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Vishay General Semiconductor - Diodes Division P4KE9.1A-E3/54
- Part No.:
- P4KE9.1A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE9.1A-E3/54.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,996
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Product details
Overview
P4KE9.1A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for circuit-level overvoltage protection. It features a 9.1 V nominal breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), and clamps transients to ≤13.4 V at 29.9 A peak pulse current (10/1000 μs waveform), delivering 400 W peak pulse power for surge suppression in DC power rails and signal lines.
For engineers reviewing the P4KE9.1A-E3/54 datasheet, P4KE9.1A-E3/54 pinout, P4KE9.1A-E3/54 application, or P4KE9.1A-E3/54 equivalent, this device is selected for robust, low-leakage (<50 μA at VWM) transient protection in automotive ECUs, industrial sensor interfaces, and consumer power supplies where fast response (<1 ns), glass-passivated junction reliability, and AEC-Q101 qualification are required.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping shunt protector: when reverse voltage exceeds VWM (7.78 V), it avalanches at VBR (8.65–9.55 V) and limits transient voltage to ≤13.4 V at 29.9 A. Its 0.068 %/°C temperature coefficient of VBR ensures stable clamping across -55 °C to +175 °C operating range.
It delivers 400 W peak pulse power under 10/1000 μs waveform with 0.01 % duty cycle, supports 40 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits low incremental surge resistance for effective energy diversion without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise avalanche onset window for reliable clamping threshold |
| VWM | 7.78 V - maximum continuous reverse working voltage before leakage rises significantly |
| ID @ VWM | ≤50 μA - ultra-low reverse leakage preserves system standby power and signal integrity |
| VC @ IPPM | ≤13.4 V at 29.9 A - clamped voltage level protects downstream 12 V-rated ICs and MOSFETs |
| PPPM | 400 W - peak transient energy absorption capability per 10/1000 μs pulse |
| TJ max. | +175 °C - high junction temperature rating enables use in under-hood automotive and industrial environments |
| RθJL | 66 °C/W - thermal resistance from junction to lead supports reliable power dissipation without heatsink |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded molded epoxy case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 22-B106 solderability (275 °C, 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during positive surges on cathode side |
| Cathode | Reverse-biased clamping terminal | Marked with color band; connected to protected line (e.g., 12 V rail); avalanches when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress |
| 400 W peak pulse power (10/1000 μs) | Handles common automotive load-dump and inductive-switching transients without degradation |
| AEC-Q101 qualified (E3 suffix variant) | Validated for automotive-grade deployment including engine control, body electronics, and ADAS sensors |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage margin between clamp level and protected device's absolute maximum rating |
| 0.068 %/°C VBR tempco | Ensures predictable clamping voltage shift across wide ambient temperature ranges (-55 °C to +175 °C) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply lines in engine control units (ECUs) against ISO 7637-2 pulse 1 (inductive switch-off) and pulse 2a (load dump). IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed in parallel with power input, clamping surges within nanoseconds. Use Value: Limits voltage to ≤13.4 V during 29.9 A transients, preventing latch-up or gate oxide damage in MCU and CAN transceivers. |
Use Scenario: Safeguarding analog outputs (4–20 mA) and digital I/O (RS-485, CAN) of PLC modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed at connector entry point to divert ESD and lightning-induced surges to ground. Use Value: 50 μA max leakage at 7.78 V avoids loading precision current loops; DO-41 package allows through-hole mounting on rugged industrial PCBs. |
| Consumer DC Power Adapter Input | Automotive Lighting Control Module |
|
Use Scenario: Input-stage protection for 9 V wall adapters and USB-C PD auxiliary power circuits subjected to AC line transients and hot-plug events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, upstream of LDOs and buck converters. Use Value: 400 W pulse rating absorbs multiple 1 kV/500 A surges per IEC 61000-4-5; RoHS-compliant E3 suffix meets commercial environmental compliance. |
Use Scenario: Protecting LED driver ICs and MOSFET switches in headlight control modules from battery reversal and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS on switched 12 V output rail, oriented to block reverse polarity while clamping positive spikes. Use Value: AEC-Q101 qualification confirms operation at +125 °C ambient; 175 °C TJ max supports placement near heat-generating LED drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | DO-214AA package; 9.0 V VBR (min 8.55 V); 600 W PPPM; higher surge current (33.3 A) | Surface-mount alternative with higher power rating but larger footprint and no axial lead option | Select SMBJ9.0A when board space permits SMT and higher surge margin is needed; not drop-in for through-hole designs. |
| P4KE9.1CA | Bidirectional variant; same VBR range (8.65–9.55 V) but symmetric clamping in both polarities; no polarity marking | Required for AC-coupled or dual-polarity signal lines (e.g., RS-232, audio) where negative transients must also be suppressed | Choose P4KE9.1CA only if bidirectional protection is mandated; unidirectional P4KE9.1A-E3/54 offers lower leakage and simpler layout for DC rails. |
Compared with SMBJ9.0A and P4KE9.1CA, the P4KE9.1A-E3/54 provides optimal cost-performance balance for axial through-hole 12 V DC protection: its DO-41 package enables manual assembly and rework, 50 μA leakage minimizes standby loss, and AEC-Q101 qualification validates automotive readiness without SMT infrastructure investment.
