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Vishay General Semiconductor - Diodes Division SA15CHE3/73
- Part No.:
- SA15CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA15CHE3/73.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,804
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Product details
Overview
SA15CHE3/73 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive-grade reliability. It protects signal lines and power rails in sensor units and microcontroller interfaces against ESD and inductive switching transients.
For engineers reviewing the SA15CHE3/73 datasheet, SA15CHE3/73 pinout, SA15CHE3/73 application, or SA15CHE3/73 equivalent, key selection criteria include clamping voltage (24.4 V at 20.5 A), low leakage (<1.0 μA at 15 V), junction temperature range (–55 °C to +175 °C), and RoHS-compliant matte tin-plated leads meeting J-STD-002 solderability standards.
Technical Context
This bi-directional TVS operates symmetrically in both polarities with identical electrical characteristics-no polarity marking on the device-and delivers consistent clamping performance across reverse and forward surge events. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive 10/1000 μs transients at 0.01% duty cycle.
The SA15CHE3/73 is thermally rated for 3.0 W steady-state power dissipation on an infinite heatsink at TL = 75 °C and supports peak forward surge current up to 70 A (10 ms half-sine), though clamping data applies only to reverse-biased operation per standard TVS test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin below breakdown. |
| VBR (min/max) | 16.7 V / 18.5 V at 1.0 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 24.4 V at 20.5 A - Clamped voltage during 500 W transient; determines maximum stress imposed on protected IC inputs. |
| ID @ VWM | <1.0 μA - Ultra-low reverse leakage; avoids signal integrity degradation or battery drain in always-on circuits. |
| PPPM | 500 W (10/1000 μs) - Peak surge handling capacity; meets IEC 61000-4-5 Level 4 immunity requirements. |
| TJ Range | –55 °C to +175 °C - Full automotive-grade junction temperature range; enables under-hood and engine-control module deployment. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with UL 94 V-0 molded epoxy; compatible with legacy through-hole assembly. |
Pinout & Package
SA15CHE3/73 is a two-terminal bi-directional TVS diode in DO-204AC (DO-15) package with no polarity marking. Both leads are electrically symmetrical and interchangeable; neither functions as anode or cathode in normal operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both) | Bi-directional surge path terminal | Provides identical clamping in either polarity; connected across protected line and ground (or rail-to-rail). |
| Lead 1 / Lead 2 | Matte tin-plated copper alloy | Solderable per J-STD-002; withstands 275 °C dip for 10 s; meets JESD 201 Class 2 whisker resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor protection. |
| 500 W peak pulse rating | Handles high-energy transients from inductive load switching (e.g., solenoids, relays) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage overshoot during clamping-critical for safeguarding 3.3 V or 5 V logic interfaces. |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualification and JESD 201 Class 2 whisker resistance-required for automotive production traceability. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between signal line and chassis ground to limit transient excursions to ≤24.4 V. Use Value: Prevents latch-up or permanent damage to 5 V tolerant transceivers while maintaining signal fidelity during 10/1000 μs surges up to 20.5 A. | Use Scenario: Shielding digital input modules in programmable logic controllers from field-induced surges caused by relay coil de-energization. IC Role / Device Role / Timing Role: Parallel-connected TVS across 24 V DC input terminals to absorb inductive kickback energy before it reaches optocoupler inputs. Use Value: Enables >100,000 switching cycles without degradation, thanks to 500 W pulse rating and 175 °C max junction temperature. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Safeguarding primary-side controller ICs and rectifier bridges in AC/DC adapters against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across bridge rectifier output to clamp differential-mode transients before bulk capacitor. Use Value: Maintains 15 V VWM margin above nominal 12 V DC bus, ensuring no false triggering during brownout or ripple conditions. | Use Scenario: Protecting Ethernet PHY front-end circuitry (e.g., magnetics, transformer center taps) from induced surges on unshielded twisted-pair lines. IC Role / Device Role / Timing Role: Bi-directional clamp referenced to local ground on each differential pair to suppress common-mode transients. Use Value: Delivers <1.0 μA leakage at 15 V, avoiding bias current errors in precision termination networks and preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient 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 layout; unsuitable for through-hole legacy designs. | Select when board space is constrained and automated assembly is preferred. |
| 1.5KE15CA | Same VWM (15 V), higher PPPM (1500 W), DO-201AD package (larger axial) | Higher clamping voltage (24.4 V vs. 25.5 V) and larger footprint; better for high-energy industrial surges. | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 requirements. |
Compared with SMAJ15CA and 1.5KE15CA, SA15CHE3/73 offers AEC-Q101 qualification and DO-15 compatibility-making it the preferred choice for automotive OEMs requiring traceable, through-hole TVS devices with validated reliability under thermal and mechanical stress.
