My Inquiry
My Account
Taiwan Semiconductor Corporation P4KE91CAH
- Part No.:
- P4KE91CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE91CAH.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,109
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4KE91CAH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It features a 91 V nominal breakdown voltage, 400 W peak pulse power rating at 10/1000 µs waveform, clamping voltage of 131 V at 3.2 A peak pulse current, and AEC-Q101 qualification for under-hood automotive applications.
For engineers reviewing the P4KE91CAH datasheet, P4KE91CAH pinout, P4KE91CAH application, or P4KE91CAH equivalent, this device serves as a robust, low-leakage (≤1 µA at 73.7 V), fast-response (≤5 ns) overvoltage clamp for DC power inputs, CAN bus interfaces, and sensor supply lines subject to ISO 7637-2 and IEC 61000-4-5 transients.
Technical Context
The P4KE91CAH operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its DO-204AL (DO-41) package supports through-hole mounting and meets UL 94V-0 flammability requirements.
It delivers 400 W surge capability per ANSI/IEEE C62.35 standard using a 10/1000 µs double-exponential waveform, with thermal derating above 25°C and maximum junction temperature of 175°C. Reverse leakage remains ≤1 µA at its 73.7 V working stand-off voltage, ensuring minimal standby power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 91 V - defines primary clamping threshold for bidirectional surge events |
| Breakdown Voltage (VBR) | 81.9–100 V @ 1 mA - ensures reliable avalanche initiation across manufacturing tolerance |
| Working Stand-off Voltage (VWM) | 73.7 V - maximum continuous reverse voltage before significant leakage begins |
| Clamping Voltage (VC) | 131 V @ 3.2 A - limits peak transient voltage seen by protected circuitry |
| Peak Pulse Power (PPK) | 400 W - sustains standardized 10/1000 µs surge without failure |
| Reverse Leakage (ID) | ≤1 µA @ 73.7 V - preserves low-power integrity in battery-backed or always-on systems |
| Junction Temperature Range | −55 °C to +175 °C - supports operation in engine compartments and industrial enclosures |
Pinout & Package
Package: DO-204AL (DO-41), axial-lead, glass-passivated, RoHS-compliant, halogen-free molding compound. Cathode band marking not applicable - bidirectional symmetry eliminates polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no directional bias required for bidirectional clamping |
| Lead 1 / Lead 2 | PCB interconnect interface | Standard tinned copper leads compatible with J-STD-002 soldering; 0.300 g unit weight |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| 400 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 50 Ω source impedance |
| ≤5 ns response time (bidirectional) | Clamps transients before sensitive logic or analog circuitry can be damaged |
| UL Recognized (E326243) | Meets safety standards for end-equipment certification in North America |
| Low temperature coefficient (0.106 %/°C) | Ensures stable clamping voltage across −55 °C to +175 °C operating range |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across input rail to shunt ISO 7637-2 Pulse 5a/b energy. Use Value: Limits rail voltage to ≤131 V during 100 V/350 ms load dump, preventing damage to LDOs and microcontrollers. |
Use Scenario: High-speed CAN FD nodes in vehicle body control modules. IC Role / Device Role / Timing Role: Differential-line TVS between CAN_H and CAN_L, referenced to ground. Use Value: Clamps ESD (IEC 61000-4-2 ±8 kV contact) and EFT (IEC 61000-4-4 ±2 kV) without signal distortion or timing skew. |
| Industrial Sensor Interface Protection | AC/DC Adapter Input Stage |
Use Scenario: 4–20 mA loop-powered pressure sensors in factory automation. IC Role / Device Role / Timing Role: Bidirectional clamp across loop supply terminals to absorb induced lightning surges. Use Value: Maintains loop integrity below 73.7 V during normal operation while clamping >1 kV transients to <131 V. |
Use Scenario: Secondary-side rectifier output in offline SMPS for consumer appliances. IC Role / Device Role / Timing Role: Parallel-mounted TVS across bulk capacitor to suppress switching spikes and line surges. Use Value: Prevents overvoltage failure of electrolytic capacitors and downstream PWM controllers during brownout recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | 600 W rating, SMB package (surface-mount), lower clamping voltage (123 V @ 3.27 A) | Better suited for space-constrained PCBs; requires rework for through-hole legacy designs | Select when board area is limited and thermal management allows SMT mounting. |
| 1.5KE91CA | 1500 W rating, DO-201AD package, higher clamping voltage (137 V @ 11 A), slower response (~10 ns) | Higher energy handling but larger footprint and less precise clamping for low-voltage ICs | Select when protecting higher-current power stages where 137 V clamping is acceptable. |
Compared with P4KE91CAH, SMBJ90CA offers superior power density and tighter clamping in a compact SMT form, while 1.5KE91CA provides greater surge margin at the cost of size and response speed-making P4KE91CAH optimal for AEC-Q101-compliant, cost-sensitive through-hole automotive modules.
