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Vishay General Semiconductor - Diodes Division SA24CAHE3/54
- Part No.:
- SA24CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA24CAHE3/54.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,584
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Product details
Overview
SA24CAHE3/54 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 500 W peak pulse power (10/1000 μs), 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR at 1 mA), 12.9 A peak pulse current (IPPM), and 38.9 V maximum clamping voltage (VC) - used to protect MOSFETs and sensor interfaces in automotive ECUs.
For engineers reviewing the SA24CAHE3/54 datasheet, SA24CAHE3/54 pinout, SA24CAHE3/54 application, or SA24CAHE3/54 equivalent, this AEC-Q101 qualified TVS offers verified bidirectional surge suppression with low clamping ratio, RoHS-compliant matte tin leads, and DO-15 mechanical compatibility for board-level ESD and load-dump protection in industrial and automotive designs.
Technical Context
The SA24CAHE3/54 operates as a symmetrical avalanche diode with identical electrical characteristics in both directions, enabling robust protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while its 175 °C max junction temperature supports under-hood automotive deployment.
Designed for repetitive 10/1000 μs surge waveforms at 0.01% duty cycle, it delivers consistent clamping performance up to 500 W peak pulse power. The device exhibits a +28 mV/°C temperature coefficient of VBR, enabling predictable voltage shift across operating temperature ranges without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin for 24 V rail protection. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage. |
| VC @ IPPM | 38.9 V at 12.9 A - Clamped voltage during full-rated surge; limits downstream IC stress to safe levels. |
| PPPM | 500 W (10/1000 μs) - Peak transient energy handling capacity; meets ISO 7637-2 Pulse 1/2/5a requirements. |
| IPPM | 12.9 A - Maximum non-repetitive surge current; determines minimum series impedance needed for compliance. |
| TJ max | 175 °C - Enables operation in high-temperature environments such as engine control modules. |
| Leakage ID | <1.0 μA at 24 V - Negligible standby power loss; critical for battery-powered sensor nodes. |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with axial leads; no polarity marking for bidirectional configuration; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between leads; either terminal serves as input/output for transient energy diversion. |
| Lead 1 | Current path to PCB trace or ground plane | Provides low-inductance path to shunt surge current away from protected circuit node. |
| Lead 2 | Current path to reference node (e.g., chassis ground or power return) | Completes low-impedance clamp loop; layout must minimize loop area to preserve response speed. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD47. |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift over 15+ year service life in harsh environments. |
| 500 W peak pulse rating (10/1000 μs) | Supports protection against ISO 16750-2 load dump surges up to 35 V for ≥40 ms without degradation. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge). |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed enclosures, satisfying IEC 62368-1 end-equipment safety requirements. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver lines from alternator load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and chassis ground to limit voltage excursion to ≤38.9 V during 12 V system surges. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic interfaces while maintaining signal integrity during normal operation. | Use Scenario: Safeguarding 24 V DC digital input terminals against field-wiring induced transients and relay coil flyback. IC Role / Device Role / Timing Role: Primary front-end surge suppressor mounted directly at connector entry point, clamping transients before optocoupler input stage. Use Value: Eliminates need for additional RC snubbers or varistors, reducing BOM count and PCB footprint by 30% in DIN-rail mounted I/O modules. |
| Consumer Appliance Motor Drive Board | Telecom Base Station Power Monitoring Circuit |
Use Scenario: Shielding MCU analog-to-digital converter inputs from brush-commutator noise and PWM-induced coupling in washing machine motor controllers. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) bidirectional TVS placed adjacent to ADC input pins to suppress sub-100 ns ringing without signal distortion. Use Value: Maintains <±0.5 LSB measurement accuracy under EFT burst conditions (IEC 61000-4-4 Level 4), avoiding firmware recalibration cycles. | Use Scenario: Securing 48 V DC power rail monitoring ICs against lightning-induced surges entering via outdoor cabling in remote radio units. IC Role / Device Role / Timing Role: Secondary overvoltage clamp staged after primary MOV protection, providing precise 38.9 V ceiling to prevent false undervoltage lockout. Use Value: Extends mean time between failures (MTBF) of power management ASICs by 4.2× compared to unclamped designs per Telcordia SR-332. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Same VWM (24 V), lower PPPM (400 W), SMA package (surface-mount) | Requires rework for SMT assembly; unsuitable for through-hole legacy boards | Select when board space is constrained and automated placement is available. |
| P6SMB24CA | Same VWM (24 V), identical PPPM (500 W), DO-214AA package (SMB) | Larger footprint than DO-15; higher thermal resistance limits sustained surge duty | Choose for higher IFSM tolerance (100 A vs. 70 A) in infrequent high-energy events. |
Compared with SMAJ24CA and P6SMB24CA, the SA24CAHE3/54 provides AEC-Q101 qualification and DO-15 through-hole compatibility - making it the preferred choice for automotive replacement modules and industrial retrofits where leaded reliability and legacy board support are mandatory.
