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Taiwan Semiconductor Corporation SA54CA
- Part No.:
- SA54CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA54CA.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,569
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Product details
Overview
SA54CA from Taiwan Semiconductor is a bidirectional 54 V working stand-off transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500 W peak pulse power at 10/1000 μs, with 60.0–73.3 V breakdown voltage (VBR), 86.3 V clamping voltage (VC) at 5.4 A peak pulse current, and <1 μA reverse leakage at 54 V - deployed for ESD and EFT protection of automotive lighting control modules.
For engineers reviewing the SA54CA datasheet, SA54CA pinout, SA54CA application, or SA54CA equivalent, this page delivers verified electrical parameters, bidirectional TVS behavior, DO-15 terminal polarity marking, AEC-Q101 qualification status, and direct alternatives for 54 V rail protection in automotive and industrial systems.
Technical Context
The SA54CA is a silicon avalanche diode designed for bidirectional transient suppression, meeting IEC 61000-4-2 (±30 kV contact), IEC 61000-4-4 (±4 kV EFT), and ISO 7637-2 Pulse 1/2a/3a/3b immunity requirements. Its symmetrical VBR (60.0–73.3 V) and matched clamping in both polarities enable single-device protection of AC-coupled or floating signal lines.
It operates across –55 °C to +175 °C junction temperature, with 71 mV/°C VBR temperature coefficient and 0.400 g mass. The device uses pure tin-plated leads compliant with J-STD-002 and passes JESD 201 Class 2 whisker testing - confirming suitability for high-reliability automotive PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - maximum continuous DC or RMS voltage the device blocks without conduction; defines safe operating margin below clamping threshold. |
| VBR @ IT=1 mA | 60.0–73.3 V - breakdown voltage range at 1 mA test current; ensures reliable turn-on during transients while avoiding false triggering. |
| VC @ IPPM=5.4 A | 86.3 V - clamping voltage under 10/1000 μs surge; limits downstream IC stress to ≤86.3 V during 500 W transient events. |
| PPK | 500 W - peak pulse power rating per 10/1000 μs waveform; supports robust protection against load dump and inductive switching spikes. |
| IR @ VWM | <1 μA - reverse leakage at 54 V; minimizes standby power loss and avoids interference in high-impedance sensing circuits. |
| TJMAX | +175 °C - maximum junction temperature; enables operation in under-hood automotive environments without derating. |
| Package | DO-204AC (DO-15) - axial-leaded through-hole package with cathode band marking; compatible with legacy wave-solder and hand-solder processes. |
Pinout & Package
SA54CA is a two-terminal bidirectional TVS diode in DO-204AC (DO-15) package. Polarity is non-directional: terminals are interchangeable, with no anode/cathode distinction. The molded case features a cathode band only on unidirectional variants (e.g., SA54A); SA54CA omits this marking per design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode or Cathode (bidirectional) | Either lead connects to protected line; symmetric conduction allows placement without orientation constraints. |
| Terminal 2 | Anode or Cathode (bidirectional) | Paired terminal forms low-impedance shunt path during overvoltage; no PCB layout polarity dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for dual-diode configurations in AC or differential signal protection. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - required for powertrain and body electronics. |
| Fast response time | <5 ns response from 0 V to VBR - intercepts sub-microsecond ESD events before sensitive ICs experience overstress. |
| Low clamping ratio | VC/VWM = 1.60 - tight voltage margin between standoff and clamping ensures minimal overvoltage exposure to protected circuitry. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - meets environmental compliance for global automotive OEM supply chains. |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers in headlamp modules subjected to ISO 7637-2 Pulse 2a (inductive switch-off) and load dump. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power input rails to clamp transients before they reach DC-DC controllers and current-sense amplifiers. Use Value: Limits voltage excursion to ≤86.3 V during 500 W surges, preventing latch-up or gate oxide rupture in 60 V-rated power semiconductors. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to field-wiring EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Shunt protector mounted at connector entry point to divert fast-rising ±4 kV EFT pulses away from optocoupler inputs and microcontroller GPIOs. Use Value: Sub-5 ns response ensures clamping activation prior to 5 ns rise-time EFT edges, maintaining signal integrity and preventing false triggering. |
| Automotive Body Control Module | Smart Sensor Interface Protection |
|
Use Scenario: Securing LIN bus transceivers and window motor drivers against battery reverse connection and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS installed across VBAT and GND to absorb reverse-polarity energy and clamp positive spikes up to 500 W. Use Value: Withstands 70 A non-repetitive forward surge (IFSM) and maintains ≤1 μA leakage at 54 V, enabling low-power always-on monitoring. |
