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Vishay General Semiconductor - Diodes Division P4KA9.1HE3/73
- Part No.:
- P4KA9.1HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KA9.1HE3/73.pdf
- Description:
- TVS DIODE 7.37VWM 13.8VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,246
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Product details
Overview
P4KA9.1HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, featuring 9.1 V breakdown voltage (VBR), 13.8 V clamping voltage (VC) at 29.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for engine control units and sensor protection in harsh environments.
For engineers reviewing the P4KA9.1HE3/73 datasheet, P4KA9.1HE3/73 pinout, P4KA9.1HE3/73 application, or P4KA9.1HE3/73 equivalent, this page delivers verified electrical parameters, automotive reliability context, thermal derating behavior, and direct alternatives for ESD/surge protection design in automotive powertrain and body electronics.
Technical Context
The P4KA9.1HE3/73 employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress, with low incremental surge resistance and fast response time (<1 ns) to suppress transients induced by inductive load switching. Its 185 °C maximum junction temperature and 0.068 %/°C VBR temperature coefficient support operation in under-hood automotive environments.
Designed exclusively as a unidirectional device, it exhibits 7.37 V stand-off voltage (VWM) and ≤10 µA reverse leakage at VWM (TJ = 25 °C), enabling reliable DC blocking while maintaining low standby power loss in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 8.19–10.0 V at 1 mA test current - defines precise conduction onset for overvoltage protection |
| Clamping Voltage VC | 13.8 V at 29.0 A IPPM (10/1000 µs) - limits downstream voltage stress during surge events |
| Peak Pulse Power PPPM | 400 W (10/1000 µs waveform, 0.01 % duty cycle) - sustains high-energy transients without failure |
| Operating Temperature Range | −65 °C to +185 °C - qualified for under-hood automotive placement per AEC-Q101 |
| Surge Current IPPM | 29.0 A (10/1000 µs) - withstands typical ISO 7637-2 pulse 1 and pulse 3a/b waveforms |
| Stand-off Voltage VWM | 7.37 V - ensures no conduction during normal 12 V system operation with margin |
| Reverse Leakage ID | ≤10 µA at VWM, TJ = 25 °C - minimizes quiescent current draw in always-on circuits |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with matte tin-plated leads compliant with J-STD-002 and JESD22-B102; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected circuit ground or low-side return path |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 12 V rail or signal trace) to shunt surge energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across 1000+ surge cycles without parameter drift |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and surge endurance per stress test plan |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., load dump, inductive kick) |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability for safety-critical modules |
| 10/1000 µs waveform rating | Aligned with ISO 7637-2 and SAE J1113-11 standards for automotive transient immunity testing |
Applications
| Engine Control Unit Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppresses load-dump transients (up to 60 V, 400 ms) and inductive switching spikes on 12 V supply rails feeding microcontrollers and drivers in ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and local regulator input to clamp surges before LDO or DC/DC stage. Use Value: Prevents latch-up or permanent damage to MCUs like NXP S32K series operating at 185 °C junction limit. |
Use Scenario: Protects analog outputs of pressure, temperature, and position sensors exposed to cable-borne transients in chassis harnesses. IC Role / Device Role / Timing Role: Clamps ESD (IEC 61000-4-2) and coupled noise on 0–5 V or 0.5–4.5 V ratiometric sensor outputs. Use Value: Maintains signal integrity below 13.8 V clamping threshold, avoiding ADC saturation or false fault reporting. |
| Body Control Module Power Input | Infotainment System USB/UART Lines |
Use Scenario: Guards 12 V input to BCMs against jump-start surges and alternator ripple-induced spikes during cold cranking. IC Role / Device Role / Timing Role: Primary front-end TVS on main power entry, upstream of fuse and filtering capacitors. Use Value: Withstands 40 A IFSM (8.3 ms half-sine) without bond-wire fusing, ensuring single-event survivability. |
Use Scenario: Shields UART debug lines and USB VBUS traces from hot-plug transients and ESD in head unit assemblies. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS (CJ < 100 pF at VWM) placed inline with data/power lines. Use Value: Enables robust communication up to 2 Mbps without signal edge degradation due to parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A-E3/5AT | Lower PPPM (400 W same), but higher VC = 14.4 V at 27.8 A; SMA package (SMT) vs. DO-41 (through-hole) | Preferred for space-constrained PCBs; requires reflow-compatible layout and lacks axial mechanical robustness | Select when automated assembly and board density outweigh mechanical mounting requirements |
| 1.5KE9.1A | Same DO-204AL package and VBR range, but non-automotive grade; 1500 W PPPM (10/1000 µs), higher VC = 15.3 V at 98.0 A | Used in industrial power supplies; lacks AEC-Q101 qualification and high-temp reliability validation | Select only for non-automotive applications where cost is prioritized over qualification and thermal margin |
Compared with SMAJ9.0A-E3/5AT and 1.5KE9.1A, the P4KA9.1HE3/73 uniquely combines AEC-Q101 qualification, 185 °C operation, and DO-41 mechanical stability-making it the sole choice for production automotive modules requiring long-term under-hood reliability.
