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onsemi SA150CA
- Part No.:
- SA150CA
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA150CA.pdf
- Description:
- TVS DIODE 150VWM 243VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,959
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Product details
Overview
SA150CA 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 150 V reverse stand-off voltage (VRWM), 167–185 V breakdown voltage (VBR), 243 V clamping voltage (VC) at 2.1 A peak pulse current, and operates up to +175 °C junction temperature - used in industrial power supplies and telecom line protection.
For engineers reviewing the SA150CA datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 10/1000 μs surges, low leakage (<1 μA at VRWM), fast response time (<5 ns bidirectional), DO-15 mechanical compatibility, and bipolar surge handling capability without polarity constraints.
Technical Context
The SA150CA is a glass-passivated, bidirectional TVS diode optimized for unidirectional or bidirectional transient suppression on AC or DC lines. Its symmetrical I-V characteristics ensure identical clamping behavior in both directions, with breakdown specified at 1 mA test current and clamping validated at 2.1 A IPPM on the standard 10/1000 μs waveform.
It exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.46), enabling robust protection of downstream circuitry against lightning-induced surges and inductive switching transients. Thermal derating follows JEDEC standards, supporting continuous operation up to 75 °C ambient with 1.0 W steady-state dissipation at 0.375" lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 500 W - sustains single high-energy surges per IEC 61000-4-5 Level 4 without failure |
| Reverse Stand-off Voltage (VRWM) | 150 V - maximum continuous operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 167–185 V @ 1 mA - guaranteed conduction onset range for reliable clamping threshold |
| Clamping Voltage (VC) | 243 V @ 2.1 A - maximum voltage seen by protected circuit during rated surge event |
| Peak Pulse Current (IPPM) | 2.1 A - peak current supported at VC under standardized 10/1000 μs waveform |
| Reverse Leakage (IR) | <1 μA @ 150 V - negligible standby power loss and minimal loading on source |
| Junction Temperature Range | −65 to +175 °C - enables deployment in harsh industrial and outdoor environments |
Pinout & Package
SA150CA uses the industry-standard DO-15 axial-leaded package with no cathode band (bidirectional construction). Leads are tinned and suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path terminal | No polarity marking; either lead serves as input/output for transient energy diversion |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Fast response time | <5 ns turn-on for bidirectional transients - limits voltage overshoot before clamping engages |
| Low incremental surge resistance | Enables tighter clamping ratio (VC/VBR = 1.46), reducing stress on downstream ICs |
| 500 W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment up to Level 4 |
| DO-15 mechanical compatibility | Direct drop-in replacement for legacy 1N62xx and P6SMB-style TVS diodes in existing PCB footprints |
Applications
| AC Power Input Protection | Telecom Line Interface |
|---|---|
Use Scenario: Protecting AC mains inputs of industrial PLCs and motor drives against lightning-induced surges and load dump transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across L-N or L/N-PE to shunt surge energy to ground before reaching rectifier and control ICs. Use Value: Withstands 500 W surges and clamps to 243 V, limiting stress on bridge rectifiers and bulk capacitors while maintaining system uptime. |
Use Scenario: Safeguarding RS-485/RS-232 data lines in base stations and remote telemetry units exposed to induced surges on long cable runs. IC Role / Device Role / Timing Role: Symmetrical TVS placed differential-mode across signal pairs to suppress common-mode and differential-mode transients without distorting signal integrity. Use Value: Sub-5 ns response ensures clamping occurs within first nanosecond of surge arrival, preserving signal eye diagram and preventing UART lockup. |
| DC Power Rail Protection | Automotive Body Control Module |
Use Scenario: Securing 24 V DC power rails in factory automation sensors and programmable logic controllers against inductive kickback and EFT bursts. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing transient energy on VCC/GND paths upstream of LDOs and microcontrollers. Use Value: 150 V VRWM allows use on 24 V systems with high-voltage tolerance margins; <1 μA leakage avoids battery drain in always-on nodes. |
Use Scenario: Protecting LIN bus and sensor supply lines in automotive body electronics subject to ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Bidirectional clamping device mounted near connector to divert surge energy before entering MCU I/O pins or transceivers. Use Value: 175 °C max junction temperature supports under-hood placement; DO-15 form factor fits constrained PCB space near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A | Surface-mount SMA package; same 150 V VRWM but lower 400 W peak power rating | Preferred for automated SMT assembly; unsuitable for through-hole or high-reliability axial-leaded designs | Select when board space is limited and reflow compatibility is required over mechanical ruggedness |
| P6SMB150A | Same DO-214AA package; identical electrical specs but higher typical IR (5 μA vs. <1 μA) | Better suited for cost-sensitive consumer applications where ultra-low leakage is non-critical | Choose when legacy DO-214AA footprint exists and leakage tolerance >1 μA is acceptable |
Compared with SMAJ150A and P6SMB150A, SA150CA delivers superior surge robustness (500 W vs. 400 W), lower leakage for precision sensing rails, and axial-leaded mechanical stability ideal for high-vibration industrial environments - making it optimal for mission-critical power-line protection where reliability outweighs footprint size.
