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Vishay General Semiconductor - Diodes Division SA28CA-E3/54
- Part No.:
- SA28CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA28CA-E3/54.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
SA28CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for robust overvoltage protection of sensitive electronics. It features 500 W peak pulse power (10/1000 μs), 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR at 1 mA), clamping voltage of 45.4 V at 11 A peak pulse current, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA28CA-E3/54 datasheet, SA28CA-E3/54 pinout, SA28CA-E3/54 application, or SA28CA-E3/54 equivalent, this device is selected for high-energy transient suppression in DC power rails, sensor interfaces, and automotive control modules where bidirectional surge immunity and low clamping ratio are critical.
Technical Context
The SA28CA-E3/54 operates as a symmetrical silicon avalanche diode, exhibiting identical electrical characteristics in both forward and reverse directions due to its bidirectional construction. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping behavior under repetitive 10/1000 μs transients up to 0.01% duty cycle.
Designed for operation across -55 °C to +175 °C junction temperature range, it delivers 3.0 W steady-state power dissipation on infinite heatsink at 75 °C lead temperature and maintains <1.0 μA maximum reverse leakage at 28 V stand-off, ensuring minimal standby power impact in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 24 V automotive systems. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 45.4 V at 11 A - Clamping voltage limits downstream IC stress during 10/1000 μs surges; clamping ratio = 1.62×VWM. |
| PPPM | 500 W - Peak pulse power rating per 10/1000 μs waveform supports IEC 61000-4-5 Level 4 (4 kV) surge compliance with margin. |
| IPPM | 11 A - Peak pulse current capability directly correlates to surge energy handling (E ≈ 0.22 J for 10/1000 μs). |
| TJ max | +175 °C - High junction temperature rating enables use in under-hood automotive environments without derating. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, body controllers, and ADAS sensor interfaces. |
Pinout & Package
SA28CA-E3/54 uses the DO-15 (DO-204AC) axial-leaded package: molded epoxy body, matte tin-plated leads solderable per J-STD-002, UL 94 V-0 rated, with no polarity marking (bidirectional symmetry). Lead length ≥25.4 mm, body diameter 3.3–3.5 mm, total length ≥25.4 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | No polarity designation; either lead functions identically as input/output for transient clamping in AC or floating DC paths. |
| Lead 1 | Current path terminal | Provides low-inductance connection to protected line; lead resistance ≤0.05 Ω supports high di/dt surge conduction. |
| Lead 2 | Current path terminal | Matches Lead 1 electrically and thermally; symmetric layout avoids orientation-dependent performance in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under thermal cycling and humidity exposure. |
| 500 W peak pulse power (10/1000 μs) | Supports repeated surge events in industrial motor drives and automotive load-dump scenarios without degradation. |
| AEC-Q101 qualification | Validates performance across temperature, vibration, and lifetime stress tests required for automotive ECUs and sensors. |
| Low clamping voltage (45.4 V @ 11 A) | Protects 3.3 V/5 V logic interfaces and MOSFET gate drivers by limiting transient overshoot below 50 V absolute maximum ratings. |
| DO-15 mechanical robustness | Withstands 275 °C solder dip (10 s) and meets JESD 201 Class 1A whisker resistance, enabling reliable through-hole reflow assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump and jump-start transients on 24 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, responding within <1 ns to limit voltage excursions. Use Value: Maintains system uptime by preventing latch-up or permanent damage to microcontrollers and CAN transceivers during ISO 16750-2 pulses. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transients on signal lines while preserving signal integrity up to 1 MHz bandwidth. Use Value: Enables direct connection to 24 V field wiring without external series impedance, reducing BOM count and board space. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Control |
Use Scenario: Protecting Ethernet PHY power supplies and bias rails against lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage, absorbing >90% of 10/1000 μs surge energy before secondary protection activates. Use Value: Extends mean time between failures (MTBF) by eliminating recurrent fuse blowing and regulator damage in unattended deployments. |
Use Scenario: Safeguarding H-bridge gate drivers and MCU I/O from back-EMF spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Fast-clamping component placed across motor terminals or driver supply pins to clamp inductive kickback. Use Value: Eliminates need for snubber RC networks, reducing component count and improving efficiency in cost-sensitive white goods designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-E3/57 | Surface-mount SMA package (vs. DO-15 through-hole); same VWM (28 V), slightly higher VC (48.4 V @ 10.3 A); lower PPPM (400 W). | Preferred for space-constrained PCBs with automated SMT assembly; unsuitable for high-vibration environments requiring mechanical anchoring. | Select SMAJ28A-E3/57 when board real estate is limited and reflow compatibility is mandatory; verify mechanical retention for automotive under-hood use. |
| 1.5KE27CA | Higher PPPM (1500 W), larger DO-201 package; VWM = 27 V (closer match), VC = 43.5 V @ 34.5 A; not AEC-Q101 qualified. | Better suited for heavy industrial surge environments (e.g., PLC main inputs); lacks automotive qualification and tighter VBR tolerance. | Choose 1.5KE27CA only for non-automotive applications demanding higher energy absorption; avoid where AEC-Q101 compliance is contractually required. |
Compared with SMAJ28A-E3/57 and 1.5KE27CA, SA28CA-E3/54 uniquely balances AEC-Q101 qualification, DO-15 mechanical ruggedness, and precise 28 V stand-off for automotive 24 V systems-making it the default choice when reliability under thermal and mechanical stress is prioritized over footprint or raw power rating.
