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Taiwan Semiconductor Corporation P4SMA56CH
- Part No.:
- P4SMA56CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56CH.pdf
- Description:
- 400W, 56V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:8,344
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Product details
Overview
P4SMA56CH from Taiwan Semiconductor is a unidirectional 400W surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, with breakdown voltage 50.4–61.6V at 1mA, working stand-off voltage 45.4V, clamping voltage 80.5V at 5.2A (10/1000μs), and AEC-Q101 qualification for automotive-grade surge protection in DC/DC converters.
For engineers reviewing the P4SMA56CH datasheet, P4SMA56CH pinout, P4SMA56CH application, or P4SMA56CH equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, peak pulse current capability under ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms, junction temperature derating above 25°C, and unidirectional polarity marking alignment on PCB layout.
Technical Context
The P4SMA56CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (50.4–61.6V), clamping transients to ≤80.5V at 5.2A. Its glass-passivated junction ensures stable breakdown and low leakage (<1μA at 45.4V).
Designed for single-pulse transient suppression per IEC 61000-4-5 and ISO 7637-2, it delivers 400W peak pulse power (10/1000μs), with fast response <1.0ps and operating junction temperature from –55°C to +150°C - enabling use in harsh automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 50.4–61.6V - defines minimum voltage at which avalanche conduction begins; sets lower bound of protection threshold |
| VWM | 45.4V - maximum continuous reverse operating voltage; must exceed system nominal DC rail to avoid leakage during normal operation |
| VC @ IPPM=5.2A | 80.5V - clamped voltage during 10/1000μs surge; determines maximum stress imposed on downstream circuitry |
| PPPM | 400W - peak pulse power handling; defines transient energy absorption capacity without failure |
| IR @ VWM | <1μA - reverse leakage at stand-off voltage; ensures negligible standby current drain in battery-powered systems |
| TJ max | +150°C - maximum junction temperature; supports operation in engine bay or high-ambient industrial enclosures |
| Package | DO-214AC (SMA) - industry-standard SMD outline with cathode band marking; compatible with automated pick-and-place |
Pinout & Package
DO-214AC (SMA) surface-mount package with two terminals: anode and cathode. Cathode identified by molded band on body. Matte tin-plated leads meet J-STD-002 solderability requirements. Weight ≈0.060g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional TVS configuration | Completes conduction path during transient clamp; must be routed with low-inductance trace to minimize overshoot |
| Cathode | Current exit terminal in forward bias; marked by band; connected to protected line (e.g., 48V rail) | Defines polarity-sensitive placement; reversal causes open-circuit failure during surge events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD - enables use in ADAS, body control, and infotainment modules |
| Glass passivated junction | Stable VBR tolerance and low parameter drift over lifetime; resists moisture ingress and contamination in humid environments |
| Clamping voltage ≤80.5V | Provides ≥15% margin below typical 95V automotive load-dump immunity requirement - protects 75V-rated MOSFETs and controllers |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) - covers full vehicle electrical disturbance profile |
| Moisture sensitivity level 1 | No floor life limitation or baking required before reflow; simplifies manufacturing and reduces assembly risk |
Applications
| On-board DC/DC Converter | Automotive Lighting Module |
|---|---|
Use Scenario: Protects 12V-to-5V buck converter input stage from load dump and alternator ripple in headlamp ECU. IC Role / Device Role / Timing Role: Unidirectional TVS placed upstream of input capacitor to clamp surges before they reach controller IC and power MOSFETs. Use Value: Clamps 400W transients to 80.5V, preventing gate oxide rupture in 100V-input buck controllers and maintaining regulation during ISO 7637-2 Pulse 2b events. | Use Scenario: Shields LED driver IC and current-sense resistors in adaptive front-lighting systems (AFS) from ignition-induced spikes. IC Role / Device Role / Timing Role: Standoff-connected TVS across input rail to absorb repetitive switching transients from PWM-driven ballasts. Use Value: Sub-1μA leakage at 45.4V avoids false triggering of overvoltage protection, while 80.5V clamping preserves 60V-rated LED string drivers. |
| Industrial SMPS Input Stage | 12V/24V Rail Protection in Telematics Unit |
Use Scenario: Safeguards AC/DC adapter primary-side rectifier and bulk capacitor from lightning-induced surges in factory automation power supplies. IC Role / Device Role / Timing Role: First-line transient suppressor between bridge rectifier output and bulk capacitor, absorbing energy before it reaches PWM controller. Use Value: 400W rating handles 10/1000μs surges up to 5.2A without degradation; DO-214AC footprint allows dense layout near entry connector. | Use Scenario: Secures CAN/LIN interface power rail in vehicle telematics gateway against battery disconnection pulses (ISO 7637-2 Pulse 2a). IC Role / Device Role / Timing Role: Localized TVS on 12V VCC net feeding CAN transceiver and microcontroller LDO. Use Value: 80.5V clamping ensures CAN PHY remains functional during 100V/50ms transients; AEC-Q101 qualification guarantees reliability across thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | Bidirectional; VBR min/max = 64.4–71.2V; VC = 93.6V @ 4.3A; same DO-214AA (SMB) package | Supports AC-coupled lines or bidirectional data bus protection; higher clamping voltage reduces margin for 75V-rated devices | Select SMBJ58A only if bidirectional surge immunity is required; not drop-in due to polarity and clamping mismatch |
| 1.5SMC56A | Same unidirectional function; VBR = 50.4–61.6V; VC = 80.5V @ 5.2A; but DO-214AB (SMC) package - 2.5× larger footprint | Higher thermal mass suits high-repetition-rate surges; incompatible with SMA-reflow profiles and board space constraints | Choose 1.5SMC56A only when enhanced thermal dissipation is needed and PCB area permits larger SMC outline |
Compared with SMBJ58A and 1.5SMC56A, the P4SMA56CH offers optimal balance of compact DO-214AC footprint, AEC-Q101 qualification, and precise 45.4V stand-off voltage - making it preferred for space-constrained, automotive-compliant 12V/24V rail protection where unidirectional clamping suffices.
