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Vishay General Semiconductor - Diodes Division SA45CAHE3/54
- Part No.:
- SA45CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA45CAHE3/54.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
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Product details
Overview
SA45CAHE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 45 V standoff voltage (VWM), 50.0–55.3 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), 72.7 V maximum clamping voltage at 6.9 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA45CAHE3/54 datasheet, SA45CAHE3/54 pinout, SA45CAHE3/54 application, or SA45CAHE3/54 equivalent, this device is selected for robust ESD and surge protection in bidirectional DC rails, sensor interfaces, and automotive control modules where low-leakage, fast response, and high-reliability transient suppression are required.
Technical Context
The SA45CAHE3/54 operates as a symmetrical avalanche diode with identical forward and reverse breakdown characteristics, enabling bidirectional clamping without polarity dependency. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, critical for consistent clamping under repetitive transients.
Designed for 10/1000 μs waveform compliance, it delivers 6.9 A peak pulse current (IPPM) while maintaining ≤72.7 V clamping voltage - supporting IEC 61000-4-5 Level 3 (1 kV line-to-line) surge immunity in compact PCB layouts. Thermal derating follows JEDEC JESD22-A104 up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse/forward operating voltage before clamping begins |
| VBR @ IT = 1 mA | 50.0–55.3 V - Guaranteed avalanche onset range, ensuring predictable turn-on during overvoltage events |
| VC @ IPPM = 6.9 A | 72.7 V - Clamped voltage under 500 W surge, limiting downstream IC stress to safe levels |
| IPPM | 6.9 A - Peak current handling for 10/1000 μs waveform, defining surge energy absorption capability |
| PPPM | 500 W - Transient power dissipation capacity, enabling protection against lightning-induced surges |
| TJ max. | 175 °C - Maximum junction temperature, supporting operation in under-hood automotive environments |
| Leakage @ VWM | 1.0 μA - Ultra-low reverse leakage preserves signal integrity in high-impedance sensor circuits |
Pinout & Package
SA45CAHE3/54 uses the DO-15 (DO-204AC) axial-leaded package: molded epoxy body, matte tin-plated leads, RoHS-compliant, AEC-Q101 qualified, and rated for solder dip at 275 °C (10 s). No polarity marking - symmetric bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either lead serves as input/output terminal; no cathode band - enables flexible placement on AC-coupled or floating lines |
| Lead 1 / Lead 2 | Current path terminals | Full surge current (6.9 A) flows through both leads equally; no internal asymmetry or directionality |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| 500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and vehicle subsystems |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transient events, protecting 48 V-rated components |
| 1.0 μA max reverse leakage @ VWM | Preserves accuracy in precision analog front-ends and battery-monitoring circuits |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors exposed to load dump and inductive switching noise in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient spikes on differential sensor outputs prior to signal conditioning amplifiers. Use Value: Prevents latch-up or damage to downstream op-amps and ADCs by limiting voltage to ≤72.7 V during 100 V/500 ms load dump events. | Use Scenario: Shielding CAN_H/CAN_L lines in factory automation PLCs from EFT and surge coupling via shared chassis ground. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp absorbing common-mode transients without distorting 1 Mbps CAN signaling. Use Value: Maintains signal integrity with <1 pF junction capacitance and sub-nanosecond response, avoiding bit errors during 4 kV EFT bursts. |
| Consumer Power Adapter Input | Telecom DC Feeder Line |
Use Scenario: Safeguarding primary-side controller ICs in universal-input AC/DC adapters subjected to line surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Front-end transient suppressor across bulk capacitor inputs, diverting surge energy before rectifier and controller stages. Use Value: Withstands repeated 500 W surges without degradation, extending adapter field life in regions with unstable mains supply. | Use Scenario: Protecting PoE-powered remote radio units connected to outdoor telecom cabinets with long DC feeder runs. IC Role / Device Role / Timing Role: Bidirectional rail clamp on +48 V DC feed line, suppressing induced lightning surges entering via metallic cable sheaths. Use Value: Enables compliance with GR-1089-CORE Level 3 (6 kV/30 Ω) surge testing while maintaining <1 μA standby leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-E3/5A | Unidirectional; same VWM, VBR, and PPPM, but requires correct polarity orientation | Not suitable for AC-coupled or floating-bus applications; limited to DC rails with defined ground reference | Select only when circuit topology guarantees fixed polarity and space constraints favor SMA package |
| 1.5KE45CA | Same bidirectional function, DO-201 package; higher IPPM (13.3 A), larger footprint, lower thermal resistance | Better suited for high-energy surge zones (e.g., main power entry), less ideal for dense sensor nodes | Choose when system-level surge testing exceeds 500 W or board layout allows larger axial package |
Compared with SMAJ45A-E3/5A and 1.5KE45CA, SA45CAHE3/54 uniquely combines AEC-Q101 qualification, DO-15 form factor, and bidirectional symmetry - making it optimal for space-constrained, automotive-grade, floating-node protection where polarity-agnostic clamping is mandatory.
Availability
SA45CAHE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom DC feeder protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SA45CAHE3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SAxxCA series targets high-reliability transient suppression in harsh environments, with design focus on AEC-Q101 compliance, low clamping ratio, and stable parametric performance across temperature and lifetime.
FAQ
What is the polarity configuration of SA45CAHE3/54?
SA45CAHE3/54 is a bidirectional TVS diode with symmetrical avalanche characteristics - neither lead is marked as anode or cathode. This allows installation in either orientation on AC-coupled, floating, or differential signal lines without risk of reverse bias damage. The absence of a color band confirms its bidirectional nature per Vishay's SAxxCA family designation.
Does SA45CAHE3/54 meet automotive qualification standards?
Yes, SA45CAHE3/54 carries the HE3 suffix, indicating full AEC-Q101 qualification. It has passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and radar sensor interfaces.
What is the maximum clamping voltage of SA45CAHE3/54 under surge conditions?
The maximum clamping voltage (VC) of SA45CAHE3/54 is 72.7 V at 6.9 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
How does SA45CAHE3/54 differ from unidirectional variants like SA45AHE3/54?
SA45CAHE3/54 provides identical clamping in both directions due to its symmetrical structure, whereas SA45AHE3/54 is unidirectional and conducts only in reverse bias - requiring correct polarity placement. The "CA" suffix explicitly denotes bidirectional functionality, enabling use in AC signal paths or floating buses where voltage polarity reverses, unlike the "A" variant.
Is SA45CAHE3/54 compatible with lead-free reflow processes?
SA45CAHE3/54 is RoHS-compliant (E3/HE3 suffix) and rated for solder dip at 275 °C for 10 seconds per JESD22-B106. While optimized for wave soldering, its matte tin-plated leads are compatible with standard lead-free reflow profiles (peak 260 °C), provided preheat and soak times adhere to JEDEC J-STD-020 guidelines to avoid thermal shock to the glass-passivated junction.
SA45CAHE3/54 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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- 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)
SA45CAHE3/54 FAQ
1.How can I place an order for SA45CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA45CAHE3/54 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 SA45CAHE3/54 reliable?
The price and inventory of SA45CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA45CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA45CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA45CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA45CAHE3/54?
SA45CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA45CAHE3/54 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 SA45CAHE3/54?
For technical support, including SA45CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA45CAHE3/54 requirements.
6.How does Aetrix verify that SA45CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA45CAHE3/54 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 SA45CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA45CAHE3/54?
All SA45CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA45CAHE3/54, 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 SA45CAHE3/54 part is unused and in its original packaging.
Return procedure for SA45CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA45CAHE3/54 Tags
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