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Diodes Incorporated P6KE18A-T
- Part No.:
- P6KE18A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE18A-T.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,213
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Product details
Overview
P6KE18A-T from Diodes Incorporated is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 15.3V reverse standoff voltage (VRWM), 17.1V minimum breakdown voltage (VBR), 25.2V maximum clamping voltage (VC) at 24A peak pulse current, and DO-15 axial package - used in industrial power supplies, automotive body control modules, and telecom interface protection.
For engineers reviewing the P6KE18A-T datasheet, P6KE18A-T pinout, P6KE18A-T application, or P6KE18A-T equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current handling under IEC 61000-4-5 surge conditions, unidirectional polarity requirement, and DO-15 through-hole mounting compatibility with legacy board layouts.
Technical Context
This TVS operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold (17.1–18.9V), it avalanches rapidly (<1 ns response) to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage and repeatable clamping performance across temperature.
The device is rated for 600W non-repetitive peak pulse power (10/1000 µs waveform), supports 100A forward surge current (8.3 ms half-sine), and maintains ≤5.0 µA reverse leakage at VRWM - enabling reliable protection without loading normal operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - sustains single IEC 61000-4-5 Level 4 (4 kV) surges without failure |
| Reverse Standoff Voltage (VRWM) | 15.3 V - maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 17.1–18.9 V @ 1.0 mA - precise avalanche initiation range for predictable clamping onset |
| Clamping Voltage (VC) | 25.2 V @ 24.0 A - limits transient voltage seen by protected ICs during surge events |
| Package | DO-15 - industry-standard axial leaded package with 0.4 g mass and UL 94V-0 molding |
| Operating Temperature | −55°C to +175°C - suitable for under-hood automotive and industrial environments |
Pinout & Package
DO-15 axial package: cathode indicated by band on body; anode and cathode leads extend linearly from opposite ends of molded plastic body; lead diameter 0.51–0.64 mm; overall length 25.4 mm max; body diameter 5.5–7.62 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side return path in unidirectional TVS configuration |
| Cathode | Current exit point during avalanche clamping | Banded end; connected to protected line (e.g., 12V rail or RS-485 bus) to clamp transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse rating | Enables robust protection against high-energy surges per IEC 61000-4-5 without derating at +25°C |
| Glass-passivated junction | Ensures long-term stability of breakdown voltage and low leakage drift over thermal cycling |
| Fast response time (<1 ns) | Clamps transients before sensitive downstream components experience overvoltage stress |
| RoHS-compliant lead finish | Meets EU Directive 2011/65/EU with full exemption documentation; compatible with standard SnPb and lead-free reflow |
Applications
| Automotive Body Control Module | Industrial DC Power Input |
|---|---|
Use Scenario: 12V battery line in BCM exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt clamping element placed between battery rail and ground, upstream of LDOs and microcontrollers. Use Value: Limits transient voltage to ≤25.2V, protecting 3.3V/5V logic rails and CAN transceivers from damage during 120V/500ms load dump events. |
Use Scenario: 24V DC input stage of programmable logic controller (PLC) power supply subjected to field wiring surges. IC Role / Device Role / Timing Role: First-line overvoltage suppression before bulk capacitor and switching regulator. Use Value: Absorbs up to 600W surge energy while maintaining clamping below 25.2V, preventing MOSFET gate oxide rupture and controller latch-up. |
| Telecom RS-485 Interface | Medical Equipment Power Entry |
Use Scenario: Protection of RS-485 transceiver data lines against ESD (IEC 61000-4-2) and induced surges from adjacent AC wiring. IC Role / Device Role / Timing Role: Unidirectional TVS on A/B differential pair referenced to local ground plane. Use Value: Clamps common-mode transients to ≤25.2V within nanoseconds, preserving signal integrity and preventing transceiver latch-up or permanent damage. |
