My Inquiry
My Account
onsemi SA11CA
- Part No.:
- SA11CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11CA.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:8,720
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA11CA from Fairchild Semiconductor is a bidirectional 500 W transient voltage suppressor (TVS) diode designed for surge protection in DC power lines and signal interfaces. It features a 11 V reverse stand-off voltage (VRWM), 12.2–13.5 V breakdown voltage (VBR), 18.2 V clamping voltage at peak pulse current, and operates with ≤1 µA leakage above 10 V. It is used in industrial power supplies to protect downstream regulators and microcontrollers from ESD and lightning-induced transients.
For engineers reviewing the SA11CA datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 10/1000 µs surges, bidirectional symmetry for AC-coupled or floating bus protection, junction temperature rating up to +175°C, and DO-15 package compatibility with high-reliability board-level surge suppression layouts.
Technical Context
The SA11CA employs a glass-passivated silicon junction optimized for fast response-less than 5.0 ns from 0 V to breakdown in bidirectional mode-and low incremental surge resistance to maintain stable clamping during multi-pulse events. Its unidirectional counterpart SA11A shares identical VBR and VC specs but lacks symmetrical conduction.
Rated for 500 W peak pulse power on the standard 10/1000 µs waveform and 70 A non-repetitive forward surge current (IFSM), the device sustains operation across –65°C to +175°C storage and junction temperature ranges, supporting deployment in harsh-environment automotive and industrial control systems without derating below +75°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 500 W on 10/1000 µs waveform - defines maximum single-event surge energy absorption capability |
| Clamping Voltage VC | 18.2 V at IPPM - ensures protected circuitry sees no more than 18.2 V during rated surge |
| Breakdown Voltage VBR | 12.2–13.5 V at 1.0 mA - establishes reliable turn-on threshold with tight tolerance band |
| Reverse Stand-off VRWM | 11 V - maximum continuous operating voltage before significant leakage begins |
| Leakage Current IR | ≤1 µA at VRWM - minimizes standby power loss and avoids false triggering in low-power circuits |
| Surge Current IPPM | 27.4 A - derived from VC and power rating; determines minimum trace width and fuse coordination |
| Junction Temperature TJ | +175°C - enables use in engine bay or enclosed industrial enclosures without active cooling |
Pinout & Package
SA11CA is housed in a DO-15 axial leaded package with cathode identification omitted-consistent with bidirectional construction. Leads are 0.375" long for standard PCB mounting and thermal dissipation per JEDEC guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (positive half-cycle) | Conducts transient energy into ground path when voltage exceeds +VBR |
| Cathode | Surge current entry (negative half-cycle) | Conducts transient energy into ground path when voltage exceeds –VBR - symmetric to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term leakage performance and humidity resistance in unsealed environments |
| 5.0 ns response time (bidirectional) | Ensures clamping activation before sensitive ICs experience overvoltage stress in fast-rising ESD events |
| Low incremental surge resistance | Minimizes voltage overshoot during high-di/dt transients, improving clamping predictability |
| ±175°C operating junction range | Supports placement near heat-generating components without thermal derating penalties |
| No cathode band marking | Confirms bidirectional functionality-eliminates polarity-dependent layout constraints |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24 V DC input channels of programmable logic controllers against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between field wiring and input conditioning circuitry. Use Value: Limits transient voltage to ≤18.2 V, preventing damage to optocouplers and ADC front-ends while maintaining signal integrity under repeated 500 W surges. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs against battery reverse connection and jump-start surges. IC Role / Device Role / Timing Role: Primary surge shunt on power rail and data line inputs of body control units. Use Value: Withstands 70 A IFSM pulses and clamps within 5 ns, ensuring CAN/LIN communication remains functional after 12 V system faults. |
| AC-DC Adapter Secondary Side | Smart Meter Power Supply Input |
Use Scenario: Suppressing flyback transformer ringing and external surge coupling on the low-voltage DC output of wall adapters. IC Role / Device Role / Timing Role: Secondary-side TVS connected across output capacitor terminals. Use Value: 11 V VRWM aligns with 12 V nominal outputs; 18.2 V VC prevents overvoltage trips in downstream LDOs without crowbar action. |
Use Scenario: Protecting metering SoCs and isolated power supplies from induced surges on utility-side AC inputs and battery backup lines. IC Role / Device Role / Timing Role: Bidirectional clamp on 3.3 V or 5 V auxiliary rails feeding real-time clocks and communication ICs. Use Value: ≤1 µA IR at 11 V ensures minimal battery drain in 10-year meter deployments; DO-15 form factor supports automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA | Same VRWM and VC, but SMB package (surface-mount); 600 W rating | Requires rework of footprint; better suited for high-density PCBs with automated assembly | Select when board space is constrained and thermal pad access is available |
| P6SMB11CA | Identical electrical specs, DO-214AA (SMB) package, 600 W rating | Not axial-leaded; incompatible with through-hole wave soldering unless adapted | Choose for improved surge margin and RoHS-compliant surface-mount production |
Compared with SA11CA, SMBJ11CA offers higher surge rating and smaller footprint but requires PCB redesign, while P6SMB11CA delivers identical protection in a modern surface-mount format-neither is drop-in compatible due to package mismatch, but both provide verified clamping performance for 11 V systems.
