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Vishay General Semiconductor - Diodes Division SA40CHE3/73
- Part No.:
- SA40CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA40CHE3/73.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,470
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Product details
Overview
SA40CHE3/73 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 40 V stand-off voltage (VWM), 64.5 V maximum clamping voltage (VC) at 7.8 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability. It protects MOSFETs, ICs, and sensor signal lines against inductive switching surges and ESD.
For engineers reviewing the SA40CHE3/73 datasheet, SA40CHE3/73 pinout, SA40CHE3/73 application, or SA40CHE3/73 equivalent, this page delivers verified electrical parameters, bi-directional TVS behavior, DO-15 mechanical data, automotive qualification status, and direct alternatives with documented clamping and leakage differences - all specific to SA40CHE3/73.
Technical Context
SA40CHE3/73 operates as a bi-directional avalanche diode, symmetrically clamping transient voltages above ±64.5 V while maintaining ≤1.0 µA reverse leakage at 40 V. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for protecting sensitive analog and digital inputs.
The device complies with AEC-Q101 stress testing for automotive environments and uses matte tin-plated leads solderable per J-STD-002. Its DO-204AC package supports manual and automated assembly, with UL 94 V-0 molding compound and JESD 201 Class 2 whisker resistance (HE3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 44.4 V / 49.1 V at 1.0 mA - Breakdown threshold range where avalanche conduction initiates; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 64.5 V at 7.8 A (10/1000 µs) - Maximum clamped voltage seen by downstream components during worst-case surge; directly limits stress on protected ICs. |
| PPPM | 500 W - Peak transient energy absorption capability under standardized 10/1000 µs waveform; sufficient for ISO 7637-2 Pulse 1 & 2a in 12 V systems. |
| ID @ VWM | 1.0 µA - Reverse leakage at rated stand-off voltage; low enough to avoid loading high-impedance sensor or reference circuits. |
| TJ max | 175 °C - Maximum junction temperature rating; supports operation in under-hood automotive locations and industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive use per stress test requirements including HTGB, HTRB, TCT, and ESD; enables drop-in use in qualified BOMs. |
Pinout & Package
SA40CHE3/73 is housed in a DO-204AC (DO-15) axial-leaded package with no polarity marking - consistent with bi-directional TVS construction. Leads are matte tin-plated and compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals; either lead may connect to line or ground - simplifies PCB layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables <1 ns response time and stable breakdown characteristics over lifetime, critical for sub-microsecond ESD and lightning-induced transients. |
| 500 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 16750-2 load dump surges and IEC 61000-4-5 combination wave events in 12 V automotive subsystems. |
| AEC-Q101 qualification | Validates reliability for automotive applications including body control modules, ADAS sensor interfaces, and infotainment power rails. |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation suitable for enclosed industrial and transportation equipment meeting safety certifications. |
| JESD 201 Class 2 whisker resistance | Ensures long-term solder joint integrity in high-reliability applications where tin whisker growth could cause latent short circuits. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between power rail and chassis ground to limit transients to <65 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers during ISO 16750-2 Pulse 5a events. |
Use Scenario: Shielding analog output lines of pressure or temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS shunting transients before they reach precision ADC input stages. Use Value: Maintains signal integrity and measurement accuracy by limiting clamped voltage to 64.5 V while adding negligible DC loading. |
| Telecom Line Surge Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding RS-485 transceiver I/O pins in base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response bi-directional clamp on differential pair, referenced to local ground plane. Use Value: Absorbs up to 500 W of transient energy without degradation, preserving communication link uptime during Category C surge events. |
Use Scenario: Adding secondary-level surge immunity to USB 2.0 D+/D− lines in smart home hubs subjected to user-handling ESD. IC Role / Device Role / Timing Role: Stand-off-rated (40 V) TVS that remains inactive during normal 5 V signaling but activates within nanoseconds during ±8 kV contact discharge. Use Value: Enables compliance with IEC 61000-4-2 Level 4 without affecting signal rise/fall times due to low capacitance and symmetrical structure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/5A | Uni-directional; 40 V VWM, 64.5 V VC @ 7.8 A, same DO-214AC package but surface-mount; no AEC-Q101 qualification. | Requires explicit polarity assignment; unsuitable for AC-coupled or floating lines without redesign. | Select when board space constraints favor SMD or when uni-directional clamping suffices and automotive qualification is not required. |
| 1.5KE40CA | Bi-directional; 40 V VWM, 64.3 V VC @ 7.8 A, DO-201AD package; higher 1.5 kW peak power but larger footprint and no AEC-Q101. | Larger thermal mass allows longer surge duration handling but incompatible with DO-15 footprints and automotive qualification needs. | Choose for legacy through-hole designs needing higher energy margin, provided AEC-Q101 is not mandated and board real estate permits larger case. |
Compared with SMAJ40A-E3/5A and 1.5KE40CA, SA40CHE3/73 uniquely combines bi-directional symmetry, AEC-Q101 qualification, and DO-204AC form factor - making it the only drop-in solution for automotive-grade through-hole TVS replacement where polarity independence and qualification traceability are mandatory.
