My Inquiry
My Account
Taiwan Semiconductor Corporation P4KE43A
- Part No.:
- P4KE43A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE43A.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,965
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4KE43A from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 43V nominal breakdown voltage (VBR min/max: 40.9–45.2V at 1mA), 36.8V working stand-off voltage (VWM), clamps transients to ≤59.3V at 7.0A peak pulse current, and delivers sub-nanosecond response (<1.0ps from 0V to VBR). It is widely deployed in automotive body control modules to safeguard CAN transceivers against load dump and ISO 7637-2 pulses.
For engineers reviewing the P4KE43A datasheet, P4KE43A pinout, P4KE43A application, or P4KE43A equivalent, key selection criteria include its DO-41 package compatibility, AEC-Q101 qualification (when ordered with 'H' suffix), low leakage (<1μA at 36.8V), and precise clamping performance under 10/1000μs surge conditions - critical for ESD and EFT immunity in industrial sensors and power supply front-ends.
Technical Context
The P4KE43A operates as a silicon avalanche diode with unidirectional polarity, leveraging controlled reverse-biased breakdown to clamp transient energy. Its junction temperature range spans −55°C to +175°C, and it sustains 400W non-repetitive peak pulse power per ANSI/IEEE C62.35 10/1000μs waveform, derating linearly above 25°C ambient.
It exhibits a positive temperature coefficient of VBR (+0.101%/°C), ensuring stable breakdown voltage across operating temperature. With <1μA reverse leakage at VWM and a fast response time (<1.0ps), it provides low-impedance clamping without compromising system standby power integrity in always-on circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 40.9–45.2V - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 36.8V - maximum continuous DC or RMS voltage the device blocks without conduction |
| VC @ IPPM=7.0A | ≤59.3V - clamped voltage during 400W surge, limiting stress on downstream ICs |
| PPK | 400W - peak pulse power handling per 10/1000μs waveform, per IEC 61000-4-5 |
| IR @ VWM | <1μA - ensures negligible standby current draw in battery-powered systems |
| TJ max | +175°C - supports operation in under-hood automotive and high-temperature industrial environments |
| Package | DO-204AL (DO-41) - industry-standard axial leaded package with UL 94V-0 molding compound |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance. Weight: ~0.300g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to circuit ground or low-side return path; forms clamping loop with cathode |
| Cathode | Protected line input | Connected to line being protected (e.g., 24V rail); avalanche conduction occurs from cathode to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | Available with 'H' suffix (e.g., P4KE43AH) for automotive-grade reliability and stress testing compliance |
| Low clamping ratio | VC/VBR ≈ 1.37 - tight margin between standoff and clamping voltages improves system robustness |
| Fast response time | <1.0ps rise-to-breakdown - intercepts ESD and fast transients before sensitive logic is damaged |
| Halogen-free construction | Complies with IEC 61249-2-21 - meets environmental requirements for RoHS-compliant industrial and automotive PCBs |
| UL recognition | UL File #E326243 - validates safety compliance for end-equipment certification (e.g., UL 60950, UL 62368) |
Applications
| Automotive Load Dump Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12V/24V vehicle electrical systems subjected to ISO 7637-2 Pulse 5a (load dump up to 60V, 400ms). IC Role / Device Role: Primary clamping element placed across battery rail input to absorb >400W surge energy. Use Value: Limits rail voltage to ≤59.3V, protecting downstream PMICs, microcontrollers, and CAN transceivers without derating design margins. | Use Scenario: 4–20mA current-loop sensors in factory automation exposed to EFT bursts per IEC 61000-4-4. IC Role / Device Role: Unidirectional TVS mounted at sensor interface connector to shunt fast transients before analog front-end. Use Value: Sub-1μA leakage preserves loop accuracy; 59.3V clamping prevents op-amp saturation and ADC overrange in precision measurement circuits. |
| Power Supply Input Stage | LED Driver Overvoltage Clamp |
Use Scenario: AC/DC adapter secondary-side DC output (e.g., 36V bus) subject to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role: Standoff-rated TVS placed across bulk capacitor to clamp differential-mode transients. Use Value: 36.8V VWM allows full utilization of 36V rail while clamping 400W surges - eliminates need for oversized capacitors or redundant stages. | Use Scenario: Constant-current LED drivers in street lighting exposed to grid switching transients. IC Role / Device Role: Unidirectional TVS connected anode-to-ground, cathode-to-LED string anode to protect driver IC and LEDs. Use Value: Clamps voltage spikes to ≤59.3V, preventing catastrophic failure of GaN FETs and maintaining LED string integrity during line disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Surface-mount SMB package (vs. axial DO-41); same VBR (40.9–45.2V), VC = 69.4V @ 5.8A | Higher clamping voltage (69.4V vs. 59.3V); lower peak pulse current rating (5.8A vs. 7.0A) | Select when board space is constrained and higher clamping margin is acceptable |
| 1.5KE43A | Same DO-41 package; higher PPK = 1500W; VC = 69.4V @ 21.7A; VBR identical (40.9–45.2V) | Designed for higher-energy surges (e.g., lightning); larger thermal mass but same footprint | Select when system-level surge test levels exceed IEC 61000-4-5 Level 4 (4kV/2kV) |
Compared with SMBJ43A and 1.5KE43A, the P4KE43A offers the lowest clamping voltage (59.3V) in the DO-41 form factor, making it optimal for protecting voltage-sensitive loads where margin below 60V is mandatory - such as automotive infotainment power supplies and industrial PLC analog inputs.
