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Vishay General Semiconductor - Diodes Division P4KA33AHE3/54
- Part No.:
- P4KA33AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA33AHE3/54.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,266
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Product details
Overview
P4KA33AHE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, with 31.4 V to 34.7 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), 45.7 V clamping voltage at 8.8 A surge current, and AEC-Q101 qualification for engine control units and sensor protection in 12 V automotive systems.
For engineers reviewing the P4KA33AHE3/54 datasheet, P4KA33AHE3/54 pinout, P4KA33AHE3/54 application, or P4KA33AHE3/54 equivalent, key selection criteria include clamping voltage vs. protected IC VDS/VCC margin, junction temperature derating above 25 °C, unidirectional polarity alignment with DC rail topology, and JESD201 Class 2 whisker resistance for high-reliability solder joints.
Technical Context
This TVS operates as a shunt-clamping device triggered by reverse-biased avalanche breakdown, designed specifically for fast transient suppression on low-voltage DC lines. Its patented PAR® construction enables stable clamping under repetitive 0.01% duty cycle surges while maintaining low incremental surge resistance and <3.5 V forward voltage at 25 A.
It is rated for continuous operation from –65 °C to +185 °C junction temperature, with thermal derating applied above 25 °C ambient per Figure 2, and meets RoHS 2002/95/EC and WEEE 2002/96/EC requirements. The matte tin-plated leads comply with J-STD-002 and JESD22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V - Ensures reliable triggering above 28.2 V stand-off voltage while avoiding false trips during normal 12 V system transients. |
| VC @ IPPM | 45.7 V - Clamps induced surges to safe levels below typical 48 V-rated automotive interface IC absolute maximum ratings. |
| PPPM | 400 W - Sustains 10/1000 µs waveform surges common in ISO 7637-2 Pulse 1/2a/3a tests without degradation. |
| IPPM | 8.8 A - Peak surge current capability aligned with worst-case load-dump energy in compact 12 V subsystems. |
| TJ max. | +185 °C - Enables placement near hot components (e.g., power MOSFETs, ignition drivers) without thermal shutdown risk. |
| VWM | 28.2 V - Stand-off voltage margin allows stable operation across full battery range (9–16 V) plus ripple and switching noise. |
| αVBR | 0.098 %/°C - Predictable VBR drift over temperature simplifies margining for extended-temperature ECU designs. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Cathode indicated by color band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path for clamped surge current | Connected to ground or low-impedance return plane; must handle 40 A single half-sine surge without bond wire fusing. |
| Cathode | Protected line connection point | Connected to line being protected (e.g., CAN_H, sensor supply); color band identifies this terminal per JEDEC standard. |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent 400 W pulse handling and low dynamic impedance across production lots and temperature extremes. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive under-hood use including temperature cycling, mechanical shock, and humidity exposure per stress test plan. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under long-term storage or elevated temperature/humidity, critical for safety-critical ECUs. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 16750-2 load dump edges), improving protection fidelity. |
| Solder dip 260 °C, 40 s | Supports standard lead-free reflow profiles without delamination or parameter shift, ensuring assembly yield. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppresses load dump transients (ISO 7637-2 Pulse 5a) on 12 V supply rails feeding microcontrollers and analog front-ends in gasoline/diesel ECUs. IC Role / Device Role: Shunt-clamping TVS placed between VBAT and GND upstream of input filter capacitors and LDOs. Use Value: Limits voltage excursion to ≤45.7 V, preventing latch-up or oxide rupture in 48 V-tolerant power management ICs and MCU IO cells. | Use Scenario: Protects LIN bus or analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching noise in body control modules. IC Role / Device Role: Unidirectional clamp on signal line referenced to local ground, with cathode tied to signal and anode to GND. Use Value: Clamps ±30 kV HBM ESD events to <15 V peak while adding <1 pF capacitance, preserving signal integrity up to 250 kbps LIN rates. |
| Body Control Module (BCM) Door Actuator Driver Protection | ADAS Camera Power Rail Protection |
Use Scenario: Guards H-bridge gate drivers and flyback diodes against back-EMF spikes generated by brushed DC motors in power window/liftgate actuators. IC Role / Device Role: Mounted across motor terminals or driver output pins to absorb inductive kickback energy. Use Value: Absorbs 400 W pulses at 8.8 A without degradation, enabling robust 100,000-cycle actuator lifetime in -40 °C to +125 °C environments. | Use Scenario: Shields 5 V or 12 V camera module power inputs from coupled transients during start-stop events or alternator regulation faults. IC Role / Device Role: Primary TVS on main power feed before DC-DC converter, sized to handle ISO 16750-2 Pulse 4a/b energy. Use Value: Maintains clamping performance at +185 °C junction temperature, allowing placement near heat-generating image sensors without derating loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/5A | Same VBR range (31.4–34.7 V), but lower PPPM = 400 W (same), higher VC = 53.3 V, SMA package (surface-mount) | Requires PCB rework for SMT layout; unsuitable for through-hole legacy designs or high-vibration mounting | Select when board space is constrained and automated assembly is used; verify thermal pad design for 1.5 W steady-state dissipation. |
| 1.5KE33A | Same DO-41 package and VBR, but non-automotive grade, no AEC-Q101, no JESD201 whisker testing, TJ max = 175 °C | Not qualified for safety-critical or under-hood automotive use; limited to industrial/commercial environments | Select only for cost-sensitive non-automotive applications where AEC-Q101 and 185 °C operation are not required. |
Compared with SMAJ33A-E3/5A and 1.5KE33A, the P4KA33AHE3/54 delivers verified AEC-Q101 reliability, 10 °C higher junction limit, and JESD201 Class 2 whisker resistance-critical for zero-defect automotive production and extended-temperature field operation.