Use Scenario: Shielding analog front-end circuits of automotive pressure or position sensors connected to 12 V supply rails. IC Role / Device Role / Timing Role: Standoff protector placed upstream of LDO regulators to prevent transient-induced dropout or regulator latch-up. Use Value: 54 V VWM provides 10 % margin above nominal 48 V supply (2×12 V), while 86.3 V VC stays within absolute max ratings of 100 V op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ54CA | Same DO-214AC package, identical 54 V VWM, but 87.1 V VC at 5.4 A and 1.5 μA IR; slightly higher clamping and leakage. | Approved for UL 497B telecom surge protection; less common in automotive AEC-Q101 programs than SA54CA. | Select SMAJ54CA if UL certification is mandatory and AEC-Q101 is not required; verify thermal derating on small PCB pads. |
| ON Semiconductor 1.5KE54CA | Higher PPK (1500 W), larger DO-201AD package (7.1 × 4.5 mm vs. DO-15's 4.2 × 2.2 mm), 88.0 V VC at 17.0 A; physically incompatible footprint. | Targeted at industrial power supply primary-side surge suppression; unsuitable for space-constrained automotive modules. | Choose 1.5KE54CA only when board area permits larger package and system requires >500 W surge handling; not a drop-in replacement. |
Compared with SMAJ54CA and 1.5KE54CA, SA54CA offers optimal balance of AEC-Q101 qualification, DO-15 footprint compatibility, 86.3 V clamping, and <1 μA leakage - making it the preferred choice for volume automotive electronics where size, reliability, and precise voltage margins are critical.
Availability
SA54CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, and body control module designs requiring stable component supply, AEC-Q101 compliance, and DO-15 through-hole manufacturability.
Supply support for SA54CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 validation capabilities.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing bidirectional symmetry, high-temperature operation (up to +175 °C), and robust surge handling in compact DO-15 packaging - targeting cost-sensitive yet reliability-critical applications.
FAQ
What is the breakdown voltage range of SA54CA?
The SA54CA has a minimum breakdown voltage (VBR) of 60.0 V and a maximum of 73.3 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures consistent turn-on behavior across production lots while accommodating process variation - critical for predictable clamping in automotive safety systems where SA54CA is deployed.
Is SA54CA unidirectional or bidirectional?
SA54CA is a bidirectional TVS diode, meaning it provides symmetrical clamping in both polarities. Unlike unidirectional variants (e.g., SA54A), SA54CA has no cathode band marking and exhibits identical VBR and VC characteristics whether voltage is applied in either direction - confirmed in TSC's SA Series datasheet Version L2105, Table on Page 3.
Does SA54CA meet AEC-Q101 qualification?
Yes, SA54CA is AEC-Q101 qualified, as explicitly stated in the "FEATURES" section of the official Taiwan Semiconductor SA Series datasheet (Version L2105). This qualification covers stress tests including HTGB, H3TRB, TC, and ESD - validating SA54CA for use in automotive powertrain, chassis, and body electronics where reliability is mandated.
What is the clamping voltage of SA54CA at its rated peak pulse current?
The SA54CA clamps to a maximum of 86.3 V at 5.4 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is specified in the "MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS" table for SA54CA on Page 3 of the SA Series datasheet and directly determines the maximum overvoltage stress imposed on downstream components during surge events.
What package does SA54CA use, and are its leads lead-free?
SA54CA uses the DO-204AC (DO-15) axial-leaded package with pure tin-plated leads compliant with J-STD-002 solderability standards and RoHS Directive 2011/65/EU. The lead finish is lead-free, halogen-free per IEC 61249-2-21, and passes JESD 201 Class 2 whisker testing - ensuring compatibility with modern automotive PCB assembly processes.
SA54CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 6A
- 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)
SA54CA FAQ
1.How can I place an order for SA54CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA54CA 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 SA54CA reliable?
The price and inventory of SA54CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA54CA is usually 5 days.
3.What payment methods are accepted for SA54CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA54CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA54CA?
SA54CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA54CA 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 SA54CA?
For technical support, including SA54CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA54CA requirements.
6.How does Aetrix verify that SA54CA is sourced from the original manufacturer or authorized distributors?
All SA54CA 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 SA54CA meets industry standards.
7.What is the process for return or replacement of SA54CA?
All SA54CA units undergo pre-shipment inspection (PSI). If there is an issue with SA54CA, 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 SA54CA part is unused and in its original packaging.
Return procedure for SA54CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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