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Vishay General Semiconductor - Diodes Division P4SMA24AHE3_A/I
- Part No.:
- P4SMA24AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24AHE3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,921
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Product details
Overview
P4SMA24AHE3_A/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 = 20.5 V), 22.8–25.2 V breakdown (VBR at 1 mA), and 33.2 V clamping voltage (VC) at 12.0 A peak pulse current (IPPM) under 10/1000 µs waveform. It delivers 400 W peak pulse power, supports automotive-grade reliability via AEC-Q101 qualification, and protects MOSFETs and sensor signal lines in industrial power supplies.
For engineers reviewing the P4SMA24AHE3_A/I datasheet, P4SMA24AHE3_A/I pinout, P4SMA24AHE3_A/I application, or P4SMA24AHE3_A/I equivalent, key selection criteria include clamping performance at 12 A, thermal resistance (RθJA = 120 °C/W), unidirectional polarity with cathode band marking, and compliance with UL 497B and J-STD-020 MSL Level 1.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold (22.8–25.2 V), it avalanches rapidly to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ps).
Designed for 10/1000 µs surge waveforms, it sustains 400 W peak pulse power at TA = 25 °C on 5.0 mm × 5.0 mm copper pads, derating linearly above 25 °C per Fig. 2. Junction temperature range spans –65 °C to +150 °C, with maximum forward surge current (IFSM) of 40 A (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1 mA - Confirmed avalanche initiation range; ensures predictable clamping onset across production lot. |
| VC (Clamping Voltage) | 33.2 V at IPPM = 12.0 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - Surge energy-handling capacity under standard 10/1000 µs waveform; enables protection against IEC 61000-4-5 Level 4 transients. |
| ID (Reverse Leakage) | <1.0 µA at VWM - Minimal standby current draw; avoids loading sensitive reference or bias networks. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive or high-ambient industrial environments. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient; informs PCB copper pad sizing and airflow requirements for sustained power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., VCC or signal); conducts avalanche current to ground during overvoltage events. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return; completes shunt path for surge current diversion. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces; supports 15-year lifecycle reliability. |
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in 12 V/24 V vehicle electrical systems and industrial motor drives without degradation. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection fidelity. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without preconditioning or special handling. |
| UL 497B recognized (QVGQ2) | Meets safety standards for telecom and industrial signal-line protectors; simplifies end-equipment certification. |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point, clamping surges before they reach signal conditioning ICs. Use Value: Limits voltage excursion to ≤33.2 V during 12 A transients, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input terminals of programmable logic controllers exposed to relay coil flyback and ESD in factory automation cabinets. IC Role / Device Role / Timing Role: Primary front-end protection device on 24 V DC input channels, coordinated with upstream fuses and filtering. Use Value: Absorbs up to 400 W surge energy while maintaining <1 µA leakage, preserving input logic thresholds and long-term channel accuracy. |
| Telecom Line Interface Protection | Consumer Power Adapter Output Clamping |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on RJ45 ports in outdoor access points and base stations. IC Role / Device Role / Timing Role: Unidirectional TVS on DC bias lines (e.g., MDI pairs), working in concert with common-mode chokes and GDTs. Use Value: Clamps transients within 1 ns to ≤33.2 V, meeting ITU-T K.21 basic protection level for telecommunications infrastructure. |
Use Scenario: Preventing overvoltage damage to USB-C PD controllers and secondary-side synchronous rectifiers during AC line fault conditions. IC Role / Device Role / Timing Role: Secondary-side output clamp on 5–20 V regulated rails, activated only during abnormal overvoltage events. Use Value: Maintains 20.5 V standoff while delivering precise 33.2 V clamping, avoiding false triggering during normal load transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5A | Same SMA package, identical VWM (20.5 V) and VC (33.2 V), but rated for 400 W at 25 °C only (no AEC-Q101 qualification). | Lacks automotive qualification; suitable for commercial/industrial use where AEC-Q101 is not mandated. | Select SMAJ24A-E3/5A when cost sensitivity outweighs automotive compliance requirements. |
| 1.5SMC24A | Higher package thermal mass (DO-214AB), RθJA = 60 °C/W vs. 120 °C/W; same electrical specs but larger footprint (7.11 mm × 6.22 mm). | Better thermal performance under sustained surge duty cycles; requires larger PCB area and different stencil design. | Choose 1.5SMC24A when board space permits and higher thermal robustness is needed for repetitive surge environments. |
Compared with SMAJ24A-E3/5A, P4SMA24AHE3_A/I adds AEC-Q101 validation for automotive deployment; versus 1.5SMC24A, it trades thermal margin for compact SMA footprint-critical for dense sensor modules and miniaturized power adapters.
