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Vishay General Semiconductor - Diodes Division P4SMA24AHM3/I
- Part No.:
- P4SMA24AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24AHM3/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,278
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Product details
Overview
P4SMA24AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 24 V standoff voltage (VWM), 25.2 V maximum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It provides clamping protection for ICs, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching transients and ESD.
For engineers reviewing the P4SMA24AHM3/I datasheet, P4SMA24AHM3/I pinout, P4SMA24AHM3/I application, or P4SMA24AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, 33.2 V maximum clamping voltage at 12 A IPPM, low 1.0 µA reverse leakage at VWM, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity rating.
Technical Context
The P4SMA24AHM3/I operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to limit transient overvoltage before damage occurs. Its clamping action begins at VBR = 22.8–25.2 V (IT = 1.0 mA) and sustains 12.0 A peak pulse current under standardized 10/1000 µs waveform.
Designed for surface-mount automated assembly, it features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability requirements. The device is rated for TJ = –65 °C to +150 °C and derates linearly above TA = 25 °C per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 22.8–25.2 V at IT = 1.0 mA - Avalanche onset range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 33.2 V at IPPM = 12.0 A - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for downstream component survivability |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Energy-handling capacity for single transient events; enables robust protection in noisy environments |
| ID (Reverse Leakage) | 1.0 µA at VWM = 20.5 V - Ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max. | +150 °C - Enables reliable operation in under-hood automotive and high-temperature industrial enclosures |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional TVS configuration | Provides return path for surge current during clamping; must be routed with low-inductance trace to minimize overshoot |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., signal, power rail) | Defines polarity-sensitive placement; band marking ensures correct orientation during automated placement and inspection |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports high-energy transients from relay coil decay or motor commutation without degradation |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics including ADAS sensors, body control modules, and infotainment power rails |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and enables use in green manufacturing and export-controlled applications |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without pre-baking or special handling |
| Glass-passivated junction | Ensures stable electrical characteristics and long-term reliability under thermal and humidity stress |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to clamp positive transients while blocking DC bias. Use Value: Limits induced voltage to ≤33.2 V during 12 A surge, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to relay contact bounce and inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive 400 W surges without parameter drift. Use Value: Maintains <1 µA leakage at 20.5 V, ensuring clean logic-level detection and eliminating false triggering in high-noise factory environments. |
| Telecom Power Rail Protection | Consumer Device USB Port Protection |
Use Scenario: Secondary overvoltage protection on 24 V/48 V telecom power distribution boards upstream of DC-DC converters. IC Role / Device Role / Timing Role: Fast-clamping TVS in parallel with bulk capacitance to suppress fast-rising lightning-induced surges. Use Value: Sub-1 ns response and 33.2 V clamping prevent overvoltage propagation to sensitive PMICs and FPGAs downstream. |
Use Scenario: ESD and cable discharge protection on VBUS lines of USB 2.0 host ports in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Unidirectional suppressor between 5 V rail and chassis ground, meeting IEC 61000-4-2 Level 4 (±15 kV air). Use Value: Halogen-free construction supports consumer safety certifications; 20.5 V VWM avoids interference with 5 V nominal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-E3/52 (Vishay) | Higher 600 W PPPM, SMB (DO-214AA) package, 38.9 V VC at 17.3 A IPPM | Better suited for higher-energy transients; larger footprint requires PCB redesign | Select when surge energy exceeds 400 W or when existing layout accommodates SMB package |
| 1.5KE24A (ON Semiconductor) | Through-hole DO-201 package, same VWM/VBR/VC specs, 400 W rating, no AEC-Q101 or halogen-free certification | Limited to non-automotive, non-RoHS-restricted designs; incompatible with SMT-only production | Choose only for legacy through-hole systems where reflow compatibility and automotive qualification are not required |
Compared with SMBJ24A-E3/52, P4SMA24AHM3/I offers smaller footprint and automotive qualification but lower surge margin; versus 1.5KE24A, it delivers SMT scalability and regulatory compliance at the cost of leaded assembly support.
Availability
P4SMA24AHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power distribution requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for P4SMA24AHM3/I 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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets surface-mount transient suppression in space-constrained, high-reliability applications-designed specifically for automotive, industrial, and telecom systems needing AEC-Q101-qualified, low-leakage, fast-response TVS diodes.
FAQ
What is the clamping voltage of P4SMA24AHM3/I at its rated peak pulse current?
The P4SMA24AHM3/I has a maximum clamping voltage (VC) of 33.2 V at 12.0 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value ensures protected circuits remain within safe voltage limits during transient events. The P4SMA24AHM3/I's low clamping ratio (VC/VBR ≈ 1.32) reflects efficient avalanche performance and minimal voltage overshoot.
Is P4SMA24AHM3/I suitable for automotive applications?
Yes, P4SMA24AHM3/I is AEC-Q101 qualified and carries the HM3 suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and ESD-to meet automotive reliability requirements. The P4SMA24AHM3/I is commonly deployed in body electronics, ADAS sensor interfaces, and infotainment power rails.
What does the "HM3" suffix mean in P4SMA24AHM3/I?
The "HM3" suffix in P4SMA24AHM3/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3/M3 versions and confirms compliance with automotive environmental and reliability standards. The "I" denotes 7500-unit tape-and-reel packaging on 13-inch reels, optimized for high-volume SMT assembly of the P4SMA24AHM3/I.
How does P4SMA24AHM3/I compare to bidirectional TVS diodes like P4SMA24CA?
P4SMA24AHM3/I is unidirectional and intended for DC-coupled lines referenced to ground, whereas P4SMA24CA is bidirectional for AC or floating signal lines. The P4SMA24AHM3/I offers tighter VBR tolerance (22.8–25.2 V vs. ±5 % for CA variants) and lower leakage, but cannot suppress negative transients. Use P4SMA24AHM3/I where polarity is fixed and ground-referenced protection is needed.
What is the thermal resistance of P4SMA24AHM3/I, and how does it affect layout?
The P4SMA24AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain safe operation at full 400 W surge rating, PCB layout must use minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Exceeding TJ = 150 °C risks parametric shift; the P4SMA24AHM3/I's thermal design requires careful copper area allocation and airflow consideration in sealed enclosures.
P4SMA24AHM3/I 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA24AHM3/I FAQ
1.How can I place an order for P4SMA24AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24AHM3/I 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 P4SMA24AHM3/I reliable?
The price and inventory of P4SMA24AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24AHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA24AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24AHM3/I?
P4SMA24AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24AHM3/I 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 P4SMA24AHM3/I?
For technical support, including P4SMA24AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24AHM3/I requirements.
6.How does Aetrix verify that P4SMA24AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA24AHM3/I 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 P4SMA24AHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA24AHM3/I?
All P4SMA24AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24AHM3/I, 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 P4SMA24AHM3/I part is unused and in its original packaging.
Return procedure for P4SMA24AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA24AHM3/I Tags
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