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Vishay General Semiconductor - Diodes Division SA15CAHE3/54
- Part No.:
- SA15CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA15CAHE3/54.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,875
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Product details
Overview
SA15CAHE3/54 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 15 V standoff voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 1 mA, 20.5 A peak pulse current (IPPM), 24.4 V clamping voltage (VC) at IPPM, and 500 W peak pulse power (10/1000 μs waveform).
For engineers reviewing the SA15CAHE3/54 datasheet, SA15CAHE3/54 pinout, SA15CAHE3/54 application, or SA15CAHE3/54 equivalent, this AEC-Q101-qualified TVS provides validated surge protection for automotive sensor interfaces, industrial I/O lines, and telecom line cards where bidirectional transient immunity and RoHS-compliant, whisker-tested leads are required.
Technical Context
The SA15CAHE3/54 operates as a symmetric, bidirectional avalanche diode with no polarity marking-its junction responds identically to positive and negative transients. It delivers clamping action within <1 ns and maintains low incremental surge resistance under repetitive 10/1000 μs pulses at 0.01% duty cycle.
Designed for operation across –55 °C to +175 °C junction temperature, it sustains 3.0 W steady-state power dissipation at TL = 75 °C and withstands 70 A unidirectional forward surge (though not applicable here due to bidirectional configuration). Its glass-passivated chip junction ensures stable VBR and low leakage (<1.0 μA at VWM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 16.7 V / 18.5 V at IT = 1 mA - defines guaranteed avalanche onset range for design margining |
| VC @ IPPM | 24.4 V at 20.5 A - clamped voltage seen by protected circuit during worst-case 10/1000 μs surge |
| PPPM | 500 W - peak transient energy absorption capability per single 10/1000 μs pulse |
| ID @ VWM | <1.0 μA - ultra-low leakage preserves signal integrity in high-impedance sensor or data lines |
| TJ Range | –55 °C to +175 °C - supports under-hood automotive and industrial environments without derating |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: DO-15 (DO-204AC), axial lead, molded epoxy case with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Bidirectional construction means no cathode band; both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as input/output for bidirectional clamping; no polarity dependency in layout |
| Lead 1 / Lead 2 | Mounting interface | Matte tin-plated, solderable per J-STD-002; qualified to JESD 201 Class 2 whisker test (HE3 suffix) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift |
| 500 W peak pulse rating (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge protection without external series impedance |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS sensor interfaces |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for enclosed industrial and telecom equipment |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability applications with >10-year field life expectations |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping device placed directly across differential or single-ended signal lines upstream of IC input pins. Use Value: Limits transient voltage to ≤24.4 V, preventing damage to 3.3 V/5 V sensor front-ends while maintaining signal fidelity via sub-1 μA leakage. | Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary surge suppression element mounted at connector entry point, shunting transients to ground before reaching optocoupler or MCU GPIO. Use Value: Absorbs 500 W pulses without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station remote units from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Secondary-level protection paired with GDT or polymer PTC, placed adjacent to IC to clamp residual let-through voltage. Use Value: Clamps to 24.4 V within nanoseconds, preserving signal integrity on 12 V bias rails and meeting GR-1089-CORE telecom immunity requirements. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Across-motor terminals or across H-bridge MOSFETs to clamp inductive kickback during PWM switching. Use Value: Handles repetitive 20.5 A pulses at 0.01% duty cycle, eliminating need for snubber RC networks and reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Same VWM (15 V), lower PPPM (400 W), SMA package (surface-mount) | Requires PCB rework for SMT assembly; less robust mechanical mounting than axial DO-15 | Choose SMAJ15CA only when board space constraints prohibit through-hole components. |
| P6KE15CA | Same VWM (15 V), identical DO-15 package, but rated for 600 W PPPM and higher IPPM (27.5 A) | Higher clamping voltage (25.5 V) and larger thermal mass; suitable for higher-energy surge environments | Select P6KE15CA when system-level testing shows 500 W insufficient for IEC 61000-4-5 Level 5 compliance. |
Compared with SMAJ15CA and P6KE15CA, the SA15CAHE3/54 offers AEC-Q101 qualification and JESD 201 Class 2 whisker resistance out-of-the-box-critical for automotive and long-life industrial deployments-while delivering precise 24.4 V clamping at 20.5 A with proven DO-15 mechanical reliability.
Availability
SA15CAHE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card designs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SA15CAHE3/54 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, power handling, 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-including under-hood automotive, factory automation, and outdoor telecom infrastructure.
FAQ
What is the clamping voltage of the SA15CAHE3/54 under a 10/1000 μs surge?
The SA15CAHE3/54 clamps to a maximum of 24.4 V when subjected to its rated 20.5 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Figure 9 in the Vishay datasheet 88378 and represents the upper limit of voltage imposed on the protected circuit during worst-case transient events.
Is the SA15CAHE3/54 suitable for automotive applications?
Yes, the SA15CAHE3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its DO-15 package with JESD 201 Class 2 whisker resistance, –55 °C to +175 °C operating range, and validated performance under temperature cycling and HTRB testing make it appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability is critical.
Does the SA15CAHE3/54 have polarity markings?
No, the SA15CAHE3/54 is a bidirectional TVS diode and carries no polarity marking-there is no cathode band on the DO-15 package. Both leads are functionally identical, allowing unrestricted orientation during through-hole assembly without risk of reverse connection.
What is the maximum steady-state power dissipation for the SA15CAHE3/54?
The SA15CAHE3/54 dissipates up to 3.0 W continuously when mounted on an infinite heatsink at a lead temperature (TL) of 75 °C, as defined in Figure 5 of the datasheet. Derating is required above 75 °C TL, with full derating to zero power at 175 °C junction temperature.
How does the SA15CAHE3/54 differ from the unidirectional SA15AHE3/54?
The SA15CAHE3/54 is bidirectional with symmetric clamping in both directions and no polarity marking, whereas the SA15AHE3/54 is unidirectional, features a cathode band, and conducts only in reverse bias. The SA15CAHE3/54 has identical VWM (15 V), VBR (16.7–18.5 V), and VC (24.4 V), but lacks forward voltage (VF) specification since it blocks in both polarities.
SA15CAHE3/54 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 20.5A
- 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)
SA15CAHE3/54 FAQ
1.How can I place an order for SA15CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15CAHE3/54 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 SA15CAHE3/54 reliable?
The price and inventory of SA15CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA15CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15CAHE3/54?
SA15CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15CAHE3/54 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 SA15CAHE3/54?
For technical support, including SA15CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15CAHE3/54 requirements.
6.How does Aetrix verify that SA15CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA15CAHE3/54 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 SA15CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA15CAHE3/54?
All SA15CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA15CAHE3/54, 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 SA15CAHE3/54 part is unused and in its original packaging.
Return procedure for SA15CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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