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Vishay General Semiconductor - Diodes Division SA45C-E3/54
- Part No.:
- SA45C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA45C-E3/54.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,775
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Product details
Overview
SA45C-E3/54 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 a 45 V stand-off voltage (VWM), 500 W peak pulse power (10/1000 μs), clamping voltage of 72.7 V at 6.9 A peak pulse current, and operates from –55 °C to +175 °C - suitable for automotive sensor line protection and industrial I/O interface surge suppression.
For engineers reviewing the SA45C-E3/54 datasheet, SA45C-E3/54 pinout, SA45C-E3/54 application, or SA45C-E3/54 equivalent, this page delivers verified electrical parameters, polarity behavior, thermal derating curves, AEC-Q101 qualification status, and direct replacement guidance for circuit-level ESD and lightning surge protection design.
Technical Context
The SA45C-E3/54 implements a bi-directional avalanche breakdown structure with symmetrical clamping in both polarities, enabling transient suppression on AC-coupled or floating lines without polarity sensitivity. Its glass-passivated junction ensures stable VBR (min 50.0 V, max 55.3 V at 1 mA) and low incremental surge resistance, critical for fast response (<1 ns) to EFT and surge events per IEC 61000-4-2/4-4/4-5.
It is rated for 500 W peak pulse power under 10/1000 μs waveform at TA = 25 °C, with steady-state power dissipation of 3.0 W on infinite heatsink at TL = 75 °C. The device exhibits a temperature coefficient of +0.052 %/°C for breakdown voltage and meets JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 36–42 V nominal systems. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - guaranteed avalanche onset range; ensures consistent clamping threshold across production lots. |
| VC @ IPPM | 72.7 V at 6.9 A - maximum clamped voltage during 10/1000 μs surge; determines protected circuit's peak stress level. |
| PPPM | 500 W - peak transient power handling capability; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| TJ Range | –55 °C to +175 °C - extended junction temperature rating enables under-hood automotive and industrial motor drive use. |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with UL 94 V-0 molded epoxy; compatible with wave and reflow soldering (275 °C, 10 s max). |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock per JEDEC standards. |
Pinout & Package
SA45C-E3/54 is a two-terminal bi-directional TVS diode in DO-204AC (DO-15) package. No polarity marking is present on the body, as conduction occurs symmetrically in both directions. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals; either lead may connect to line or ground - enables flexible PCB layout for AC or differential signal paths. |
| Case (body) | Non-conductive epoxy housing | Provides mechanical protection and UL 94 V-0 flame resistance; no thermal or electrical connection to silicon die. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled, floating, or differential bus lines (e.g., RS-485, CAN, sensor bridges) without polarity concerns. |
| 500 W peak pulse power (10/1000 μs) | Supports robust immunity to IEC 61000-4-5 surges up to 1 kV open-circuit / 0.5 kA short-circuit in 2 Ω source impedance configurations. |
| AEC-Q101 qualification | Validates long-term reliability in automotive environments including engine control units, body electronics, and ADAS sensor interfaces. |
| Glass-passivated junction | Ensures stable breakdown voltage over time and temperature, with minimal parameter drift after 1000 h HTOL stress at 150 °C. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transients - critical for protecting 48 V-rated logic inputs and analog front-ends in industrial PLCs. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting wheel speed, pressure, or temperature sensor outputs exposed to load dump and ISO 7637-2 pulses in vehicle chassis wiring. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between signal line and chassis ground, absorbing ±100 V transients within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADC drivers while maintaining signal integrity below 75 V peak. |
Use Scenario: Shielding RS-485 transceivers (e.g., SN65HVD230) from ESD and surge events in factory automation networks. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS pair (two SA45C-E3/54 devices) suppressing common-mode and differential-mode transients. Use Value: Enables >15 kV HBM ESD immunity and 4 kV IEC 61000-4-5 surge survivability without degrading data rate up to 10 Mbps. |
| 48 V DC Power Rail | Consumer Appliance Motor Control |
|
