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Vishay General Semiconductor - Diodes Division SA24-E3/73
- Part No.:
- SA24-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA24-E3/73.pdf
- Description:
- TVS DIODE 24VWM 43VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,938
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Product details
Overview
SA24-E3/73 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 a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1.0 mA, 38.9 V maximum clamping voltage (VC) at 12.9 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA24-E3/73 datasheet, SA24-E3/73 pinout, SA24-E3/73 application, or SA24-E3/73 equivalent, this device is selected for robust ESD and surge protection in 24 V industrial control inputs, automotive body electronics, and DC-DC converter input stages where fast response (<1 ns), low clamping ratio, and high surge current tolerance are critical.
Technical Context
The SA24-E3/73 operates as a uni-directional avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transients. Its clamping behavior is defined by a 10/1000 µs waveform test condition, with VC = 38.9 V at IPPM = 12.9 A and incremental surge resistance < 3.0 Ω - ensuring predictable voltage limiting during repetitive surges up to 0.01% duty cycle.
Thermal performance is governed by a 175 °C maximum junction temperature and 3.0 W steady-state power dissipation on infinite heatsink at TL = 75 °C. Polarity is marked by a cathode band; it supports soldering per J-STD-002 and JESD 22-B102, with matte tin-plated leads passing JESD 201 Class 1A whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before significant leakage; sets protection threshold for 24 V nominal systems. |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage. |
| VC @ IPPM | 38.9 V at 12.9 A (10/1000 µs) - Clamped voltage seen by protected circuit during worst-case surge; defines safe margin for downstream ICs. |
| PPPM | 500 W - Peak transient energy handling capability; sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges. |
| IFSM | 70 A (10 ms half-sine) - Surge current rating for non-repetitive forward events; supports inrush and load-dump immunity. |
| TJmax | 175 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with UL 94 V-0 molded epoxy; compatible with automated through-hole assembly. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, cylindrical epoxy body with cathode band marking on one end. Leads are matte tin-plated, solderable per J-STD-002, and rated for 275 °C / 10 s solder dip.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during forward surge or fault conditions. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail); avalanches into conduction when voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under thermal cycling and humidity stress. |
| 500 W peak pulse power (10/1000 µs) | Supports high-energy transients without degradation; validated for repetitive 0.01% duty cycle operation. |
| AEC-Q101 qualified | Meets automotive-grade stress testing (HTOL, TC, UHAST, etc.), qualifying SA24-E3/73 for under-hood and chassis applications. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to protected ICs - e.g., 38.9 V clamp vs. 28.1 V typical VBR yields only 39% overshoot. |
| JESD 201 Class 1A whisker resistance | Prevents tin whisker growth in high-reliability assemblies, eliminating risk of latent short circuits in long-life deployments. |
Applications
| Industrial PLC Input Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary clamping element placed between field input and optocoupler/signal conditioner input. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to 30 V-rated interface ICs while surviving repeated 12.9 A surges per IEC 61000-4-4. |
Use Scenario: Power supply input to BCM microcontroller and CAN transceiver modules subjected to load dump and jump-start events. IC Role / Device Role / Timing Role: First-line overvoltage suppressor on main 24 V battery feed, upstream of DC-DC converters and LDOs. Use Value: Clamps 500 W surges within 1 ns, maintaining downstream rail integrity below 40 V and meeting ISO 16750-2 load dump requirements. |
| DC-DC Converter Input Stage | Factory Automation Sensor Interface |
|
Use Scenario: Input protection for isolated 24 V-to-5 V/3.3 V DC-DC modules powering industrial sensors and actuators. IC Role / Device Role / Timing Role: Standoff device parallel to input capacitor, absorbing switching noise and external EFT bursts. Use Value: Withstands 70 A non-repetitive forward surge (IFSM), protecting converter MOSFETs and gate drivers during input fault conditions. |
Use Scenario: Signal line protection for 24 V two-wire current-loop (4–20 mA) sensors connected to analog input cards. IC Role / Device Role / Timing Role: Bi-directional-capable variant not used; SA24-E3/73 applied in uni-directional configuration across sensor supply and return. Use Value: 24 V VWM aligns precisely with sensor supply tolerance, minimizing leakage (<1.0 µA) while providing >10× surge margin over normal operating voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5T | Same VWM (24 V), but SMA package (SMD); lower IPPM (12.3 A) and VC (38.9 V); 400 W PPPM. | Designed for space-constrained PCB layouts; lacks AEC-Q101 qualification and axial lead mechanical robustness. | Select for high-density SMT designs where board space is limited and automotive qualification is not required. |
| 1.5KE24A | Same VWM (24 V), DO-201 package; higher PPPM (1500 W), but larger footprint and no AEC-Q101 rating. | Higher surge capacity suits heavy industrial equipment; lacks whisker-resistant plating and automotive thermal cycling validation. | Select for non-automotive 24 V systems requiring >500 W surge handling and where DO-201 mounting is acceptable. |
Compared with SMAJ24A-E3/5T and 1.5KE24A, the SA24-E3/73 uniquely combines AEC-Q101 qualification, JESD 201 Class 1A whisker resistance, and DO-15 mechanical ruggedness - making it the preferred choice for automotive and long-life industrial through-hole deployments where reliability under thermal and mechanical stress is non-negotiable.