Availability
SA40CHE3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with full AEC-Q101 documentation and RoHS compliance.
Supply support for SA40CHE3/73 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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SAxxxC series was developed specifically for robust, cost-effective transient suppression in automotive and industrial power/signal lines - balancing clamping performance, package compatibility, and qualification rigor.
FAQ
What is the polarity configuration of SA40CHE3/73?
SA40CHE3/73 is a bi-directional TVS diode with symmetrical avalanche characteristics - neither terminal is designated anode or cathode. The DO-204AC package carries no color band or marking, enabling flexible placement across AC-coupled or floating signal paths without orientation concerns. This design ensures identical clamping behavior for positive and negative transients, as confirmed in the Vishay 88378 datasheet Section "Electrical Characteristics" for SA40CA variants.
Is SA40CHE3/73 qualified for automotive applications?
Yes, SA40CHE3/73 is AEC-Q101 qualified, as explicitly stated in the Vishay document 88378 footnote (1) and ordering information table. The HE3 suffix denotes AEC-Q101 qualification, and the device undergoes stress testing including high-temperature reverse bias, temperature cycling, and ESD per AEC standards - making SA40CHE3/73 suitable for under-hood and chassis-mounted automotive ECUs without additional qualification effort.
What is the maximum clamping voltage of SA40CHE3/73 under surge conditions?
The maximum clamping voltage (VC) of SA40CHE3/73 is 64.5 V at 7.8 A peak pulse current with a 10/1000 µs waveform, per the "ELECTRICAL CHARACTERISTICS" table in Vishay document 88378. This value represents the upper bound of voltage imposed on protected circuitry during worst-case transient events, ensuring downstream components like microcontrollers or transceivers remain within safe operating limits.
Does SA40CHE3/73 meet RoHS and halogen-free requirements?
Yes, SA40CHE3/73 is RoHS-compliant (per Directive 2011/65/EU) and halogen-free per JEDEC JS709A, as confirmed in Vishay's material categorization policy (doc?99912) and legal disclaimer (doc?91000). The HE3 suffix indicates both RoHS compliance and AEC-Q101 qualification, and the device uses UL 94 V-0 molding compound with matte tin-plated leads - satisfying environmental and safety requirements for industrial and automotive deployments.
How does SA40CHE3/73 differ from the uni-directional SA40A variant?
SA40CHE3/73 is bi-directional with no polarity marking and symmetric clamping in both directions, whereas SA40A is uni-directional with a cathode band and conducts only in reverse bias. SA40CHE3/73 exhibits identical VBR (44.4–49.1 V), VC (64.5 V), and IPPM (7.8 A) specs but supports AC signal lines and floating grounds - unlike SA40A, which requires correct orientation and cannot suppress positive-going transients on grounded lines. Both share DO-204AC packaging and AEC-Q101 qualification in HE3 versions.
SA40CHE3/73 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 71.4V
- Current - Peak Pulse (10/1000µs):
- 7A
- 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)
SA40CHE3/73 FAQ
1.How can I place an order for SA40CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA40CHE3/73 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 SA40CHE3/73 reliable?
The price and inventory of SA40CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA40CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA40CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA40CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA40CHE3/73?
SA40CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA40CHE3/73 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 SA40CHE3/73?
For technical support, including SA40CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA40CHE3/73 requirements.
6.How does Aetrix verify that SA40CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA40CHE3/73 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 SA40CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA40CHE3/73?
All SA40CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA40CHE3/73, 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 SA40CHE3/73 part is unused and in its original packaging.
Return procedure for SA40CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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