My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA24AHM3_A/I
- Part No.:
- P4SMA24AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24AHM3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,729
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA24AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 24 V standoff voltage (VWM), 25.2 V maximum breakdown voltage (VBR), 33.2 V clamping voltage at 12 A peak pulse current, 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive applications.
For engineers reviewing the P4SMA24AHM3_A/I datasheet, P4SMA24AHM3_A/I pinout, P4SMA24AHM3_A/I application, or P4SMA24AHM3_A/I equivalent, this device is selected for robust ESD and surge protection in automotive ECUs, industrial sensor interfaces, and DC power rail conditioning where low clamping voltage, fast response (<1 ns), and halogen-free RoHS compliance are required.
Technical Context
The P4SMA24AHM3_A/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at 20.5 V), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
It delivers 400 W peak pulse power under standardized 10/1000 µs waveform with 0.01% duty cycle, derating linearly above 25 °C ambient per Fig. 2. Thermal resistance is 120 °C/W junction-to-ambient (on recommended 5.0 mm × 5.0 mm copper pads), enabling reliable 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 operating voltage before conduction begins; defines safe DC/AC working range. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable clamping initiation across production lot. |
| VC (Clamping Voltage) | 33.2 V at 12 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs transient; critical for IC-level overvoltage margining. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability; validated per IEC 61000-4-5 Level 4 surge testing conditions. |
| ID (Reverse Leakage) | <1 µA at 20.5 V - Minimal standby power loss and signal integrity impact in high-impedance sensing paths. |
| TJ max. | 150 °C - Enables deployment in under-hood automotive environments and thermally constrained industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥8 kV); suffix HM3 denotes halogen-free RoHS compliance. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile (max height 2.29 mm), matte tin-plated leads, UL 94 V-0 molding compound. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential node in unidirectional configuration; enables current flow during positive transients on cathode side. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail or CAN_H); conducts avalanche current when line voltage exceeds VBR relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 A (2 Ω source) on 24 V systems without derating. |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on downstream MOSFETs or microcontrollers during fast transients. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity handling. |
| AEC-Q101 qualified + halogen-free (HM3) | Meets automotive OEM requirements for long-term reliability and environmental compliance in safety-critical modules. |
| Fast response time (<1 ns) | Clamps ESD events (IEC 61000-4-2 ±15 kV contact) before sensitive logic thresholds are exceeded. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V Sensor Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and power supply inputs against load dump and alternator ripple in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and ground, clamping transients before they reach LDOs and MCU I/O. Use Value: Maintains system uptime by preventing latch-up or gate oxide damage during 12 V/24 V system switching events. |
Use Scenario: Shielding analog output lines of pressure/temperature transmitters from induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Low-leakage TVS on 4–20 mA loop outputs, suppressing common-mode spikes without affecting precision current sourcing. Use Value: Preserves measurement accuracy by limiting voltage excursion to <33.2 V during 1 kV/500 A surge injection tests. |
| DC Power Rail Protection (24 V) | Automotive Camera Module Power Input |
Use Scenario: Safeguarding input stage of buck converters feeding ADAS domain controllers from ISO 7637-2 pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Primary clamping device upstream of filter inductors and input capacitors; coordinates with MOVs for multi-stage protection. Use Value: Reduces required bulk capacitance by limiting peak rail voltage to 33.2 V, easing thermal design of downstream regulators. |
Use Scenario: Front-end protection for 24 V camera power input exposed to hot-swap and cable discharge events in rear-view systems. IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional TVS mounted directly at connector, shunting surge energy to chassis ground. Use Value: Eliminates field returns due to image corruption or reset-on-surge by ensuring sub-100 ns response to 8 kV ESD contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3_A/I | Same VWM (20.5 V), identical SMA package, but rated for 400 W with 1.5x higher IPPM (18.2 A) and slightly higher VC (35.5 V). | Better suited for higher-energy surges (e.g., ISO 7637-2 pulse 5a), but less optimal for space-constrained layouts requiring minimal clamping overshoot. | Select SMAJ24AHE3_A/I when peak surge current exceeds 12 A; retain P4SMA24AHM3_A/I for tighter VC budget and halogen-free requirement. |
| 1.5SMC24AHM3_A/I | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VC specs, but 3× footprint area and 2.5× weight. | Used in high-power industrial motor drives where PCB real estate allows larger devices and energy levels exceed 400 W. | Choose 1.5SMC24AHM3_A/I only if system-level surge testing requires >400 W rating; P4SMA24AHM3_A/I remains preferred for compact automotive modules. |
Compared with SMAJ24AHE3_A/I and 1.5SMC24AHM3_A/I, the P4SMA24AHM3_A/I offers the optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and precise 33.2 V clamping-making it the default choice for space- and reliability-critical 24 V automotive and industrial protection nodes.
Availability
P4SMA24AHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial 24 V sensor interfaces, and DC power rail protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA24AHM3_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 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 is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems-delivering consistent clamping performance, AEC-Q101 validation, and surface-mount scalability across 6.8 V to 540 V standoff ranges.
FAQ
What is the clamping voltage of the P4SMA24AHM3_A/I at its rated peak pulse current?
The P4SMA24AHM3_A/I has a maximum clamping voltage (VC) of 33.2 V at 12 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value is guaranteed across temperature and production lot, and defines the upper voltage limit imposed on protected circuits during surge events. The P4SMA24AHM3_A/I maintains this clamping performance while operating within its 150 °C junction temperature limit.
Is the P4SMA24AHM3_A/I suitable for automotive applications?
Yes, the P4SMA24AHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction-meeting stringent automotive reliability requirements. It is explicitly rated for under-hood and body-control module use, with validated performance across -65 °C to +150 °C junction temperature range and robust ESD immunity (HBM ≥8 kV). The P4SMA24AHM3_A/I is commonly deployed in BCMs, camera modules, and ADAS power supplies.
What does the "HM3" suffix mean in P4SMA24AHM3_A/I?
The "HM3" suffix in P4SMA24AHM3_A/I denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, with matte tin-plated leads solderable per J-STD-002. It distinguishes this variant from commercial-grade E3/M3 versions and confirms compliance with automotive environmental standards. The P4SMA24AHM3_A/I also includes AEC-Q101 qualification, making HM3 a key identifier for automotive-grade deployment.
How does the P4SMA24AHM3_A/I compare to bidirectional TVS diodes?
The P4SMA24AHM3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., 24 V rail to ground), offering lower leakage and sharper knee characteristics than bidirectional equivalents. Bidirectional variants like P4SMA24CA require no polarity consideration but exhibit higher ID and reduced forward-voltage margin. The P4SMA24AHM3_A/I is not interchangeable with bidirectional types without circuit redesign.
What is the thermal resistance of the P4SMA24AHM3_A/I, and how does it affect layout?
The P4SMA24AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under 400 W pulse conditions, PCB layout must provide adequate copper area and minimize trace length. The P4SMA24AHM3_A/I thermal performance is optimized for standard SMT reflow profiles and does not require external heatsinking in most automotive and industrial applications.
P4SMA24AHM3_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:
- 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_A/I FAQ
1.How can I place an order for P4SMA24AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24AHM3_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 P4SMA24AHM3_A/I reliable?
The price and inventory of P4SMA24AHM3_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 P4SMA24AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA24AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24AHM3_A/I?
P4SMA24AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24AHM3_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 P4SMA24AHM3_A/I?
For technical support, including P4SMA24AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA24AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA24AHM3_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 P4SMA24AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA24AHM3_A/I?
All P4SMA24AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24AHM3_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 P4SMA24AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA24AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA24AHM3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