Availability
SA24-E3/73 is available at Aetrix Electronics and suitable for industrial PLC input protection, automotive body control modules, and DC-DC converter input stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for SA24-E3/73 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 optimization.
The SAxx series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust transient suppression in automotive, industrial, and telecom power and signal lines - balancing clamping performance, surge endurance, and qualification compliance.
FAQ
What is the maximum clamping voltage of the SA24-E3/73 under standard test conditions?
The SA24-E3/73 has a maximum clamping voltage (VC) of 38.9 V when subjected to a 10/1000 µs waveform at IPPM = 12.9 A. This value is measured per JEDEC standards and reflects the peak voltage imposed on the protected circuit during worst-case transient events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.
Is the SA24-E3/73 suitable for automotive applications?
Yes, the SA24-E3/73 is AEC-Q101 qualified and manufactured with JESD 201 Class 1A whisker-resistant plating, making it suitable for automotive body electronics, infotainment power supplies, and BCM interfaces. Its 175 °C TJmax, DO-15 mechanical robustness, and validated surge performance meet ISO 16750-2 and ISO 7637-2 requirements - confirmed in Vishay's official qualification report for the SAxx-E3/73 series.
What does the "E3/73" suffix indicate in SA24-E3/73?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD 201 Class 1A whisker testing. The "/73" specifies packaging: 73 means 13" diameter paper tape and reel, with 4000 units per reel - consistent with Vishay's standard ordering code for DO-15 devices per document 88378 revision 18-Sep-12.
How does the SA24-E3/73 differ from bi-directional variants like SA24CA?
The SA24-E3/73 is uni-directional, with a cathode band marking and forward conduction capability (IFSM = 70 A), whereas SA24CA is bi-directional, unmarked, and blocks in both directions. SA24-E3/73 provides lower forward voltage drop and higher surge current rating in forward bias - ideal for DC rail protection - while SA24CA suits AC-coupled or floating signal lines where polarity is undefined.
What is the thermal derating behavior of the SA24-E3/73 above 25 °C ambient?
The SA24-E3/73 follows a linear derating curve for steady-state power dissipation: PD decreases from 3.0 W at TL = 75 °C to zero at TL = 175 °C, per Figure 5 in Vishay document 88378. For junction temperature, derating begins above 25 °C ambient per Figure 2 - e.g., at 100 °C ambient, peak pulse power is reduced to ~60% of 500 W to maintain TJ ≤ 175 °C.
SA24-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA24-E3/73 FAQ
1.How can I place an order for SA24-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA24-E3/73 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 SA24-E3/73 reliable?
The price and inventory of SA24-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA24-E3/73 is usually 5 days.
3.What payment methods are accepted for SA24-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA24-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA24-E3/73?
SA24-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA24-E3/73 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 SA24-E3/73?
For technical support, including SA24-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA24-E3/73 requirements.
6.How does Aetrix verify that SA24-E3/73 is sourced from the original manufacturer or authorized distributors?
All SA24-E3/73 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 SA24-E3/73 meets industry standards.
7.What is the process for return or replacement of SA24-E3/73?
All SA24-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA24-E3/73, 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 SA24-E3/73 part is unused and in its original packaging.
Return procedure for SA24-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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