Use Scenario: Safeguarding 48 V battery-fed microcontrollers and MOSFET gate drivers in e-bike controllers and telecom rectifiers. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between rail and ground, triggered only above 45 V to avoid interference with normal regulation. Use Value: Limits rail voltage to ≤73 V during load dump (ISO 16750-2), preventing overvoltage shutdown and ensuring uninterrupted MCU operation. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Bi-directional clamp across motor terminals or flyback diode location, quenching inductive kickback in both rotation directions. Use Value: Eliminates contact arcing and reduces EMI emissions by clamping spikes to <75 V, meeting CISPR 14-1 conducted emission limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45CA | Same VWM (45 V), lower PPPM (400 W), SMA package (surface-mount), higher VC (73.0 V @ 5.5 A) | Preferred where board space is constrained and wave soldering is not used; less robust for high-energy surges. | Select SMAJ45CA for compact SMT layouts requiring RoHS-compliant reflow assembly; verify thermal relief for >100 surges/hour duty cycle. |
| 1.5KE45CA | Same VWM (45 V), higher PPPM (1500 W), DO-201 package (larger axial), lower VC (73.0 V @ 20.5 A) | Better suited for high-repetition surge environments (e.g., power supply input stages) but requires larger PCB footprint. | Choose 1.5KE45CA when system-level surge tests exceed IEC 61000-4-5 Level 4; confirm lead spacing compatibility with existing DO-15 footprints. |
Compared with SMAJ45CA and 1.5KE45CA, SA45C-E3/54 offers optimal balance of AEC-Q101 qualification, 500 W surge capacity, and DO-15 manufacturability - making it the preferred choice for automotive and industrial through-hole designs requiring proven field reliability and wave-solder compatibility.
Availability
SA45C-E3/54 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interface hardening, and 48 V DC power rail surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SA45C-E3/54 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SAxxC series was developed specifically for high-reliability bi-directional transient suppression in automotive and industrial environments, targeting AEC-Q101 compliance, wide temperature operation, and repeatable clamping behavior under repetitive surge stress.
FAQ
What is the polarity configuration of SA45C-E3/54?
The SA45C-E3/54 is a bi-directional TVS diode with symmetrical avalanche characteristics - neither terminal is designated anode or cathode. This allows installation in either orientation on AC-coupled or floating signal lines, simplifying layout and eliminating polarity-check steps during assembly. The device clamps equally for positive and negative transients above its 45 V stand-off voltage.
Does SA45C-E3/54 meet automotive qualification standards?
Yes, SA45C-E3/54 is AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and mechanical shock. This certification confirms suitability for under-hood and chassis-mounted applications where reliability under thermal and vibration stress is mandatory.
What is the maximum clamping voltage of SA45C-E3/54 during a surge event?
The SA45C-E3/54 has a maximum clamping voltage (VC) of 72.7 V at 6.9 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value represents the highest voltage seen across the device during worst-case surge conditions and defines the upper voltage limit imposed on protected circuitry.
Can SA45C-E3/54 be used in surface-mount designs?
No, SA45C-E3/54 uses a DO-204AC (DO-15) axial-leaded package intended for through-hole mounting and wave soldering. For surface-mount equivalents, consider SMAJ45CA (SMA package) or SMCJ45CA (SMC package); both share the same 45 V stand-off but differ in power rating, thermal profile, and footprint requirements.
How does SA45C-E3/54 perform at elevated ambient temperatures?
SA45C-E3/54 maintains full functionality up to +175 °C junction temperature. Its breakdown voltage increases linearly with temperature (+0.052 %/°C), and peak pulse power must be derated above TA = 25 °C per Figure 2 in the datasheet - e.g., ~75 % of 500 W is available at 75 °C ambient with proper lead heat sinking.
SA45C-E3/54 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA45C-E3/54 FAQ
1.How can I place an order for SA45C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA45C-E3/54 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 SA45C-E3/54 reliable?
The price and inventory of SA45C-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA45C-E3/54 is usually 5 days.
3.What payment methods are accepted for SA45C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA45C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA45C-E3/54?
SA45C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA45C-E3/54 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 SA45C-E3/54?
For technical support, including SA45C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA45C-E3/54 requirements.
6.How does Aetrix verify that SA45C-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA45C-E3/54 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 SA45C-E3/54 meets industry standards.
7.What is the process for return or replacement of SA45C-E3/54?
All SA45C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA45C-E3/54, 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 SA45C-E3/54 part is unused and in its original packaging.
Return procedure for SA45C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA45C-E3/54 Tags
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