My Inquiry
My Account
onsemi SA26CA
- Part No.:
- SA26CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA26CA.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:5,187
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA26CA from Fairchild Semiconductor is a 500 W bidirectional transient voltage suppressor (TVS) diode in DO-15 package, with 26 V reverse stand-off voltage (VRWM), 28.9–31.9 V breakdown voltage (VBR), 42.1 V clamping voltage at 11.9 A peak pulse current, and 1.0 µA max reverse leakage at VRWM. It protects DC power rails and signal lines against ESD and lightning-induced surges in industrial control interfaces.
For engineers reviewing the SA26CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping symmetry, sub-5 ns response time, low incremental surge resistance, and DO-15 through-hole compatibility for high-energy surge immunity in harsh-environment power supplies and automotive body electronics.
Technical Context
The SA26CA implements a glass-passivated silicon junction optimized for bipolar transient suppression, delivering symmetrical clamping in both directions per its CA suffix designation. Its 10/1000 µs waveform rating of 500 W and 11.9 A IPPM enables robust protection against IEC 61000-4-5 Level 4 surges.
With a maximum operating junction temperature of +175°C and storage range from –65°C to +175°C, the device supports extended thermal operation in engine bay and factory automation environments. Its fast response-typically under 5.0 ns from 0 V to VBR-ensures clamping before sensitive downstream circuitry sustains damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 500 W - sustains single high-energy transients per IEC 61000-4-5 without failure |
| Reverse Stand-off Voltage (VRWM) | 26 V - defines maximum continuous DC operating voltage before significant leakage |
| Breakdown Voltage (VBR) | 28.9–31.9 V at 1.0 mA - ensures reliable turn-on margin above VRWM for stable clamping threshold |
| Clamping Voltage (VC) | 42.1 V at 11.9 A - limits voltage seen by protected ICs during worst-case surge events |
| Reverse Leakage (IR) | ≤1.0 µA at 26 V - minimizes standby power loss and avoids false triggering in low-current circuits |
| Response Time | <5.0 ns - activates before most microcontrollers or analog front-ends experience overstress |
| Junction Temperature Range | –65°C to +175°C - supports deployment in under-hood, motor drive, and industrial PLC applications |
Pinout & Package
DO-15 axial-leaded package with no cathode band (bidirectional configuration); leads are tinned copper, suitable for wave or hand soldering at ≤260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry point in negative polarity events | Conducts surge current when voltage at this terminal falls ≥VBR below cathode potential |
| Cathode (Lead 2) | Transient current entry point in positive polarity events | Conducts surge current when voltage at this terminal rises ≥VBR above anode potential |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| 500 W peak pulse power (10/1000 µs) | Provides immunity to 4 kV/2 Ω combination wave surges per IEC 61000-4-5 Ed. 3 |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision |
| Bidirectional symmetry | Delivers identical VBR, VC, and IPPM in both polarities-no polarity-sensitive layout required |
| Fast response time (<5.0 ns) | Enables protection of high-speed interfaces like CAN FD and RS-485 without signal distortion |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC input rails in variable-frequency drives exposed to inductive switching spikes and load dump transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across input terminals to shunt energy into chassis ground during >100 V transients. Use Value: Limits rail voltage to ≤42.1 V during 11.9 A surges, preventing damage to upstream rectifiers and downstream DC-DC controllers. | Use Scenario: Surge suppression on LIN bus lines and power inputs in door module ECUs subjected to ISO 7637-2 pulse 5a (load dump). IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply line, mounted near connector to intercept transients before entering PCB. Use Value: Withstands 500 W pulses while maintaining <1 µA leakage at 13.5 V nominal, avoiding battery drain and false resets. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Input-stage protection on -48 V DC telecom power distribution boards facing lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS connected between power and return, referenced to earth ground via low-inductance path. Use Value: Clamps differential surges to ≤42.1 V within 5 ns, preserving integrity of hot-swap controllers and PMBus monitoring ICs. | Use Scenario: DC-link surge protection in solar string inverters where PV array inputs face rapid voltage reversals and grid fault coupling. IC Role / Device Role / Timing Role: Symmetrical clamp across PV+ and PV− terminals to absorb bidirectional transients from arc faults or grid switching. Use Value: Operates reliably up to +175°C junction temperature, matching thermal profile of outdoor-mounted inverters without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA | Same VRWM and VBR range but in SMB surface-mount package; 600 W rating; lower thermal resistance (junction-to-ambient ≈ 40°C/W vs DO-15's ≈ 65°C/W) | Requires PCB rework for SMT assembly; better suited for space-constrained, high-density layouts | Select SMBJ26CA when board area is limited and automated assembly is used; retain SA26CA for through-hole reliability in high-vibration environments |
| P6SMB26CA | Identical electrical specs and DO-214AA (SMB) package; manufactured by ON Semiconductor; same 500 W rating and 42.1 V VC | No change in circuit function or protection level; differs only in branding and traceability chain | Choose P6SMB26CA for dual-sourcing flexibility where OEM requires multi-supplier qualification |
Compared with SMBJ26CA and P6SMB26CA, the SA26CA offers proven mechanical robustness in axial-leaded form for high-shock applications, while trading off slightly higher thermal resistance for easier manual rework and legacy board compatibility.
