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onsemi SA58CA
- Part No.:
- SA58CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA58CA.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:9,585
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Product details
Overview
SA58CA from Fairchild Semiconductor is a bidirectional 500 W transient voltage suppressor (TVS) diode in DO-15 package, designed for clamping ESD and surge transients in power and signal lines. It features a 58 V reverse stand-off voltage (VRWM), 64.4–71.2 V breakdown voltage (VBR), 93.6 V clamping voltage (VC) at 5.3 A peak pulse current, and operates up to +175 °C junction temperature.
For engineers reviewing the SA58CA datasheet, pinout, applications, or equivalent options, this device serves as a robust overvoltage protection component in DC power rails, industrial I/O interfaces, and telecom line cards where fast response (<5 ns), low leakage (<1 µA at 58 V), and high surge capability are required.
Technical Context
The SA58CA is a glass-passivated, bipolar junction TVS diode optimized for unidirectional and bidirectional transient suppression on 10/1000 µs waveforms. Its clamping performance is specified at 5.3 A IPPM with VC = 93.6 V, and it maintains <1 µA reverse leakage above VRWM.
Designed for DO-15 axial-leaded mounting, the SA58CA exhibits low incremental surge resistance and sub-5 ns response time from 0 V to VBR in bidirectional mode. It supports non-repetitive surge currents up to 70 A (IFSM) and is rated for continuous power dissipation of 1.0 W at 75 °C ambient with 0.375" lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 500 W - sustains high-energy surges without failure in lightning or EFT events |
| Reverse Stand-off Voltage (VRWM) | 58 V - maximum continuous operating voltage before clamping begins |
| Breakdown Voltage (VBR) | 64.4–71.2 V @ 1.0 mA - ensures reliable turn-on within defined tolerance band |
| Clamping Voltage (VC) | 93.6 V @ 5.3 A - limits downstream circuit voltage during surge to safe level |
| Peak Pulse Current (IPPM) | 5.3 A - maximum transient current the device safely clamps per waveform |
| Reverse Leakage (IR) | <1 µA @ 58 V - minimizes standby power loss and avoids false triggering |
| Junction Temperature Range | +175 °C max - enables use in high-temperature industrial and automotive under-hood environments |
Pinout & Package
DO-15 axial-leaded package with no cathode band (bidirectional configuration). Leads are tinned copper, suitable for wave or hand soldering. Standard lead spacing: 0.400" (10.16 mm), body diameter: 2.7 mm, overall length: 5.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Functions identically as cathode under reverse polarity; symmetric conduction path |
| Cathode | Transient current entry point (bidirectional) | No polarity marking; terminals interchangeable for AC or dual-rail protection |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances moisture resistance and long-term reliability in humid or contaminated environments |
| Fast response time | <5 ns turn-on in bidirectional mode - protects sensitive ICs before transient energy propagates |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 22.4 V) and reduced voltage overshoot during surge |
| High-temperature operation | Junction rating up to +175 °C - supports placement near heat sources in power supplies and motor drives |
| JEDEC-compliant surge rating | 70 A non-repetitive forward surge (IFSM) - withstands inrush and fault currents without degradation |
Applications
| Industrial PLC I/O Protection | DC Power Rail Surge Suppression |
|---|---|
Use Scenario: Protecting 48 V DC input terminals of programmable logic controllers against induced surges from relay switching or nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed across input rail and ground to clamp transients before they reach input conditioning circuitry. Use Value: Clamps 500 W surges at 93.6 V while maintaining <1 µA leakage, preserving system efficiency and enabling compliance with IEC 61000-4-5 Level 3 (2 kV) |
Use Scenario: Safeguarding 48 V backplane power distribution in telecom equipment exposed to hot-swap and load-dump events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC bus, coordinated with upstream fusing and downstream DC-DC converters. Use Value: Limits transient voltage to 93.6 V within 5 ns, preventing latch-up or damage to 60 V-rated MOSFETs and controllers on the same rail |
| Automotive Body Control Module Inputs | RS-485 Data Line Transient Protection |
Use Scenario: Protecting LIN or CAN node inputs in body control modules subjected to ISO 7637-2 pulse 1 and pulse 2a transients. IC Role / Device Role / Timing Role: Secondary-level TVS on sensor or switch inputs, mounted close to connector entry points. Use Value: Withstands 500 W pulses at 10/1000 µs while operating up to +175 °C junction temperature-meets AEC-Q101 stress requirements |
Use Scenario: Shielding half-duplex RS-485 transceivers in factory automation networks from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional TVS placed differentially across A/B lines and common-mode to ground. Use Value: Symmetric clamping ensures balanced line integrity; low capacitance (~100 pF typical) preserves signal rise time up to 10 Mbps |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA (onsemi) | Same VRWM (58 V), higher IPPM (6.5 A), lower VC (93.6 V → 93.6 V same), SMB package (surface-mount) | Requires PCB rework for SMT vs. through-hole; better thermal cycling performance but lower surge margin in leaded assembly | Select when board space is constrained and automated assembly is used; verify pad thermal relief for 500 W pulse handling |
| P6SMB58CA (Littelfuse) | Identical electrical specs (VRWM = 58 V, VC = 93.6 V, IPPM = 5.3 A), same DO-15 package, AEC-Q101 qualified | Qualified for automotive use; identical pinout and footprint - direct drop-in replacement where qualification is mandatory | Choose for automotive-grade designs requiring documented AEC-Q101 compliance and full traceability |
Compared with SMBJ58CA and P6SMB58CA, the SA58CA offers identical clamping performance in a legacy DO-15 through-hole package, making it ideal for industrial retrofits and high-reliability through-hole assemblies where AEC-Q101 is not required but JEDEC surge robustness is critical.