Availability
P4KA9.1HE3/73 is available at Aetrix Electronics and suitable for engine control units, automotive sensor interfaces, and body control modules requiring stable component supply with guaranteed automotive-grade traceability and lifecycle continuity.
Supply support for P4KA9.1HE3/73 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 designs and manufactures discrete semiconductors with emphasis on reliability, precision, and application-specific performance for automotive, industrial, and computing markets.
The P4KA9.1HE3/73 belongs to Vishay's automotive TVS diode family engineered specifically for AEC-Q101 compliance and high-temperature transient suppression in 12 V and 24 V vehicle electrical systems.
FAQ
What is the clamping voltage of the P4KA9.1HE3/73 at its rated peak pulse current?
The P4KA9.1HE3/73 has a maximum clamping voltage (VC) of 13.8 V at 29.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain below critical voltage thresholds during surge events. The P4KA9.1HE3/73 maintains this clamping performance across its full operating temperature range.
Is the P4KA9.1HE3/73 suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the P4KA9.1HE3/73 is explicitly AEC-Q101 qualified and designated as high-reliability automotive grade (HE3 suffix). It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and surge endurance-to meet automotive requirements. The P4KA9.1HE3/73 is approved for use in engine control, transmission, and chassis modules where long-term reliability under thermal and electrical stress is mandatory.
What is the maximum operating junction temperature for the P4KA9.1HE3/73?
The P4KA9.1HE3/73 has a maximum junction temperature (TJ) of +185 °C, validated per AEC-Q101. This enables deployment in under-hood locations such as near engines or exhaust manifolds where ambient temperatures exceed 125 °C. Derating curves in the datasheet (Fig. 2) define safe power dissipation limits above 25 °C ambient, ensuring the P4KA9.1HE3/73 remains within thermal limits during sustained operation.
Does the P4KA9.1HE3/73 have bidirectional polarity capability?
No, the P4KA9.1HE3/73 is available in uni-directional polarity only, as confirmed in the Vishay datasheet (Document Number 88364). Its cathode is marked by a color band, and it conducts only when reverse-biased beyond VBR. For AC or bipolar transient protection, a separate bidirectional TVS or back-to-back configuration would be required - the P4KA9.1HE3/73 itself does not support bidirectional operation.
What packaging format is used for the P4KA9.1HE3/73, and is it RoHS compliant?
The P4KA9.1HE3/73 is supplied in DO-204AL (DO-41) axial package with matte tin-plated leads, compliant with J-STD-002 and JESD22-B102 solderability standards. The HE3 suffix confirms RoHS compliance per 2002/95/EC and passes JESD201 Class 2 whisker testing. It is molded in UL 94 V-0 rated epoxy, making the P4KA9.1HE3/73 suitable for safety-critical automotive modules requiring flame-retardant materials.
P4KA9.1HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 29A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
P4KA9.1HE3/73 FAQ
1.How can I place an order for P4KA9.1HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KA9.1HE3/73 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 P4KA9.1HE3/73 reliable?
The price and inventory of P4KA9.1HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KA9.1HE3/73 is usually 5 days.
3.What payment methods are accepted for P4KA9.1HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KA9.1HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KA9.1HE3/73?
P4KA9.1HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KA9.1HE3/73 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 P4KA9.1HE3/73?
For technical support, including P4KA9.1HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KA9.1HE3/73 requirements.
6.How does Aetrix verify that P4KA9.1HE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KA9.1HE3/73 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 P4KA9.1HE3/73 meets industry standards.
7.What is the process for return or replacement of P4KA9.1HE3/73?
All P4KA9.1HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KA9.1HE3/73, 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 P4KA9.1HE3/73 part is unused and in its original packaging.
Return procedure for P4KA9.1HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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