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Vishay General Semiconductor - Diodes Division SA40CAHE3/54
- Part No.:
- SA40CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA40CAHE3/54.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,738
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Product details
Overview
SA40CAHE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 40 V stand-off voltage (VWM), 64.5 V maximum clamping voltage at 7.8 A peak pulse current, 500 W peak pulse power rating with 10/1000 μs waveform, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA40CAHE3/54 datasheet, SA40CAHE3/54 pinout, SA40CAHE3/54 application, or SA40CAHE3/54 equivalent, key selection criteria include bidirectional clamping capability, DO-15 through-hole compatibility, 175 °C max junction temperature, low incremental surge resistance, and compliance with IEC 61000-4-2/4-4/4-5 for system-level ESD and surge protection.
Technical Context
The SA40CAHE3/54 operates as a symmetric, bidirectional avalanche diode that conducts in both polarities when reverse voltage exceeds its breakdown threshold (~44.4–49.1 V). Its glass-passivated junction enables fast response (<1 ns) to transient events and stable performance under repetitive surges at 0.01% duty cycle.
Designed for unclamped inductive switching and lightning-induced transients, it delivers consistent clamping across -55 °C to +175 °C operating range, with temperature coefficient of ±46 mV/°C on VBR and <1 μA leakage at 40 V stand-off - critical for low-power sensor interface and automotive body electronics protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 36–42 V nominal systems. |
| VBR min/max | 44.4 V / 49.1 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 64.5 V - Clamps 10/1000 μs surge up to 7.8 A to ≤64.5 V, limiting downstream IC stress to safe levels per IEC 61000-4-5 Level 4. |
| PPPM | 500 W - Sustains single 10/1000 μs transient energy without degradation; supports robust protection in industrial motor drives and automotive ECUs. |
| TJ max | +175 °C - Enables placement near heat sources (e.g., power MOSFETs, engine compartments) without derating concerns. |
| AEC-Q101 | Qualified - Validated for automotive applications including passenger cabin modules, lighting control units, and infotainment power rails. |
| Package | DO-15 (DO-204AC) - Standard through-hole outline with 0.242–0.258 inch body length; compatible with legacy wave-solder and hand-solder processes. |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with matte tin-plated leads. Bidirectional construction means no polarity marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Conducts equally in both directions above VBR; connects across protected line and ground (or between differential lines) to shunt surge current. |
| Leads (L1/L2) | PCB mechanical & thermal interface | Supports 275 °C solder dip (10 s max); provides thermal path to board copper for steady-state power dissipation (PD = 3.0 W). |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables <1 ns response time and stable leakage (<1 μA at VWM) over lifetime and temperature cycling. |
| 500 W peak pulse power (10/1000 μs) | Handles IEC 61000-4-5 combination wave surges (e.g., 2 Ω source impedance, 40 A) without failure. |
| AEC-Q101 qualification | Validated for automotive underhood and interior modules per stress tests including HTOL, TC, UHAST, and mechanical shock. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes let-through voltage during surge, reducing risk of latch-up or gate oxide damage in protected MOSFETs or microcontrollers. |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed automotive and industrial enclosures. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting LIN bus and switch inputs in door module ECUs from load dump and ESD events during vehicle operation. IC Role / Device Role / Timing Role: Bidirectional TVS placed between LIN line and chassis ground to clamp transients before they reach transceiver IC input pins. Use Value: Maintains signal integrity below 64.5 V during 10/1000 μs surges up to 7.8 A, preventing communication faults and ensuring ASIL-B functional safety compliance. | Use Scenario: Safeguarding 24 V DC digital input channels of programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary front-end protection device across input terminal and common rail, absorbing >500 W transient energy without degradation. Use Value: Enables reliable operation in factory environments with frequent inductive switching, eliminating false triggering and extending input circuit lifetime. |
| Consumer Appliance Motor Drive | Telecom Power Interface |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in smart washing machine motor inverters from brush-commutator noise and back-EMF spikes. IC Role / Device Role / Timing Role: Localized TVS mounted directly at motor driver IC supply pins to suppress sub-microsecond transients before propagation into logic circuitry. Use Value: Prevents reset corruption and MOSFET shoot-through by limiting voltage overshoot to ≤64.5 V during 7.8 A surges, supporting IEC 61000-4-4 EFT immunity. | Use Scenario: Protecting 48 V PoE-powered Ethernet ports in network switches from lightning-induced longitudinal surges on data pairs and power conductors. IC Role / Device Role / Timing Role: Bidirectional clamping element across each twisted pair and between power/return lines to equalize potential during surge events. Use Value: Withstands repeated 10/1000 μs surges up to 500 W while maintaining <1 μA leakage at 40 V, preserving signal integrity and minimizing standby power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA | Same VWM (40 V) and VC (64.5 V), but SMB package (surface-mount); 600 W PPPM rating; lower thermal resistance. | Requires PCB rework for SMT assembly; better suited for space-constrained telecom modules than through-hole industrial boards. | Select SMBJ40CA when board real estate is limited and automated assembly is used; retain SA40CAHE3/54 for manual repair, high-reliability through-hole layouts, or legacy wave-solder lines. |
