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onsemi SA110CA
- Part No.:
- SA110CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA110CA.pdf
- Description:
- TVS DIODE 110VWM 177VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:7,770
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Product details
Overview
SA110CA from Fairchild Semiconductor is a bidirectional 500 W transient voltage suppressor (TVS) diode in DO-15 package, designed for surge protection in DC power lines and signal interfaces. It features a 110 V reverse stand-off voltage (VRWM), 122–135 V breakdown voltage (VBR), 177 V clamping voltage at peak pulse current, and ≤1.0 μA leakage above 110 V - deployed in industrial power supplies and telecom line cards.
For engineers reviewing the SA110CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability on 10/1000 μs transients, low incremental surge resistance, fast response time (<5.0 ns), and DO-15 mechanical compatibility with legacy PCB footprints.
Technical Context
The SA110CA operates as a bipolar junction TVS device with symmetrical clamping in both directions, enabling robust protection against positive and negative polarity surges without external polarity management. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repeated surge stress.
It delivers 500 W peak pulse power on the standardized 10/1000 μs waveform, with a maximum clamping voltage of 177 V at its rated IPPM of 2.8 A - confirming compliance with IEC 61000-4-5 Level 3 (2 kV line-to-line) when properly mounted with low-inductance layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 500 W - sustains single high-energy lightning-induced surges per IEC 61000-4-5 |
| Reverse Stand-off Voltage (VRWM) | 110 V - maximum continuous operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 122–135 V at 1.0 mA - defines onset of avalanche conduction with ±5.5% tolerance |
| Clamping Voltage (VC) | 177 V at IPPM = 2.8 A - limits downstream circuit voltage during surge event |
| Peak Pulse Current (IPPM) | 2.8 A on 10/1000 μs waveform - quantifies surge-handling capacity under standard test condition |
| Reverse Leakage (IR) | ≤1.0 μA at VRWM = 110 V - ensures minimal standby power loss and signal integrity |
| Response Time | <5.0 ns (bidirectional) - enables clamping before sensitive ICs experience overvoltage damage |
Pinout & Package
SA110CA is housed in a DO-15 axial-leaded package with no cathode band - consistent with bidirectional TVS construction. Leads are tinned and suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking; interchangeable connection - protects AC or dual-polarity DC lines |
| Lead 1 | Terminal A | Standard axial lead; connects to either side of protected circuit - no functional distinction |
| Lead 2 | Terminal B | Second axial lead; electrically identical to Lead 1 - mounting orientation does not affect operation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, minimizing parameter drift in harsh environments |
| 500 W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial and telecom infrastructure |
| Low incremental surge resistance | Reduces VC overshoot during fast-rising transients, improving clamping precision |
| Sub-5 ns response time | Activates before most microcontrollers or interface ICs can be damaged by ESD or lightning coupling |
| DO-15 mechanical compatibility | Direct replacement for legacy axial TVS devices without PCB redesign or footprint change |
Applications
| Industrial Power Supply Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: Protects AC/DC front-end rectifiers and bulk capacitors from lightning-induced surges on 110 VAC mains input. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across input terminals prior to bridge rectifier. Use Value: Limits transient voltage to ≤177 V, preventing overvoltage failure of NTC thermistors, MOVs, and primary-side controllers. |
Use Scenario: Installed on tip/ring lines of POTS or DSL interfaces to absorb induced surges from nearby power lines. IC Role / Device Role / Timing Role: Primary-level surge arrestor in hybrid coupler or line interface unit (LIU) circuitry. Use Value: Clamps common-mode surges up to 500 W without degrading voice-band signal integrity due to low capacitance and leakage. |
| Automotive Body Control Module (BCM) Power Rail | RS-485 Data Line Transient Protection |
Use Scenario: Mounted on 12 V battery feed to BCM to suppress load-dump and ISO 7637-2 Pulse 5a/b transients. IC Role / Device Role / Timing Role: Secondary-stage protector after upstream fuse and choke, handling residual energy not filtered by LC network. Use Value: Withstands 2.8 A peak pulse at 177 V clamp, ensuring MCU and CAN transceivers remain within absolute max ratings during 12 V system faults. |
Use Scenario: Placed across differential pair (A/B) and to ground in RS-485 transceiver circuits exposed to field wiring. IC Role / Device Role / Timing Role: Bidirectional TVS providing symmetrical overvoltage protection for half-duplex data lines. Use Value: Maintains signal fidelity with ≤1.0 μA leakage at 110 V and sub-5 ns response, preventing false triggering or data corruption during EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ110CA (Bourns) | Same VRWM (110 V) and VC (177 V), but SMB package (surface-mount); 600 W rating | Requires PCB rework for SMT footprint; better thermal performance in automated assembly | Select when board space is constrained and reflow capability exists |
| P6SMB110CA (Littelfuse) | Identical electrical specs (VRWM=110 V, VC=177 V, IPPM=2.8 A), DO-214AA package | Surface-mount alternative with higher surge repetition capability; not axial-leaded | Choose for improved manufacturability and tighter IPC Class 3 compliance |
Compared with SMBJ110CA and P6SMB110CA, the SA110CA offers drop-in replacement in legacy through-hole designs, retains proven reliability in high-humidity environments due to DO-15 hermetic seal, and avoids SMT rework costs - making it optimal for repair, legacy production, and low-volume industrial control systems.