Availability
SA26CA is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and renewable energy inverters requiring stable component supply across multi-year production cycles.
Supply support for SA26CA 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 and manufacturer of power semiconductors, acquired by ON Semiconductor in 2016; its TVS portfolio remains widely deployed in industrial and automotive systems.
The SAxxCA series was engineered specifically for high-energy, bidirectional transient suppression in DC power systems where reliability under thermal and surge stress is critical-targeting applications from factory automation to vehicle electrification.
FAQ
What is the clamping voltage of the SA26CA at its rated peak pulse current?
The SA26CA has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current (IPPM) of 11.9 A on a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that downstream circuitry will not experience voltages exceeding 42.1 V during defined surge events. The SA26CA maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Is the SA26CA suitable for protecting CAN bus lines?
Yes, the SA26CA is suitable for protecting CAN bus physical layers, particularly in 24 V industrial or commercial vehicle networks where common-mode surges exceed 25 V. Its <5.0 ns response time ensures clamping activation before CAN transceivers (e.g., TJA1042) sustain damage, and its 42.1 V VC limits bus voltage excursions. However, for high-speed CAN FD (5 Mbps), verify layout parasitics-SA26CA's capacitance is not specified in the datasheet, so system-level testing is recommended. The SA26CA must be placed close to the connector with short, low-inductance traces.
Does the SA26CA have polarity markings on its package?
No, the SA26CA does not have a cathode band or polarity marking on its DO-15 package because it is a bidirectional TVS diode (denoted by the "CA" suffix). Unlike unidirectional TVS devices, which use a colored band to indicate cathode, the SA26CA conducts identically in both directions-so either lead may serve as anode or cathode depending on transient polarity. This eliminates orientation errors during manual assembly and simplifies PCB footprint design.
What is the maximum junction temperature rating for the SA26CA?
The SA26CA has a maximum operating junction temperature (TJ) of +175°C, as specified in Fairchild's Absolute Maximum Ratings table. This allows the device to remain functional in high-temperature environments such as engine compartments, motor drive heatsinks, or enclosed solar inverters. Derating curves in the datasheet confirm usable power dissipation down to ambient temperatures of +75°C with standard 0.375" lead length, supporting continuous operation in thermally demanding applications using the SA26CA.
How does the SA26CA compare to the SA24CA in terms of voltage ratings and surge handling?
The SA26CA has a higher reverse stand-off voltage (26 V vs. 24 V), breakdown voltage (28.9–31.9 V vs. 26.7–29.5 V), and clamping voltage (42.1 V vs. 38.9 V) than the SA24CA. Both share identical 500 W peak pulse power and DO-15 packaging, but the SA26CA delivers greater headroom for 24 V nominal systems experiencing moderate overvoltage-such as regulated 24 V supplies with ±10% tolerance-while still clamping effectively during transients. The SA26CA's 11.9 A IPPM is slightly lower than SA24CA's 12.8 A, reflecting the trade-off between voltage rating and surge current capacity.
SA26CA 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 11.9A
- 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
SA26CA FAQ
1.How can I place an order for SA26CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA26CA 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 SA26CA reliable?
The price and inventory of SA26CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA26CA is usually 5 days.
3.What payment methods are accepted for SA26CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA26CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA26CA?
SA26CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA26CA 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 SA26CA?
For technical support, including SA26CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA26CA requirements.
6.How does Aetrix verify that SA26CA is sourced from the original manufacturer or authorized distributors?
All SA26CA 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 SA26CA meets industry standards.
7.What is the process for return or replacement of SA26CA?
All SA26CA units undergo pre-shipment inspection (PSI). If there is an issue with SA26CA, 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 SA26CA part is unused and in its original packaging.
Return procedure for SA26CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA26CA 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…