Availability
SA150CA is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure equipment, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for SA150CA 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 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 SAxxxC(A) series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing clamping accuracy, thermal resilience, and bidirectional symmetry for AC/DC line protection.
FAQ
What is the clamping voltage of SA150CA at its rated peak pulse current?
The SA150CA has a maximum clamping voltage (VC) of 243 V when subjected to its rated peak pulse current of 2.1 A on the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream components like bridge rectifiers or DC-DC controllers remain within safe operating voltage ranges.
Is SA150CA unidirectional or bidirectional, and how does that affect circuit placement?
SA150CA is a bidirectional TVS diode, indicated by the "CA" suffix and absence of a cathode band. Its symmetrical I-V curve allows placement across any two points needing surge protection - such as AC line-to-line, differential signal pairs, or DC rail-to-ground - without regard to polarity. This eliminates orientation errors during assembly and simplifies design for AC-coupled or floating interfaces.
What is the maximum operating temperature for SA150CA, and how does thermal derating work?
The SA150CA has a maximum operating junction temperature of +175 °C and a storage temperature range of −65 to +175 °C. Its steady-state power dissipation is rated at 1.0 W with 0.375" lead length at TA = 75 °C, derating linearly to zero at 175 °C. Engineers must apply this curve when calculating allowable ambient temperature in enclosed enclosures or near heat sources.
Does SA150CA meet IEC 61000-4-5 surge immunity requirements?
Yes, SA150CA's 500 W peak pulse power rating on the 10/1000 μs waveform aligns with IEC 61000-4-5 Level 4 (4 kV line-to-earth, 2 kV line-to-line) for industrial environments. When properly implemented with appropriate series impedance and grounding, it provides compliant transient suppression for equipment seeking CE or UL certification in harsh electromagnetic environments.
What is the reverse leakage current specification for SA150CA at its rated stand-off voltage?
SA150CA specifies a maximum reverse leakage current (IR) of 1 μA at its 150 V reverse stand-off voltage (VRWM), tested at TA = 25 °C. This ultra-low leakage minimizes standby power loss and prevents false triggering in high-impedance sensing circuits - a key differentiator versus alternatives with 5–10 μA leakage at the same VRWM.
SA150CA 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):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 2.1A
- 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
SA150CA FAQ
1.How can I place an order for SA150CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA150CA 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 SA150CA reliable?
The price and inventory of SA150CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA150CA is usually 5 days.
3.What payment methods are accepted for SA150CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA150CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA150CA?
SA150CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA150CA 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 SA150CA?
For technical support, including SA150CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA150CA requirements.
6.How does Aetrix verify that SA150CA is sourced from the original manufacturer or authorized distributors?
All SA150CA 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 SA150CA meets industry standards.
7.What is the process for return or replacement of SA150CA?
All SA150CA units undergo pre-shipment inspection (PSI). If there is an issue with SA150CA, 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 SA150CA part is unused and in its original packaging.
Return procedure for SA150CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA150CA Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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