Availability
SA15CHE3/73 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply with full AEC-Q101 compliance and RoHS traceability.
Supply support for SA15CHE3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SAxxCH series is part of Vishay's TRANSZORB® TVS platform designed specifically for robust, bi-directional transient suppression in harsh environments-including under-hood automotive, factory automation, and outdoor telecom infrastructure.
FAQ
What is the clamping voltage of SA15CHE3/73 at its rated peak pulse current?
The SA15CHE3/73 has a maximum clamping voltage (VC) of 24.4 V at its peak pulse current (IPPM) of 20.5 A, measured using the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 500 W transient event and is critical for ensuring downstream ICs remain within absolute maximum ratings. The SA15CHE3/73 maintains this clamping performance bidirectionally due to its symmetrical construction.
Is SA15CHE3/73 suitable for automotive applications?
Yes, SA15CHE3/73 is AEC-Q101 qualified and carries the HE3 suffix, indicating compliance with automotive stress tests including temperature cycling, humidity bias, and mechanical shock. Its –55 °C to +175 °C operating junction temperature range, matte tin-plated leads qualified to JESD 201 Class 2, and DO-15 package with UL 94 V-0 molding compound make it suitable for engine control units, body control modules, and ADAS sensor interfaces. SA15CHE3/73 is explicitly listed in Vishay's AEC-Q101 certified product table.
How does the bi-directional nature of SA15CHE3/73 affect its circuit placement?
The SA15CHE3/73 has no polarity marking and behaves identically in both directions, so it can be placed across any two nodes where transient suppression is needed-such as line-to-ground, rail-to-rail, or differential signal pairs-without orientation concerns. Unlike uni-directional TVS diodes, it requires no cathode alignment and simplifies layout in balanced or AC-coupled paths. This symmetry is confirmed in the datasheet's "Electrical Characteristics" table, where VBR and VC values are specified identically for both polarities.
What is the maximum reverse leakage current for SA15CHE3/73 at its stand-off voltage?
The SA15CHE3/73 exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated stand-off voltage (VWM) of 15 V and ambient temperature of 25 °C. This ultra-low leakage ensures minimal impact on high-impedance sensor bias networks or battery-powered circuits, supporting long-term reliability in always-on systems. Leakage remains well below 10 μA even at elevated temperatures up to 85 °C, as verified in Vishay's derating curves.
Does SA15CHE3/73 require a heatsink for continuous power dissipation?
No, SA15CHE3/73 is not intended for continuous power dissipation; its 3.0 W rating applies only to steady-state conditions on an infinite heatsink at lead temperature (TL) of 75 °C-used for thermal design margining, not operational bias. In practice, the device operates in transient clamp mode with very low duty cycle (0.01%), so average power remains negligible. No external heatsink is required, and thermal design focuses on PCB copper area for short-duration pulse energy absorption, not sustained conduction.
SA15CHE3/73 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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)
SA15CHE3/73 FAQ
1.How can I place an order for SA15CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15CHE3/73 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 SA15CHE3/73 reliable?
The price and inventory of SA15CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA15CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15CHE3/73?
SA15CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15CHE3/73 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 SA15CHE3/73?
For technical support, including SA15CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15CHE3/73 requirements.
6.How does Aetrix verify that SA15CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA15CHE3/73 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 SA15CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA15CHE3/73?
All SA15CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA15CHE3/73, 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 SA15CHE3/73 part is unused and in its original packaging.
Return procedure for SA15CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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