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Vishay General Semiconductor - Diodes Division P4SMA24AHE3_A/H
- Part No.:
- P4SMA24AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24AHE3_A/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,035
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Product details
Overview
P4SMA24AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping transient overvoltages on power and signal lines. It features a 24 V standoff voltage (VWM), 25.2 V maximum breakdown voltage (VBR), 33.2 V clamping voltage at 12 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the P4SMA24AHE3_A/H datasheet, P4SMA24AHE3_A/H pinout, P4SMA24AHE3_A/H application, or P4SMA24AHE3_A/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under surge conditions, and direct alternatives for ESD and load-switching transient protection design.
Technical Context
The P4SMA24AHE3_A/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (22.8–25.2 V at 1 mA), with fast response time (<1 ns) and low incremental surge resistance to minimize voltage overshoot during transients. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive surge stress.
Rated for 400 W peak pulse power (10/1000 µs), it delivers 12 A peak pulse current (IPPM) while clamping to ≤33.2 V - enabling robust protection of 24 V rail electronics without compromising system-level fault tolerance. Thermal resistance is 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, supporting operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.8 V min / 25.2 V max at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 33.2 V at 12 A IPPM - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; critical for IC voltage tolerance margin. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability per transient event; validated per IEC 61000-4-5 Level 4 compliance paths. |
| ID (Reverse Leakage) | 1.0 µA max at 20.5 V - Ultra-low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and high-temperature industrial enclosures. |
| 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, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and MSL level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR - polarity-critical for unidirectional operation. |
| Anode | Reference/return path | Typically tied to system ground or lower-potential rail; completes conduction path during clamping events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables single-device protection against severe load-dump and inductive switching transients in 24 V systems. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime, even under thermal cycling and humidity stress. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection margin. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power rails from load-dump spikes (ISO 16750-2) and relay coil flyback in door module actuators. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V supply and local LDO input, clamping surges before they reach sensitive regulators. Use Value: Limits transient voltage to ≤33.2 V, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies downstream. |
Use Scenario: Shields 24 V digital input channels from field-wiring induced transients (IEC 61000-4-4/5) in factory automation I/O modules. IC Role / Device Role / Timing Role: Front-end protection device on optocoupler input side, absorbing surge energy before isolation barrier. Use Value: Maintains <1 µA leakage at 20.5 V, ensuring clean signal detection without false triggering in high-impedance sensing circuits. |
| Telecom Power Supply Surge Protection | Automotive Sensor Signal Line Protection |
Use Scenario: Safeguards DC-DC converter inputs in PoE-powered telecom equipment against lightning-induced surges on 48 V distribution lines. IC Role / Device Role / Timing Role: Primary clamping device on bulk input rail, coordinated with upstream MOVs for staged energy handling. Use Value: Delivers 400 W pulse rating with 120 °C/W RθJA, allowing compact layout without forced-air cooling in sealed enclosures. |
Use Scenario: Protects analog outputs of pressure/temperature sensors in engine bay against ESD (IEC 61000-4-2) and alternator ripple coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) placed directly at connector interface, minimizing stub length. Use Value: Clamps 8 kV contact ESD to <33.2 V within <1 ns, preserving ADC reference stability and measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5A | Same VWM (20.5 V), identical SMA package, but rated for 400 W with 10/1000 µs waveform and 12 A IPPM - no AEC-Q101 qualification. | Commercial-grade only; not approved for automotive production use where AEC-Q101 is mandated. | Select when cost-sensitive industrial designs require same clamping performance without automotive qualification. |
| 1.5SMC24A | Higher package thermal resistance (RθJA = 150 °C/W vs. 120 °C/W); same VWM/VBR/VC specs but rated for 1500 W peak power in larger SMC (DO-214AB) package. | Requires larger PCB footprint and different pad layout; better suited for high-energy, low-duty-cycle surges where space permits. | Choose when surge energy exceeds 400 W limits or when board layout allows SMC package for improved thermal dissipation. |
Compared with SMAJ24A-E3/5A, P4SMA24AHE3_A/H adds AEC-Q101 qualification for automotive use without changing clamping behavior; versus 1.5SMC24A, it trades higher power rating for smaller SMA footprint and lower thermal resistance on minimal copper pads.
Availability
P4SMA24AHE3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, telecom power supply surge suppression, and sensor interface hardening requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for P4SMA24AHE3_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, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The P4SMA Series targets surface-mount transient suppression in space-constrained, high-reliability applications - engineered specifically for AEC-Q101 compliance, low-profile assembly, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of the P4SMA24AHE3_A/H at its rated peak pulse current?
The P4SMA24AHE3_A/H clamps to a maximum of 33.2 V at its rated peak pulse current of 12 A (10/1000 µs waveform). This value is measured under standardized test conditions with 0.2" × 0.2" copper pads and represents the upper limit of voltage imposed on the protected circuit during surge events - a key parameter for verifying compatibility with downstream IC voltage tolerances.
Is the P4SMA24AHE3_A/H qualified for automotive applications?
Yes, the P4SMA24AHE3_A/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD, making P4SMA24AHE3_A/H suitable for automotive body electronics, infotainment power rails, and sensor interfaces where reliability under harsh environmental conditions is mandatory.
What does the "_A/H" suffix mean in P4SMA24AHE3_A/H?
The "_A/H" suffix in P4SMA24AHE3_A/H indicates revision level "A" and packaging format "H" - a 7-inch diameter plastic tape-and-reel with 1800 units per reel. The "HE3" portion confirms RoHS-compliant, AEC-Q101 qualified construction, while "A" denotes the initial revision grade for the P4SMA24A family per Vishay's ordering nomenclature.
How does the thermal performance of P4SMA24AHE3_A/H compare to larger-package TVS diodes?
The P4SMA24AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads - lower than many SMC-packaged alternatives (e.g., 1.5SMC24A at 150 °C/W). This enables more efficient heat dissipation in dense layouts, though its 400 W peak power rating remains fixed by package size and material limits, unlike higher-rated SMC variants.
Can P4SMA24AHE3_A/H be used in bidirectional configurations?
No, P4SMA24AHE3_A/H is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix and cathode band marking. Bidirectional operation requires a "CA" variant such as P4SMA24CAHE3_A/H. Using P4SMA24AHE3_A/H in reverse-biased AC signal paths would result in forward conduction and failure - correct polarity alignment is essential for proper transient suppression.
P4SMA24AHE3_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:
- 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/H FAQ
1.How can I place an order for P4SMA24AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24AHE3_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 P4SMA24AHE3_A/H reliable?
The price and inventory of P4SMA24AHE3_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 P4SMA24AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA24AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24AHE3_A/H?
P4SMA24AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24AHE3_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 P4SMA24AHE3_A/H?
For technical support, including P4SMA24AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA24AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA24AHE3_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 P4SMA24AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA24AHE3_A/H?
All P4SMA24AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24AHE3_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 P4SMA24AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA24AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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