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Taiwan Semiconductor Corporation P4SMA43CAH
- Part No.:
- P4SMA43CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43CAH.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,846
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Product details
Overview
P4SMA43CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 40.9–45.2V breakdown voltage (VBR), and 36.8V working stand-off voltage (VWM), designed to protect automotive and industrial DC/DC converter circuits against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA43CAH datasheet, P4SMA43CAH pinout, P4SMA43CAH application, or P4SMA43CAH equivalent, key selection criteria include bidirectional clamping capability, <1.0ps response time, ≤1µA reverse leakage at VWM, AEC-Q101 qualification, and compliance with ISO 7637-2 for automotive surge immunity.
Technical Context
The P4SMA43CAH employs a glass-passivated silicon junction optimized for fast transient suppression in bidirectional signal and power lines. Its clamping behavior follows the 10/1000μs standard waveform, delivering 59.3V maximum clamping voltage (VC) at 7.0A peak impulse current (IPPM), with temperature coefficient of VBR at 0.101%/°C.
Designed for automated SMT placement, it features matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. The device operates across –55°C to +150°C junction temperature range and meets UL 94V-0 flammability rating in its DO-214AC molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 40.9–45.2V: Ensures reliable breakdown activation above system operating voltage while avoiding false triggering |
| VWM | 36.8V: Maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit DC rail |
| VC @ IPPM=7.0A | 59.3V: Clamped voltage during 10/1000μs surge; defines worst-case overvoltage seen by downstream ICs |
| IPPM | 7.0A: Peak surge current handling under standardized waveform; determines survivability against ISO 7637-2 Pulse 3b |
| PPPM | 400W: Peak pulse power rating at TA=25°C; derates linearly above ambient per Fig.2 |
| IR @ VWM | ≤1µA: Ultra-low reverse leakage ensures minimal power loss and no interference with high-impedance sensing nodes |
| TJ Range | –55°C to +150°C: Enables deployment in under-hood automotive and industrial environments without thermal derating penalties |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Weight: 0.060g. Molding compound meets UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking required; either terminal serves as anode or cathode depending on transient polarity |
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 vs. epoxy-passivated alternatives, critical for harsh-environment operation |
| ISO 7637-2 compliance | Guarantees robustness against real-world automotive load-dump and inductive-switching transients (Pulse 1/2a/2b/3a/3b) |
| Fast response time | <1.0ps junction response enables clamping before sensitive downstream logic or analog circuitry is damaged |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow; supports standard SMT assembly without special handling |
Applications
| Automotive On-Board DC/DC Converter | Industrial Switching Mode Power Supply (SMPS) |
|---|---|
Use Scenario: Protection of 36V nominal input rails in vehicle infotainment or ADAS domain controllers against battery line transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at DC/DC input filter stage to clamp ISO 7637-2 Pulse 2b (inductive switch-off) and Pulse 3b (capacitive coupling). Use Value: Limits voltage excursion to ≤59.3V during 7.0A surges, preventing latch-up or gate oxide damage in synchronous buck controller ICs. | Use Scenario: Input-stage surge protection in factory automation PSUs exposed to relay switching noise and motor drive coupling. IC Role / Device Role / Timing Role: Primary-line TVS absorbing repetitive 400W transients without degradation, maintaining stable 36.8V stand-off during normal 36V operation. Use Value: Enables >100,000 surge cycles at rated conditions due to low clamping ratio (VC/VBR ≈ 1.31) and thermally robust DO-214AC package. |
| LED Driver Module | Automotive Lighting Control Unit |
Use Scenario: Overvoltage protection for constant-current LED drivers in commercial lighting systems with long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamping element across driver input terminals to suppress induced surges from nearby AC mains or relay loads. Use Value: ≤1µA leakage at 36.8V prevents standby current drift in energy-sensitive designs; 0.101%/°C VBR TC ensures stable threshold across ambient temperature swings. | Use Scenario: Transient suppression on LIN bus power rails and LED string supplies in headlamp control modules. IC Role / Device Role / Timing Role: AEC-Q101-qualified TVS providing fail-safe protection during cold-crank and jump-start events where battery voltage dips then surges. Use Value: Withstands –55°C to +150°C junction range and passes JESD201 Class 2 whisker test, ensuring long-term reliability in sealed lamp housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | 600W rating, DO-214AA (SMB) package, 59.3V VC @ 10.1A | Higher power handling but larger footprint; requires PCB layout revision | Select when surge energy exceeds 400W or higher IPPM margin is needed |
| 1.5KE43CA | 1500W rating, DO-201AD (Axial) package, 61.9V VC @ 24.8A | Through-hole mounting only; unsuitable for automated SMT production | Select only for prototyping or legacy through-hole designs where rework is acceptable |
Compared with SMBJ43CA and 1.5KE43CA, the P4SMA43CAH offers optimal balance of AEC-Q101 qualification, DO-214AC SMT compatibility, and precise 36.8V VWM alignment with 36V automotive systems-enabling drop-in replacement in space-constrained, high-reliability applications without layout or process changes.
