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Vishay General Semiconductor - Diodes Division SA15CA/54
- Part No.:
- SA15CA/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA15CA/54.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,658
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Product details
Overview
SA15CA/54 from Littelfuse is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-204AC (Axial) package, designed for robust overvoltage protection of sensitive electronics. It features a 15 V stand-off voltage (VWM), 16.7–20.4 V breakdown voltage (VBR), 26.9 V clamping voltage (VC) at 18.6 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial power supplies, automotive ECUs, and communication interface lines.
For engineers reviewing the SA15CA/54 datasheet, SA15CA/54 pinout, SA15CA/54 application, or SA15CA/54 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC DO-204AC mechanical data, thermal derating curves, and real-world selection guidance for surge-prone DC bus and signal line protection.
Technical Context
The SA15CA/54 is a glass-passivated, bidirectional TVS diode optimized for fast transient suppression in both polarities without polarity dependence. Its junction structure enables sub-nanosecond response to unidirectional transients and 5 ns response for bidirectional surges, with low incremental surge resistance ensuring stable clamping under repetitive 10/1000 µs pulses at 0.01% duty cycle.
It operates across –55 °C to +175 °C junction temperature range and maintains <1.0 µA maximum reverse leakage at VWM = 15 V (TA = 25 °C), while its ±26.9 V clamping voltage limits protected circuit stress during 18.6 A peak surge events - critical for safeguarding I/O ports, sensor interfaces, and DC input rails against ESD and lightning-induced transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 15.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC working margin. |
| Breakdown Voltage (VBR) | 16.7–20.4 V at 1.0 mA test current - Ensures reliable turn-on within defined tolerance band under transient stress. |
| Clamping Voltage (VC) | 26.9 V at 18.6 A (10/1000 µs) - Limits voltage seen by downstream ICs during worst-case surge, preserving MOSFET gate oxide integrity. |
| Peak Pulse Power (PPPM) | 500 W - Sustains single high-energy transients per JEDEC standard; derates linearly above 25 °C ambient. |
| Response Time | 5.0 ns (bidirectional) - Enables protection of high-speed digital interfaces (e.g., RS-485, CAN) before transient energy couples into logic. |
| Operating Temperature | –55 °C to +175 °C - Supports deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| Reverse Leakage (ID) | ≤1.0 µA at 15 V - Minimizes standby power loss and avoids false triggering in low-current sensor circuits. |
Pinout & Package
Package: JEDEC DO-204AC (Axial leaded, molded plastic body). Terminals are solder-plated axial leads compliant with MIL-STD-750 Method 2026. Polarity is non-applicable for bidirectional operation; no cathode band marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output - enables placement in series with any DC or AC line without orientation constraints. |
| Lead 1 / Lead 2 | Thermal and mechanical interface | 0.375" (9.5 mm) lead length supports 265 °C/10 s soldering; 5 lbs tensile strength ensures board retention during vibration. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable VBR drift under thermal cycling and humidity exposure. |
| UL 94V-0 flammability rating | Prevents flame propagation in enclosure-mounted applications where fire safety compliance is mandatory. |
| 500 W 10/1000 µs surge capability | Meets IEC 61000-4-5 Level 4 (4 kV) surge immunity requirements for industrial control systems. |
| Low incremental clamping resistance | Minimizes voltage overshoot during fast-rising transients (<100 ns rise time), improving protection margin for CMOS inputs. |
| High-temperature soldering guarantee | Validated for reflow and hand-soldering processes without parametric shift or bond-wire damage. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) I/O |
|---|---|
Use Scenario: 24 V DC power rail in programmable logic controllers exposed to load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of DC-DC converters and microcontroller power domains. Use Value: Limits transient voltage to ≤26.9 V during 18.6 A surges, preventing latch-up and permanent damage to 3.3 V/5 V logic supply ICs. |
Use Scenario: LIN bus and sensor analog inputs in BCMs subjected to ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bidirectional signal lines with no polarity sensitivity. Use Value: Responds within 5 ns to suppress >100 V spikes to safe levels, maintaining signal integrity and avoiding ADC saturation or reset events. |
| RS-485 Communication Port Protection | Smart Meter DC Charging Interface |
Use Scenario: Half-duplex RS-485 transceivers in utility metering networks facing EFT and surge coupling from nearby switching events. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS pair protecting differential A/B pins and common-mode reference. Use Value: Clamps common-mode transients to ≤26.9 V while preserving differential signaling margin due to matched bidirectional VC. |
Use Scenario: 12–48 V DC input stage of smart electricity meters connected to external charging sources with poor grounding. IC Role / Device Role / Timing Role: First-stage surge limiter before input filtering and primary-side controller ICs. Use Value: Absorbs 500 W surges without degradation, enabling compliance with ANSI C12.1 and IEC 62053-21 surge immunity standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | DO-214AA (SMB) surface-mount package; same 15 V VWM, 24.4 V VC at 20.5 A; lower thermal mass. | Preferred for automated SMT assembly and space-constrained PCBs; less suitable for through-hole prototyping or high-vibration environments. | Select SMBJ15CA when board area is limited and reflow compatibility is required; verify pad thermal relief for 75 °C ambient derating. |
| P6KE15CA | DO-204AL (DO-15) axial package; identical VWM/VC specs but rated for 600 W peak pulse power; larger body and higher IPPM (23.3 A). | Better suited for legacy designs requiring higher surge margin or where existing footprint accommodates longer leads. | Choose P6KE15CA if system-level testing reveals marginal margin with SA15CA/54's 500 W rating, especially in high-repetition surge scenarios. |
Compared with SMBJ15CA and P6KE15CA, the SA15CA/54 offers optimal balance of axial-mount ruggedness, UL 94V-0 compliance, and precise 500 W surge handling - making it ideal for industrial field devices where mechanical reliability and flame resistance outweigh ultra-compact packaging needs.
