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Vishay General Semiconductor - Diodes Division SA75CAHE3/54
- Part No.:
- SA75CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA75CAHE3/54.pdf
- Description:
- TVS DIODE 75VWM 121VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,169
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Product details
Overview
SA75CAHE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for robust overvoltage protection of sensitive electronics. It features a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1.0 mA, 500 W peak pulse power (10/1000 µs), clamping voltage of 121 V at 4.1 A peak pulse current, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA75CAHE3/54 datasheet, SA75CAHE3/54 pinout, SA75CAHE3/54 application, or SA75CAHE3/54 equivalent, this device serves as a RoHS-compliant, bidirectional surge protector with low clamping ratio, fast response time, and validated performance in automotive sensor lines, industrial I/O ports, and telecom interface protection under IEC 61000-4-5 surge conditions.
Technical Context
The SA75CAHE3/54 operates as a symmetrical avalanche diode, conducting in both directions when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 µA at 75 V), while the DO-15 package supports 275 °C solder dip per JESD 22-B106.
It delivers 500 W peak pulse power with 10/1000 µs waveform at TA = 25 °C, derates linearly above 25 °C per Fig. 2, and maintains clamping performance up to 175 °C junction temperature. The bidirectional configuration eliminates polarity concerns in AC-coupled or floating signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 83.3 V / 92.1 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable triggering across production lot and temperature. |
| VC @ IPPM | 121 V at 4.1 A - Clamped voltage during 500 W surge; limits downstream stress to ≤121 V under worst-case 10/1000 µs transients. |
| PPPM | 500 W - Peak pulse power handling per single 10/1000 µs event; meets Level 4 IEC 61000-4-5 (4 kV) surge immunity requirements. |
| ID @ VWM | <1.0 µA - Reverse leakage at rated stand-off; minimizes standby power loss and avoids false triggering in high-impedance nodes. |
| TJ max. | 175 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial environments without thermal shutdown. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: DO-15 (DO-204AC), axial-leaded, molded epoxy case with matte tin-plated leads. Bidirectional construction means no polarity marking; terminals are non-polarized and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both ends function identically; connects across protected line-to-line or line-to-ground to clamp bidirectional surges. |
| Lead 1 | Terminal | Standard axial lead; solderable per J-STD-002; supports manual or wave soldering with 275 °C/10 s max thermal profile. |
| Lead 2 | Terminal | Identical to Lead 1; no functional distinction-enables flexible PCB layout without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime; resists moisture ingress and electrochemical degradation in humid environments. |
| 500 W peak pulse power (10/1000 µs) | Handles repeated 4 kV IEC 61000-4-5 surges without parametric shift; suitable for industrial fieldbus and automotive CAN/LIN bus protection. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, mechanical shock, and humidity testing-no additional qualification needed for Tier 1 designs. |
| Low incremental clamping resistance | Enables tight VC/VBR ratio (~1.46×); reduces voltage overshoot during fast-rising transients like ESD or inductive switch-off. |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance; qualified for long-life automotive modules where tin whisker growth could cause latent shorts. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across sensor signal and ground to limit transient excursions to ≤121 V. Use Value: Prevents damage to 12-bit ADC inputs and op-amp front-ends by maintaining signal integrity during 100 V/100 ms load dump events. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Line-to-ground TVS on each isolated input channel, absorbing repetitive 500 W surges without degradation. Use Value: Extends mean time between failures (MTBF) by eliminating latch-up or gate oxide rupture in optocoupler input stages. |
| Telecom Interface Protection | Consumer Power Adapter Surge Suppression |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Differential-mode suppressor across A/B lines, leveraging bidirectional symmetry to handle ±121 V clamping equally. Use Value: Maintains signal eye diagram integrity during 1 kV/0.5 J surges per IEC 61000-4-5, avoiding communication lockup or packet loss. |
Use Scenario: Secondary-side overvoltage suppression in 12 V/3 A wall adapters subjected to mains-borne surges and capacitor discharge events. IC Role / Device Role / Timing Role: Output rail clamp between +12 V and GND, triggered only during abnormal >75 V excursions. Use Value: Prevents catastrophic failure of downstream USB-PD controllers or LDOs by limiting output overshoot to 121 V during 500 W transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | Same VWM (75 V) and PPPM (600 W), but SMC (DO-214AB) package; 30 % smaller footprint, higher thermal resistance. | Better suited for space-constrained PCBs with adequate copper pour; less effective in high-ambient-temperature chassis-mount scenarios. | Select SMBJ75CA when board area is critical and thermal management via copper is feasible. |
| 1.5KE75CA | Higher PPPM (1500 W), same DO-15 package; larger chip die, higher IPPM (18.1 A), slower response due to higher junction capacitance. | Preferred for legacy industrial systems requiring higher surge margin; not optimized for fast-edge ESD or high-frequency noise filtering. | Choose 1.5KE75CA only if system-level testing confirms need for >1 kW surge headroom and slower clamping is acceptable. |
Compared with SMBJ75CA and 1.5KE75CA, SA75CAHE3/54 offers optimal balance of AEC-Q101 qualification, DO-15 mechanical robustness, and precise 500 W clamping for automotive and industrial edge-node protection-without over-engineering size or cost.
