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Vishay General Semiconductor - Diodes Division SA28CHE3/54
- Part No.:
- SA28CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA28CHE3/54.pdf
- Description:
- TVS DIODE 28VWM 50.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,619
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Product details
Overview
SA28CHE3/54 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 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V maximum clamping voltage (VC) at 11 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SA28CHE3/54 datasheet, SA28CHE3/54 pinout, SA28CHE3/54 application, or SA28CHE3/54 equivalent, this part serves as an AEC-Q101-qualified, RoHS-compliant bi-directional TVS for robust ESD and surge protection in space-constrained PCB layouts requiring stable clamping performance up to 175 °C junction temperature.
Technical Context
The SA28CHE3/54 operates as a bi-directional avalanche diode, leveraging glass-passivated junction technology to deliver symmetrical clamping in both polarities. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of inductive switching spikes and lightning-induced surges on bidirectional data or supply rails.
Designed for repetitive transient events at 0.01% duty cycle, it sustains 500 W peak pulse power per 10/1000 μs waveform and maintains ≤1.0 μA reverse leakage at 28 V (VWM). The device is rated for operating junction temperatures from –55 °C to +175 °C and qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 31.1–34.4 V at 1 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 45.4 V at 11 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 500 W - Maximum single-pulse energy handling capability; supports IEC 61000-4-5 Level 4 surge immunity designs. |
| ID (Reverse Leakage) | ≤1.0 μA at 28 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | +175 °C - Enables deployment in engine control units, motor drives, and other high-temperature environments without derating. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per AEC standard. |
Pinout & Package
SA28CHE3/54 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) | Bi-directional avalanche junction | No functional distinction between terminals; connects across protected line and ground (or rail-to-rail) without orientation constraint. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under thermal cycling and humidity stress. |
| 500 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 pulse 5a/b and IEC 61000-4-5 combination wave surges in 12 V/24 V systems. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules where field failure is unacceptable. |
| DO-204AC (DO-15) package | Standard through-hole footprint compatible with legacy assembly processes and manual repair; UL 94 V-0 rated molding compound. |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes let-through voltage during transients, reducing stress on sensitive 3.3 V or 5 V logic and analog front-ends. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital I/O Module |
|---|---|
Use Scenario: Protecting CAN transceiver power rails and microcontroller GPIOs from load dump and alternator ripple in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between VCC and GND to limit transient excursions during battery disconnection or relay switching. Use Value: Prevents latch-up or permanent damage to 3.3 V MCU cores and CAN PHYs by limiting peak rail voltage to ≤45.4 V during 500 W surges. |
Use Scenario: Safeguarding 24 V digital input channels against induced surges from nearby contactor switching in factory automation cabinets. IC Role / Device Role / Timing Role: Parallel-connected TVS on each opto-isolator input line to shunt fast-rising transients before they reach internal LED drivers. Use Value: Maintains signal integrity and prevents false triggering by clamping 1 kV/500 A surges within nanoseconds while adding zero propagation delay. |
| Telecom Base Station Power Interface | Consumer Appliance Motor Drive Board |
Use Scenario: Shielding 48 V DC power entry points in remote radio units from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage transient suppressor upstream of DC-DC converters and hot-swap controllers. Use Value: Absorbs up to 500 W of surge energy without degradation, enabling compliance with ITU-T K.20 and Telcordia GR-1089-CORE requirements. |
Use Scenario: Protecting gate drivers and bootstrap circuits in BLDC motor inverters from commutation spikes generated by high-dI/dt switching. IC Role / Device Role / Timing Role: Rail-to-rail TVS across half-bridge supply rails to clamp cross-conduction-induced voltage overshoot. Use Value: Limits voltage overshoot to <46 V, preventing gate oxide rupture in 60 V-rated MOSFETs during 100 ns edge transitions. |
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-E3/52 (Vishay) | Uni-directional; same VWM/VBR/VC specs but cathode-anode polarity required; SMA package (SMT). | Requires PCB polarity awareness and lacks bi-directional symmetry; better suited for DC-biased rails with known polarity. | Select when board space is limited and layout allows fixed orientation; not drop-in for SA28CHE3/54 due to polarity and package mismatch. |
| P6SMB28A (Littelfuse) | Same DO-204AC package and bi-directional configuration; VBR min/max tighter (31.1–33.6 V); VC = 45.7 V at 10.9 A. | Nearly identical clamping behavior and surge rating; minor variation in leakage (<1 μA vs. 0.5 μA) and thermal resistance. | Valid alternative for second-source procurement; verify thermal relief pad design matches P6SMB28A's slightly higher RθJA. |
Compared with SMAJ28A-E3/52 and P6SMB28A, the SA28CHE3/54 offers AEC-Q101 qualification out-of-box and guaranteed 175 °C operation - critical for automotive and high-reliability industrial use where qualification traceability and extended temperature margin are mandatory.
Availability
SA28CHE3/54 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power interfaces, and consumer appliance motor drives requiring stable component supply with full AEC-Q101 documentation and RoHS compliance.
Supply support for SA28CHE3/54 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, power efficiency, and automotive-grade validation.
The SAxxCH series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 qualification and 175 °C operation.
FAQ
What is the polarity configuration of SA28CHE3/54?
The SA28CHE3/54 is a bi-directional TVS diode with symmetrical terminal behavior - neither end is marked as anode or cathode. This enables placement across any two nodes (e.g., signal-to-ground or rail-to-rail) without orientation constraints, simplifying layout and eliminating risk of reverse installation.
Does SA28CHE3/54 meet automotive qualification standards?
Yes, SA28CHE3/54 carries the HE3 suffix indicating AEC-Q101 qualification. It has passed stress tests including temperature cycling, high-temperature operating life, and mechanical shock per AEC-Q101 Rev D, making it suitable for engine control, body electronics, and ADAS applications.
What is the maximum clamping voltage of SA28CHE3/54 under surge conditions?
The SA28CHE3/54 clamps to a maximum of 45.4 V when subjected to its rated 11 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, ensuring consistent protection margin for 3.3 V or 5 V logic interfaces.
Can SA28CHE3/54 be used in surface-mount designs?
No - SA28CHE3/54 uses the DO-204AC (DO-15) through-hole package. For SMT equivalents, consider Vishay's SMAJ28CA-E3/52 (bi-directional, SMA package) or SMF28A (SOD-123), though these differ in power rating, thermal performance, and qualification status.
What is the reverse leakage current specification for SA28CHE3/54 at rated VWM?
At 28 V reverse bias (VWM) and 25 °C, SA28CHE3/54 exhibits ≤1.0 μA maximum reverse leakage current (ID). This low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in battery-powered systems.
SA28CHE3/54 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 50.1V
- Current - Peak Pulse (10/1000µs):
- 10A
- 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)
SA28CHE3/54 FAQ
1.How can I place an order for SA28CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA28CHE3/54 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 SA28CHE3/54 reliable?
The price and inventory of SA28CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA28CHE3/54 is usually 5 days.
3.What payment methods are accepted for SA28CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA28CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA28CHE3/54?
SA28CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA28CHE3/54 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 SA28CHE3/54?
For technical support, including SA28CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA28CHE3/54 requirements.
6.How does Aetrix verify that SA28CHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA28CHE3/54 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 SA28CHE3/54 meets industry standards.
7.What is the process for return or replacement of SA28CHE3/54?
All SA28CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA28CHE3/54, 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 SA28CHE3/54 part is unused and in its original packaging.
Return procedure for SA28CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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