My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA12AHM3_A/H
- Part No.:
- P4SMA12AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA12AHM3_A/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,603
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA12AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 12 V standoff voltage (VWM = 10.2 V), 16.7 V clamping voltage at 24.0 A peak pulse current, and 400 W peak pulse power with 10/1000 µs waveform - designed to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the P4SMA12AHM3_A/H datasheet, P4SMA12AHM3_A/H pinout, P4SMA12AHM3_A/H application, or P4SMA12AHM3_A/H equivalent, this AEC-Q101 qualified, halogen-free, RoHS-compliant TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability embedded control and automotive subsystem designs.
Technical Context
The P4SMA12AHM3_A/H operates as a unidirectional avalanche-clamping device with a defined cathode band marking, utilizing a glass-passivated silicon junction for fast response (<1 ns) and stable breakdown behavior. Its thermal resistance (RθJA = 120 °C/W) and junction temperature limit (TJ = 150 °C) support operation under repetitive surge conditions when mounted on 5.0 mm × 5.0 mm copper pads.
It delivers 400 W peak pulse power per 10/1000 µs waveform up to 91 V, derating to 300 W above that threshold; its 0.078 %/°C temperature coefficient of VBR ensures predictable voltage drift across automotive temperature ranges. The device meets UL 497B recognition and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 10.2 V - maximum continuous reverse working voltage before clamping initiates |
| Breakdown Voltage (VBR) | 11.4–12.6 V at 1.0 mA - precise avalanche onset range defining protection threshold |
| Clamping Voltage (VC) | 16.7 V at 24.0 A IPPM - limits transient voltage seen by downstream circuitry during surge |
| Peak Pulse Power (PPPM) | 400 W (10/1000 µs) - energy-handling capacity for common lightning/inductive-spike waveforms |
| Peak Pulse Current (IPPM) | 24.0 A - maximum non-repetitive surge current the device safely clamps without failure |
| Reverse Leakage (ID) | 1.0 µA at VWM - negligible standby power loss and minimal signal-line loading |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive and wide-temperature industrial use |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected line connection point | Connected to the node requiring overvoltage protection; reverse-biased during normal operation |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates without compromising surge robustness |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation when properly laid out |
| Fast response time (<1 ns) | Clamps transients before sensitive logic or analog circuitry experiences overstress |
| Low incremental surge resistance | Minimizes voltage overshoot during high-di/dt events, improving protection margin |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver power rails from load-dump and alternator ripple transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between protected rail and chassis ground to clamp positive-going surges only. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces while maintaining signal integrity during ISO 7637-2 pulse 5a/b events. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input terminals to shunt induced spikes before reaching optocoupler input stage. Use Value: Enables >100,000 actuation cycles without degradation, meeting IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements. |
| Consumer Appliance Motor Drive Board | Telecom Power Supply Input Stage |
Use Scenario: Shielding MCU-based motor control logic from back-EMF spikes generated by brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: TVS placed at motor driver IC supply pins to suppress inductive kick during PWM commutation. Use Value: Eliminates false resets and firmware lockups caused by sub-100 ns transients exceeding 30 V on 5 V rails. |
Use Scenario: Front-end protection for AC/DC adapter inputs subjected to lightning-induced surges on telecom infrastructure power feeds. IC Role / Device Role / Timing Role: Primary-level unidirectional TVS used in coordination with MOVs and fuses to define coordinated clamping hierarchy. Use Value: Limits let-through voltage to <25 V during 6 kV/12 Ω combination wave tests, preserving downstream rectifier and controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/5A | Same VWM (10.2 V), identical SMA package, but lower PPPM (400 W vs. P4SMA12AHM3_A/H's 400 W); same AEC-Q101 not confirmed | Commercial-grade alternative without automotive qualification documentation | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive traceability |
| 1.5SMC12A | Higher package thermal mass (DO-214AB), 1500 W PPPM rating, larger footprint (7.11 mm × 6.22 mm vs. 4.50 mm × 3.99 mm) | Used where higher single-pulse energy absorption is needed, but board space and profile are less constrained | Choose for legacy designs with existing DO-214AB footprints or where 1.5 kW surge handling is mandated |
Compared with SMAJ12A-E3/5A and 1.5SMC12A, the P4SMA12AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and compact SMA (DO-214AC) packaging - enabling automotive-grade surge protection in space-constrained, thermally demanding PCB layouts without layout redesign.
