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Taiwan Semiconductor Corporation P4SMA43CH
- Part No.:
- P4SMA43CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43CH.pdf
- Description:
- 400W, 43V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:3,430
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Product details
Overview
P4SMA43CH from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with 34.8V working stand-off voltage, 38.7–47.3V breakdown voltage at 1mA, and 61.9V maximum clamping voltage at 6.7A peak pulse current. It protects DC/DC converters and automotive power supplies against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA43CH datasheet, P4SMA43CH pinout, P4SMA43CH application, or P4SMA43CH equivalent, key selection criteria include clamping voltage under 10/1000μs surge, AEC-Q101 qualification for automotive use, moisture sensitivity level 1 compliance, and unidirectional polarity marking per DO-214AC mechanical layout.
Technical Context
The P4SMA43CH uses a glass-passivated silicon junction to achieve fast response time (<1.0ps) and low leakage (<1μA at 34.8V), enabling robust protection of sensitive 3.3V/5V/12V rail interfaces. Its 400W peak pulse power rating (10/1000μs) and 150°C maximum junction temperature support operation in high-temperature automotive engine compartments and industrial SMPS environments.
Designed as a unidirectional TVS, it conducts only during reverse overvoltage events, with cathode band marking for polarity identification. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, ensuring reliability in automated SMT assembly and long-term field deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 34.8 V - Maximum continuous reverse operating voltage before clamping begins; ensures no interference with normal 33V system rails |
| VBR min/max | 38.7 V / 47.3 V @ 1 mA - Verified breakdown range defines minimum overvoltage threshold for reliable triggering |
| VC@IPPM | 61.9 V @ 6.7 A - Clamping voltage limits downstream IC stress during 10/1000μs surge; critical for 48V system protection |
| PPPM | 400 W - Peak pulse power handling capacity per single 10/1000μs transient; supports repeated surge immunity per ISO 7637-2 |
| IR@VWM | <1 μA - Ultra-low reverse leakage preserves efficiency in battery-powered or low-quiescent-current systems |
| TJ max | 150 °C - Enables placement near heat-generating components like MOSFETs or inductors without thermal derating concerns |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); enables unidirectional clamping to GND |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 33V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives; improves surge lifetime |
| Fast response time <1.0 ps | Clamps transients before sensitive logic or analog circuitry experiences damaging overvoltage |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line capacitance discharge) |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without dry pack handling |
Applications
| Automotive Engine Control Unit (ECU) | Industrial DC/DC Converter |
|---|---|
Use Scenario: Protects 33V CAN-FD or LIN bus interface from load dump and alternator ripple in under-hood ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between signal line and chassis ground. Use Value: Limits transient voltage to ≤61.9V, preventing damage to 33V-rated transceivers while maintaining signal integrity during ISO 7637-2 Pulse 2b events. | Use Scenario: Shields feedback resistor network and PWM controller inputs in isolated 33V-to-5V flyback converters. IC Role / Device Role / Timing Role: Primary-side overvoltage clamp on auxiliary winding or output rectifier cathode node. Use Value: Absorbs 400W surge energy without degradation, preserving regulation accuracy and preventing false OVP shutdown during line surges. |
| LED Driver Power Supply | Telecom PoE Midspan Injector |
Use Scenario: Safeguards constant-current LED driver ICs from inductive kickback when driving high-power 33V LED strings. IC Role / Device Role / Timing Role: Reverse-biased TVS across output terminals to clamp flyback spikes during MOSFET turn-off. Use Value: Clamps to 61.9V within <1ps, limiting peak stress on driver FETs and avoiding latch-up in integrated controllers. | Use Scenario: Protects 33V PoE midspan data-line interface from Ethernet cable ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Line-to-ground TVS on secondary-side 33V bias rail feeding PHY and magnetics bias windings. Use Value: Withstands ±15kV contact ESD (IEC 61000-4-2) and 10/1000μs surges up to 6.7A without parameter shift or failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | DO-214AA (SMB) package; 33V VWM, 64.3V VC @ 6.2A; same 400W rating but higher clamping voltage | Requires larger PCB footprint; less suitable for ultra-dense layouts where SMA's smaller size matters | Select when board space allows larger SMB package and slightly higher clamping tolerance is acceptable |
| 1.5SMC33A | DO-214AB (SMC) package; 33V VWM, 53.3V VC @ 7.5A; 1500W rating, not AEC-Q101 qualified | Higher power handling but lacks automotive qualification and has different thermal profile due to larger case | Prefer for non-automotive industrial applications requiring higher surge margin and lower clamping voltage |
Compared with P4SMA43CH, SMBJ33A offers identical power rating but larger footprint and higher clamping voltage, while 1.5SMC33A delivers superior clamping and surge capacity but lacks AEC-Q101 validation and requires more PCB area-making P4SMA43CH optimal for space-constrained, automotive-qualified 33V rail protection.