Use Scenario: Mains-derived 5V/12V auxiliary supply in diagnostic imaging equipment requiring IEC 60601-1 compliance. IC Role / Device Role / Timing Role: Secondary overvoltage limiter after primary fuse and MOV, ensuring fail-safe clamping under fault conditions. Use Value: Provides deterministic 25.2V clamping with <5 µA leakage, avoiding false trips in low-power standby modes while meeting creepage/clearance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A-T | Same VRWM (15.3V) and VC (25.2V), but SMC package (surface-mount); 600W rating; lower thermal resistance (RθJA = 40°C/W vs. 75°C/W) | Requires PCB redesign for SMD placement; better suited for high-density layouts and automated assembly | Select when board space is constrained and reflow capability exists; avoid if through-hole assembly or high-temperature ambient (>125°C) dominates |
| P6KE18CA-T | Bidirectional variant; identical VRWM (15.3V), VBR (17.1–18.9V), and VC (25.2V); same DO-15 package and 600W rating | Protects AC-coupled or bidirectional signal lines (e.g., USB D+/D−, audio lines); no cathode marking | Select only for symmetrical surge threats where polarity reversal occurs; not interchangeable in unidirectional DC rail applications |
Compared with SMBJ18A-T and P6KE18CA-T, P6KE18A-T offers proven reliability in legacy through-hole designs, simpler polarity identification via cathode band, and direct drop-in replacement for existing DO-15 footprints - making it optimal for cost-sensitive industrial upgrades and repair scenarios where SMT conversion isn't justified.
Availability
P6KE18A-T is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom interface protection requiring stable component supply and long-lifecycle support despite Diodes' official obsolescence notice.
Supply support for P6KE18A-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The P6KE series belongs to Diodes' transient voltage suppressor product line, engineered specifically for high-energy surge immunity in harsh electrical environments - targeting automotive, industrial, and telecom infrastructure applications where reliability under repetitive stress is critical.
FAQ
Is P6KE18A-T still in active production?
No - Diodes Incorporated has officially discontinued the P6KE18A-T and marked it obsolete per DS21502 Rev. 20-4 (August 2024). However, Aetrix Electronics maintains legacy inventory with full traceability and provides extended supply support for ongoing production programs through controlled distribution channels.
What is the difference between P6KE18A-T and P6KE18CA-T?
P6KE18A-T is unidirectional with cathode band marking and clamps only positive transients to ground; P6KE18CA-T is bidirectional, lacks polarity marking, and clamps both polarities symmetrically. Their electrical specs (VRWM, VBR, VC, IPP) are identical, but they are not functionally interchangeable in DC rail protection.
Can P6KE18A-T be used in place of P6KE15A-T?
No - P6KE15A-T has VRWM = 12.8V and VC = 21.2V, while P6KE18A-T has VRWM = 15.3V and VC = 25.2V. Substituting without circuit review risks inadequate clamping margin or premature conduction during normal operation; voltage ratings must match system operating voltage and tolerance bands.
Does P6KE18A-T meet AEC-Q200 requirements?
No - the P6KE18A-T is not AEC-Q200 qualified. Diodes offers automotive-grade alternatives (e.g., AEC-Q200-compliant SMAJ18A) with PPAP support and IATF 16949 manufacturing; this part is intended for industrial and commercial applications unless explicitly validated for automotive use by the customer.
P6KE18A-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- P6KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 24A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
P6KE18A-T FAQ
1.How can I place an order for P6KE18A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE18A-T 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 P6KE18A-T reliable?
The price and inventory of P6KE18A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE18A-T is usually 5 days.
3.What payment methods are accepted for P6KE18A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE18A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE18A-T?
P6KE18A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE18A-T 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 P6KE18A-T?
For technical support, including P6KE18A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE18A-T requirements.
6.How does Aetrix verify that P6KE18A-T is sourced from the original manufacturer or authorized distributors?
All P6KE18A-T 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 P6KE18A-T meets industry standards.
7.What is the process for return or replacement of P6KE18A-T?
All P6KE18A-T units undergo pre-shipment inspection (PSI). If there is an issue with P6KE18A-T, 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 P6KE18A-T part is unused and in its original packaging.
Return procedure for P6KE18A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE18A-T Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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