Availability
SA15CA/54 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and smart infrastructure projects requiring stable component supply, long-lifecycle support, and traceable sourcing for safety-critical overvoltage protection.
Supply support for SA15CA/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
Littelfuse is a global leader in circuit protection, specializing in fuses, TVS diodes, and surge suppression solutions for automotive, industrial, and consumer markets.
The SAxxCA series is part of Littelfuse's TransZorb™ TVS family, engineered specifically for cost-effective, high-reliability transient suppression in commercial and industrial DC power and signal lines.
FAQ
What is the clamping voltage of the SA15CA/54 under a 10/1000 µs surge?
The SA15CA/54 clamps to a maximum of 26.9 V at 18.6 A peak pulse current with a 10/1000 µs waveform. This value is measured per JEDEC standards and reflects the actual voltage imposed on protected circuitry during worst-case transient events - a critical parameter for verifying compatibility with downstream IC voltage tolerances in the SA15CA/54 application context.
Is the SA15CA/54 unidirectional or bidirectional?
The SA15CA/54 is a bidirectional TVS diode, indicated by the "CA" suffix per Littelfuse nomenclature. It provides symmetrical clamping in both polarities, eliminating the need for orientation during board placement and enabling use in AC-coupled or floating signal paths - a key distinction from unidirectional variants like SA15A, which require correct anode/cathode alignment in the SA15CA/54 design implementation.
What package type does the SA15CA/54 use?
The SA15CA/54 uses the JEDEC DO-204AC axial package - a molded plastic body with solder-plated axial leads, 0.375" (9.5 mm) lead length, and UL 94V-0 flammability rating. This package supports high-reliability through-hole mounting and withstands 265 °C/10 s soldering, distinguishing it from surface-mount alternatives such as SMBJ15CA in the SA15CA/54 product family.
Does the SA15CA/54 meet automotive surge immunity standards?
Yes, the SA15CA/54 meets key automotive transient immunity requirements including ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 5a (alternator load dump), thanks to its 500 W peak pulse power rating, 5 ns response time, and –55 °C to +175 °C operating range. When applied per recommended layout guidelines, the SA15CA/54 delivers validated protection for BCM, infotainment, and body electronics subsystems.
How does the SA15CA/54 compare to the SA15A variant?
The SA15CA/54 is bidirectional with symmetrical clamping, while the SA15A is unidirectional and requires correct polarity placement. The SA15CA/54 has identical VWM (15 V) and VBR range (16.7–20.4 V) but exhibits 5 ns response versus <1 ps for SA15A. For AC or floating lines - such as RS-485 or LIN bus - the SA15CA/54 eliminates orientation risk and simplifies layout, whereas SA15A suits DC-only paths where polarity is fixed and sub-picosecond response is essential.
SA15CA/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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 20.5A
- 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)
SA15CA/54 FAQ
1.How can I place an order for SA15CA/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15CA/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 SA15CA/54 reliable?
The price and inventory of SA15CA/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15CA/54 is usually 5 days.
3.What payment methods are accepted for SA15CA/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15CA/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15CA/54?
SA15CA/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15CA/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 SA15CA/54?
For technical support, including SA15CA/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15CA/54 requirements.
6.How does Aetrix verify that SA15CA/54 is sourced from the original manufacturer or authorized distributors?
All SA15CA/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 SA15CA/54 meets industry standards.
7.What is the process for return or replacement of SA15CA/54?
All SA15CA/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA15CA/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 SA15CA/54 part is unused and in its original packaging.
Return procedure for SA15CA/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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