My Inquiry
My Account
Taiwan Semiconductor Corporation P4KE9.1A
- Part No.:
- P4KE9.1A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE9.1A.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,594
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4KE9.1A from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 9.1V nominal breakdown voltage, 7.78V working stand-off voltage, 13.4V maximum clamping voltage at 31A peak pulse current, and 400W peak pulse power rating per 10/1000μs waveform - deployed in automotive body control modules to suppress load-dump and inductive switching transients.
For engineers reviewing the P4KE9.1A datasheet, P4KE9.1A pinout, P4KE9.1A application, or P4KE9.1A equivalent, this page delivers verified electrical parameters, DO-204AL package details, AEC-Q101 qualification status, clamping performance under standardized surge waveforms, and direct alternatives with documented VBR, VC, and IPPM differences.
Technical Context
The P4KE9.1A operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its 8.65–9.55V breakdown range at 1mA test current. Its low dynamic impedance enables rapid clamping response (<1.0ps from 0V to VBR) and limits transient energy dissipation across protected ICs.
It complies with ANSI/IEEE C62.35 for transient suppression, supports steady-state power dissipation of 1W at 75°C lead temperature, and maintains reverse leakage <50μA at 7.78V - ensuring minimal standby current impact in always-on automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 9.1V - defines rated standoff margin before avalanche conduction begins |
| Breakdown Voltage VBR | 8.65–9.55V @ 1mA - ensures reliable turn-on within tight tolerance for predictable protection threshold |
| Working Stand-off Voltage VWM | 7.78V - maximum continuous reverse voltage without significant leakage; sets safe operating margin below VBR |
| Clamping Voltage VC | 13.4V @ 31A - peak voltage seen by downstream circuit during 10/1000μs surge; determines minimum IC withstand rating |
| Peak Pulse Power PPK | 400W - energy-handling capacity for single non-repetitive transients per industry-standard waveform |
| Reverse Leakage ID | <50μA @ VWM - negligible quiescent current draw in battery-powered or low-power systems |
| Junction Temperature Range | −55°C to +175°C - supports operation in under-hood automotive environments and industrial enclosures |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; completes conduction loop during transient clamp |
| Cathode | Protected line input | Connected to supply rail or signal line being protected; avalanche occurs between cathode and anode when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | Validated for automotive-grade reliability including temperature cycling, mechanical shock, and humidity testing |
| 400W surge capability (10/1000μs) | Withstands high-energy transients common in 12V vehicle electrical systems without degradation |
| Clamping voltage ≤13.4V at 31A | Ensures protected logic-level interfaces (e.g., CAN transceivers, microcontrollers) remain below absolute maximum ratings |
| Reverse leakage <50μA @ 7.78V | Minimizes parasitic loading on low-current sensor bias networks and battery-backed circuits |
| Fast response time <1.0ps | Engages before transient edge propagates into sensitive analog or digital circuitry |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIO and LIN bus pins from load-dump spikes and relay coil flyback in door module PCBs. IC Role / Device Role / Timing Role: Primary unidirectional TVS placed directly at connector entry point to shunt surge energy to chassis ground. Use Value: Clamps 13.4V max at 31A, keeping MCU I/O within 15V absolute maximum while adding <0.3g mass and zero active components. |
Use Scenario: Safeguarding 24V DC digital input channels against EFT bursts and field-wiring induced surges in factory automation controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted upstream of optocoupler input to prevent false triggering and LED damage. Use Value: 7.78V VWM allows full 24V nominal operation; 13.4V VC ensures optocoupler CTR remains stable under IEC 61000-4-4 Level 4 stress. |
| LED Driver Power Supply | USB-C Port ESD Protection |
Use Scenario: Suppressing inductive kickback from buck converter MOSFET switching in constant-current LED drivers. IC Role / Device Role / Timing Role: Unidirectional TVS across output capacitor to clamp overshoot during MOSFET turn-off transitions. Use Value: 400W rating absorbs single-event energy without thermal runaway; DO-41 package fits standard through-hole layout with 5mm creepage. |
Use Scenario: Secondary-level protection on VBUS line after primary TVS, targeting residual fast-rising ESD events missed by front-end filters. IC Role / Device Role / Timing Role: Low-capacitance supplemental clamp (CJ <100pF at VWM) placed adjacent to USB-C receptacle. Use Value: 13.4V clamping prevents overvoltage on USB PD controller while maintaining <50μA leakage to avoid VBUS discharge during suspend mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ9.0A | VBR = 9.0–10.0V, VC = 14.4V @ 28.7A, same DO-214AC package | Higher clamping voltage reduces margin for 12V logic; surface-mount only | Select when board space constraints require SMD and 14.4V clamping is acceptable for protected ICs |
| ON Semiconductor 1.5KE9.1A | VBR = 8.65–9.55V, VC = 13.4V @ 31A, same DO-201AD package (larger than DO-41) | Same electrical specs but 1.5kW rating - over-specified for 400W use cases; higher cost and footprint | Choose only if legacy 1.5KE footprint compatibility is required or future derating headroom is needed |
Compared with P4KE9.1A, SMAJ9.0A trades lower profile for higher clamping voltage and SMT-only assembly, while 1.5KE9.1A duplicates key parameters but adds unnecessary power rating and package size - making P4KE9.1A optimal for cost-sensitive, through-hole automotive and industrial designs requiring precise 9.1V standoff and 13.4V clamping.