Availability
P4SMA43CH is available at Aetrix Electronics and suitable for automotive engine control units, industrial DC/DC converters, and LED driver power supplies requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA43CH 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, and rectifiers with global distribution and AEC-Q101 certification capability.
The P4SMA43CH belongs to TSC's P4SMAxH series of surface-mount TVS diodes, engineered specifically for automotive and industrial transient suppression where compact size, AEC-Q101 compliance, and precise clamping performance are mandatory.
FAQ
What is the polarity configuration of the P4SMA43CH?
The P4SMA43CH is a unidirectional TVS diode with cathode band marking on the DO-214AC (SMA) package body. This polarity enables clamping only during reverse overvoltage events-ideal for protecting positive-rail systems referenced to ground. Its unidirectional behavior distinguishes it from bidirectional variants like P4SMA43CH's CH-suffix counterparts, which lack polarity marking and conduct in both directions.
Does the P4SMA43CH meet AEC-Q101 requirements for automotive use?
Yes, the P4SMA43CH is explicitly AEC-Q101 qualified per the manufacturer's documentation. It undergoes stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD verification to ensure reliability in automotive under-hood environments. This qualification covers its full operating temperature range of –55°C to +150°C and validates its suitability for engine control modules and body electronics.
What is the maximum clamping voltage of the P4SMA43CH under standard surge conditions?
The P4SMA43CH has a maximum clamping voltage (VC) of 61.9 V at 6.7 A peak pulse current using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by downstream circuitry during a standardized surge event-critical for ensuring compatibility with 33V-rated ICs and preventing overvoltage damage.
How does the P4SMA43CH compare to the P4SMA43AH variant?
The P4SMA43CH differs from P4SMA43AH in breakdown voltage range: P4SMA43CH specifies 38.7–47.3 V, while P4SMA43AH tightens this to 40.9–45.2 V. Both share identical VWM (34.8 V), VC (61.9 V), and packaging. The "H" suffix denotes standard tolerance; "AH" indicates tighter VBR binning-use P4SMA43AH where precise threshold matching is required, otherwise P4SMA43CH provides broader design margin.
Is the P4SMA43CH RoHS and halogen-free compliant?
Yes, the P4SMA43CH is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and matte tin-plated leads satisfy J-STD-002 solderability standards. These certifications confirm environmental compliance for global electronics manufacturing and support end-of-life recycling requirements without compromising electrical or thermal performance.
P4SMA43CH 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):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
P4SMA43CH FAQ
1.How can I place an order for P4SMA43CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43CH 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 P4SMA43CH reliable?
The price and inventory of P4SMA43CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43CH is usually 5 days.
3.What payment methods are accepted for P4SMA43CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43CH?
P4SMA43CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43CH 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 P4SMA43CH?
For technical support, including P4SMA43CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43CH requirements.
6.How does Aetrix verify that P4SMA43CH is sourced from the original manufacturer or authorized distributors?
All P4SMA43CH 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 P4SMA43CH meets industry standards.
7.What is the process for return or replacement of P4SMA43CH?
All P4SMA43CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43CH, 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 P4SMA43CH part is unused and in its original packaging.
Return procedure for P4SMA43CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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