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Vishay General Semiconductor - Diodes Division SA24HE3/54
- Part No.:
- SA24HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA24HE3/54.pdf
- Description:
- TVS DIODE 24VWM 43VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,460
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Product details
Overview
SA24HE3/54 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. It features 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V clamping voltage (VC) at 12.9 A peak pulse current, 500 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive electronics.
For engineers reviewing the SA24HE3/54 datasheet, SA24HE3/54 pinout, SA24HE3/54 application, or SA24HE3/54 equivalent, this part serves as a RoHS-compliant, lead-free, high-reliability TVS for automotive infotainment power inputs, industrial sensor I/O protection, and 24 V CAN bus transceiver rail clamping - with verified thermal derating to 175 °C junction temperature and JESD201 Class 2 whisker resistance.
Technical Context
The SA24HE3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1 ps) to transient events and low incremental surge resistance. Its uni-directional polarity uses a cathode band marking and supports reverse-biased clamping only - forward conduction is limited to 3.5 V at 100 A surge.
It is rated for 70 A non-repetitive forward surge current (IFSM, 10 ms half-sine), dissipates 3.0 W on infinite heatsink at TL = 75 °C, and exhibits +0.028 %/°C temperature coefficient of VBR. The device complies with AEC-Q101 stress test requirements and meets UL 94 V-0 flammability for its molded epoxy case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before clamping begins; sets protection threshold for 24 V nominal systems |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 1 mA - ensures reliable avalanche initiation within defined tolerance for consistent clamping onset |
| VC @ IPPM | 38.9 V at 12.9 A (10/1000 μs) - defines worst-case clamped voltage seen by protected ICs during surge events |
| PPPM | 500 W - peak transient energy absorption capability under standard 10/1000 μs waveform with 0.01 % duty cycle |
| IFSM | 70 A - withstands single 10 ms half-sine surge without failure; critical for load-dump immunity in automotive 24 V systems |
| TJ max | 175 °C - enables operation in under-hood automotive environments and high-ambient industrial enclosures |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by color band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry / reverse-biased reference node | Connected to system ground or low-side return path; establishes reference for clamping action |
| Cathode (banded end) | Clamping output / surge current sink | Connected to protected line (e.g., 24 V rail); conducts transient current to ground when VIN exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 500 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 Level 3 surges |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-defect reliability |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling and humidity, ensuring long-term solder joint integrity |
| UL 94 V-0 compliant molding compound | Meets flame-retardancy requirements for enclosed industrial and transportation equipment |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamping |
|---|---|
|
Use Scenario: Protecting 24 V supply input of vehicle infotainment head units against load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping element placed between battery rail and DC-DC converter input. Use Value: Limits voltage to ≤38.9 V during 12.9 A surge, preventing damage to downstream regulators rated for 40 V max input. |
Use Scenario: Shielding analog outputs of pressure sensors in factory automation PLC I/O modules from ESD and switching noise. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) shunt protector on 4–20 mA current loop outputs. Use Value: Responds in <1 ps to transients up to ±15 kV contact ESD (IEC 61000-4-2), preserving signal integrity and calibration stability. |
| 24 V CAN Bus Transceiver Rail Clamp | DC Motor Driver Gate Drive Protection |
|
Use Scenario: Safeguarding VCC pins of CAN FD transceivers (e.g., TCAN1042) in commercial vehicle telematics gateways. IC Role / Device Role / Timing Role: Secondary overvoltage clamp parallel to bulk capacitance on 24 V bias rail. Use Value: Clamps induced spikes from relay coil flyback or alternator ripple without affecting CAN signal timing or common-mode range. |
Use Scenario: Suppressing inductive kickback from brushed DC motor commutation in robotic actuator H-bridge drivers. IC Role / Device Role / Timing Role: Uni-directional TVS across motor terminals or high-side FET drain-source nodes. Use Value: Absorbs 500 W surges with 38.9 V clamping, preventing gate oxide rupture in MOSFETs rated for 40–60 V VDSS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3/A | Same VWM (24 V), lower PPPM (400 W), SMA package (surface-mount), no AEC-Q101 qualification | Preferred for space-constrained PCBs where reflow compatibility and footprint size outweigh automotive qualification needs | Select when board area is limited and automotive qualification is not required; verify thermal pad layout for 400 W dissipation |
| 1.5KE24A | Same VWM (24 V), higher IFSM (100 A), DO-201AD package (larger than DO-15), no AEC-Q101 or JESD201 Class 2 rating | Suitable for high-energy industrial AC/DC front-end protection where leaded ruggedness matters more than automotive compliance | Choose for legacy designs needing proven field reliability in non-automotive 24 V systems; confirm lead spacing matches DO-15 footprint |
Compared with SMAJ24AHE3/A and 1.5KE24A, SA24HE3/54 uniquely combines AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and DO-15 form factor - making it the only option certified for automotive under-hood deployment while maintaining through-hole assembly compatibility and 500 W surge capacity.