Availability
P4KE91CAH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and CAN bus subsystems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4KE91CAH 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, and rectifiers, with global distribution and AEC-Q101 validation capabilities.
The P4KE series was developed specifically for automotive-grade transient suppression, emphasizing reliability under thermal stress, low leakage, and consistent clamping performance across wide temperature ranges.
FAQ
What does the 'H' suffix in P4KE91CAH signify?
The 'H' suffix in P4KE91CAH indicates full AEC-Q101 qualification, confirming that the device has passed rigorous automotive stress tests including temperature cycling, high-temperature operating life, and mechanical shock. This makes P4KE91CAH suitable for under-hood applications where reliability under thermal and vibration stress is critical. P4KE91CAH is not just a standard P4KE91CA part with added testing-it is a separately qualified variant with documented test reports per AEC-Q101 Rev D.
Is P4KE91CAH unidirectional or bidirectional, and how is polarity identified?
P4KE91CAH is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions-no cathode band or polarity marking is present. This design eliminates orientation concerns during assembly and enables protection of AC signals or floating differential buses like CAN. Unlike unidirectional P4KE91A variants, P4KE91CAH functions identically regardless of terminal connection order.
What is the maximum clamping voltage of P4KE91CAH under standard test conditions?
The maximum clamping voltage of P4KE91CAH is 131 V, measured at a peak pulse current (IPPM) of 3.2 A using the 10/1000 µs waveform per ANSI/IEEE C62.35. This value represents the upper limit of voltage imposed on protected circuitry during a defined surge event and is guaranteed across the full operating temperature range (−55 °C to +175 °C).
Does P4KE91CAH meet RoHS and halogen-free requirements?
Yes, P4KE91CAH complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, confirmed by material declarations and third-party testing. The DO-204AL (DO-41) package uses lead-free, pure tin-plated leads and UL 94V-0 compliant molding compound-ensuring environmental compliance for global electronics manufacturing without compromising surge robustness.
How does P4KE91CAH compare to P4KE91A in terms of electrical performance?
P4KE91CAH differs from P4KE91A primarily in directionality and qualification: P4KE91CAH is bidirectional with AEC-Q101 qualification, while P4KE91A is unidirectional and not AEC-Q101 rated. Electrically, P4KE91CAH has identical VBR (81.9–100 V), VWM (73.7 V), and VC (131 V) specs-but its bidirectional nature means those values apply in both polarities, unlike P4KE91A's single-direction ratings. Both share the same DO-41 package and 400 W rating.
P4KE91CAH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 3.3A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
P4KE91CAH FAQ
1.How can I place an order for P4KE91CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE91CAH 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 P4KE91CAH reliable?
The price and inventory of P4KE91CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE91CAH is usually 5 days.
3.What payment methods are accepted for P4KE91CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE91CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE91CAH?
P4KE91CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE91CAH 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 P4KE91CAH?
For technical support, including P4KE91CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE91CAH requirements.
6.How does Aetrix verify that P4KE91CAH is sourced from the original manufacturer or authorized distributors?
All P4KE91CAH 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 P4KE91CAH meets industry standards.
7.What is the process for return or replacement of P4KE91CAH?
All P4KE91CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4KE91CAH, 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 P4KE91CAH part is unused and in its original packaging.
Return procedure for P4KE91CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE91CAH 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
