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Vishay General Semiconductor - Diodes Division SA14CAHE3/54
- Part No.:
- SA14CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14CAHE3/54.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,061
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Product details
Overview
SA14CAHE3/54 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 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), 21.6 A peak pulse current (IPPM), and 23.2 V maximum clamping voltage (VC) - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits.
For engineers reviewing the SA14CAHE3/54 datasheet, SA14CAHE3/54 pinout, SA14CAHE3/54 application, or SA14CAHE3/54 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, DO-15 mechanical compatibility, low incremental surge resistance, and compliance with IEC 61000-4-2/4-4/4-5 ESD/surge immunity requirements.
Technical Context
The SA14CAHE3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling symmetrical clamping in both polarities. Its bidirectional architecture eliminates polarity dependency during transient events, supporting protection of AC-coupled or floating signal paths without external rectification.
It delivers 500 W peak pulse power under standardized 10/1000 µs waveform with 0.01% duty cycle, and maintains stable clamping performance across -55 °C to +175 °C junction temperature range. The device exhibits low dynamic impedance and fast response time (<1 ns), critical for suppressing ESD and lightning-induced surges before downstream IC damage occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin in protected line. |
| VBR (min/max) | 15.6 V / 17.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on within tight tolerance for reliable overvoltage thresholding. |
| VC @ IPPM | 23.2 V at 21.6 A - Clamped voltage during worst-case 500 W transient; limits stress on downstream components like microcontrollers or transceivers. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 µs waveform; supports robust immunity against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| IPPM | 21.6 A - Corresponding peak current at VC; enables accurate PCB trace sizing and fuse coordination. |
| TJ max | +175 °C - Maximum junction temperature; allows operation in under-hood automotive or high-ambient industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
Pinout & Package
Package: DO-15 (DO-204AC), axial-leaded, epoxy-molded case with matte tin-plated leads. RoHS-compliant, AEC-Q101 qualified (HE3 suffix), UL 94 V-0 rated molding compound. No polarity marking - bidirectional symmetry confirmed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Leads are interchangeable; bidirectional clamping requires no orientation during placement - simplifies automated assembly and reduces BOM variants. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable avalanche characteristics and long-term reliability under repetitive surge stress without parameter drift. |
| 500 W peak pulse power (10/1000 µs) | Supports protection against severe transients including ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 combination wave surges. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules where field failure risk must be minimized. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin for sensitive CMOS inputs. |
| DO-15 mechanical standardization | Ensures drop-in replacement compatibility with legacy TVS designs and broad availability of compatible sockets, clips, and test fixtures. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Prevents latch-up or gate oxide rupture in downstream op-amps and ADC drivers by limiting transient voltage to ≤23.2 V during 21.6 A surges. | Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to motor drive noise and relay contact bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Maintains signal integrity under repeated 1 kV/2 Ω surge events per IEC 61000-4-5, avoiding calibration drift or offset errors in precision measurement stages. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding Ethernet PHY interfaces, DSL line drivers, and POTS line cards from lightning-induced surges entering via unshielded copper pairs. IC Role / Device Role / Timing Role: First-stage transient suppressor mounted directly at RJ-45 or terminal block, preceding gas discharge tube (GDT) or polymer PTC secondary protection. Use Value: Fast sub-nanosecond response clamps induced common-mode voltages below IC absolute maximum ratings before GDT fires, reducing let-through energy. | Use Scenario: Protecting microcontroller GPIOs and half-bridge gate drivers in washing machine, HVAC, or power tool inverters from back-EMF generated by brushed DC or BLDC motors. IC Role / Device Role / Timing Role: Localized clamping across motor coil supply rails and control signal lines to absorb commutation spikes and prevent false triggering. Use Value: Enables reliable operation at ambient temperatures up to +105 °C while sustaining 500 W pulses without thermal runaway or parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14CA | Same VWM (14 V), but SMA package (SMT); lower IPPM (21.2 A), same VC (23.2 V); 400 W rating. | Surface-mount alternative requiring PCB re-layout; better suited for space-constrained consumer electronics vs. through-hole industrial modules. | Select SMAJ14CA when board area is limited and automated SMT assembly is preferred; verify thermal pad design for 3 W steady-state dissipation. |
| P6KE15CA | Higher VWM (15 V), VBR 16.7–18.5 V, same DO-15 package; 600 W rating, VC = 24.4 V at 24.4 A. | Marginally higher clamping voltage; suitable where system tolerates 24.4 V transient ceiling and requires extra pulse energy headroom. | Choose P6KE15CA if design requires >500 W surge margin or tighter VBR tolerance (±5% vs. SA14CAHE3/54's ±5.7%), but confirm 15 V VWM aligns with signal swing. |
Compared with SMAJ14CA and P6KE15CA, the SA14CAHE3/54 offers AEC-Q101 qualification and exact 14 V stand-off matching common 12 V rail protections, making it optimal for automotive and high-reliability industrial deployments where through-hole mounting and automotive qualification are mandatory.
Availability
SA14CAHE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line card surge protection, and consumer appliance motor drive circuits requiring stable component supply and long-term lifecycle support.
Supply support for SA14CAHE3/54 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 passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxCA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, bidirectional transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of the SA14CAHE3/54 under maximum rated surge current?
The SA14CAHE3/54 has a maximum clamping voltage (VC) of 23.2 V at its rated peak pulse current (IPPM) of 21.6 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream component voltage margining in designs using the SA14CAHE3/54.
Is the SA14CAHE3/54 suitable for automotive applications?
Yes, the SA14CAHE3/54 is AEC-Q101 qualified, confirming its reliability for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces. Its DO-15 package, -55 °C to +175 °C operating range, and validated surge endurance make it appropriate for under-hood and cabin-mounted systems where the SA14CAHE3/54 provides certified transient protection.
Does the SA14CAHE3/54 have polarity markings on the package?
No, the SA14CAHE3/54 is a bidirectional TVS diode and carries no polarity marking on the DO-15 package. Its symmetrical construction means either lead may serve as anode or cathode - this eliminates orientation constraints during PCB assembly and supports flexible layout in AC-coupled or floating signal paths where the SA14CAHE3/54 is deployed.
What is the maximum steady-state power dissipation for the SA14CAHE3/54?
The SA14CAHE3/54 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C. This rating applies to continuous DC or low-duty-cycle conditions and must be derated linearly above 75 °C per the manufacturer's derating curve - critical for thermal design when the SA14CAHE3/54 is used in high-ambient environments.
How does the SA14CAHE3/54 differ from unidirectional SA14A variants?
The SA14CAHE3/54 is bidirectional with symmetrical clamping in both directions and no cathode band, whereas the unidirectional SA14A has a marked cathode end and only clamps in reverse bias. The SA14CAHE3/54's VBR (15.6–17.2 V) and VC (23.2 V) apply equally for positive and negative transients - essential for protecting AC signals or differential buses where the SA14CAHE3/54 replaces two unidirectional devices.
SA14CAHE3/54 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 21.6A
- 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)
SA14CAHE3/54 FAQ
1.How can I place an order for SA14CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14CAHE3/54 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 SA14CAHE3/54 reliable?
The price and inventory of SA14CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA14CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14CAHE3/54?
SA14CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14CAHE3/54 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 SA14CAHE3/54?
For technical support, including SA14CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14CAHE3/54 requirements.
6.How does Aetrix verify that SA14CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA14CAHE3/54 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 SA14CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA14CAHE3/54?
All SA14CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA14CAHE3/54, 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 SA14CAHE3/54 part is unused and in its original packaging.
Return procedure for SA14CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA14CAHE3/54 Tags
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