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Vishay General Semiconductor - Diodes Division SA24CHE3/73
- Part No.:
- SA24CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA24CHE3/73.pdf
- Description:
- TVS DIODE 24VWM 43VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,320
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Product details
Overview
SA24CHE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), 12.9 A peak pulse current (IPPM), and 38.9 V maximum clamping voltage (VC) - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SA24CHE3/73 datasheet, SA24CHE3/73 pinout, SA24CHE3/73 application, or SA24CHE3/73 equivalent, this AEC-Q101 qualified, RoHS-compliant TVS diode offers verified bi-directional surge suppression with low incremental clamping resistance, fast response time, and stable performance across -55 °C to +175 °C junction temperature range.
Technical Context
The SA24CHE3/73 operates as a bi-directional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 µA at 24 V), while its DO-204AC package supports soldering per J-STD-002 and JESD 22-B102.
It delivers 500 W peak pulse power under standardized 10/1000 µs waveform with 0.01 % duty cycle, and exhibits 28 %/°C temperature coefficient of VBR, enabling predictable derating above 25 °C ambient per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - guaranteed avalanche onset range; ensures reliable triggering without premature conduction. |
| VC @ IPPM | 38.9 V at 12.9 A - maximum clamped voltage during 500 W transient; limits stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 500 W - peak pulse power handling capability with 10/1000 µs waveform; meets IEC 61000-4-5 Level 3 surge immunity requirements. |
| IPPM | 12.9 A - peak pulse current corresponding to 500 W clamping; determines minimum trace width and PCB layout robustness needed. |
| TJ max | +175 °C - maximum junction temperature; enables use 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 AEC standard. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0; matte tin-plated leads, no polarity marking for bi-directional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche terminals | No functional distinction - either lead serves as input/output; installed without orientation concern in AC-coupled or floating lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity constraints. |
| 500 W peak pulse power | Withstands repetitive 10/1000 µs surges up to 4 pulses/minute - sufficient for industrial motor drive I/O and telecom line protection. |
| Glass passivated junction | Ensures tight VBR tolerance (±5 %), low leakage (<1 µA), and long-term stability under thermal cycling and humidity stress. |
| AEC-Q101 qualification | Validates suitability for automotive body electronics, infotainment power supplies, and ADAS sensor interfaces requiring zero-failure reliability. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes let-through voltage during transients - critical for protecting 3.3 V or 5 V logic interfaced with 24 V field wiring. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers from inductive kickback and lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between field input and optocoupler/signal conditioner; responds within <1 ns to limit voltage to <39 V. Use Value: Prevents latch-up or gate oxide damage in upstream interface ICs, extending mean time between failures in harsh electromagnetic environments. |
Use Scenario: Safeguarding LIN bus transceivers and power window motor drivers in vehicle body control modules exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Bi-directional transient suppressor on 12 V/24 V supply rail and LIN data line; clamps bidirectional spikes without polarity dependency. Use Value: Meets ISO 7637-2 Pulse 1/2a/3a immunity requirements while maintaining signal integrity and avoiding false wake-up in low-power sleep modes. |
| RS-485 Communication Port | Smart Sensor Signal Conditioning |
|
Use Scenario: Protecting half-duplex RS-485 transceivers (e.g., MAX1487) connected to long cable runs in building automation networks. IC Role / Device Role / Timing Role: Differential-line TVS placed across A/B bus lines and ground; clamps common-mode and differential transients simultaneously. Use Value: Maintains signal eye diagram integrity by limiting overshoot to <39 V, preventing receiver saturation and bit errors during EMC testing. |
Use Scenario: Shielding analog output stages (e.g., 4–20 mA transmitter ICs) in pressure or temperature sensors deployed in oil & gas field equipment. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) bi-directional clamp on output loop, placed ahead of current-sense resistor and isolation barrier. Use Value: Preserves measurement accuracy by avoiding DC offset drift from leakage current while surviving 500 W surge events per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5A (Vishay) | Uni-directional; 24 V VWM, 26.7–29.5 V VBR, same PPPM and VC, but SMA package (surface-mount). | Requires polarity-aware layout; unsuitable for AC or floating lines without external biasing. | Select when board space is constrained and circuit topology guarantees unidirectional surge direction. |
| 1.5KE24CA (ON Semiconductor) | Same DO-204AC package and bi-directional function; 24 V VWM, 26.7–29.5 V VBR, but 1500 W PPPM and higher VC (43 V). | Higher clamping voltage increases risk to 3.3 V logic; better suited for 48 V industrial systems. | Choose only if system-level surge test levels exceed 500 W and board layout accommodates larger thermal mass. |
Compared with SMAJ24A-E3/5A and 1.5KE24CA, SA24CHE3/73 uniquely combines AEC-Q101 qualification, bi-directional symmetry, and optimized 38.9 V clamping in through-hole DO-15 - making it preferred for automotive and industrial field I/O where reliability, polarity independence, and precise voltage limiting are jointly required.
