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Vishay General Semiconductor - Diodes Division P4SMA24CAHE3_A/H
- Part No.:
- P4SMA24CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24CAHE3_A/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,427
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Product details
Overview
P4SMA24CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 24 V standoff voltage (VWM), 25.2 V minimum breakdown voltage (VBR), 33.2 V maximum clamping voltage (VC) at 12 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the P4SMA24CAHE3_A/H datasheet, P4SMA24CAHE3_A/H pinout, P4SMA24CAHE3_A/H application, or P4SMA24CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.38), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The P4SMA24CAHE3_A/H operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 20.5 V), while thermal resistance (RθJA = 120 °C/W) supports operation up to TJ = 150 °C under defined PCB pad conditions.
It delivers 400 W peak pulse power per 10/1000 μs waveform when mounted on 0.2" × 0.2" copper pads, with derating above TA = 25 °C per Figure 2. The device meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements, and its AEC-Q101 qualification confirms suitability for automotive electronics environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 22.8 V to 25.2 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 33.2 V at 12.0 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W - Surge energy handling capacity with standard 10/1000 μs waveform; validates robustness against IEC 61000-4-5 Level 3 surges. |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | 150 °C - Maximum junction temperature; enables use in under-hood automotive and industrial ambient environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | One terminal of symmetrical avalanche junction; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Cathode | Transient return path (bidirectional) | Second terminal of symmetrical junction; connects to same line or complementary line (e.g., CAN_L or RS-485 B); no cathode band marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or AC-coupled lines (e.g., USB D+/D−, RS-485, CAN bus) without polarity concerns. |
| 400 W peak pulse power | Supports IEC 61000-4-5 4 kV surge immunity (line-to-ground) when properly laid out on 5.0 mm × 5.0 mm copper pads. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| MSL Level 1 (260 °C peak) | Allows standard reflow soldering without pre-baking; simplifies manufacturing integration in high-volume SMT lines. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage drift over time, and resistance to humidity-induced degradation. |
Applications
| Automotive Sensor Interface Protection | Industrial RS-485 Communication Line |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤33.2 V during 12 A surges, preventing ADC saturation and protecting 3.3 V/5 V input stages per ISO 7637-2 Pulse 1/2/5a. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., SN65HVD230) in factory automation PLC backplanes subject to ground bounce and cable ESD. IC Role / Device Role / Timing Role: Line-to-line (A–B) and line-to-ground TVS on differential bus pair. Use Value: Clamps common-mode surges to <33.2 V while maintaining signal integrity up to 10 Mbps due to low junction capacitance (~200 pF at 0 V). |
| Consumer USB 2.0 Data Line | Telecom DSL Line Interface |
Use Scenario: ESD protection for USB 2.0 D+ and D− lines in set-top boxes and smart home hubs per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at USB connector, before series impedance or EMI filter. Use Value: Responds in <1 ns to clamp ESD events to <33.2 V, preserving signal rise/fall times and meeting USB 2.0 eye diagram compliance. |
Use Scenario: Overvoltage protection on ADSL/VDSL line drivers interfacing twisted-pair telephone lines exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary line-to-line TVS on tip/ring pair upstream of transformer coupling. Use Value: Handles 400 W surge energy per 10/1000 μs waveform, enabling compliance with ITU-T K.21 basic protection level for telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Higher 600 W PPPM rating; larger SMB (DO-214AA) package (4.58 mm × 3.94 mm); RθJA = 100 °C/W. | Better suited for higher-energy surges but requires larger PCB footprint and different pad layout. | Select SMBJ24CA when surge energy exceeds 400 W or thermal dissipation demands lower RθJA. |
| 1.5KE24CA | Through-hole DO-15 package; 1500 W PPPM; higher VC (38.9 V); not AEC-Q101 qualified. | Used in legacy power supply inputs or non-automotive industrial equipment where board space and qualification are secondary. | Choose 1.5KE24CA only for cost-sensitive, non-SMT, non-automotive designs requiring higher peak power. |
Compared with SMBJ24CA and 1.5KE24CA, the P4SMA24CAHE3_A/H offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and verified 400 W surge capability - making it preferred for space-constrained automotive and industrial SMT designs where reliability and manufacturability are critical.
Availability
P4SMA24CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB 2.0 ports, telecom DSL line protection, and other applications requiring stable component supply with AEC-Q101 assurance and SMT compatibility.
Supply support for P4SMA24CAHE3_A/H 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 TVS devices with emphasis on reliability, precision, and automotive-grade qualification.
The P4SMA Series is engineered for robust transient suppression in automotive, industrial, and communications systems - delivering standardized bidirectional clamping performance across 6.8 V to 220 V VWM range in compact SMA packages.
FAQ
What is the clamping voltage of P4SMA24CAHE3_A/H at its rated peak pulse current?
The P4SMA24CAHE3_A/H has a maximum clamping voltage (VC) of 33.2 V at 12.0 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured with the device mounted on 0.2" × 0.2" copper pads and represents the upper voltage limit imposed on protected circuitry during surge events. The P4SMA24CAHE3_A/H maintains this clamping performance consistently due to its glass-passivated junction and AEC-Q101 validated construction.
Is P4SMA24CAHE3_A/H suitable for automotive applications?
Yes, P4SMA24CAHE3_A/H is AEC-Q101 qualified and specifically designated for automotive use via the "HE3" suffix and revision code "A/H". It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 requirements. The P4SMA24CAHE3_A/H is deployed in engine control units, body control modules, and ADAS sensor interfaces where reliability under harsh thermal and electrical conditions is mandatory.
What does the "CA" suffix indicate in P4SMA24CAHE3_A/H?
The "CA" suffix in P4SMA24CAHE3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA24A), the P4SMA24CAHE3_A/H has no cathode marking and functions identically in either orientation, making it ideal for differential signal lines such as CAN, RS-485, and USB data pairs.
What is the maximum operating junction temperature for P4SMA24CAHE3_A/H?
The P4SMA24CAHE3_A/H has a maximum junction temperature (TJ max.) of +150 °C, as specified in its absolute maximum ratings. This rating enables reliable operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. Derating of peak pulse power begins above TA = 25 °C per Figure 2 in the datasheet, and thermal design must account for RθJA = 120 °C/W under standard mounting conditions.
How does P4SMA24CAHE3_A/H differ from the non-AEC-Q101 P4SMA24CA-E3/61?
The P4SMA24CAHE3_A/H differs from P4SMA24CA-E3/61 primarily in qualification and traceability: P4SMA24CAHE3_A/H carries AEC-Q101 certification, uses HE3 suffix, and includes revision code "A/H" indicating automotive-grade lot control and enhanced reliability screening. In contrast, P4SMA24CA-E3/61 is commercial-grade only, lacks automotive qualification, and is intended for non-safety-critical consumer or industrial applications. Both share identical electrical specs and SMA packaging.
P4SMA24CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA24CAHE3_A/H FAQ
1.How can I place an order for P4SMA24CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24CAHE3_A/H 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 P4SMA24CAHE3_A/H reliable?
The price and inventory of P4SMA24CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA24CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24CAHE3_A/H?
P4SMA24CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24CAHE3_A/H 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 P4SMA24CAHE3_A/H?
For technical support, including P4SMA24CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24CAHE3_A/H requirements.
6.How does Aetrix verify that P4SMA24CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA24CAHE3_A/H 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 P4SMA24CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA24CAHE3_A/H?
All P4SMA24CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24CAHE3_A/H, 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 P4SMA24CAHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA24CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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