Availability
SA58CA is available at Aetrix Electronics and suitable for industrial PLC I/O protection, DC power rail surge suppression, and RS-485 data line transient protection requiring stable component supply and long-lifecycle support.
Supply support for SA58CA 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
Fairchild Semiconductor was a leading designer and manufacturer of power semiconductors, analog ICs, and discrete components, acquired by ON Semiconductor in 2016. Its legacy TVS portfolio remains widely deployed in industrial and automotive systems.
The SA58CA belongs to Fairchild's SAxxCA series of 500 W bidirectional TVS diodes, engineered specifically for high-energy transient suppression in harsh-environment power and interface circuits where reliability and repeatable clamping are essential.
FAQ
What is the clamping voltage of the SA58CA at its rated peak pulse current?
The SA58CA has a maximum clamping voltage (VC) of 93.6 V when subjected to its rated peak pulse current of 5.3 A on a 10/1000 µs waveform. This value is measured per industry-standard test conditions and ensures predictable overvoltage limiting for downstream circuitry. The SA58CA maintains this clamping performance across its full operating temperature range up to +175 °C junction temperature.
Is the SA58CA unidirectional or bidirectional, and how is polarity indicated?
The SA58CA is a bidirectional transient voltage suppressor, as indicated by the "CA" suffix. Unlike unidirectional variants, it has no cathode band marking on the DO-15 package - both leads are functionally identical and provide symmetrical clamping in either polarity. This makes the SA58CA suitable for AC-coupled lines, differential buses like RS-485, or any application requiring protection regardless of voltage polarity.
What is the maximum continuous power dissipation rating for the SA58CA?
The SA58CA is rated for 1.0 W of steady-state power dissipation at an ambient temperature of 75 °C with 0.375" lead length, per JEDEC standards. Derating is required above 75 °C, following the published pulse derating curve. This rating applies only to continuous DC or low-frequency conditions-not to transient events, where the 500 W peak pulse rating governs.
Does the SA58CA meet any industry surge immunity standards out of the box?
The SA58CA's 500 W peak pulse rating on the 10/1000 µs waveform aligns with the energy levels defined in IEC 61000-4-5 for Level 3 (2 kV) surge testing in industrial environments. While the device itself is not certified to the standard, its clamping performance and surge capability enable compliant system-level design when properly implemented with appropriate layout and coordination with upstream impedance.
Can the SA58CA be used in automotive applications?
The SA58CA is not AEC-Q101 qualified, though it operates up to +175 °C junction temperature and withstands 70 A non-repetitive surge current. For automotive body electronics requiring formal qualification, the P6SMB58CA (Littelfuse) or SMAJ58CA (onsemi) are validated alternatives. The SA58CA remains suitable for non-safety-critical industrial or telecom applications where qualification is not mandated.
SA58CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
SA58CA FAQ
1.How can I place an order for SA58CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA58CA 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 SA58CA reliable?
The price and inventory of SA58CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA58CA is usually 5 days.
3.What payment methods are accepted for SA58CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA58CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA58CA?
SA58CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA58CA 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 SA58CA?
For technical support, including SA58CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA58CA requirements.
6.How does Aetrix verify that SA58CA is sourced from the original manufacturer or authorized distributors?
All SA58CA 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 SA58CA meets industry standards.
7.What is the process for return or replacement of SA58CA?
All SA58CA units undergo pre-shipment inspection (PSI). If there is an issue with SA58CA, 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 SA58CA part is unused and in its original packaging.
Return procedure for SA58CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA58CA Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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