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Vishay General Semiconductor - Diodes Division SA40CA-E3/54
- Part No.:
- SA40CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA40CA-E3/54.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,335
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Product details
Overview
SA40CA-E3/54 from Vishay General Semiconductor is a bidirectional TransZORB® transient voltage suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 40 V standoff voltage (VWM), 64.5 V maximum clamping voltage (VC) at 7.8 A peak pulse current, 500 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA40CA-E3/54 datasheet, SA40CA-E3/54 pinout, SA40CA-E3/54 application, or SA40CA-E3/54 equivalent, this device is selected for robust ESD and surge protection in bidirectional AC-coupled interfaces, sensor signal conditioning paths, and automotive body electronics where polarity-agnostic clamping and low leakage (<1.0 μA at 40 V) are critical.
Technical Context
The SA40CA-E3/54 operates as a symmetrical avalanche diode with identical breakdown characteristics in both directions (VBR min/max = 44.4 V / 49.1 V at 1.0 mA). Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while its DO-15 package supports manual or automated through-hole assembly with matte tin-plated leads compliant to J-STD-002.
It delivers 500 W peak pulse power under standardized 10/1000 μs waveform conditions, with clamping performance validated up to 7.8 A (IPPM). Thermal derating begins above 25 °C ambient, maintaining operation up to TJ = +175 °C, and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse voltage before significant leakage; defines operating window for protected circuit |
| VBR (min/max) | 44.4 V / 49.1 V at 1.0 mA - Symmetrical breakdown threshold in both directions; ensures consistent clamping onset |
| VC @ IPPM | 64.5 V at 7.8 A - Clamped voltage during 500 W transient; limits stress on downstream ICs or MOSFETs |
| IPPM | 7.8 A - Peak surge current capability under 10/1000 μs waveform; determines survivability against IEC 61000-4-5 Level 3 surges |
| PPPM | 500 W - Peak pulse power rating; enables protection of medium-energy transients without thermal runaway |
| ID @ VWM | <1.0 μA - Reverse leakage at rated standoff; minimizes quiescent power loss in battery-powered systems |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive deployment and high-ambient industrial use |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with axial leads; no polarity marking for bidirectional operation; matte tin-plated terminals solderable per J-STD-002; 0.432 g unit weight; RoHS-compliant (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | No functional distinction between leads; either lead may connect to line or ground; enables AC-coupled protection without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable leakage current and long-term reliability under thermal cycling and humidity exposure |
| 500 W peak pulse power (10/1000 μs) | Withstands repeated lightning-induced surges per IEC 61000-4-5 without degradation |
| AEC-Q101 qualified | Validated for automotive applications including body control modules and sensor interfaces |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive ICs |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed enclosures, meeting safety standards for industrial equipment |
Applications
| Automotive Body Electronics | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting LIN bus transceivers and door module microcontrollers from load dump and inductive switching transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential signal pair or supply rail to limit voltage excursions to safe levels. Use Value: Enables reliable operation at TJ up to +175 °C and withstands repetitive 500 W pulses without parameter drift. | Use Scenario: Shielding analog outputs of pressure or temperature sensors from ESD events and motor drive coupling noise in factory automation PLCs. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) TVS placed at sensor connector interface to shunt transients before reaching precision amplifier inputs. Use Value: Maintains signal integrity with minimal DC loading due to sub-microamp reverse leakage at 40 V standoff. |
| Consumer Audio Input Protection | Telecom Line Interface |
Use Scenario: Safeguarding balanced audio inputs (e.g., XLR or TRS) in professional mixers against human-body ESD and cable discharge events. IC Role / Device Role / Timing Role: Symmetrical clamping device across differential input pins to prevent latch-up or gate oxide damage in op-amps. Use Value: Sub-1 ns response time and matched VBR in both directions preserve signal symmetry during transient suppression. | Use Scenario: Providing primary surge immunity on telephone line interface circuits in VoIP gateways and DSL modems. IC Role / Device Role / Timing Role: First-stage protector on tip/ring lines before hybrid transformer or line driver ICs. Use Value: 64.5 V clamping voltage ensures compliance with GR-1089-CORE Level 3 surge requirements while limiting stress on downstream components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40CA | Same VWM (40 V) and VC (64.5 V), but SMC (DO-214AB) surface-mount package; 400 W PPPM | Requires PCB rework for SMT layout; unsuitable for through-hole legacy designs | Select SMAJ40CA only when board space is constrained and SMT assembly is available. |
| P6KE40CA | Same DO-15 package and VWM, but lower PPPM (600 W) and higher VC (69.4 V); older generation with wider VBR tolerance | Marginally higher clamping voltage reduces protection headroom for 3.3 V or 5 V logic rails | Choose P6KE40CA only if legacy BOM compatibility outweighs clamping performance optimization. |
Compared with SMAJ40CA and P6KE40CA, the SA40CA-E3/54 provides optimal balance of through-hole manufacturability, 500 W surge handling, tight 44.4–49.1 V VBR range, and AEC-Q101 qualification-making it preferred for new automotive and industrial designs requiring verified reliability and precise clamping.