Availability
SA75CAHE3/54 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom interface circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SA75CAHE3/54 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 TVS devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SAxxCA series is engineered specifically for bidirectional transient suppression in harsh environments-targeting automotive powertrain, body electronics, and industrial control systems where robustness and repeatable clamping are mandatory.
FAQ
What is the maximum clamping voltage of SA75CAHE3/54 under a 10/1000 µs surge?
The SA75CAHE3/54 clamps to a maximum of 121 V at its rated peak pulse current of 4.1 A, as specified in the Electrical Characteristics table for the 10/1000 µs waveform. This value is measured under standardized test conditions (TA = 25 °C) and represents the upper bound of voltage seen by protected circuitry during a full 500 W transient event. Designers must ensure downstream components tolerate ≤121 V under surge conditions.
Is SA75CAHE3/54 suitable for automotive applications?
Yes, SA75CAHE3/54 is AEC-Q101 qualified and carries the HE3 suffix indicating compliance with JESD 201 Class 2 whisker resistance-making it approved for automotive use in engine control, ADAS sensors, and body electronics. Its 175 °C maximum junction temperature, DO-15 mechanical robustness, and validated surge performance align with automotive environmental and reliability requirements.
How does the bidirectional nature of SA75CAHE3/54 affect its placement on a PCB?
The SA75CAHE3/54 has no polarity marking and functions identically in both directions, so it can be placed across any two nodes requiring symmetrical overvoltage protection-such as line-to-line in RS-485 or line-to-ground in AC-coupled audio paths. This eliminates orientation checks during assembly and simplifies layout for differential or floating signal rails where polarity is undefined.
What is the reverse leakage current of SA75CAHE3/54 at its rated stand-off voltage?
At VWM = 75 V and TA = 25 °C, the SA75CAHE3/54 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage ensures minimal power drain in battery-powered systems and prevents false triggering in high-impedance sensing circuits, such as those interfacing with precision op-amps or microcontroller ADC inputs.
Can SA75CAHE3/54 replace unidirectional TVS diodes like SA75A in existing designs?
No-SA75CAHE3/54 is strictly bidirectional and lacks a defined cathode/anode polarity, whereas SA75A is unidirectional with a marked cathode band. Substituting SA75CAHE3/54 for SA75A in DC-biased circuits may result in unintended forward conduction or improper clamping behavior. Always verify circuit topology: use SA75CAHE3/54 only where symmetrical protection is required, such as AC lines or differential buses.
SA75CAHE3/54 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- 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)
SA75CAHE3/54 FAQ
1.How can I place an order for SA75CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA75CAHE3/54 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 SA75CAHE3/54 reliable?
The price and inventory of SA75CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA75CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA75CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA75CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA75CAHE3/54?
SA75CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA75CAHE3/54 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 SA75CAHE3/54?
For technical support, including SA75CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA75CAHE3/54 requirements.
6.How does Aetrix verify that SA75CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA75CAHE3/54 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 SA75CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA75CAHE3/54?
All SA75CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA75CAHE3/54, 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 SA75CAHE3/54 part is unused and in its original packaging.
Return procedure for SA75CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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