 surges per AEC-Q101 test protocol. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against inductive kickback from solenoid/relay switching. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, coordinated with series current-limiting resistor for energy absorption. Use Value: Limits clamped voltage to ≤72.7 V, ensuring downstream optocoupler and microcontroller I/O remain within absolute maximum ratings. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding 48 V PoE-powered Ethernet switch ports from lightning-induced surges entering via Ethernet cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on DC supply rail upstream of DC/DC converters, complementing primary gas discharge tube (GDT) protection. Use Value: Responds in <1 ns to clamp fast-rising transients, preventing converter latch-up or MOSFET gate oxide damage. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to microcontroller-based motor drivers. IC Role / Device Role / Timing Role: Low-leakage bidirectional suppressor across motor terminals to absorb back-EMF without affecting PWM timing or feedback sensing. Use Value: Delivers 500 W pulse handling with <1.0 μA leakage at 45 V, eliminating standby current penalty in always-on appliance control boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-E3/54 | Uni-directional; 45 V VWM, 70.1 V VC @ 6.4 A; same DO-214AC package but different footprint and polarity sensitivity. | Requires correct orientation on PCB; unsuitable for AC or floating lines where polarity reversal may occur. | Select SMAJ45A-E3/54 only when unidirectional clamping suffices and board layout allows cathode alignment. |
| 1.5KE45CA | Higher power (1500 W), larger DO-201AD package; 45 V VWM, 73.0 V VC @ 20.5 A; not AEC-Q101 qualified. | Used in non-automotive industrial power supplies where space and qualification are secondary to surge margin. | Choose 1.5KE45CA when higher single-pulse energy absorption is needed and AEC-Q101 is not mandated. |
Compared with SMAJ45A-E3/54 and 1.5KE45CA, SA45CHE3/54 uniquely combines bi-directional symmetry, AEC-Q101 qualification, and DO-204AC compactness-making it optimal for space-constrained, automotive-grade signal line protection where polarity-agnostic clamping is mandatory.
Availability
SA45CHE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power rail protection requiring stable component supply and full traceability.
Supply support for SA45CHE3/54 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 qualification for harsh environments.
The SAxxCH series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for AEC-Q101-compliant automotive and industrial transient suppression where bidirectional clamping, low leakage, and high-temperature resilience are essential.
FAQ
What is the polarity configuration of SA45CHE3/54?
The SA45CHE3/54 is a bi-directional TVS diode with symmetrical avalanche characteristics in both directions. It has no cathode marking and can be installed in either orientation on the PCB-ideal for protecting AC-coupled signals, differential buses, or floating power domains where polarity reversal is possible. This eliminates orientation errors during assembly and simplifies layout for dual-polarity transient events.
Does SA45CHE3/54 meet automotive qualification standards?
Yes, SA45CHE3/54 is AEC-Q101 qualified, verified through standardized stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). The HE3 suffix explicitly denotes this qualification, making SA45CHE3/54 suitable for under-hood and chassis-mounted automotive applications such as body control modules and ADAS sensor interfaces.
What is the maximum clamping voltage of SA45CHE3/54 under surge conditions?
The SA45CHE3/54 clamps to a maximum of 72.7 V at its rated peak pulse current of 6.9 A (10/1000 μs waveform). This value is measured per standard test conditions and guarantees that downstream components experience no more than 72.7 V during a defined surge event-critical for ensuring compatibility with 75 V-rated ICs and MOSFETs in 48 V system architectures.
How does SA45CHE3/54 differ from uni-directional variants like SA45A-E3/54?
SA45CHE3/54 is bi-directional with no polarity marking and symmetric breakdown in both directions, whereas SA45A-E3/54 is uni-directional with a cathode band and only clamps positive transients. SA45CHE3/54 supports AC signal lines and floating grounds; SA45A-E3/54 requires correct orientation and is used where ground-referenced unidirectional protection suffices-such as DC power rails with known polarity.
Is SA45CHE3/54 RoHS compliant and lead-free compatible?
Yes, SA45CHE3/54 carries the HE3 suffix, indicating full RoHS compliance per Directive 2011/65/EU and compatibility with lead-free reflow soldering profiles up to 260 °C peak. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and the HE3 designation confirms JESD 201 Class 2 whisker resistance-ensuring long-term joint integrity in automotive and industrial assemblies.
SA45CHE3/54 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:
- 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)
SA45CHE3/54 FAQ
1.How can I place an order for SA45CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA45CHE3/54 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 SA45CHE3/54 reliable?
The price and inventory of SA45CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA45CHE3/54 is usually 5 days.
3.What payment methods are accepted for SA45CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA45CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA45CHE3/54?
SA45CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA45CHE3/54 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 SA45CHE3/54?
For technical support, including SA45CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA45CHE3/54 requirements.
6.How does Aetrix verify that SA45CHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA45CHE3/54 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 SA45CHE3/54 meets industry standards.
7.What is the process for return or replacement of SA45CHE3/54?
All SA45CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA45CHE3/54, 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 SA45CHE3/54 part is unused and in its original packaging.
Return procedure for SA45CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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