| P6KE40CA | Same DO-15 package and VWM, but older generation; 400 W PPPM; higher clamping voltage (69.4 V); no AEC-Q101 qualification. | Lacks automotive qualification and has reduced surge margin; suitable only for cost-sensitive non-automotive industrial use. | Choose P6KE40CA only for non-automotive applications where AEC-Q101 is not required and 400 W surge rating suffices; prefer SA40CAHE3/54 for automotive or higher-reliability deployments. |
Compared with SMBJ40CA and P6KE40CA, the SA40CAHE3/54 uniquely combines AEC-Q101 qualification, DO-15 through-hole compatibility, and 500 W surge capability - making it the preferred choice for automotive body electronics and industrial controls requiring field-serviceable, high-reliability transient protection.
Availability
SA40CAHE3/54 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC digital inputs, and consumer appliance motor drive circuits requiring stable component supply and long-term lifecycle support.
Supply support for SA40CAHE3/54 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SAxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust, bidirectional transient suppression in harsh environments - targeting automotive, industrial automation, and telecom infrastructure applications.
FAQ
What is the clamping voltage of SA40CAHE3/54 at its rated peak pulse current?
The SA40CAHE3/54 has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPPM) of 7.8 A using the standard 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees the protected circuit sees no more than 64.5 V during worst-case surge conditions - critical for safeguarding 3.3 V or 5 V logic interfaces downstream of the SA40CAHE3/54.
Is SA40CAHE3/54 suitable for automotive applications?
Yes, the SA40CAHE3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its DO-15 package, 175 °C maximum junction temperature, and validated performance under temperature cycling, humidity, and mechanical shock make it appropriate for body control modules, lighting drivers, and infotainment power rails - provided layout follows Vishay's recommended pad dimensions and thermal relief guidelines for the SA40CAHE3/54.
How does the bidirectional nature of SA40CAHE3/54 affect its circuit placement?
The bidirectional design of SA40CAHE3/54 means it has no polarity marking and conducts identically in both directions - enabling placement across any two nodes subject to differential or common-mode transients, such as between signal and ground, across differential pairs, or between power and return. Unlike unidirectional TVS diodes, the SA40CAHE3/54 requires no orientation check during assembly, simplifying manufacturing and reducing misplacement risk.
What is the maximum steady-state power dissipation for SA40CAHE3/54?
The SA40CAHE3/54 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) of 75 °C. In practical PCB layouts, derating applies per Figure 5 in the datasheet; for example, at TL = 100 °C, PD drops to ~2.0 W. This rating governs continuous leakage current handling and must be considered alongside ambient temperature and copper area in thermal design for the SA40CAHE3/54.
Does SA40CAHE3/54 meet RoHS and REACH compliance?
Yes, the SA40CAHE3/54 carries the HE3 suffix, indicating full RoHS compliance (per EU Directive 2011/65/EU) and JESD 201 Class 2 whisker resistance. It also meets REACH SVHC requirements as defined in Vishay's material declaration document #99912. These compliance attributes are certified and traceable for each production lot of the SA40CAHE3/54, supporting environmental compliance reporting for global OEMs.
SA40CAHE3/54 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA40CAHE3/54 FAQ
1.How can I place an order for SA40CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA40CAHE3/54 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 SA40CAHE3/54 reliable?
The price and inventory of SA40CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA40CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA40CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA40CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA40CAHE3/54?
SA40CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA40CAHE3/54 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 SA40CAHE3/54?
For technical support, including SA40CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA40CAHE3/54 requirements.
6.How does Aetrix verify that SA40CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA40CAHE3/54 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 SA40CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA40CAHE3/54?
All SA40CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA40CAHE3/54, 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 SA40CAHE3/54 part is unused and in its original packaging.
Return procedure for SA40CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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