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Taiwan Semiconductor Corporation P4SMA51CAH
- Part No.:
- P4SMA51CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51CAH.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,885
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Product details
Overview
P4SMA51CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 51V breakdown voltage (min 48.5V, max 53.6V), 43.6V working stand-off voltage, and clamps to ≤70.1V at 6.0A peak impulse current under 10/1000μs waveform. It is AEC-Q101 qualified and used for surge protection in automotive DC/DC converters.
For engineers reviewing the P4SMA51CAH datasheet, P4SMA51CAH pinout, P4SMA51CAH application, or P4SMA51CAH equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1μA reverse leakage at VWM, 150°C junction rating, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
The P4SMA51CAH implements a glass-passivated silicon junction optimized for fast transient suppression, with typical response time under 1.0ps and clamping performance validated per ANSI/IEEE C62.35. Its bidirectional configuration enables symmetrical protection of AC-coupled or floating signal/power lines without polarity constraints.
Designed for automotive-grade reliability, it meets JESD201 Class 2 whisker resistance, J-STD-020 Moisture Sensitivity Level 1, and RoHS/halogen-free requirements per IEC 61249-2-21. Thermal derating follows Fig.2, maintaining 400W capability only at TA ≤25°C and linearly decreasing to zero at TJ = 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 48.5V min / 53.6V max - defines minimum and maximum voltage at which device enters avalanche conduction |
| VWM | 43.6V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM=6.0A | ≤70.1V - clamped voltage during 10/1000μs surge, limiting downstream circuit stress |
| PPPM | 400W - peak pulse power handling under standardized 10/1000μs waveform |
| IR @ VWM | ≤1μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150°C - enables operation in under-hood automotive environments and high-power density PCBs |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with 0.060g mass and J-STD-002 solderability |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional variants; P4SMA51CAH is bidirectional and marked with "CGJ" code - no polarity marking required. Weight: 0.060g. UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity - no fixed polarity assignment |
| Case | Non-electrical mechanical interface | Plastic body provides thermal path and mechanical mounting; not electrically connected |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use including temperature cycling, humidity bias, and mechanical shock testing |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity exposure |
| ISO 7637-2 compliance | Withstands defined automotive transients: Pulse 1 (inductive load dump), Pulse 2a/2b (switching spikes), Pulse 3a/3b (ignition noise) |
| Fast response time | <1.0ps - limits voltage overshoot before clamping engages, protecting sensitive IC inputs |
| Moisture sensitivity level 1 | No floor-life limitation or baking requirement prior to reflow - supports standard SMT assembly flow |
Applications
| Automotive On-Board DC/DC Converter | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protection of 12V/24V input rails in automotive buck/boost converters exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±100V+ surges within 1ps while maintaining <1μA leakage at 43.6V nominal. Use Value: Enables compliance with ISO 7637-2 Pulse 1 (−150V/0.5Ω) and Pulse 2b (+100V/2Ω) without derating or parallel devices. | Use Scenario: Input surge suppression in industrial switch-mode power supplies subjected to lightning-induced line surges and switching noise. IC Role / Device Role / Timing Role: Primary-level transient shunt on AC-DC or DC-DC front-end, triggered within sub-picosecond to limit voltage excursion below 70.1V at 6A. Use Value: Replaces bulkier DO-15 or SMB packages while delivering identical 400W peak power in 50% smaller footprint (DO-214AC vs DO-15). |
| LED Driver Power Input | Automotive Body Control Module (BCM) I/O Lines |
Use Scenario: Protecting constant-current LED drivers against inductive kickback from relay coils and ESD events during service. IC Role / Device Role / Timing Role: Bidirectional clamping element across driver input, absorbing repetitive 10/1000μs pulses up to 400W without degradation. Use Value: Maintains <1μA leakage at 43.6V to avoid false triggering in low-current sense circuits and preserves driver efficiency. | Use Scenario: Signal-line protection on LIN/CAN-supplied sensors and actuators in BCMs where space and reliability are critical. IC Role / Device Role / Timing Role: Low-capacitance (<100pF), bidirectional TVS on 5–12V sensor supply or communication lines, responding faster than microcontroller ESD structures. Use Value: Provides system-level immunity to ESD (IEC 61000-4-2) and burst noise (IEC 61000-4-4) without adding series impedance or signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | DO-214AA (SMB) package; same 48.5–53.6V VBR range but 600W PPPM rating | Higher power handling suits higher-energy transients; larger footprint may conflict with dense layouts | Select SMBJ51CA when surge energy exceeds 400W but board space allows SMB outline |
| 1.5KE51CA | DO-201AD (axial leaded) package; 48.5–53.6V VBR, 1500W PPPM, through-hole mounting | Not SMT-compatible; intended for prototyping, high-reliability legacy systems, or manual repair | Choose 1.5KE51CA only for through-hole designs or where axial form factor is mandated by mechanical constraints |
Compared with SMBJ51CA and 1.5KE51CA, the P4SMA51CAH delivers optimal balance of AEC-Q101 qualification, DO-214AC SMT compatibility, and 400W surge capacity - making it the preferred choice for space-constrained automotive and industrial surface-mount power rail protection.