Availability
P4KE9.1A-E3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and consumer power adapter production requiring stable component supply and full traceability.
Supply support for P4KE9.1A-E3/54 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, efficiency, and automotive-grade validation.
The P4KE9.1A-E3/54 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized transient suppression in harsh environments-targeting automotive, industrial, and high-reliability power systems.
FAQ
What is the breakdown voltage tolerance of P4KE9.1A-E3/54?
The P4KE9.1A-E3/54 has a specified breakdown voltage range of 8.65 V to 9.55 V at test current IT = 1.0 mA. This ±5.5 % tolerance ensures consistent clamping behavior across production lots while allowing margin for temperature drift (0.068 %/°C) and aging effects in long-life applications like automotive ECUs.
Is P4KE9.1A-E3/54 suitable for automotive applications?
Yes, the P4KE9.1A-E3/54 is AEC-Q101 qualified (as indicated by the HE3 suffix variant), and the E3 suffix version meets commercial-grade reliability requirements widely adopted in automotive subsystems. Its 175 °C maximum junction temperature, glass-passivated junction, and 400 W surge rating make P4KE9.1A-E3/54 appropriate for under-hood and body-control module deployments.
How does the clamping voltage of P4KE9.1A-E3/54 compare to its breakdown voltage?
The P4KE9.1A-E3/54 clamps to ≤13.4 V at 29.9 A (10/1000 μs waveform), yielding a clamping ratio (VC/VBR) of approximately 1.44. This tight ratio ensures protected devices-such as 12 V logic ICs or MOSFETs with 16 V absolute maximum ratings-remain safely within operational limits during surge events.
What is the maximum reverse leakage current for P4KE9.1A-E3/54 at rated stand-off voltage?
At its stand-off voltage VWM = 7.78 V and TA = 25 °C, the P4KE9.1A-E3/54 exhibits a maximum reverse leakage current of 50 μA. This low leakage preserves power efficiency in always-on systems (e.g., automotive wake-up circuits) and avoids false triggering in high-impedance sensor bias networks.
Can P4KE9.1A-E3/54 be used in bidirectional signal protection?
No-P4KE9.1A-E3/54 is a unidirectional TVS diode, intended for DC rail protection where polarity is fixed. For bidirectional signal lines (e.g., RS-232, CAN, or audio), the bidirectional variant P4KE9.1CA must be used instead, as it provides symmetrical clamping in both voltage polarities without polarity marking.
P4KE9.1A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 29.9A
- Power - Peak Pulse:
- 400W
- 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-204AL (DO-41)
P4KE9.1A-E3/54 FAQ
1.How can I place an order for P4KE9.1A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE9.1A-E3/54 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 P4KE9.1A-E3/54 reliable?
The price and inventory of P4KE9.1A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE9.1A-E3/54 is usually 5 days.
3.What payment methods are accepted for P4KE9.1A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE9.1A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE9.1A-E3/54?
P4KE9.1A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE9.1A-E3/54 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 P4KE9.1A-E3/54?
For technical support, including P4KE9.1A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE9.1A-E3/54 requirements.
6.How does Aetrix verify that P4KE9.1A-E3/54 is sourced from the original manufacturer or authorized distributors?
All P4KE9.1A-E3/54 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 P4KE9.1A-E3/54 meets industry standards.
7.What is the process for return or replacement of P4KE9.1A-E3/54?
All P4KE9.1A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE9.1A-E3/54, 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 P4KE9.1A-E3/54 part is unused and in its original packaging.
Return procedure for P4KE9.1A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE9.1A-E3/54 Tags
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