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Vishay General Semiconductor - Diodes Division SA33C-E3/54
- Part No.:
- SA33C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA33C-E3/54.pdf
- Description:
- TVS DIODE 33VWM 59VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,461
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Product details
Overview
SA33C-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 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), 53.3 V maximum clamping voltage at 9.4 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA33C-E3/54 datasheet, SA33C-E3/54 pinout, SA33C-E3/54 application, or SA33C-E3/54 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 and high-reliability packaging are required.
Technical Context
The SA33C-E3/54 operates as a bi-directional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
It delivers 500 W peak pulse power per the 10/1000 µs waveform standard, with clamping voltage tightly controlled at 53.3 V under 9.4 A transient current - critical for safeguarding 3.3 V/5 V logic interfaces and analog front-ends against ISO 7637-2 and IEC 61000-4-5 surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown threshold ensures reliable triggering above system operating voltage with margin. |
| VC @ IPPM | 53.3 V at 9.4 A - Clamping voltage limits downstream IC stress during 500 W transients; compatible with 3.3 V/5 V rail tolerance. |
| PPPM | 500 W - Peak pulse power rating per 10/1000 µs waveform supports automotive load-dump and inductive-switching surge immunity. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max | 175 °C - High junction temperature rating enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Bi-directional construction means no polarity marking; terminals are non-polarized and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both leads serve identical roles; conducts equally in either direction when VWM exceeded - eliminates orientation concerns during placement. |
| Leads (matte tin plated) | Interconnect interface | Solderable per J-STD-002/JESD 22-B102; withstands 275 °C dip soldering for 10 s; meets JESD 201 Class 1A whisker resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime; reduces parameter drift in harsh thermal cycles. |
| 500 W peak pulse power (10/1000 µs) | Withstands repetitive automotive load-dump events without degradation; supports >100,000 surge cycles per JEDEC standards. |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, body controllers, and ADAS sensor modules. |
| Bi-directional symmetry | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded power domains without external biasing. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes let-through energy to protected circuitry; improves margin for sensitive analog and mixed-signal ICs. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and load-dump transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching PHY layer. Use Value: Maintains signal fidelity under ISO 10605 ESD (±30 kV air) and ISO 7637-2 Pulse 5a (12 V system), preventing latch-up or damage to 5 V tolerant receivers. |
Use Scenario: Safeguarding PLC digital input modules and analog acquisition channels exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Primary transient suppressor across 24 V DC input terminals and isolated signal lines. Use Value: Limits transient overshoot to ≤53.3 V, ensuring compatibility with 30 V-rated optocouplers and microcontroller GPIOs while sustaining 175 °C ambient operation. |
| Telecom Power Rail Protection | Consumer Device USB Port |
Use Scenario: Clamping induced surges on -48 V telecom power feeds and data line pairs in base station remote radio units. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary DC input and secondary signal lines to meet IEC 61000-4-5 Level 4 (4 kV) requirements. Use Value: Delivers 500 W pulse handling without derating at elevated temperatures, supporting long-term deployment in outdoor cabinets. |
Use Scenario: ESD protection for USB 2.0 D+/D− lines and VBUS in portable audio/video devices and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp placed adjacent to connector to suppress ±15 kV contact discharge per IEC 61000-4-2. Use Value: Sub-1 µA leakage at 33 V prevents battery drain in standby mode; DO-15 form factor allows manual rework and cost-effective through-hole assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same VWM (33 V), lower PPPM (400 W), SMA package (surface-mount), higher VC (53.3 V → 56.2 V at 7.1 A) | Preferred for space-constrained PCBs; less suitable for high-energy 10/1000 µs surges requiring full 500 W rating. | Select SMAJ33CA only if board area is critical and surge energy remains within 400 W limit; verify layout thermal relief for SMA footprint. |
| 1.5KE33CA | Same VWM (33 V), same PPPM (500 W), larger DO-201AD package, higher IFSM (100 A vs. 70 A), higher VC (55.5 V at 9.0 A) | Better suited for high-current industrial power supply inputs; less ideal for compact sensor modules due to size and lead inductance. | Choose 1.5KE33CA when surge current exceeds 9.4 A or when enhanced mechanical robustness is needed; confirm board clearance for larger DO-201AD body. |
Compared with SMAJ33CA and 1.5KE33CA, the SA33C-E3/54 offers optimal balance of 500 W capability, AEC-Q101 qualification, and DO-15 manufacturability - making it preferred for automotive and industrial through-hole designs where reliability and proven surge margin are prioritized over miniaturization or extreme current handling.
Availability
SA33C-E3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC development, and telecom infrastructure projects requiring stable component supply and long-term lifecycle support.
Supply support for SA33C-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SAxxC series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in automotive, industrial, and communications systems where bidirectional clamping and AEC-Q101 compliance are mandatory.
FAQ
What is the polarity configuration of the SA33C-E3/54?
The SA33C-E3/54 is a bi-directional TVS diode with symmetrical terminal behavior - neither lead is marked as anode or cathode, and it clamps voltage transients equally in both directions. This eliminates orientation dependency during PCB assembly and supports AC-coupled or floating signal line protection without external biasing networks.
Does the SA33C-E3/54 meet automotive qualification standards?
Yes, the SA33C-E3/54 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. This certification confirms its suitability for under-hood and chassis-mounted automotive applications such as body control modules and sensor interfaces.
What is the maximum clamping voltage of the SA33C-E3/54 under surge conditions?
The SA33C-E3/54 has a maximum clamping voltage (VC) of 53.3 V at 9.4 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured per the test conditions defined in the Vishay datasheet document 88378 and ensures predictable let-through voltage for downstream 3.3 V and 5 V ICs.
Can the SA33C-E3/54 be used in surface-mount designs?
No - the SA33C-E3/54 uses a DO-204AC (DO-15) axial-leaded package intended for through-hole mounting. For surface-mount alternatives with similar electrical specs, consider the SMAJ33CA (SMA package) or SMCJ33CA (SMC package), though these differ in thermal performance, surge rating, and qualification status.
How does the SA33C-E3/54 compare to uni-directional variants like SA33A-E3/54?
The SA33C-E3/54 differs from SA33A-E3/54 in polarity: SA33C is bi-directional (no band marking, symmetrical clamping), while SA33A is uni-directional (cathode band marked, forward voltage drop ~3.5 V at 100 A). SA33C-E3/54 is selected for AC, differential, or floating circuits; SA33A-E3/54 suits DC power rail protection with defined polarity.
SA33C-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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- 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)
SA33C-E3/54 FAQ
1.How can I place an order for SA33C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA33C-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 SA33C-E3/54 reliable?
The price and inventory of SA33C-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 SA33C-E3/54 is usually 5 days.
3.What payment methods are accepted for SA33C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA33C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA33C-E3/54?
SA33C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA33C-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 SA33C-E3/54?
For technical support, including SA33C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA33C-E3/54 requirements.
6.How does Aetrix verify that SA33C-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA33C-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 SA33C-E3/54 meets industry standards.
7.What is the process for return or replacement of SA33C-E3/54?
All SA33C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA33C-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 SA33C-E3/54 part is unused and in its original packaging.
Return procedure for SA33C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA33C-E3/54 Tags
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