My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA16CAHM3/I
- Part No.:
- P4SMA16CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA16CAHM3/I.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,814
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA16CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P4SMA series, designed for clamping voltage transients on signal and power lines. It features a 16 V standoff voltage (VWM), 17.8 A peak pulse current (IPPM) at 10/1000 μs, 22.5 V maximum clamping voltage (VC), and 400 W peak pulse power rating. It is used to protect sensitive ICs and MOSFETs in automotive sensor interfaces and industrial control I/O lines.
For engineers reviewing the P4SMA16CAHM3/I datasheet, P4SMA16CAHM3/I pinout, P4SMA16CAHM3/I application, or P4SMA16CAHM3/I equivalent, key selection considerations include bidirectional clamping capability, AEC-Q101 qualification for automotive use, SMA (DO-214AC) package compatibility with automated placement, and thermal derating above 25 °C ambient.
Technical Context
The P4SMA16CAHM3/I operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and inductive switching spikes.
Rated for 400 W peak pulse power (10/1000 μs waveform) and 3.3 W steady-state power dissipation, it is thermally characterized with RθJA = 120 °C/W and RθJL = 30 °C/W, and supports operation from −65 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 13.6 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 15.2–16.8 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 22.5 V at IPPM = 17.8 A - Peak voltage seen by protected circuit under 400 W transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Surge energy handling capacity; validated per REA-defined waveform with 0.01% duty cycle. |
| ID (Reverse Leakage) | 1.0 μA at VWM - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | +150 °C - Enables reliable operation in under-hood automotive and industrial environments with elevated ambient temperatures. |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Molding compound meets UL 94 V-0. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative transients relative to cathode reference. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical junction; conducts during positive transients; no band marking on bidirectional devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 400 W peak pulse power (10/1000 μs) | Supports robust immunity against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) in industrial and automotive interfaces. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
| Low profile SMA package | 0.208" × 0.157" footprint with 0.078" height enables dense PCB layouts and compatibility with standard SMT reflow profiles. |
| MSL Level 1 (260 °C peak) | Eliminates moisture sensitivity concerns; allows unlimited floor life and single-reflow assembly without baking. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient voltage to ≤22.5 V during 400 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor signal conditioning circuits. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced transients and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input line, referenced to common ground, absorbing repetitive switching spikes. Use Value: Maintains system uptime by preventing false triggering or input-stage failure under 10/1000 μs surges up to 17.8 A peak current. |
| Telecom Line Card Surge Protection | Consumer Device USB/DisplayPort ESD Guarding |
Use Scenario: Secondary protection on telecom line cards handling T1/E1 or xDSL signals exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Downstream clamping device following gas discharge tube (GDT) primary protection; handles residual energy. Use Value: Clamps residual transients to 22.5 V within nanoseconds, safeguarding low-voltage PHY ICs while supporting >100 kV/μs slew rate immunity. |
Use Scenario: Board-level ESD suppression on USB 2.0 data lines and DisplayPort AUX channels in laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector pins to shunt ±8 kV contact ESD per IEC 61000-4-2. Use Value: Delivers sub-1 ns response with <1 μA leakage, preserving signal integrity without degrading 480 Mbps USB bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16CA | Same VWM (13.6 V) and VC (22.5 V), but SMB package (DO-214AA); 600 W PPPM rating. | Larger footprint (0.236" × 0.157"); higher thermal mass; better suited for higher-energy surges where board space permits. | Select SMBJ16CA when higher pulse power margin or improved thermal performance is required and PCB layout allows larger package. |
| 1.5SMC16CA | Same electrical specs, but SMC (DO-214AB) package; 1500 W PPPM; higher IFSM (200 A). | Substantially larger (0.276" × 0.197"); not suitable for space-constrained automotive modules or high-density consumer PCBs. | Choose 1.5SMC16CA only for legacy industrial systems where SMC footprint is standardized and surge energy exceeds 400 W. |
Compared with SMBJ16CA and 1.5SMC16CA, the P4SMA16CAHM3/I offers optimal balance of AEC-Q101 compliance, compact SMA footprint, and verified 400 W surge handling-making it preferred for new automotive and space-limited industrial designs requiring production-grade reliability.
Availability
P4SMA16CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line protection circuits, and consumer USB interface designs requiring stable component supply and long-term lifecycle support.
Supply support for P4SMA16CAHM3/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 automotive-grade qualification.
The P4SMA series is engineered for high-reliability transient suppression in automotive, industrial, and telecom applications-delivering consistent clamping performance, AEC-Q101 validation, and optimized surface-mount packaging for automated manufacturing.
FAQ
What is the clamping voltage of the P4SMA16CAHM3/I under full-rated surge conditions?
The P4SMA16CAHM3/I has a maximum clamping voltage (VC) of 22.5 V when subjected to its rated 17.8 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is measured at TJ = 25 °C and represents the upper limit of voltage imposed on the protected circuit during worst-case transient events. The P4SMA16CAHM3/I maintains this clamping performance across its qualified operating temperature range.
Is the P4SMA16CAHM3/I suitable for automotive applications?
Yes, the P4SMA16CAHM3/I is AEC-Q101 qualified (denoted by the HM3 suffix), making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. It undergoes rigorous stress testing for temperature cycling, high-temperature reverse bias, and ESD immunity. The P4SMA16CAHM3/I is specifically designed for under-hood and cabin environments with operating junction temperatures up to +150 °C.
What does the "CA" suffix indicate in P4SMA16CAHM3/I?
"CA" denotes that the P4SMA16CAHM3/I is a bidirectional Transient Voltage Suppressor, meaning it provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., P4SMA16A), the CA version has no polarity marking and functions identically in either direction-ideal for protecting AC-coupled lines, differential buses, or floating references where polarity cannot be assumed.
What is the thermal resistance of the P4SMA16CAHM3/I, and how does it affect layout?
The P4SMA16CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W. To maintain reliability under sustained power dissipation, PCB layout must follow Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal. Exceeding 3.3 W steady-state power or operating above 25 °C ambient requires derating per Figure 2 in the datasheet. The P4SMA16CAHM3/I's thermal behavior directly impacts surge repetition rate and long-term stability.
How does the P4SMA16CAHM3/I compare to unidirectional P4SMA16A variants in circuit design?
The P4SMA16CAHM3/I differs from unidirectional P4SMA16A in polarity handling: it clamps equally in both directions and lacks a cathode band, simplifying layout for AC or floating nodes. Unidirectional versions require correct orientation and provide forward conduction path-useful for DC-biased rails. The P4SMA16CAHM3/I's bidirectional symmetry eliminates orientation errors and supports protection of differential pairs, but offers no forward rectification function. Both share identical VWM, VBR, VC, and PPPM ratings.
P4SMA16CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 13.6V
- Voltage - Breakdown (Min):
- 15.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.5V
- Current - Peak Pulse (10/1000µs):
- 17.8A
- 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)
P4SMA16CAHM3/I FAQ
1.How can I place an order for P4SMA16CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA16CAHM3/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 P4SMA16CAHM3/I reliable?
The price and inventory of P4SMA16CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA16CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA16CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA16CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA16CAHM3/I?
P4SMA16CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA16CAHM3/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 P4SMA16CAHM3/I?
For technical support, including P4SMA16CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA16CAHM3/I requirements.
6.How does Aetrix verify that P4SMA16CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA16CAHM3/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 P4SMA16CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA16CAHM3/I?
All P4SMA16CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA16CAHM3/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 P4SMA16CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA16CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA16CAHM3/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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
