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Vishay General Semiconductor - Diodes Division SA33CAHE3/54
- Part No.:
- SA33CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA33CAHE3/54.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,648
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Product details
Overview
SA33CAHE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 μs), 9.4 A peak pulse current (IPPM), and clamps to ≤53.3 V at rated surge. Used in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the SA33CAHE3/54 datasheet, SA33CAHE3/54 pinout, SA33CAHE3/54 application, or SA33CAHE3/54 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, DO-15 mechanical compatibility, 175 °C max junction temperature, and low incremental clamping voltage under 10/1000 μs surge conditions.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional structure. It exhibits a typical breakdown voltage tolerance of ±5 %, temperature coefficient of +39 mV/°C, and clamps transients within nanoseconds - enabling protection of downstream ICs like microcontrollers and CAN transceivers against ESD, load dump, and inductive switching spikes.
Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM), while the DO-15 package supports manual or automated through-hole assembly. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, making it suitable for automotive-grade designs requiring long-term reliability under thermal cycling and vibration stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - defines reliable turn-on threshold across production lot |
| VC @ IPPM | ≤53.3 V at 9.4 A - clamping voltage during full-rated 10/1000 μs transient, limiting stress on protected circuit |
| PPPM | 500 W - peak surge energy handling capacity per single event, compliant with ISO 7637-2 Pulse 1/2a/3a |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity in high-impedance sensor lines |
| TJ max | +175 °C - enables operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTOL, TC, UHST |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with matte tin-plated leads; no polarity marking for bidirectional configuration - terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as input/output for bidirectional clamping; no cathode band marking required |
| Leads (2) | PCB interconnect interface | Through-hole solderable per J-STD-002; 275 °C max solder dip for 10 s |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime, even under humidity and thermal stress |
| 500 W peak pulse rating (10/1000 μs) | Meets ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (battery disconnect) immunity requirements |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use including engine control units, body electronics, and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during surge events, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for industrial and transportation safety compliance |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤53.3 V, preventing ADC saturation and preserving measurement accuracy during 12 V system faults. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-side surges induced by relay coil de-energization. IC Role / Device Role / Timing Role: Primary surge suppression element across 24 V DC input terminals prior to optocoupler isolation stage. Use Value: Absorbs up to 500 W of inductive energy without degradation, maintaining functional safety integrity per IEC 61000-4-5 Level 3. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485 transceiver pins in base station backhaul equipment subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Common-mode TVS pair (two SA33CAHE3/54 devices) across differential bus lines relative to ground. Use Value: Symmetric clamping ensures balanced line integrity during fast-rising transients, avoiding data corruption in half-duplex communication. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Across motor terminals and between H-bridge power FETs and ground plane. Use Value: Withstands repetitive 10/1000 μs surges at 0.01 % duty cycle, extending MOSFET lifetime and eliminating false overvoltage trips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same VWM/VBR/PPPM specs but in SMA (DO-214AC) surface-mount package; lower thermal resistance (50 °C/W vs. 65 °C/W) | Preferred for space-constrained PCBs or reflow-only assembly; not drop-in compatible with DO-15 footprint | Select SMAJ33CA when board real estate is limited and SMT process is available. |
| P6KE33CA | Same DO-15 package and electrical specs, but lacks AEC-Q101 qualification and uses E3 (commercial) rather than HE3 (automotive) suffix | Suitable for non-automotive industrial use where qualification testing is not mandated | Choose P6KE33CA for cost-sensitive consumer or general-purpose designs without automotive reliability requirements. |
Compared with SMAJ33CA and P6KE33CA, SA33CAHE3/54 uniquely combines AEC-Q101 qualification, DO-15 through-hole robustness, and verified 175 °C operation - making it the preferred choice for automotive Tier-1 suppliers and industrial OEMs requiring traceable, long-lifecycle component assurance.
Availability
SA33CAHE3/54 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 across multi-year production programs.
Supply support for SA33CAHE3/54 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, and protection devices with emphasis on reliability and automotive-grade qualification.
The SAxxCA series targets high-reliability transient suppression in harsh environments, with design focus on AEC-Q101 compliance, stable clamping performance, and compatibility with legacy DO-15 assembly infrastructure.
FAQ
What is the maximum clamping voltage of SA33CAHE3/54 under rated surge conditions?
The SA33CAHE3/54 has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated 9.4 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number 88378) and reflects worst-case performance across temperature and production lot variation.
Is SA33CAHE3/54 suitable for automotive applications?
Yes, SA33CAHE3/54 is AEC-Q101 qualified (confirmed by the HE3 suffix), tested for high-temperature operation up to +175 °C, and validated for thermal cycling, humidity, and mechanical shock. It is explicitly intended for automotive use cases such as engine control, body electronics, and ADAS sensor interfaces per Vishay's product documentation.
Does SA33CAHE3/54 have polarity markings on the package?
No, SA33CAHE3/54 does not feature a cathode band or other polarity marking because it is a bidirectional TVS diode. Both terminals are functionally identical, allowing installation in either orientation on the PCB - a key advantage for simplified layout and reduced assembly errors.
What is the leakage current specification for SA33CAHE3/54 at its stand-off voltage?
At its 33 V stand-off voltage (VWM), SA33CAHE3/54 exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C. This low leakage preserves signal fidelity in high-impedance circuits such as sensor bias networks and precision analog front-ends without introducing measurable offset or loading error.
Can SA33CAHE3/54 be used in place of unidirectional TVS diodes like SA33A?
No - SA33CAHE3/54 is strictly bidirectional and cannot replace unidirectional types like SA33A in DC-biased circuits where forward conduction must be blocked. Its symmetrical IV curve allows conduction in both directions, making it unsuitable for applications requiring DC blocking or rectification functionality alongside surge protection.
SA33CAHE3/54 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 9.4A
- 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)
SA33CAHE3/54 FAQ
1.How can I place an order for SA33CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA33CAHE3/54 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 SA33CAHE3/54 reliable?
The price and inventory of SA33CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA33CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA33CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA33CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA33CAHE3/54?
SA33CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA33CAHE3/54 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 SA33CAHE3/54?
For technical support, including SA33CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA33CAHE3/54 requirements.
6.How does Aetrix verify that SA33CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA33CAHE3/54 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 SA33CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA33CAHE3/54?
All SA33CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA33CAHE3/54, 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 SA33CAHE3/54 part is unused and in its original packaging.
Return procedure for SA33CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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