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onsemi P6KE33AG
- Part No.:
- P6KE33AG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- T-18, Axial
- Datasheet:
-
P6KE33AG.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:11,177
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Product details
Overview
P6KE33AG from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in axial-leaded Surmetic-40 package, designed for parallel clamping of high-energy transients. It features 600 W peak pulse power (1 ms), 45.7 V clamping voltage at 13.2 A peak pulse current, and 28.2 V working peak reverse voltage - deployed in industrial power supplies and communication interfaces to protect downstream ICs from ESD and lightning-induced surges.
For engineers reviewing the P6KE33AG datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system DC bus voltage, VC margin below IC absolute maximum ratings, thermal derating above 25°C ambient, and UL 497B certification for isolated loop protection compliance.
Technical Context
The P6KE33AG operates as a silicon avalanche diode with fast <1 ns response time and low leakage (<5 µA @ 28.2 V). Its clamping behavior follows a well-defined VBR–VC relationship: breakdown occurs at 31.4–34.7 V (min–max @ 1 mA), delivering predictable overvoltage protection without forward conduction during normal operation.
Thermal design relies on junction-to-lead resistance of 20°C/W and steady-state power dissipation of 5.0 W (derated above 50°C). It supports surge currents up to 100 A (8.3 ms half-sine) and meets Class 3 HBM ESD rating (>16 kV), making it suitable for environments with repetitive transient exposure when duty cycle is managed per Figure 6.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms - sustains single high-energy surges without failure |
| Working Peak Reverse Voltage | 28.2 V - sets max continuous DC/peak AC voltage before clamping activates |
| Clamping Voltage | 45.7 V @ 13.2 A IPP - defines worst-case voltage seen by protected circuit during surge |
| Breakdown Voltage | 31.4–34.7 V @ 1 mA - ensures reliable turn-on within specified tolerance band |
| Leakage Current | <5 µA @ 28.2 V - negligible standby power loss and signal integrity impact |
| Response Time | <1 ns - limits voltage overshoot before clamping engages |
| UL Recognition | UL 497B certified - validated for isolated loop circuit protection in safety-critical systems |
Pinout & Package
Surmetic-40 axial-leaded plastic package (Case 017AA), cathode indicated by polarity band. Leads are solderable, corrosion-resistant, rated for 260°C @ 1/16″ from case for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during clamping | Connected to ground or low-impedance return path to complete surge current loop |
| Cathode | Protected line connection | Connected to line under protection (e.g., +VDC rail or signal line); polarity band marks this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse rating | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation |
| UL 497B recognition | Validates suitability for telecom and industrial isolated loop protection per safety standard |
| Class 3 HBM ESD rating | Withstands >16 kV human-body-model discharges common in handling and field operation |
| Low temperature coefficient | 0.098 %/°C VBR drift - maintains stable clamping threshold across −55°C to +150°C operating range |
| Pb-free Surmetic-40 package | Meets RoHS requirements while retaining mechanical reliability and thermal performance |
Applications
| Industrial Power Supply Protection | Telecom Line Interface |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and chassis ground to clamp positive-going surges before they reach DC-DC converter ICs. Use Value: Limits transient voltage to ≤45.7 V, staying 15% below typical 50 V absolute max rating of buck controller ICs. | Use Scenario: RS-485 data line in building automation system subject to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired P6KE33AG devices (line-to-ground) provide differential-mode clamping on A/B lines, referenced to isolated ground plane. Use Value: Achieves UL 497B-compliant isolation barrier protection with sub-1 ns response, minimizing data corruption during surge events. |
| Medical Equipment Input Stage | Process Control Sensor Interface |
Use Scenario: Auxiliary 12–36 V DC input to patient monitor with external power adapter connection. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input, upstream of fuse and filtering, ensuring no hazardous voltage propagates into safety-isolated domains. Use Value: UL 497B certification confirms compliance with medical-grade isolated loop protection requirements for secondary circuits. | Use Scenario: 4–20 mA current loop transmitter connected to PLC analog input card in chemical plant environment. IC Role / Device Role / Timing Role: TVS mounted at field-side connector to shunt surge energy before entering intrinsically safe barrier circuitry. Use Value: 28.2 V VRWM matches typical loop supply headroom, preventing false triggering while clamping 45.7 V surges that exceed barrier withstand rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Surface-mount SMB package; same 33 V nominal breakdown but 600 W rating at 10×1000 µs waveform | Requires PCB rework for SMT layout; lower thermal resistance (RθJL = 10°C/W vs. 20°C/W) improves power handling in compact designs | Select when board space is constrained and automated assembly is preferred over through-hole mounting |
| 1.5KE33A | Same axial package but higher 1500 W peak power rating; 45.7 V clamping at 33 A IPP (vs. 13.2 A) | Over-spec'd for most 600 W use cases; larger physical size (Case 017AB) may not fit existing cutouts | Select only when legacy 1.5KE footprint compatibility is required and higher surge margin is justified |
Compared with SMBJ33A and 1.5KE33A, the P6KE33AG offers optimal balance of axial-leaded serviceability, UL 497B certification for isolated loops, and precise 600 W/13.2 A clamping alignment - making it preferred for field-serviceable industrial equipment where leaded reliability and safety compliance are prioritized over miniaturization or extreme surge headroom.