Availability
SA28CA-E3/54 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor nodes, and telecom power supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SA28CA-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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SAxxCA series was engineered specifically for bidirectional transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of SA28CA-E3/54 under standard test conditions?
The SA28CA-E3/54 has a maximum clamping voltage (VC) of 45.4 V at 11 A peak pulse current (IPPM) using the 10/1000 μs waveform. This value is measured per JEDEC standards and reflects the actual voltage seen by protected circuitry during surge events. The clamping occurs rapidly (<1 ns), and VC remains stable across temperature and lifetime-critical for safeguarding 3.3 V and 5 V logic interfaces downstream of the SA28CA-E3/54.
Is SA28CA-E3/54 suitable for automotive applications?
Yes, SA28CA-E3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its DO-15 package withstands mechanical shock and thermal cycling per automotive requirements, and its -55 °C to +175 °C operating range covers under-hood and cabin environments. The SA28CA-E3/54 is commonly deployed in engine control modules, body control units, and ADAS sensor power rails-where bidirectional surge immunity and validated reliability are non-negotiable.
How does the bidirectional nature of SA28CA-E3/54 affect its placement in a circuit?
The SA28CA-E3/54 has no polarity marking and behaves identically in both directions, making it ideal for protecting AC-coupled signals, floating DC buses, or differential pairs where voltage polarity may reverse. Unlike unidirectional TVS diodes, the SA28CA-E3/54 requires no orientation check during placement-reducing assembly errors and enabling symmetric PCB layout. This simplifies design for applications like CAN bus termination or dual-rail sensor interfaces where the SA28CA-E3/54 serves as a single-point bidirectional clamp.
What is the reverse leakage current of SA28CA-E3/54 at its rated stand-off voltage?
At 28 V (VWM) and 25 °C, the SA28CA-E3/54 exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage ensures negligible power loss in always-on systems such as automotive wake-up circuits or battery-backed sensors. Leakage remains below 5 μA up to 80% of VWM, confirming stable blocking behavior well within normal operating margins of the SA28CA-E3/54.
Can SA28CA-E3/54 be used in parallel for higher surge current handling?
No-SA28CA-E3/54 is not recommended for parallel operation due to inherent VBR mismatch (31.1–34.4 V range), which causes uneven current sharing and potential thermal runaway. For higher surge capability, select a single higher-rated device (e.g., SA33CA-E3/54) or implement staged protection with upstream fusing. The SA28CA-E3/54's 11 A IPPM is calibrated for standalone use; paralleling compromises reliability and violates Vishay's application guidance.
SA28CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 11A
- 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)
SA28CA-E3/54 FAQ
1.How can I place an order for SA28CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA28CA-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 SA28CA-E3/54 reliable?
The price and inventory of SA28CA-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 SA28CA-E3/54 is usually 5 days.
3.What payment methods are accepted for SA28CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA28CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA28CA-E3/54?
SA28CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA28CA-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 SA28CA-E3/54?
For technical support, including SA28CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA28CA-E3/54 requirements.
6.How does Aetrix verify that SA28CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA28CA-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 SA28CA-E3/54 meets industry standards.
7.What is the process for return or replacement of SA28CA-E3/54?
All SA28CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA28CA-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 SA28CA-E3/54 part is unused and in its original packaging.
Return procedure for SA28CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA28CA-E3/54 Tags
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