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Taiwan Semiconductor Corporation SA54H
- Part No.:
- SA54H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA54H.pdf
- Description:
- 500W, 66.7V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,914
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Product details
Overview
SA54H from Taiwan Semiconductor is a unidirectional 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 at 1 mA test current and 86.3 V maximum clamping voltage at 5.4 A peak pulse current; used for automotive ESD and load-dump protection in power supply rails.
For engineers reviewing the SA54H datasheet, SA54H pinout, SA54H application, or SA54H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under surge conditions, thermal derating behavior, and direct alternatives for circuit protection design.
Technical Context
The SA54H operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 60.0–73.3 V breakdown range, clamping transients to ≤86.3 V at 5.4 A. Its low leakage (<1 μA at 54 V) ensures minimal standby power loss in always-on systems.
Designed per ANSI/IEEE C62.35, it sustains 500 W non-repetitive surges per 10/1000 μs waveform, with junction temperature rated from –55 °C to +175 °C and thermal derating above 25 °C per Fig.2. The DO-204AC package supports lead-free soldering and meets UL 94V-0 flammability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 60.0 / 73.3 V - Breakdown voltage range at 1 mA; defines turn-on threshold tolerance |
| VC @ IPPM | 86.3 V - Clamped voltage at 5.4 A peak pulse; determines protected circuit's max overvoltage stress |
| PPK | 500 W - Peak pulse power handling at 10/1000 μs; validates robustness against ISO 7637-2 Pulse 1/2/5a |
| IR @ VWM | <1 μA - Reverse leakage at 54 V; ensures negligible quiescent current in battery-backed systems |
| TJ max | +175 °C - Maximum junction temperature; enables use in under-hood automotive environments |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with 0.400 g mass and tin-plated leads |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, epoxy-molded, cathode band marked on one end. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| 500 W surge rating | Withstands ISO 7637-2 Load Dump (Pulse 5a) without degradation |
| Fast response time | <1.0 ps from 0 V to VBR - limits voltage overshoot during nanosecond-scale ESD events |
| Low clamping ratio | VC/VBR ≈ 1.18 - tight voltage margin between breakdown and clamping improves system margin |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 54 V. Use Value: Limits rail voltage to ≤86.3 V during 500 W transients, preventing damage to MCU, CAN transceivers, and voltage regulators. | Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) connected to microcontrollers in factory automation equipment. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb EFT bursts and cable discharge events. Use Value: Sub-μA leakage preserves signal integrity; fast <1 ps response prevents latch-up in precision ADC front-ends. |
| LED Lighting Driver Protection | DC-DC Converter Input Stage |
Use Scenario: Shielding constant-current LED drivers from inductive switching spikes generated by relay or MOSFET control circuits. IC Role / Device Role / Timing Role: Unidirectional SA54H placed across driver input terminals to clamp reverse polarity and flyback energy. Use Value: Withstands 70 A IFSM surge, enabling reliable operation in high-current lighting systems with mechanical switching. | Use Scenario: Guarding buck converter input against voltage reversals and line transients in telecom power supplies. IC Role / Device Role / Timing Role: TVS located upstream of input filter capacitor to divert surge energy before reaching controller IC. Use Value: 175 °C TJ max allows placement near hot components; DO-15 footprint simplifies layout in space-constrained PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A | Same 54 V VWM, but SMA package (surface-mount); 600 W PPK; slightly higher VC (87.1 V) | Requires SMT reflow process; better for automated assembly; lower profile than DO-15 | Select SMAJ54A when board space is constrained and reflow capability exists. |
| P6KE56A | 56 V VWM, DO-15 package, 600 W PPK, VC = 87.1 V; not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial only | Choose P6KE56A for cost-sensitive non-automotive designs where AEC-Q101 is not required. |
Compared with SMAJ54A and P6KE56A, the SA54H uniquely combines AEC-Q101 qualification, DO-15 through-hole compatibility, and precise 54 V stand-off in a single device-making it optimal for automotive replacement parts and legacy through-hole designs requiring certified reliability.
Availability
SA54H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and LED driver surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SA54H 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 for automotive, industrial, and consumer markets.
The SA Series was developed specifically for high-reliability transient suppression in harsh environments, emphasizing AEC-Q101 compliance, tight parameter distributions, and robust surge endurance in axial-leaded packages.
FAQ
What is the AEC-Q101 qualification status of SA54H?
The SA54H is explicitly AEC-Q101 qualified, as confirmed in the SA Series datasheet Version L2105, Section 1. This qualification covers temperature cycling, humidity bias, mechanical shock, and surge testing per automotive standards-making SA54H suitable for under-hood and body-control module applications where reliability is critical. Aetrix Electronics provides full traceability documentation for SA54H's AEC-Q101 certification upon request.
Does SA54H support bidirectional transient suppression?
No, SA54H is a unidirectional TVS diode, indicated by the absence of "CA" or "C" suffix and its single cathode band marking. It protects against reverse-polarity transients and positive surges on grounded-line configurations only. For bidirectional protection at 54 V, SA54CA would be required-but that part is not offered in H-grade (AEC-Q101) per the ordering table. SA54H must be oriented with cathode toward the protected line.
What is the maximum clamping voltage of SA54H under standard test conditions?
The maximum clamping voltage (VC) of SA54H is 86.3 V at 5.4 A peak pulse current (IPPM), measured using the 10/1000 μs waveform per ANSI/IEEE C62.35. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on downstream circuitry during surge events-critical for ensuring compatibility with 60 V-rated ICs and capacitors.
Can SA54H replace P6KE54A in existing designs?
SA54H can functionally replace P6KE54A in most through-hole layouts due to identical DO-204AC (DO-15) package, matching VWM (54 V), and comparable clamping (86.3 V vs. 84.5 V). However, SA54H offers AEC-Q101 qualification and tighter VBR tolerance (60.0–73.3 V vs. 57.8–66.2 V), making it preferable for automotive upgrades. No PCB changes are needed, but validation per ISO 16750-2 is recommended.
What is the thermal derating behavior of SA54H above 25°C ambient?
SA54H follows the pulse derating curve in Fig.2 of the datasheet: peak pulse power decreases linearly from 500 W at 25°C to ~250 W at 100°C ambient. At 125°C, derated PPK drops to approximately 125 W. This behavior is critical for under-hood deployments-designers must ensure board-level thermal management maintains case temperature below 100°C to preserve full surge capability.
SA54H 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 86.3V
- Current - Peak Pulse (10/1000µs):
- 5.4A
- 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)
SA54H FAQ
1.How can I place an order for SA54H through Aetrix?
Please submit a Request for Quotation (RFQ) for SA54H 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 SA54H reliable?
The price and inventory of SA54H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA54H is usually 5 days.
3.What payment methods are accepted for SA54H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA54H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA54H?
SA54H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA54H 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 SA54H?
For technical support, including SA54H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA54H requirements.
6.How does Aetrix verify that SA54H is sourced from the original manufacturer or authorized distributors?
All SA54H 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 SA54H meets industry standards.
7.What is the process for return or replacement of SA54H?
All SA54H units undergo pre-shipment inspection (PSI). If there is an issue with SA54H, 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 SA54H part is unused and in its original packaging.
Return procedure for SA54H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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