Availability
P4KE9.1A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, LED driver power stages, and USB-C secondary protection requiring stable component supply and AEC-Q101 traceability.
Supply support for P4KE9.1A 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The P4KE series targets cost-effective, high-reliability transient suppression in harsh environments - engineered for robustness under repetitive surge stress and extended temperature operation without parameter drift.
FAQ
What is the breakdown voltage range of the P4KE9.1A?
The P4KE9.1A has a guaranteed breakdown voltage range of 8.65V to 9.55V at 1mA test current (IT), measured per ANSI/IEEE C62.35 standards. This tight 10% tolerance ensures consistent turn-on behavior across production lots and supports precise overvoltage threshold design in safety-critical circuits like automotive ECUs where P4KE9.1A is commonly deployed.
Is the P4KE9.1A suitable for automotive applications?
Yes - the P4KE9.1A is explicitly qualified to AEC-Q101 when ordered with the "H" suffix (e.g., P4KE9.1AH), undergoing stress tests for temperature cycling, mechanical shock, and high-temperature operating life. Even standard P4KE9.1A units share identical die and construction, making them widely used in non-certified automotive sub-systems such as lighting controls and sensor interfaces where P4KE9.1A provides proven field reliability.
What is the maximum clamping voltage of the P4KE9.1A during a surge event?
The P4KE9.1A clamps to a maximum of 13.4V when subjected to its rated 31A peak pulse current (IPPM) under the standard 10/1000μs waveform. This value is measured at the device terminals and represents the highest voltage imposed on downstream circuitry during worst-case transient conditions - a critical parameter for ensuring P4KE9.1A protects 12V-rated ICs without exceeding their absolute maximum ratings.
Does the P4KE9.1A have polarity markings, and how is it installed?
Yes - the P4KE9.1A uses a DO-204AL (DO-41) package with a visible cathode band (typically white or black stripe) indicating the cathode terminal. It must be installed with the cathode connected to the line being protected (e.g., +12V rail) and the anode tied to ground. Reverse installation renders the device ineffective for unidirectional surge suppression, so correct orientation is essential for P4KE9.1A to function as intended.
How does the P4KE9.1A compare to the P4KE9.1 (non-A) variant?
The P4KE9.1A offers tighter breakdown voltage tolerance (8.65–9.55V) versus P4KE9.1 (8.19–10.00V), resulting in more predictable clamping onset and reduced risk of premature conduction. Both share identical package, power rating, and thermal specs, but P4KE9.1A's ±5% VBR improves design margin in precision protection schemes - making P4KE9.1A the preferred choice where consistent threshold behavior is required across temperature and lifetime.
P4KE9.1A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- P4KE
- 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):
- 31A
- 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 FAQ
1.How can I place an order for P4KE9.1A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE9.1A 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 reliable?
The price and inventory of P4KE9.1A 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 is usually 5 days.
3.What payment methods are accepted for P4KE9.1A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE9.1A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE9.1A?
P4KE9.1A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE9.1A 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?
For technical support, including P4KE9.1A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE9.1A requirements.
6.How does Aetrix verify that P4KE9.1A is sourced from the original manufacturer or authorized distributors?
All P4KE9.1A 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 meets industry standards.
7.What is the process for return or replacement of P4KE9.1A?
All P4KE9.1A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE9.1A, 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 part is unused and in its original packaging.
Return procedure for P4KE9.1A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE9.1A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