Availability
P4SMA43CAH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, industrial switching mode power supplies, and LED driver modules requiring stable component supply with AEC-Q101 assurance and ISO 7637-2 compliance.
Supply support for P4SMA43CAH 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 P4SMA series targets automotive and industrial transient protection, engineered specifically for surface-mount compatibility, high-reliability surge immunity, and seamless integration into ISO 7637-2-compliant power architectures.
FAQ
What does the 'CAH' suffix indicate in P4SMA43CAH?
The 'CAH' suffix in P4SMA43CAH denotes a bidirectional configuration with tightened breakdown voltage tolerance (40.9–45.2V) and AEC-Q101 qualification. Unlike unidirectional 'H' variants, the 'CAH' version has symmetrical terminals and no cathode marking-enabling use in AC-coupled or polarity-agnostic protection paths. This specification is confirmed in the official Taiwan Semiconductor datasheet Version A2102, page 2.
Is P4SMA43CAH compatible with lead-free reflow soldering processes?
Yes, P4SMA43CAH supports lead-free reflow soldering per J-STD-002. Its matte tin-plated leads are rated for peak temperatures up to 260°C, and its DO-214AC package is classified as Moisture Sensitivity Level 1-eliminating pre-bake requirements. The device's UL 94V-0 molding compound also withstands multiple reflow cycles without delamination or parameter shift.
How does P4SMA43CAH perform under repeated surge stress?
P4SMA43CAH maintains stable clamping performance over repeated 10/1000μs surges up to its rated 400W peak power, provided ambient temperature remains within derating limits (Fig.2). Its glass-passivated junction minimizes parameter drift after >10,000 pulses at 75% of IPPM, as verified in Taiwan Semiconductor's AEC-Q101 stress testing report for the P4SMA family.
Can P4SMA43CAH replace P4SMA43AH in existing designs?
No-P4SMA43CAH is not a direct replacement for P4SMA43AH. While both share the same VBR range (40.9–45.2V), P4SMA43AH is unidirectional (cathode-banded), whereas P4SMA43CAH is bidirectional (no polarity marking). Substituting them requires verifying circuit topology: bidirectional use mandates CAH; unidirectional DC rails require AH or CH variants.
What is the maximum clamping voltage of P4SMA43CAH at its rated surge current?
The maximum clamping voltage (VC) of P4SMA43CAH is 59.3V at 7.0A peak impulse current (IPPM) under the standardized 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and appears in the Electrical Specifications table on page 3 of the Taiwan Semiconductor P4SMA6.8(A)H–P4SMA200(A)H datasheet (Version A2102), confirming worst-case overvoltage protection for downstream components.
P4SMA43CAH 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 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)
P4SMA43CAH FAQ
1.How can I place an order for P4SMA43CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43CAH 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 P4SMA43CAH reliable?
The price and inventory of P4SMA43CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43CAH is usually 5 days.
3.What payment methods are accepted for P4SMA43CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43CAH?
P4SMA43CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43CAH 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 P4SMA43CAH?
For technical support, including P4SMA43CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43CAH requirements.
6.How does Aetrix verify that P4SMA43CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA43CAH 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 P4SMA43CAH meets industry standards.
7.What is the process for return or replacement of P4SMA43CAH?
All P4SMA43CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43CAH, 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 P4SMA43CAH part is unused and in its original packaging.
Return procedure for P4SMA43CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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