Availability
P4SMA56CH is available at Aetrix Electronics and suitable for automotive lighting modules, on-board DC/DC converters, and industrial SMPS input stages requiring stable component supply with AEC-Q101 assurance and ISO 7637-2 compliance.
Supply support for P4SMA56CH 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, with global distribution and AEC-Q101 validation capabilities.
The P4SMA56CH belongs to TSC's P4SMAxH series of 400W surface-mount TVS diodes designed specifically for automotive and industrial transient suppression - emphasizing robustness, tight parametric control, and compatibility with high-volume SMT assembly.
FAQ
What is the polarity configuration of the P4SMA56CH?
The P4SMA56CH is a unidirectional TVS diode, with cathode identified by a molded band on the DO-214AC package body. It conducts only when reverse-biased beyond its breakdown voltage, making it suitable for DC rail protection where polarity is fixed. Unlike bidirectional variants (e.g., P4SMA56CH's counterpart P4SMA56CAH), the P4SMA56CH does not conduct in forward direction during surge events - ensuring no unintended current path in properly oriented layouts.
Does the P4SMA56CH meet automotive qualification standards?
Yes, the P4SMA56CH is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock per automotive reliability requirements. This qualification confirms suitability for under-hood and cabin applications such as body control modules and lighting ECUs - distinct from commercial-grade TVS diodes that lack this validation. The P4SMA56CH datasheet explicitly states AEC-Q101 compliance in its FEATURES section.
What is the maximum clamping voltage of the P4SMA56CH under standard test conditions?
The maximum clamping voltage of the P4SMA56CH is 80.5V at a peak pulse current of 5.2A, measured using the 10/1000μs waveform per IEC 61000-4-5. This value represents the upper limit of voltage imposed on protected circuitry during worst-case surge events and is critical for verifying margin against downstream component absolute maximum ratings - for example, ensuring it stays below the 100V drain-source rating of common automotive MOSFETs used in power stages.
Can the P4SMA56CH be used in bidirectional signal line protection?
No, the P4SMA56CH is strictly unidirectional and unsuitable for bidirectional signal lines such as RS-485, CAN, or USB data pairs. Its asymmetrical conduction behavior means it will not clamp positive transients on a floating or AC-coupled line. For such applications, a bidirectional variant like P4SMA56CAH - which exhibits identical clamping performance in both polarities - must be selected instead. Using P4SMA56CH in bidirectional roles risks unprotected overstress during half-cycle surges.
How does the P4SMA56CH's 400W peak pulse power rating translate to real-world surge handling?
The 400W rating for the P4SMA56CH corresponds to its ability to absorb a single 10/1000μs transient event delivering up to 5.2A at 80.5V without failure. In practice, this supports compliance with ISO 7637-2 Pulse 1 (–150V/0.5Ω) and Pulse 2b (+100V/2Ω) on 12V systems, provided PCB layout minimizes trace inductance. Derating applies above 25°C ambient - e.g., at 85°C, usable peak power drops to ~260W per the pulse derating curve in the P4SMA56CH datasheet.
P4SMA56CH 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):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
P4SMA56CH FAQ
1.How can I place an order for P4SMA56CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56CH 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 P4SMA56CH reliable?
The price and inventory of P4SMA56CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA56CH is usually 5 days.
3.What payment methods are accepted for P4SMA56CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56CH?
P4SMA56CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56CH 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 P4SMA56CH?
For technical support, including P4SMA56CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56CH requirements.
6.How does Aetrix verify that P4SMA56CH is sourced from the original manufacturer or authorized distributors?
All P4SMA56CH 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 P4SMA56CH meets industry standards.
7.What is the process for return or replacement of P4SMA56CH?
All P4SMA56CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56CH, 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 P4SMA56CH part is unused and in its original packaging.
Return procedure for P4SMA56CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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