Availability
SA24CHE3/73 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, RS-485 communication ports, and smart sensor signal conditioning requiring stable component supply and long-lifecycle support.
Supply support for SA24CHE3/73 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 passive components with emphasis on reliability, efficiency, and automotive-grade qualification.
The SAxxCH series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, bi-directional transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What is the polarity configuration of SA24CHE3/73?
The SA24CHE3/73 is a bi-directional TVS diode with symmetrical avalanche characteristics in both directions; it has no cathode marking and may be installed in either orientation on the PCB. This eliminates polarity-checking during assembly and simplifies design for AC-coupled or floating signal paths - a key advantage over uni-directional alternatives like SA24A or SMAJ24A.
Does SA24CHE3/73 meet automotive reliability standards?
Yes, SA24CHE3/73 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. Its DO-204AC package with HE3 suffix confirms compliance to JESD 201 Class 2 whisker resistance - making SA24CHE3/73 suitable for under-hood and body electronics applications where zero-field failure is required.
What is the maximum clamping voltage of SA24CHE3/73 at rated surge current?
The SA24CHE3/73 clamps to a maximum of 38.9 V when subjected to its rated 12.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 7 in the datasheet and represents the worst-case voltage seen by protected circuitry - critical for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream.
How does SA24CHE3/73 differ from SA24A in practical use?
SA24CHE3/73 is bi-directional and AEC-Q101 qualified, whereas SA24A is uni-directional and commercial-grade. In practice, SA24CHE3/73 protects both positive and negative transients without polarity constraints and is approved for automotive use; SA24A requires correct cathode orientation and lacks automotive qualification - limiting it to non-safety-critical consumer or lab equipment.
Can SA24CHE3/73 be used in place of a 24 V Zener diode for overvoltage protection?
No - SA24CHE3/73 is not a regulating Zener diode; it is a transient suppressor optimized for short-duration, high-energy surges (e.g., ESD, inductive kick). It does not regulate steady-state voltage and exhibits high leakage above VWM. For continuous overvoltage regulation, a dedicated shunt regulator or LDO is required; SA24CHE3/73 must be used exclusively for surge protection in parallel with the protected node.
SA24CHE3/73 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:
- -
- Bidirectional Channels:
- 1
- 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)
SA24CHE3/73 FAQ
1.How can I place an order for SA24CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA24CHE3/73 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 SA24CHE3/73 reliable?
The price and inventory of SA24CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA24CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA24CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA24CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA24CHE3/73?
SA24CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA24CHE3/73 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 SA24CHE3/73?
For technical support, including SA24CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA24CHE3/73 requirements.
6.How does Aetrix verify that SA24CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA24CHE3/73 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 SA24CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA24CHE3/73?
All SA24CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA24CHE3/73, 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 SA24CHE3/73 part is unused and in its original packaging.
Return procedure for SA24CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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