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Vishay General Semiconductor - Diodes Division SA33AHE3/54
- Part No.:
- SA33AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA33AHE3/54.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,643
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Product details
Overview
SA33AHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for circuit protection against ESD and surge transients. 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), 53.3 V clamping voltage at 9.4 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA33AHE3/54 datasheet, SA33AHE3/54 pinout, SA33AHE3/54 application, or SA33AHE3/54 equivalent, this device is selected for robust overvoltage protection in DC power rails, sensor interfaces, and automotive control modules where reliability under repetitive surge stress and high-temperature operation up to 175 °C are critical.
Technical Context
The SA33AHE3/54 operates as a unidirectional avalanche-clamping TVS diode with glass-passivated junction, enabling fast response (<1 ns) to transient events. Its 500 W peak pulse power rating is defined per 10/1000 μs waveform at 0.01 % duty cycle, and it maintains stable clamping performance across -55 °C to +175 °C junction temperature range.
It exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.38), with 3.5 V maximum forward voltage at 100 A surge current. The device meets JESD22-B106 solderability standards and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown Voltage) | 36.7–40.6 V at 1 mA - Confirmed avalanche onset range defining reliable turn-on threshold |
| VC (Clamping Voltage) | 53.3 V at 9.4 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge |
| PPPM (Peak Pulse Power) | 500 W - Sustained energy absorption capability under standardized surge waveform |
| IFSM (Surge Current) | 70 A - Maximum non-repetitive forward surge current (10 ms half-sine) |
| TJ max. | +175 °C - Maximum junction temperature enabling under-hood automotive deployment |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress-test requirements including HTOL, TC, AC/DC life tests |
Pinout & Package
Package: DO-15 (DO-204AC), axial leaded, molded epoxy case with matte tin-plated leads. Polarity marked by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry / Surge return path | Connected to ground or low-impedance return in unidirectional clamp configuration |
| Cathode (banded end) | Clamping node / Surge sink | Connected to protected line; conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under thermal cycling |
| 500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without derating in typical PCB layouts |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance |
| Low clamping voltage (53.3 V @ 9.4 A) | Provides tighter protection margin for 33 V-rated systems compared to generic 36 V TVS devices |
| Solderable per J-STD-002/JESD 22-B102 | Ensures robust lead termination integrity after reflow or wave soldering at 275 °C for 10 s |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V/33 V battery-supplied ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 33 V. Use Value: Withstands 70 A IFSM and clamps to 53.3 V, safeguarding downstream regulators and microcontrollers rated for ≤60 V absolute max. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation equipment from cable-induced ESD and switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point to suppress sub-100 ns transients before signal conditioning stage. Use Value: Fast <1 ns response and 53.3 V clamping prevent latch-up or damage to precision op-amps and ADC inputs operating near 33 V supply rails. |
| Telecom DC Feeder Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Guarding 48 V DC power feeds in remote radio units and base station backhaul equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary DC input to absorb lightning-induced surges coupled via long outdoor cabling. Use Value: 500 W PPPM and 175 °C TJ max enable uninterrupted operation in unventilated enclosures exposed to ambient temperatures up to 85 °C. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., vacuum cleaners, power tools). IC Role / Device Role / Timing Role: Unidirectional TVS across motor terminals to clamp flyback voltage spikes during PWM commutation. Use Value: 70 A IFSM rating handles repeated 10 ms surge pulses from motor startup/stall, while DO-15 package allows direct through-hole mounting on high-current traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/52 (Vishay) | Same VWM/VBR/VC specs but in SMA (DO-214AC) surface-mount package; lower IFSM (40 A) | Better suited for space-constrained PCBs; not suitable for high-current through-hole motor terminals | Select when board real estate is limited and surge currents remain below 40 A |
| P6SMB33A (Littelfuse) | Identical electrical specs (33 V VWM, 53.3 V VC), DO-214AA package, AEC-Q101 qualified | Same form factor as SMAJ33A; differs only in branding and minor thermal resistance (0.5 °C/W higher) | Drop-in alternative for dual-sourcing; verify tape-and-reel packaging compatibility (52 vs 54) |
Compared with SA33AHE3/54, SMAJ33A-E3/52 offers surface-mount flexibility at reduced surge current handling, while P6SMB33A provides identical protection performance in an alternate qualified package-both require layout adaptation but preserve system-level clamping behavior.
Availability
SA33AHE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply with AEC-Q101 compliance and high-temperature resilience.
Supply support for SA33AHE3/54 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 protection devices with emphasis on reliability and automotive qualification.
The SAxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including under-hood automotive, industrial controls, and infrastructure power systems.
FAQ
What is the clamping voltage of SA33AHE3/54 and how is it measured?
The SA33AHE3/54 has a maximum clamping voltage (VC) of 53.3 V, measured at a peak pulse current (IPPM) of 9.4 A using the standardized 10/1000 μs double-exponential surge waveform. This value represents the highest voltage imposed on the protected circuit during a transient event and is guaranteed per the Vishay datasheet revision 27-Sep-2021. The SA33AHE3/54 maintains this clamping performance across its full operating temperature range.
Is SA33AHE3/54 suitable for automotive applications?
Yes, SA33AHE3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junction, matte tin-plated leads compliant with J-STD-002, and operation up to +175 °C junction temperature-meeting requirements for engine control units, body electronics, and ADAS subsystems. The HE3 suffix denotes AEC-Q101 qualification, distinguishing it from commercial-grade E3 variants.
What does the "HE3/54" suffix mean in SA33AHE3/54?
The "HE3" suffix indicates RoHS-compliant, AEC-Q101-qualified construction with JESD201 Class 2 whisker resistance; "54" refers to the preferred package code for 13-inch paper tape and reel packaging containing 4000 units. This ordering code ensures traceable, automotive-grade material with verified solderability and long-term reliability-distinct from non-HE3 versions intended for commercial use.
How does SA33AHE3/54 differ from bidirectional TVS diodes like SA33CA?
SA33AHE3/54 is unidirectional and features a cathode band for polarity identification, allowing it to conduct only in reverse breakdown-ideal for DC power rail protection. In contrast, SA33CA is bidirectional with no polarity marking and symmetrical clamping in both directions, suited for AC lines or data bus protection. Their VBR and VC values differ slightly due to test methodology; SA33AHE3/54 cannot substitute for SA33CA without circuit redesign.
Can SA33AHE3/54 be used in parallel for higher surge current handling?
No-SA33AHE3/54 is not recommended for parallel connection due to mismatch in VBR tolerance (±5 %) and dynamic impedance, which causes uneven current sharing and potential thermal runaway. For higher surge capacity, select a single higher-rated device such as SA40AHE3/54 or implement staged protection with upstream current-limiting resistors. Parallel use voids AEC-Q101 qualification guarantees for the SA33AHE3/54.
SA33AHE3/54 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:
- 1
- Bidirectional Channels:
- -
- 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)
SA33AHE3/54 FAQ
1.How can I place an order for SA33AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA33AHE3/54 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 SA33AHE3/54 reliable?
The price and inventory of SA33AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA33AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA33AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA33AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA33AHE3/54?
SA33AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA33AHE3/54 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 SA33AHE3/54?
For technical support, including SA33AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA33AHE3/54 requirements.
6.How does Aetrix verify that SA33AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA33AHE3/54 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 SA33AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA33AHE3/54?
All SA33AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA33AHE3/54, 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 SA33AHE3/54 part is unused and in its original packaging.
Return procedure for SA33AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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