Availability
SA24CAHE3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input protection, and telecom power monitoring systems requiring stable component supply with long lifecycle assurance.
Supply support for SA24CAHE3/54 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 and automotive qualification.
The SAxxCA series targets board-level transient suppression in demanding environments, with design focus on AEC-Q101 compliance, low clamping voltage, and robust surge endurance for 12 V/24 V systems.
FAQ
What is the maximum clamping voltage of the SA24CAHE3/54 under rated surge conditions?
The SA24CAHE3/54 has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated 12.9 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is measured per Figure 9 in Vishay document 88378 and ensures protected circuits remain below critical overvoltage thresholds during ISO 7637-2 Pulse 5a events. The SA24CAHE3/54 maintains this clamping performance across its full operating temperature range.
Is the SA24CAHE3/54 suitable for automotive applications?
Yes, the SA24CAHE3/54 is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body control modules, and ADAS sensor interfaces. Its DO-15 package, 175 °C junction rating, and validated performance under load dump and EFT stress make it compliant with ISO 16750-2 and ISO 7637-2 requirements. The SA24CAHE3/54 carries the HE3 suffix denoting AEC-Q101 qualification per Vishay's ordering nomenclature.
How does the bidirectional nature of the SA24CAHE3/54 affect its circuit placement?
The SA24CAHE3/54 has no polarity marking and identical electrical behavior in both directions, allowing placement across any two nodes requiring symmetric overvoltage protection - such as differential signal pairs, AC power inputs, or floating sensor bridges. Unlike unidirectional TVS diodes, the SA24CAHE3/54 eliminates orientation errors during manual assembly and supports protection of bidirectional communication lines like RS-485 without external diode steering networks.
What is the leakage current specification for the SA24CAHE3/54 at its rated stand-off voltage?
At its 24 V stand-off voltage (VWM), the SA24CAHE3/54 exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, per Table on page 2 of Vishay document 88378. This ultra-low leakage ensures minimal power drain in always-on systems such as automotive telematics modules and enables direct integration into battery-backed sensor circuits without compromising runtime. The SA24CAHE3/54 maintains leakage below 5 μA up to 125 °C.
Can the SA24CAHE3/54 replace older SA24A variants in existing designs?
No - the SA24CAHE3/54 is a bidirectional device (CA suffix), whereas SA24A is unidirectional and features a cathode band. Substituting SA24CAHE3/54 for SA24A would eliminate polarity-dependent forward conduction capability and may compromise protection in DC-biased circuits. For unidirectional replacement, use SA24AHE3/54; for bidirectional upgrades, verify system symmetry and confirm absence of DC bias across the TVS location before deploying SA24CAHE3/54.
SA24CAHE3/54 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 12.9A
- 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)
SA24CAHE3/54 FAQ
1.How can I place an order for SA24CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA24CAHE3/54 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 SA24CAHE3/54 reliable?
The price and inventory of SA24CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA24CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA24CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA24CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA24CAHE3/54?
SA24CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA24CAHE3/54 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 SA24CAHE3/54?
For technical support, including SA24CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA24CAHE3/54 requirements.
6.How does Aetrix verify that SA24CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA24CAHE3/54 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 SA24CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA24CAHE3/54?
All SA24CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA24CAHE3/54, 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 SA24CAHE3/54 part is unused and in its original packaging.
Return procedure for SA24CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA24CAHE3/54 Tags
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