Availability
P6KE33AG is available at Aetrix Electronics and suitable for industrial power supplies, telecom line interfaces, medical equipment input stages, and process control sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for P6KE33AG 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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The P6KE33AG belongs to the P6KE6.8A Series of unidirectional TVS diodes engineered specifically for cost-effective, high-reliability transient suppression in industrial and communications infrastructure - emphasizing UL-certified isolation barrier protection and axial-leaded mechanical robustness.
FAQ
What is the clamping voltage of the P6KE33AG and how is it measured?
The P6KE33AG has a maximum clamping voltage (VC) of 45.7 V, measured at a peak pulse current (IPP) of 13.2 A using the 1 ms exponential waveform defined in Figure 4 of the datasheet. This value represents the worst-case voltage imposed on the protected circuit during a transient event and is critical for ensuring compatibility with downstream IC voltage tolerances. The P6KE33AG maintains this clamping performance across its full operating temperature range of −55°C to +150°C.
Does the P6KE33AG meet UL safety standards for isolated loop protection?
Yes, the P6KE33AG is UL 497B recognized (File #E210057, QVGQ2 category) for isolated loop circuit protection - a requirement for telecom, industrial control, and medical applications where galvanic isolation must be maintained during surge events. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing, distinguishing it from components with only flammability-rated packaging. The P6KE33AG's UL listing applies across the full P6KE6.8A–P6KE200A series.
What is the difference between P6KE33AG and P6KE33A?
The "G" suffix in P6KE33AG denotes a Pb-free version of the P6KE33A, compliant with RoHS Directive 2011/65/EU. Both share identical electrical specifications including 28.2 V VRWM, 31.4–34.7 V VBR, and 45.7 V VC @ 13.2 A. The P6KE33AG uses lead-free solder-compatible terminations and conforms to ON Semiconductor's Pb-free manufacturing standard, while maintaining the same Surmetic-40 axial package dimensions and thermal characteristics as the legacy P6KE33A.
Can the P6KE33AG be used in bidirectional protection circuits?
No, the P6KE33AG is a unidirectional TVS diode and conducts only during positive transients relative to its cathode. For bidirectional protection (e.g., AC lines or differential data buses), two P6KE33AG devices must be connected in series opposition, or a dedicated bidirectional part such as P6KE33CA should be selected. Using a single P6KE33AG on an AC signal will result in forward conduction during negative half-cycles, potentially damaging the device or distorting the signal.
What is the maximum steady-state power dissipation for the P6KE33AG at 75°C ambient?
At 75°C ambient temperature, the P6KE33AG's steady-state power dissipation is derated to 3.75 W. This is calculated from its base rating of 5.0 W at ≤25°C ambient, with linear derating of 50 mW/°C above 50°C (per datasheet Figure 5). The device's thermal resistance (RJL = 20°C/W) means a 3.75 W dissipation yields a 75°C junction-to-lead temperature rise, keeping total junction temperature within the −55°C to +150°C operating limit. The P6KE33AG must be mounted with 3/8″ lead length for rated performance.
P6KE33AG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- T-18, Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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):
- 13.2A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
P6KE33AG FAQ
1.How can I place an order for P6KE33AG through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE33AG 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 P6KE33AG reliable?
The price and inventory of P6KE33AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE33AG is usually 5 days.
3.What payment methods are accepted for P6KE33AG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE33AG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE33AG?
P6KE33AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE33AG 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 P6KE33AG?
For technical support, including P6KE33AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE33AG requirements.
6.How does Aetrix verify that P6KE33AG is sourced from the original manufacturer or authorized distributors?
All P6KE33AG 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 P6KE33AG meets industry standards.
7.What is the process for return or replacement of P6KE33AG?
All P6KE33AG units undergo pre-shipment inspection (PSI). If there is an issue with P6KE33AG, 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 P6KE33AG part is unused and in its original packaging.
Return procedure for P6KE33AG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE33AG Tags
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