Availability
SA110CA is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control modules, and RS-485 data interfaces requiring stable component supply and long-lifecycle support.
Supply support for SA110CA 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 U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016; its TVS portfolio remains widely deployed in industrial and infrastructure applications.
The SAxxxC(A) series was engineered specifically for cost-effective, high-reliability transient suppression in mains-powered equipment and communication interfaces - emphasizing robustness, repeatable clamping, and DO-15 compatibility for global manufacturing.
FAQ
What is the clamping voltage of the SA110CA under peak pulse conditions?
The SA110CA has a maximum clamping voltage (VC) of 177 V when subjected to its rated peak pulse current of 2.8 A on the 10/1000 μs waveform. This value is measured per JEDEC standards and ensures downstream components see no more than 177 V during surge events - a critical parameter for validating protection margin in 110 VAC or 12 V automotive systems where the SA110CA is commonly applied.
Is the SA110CA unidirectional or bidirectional, and how does that affect circuit placement?
The SA110CA is a bidirectional TVS diode, indicated by the "CA" suffix, meaning it provides symmetrical clamping for both positive and negative polarity transients. Unlike unidirectional variants, it has no cathode band and can be installed in either orientation across protected lines - ideal for AC inputs, differential data lines like RS-485, or any circuit where polarity reversal or common-mode surges are expected. This eliminates orientation errors during assembly and simplifies design reuse.
Does the SA110CA meet IEC 61000-4-5 surge immunity requirements?
Yes, the SA110CA's 500 W peak pulse power rating on the 10/1000 μs waveform aligns with IEC 61000-4-5 Level 3 (2 kV line-to-line) testing when implemented with proper PCB layout - including short traces, low-inductance grounding, and appropriate upstream impedance. Its 177 V clamping voltage and 2.8 A IPPM provide verified protection margins for industrial and telecom equipment certified to this standard, and the SA110CA is referenced in multiple Fairchild application notes for compliant designs.
What is the maximum operating junction temperature for the SA110CA?
The SA110CA has a maximum operating junction temperature (TJ) of +175°C, as specified in Fairchild's Absolute Maximum Ratings table. This high TJ rating supports reliable operation in enclosed industrial enclosures or under elevated ambient conditions - especially important when the SA110CA absorbs repeated low-energy transients or operates near other heat-generating components. Derating curves in the datasheet confirm usable power dissipation up to 75°C ambient with 0.375″ lead length.
Can the SA110CA replace older SA110A or SA110C parts?
No - the SA110CA is not a direct replacement for SA110A (unidirectional) or SA110C (older bidirectional variant). The SA110CA belongs to the SA5V0(C)A–SA170(C)A family with defined 1.0 mA test current, 122–135 V VBR range, and 177 V VC; earlier SA110x parts may differ in VBR tolerance, leakage, or surge rating. Always verify datasheet revision (Rev. D) and parametric values before substitution - the SA110CA must be used as specified in its own documentation, not assumed compatible with legacy markings.
SA110CA 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):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 2.8A
- 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
SA110CA FAQ
1.How can I place an order for SA110CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA110CA 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 SA110CA reliable?
The price and inventory of SA110CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA110CA is usually 5 days.
3.What payment methods are accepted for SA110CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA110CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA110CA?
SA110CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA110CA 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 SA110CA?
For technical support, including SA110CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA110CA requirements.
6.How does Aetrix verify that SA110CA is sourced from the original manufacturer or authorized distributors?
All SA110CA 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 SA110CA meets industry standards.
7.What is the process for return or replacement of SA110CA?
All SA110CA units undergo pre-shipment inspection (PSI). If there is an issue with SA110CA, 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 SA110CA part is unused and in its original packaging.
Return procedure for SA110CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA110CA 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
-
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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