My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA15CAHM3_A/I
- Part No.:
- P4SMA15CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA15CAHM3_A/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,884
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA15CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 15 V standoff voltage (VWM), 17.1 V minimum breakdown voltage (VBR), 21.2 V maximum clamping voltage (VC) at 18.9 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 P4SMA15CAHM3_A/I datasheet, P4SMA15CAHM3_A/I pinout, P4SMA15CAHM3_A/I application, or P4SMA15CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.24), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical avalanche behavior in both polarities, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C peak.
The P4SMA15CAHM3_A/I delivers 400 W peak pulse power under standardized 10/1000 µs waveform conditions when mounted on 5.0 mm × 5.0 mm copper pads, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), allowing reliable operation up to 150 °C junction temperature in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for protected circuit. |
| VBR (Breakdown Voltage) | 17.1–18.9 V at 1 mA - Minimum voltage at which avalanche conduction initiates reliably; ensures predictable clamping onset. |
| VC (Clamping Voltage) | 21.2 V at 18.9 A - Maximum voltage seen by protected circuit during 10/1000 µs transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Surge energy handling capacity under standard 10/1000 µs waveform; enables robust protection against ESD and load-switching spikes. |
| IPPM (Peak Pulse Current) | 18.9 A - Maximum transient current the device can shunt while maintaining VC ≤ 21.2 V; critical for sizing protection on 12 V/24 V rails. |
| TJmax | 150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking; case meets UL 94 V-0 flammability rating and features matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during positive transient | One side of symmetrical PN junction; conducts during positive half-cycle of bidirectional surge. |
| Cathode | Current entry terminal during negative transient | Other side of symmetrical PN junction; conducts during negative half-cycle - functionally identical to Anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses, and ungrounded lines without polarity concerns. |
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients common in automotive load-dump and industrial relay switching events. |
| AEC-Q101 qualified & halogen-free | Meets automotive reliability requirements and environmental compliance (RoHS + JEDEC J-STD-20 Class 2 whisker resistance). |
| Low clamping ratio (VC/VBR = ~1.24) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT processes without pre-baking or special handling. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load-dump and inductive kickback in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across LIN signal pair and ground to limit transients to <21.2 V during 12 V system faults. Use Value: Prevents latch-up or damage to 5 V tolerant transceivers while maintaining signal integrity due to low capacitance (~100 pF at 0 V). |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary transient suppressor on each opto-isolator input path, clamping fast-rising spikes before they reach internal LED drivers. Use Value: Enables >100,000 surge cycles without degradation, validated per AEC-Q101, reducing field failure rates in factory automation. |
| Consumer Appliance Motor Drive Interface | Telecom Base Station Sensor Monitoring |
|
Use Scenario: Shielding MCU analog inputs monitoring brushless motor phase currents from commutation noise and back-EMF spikes. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA at 15 V) bidirectional TVS placed between ADC input and ground to prevent saturation during PWM edge transitions. Use Value: Maintains measurement accuracy by limiting transient-induced offset errors while adding <0.5 ns propagation delay. |
Use Scenario: Protecting RS-485 transceiver data lines and temperature/humidity sensor analog outputs in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Secondary-level protection stage after gas discharge tube (GDT), clamping residual surges to <21.2 V before reaching isolated interface ICs. Use Value: Achieves IEC 61000-4-5 Level 3 (1 kV/2 kV) immunity without compromising signal bandwidth due to DO-214AC's low parasitic inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Same VWM/VC, but SMB package (DO-214AA); 600 W PPPM, higher IPPM (38.9 A), larger footprint. | Better suited for higher-energy transients where board space allows larger package; not drop-in compatible with SMA land pattern. | Select SMBJ15CA only if surge energy exceeds 400 W and layout permits 2.54 mm pitch increase. |
| 1.5KE15CA | Through-hole TO-218 package; same electrical specs but higher thermal mass; 500 W PPPM, 38.9 A IPPM. | Used in legacy designs or high-reliability power supplies where manual assembly or wave soldering is required. | Choose 1.5KE15CA for through-hole production or when higher surge repetition tolerance is needed beyond surface-mount limits. |
Compared with SMBJ15CA and 1.5KE15CA, the P4SMA15CAHM3_A/I offers optimal balance of AEC-Q101 qualification, halogen-free compliance, and compact SMA footprint for modern automotive and industrial SMT designs - trading peak power for board-area efficiency and process compatibility.
Availability
P4SMA15CAHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and consumer appliance motor control requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA15CAHM3_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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series was developed for high-volume, high-reliability transient suppression in automotive, industrial, and telecom applications - combining AEC-Q101 qualification, halogen-free materials, and optimized SMT packaging for automated manufacturing.
FAQ
What does the "CA" suffix mean in P4SMA15CAHM3_A/I?
The "CA" suffix in P4SMA15CAHM3_A/I indicates a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., P4SMA15A), this device provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals, differential buses, or circuits without defined ground reference. The P4SMA15CAHM3_A/I has no polarity marking and functions identically regardless of voltage polarity applied across its terminals.
Is P4SMA15CAHM3_A/I qualified for automotive use?
Yes, P4SMA15CAHM3_A/I is AEC-Q101 qualified - verified for automotive-grade reliability including temperature cycling, highly accelerated life testing (HALT), and electrostatic discharge (ESD) per JESD22-A114. The "HM3" suffix denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-20 Class 2 whisker resistance, making P4SMA15CAHM3_A/I suitable for under-hood and chassis-mounted applications.
What is the clamping voltage of P4SMA15CAHM3_A/I at rated surge current?
The P4SMA15CAHM3_A/I has a maximum clamping voltage (VC) of 21.2 V at 18.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per JEDEC test conditions. The low VC/VBR ratio (~1.24) ensures minimal overvoltage stress on protected 15 V-rated components during transient events.
Can P4SMA15CAHM3_A/I replace P4SMA15A in a design?
No - P4SMA15CAHM3_A/I is bidirectional, while P4SMA15A is unidirectional and features a cathode band marking. Substituting them requires verifying circuit topology: P4SMA15CAHM3_A/I may be used in place of P4SMA15A only if the protected line lacks DC bias or uses symmetric signaling. Using P4SMA15CAHM3_A/I in a unidirectional DC path introduces unnecessary conduction during reverse bias, potentially causing leakage or malfunction.
What is the thermal resistance of P4SMA15CAHM3_A/I?
The P4SMA15CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured under standard JEDEC conditions (25 °C ambient, 0.2" × 0.2" copper pads). These values define derating curves for sustained power dissipation and ensure safe operation up to 150 °C junction temperature when used within specified surge duty cycle limits.
P4SMA15CAHM3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 18.9A
- 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)
P4SMA15CAHM3_A/I FAQ
1.How can I place an order for P4SMA15CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA15CAHM3_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 P4SMA15CAHM3_A/I reliable?
The price and inventory of P4SMA15CAHM3_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 P4SMA15CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA15CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA15CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA15CAHM3_A/I?
P4SMA15CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA15CAHM3_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 P4SMA15CAHM3_A/I?
For technical support, including P4SMA15CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA15CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA15CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA15CAHM3_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 P4SMA15CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA15CAHM3_A/I?
All P4SMA15CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA15CAHM3_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 P4SMA15CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA15CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA15CAHM3_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 …
