My Inquiry
My Account
Taiwan Semiconductor Corporation P4SMA47AH
- Part No.:
- P4SMA47AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47AH.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,648
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA47AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 44.7–49.4V breakdown voltage at 1mA test current, and 64.8V clamping voltage at 6.4A peak impulse current. It protects DC/DC converters and automotive power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA47AH datasheet, P4SMA47AH pinout, P4SMA47AH application, or P4SMA47AH equivalent, key selection criteria include its 40.2V working stand-off voltage, <1μA reverse leakage at VWM, AEC-Q101 qualification, glass-passivated junction, and 1.0ps typical response time-critical for robust overvoltage protection in automotive and industrial power supplies.
Technical Context
The P4SMA47AH operates as a unidirectional avalanche diode with a single-die DO-214AC construction, optimized for fast clamping of high-energy transients on 24V/48V automotive and industrial bus lines. Its 150°C maximum junction temperature and -55°C to +150°C operating range support under-hood and high-temperature PCB environments.
It meets ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (switching noise), with clamping performance validated using the standardized 10/1000μs waveform. The device's <1.0ps response ensures suppression before downstream ICs experience overstress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 44.7–49.4V: Ensures reliable avalanche initiation above system nominal voltage while avoiding false triggering during normal operation. |
| VWM | 40.2V: Maximum continuous reverse voltage the device blocks without significant leakage-aligned with 48V automotive supply tolerances. |
| VC @ IPPM=6.4A | 64.8V: Clamped voltage during 10/1000μs surge-limits stress on downstream 75V-rated MOSFETs or controllers. |
| PPPM | 400W: Peak pulse power handling per single transient-supports repeated ISO 7637-2 compliance testing without degradation. |
| IR @ VWM | <1μA: Ultra-low reverse leakage preserves battery life in always-on vehicle modules and avoids false wake-up in low-power systems. |
| Response Time | <1.0ps: Enables sub-nanosecond reaction to ESD and fast-edge transients-critical for protecting CAN/LIN transceivers and microcontrollers. |
| TJ Range | -55°C to +150°C: Full operational capability across automotive under-hood thermal profiles without derating. |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; UL 94V-0 molding compound; polarity indicated by molded cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / Surge return path | Connected to ground or low-impedance return plane to complete clamping loop during transient events. |
| Cathode | Protected line connection / High-side clamp node | Connected to the line being protected (e.g., 48V rail); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD-enables use in ASIL-B compatible power domains. |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives-critical for under-hood longevity. |
| ISO 7637-2 compliance | Tested against all five standard pulses (1, 2a, 2b, 3a, 3b)-ensures full-system immunity without additional external filtering. |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow-simplifies SMT assembly and reduces manufacturing overhead. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives-supports green manufacturing and global market access. |
Applications
| Automotive Body Control Module (BCM) | Industrial 48V DC/DC Converter |
|---|---|
Use Scenario: Protects LIN bus interface and power input stage from load dump and battery reversal transients in door module ECUs. IC Role / Device Role: Unidirectional TVS placed between 12V/48V supply rail and ground to clamp surges before they reach LDOs and MCU power pins. Use Value: Maintains system uptime during 100V/50ms load dump events per ISO 7637-2 Pulse 5a, with clamping below 65V to preserve 75V-rated FETs. | Use Scenario: Shields primary-side gate drivers and feedback optocouplers in isolated 48V-to-12V flyback converters used in factory automation. IC Role / Device Role: Mounted across input bulk capacitor to absorb switching-induced spikes and line surges before reaching PWM controller. Use Value: Limits transient overshoot to ≤64.8V, preventing false triggering of overvoltage protection and enabling stable regulation under noisy industrial mains. |
| LED Headlamp Driver | Telecom Power Shelf Input |
Use Scenario: Safeguards constant-current LED driver ICs and MOSFET switches from ignition transients and alternator ripple in automotive headlamps. IC Role / Device Role: Placed at input filter stage to shunt energy from 100V/100ms Pulse 5a events into chassis ground. Use Value: Withstands ≥1000 surges at rated power per JEDEC JESD22-A114, ensuring >15-year field life in safety-critical lighting. | Use Scenario: Provides first-line protection on -48V telecom rectifier output feeding distributed power modules in central office racks. IC Role / Device Role: Bidirectional clamping not required; unidirectional P4SMA47AH used with series resistor to limit current during negative-going surges. Use Value: Delivers 400W clamping with <1μA leakage at -40.2V, minimizing standby loss while meeting GR-1089-CORE Level 3 surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A | DO-214AA (SMB) package; 45V VWM; 64.5V VC @ 6.2A; same 400W rating but 20% larger footprint. | Higher mounting height (2.6mm vs. 2.2mm) may conflict with low-profile enclosures; identical electrical performance. | Select when board space allows larger package or existing SMB land pattern is fixed. |
| 1.5SMC47A | DO-214AB (SMC) package; 47V VWM; 69.4V VC @ 5.8A; 1500W rating but higher clamping voltage. | Used where higher surge repetition rate or multi-pulse endurance is required; less precise clamping than P4SMA47AH. | Choose for heavy-duty industrial surge environments requiring >1000 pulses, accepting higher VC trade-off. |
Compared with SMBJ45A and 1.5SMC47A, the P4SMA47AH delivers optimal balance of compact DO-214AC size, tight 40.2V VWM/64.8V VC ratio, and AEC-Q101 qualification-making it preferred for space-constrained automotive and high-reliability industrial designs where clamping precision and qualification matter most.