Availability
P4SMA12AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input modules, consumer appliance motor controls, and telecom power supply front-ends requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for P4SMA12AHM3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The P4SMA Series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for robust, standardized transient suppression in space- and thermal-constrained surface-mount applications across harsh environments.
FAQ
What is the clamping voltage of the P4SMA12AHM3_A/H at its rated peak pulse current?
The P4SMA12AHM3_A/H has a maximum clamping voltage (VC) of 16.7 V at its specified peak pulse current (IPPM) of 24.0 A using the 10/1000 µs waveform. This value is measured under standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA12AHM3_A/H maintains this clamping performance consistently due to its glass-passivated junction and low incremental resistance.
Is the P4SMA12AHM3_A/H qualified for automotive applications?
Yes, the P4SMA12AHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in Vishay's ordering information and mechanical data tables. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and solderability per AEC-Q101 standards - making it suitable for under-hood and cabin electronics where reliability under thermal and vibration stress is mandatory. The P4SMA12AHM3_A/H also meets JESD201 Class 2 whisker resistance requirements.
What does the "_A/H" suffix mean in P4SMA12AHM3_A/H?
The "_A/H" suffix in P4SMA12AHM3_A/H denotes two key attributes: "A" indicates the device belongs to the AEC-Q101 qualified variant group covering P4SMA6.8A through P4SMA220A, and "H" specifies the packaging format - 7-inch diameter plastic tape and reel with 1800 units per reel. This ordering code ensures traceability to Vishay's qualified manufacturing lot and confirms halogen-free, RoHS-compliant material content per the HM3 base designation.
How does the P4SMA12AHM3_A/H compare to bidirectional TVS diodes like P4SMA12CA?
The P4SMA12AHM3_A/H is unidirectional and features a cathode band for polarity-sensitive placement, whereas P4SMA12CA is bidirectional with no polarity marking and symmetric clamping in both directions. The P4SMA12AHM3_A/H offers tighter VBR tolerance (11.4–12.6 V) and lower leakage (<1.0 µA) in reverse bias, making it optimal for DC rail protection. In contrast, P4SMA12CA is suited for AC signal lines or differential buses where polarity reversal occurs. The P4SMA12AHM3_A/H cannot substitute for P4SMA12CA in AC-coupled applications without circuit redesign.
What is the maximum operating junction temperature for the P4SMA12AHM3_A/H?
The P4SMA12AHM3_A/H has a maximum operating junction temperature (TJ) of +150 °C, as specified in the Absolute Maximum Ratings table. This rating enables reliable operation in high-ambient environments such as engine compartments or enclosed industrial enclosures. Derating curves in the datasheet show that peak pulse power must be reduced above TA = 25 °C, and thermal design must ensure RθJA ≤ 120 °C/W - achievable using minimum 5.0 mm × 5.0 mm copper pads per terminal. The P4SMA12AHM3_A/H maintains full specification compliance up to this junction limit.
P4SMA12AHM3_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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 24A
- 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)
P4SMA12AHM3_A/H FAQ
1.How can I place an order for P4SMA12AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA12AHM3_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 P4SMA12AHM3_A/H reliable?
The price and inventory of P4SMA12AHM3_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 P4SMA12AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA12AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA12AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA12AHM3_A/H?
P4SMA12AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA12AHM3_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 P4SMA12AHM3_A/H?
For technical support, including P4SMA12AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA12AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA12AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA12AHM3_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 P4SMA12AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA12AHM3_A/H?
All P4SMA12AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA12AHM3_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 P4SMA12AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA12AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA12AHM3_A/H 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 …