Availability
P4KA33AHE3/54 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and automotive sensor interfaces requiring stable component supply across multi-year vehicle production cycles.
Supply support for P4KA33AHE3/54 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The P4KA33AHE3/54 belongs to Vishay's automotive TVS diode family engineered for AEC-Q101 compliance and extreme-temperature resilience in powertrain and chassis electronics.
FAQ
What is the clamping voltage of the P4KA33AHE3/54 at its rated peak pulse current?
The P4KA33AHE3/54 has a maximum clamping voltage (VC) of 45.7 V at its rated peak pulse current (IPPM) of 8.8 A, measured using the standardized 10/1000 µs waveform. This value ensures compatibility with 48 V-tolerant automotive ICs and provides sufficient margin above the 28.2 V stand-off voltage (VWM) under surge conditions. The P4KA33AHE3/54 maintains this clamping performance across its full operating temperature range.
Is the P4KA33AHE3/54 suitable for bidirectional transient suppression?
No, the P4KA33AHE3/54 is a unidirectional TVS diode only, as explicitly stated in the Vishay datasheet. It is designed to protect positive-polarity transients on DC lines referenced to ground. For bidirectional protection (e.g., AC lines or data buses), a separate symmetric device such as a bidirectional TVS or paired unidirectional units would be required. The P4KA33AHE3/54 polarity is marked by a cathode band and must be oriented correctly in-circuit.
Does the P4KA33AHE3/54 meet automotive qualification standards?
Yes, the P4KA33AHE3/54 is AEC-Q101 qualified and designated as high-reliability/automotive grade per its HE3 suffix. It has passed stress tests including temperature cycling, mechanical shock, humidity bias, and high-temperature operating life per the AEC-Q101 standard. This qualification confirms suitability for under-hood and safety-critical automotive applications where long-term reliability is mandatory.
What is the maximum junction temperature rating for the P4KA33AHE3/54?
The P4KA33AHE3/54 has a maximum junction temperature (TJ) rating of +185 °C, exceeding the +175 °C limit of standard industrial TVS diodes. This extended rating supports placement near high-power components in engine compartments and enables operation in harsh thermal environments without derating penalties beyond those defined in Figure 2 of the datasheet. The P4KA33AHE3/54 sustains full 400 W pulse capability up to this temperature limit.
How does the HE3 suffix affect the P4KA33AHE3/54's manufacturing and reliability?
The HE3 suffix on the P4KA33AHE3/54 indicates RoHS-compliant, high-reliability/automotive-grade construction with matte tin-plated leads that pass JESD201 Class 2 whisker testing. This ensures resistance to tin whisker formation under long-term storage and elevated temperature/humidity, a critical requirement for automotive electronics with 15+ year field lifetimes. The HE3 variant also guarantees full AEC-Q101 qualification and tighter parametric screening versus commercial-grade equivalents.
P4KA33AHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
P4KA33AHE3/54 FAQ
1.How can I place an order for P4KA33AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA33AHE3/54 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 P4KA33AHE3/54 reliable?
The price and inventory of P4KA33AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA33AHE3/54 is usually 5 days.
3.What payment methods are accepted for P4KA33AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA33AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA33AHE3/54?
P4KA33AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA33AHE3/54 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 P4KA33AHE3/54?
For technical support, including P4KA33AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA33AHE3/54 requirements.
6.How does Aetrix verify that P4KA33AHE3/54 is sourced from the original manufacturer or authorized distributors?
All P4KA33AHE3/54 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 P4KA33AHE3/54 meets industry standards.
7.What is the process for return or replacement of P4KA33AHE3/54?
All P4KA33AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA33AHE3/54, 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 P4KA33AHE3/54 part is unused and in its original packaging.
Return procedure for P4KA33AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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