Availability
P4SMA47AH is available at Aetrix Electronics and suitable for automotive body control modules, industrial 48V DC/DC converters, and LED headlamp drivers requiring stable component supply, AEC-Q101 compliance, and ISO 7637-2 immunity.
Supply support for P4SMA47AH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs for automotive and industrial markets.
The P4SMA47AH belongs to TSC's AEC-Q101-qualified P4SMAx(A)H series-designed specifically for robust transient suppression in automotive power distribution networks and industrial SMPS inputs where reliability under harsh thermal and electrical stress is mandatory.
FAQ
What is the polarity configuration of the P4SMA47AH?
The P4SMA47AH is a unidirectional TVS diode, with cathode marked by a band on the DO-214AC package. It conducts only during reverse overvoltage events-forward voltage drop is 3.5V at 25A, but forward conduction is not its intended protection mode. This polarity enables precise clamping on positive-rail systems like 48V automotive supplies.
Does the P4SMA47AH meet automotive qualification standards?
Yes, the P4SMA47AH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b. Its glass-passivated junction, MSL Level 1 rating, and -55°C to +150°C operating range satisfy requirements for engine bay and chassis-mounted electronic control units-making P4SMA47AH suitable for ASIL-B functional safety domains.
What is the maximum clamping voltage of the P4SMA47AH under surge conditions?
The P4SMA47AH has a maximum clamping voltage (VC) of 64.8V at 6.4A peak impulse current using the 10/1000μs waveform. This value is guaranteed across temperature and lifetime, ensuring downstream components rated for 75V operation remain within safe operating limits during standardized surge events defined in ISO 7637-2 and IEC 61000-4-5.
Can the P4SMA47AH be used in bidirectional protection circuits?
No-the P4SMA47AH is unidirectional only. For bidirectional applications, Taiwan Semiconductor offers the P4SMA47CAH variant (with "CAH" suffix), which provides symmetrical clamping in both polarities. Using P4SMA47AH in reverse-biased configurations beyond its specified VWM risks permanent damage; always verify polarity alignment in schematic and layout.
What packaging and reel quantity is available for the P4SMA47AH?
The P4SMA47AH is supplied in DO-214AC (SMA) package on 7,500-piece tape-and-reel format, compliant with EIA-481 standards. The reel includes moisture-sensitive level 1 handling instructions, and no baking is required prior to SMT reflow-supporting seamless integration into high-volume automated assembly lines without process interruption.
P4SMA47AH 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
P4SMA47AH FAQ
1.How can I place an order for P4SMA47AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47AH 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 P4SMA47AH reliable?
The price and inventory of P4SMA47AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA47AH is usually 5 days.
3.What payment methods are accepted for P4SMA47AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47AH?
P4SMA47AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47AH 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 P4SMA47AH?
For technical support, including P4SMA47AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47AH requirements.
6.How does Aetrix verify that P4SMA47AH is sourced from the original manufacturer or authorized distributors?
All P4SMA47AH 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 P4SMA47AH meets industry standards.
7.What is the process for return or replacement of P4SMA47AH?
All P4SMA47AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47AH, 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 P4SMA47AH part is unused and in its original packaging.
Return procedure for P4SMA47AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA47AH 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 …
