My Inquiry
My Account
Taiwan Semiconductor Corporation P4SMA43AH
- Part No.:
- P4SMA43AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA43AH.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,265
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA43AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power (10/1000μs), with 40.9–45.2V breakdown voltage (VBR), 36.8V working stand-off voltage (VWM), and 59.3V maximum clamping voltage (VC) at 7.0A peak impulse current - deployed for overvoltage protection in automotive DC/DC converters and industrial power adapters.
For engineers reviewing the P4SMA43AH datasheet, P4SMA43AH pinout, P4SMA43AH application, or P4SMA43AH equivalent, key selection criteria include its AEC-Q101 qualification, <1.0ps response time, <1μA reverse leakage at VWM, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
The P4SMA43AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient suppression with low capacitance and stable clamping performance across -55°C to +150°C junction temperature range. Its 1.0mA test current (IT) and 0.101%/°C VBR temperature coefficient ensure predictable voltage threshold behavior under thermal stress.
Designed for single-die, single-direction surge protection, it meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - confirming suitability for high-reliability reflow assembly without preconditioning. Polarity is marked by cathode band per DO-214AC standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 40.9–45.2V - defines minimum and maximum guaranteed avalanche initiation voltage under standardized test conditions |
| VWM | 36.8V - maximum continuous reverse operating voltage before significant leakage begins; sets system-level DC bias limit |
| VC @ IPPM=7.0A | 59.3V - clamped voltage during 10/1000μs surge; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 400W - peak pulse power handling capability; defines survivability against standardized lightning/surge transients |
| IR @ VWM | <1μA - ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance nodes |
| TJ max | +150°C - maximum junction temperature rating enables operation in under-hood automotive or enclosed industrial environments |
| Response time | <1.0ps - sub-picosecond turn-on enables suppression of ESD and fast-rising transients before downstream IC damage occurs |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-ended unidirectional configuration with molded epoxy case (UL 94V-0), matte tin-plated leads, and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during forward surge or bias |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 48V rail); enters breakdown when reverse voltage exceeds VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood ECUs and ADAS power rails |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives, critical for field-deployed industrial equipment |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - meets OEM automotive EMC requirements |
| DO-214AC (SMA) footprint | Standardized 2.54mm pitch, 4.2mm × 2.6mm body - enables drop-in replacement and compatibility with existing SMT pick-and-place tooling |
| Moisture Sensitivity Level 1 | No baking required prior to reflow; supports unlimited floor life and eliminates process overhead in high-volume manufacturing |
Applications
| Automotive DC/DC Converters | Industrial Power Adapters |
|---|---|
Use Scenario: Protection of 48V-to-12V buck converter input against load dump and alternator transients in mild-hybrid vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges before they reach controller IC and MOSFET gate drivers. Use Value: Withstands 400W pulses and clamps to ≤59.3V, preventing overvoltage failure of 60V-rated power stage components while maintaining AEC-Q101 compliance. |
Use Scenario: Input-stage surge suppression in DIN-rail mounted 24V industrial power supplies exposed to switching noise and induced transients. IC Role / Device Role / Timing Role: Primary overvoltage guard on AC/DC rectified output or DC input bus, operating in parallel with bulk capacitors. Use Value: Sub-1μA leakage at 36.8V VWM avoids efficiency loss; DO-214AC package allows high-density layout without thermal derating penalties. |
| LED Driver Modules | On-Board Battery Management |
Use Scenario: Transient protection for constant-current LED drivers in streetlight and signage applications subject to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver IC supply pins to absorb energy from coupled transients on long cable runs. Use Value: 59.3V clamping ensures driver ICs rated for 60V operation remain within safe operating area during 10/1000μs events. |
Use Scenario: Voltage rail protection in 12V/24V battery monitoring circuits where sensor inputs and MCU power rails require robust ESD immunity. IC Role / Device Role / Timing Role: Low-leakage TVS on BMS analog front-end supply lines to prevent latch-up or ADC offset shift during board-level ESD events. Use Value: <1μA leakage preserves measurement accuracy; 0.101%/°C VBR TC minimizes calibration drift across automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | 600W rating, SMB (DO-214AA) package, 43.0–47.5V VBR, 69.4V VC @ 8.7A | Higher power handling but larger footprint; requires PCB layout revision | Select when higher surge margin is needed and space permits larger package |
| 1.5SMC43A | 1500W rating, SMC (DO-214AB) package, 43.0–47.5V VBR, 69.4V VC @ 21.7A | Triple power rating and higher surge current capacity; incompatible pinout and thermal profile | Choose for heavy-duty industrial systems requiring >1kW transient immunity and forced-air cooling |
Compared with P4SMA43AH, SMBJ43A offers higher peak power but demands more board area, while 1.5SMC43A delivers significantly greater surge endurance at the cost of package size and thermal mass - making P4SMA43AH optimal for space-constrained, AEC-Q101–compliant 400W protection.
