My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SA40CHE3/54
- Part No.:
- SA40CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA40CHE3/54.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,135
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA40CHE3/54 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 a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 64.5 V maximum clamping voltage (VC) at 7.8 A peak pulse current, and 500 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SA40CHE3/54 datasheet, SA40CHE3/54 pinout, SA40CHE3/54 application, or SA40CHE3/54 equivalent, this AEC-Q101 qualified, RoHS-compliant TVS diode offers verified bi-directional surge suppression, low clamping ratio (VC/VBR ≈ 1.38), and stable performance across -55 °C to +175 °C junction temperature range.
Technical Context
The SA40CHE3/54 operates as a bi-directional avalanche diode, symmetrically clamping both positive and negative transients above its breakdown threshold. Its glass-passivated junction ensures fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
It complies with AEC-Q101 stress testing for automotive applications and uses matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. The device is rated for 500 W peak pulse power (10/1000 μs), 3.0 W steady-state power dissipation at TL = 75 °C, and withstands 70 A non-repetitive forward surge (uni-directional only - not applicable to bi-directional SA40CHE3/54).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 44.4 V / 49.1 V at IT = 1 mA - Confirmed breakdown range ensures reliable triggering across process variation and temperature. |
| VC @ IPPM | 64.5 V at 7.8 A - Clamping voltage under full-rated 10/1000 μs transient; limits downstream component stress during surge events. |
| PPPM | 500 W - Peak pulse power handling capability with standard 10/1000 μs waveform; supports IEC 61000-4-5 Level 3/4 surge immunity. |
| ID @ VWM | 1.0 μA - Extremely low reverse leakage at stand-off voltage; preserves signal integrity and minimizes standby power loss. |
| TJ Range | -55 °C to +175 °C - Extended junction temperature range enables use 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
SA40CHE3/54 is a bi-directional TVS diode in DO-204AC (DO-15) package with no polarity marking; both terminals are functionally identical and interchangeable. The device has two axial leads - anode and cathode are symmetrical, enabling installation without orientation constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Bi-directional avalanche terminal | Acts as cathode during positive transients and anode during negative transients; no fixed polarity. |
| Cathode (Lead 2) | Bi-directional avalanche terminal | Functionally identical to Lead 1; symmetric conduction enables bidirectional clamping without circuit redesign. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - suitable for engine control and ADAS sensor protection. |
| Glass passivated junction | Enables sub-nanosecond response time and stable VBR tolerance over lifetime, critical for protecting high-speed digital interfaces. |
| 500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment and telecom infrastructure without external derating. |
| RoHS-compliant HE3 suffix | Matte tin plating with JESD 201 Class 2 whisker resistance - ensures long-term solder joint integrity in high-reliability assemblies. |
| UL 94 V-0 molding compound | Flame-retardant encapsulation meets safety standards for enclosed power supplies and EV charging modules. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional transient clamp placed across differential signal pair or supply rail to limit voltage excursions below IC absolute maximum ratings. Use Value: With 64.5 V clamping at 7.8 A and -55 °C to +175 °C operation, SA40CHE3/54 prevents latch-up and gate oxide damage in AEC-Q100 qualified transceivers. |
Use Scenario: Safeguarding 24 V DC input terminals of programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary front-end TVS on power entry, coordinated with upstream fuses and downstream LC filters to meet IEC 61000-4-4/5 immunity requirements. Use Value: 500 W pulse rating and 1.0 μA leakage enable robust protection without loading nominal 24 V supply or degrading EMC filter performance. |
| Telecom Line Interface | Consumer Appliance Motor Control |
|
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station remote units from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Bi-directional clamping element across data line pairs (e.g., A/B) referenced to local ground, absorbing differential and common-mode transients. Use Value: Symmetric VBR (44.4–49.1 V) and matched clamping ensure balanced protection on full-duplex links without skew or signal distortion. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs or driver ICs. IC Role / Device Role / Timing Role: Snubber-style TVS placed across motor terminals or flyback diode replacement in compact appliance PCBs where space limits discrete solutions. Use Value: DO-15 package fits tight layouts; 40 V VWM aligns with 36 V motor supply rails, and 64.5 V VC stays below MCU I/O voltage limits (e.g., 65 V abs max). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40CA | Same VWM (40 V), slightly higher VC (69.4 V @ 7.2 A), SMA package (surface-mount), lower PPPM (400 W). | Requires PCB re-layout for SMD placement; better suited for space-constrained consumer electronics vs. through-hole industrial modules. | Select SMAJ40CA when board area is limited and thermal coupling to copper pour can compensate for lower pulse power. |
| 1.5KE40CA | Same VWM (40 V), higher PPPM (1500 W), DO-201AD package (larger than DO-15), higher VC (64.5 V same, but at 23.3 A). | Higher surge capacity suits heavy-duty industrial drives; larger footprint and lead spacing may conflict with existing DO-15 footprints. | Choose 1.5KE40CA only if system-level surge tests exceed 500 W requirements and mechanical redesign is acceptable. |
Compared with SMAJ40CA and 1.5KE40CA, SA40CHE3/54 delivers optimal balance of AEC-Q101 qualification, DO-15 through-hole compatibility, and 500 W surge handling - making it the preferred choice for automotive and industrial designs requiring proven reliability without layout change.
Availability
SA40CHE3/54 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SA40CHE3/54 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 passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxxCx series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial automation, and telecom infrastructure where failure due to voltage surges must be eliminated.
FAQ
What is the polarity configuration of SA40CHE3/54?
SA40CHE3/54 is a bi-directional TVS diode with no polarity marking on the DO-204AC package. Both leads are functionally identical, allowing installation in either orientation. This symmetry enables clamping of both positive and negative transients without circuit modification - a key advantage over uni-directional variants like SA40A.
Does SA40CHE3/54 meet automotive qualification standards?
Yes, SA40CHE3/54 carries the HE3 suffix, indicating AEC-Q101 qualification. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114 - confirming suitability for under-hood and chassis-mounted automotive electronics where reliability is mission-critical.
What is the maximum clamping voltage of SA40CHE3/54 under surge conditions?
The maximum clamping voltage (VC) of SA40CHE3/54 is 64.5 V at 7.8 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can SA40CHE3/54 replace SA40A in an existing design?
No - SA40CHE3/54 is bi-directional while SA40A is uni-directional. Replacing SA40A with SA40CHE3/54 requires verification that the protected circuit does not rely on DC blocking behavior. In most signal-line applications, the bi-directional version is acceptable; however, power-rail applications may require re-evaluation of forward conduction paths.
What packaging format is used for SA40CHE3/54?
SA40CHE3/54 is supplied in 13-inch diameter paper tape and reel packaging with a base quantity of 4000 units per reel (package code 54). The device uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards, supporting wave and selective soldering processes.
SA40CHE3/54 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:
- -
- 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)
SA40CHE3/54 FAQ
1.How can I place an order for SA40CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA40CHE3/54 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 SA40CHE3/54 reliable?
The price and inventory of SA40CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA40CHE3/54 is usually 5 days.
3.What payment methods are accepted for SA40CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA40CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA40CHE3/54?
SA40CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA40CHE3/54 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 SA40CHE3/54?
For technical support, including SA40CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA40CHE3/54 requirements.
6.How does Aetrix verify that SA40CHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA40CHE3/54 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 SA40CHE3/54 meets industry standards.
7.What is the process for return or replacement of SA40CHE3/54?
All SA40CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA40CHE3/54, 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 SA40CHE3/54 part is unused and in its original packaging.
Return procedure for SA40CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA40CHE3/54 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