Availability
P4SMA24AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, telecom line protection, and consumer power adapter output clamping requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant sourcing.
Supply support for P4SMA24AHE3_A/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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and optoelectronics, with emphasis on high-reliability, high-efficiency components for automotive, industrial, and computing markets.
The P4SMA Series targets surface-mount transient suppression in space-constrained, high-surge environments; its AEC-Q101 variants like P4SMA24AHE3_A/I were engineered specifically for automotive electronics protection with zero derating up to +125 °C ambient.
FAQ
What is the clamping voltage of P4SMA24AHE3_A/I at its rated peak pulse current?
The clamping voltage (VC) of P4SMA24AHE3_A/I is 33.2 V when subjected to its specified peak pulse current (IPPM) of 12.0 A under the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and represents the maximum voltage that will appear across the device-and thus be imposed on the protected circuit-during such a transient event. The P4SMA24AHE3_A/I maintains this clamping performance consistently across its qualified temperature range.
Is P4SMA24AHE3_A/I suitable for automotive applications?
Yes, P4SMA24AHE3_A/I is explicitly AEC-Q101 qualified, as confirmed by its "HE3" suffix and documentation in Vishay's P4SMA series datasheet (Rev. 09-Jan-2024). It meets the stress test requirements for automotive-grade discrete semiconductors-including temperature cycling, humidity bias, and mechanical shock-and is rated for operation from –65 °C to +150 °C junction temperature. This makes P4SMA24AHE3_A/I appropriate for engine control, body electronics, and ADAS sensor protection.
What does the "_A/I" suffix mean in P4SMA24AHE3_A/I?
The "_A/I" suffix in P4SMA24AHE3_A/I indicates two specific attributes: "A" denotes the revision level (per ordering table footnote 1), confirming AEC-Q101 qualification for the 6.8 V to 220 V voltage range; "I" specifies the packaging format-7500-piece quantity on 13-inch plastic tape and reel. This matches Vishay's documented delivery mode for P4SMA24AHE3_A/I in the Ordering Information section of datasheet 88367.
How does the thermal resistance of P4SMA24AHE3_A/I affect PCB layout?
P4SMA24AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. To maintain safe junction temperatures during repetitive surges, designers must allocate adequate copper area-increasing pad size or adding internal ground planes reduces RθJA. Layouts ignoring this spec risk exceeding the +150 °C TJ max., accelerating parametric drift or catastrophic failure of the P4SMA24AHE3_A/I.
Does P4SMA24AHE3_A/I have bidirectional capability?
No, P4SMA24AHE3_A/I is a unidirectional TVS diode, as indicated by its "A" suffix (vs. "CA" for bidirectional types) and explicit listing under "UNI" in the Electrical Characteristics table. Its cathode band marks the terminal that must be connected toward the protected line; reverse connection would block conduction during positive transients. For bidirectional protection, engineers must select a part like P4SMA24CAHE3_A/I instead of P4SMA24AHE3_A/I.
P4SMA24AHE3_A/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:
- Active
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA24AHE3_A/I FAQ
1.How can I place an order for P4SMA24AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24AHE3_A/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 P4SMA24AHE3_A/I reliable?
The price and inventory of P4SMA24AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA24AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24AHE3_A/I?
P4SMA24AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24AHE3_A/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 P4SMA24AHE3_A/I?
For technical support, including P4SMA24AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA24AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA24AHE3_A/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 P4SMA24AHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA24AHE3_A/I?
All P4SMA24AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24AHE3_A/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 P4SMA24AHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA24AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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