Availability
SA11CA is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and smart meter power supply inputs requiring stable component supply and long-lifecycle availability.
Supply support for SA11CA 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 designer of high-performance analog and discrete semiconductors, acquired by ON Semiconductor in 2016; its legacy TVS portfolio remains widely deployed in industrial and automotive systems.
The SAxxCA series was engineered specifically for robust, cost-effective board-level surge immunity in DC power distribution networks-emphasizing bidirectional symmetry, high-temperature reliability, and standardized DO-15 manufacturability.
FAQ
What is the clamping voltage of SA11CA at its rated peak pulse current?
The SA11CA has a maximum clamping voltage (VC) of 18.2 V when subjected to its peak pulse current (IPPM) of 27.4 A on the 10/1000 µs waveform. This value is measured per industry-standard test conditions and guarantees that protected circuitry will not experience voltages exceeding 18.2 V during a full-rated surge event. The SA11CA maintains this clamping performance bidirectionally, making it suitable for both positive and negative transient suppression.
Is SA11CA unidirectional or bidirectional, and how is polarity indicated?
SA11CA is a bidirectional transient voltage suppressor, as confirmed by the "CA" suffix and absence of a cathode color band. Unlike unidirectional variants (e.g., SA11A), it conducts symmetrically in both directions-clamping positive excursions above +12.2 V and negative excursions below –12.2 V. This eliminates orientation concerns during placement and supports AC-coupled or floating signal line protection where polarity reversal may occur.
What package type does SA11CA use, and what are its mechanical dimensions?
SA11CA uses the DO-15 axial-leaded package with standard 0.375" lead length, compliant with JEDEC TO-204AA. Its body diameter is approximately 2.5 mm and overall length is ~6.5 mm, enabling compatibility with legacy through-hole assembly processes and manual prototyping. The DO-15 form factor provides adequate thermal mass for 1.0 W steady-state dissipation at 75°C ambient, as specified in the Fairchild datasheet for SA11CA.
How does SA11CA's leakage current compare to similar 11 V TVS diodes?
SA11CA specifies a maximum reverse leakage current (IR) of 1 µA at its 11 V reverse stand-off voltage (VRWM), measured at 25°C. This is consistent with industry-standard performance for 500 W DO-15 TVS devices in this voltage class and ensures negligible standby power impact in battery-backed or energy-harvesting applications. The SA11CA achieves this low IR via glass passivation and tightly controlled junction processing-verified across production lots in Fairchild's qualification testing.
Can SA11CA be used in automotive applications requiring AEC-Q200 compliance?
SA11CA itself is not AEC-Q200 qualified; however, it meets key stress requirements referenced in the standard-including 175°C junction temperature rating, 70 A non-repetitive surge current, and robust glass-passivated construction. For AEC-Q200–mandated designs, engineers should verify qualification status of the specific lot or consult ON Semiconductor's current automotive-grade equivalents (e.g., SMAJ11CA-Q), as SA11CA was originally released prior to formal AEC alignment and lacks certified test reports for vibration, temperature cycling, or humidity bias.
SA11CA 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 27.4A
- 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
SA11CA FAQ
1.How can I place an order for SA11CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11CA 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 SA11CA reliable?
The price and inventory of SA11CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11CA is usually 5 days.
3.What payment methods are accepted for SA11CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11CA?
SA11CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11CA 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 SA11CA?
For technical support, including SA11CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11CA requirements.
6.How does Aetrix verify that SA11CA is sourced from the original manufacturer or authorized distributors?
All SA11CA 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 SA11CA meets industry standards.
7.What is the process for return or replacement of SA11CA?
All SA11CA units undergo pre-shipment inspection (PSI). If there is an issue with SA11CA, 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 SA11CA part is unused and in its original packaging.
Return procedure for SA11CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA11CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
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
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