Availability
P4SMA43AH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial power adapters, and LED driver modules requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA43AH 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–qualified product lines.
The P4SMA43AH belongs to TSC's P4SMAx(A)H series of surface-mount TVS diodes engineered specifically for automotive and industrial transient suppression - balancing high surge capability, tight voltage tolerances, and SMT manufacturability.
FAQ
What is the polarity configuration of the P4SMA43AH?
The P4SMA43AH is a unidirectional TVS diode, configured with anode and cathode terminals. Its cathode is marked by a band on the DO-214AC (SMA) package body. It conducts in forward bias and clamps in reverse bias above VBR. Bidirectional variants use CH or CAH suffixes - the P4SMA43AH itself is strictly unidirectional and must be oriented correctly in-circuit to protect against negative-going transients on the cathode side.
Does the P4SMA43AH meet automotive qualification standards?
Yes, the P4SMA43AH is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22. It also complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms - confirming suitability for automotive power net protection in engine control units, body electronics, and infotainment systems.
What is the maximum clamping voltage of the P4SMA43AH under surge conditions?
The P4SMA43AH has a maximum clamping voltage (VC) of 59.3V at 7.0A peak impulse current (IPPM) using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper bound of voltage seen by downstream circuitry during a standardized surge event - critical for ensuring protected ICs remain within their absolute maximum ratings.
Can the P4SMA43AH be used in bidirectional protection applications?
No, the P4SMA43AH is unidirectional only. For bidirectional protection, Taiwan Semiconductor offers variants with CH or CAH suffixes (e.g., P4SMA43CH), which integrate two opposing diodes in a single DO-214AC package. Using P4SMA43AH in reverse-biased configurations beyond its specified VWM risks permanent breakdown and failure - always verify polarity during layout and assembly.
What is the moisture sensitivity level (MSL) and reflow profile guidance for P4SMA43AH?
The P4SMA43AH is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow soldering. It supports standard lead-free reflow profiles up to peak temperatures of 260°C, with matte tin-plated leads meeting J-STD-002 solderability requirements - enabling seamless integration into high-throughput SMT lines without special handling.
P4SMA43AH 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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA43AH FAQ
1.How can I place an order for P4SMA43AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA43AH 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 P4SMA43AH reliable?
The price and inventory of P4SMA43AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA43AH is usually 5 days.
3.What payment methods are accepted for P4SMA43AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA43AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA43AH?
P4SMA43AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA43AH 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 P4SMA43AH?
For technical support, including P4SMA43AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA43AH requirements.
6.How does Aetrix verify that P4SMA43AH is sourced from the original manufacturer or authorized distributors?
All P4SMA43AH 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 P4SMA43AH meets industry standards.
7.What is the process for return or replacement of P4SMA43AH?
All P4SMA43AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA43AH, 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 P4SMA43AH part is unused and in its original packaging.
Return procedure for P4SMA43AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA43AH 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
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 …