Availability
SA40CA-E3/54 is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor interfaces, and telecom line protection requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for SA40CA-E3/54 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SAxxCA series is part of Vishay's TransZORB® TVS portfolio, engineered specifically for bidirectional transient suppression in automotive, industrial, and communications systems where polarity-agnostic clamping and AEC-Q101 compliance are mandatory.
FAQ
What is the standoff voltage rating of the SA40CA-E3/54?
The SA40CA-E3/54 has a standoff voltage (VWM) of 40 V, meaning it remains non-conductive below this reverse voltage level while exhibiting less than 1.0 μA leakage current. This rating defines the maximum continuous operating voltage of the protected circuit and ensures compatibility with 36 V nominal automotive and industrial power rails.
Is the SA40CA-E3/54 suitable for automotive applications?
Yes, the SA40CA-E3/54 is AEC-Q101 qualified and manufactured with glass-passivated junction technology, making it suitable for automotive body electronics such as door modules, lighting controllers, and sensor interfaces. Its DO-15 package supports vibration-resistant through-hole mounting, and its +175 °C maximum junction temperature accommodates under-hood environments.
What is the clamping voltage of the SA40CA-E3/54 at its rated peak pulse current?
The SA40CA-E3/54 clamps to a maximum of 64.5 V at its rated peak pulse current (IPPM) of 7.8 A under the standard 10/1000 μs waveform. This clamping voltage is measured across the device terminals during surge conduction and represents the upper voltage limit imposed on the protected circuit during transient events.
Does the SA40CA-E3/54 have polarity markings on its package?
No, the SA40CA-E3/54 does not have polarity markings because it is a bidirectional TVS diode. Its symmetrical construction means either lead can be connected to line or ground without affecting performance. This eliminates orientation errors during manual or automated assembly and simplifies design for AC-coupled signal paths.
What is the peak pulse power rating of the SA40CA-E3/54 and how is it defined?
The SA40CA-E3/54 has a peak pulse power rating (PPPM) of 500 W, defined per the 10/1000 μs double-exponential waveform specified in ANSI/IEEE C62.35. This rating reflects the device's ability to absorb and dissipate transient energy without failure, assuming a duty cycle ≤ 0.01 % and ambient temperature ≤ 25 °C.
SA40CA-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA40CA-E3/54 FAQ
1.How can I place an order for SA40CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA40CA-E3/54 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 SA40CA-E3/54 reliable?
The price and inventory of SA40CA-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA40CA-E3/54 is usually 5 days.
3.What payment methods are accepted for SA40CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA40CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA40CA-E3/54?
SA40CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA40CA-E3/54 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 SA40CA-E3/54?
For technical support, including SA40CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA40CA-E3/54 requirements.
6.How does Aetrix verify that SA40CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA40CA-E3/54 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 SA40CA-E3/54 meets industry standards.
7.What is the process for return or replacement of SA40CA-E3/54?
All SA40CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA40CA-E3/54, 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 SA40CA-E3/54 part is unused and in its original packaging.
Return procedure for SA40CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA40CA-E3/54 Tags
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