Availability
P4SMA51CAH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, industrial switch-mode power supplies, and LED driver input protection requiring stable component supply across production lifecycles.
Supply support for P4SMA51CAH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer applications.
The P4SMA51CAH belongs to TSC's AEC-Q101-qualified P4SMAx(A)H series - engineered specifically for robust, surface-mount transient suppression in harsh automotive electrical environments.
FAQ
What does the "CAH" suffix indicate in P4SMA51CAH?
The "CAH" suffix denotes a bidirectional configuration with tightened breakdown voltage tolerance (±5% around nominal 51V), AEC-Q101 qualification, and halogen-free construction. Unlike unidirectional "CH" variants, P4SMA51CAH provides symmetrical clamping for AC signals or floating rails - confirmed in the datasheet's "Devices for Bipolar Applications" section and electrical table entry for P4SMA51AH.
Is P4SMA51CAH compatible with lead-free reflow processes?
Yes, P4SMA51CAH is fully compatible with lead-free reflow soldering per J-STD-002. Its matte tin-plated leads meet solderability requirements, and its DO-214AC package is rated for MSL Level 1 - meaning no moisture sensitivity concerns or pre-bake steps are needed before reflow, supporting standard high-volume SMT assembly.
How does P4SMA51CAH perform under repeated surge stress?
P4SMA51CAH is rated for non-repetitive surges per Fig.5 (10/1000μs waveform). While not specified for repetitive duty, its glass-passivated junction and 150°C TJ max enable reliable operation in applications with infrequent transients such as automotive load dumps. For repetitive surge environments, derating per Fig.2 and verification via application-specific testing is recommended.
Does P4SMA51CAH meet ISO 7637-2 Pulse 1 requirements?
Yes, P4SMA51CAH is explicitly stated to meet ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ignition noise). Its 400W peak pulse power and ≤70.1V clamping voltage at 6.0A ensure compliance when applied with appropriate series impedance per test standard definitions.
What is the marking code for P4SMA51CAH on the device body?
The marking code for P4SMA51CAH is "CGJ", as listed in the Electrical Specifications table. This 3-character laser mark appears on the DO-214AC package body and corresponds uniquely to the 48.5–53.6V breakdown range, 1mA test current, and CAH variant - enabling visual identification and traceability in production and field repair.
P4SMA51CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 6A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA51CAH FAQ
1.How can I place an order for P4SMA51CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51CAH 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 P4SMA51CAH reliable?
The price and inventory of P4SMA51CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51CAH is usually 5 days.
3.What payment methods are accepted for P4SMA51CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51CAH?
P4SMA51CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51CAH 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 P4SMA51CAH?
For technical support, including P4SMA51CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51CAH requirements.
6.How does Aetrix verify that P4SMA51CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA51CAH 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 P4SMA51CAH meets industry standards.
7.What is the process for return or replacement of P4SMA51CAH?
All P4SMA51CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51CAH, 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 P4SMA51CAH part is unused and in its original packaging.
Return procedure for P4SMA51CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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