Availability
SA24HE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and 24 V DC motor control systems requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SA24HE3/54 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 application-specific performance.
The SAxxA series delivers standardized, high-power TVS diodes optimized for automotive, industrial, and telecom surge protection - engineered for rapid clamping, low leakage, and robust thermal performance in harsh environments.
FAQ
What is the clamping voltage of SA24HE3/54 at its rated peak pulse current?
The SA24HE3/54 has a maximum clamping voltage (VC) of 38.9 V at 12.9 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Figure 7 in the Vishay datasheet 88378 and defines the upper voltage limit imposed on protected circuits during surge events. The SA24HE3/54 maintains this clamping performance across its full operating temperature range and after repeated surge exposure.
Is SA24HE3/54 suitable for automotive applications?
Yes, SA24HE3/54 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 175 °C maximum junction temperature, JESD201 Class 2 whisker resistance, and validation across HTOL, temperature cycling, and mechanical shock tests confirm suitability for body control modules, infotainment systems, and telematics gateways. The SA24HE3/54 meets all stress requirements defined in the AEC-Q101-004 standard.
What does the "HE3" suffix indicate in SA24HE3/54?
The "HE3" suffix in SA24HE3/54 denotes RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. It distinguishes this variant from the commercial-grade "E3" version (e.g., SA24A-E3/54), which lacks automotive qualification and Class 2 tin whisker testing. The "54" refers to the preferred package code for 13-inch paper tape and reel packaging with 4000 units per reel.
How does SA24HE3/54 differ from bi-directional TVS diodes like SA24CA?
SA24HE3/54 is a uni-directional TVS diode with cathode marking and asymmetric conduction: it clamps only in reverse bias and conducts forward current up to 3.5 V at 100 A. In contrast, SA24CA is bi-directional, offering symmetrical clamping in both polarities with no polarity marking. SA24HE3/54 is used where DC polarity is fixed (e.g., 24 V supply rails), while SA24CA suits AC-coupled or floating signal lines like RS-485 or Ethernet PHYs.
What is the maximum steady-state power dissipation for SA24HE3/54?
The SA24HE3/54 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C, per Figure 5 in the Vishay datasheet. This rating decreases linearly above 75 °C and must be derated to 0 W at 175 °C junction temperature. For typical PCB mounting without heatsinking, design margin should assume ≤1.2 W continuous dissipation.
SA24HE3/54 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 11.6A
- 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)
SA24HE3/54 FAQ
1.How can I place an order for SA24HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA24HE3/54 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 SA24HE3/54 reliable?
The price and inventory of SA24HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA24HE3/54 is usually 5 days.
3.What payment methods are accepted for SA24HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA24HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA24HE3/54?
SA24HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA24HE3/54 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 SA24HE3/54?
For technical support, including SA24HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA24HE3/54 requirements.
6.How does Aetrix verify that SA24HE3/54 is sourced from the original manufacturer or authorized distributors?
All SA24HE3/54 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 SA24HE3/54 meets industry standards.
7.What is the process for return or replacement of SA24HE3/54?
All SA24HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA24HE3/54, 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 SA24HE3/54 part is unused and in its original packaging.
Return procedure for SA24HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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