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Taiwan Semiconductor Corporation SA58
- Part No.:
- SA58
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA58.pdf
- Description:
- 500W, 71.6V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,553
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Product details
Overview
SA58 from Taiwan Semiconductor is a unidirectional 58 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 64.4–78.7 V breakdown voltage, 103 V clamping voltage at 5.0 A peak pulse current, and <1 μA reverse leakage above 10 V - used for automotive ESD and inductive load surge protection in power supply rails.
For engineers reviewing the SA58 datasheet, SA58 pinout, SA58 application, or SA58 equivalent, this page delivers verified electrical parameters, DO-15 terminal polarity mapping, AEC-Q101 qualification status, clamping performance under standardized surge waveforms, and direct alternative part comparisons for circuit protection design.
Technical Context
The SA58 operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 64.4–78.7 V breakdown range at 1 mA test current. Its low dynamic impedance enables rapid clamping to ≤103 V during 10/1000 μs transients, limiting energy dissipation in downstream ICs.
Designed for robustness in harsh environments, it supports −55 °C to +175 °C junction operation, meets JESD201 Class 2 whisker resistance, and features pure tin-plated leads compliant with J-STD-002 solderability standards - critical for automotive and industrial power rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 64.4 V / 78.7 V at 1 mA - ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 103 V at 5.0 A - clamping voltage limits protected circuit stress during 10/1000 μs surge |
| PPK | 500 W - peak pulse power handling per single non-repetitive 10/1000 μs waveform |
| IR @ VWM | <1 μA - minimal leakage preserves standby power integrity in always-on systems |
| TJ max | +175 °C - enables deployment in under-hood automotive or high-temperature industrial enclosures |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with cathode band marking |
Pinout & Package
DO-204AC (DO-15) package with axial leads; cathode indicated by molded band on body. Leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); conducts during overvoltage to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Fast response time | <1.0 ps from 0 V to VBR - ensures sub-nanosecond turn-on for ESD events |
| Low clamping ratio | VC/VBR ≈ 1.3–1.6 - tight voltage margin between breakdown and clamping improves system margin |
| Halogen-free construction | Complies with IEC 61249-2-21 - supports RoHS-compliant and environmentally regulated designs |
| High surge current capability | 5.0 A peak pulse current at 10/1000 μs - withstands repetitive load dump and inductive kick events |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 58 V. Use Value: Limits rail voltage to ≤103 V during ISO 7637-2 Pulse 5a events, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Safeguarding digital input modules against field-wiring induced transients in factory automation. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC sensor input lines to absorb fast EFT bursts per IEC 61000-4-4. Use Value: Maintains signal integrity by suppressing >1 kV/5 kHz EFT pulses without false triggering due to <1 μA leakage at 24 V. |
| LED Driver Overvoltage Clamp | Motor Control Board Surge Suppression |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to clamp inductive flyback and grid coupling spikes. Use Value: Clamps 500 W transients within 103 V, preserving LED string integrity and avoiding thermal runaway in high-power lighting systems. | Use Scenario: Shielding gate drivers and microcontrollers from back-EMF during brushed DC motor commutation. IC Role / Device Role / Timing Role: Mounted across motor terminals or near H-bridge outputs to divert inductive energy to ground. Use Value: Absorbs 70 A surge currents (IFSM) and clamps flyback voltages to safe levels, extending MOSFET lifetime and reducing system resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ58A | Same DO-214AC package; 58 V VWM, 64.4–71.2 V VBR, 103 V VC @ 4.9 A - nearly identical clamping but slightly lower IPPM | Identical use in 12 V/24 V rail protection; validated in AEC-Q101 automotive programs | Select SMAJ58A if DO-214AC SMT layout is preferred over axial DO-15; requires PCB rework |
| ON Semiconductor 1.5KE56A | Higher PPK (1500 W), larger DO-201AD package, 56 V VWM, 62.2–68.7 V VBR, 93.6 V VC @ 16.0 A - higher surge capacity but looser VWM/VBR ratio | Better suited for high-energy industrial surge zones (e.g., AC mains inputs), not optimized for compact automotive PCBs | Choose 1.5KE56A only when >1 kW surge immunity is required and board space allows larger case size |
Compared with SMAJ58A and 1.5KE56A, SA58 offers optimal balance of compact DO-15 form factor, precise 58 V standoff, and 103 V clamping for space-constrained automotive and industrial control boards where axial mounting and AEC-Q101 compliance are prioritized.
Availability
SA58 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting systems, and motor control circuits requiring stable component supply and long-term lifecycle support.
Supply support for SA58 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power management, protection devices, and automotive-qualified components.
The SA Series TVS diodes are engineered for high-reliability transient suppression in automotive, industrial, and consumer power systems - emphasizing low clamping voltage, AEC-Q101 qualification, and consistent DO-15 mechanical compatibility.
FAQ
What is the breakdown voltage range of SA58?
The SA58 has a minimum breakdown voltage (VBR) of 64.4 V and a maximum of 78.7 V, measured at 1 mA test current per ANSI/IEEE C62.35. This range ensures consistent turn-on behavior across production lots while accommodating process variation - critical for predictable clamping in safety-critical automotive applications where SA58 is deployed.
Is SA58 unidirectional or bidirectional?
SA58 is a unidirectional TVS diode, designed for DC rail protection with cathode band marking indicating the clamping terminal. It conducts only during reverse overvoltage events and blocks forward current up to 3.5 V at 35 A. Bidirectional variants (e.g., SA58CA) exist in the SA Series but are distinct orderable parts - SA58 itself is strictly unidirectional.
Does SA58 meet AEC-Q101 requirements?
Yes, SA58 is available in an AEC-Q101 qualified version denoted by the "H" suffix (e.g., SA58H). The base SA58 part is not automatically qualified; AEC-Q101 compliance applies only to parts ordered with the H suffix per TSC's ordering code table. This qualification covers stress tests including HTGB, HTRB, and temperature cycling - essential for under-hood automotive use of SA58H.
What is the clamping voltage of SA58 under standard surge conditions?
The SA58 clamps to a maximum of 103 V when subjected to a 10/1000 μs waveform at 5.0 A peak pulse current (IPPM), as specified in TSC's L2105 datasheet. This VC value defines the upper voltage limit imposed on protected circuitry during surge events - directly enabling system-level immunity validation against ISO 7637-2 and IEC 61000-4-5 standards when SA58 is correctly applied.
What package type does SA58 use and how is polarity marked?
SA58 uses the DO-204AC (DO-15) axial package with pure tin-plated leads. Polarity is marked by a cathode band on the body - the banded end connects to the protected line (e.g., 12 V rail), while the unbanded end connects to ground. This marking aligns with JEDEC standards and ensures correct orientation during manual or automated assembly of SA58 into power protection circuits.
SA58 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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 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)
SA58 FAQ
1.How can I place an order for SA58 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA58 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 SA58 reliable?
The price and inventory of SA58 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA58 is usually 5 days.
3.What payment methods are accepted for SA58?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA58 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA58?
SA58 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA58 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 SA58?
For technical support, including SA58 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA58 requirements.
6.How does Aetrix verify that SA58 is sourced from the original manufacturer or authorized distributors?
All SA58 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 SA58 meets industry standards.
7.What is the process for return or replacement of SA58?
All SA58 units undergo pre-shipment inspection (PSI). If there is an issue with SA58, 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 SA58 part is unused and in its original packaging.
Return procedure for SA58:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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