Availability
P4KE43A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and LED driver designs requiring stable component supply with consistent DO-41 mechanical fit and AEC-Q101 traceability.
Supply support for P4KE43A 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, with global distribution and AEC-Q101 qualification capability.
The P4KE series is engineered for cost-effective, high-reliability transient suppression in automotive, industrial, and consumer power systems - emphasizing tight parameter distribution, low leakage, and repeatable clamping performance across temperature.
FAQ
What is the maximum clamping voltage of the P4KE43A under standard surge conditions?
The P4KE43A clamps to a maximum of 59.3V when subjected to its rated 7.0A peak pulse current (IPPM), corresponding to a 400W 10/1000μs surge per ANSI/IEEE C62.35. This value is measured at TA = 25°C and represents the upper limit of voltage seen by protected circuitry during transient events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The P4KE43A achieves this with minimal overshoot due to its sub-1.0ps response time.
Is the P4KE43A suitable for bidirectional transient protection?
No, the P4KE43A is a unidirectional TVS diode, intended only for DC or single-polarity signal line protection. Its cathode band marking indicates polarity, and it conducts only when cathode voltage exceeds anode by ≥40.9V. For bidirectional applications (e.g., AC lines or data buses like RS-485), the P4KE43CA variant must be used - which has symmetrical breakdown in both directions and no polarity marking. Using P4KE43A in bidirectional configurations risks failure during negative transients.
Does the P4KE43A meet automotive qualification standards?
The base P4KE43A is not AEC-Q101 qualified; however, the variant P4KE43AH (with 'H' suffix) is fully AEC-Q101 qualified and tested per stress requirements including HTOL, TCT, and ESD. Both share identical electrical parameters (VBR, VC, VWM), but only P4KE43AH carries the qualification documentation required for automotive Tier 1 BOM inclusion. Always verify ordering code suffix when sourcing for automotive applications.
What is the thermal derating behavior of the P4KE43A above 25°C ambient?
The P4KE43A's peak pulse power (PPK) remains constant at 400W up to TA = 25°C, then derates linearly to zero at TJ = 175°C - meaning its effective surge capability decreases as ambient temperature rises. Per Fig.2 in the datasheet, at 75°C ambient, PPK drops to ~300W. This derating must be factored into system-level surge margin calculations, especially in enclosed enclosures or under-hood automotive locations where sustained high temperatures reduce transient energy absorption capacity. The P4KE43A's 175°C TJ max enables operation in these environments, but not at full 400W rating.
How does the P4KE43A compare to the 1.5KE43A in terms of physical and electrical compatibility?
The P4KE43A and 1.5KE43A share identical DO-41 packaging, pinout, VBR (40.9–45.2V), and VWM (36.8V), making them mechanically interchangeable on PCBs. However, the 1.5KE43A is rated for 1500W peak pulse power (vs. 400W) and clamps at 69.4V (vs. 59.3V) - reflecting higher energy handling at the cost of looser voltage control. Thus, while they fit the same footprint, substituting 1.5KE43A for P4KE43A may compromise protection of voltage-sensitive loads unless system surge levels demand the higher rating.
P4KE43A 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 7A
- 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)
P4KE43A FAQ
1.How can I place an order for P4KE43A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE43A 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 P4KE43A reliable?
The price and inventory of P4KE43A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE43A is usually 5 days.
3.What payment methods are accepted for P4KE43A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE43A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE43A?
P4KE43A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE43A 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 P4KE43A?
For technical support, including P4KE43A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE43A requirements.
6.How does Aetrix verify that P4KE43A is sourced from the original manufacturer or authorized distributors?
All P4KE43A 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 P4KE43A meets industry standards.
7.What is the process for return or replacement of P4KE43A?
All P4KE43A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE43A, 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 P4KE43A part is unused and in its original packaging.
Return procedure for P4KE43A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE43A 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 …
