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Taiwan Semiconductor Corporation P4SMA75H
- Part No.:
- P4SMA75H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA75H.pdf
- Description:
- 400W, 75V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,801
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Product details
Overview
P4SMA75H from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 67.5–82.5V breakdown voltage (VBR), 60.7V working stand-off voltage (VWM), 108V maximum clamping voltage (VC) at 3.8A peak pulse current, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the P4SMA75H datasheet, P4SMA75H pinout, P4SMA75H application, or P4SMA75H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, moisture sensitivity level (MSL 1), DO-214AC (SMA) package compatibility, and unidirectional surge handling up to 400W with sub-1ps response time.
Technical Context
The P4SMA75H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient response (<1.0ps) and low leakage (<1µA at VWM). Its clamping behavior follows the 10/1000µs standard waveform, with thermal derating above 25°C per Fig.2 and peak power capability defined by non-repetitive pulse limits.
Designed for single-die configuration in DO-214AC (SMA) packaging, it supports automated placement and meets JESD201 Class 2 whisker resistance, UL 94V-0 flammability, and RoHS/halogen-free compliance per IEC 61249-2-21 - critical for automotive and industrial board-level ESD/surge protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 67.5–82.5V: Ensures reliable avalanche conduction onset within specified tolerance band during overvoltage events |
| VWM | 60.7V: Maximum continuous reverse operating voltage without significant leakage current |
| VC @ IPPM=3.8A | 108V: Clamped voltage during 10/1000µs surge, defining protected circuit's maximum stress level |
| PPPM | 400W: Peak pulse power dissipation capability under standardized surge waveform |
| IR @ VWM | <1µA: Minimal standby power loss and negligible loading on protected line |
| TJ Range | −55°C to +150°C: Enables operation in under-hood automotive and high-temperature industrial environments |
| Package | DO-214AC (SMA): Standardized SMD footprint compatible with IPC-7351B land patterns and reflow assembly |
Pinout & Package
DO-214AC (SMA) package: Surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to protected line; conducts during forward-biased surges or fault conditions |
| Cathode | Ground/reference side terminal | Connected to system ground or return path; defines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and infotainment systems |
| Glass passivated junction | Enhances long-term reliability and stability of breakdown voltage under thermal cycling and humidity stress |
| Clamping voltage ≤108V @ 3.8A | Provides predictable overvoltage limiting for 60V-class systems such as 48V mild-hybrid power networks |
| Response time <1.0ps | Protects sensitive downstream ICs before transient energy propagates through PCB traces |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with automotive load dump and inductive switching immunity requirements |
Applications
| Automotive Power Distribution | Industrial DC/DC Converters |
|---|---|
Use Scenario: Protection of 48V battery-fed ECUs against load dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input rail to clamp surges before DC/DC controller input stage. Use Value: Limits voltage to ≤108V during 400W ISO 7637-2 Pulse 5a events, preventing damage to buck converter MOSFETs and gate drivers. |
Use Scenario: Input-side surge suppression in isolated 24V-to-5V industrial DC/DC modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side output rail to safeguard downstream logic and sensors. Use Value: Maintains safe output voltage during lightning-induced ring waves (IEC 61000-4-5) due to low clamping ratio (VC/VWM = 1.78). |
| LED Driver Power Supplies | Telecom Power Interfaces |
Use Scenario: Overvoltage protection in constant-current LED drivers used in street lighting and signage. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver input capacitor to absorb inductive kickback from relay-controlled mains switching. Use Value: Withstands repetitive 400W pulses without degradation, ensuring >10-year field life in outdoor deployments. |
Use Scenario: Surge protection on PoE-powered device inputs (IEEE 802.3af/at) exposed to Ethernet cable coupling. IC Role / Device Role / Timing Role: Front-end TVS on DC input line to limit induced transients from nearby AC wiring or EFT bursts. Use Value: Sub-1ps response ensures clamping occurs before PoE controller ICs experience latch-up or gate oxide rupture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | Bidirectional variant; higher VWM (64.1V), same VC (108V), identical DO-214AA package | Required where bidirectional surge protection (e.g., data lines, AC-coupled signals) is needed | Select P4SMA75H for unidirectional DC rail protection; SMBJ75A only if symmetrical clamping is mandated |
| 1.5SMC75A | Higher power rating (1500W), larger DO-214AB package, VC = 121V at 12.3A | Suitable for higher-energy transients (e.g., 10/1000µs surges exceeding 400W) | Choose P4SMA75H when space-constrained layouts and 400W compliance are sufficient; 1.5SMC75A adds footprint and cost without benefit for standard automotive pulses |
Compared with SMBJ75A and 1.5SMC75A, the P4SMA75H offers optimal balance of compact DO-214AC footprint, AEC-Q101 qualification, and precise 60.7V stand-off for 48V system protection - making it preferred for space-limited automotive and industrial DC rails where unidirectional clamping suffices.
Availability
P4SMA75H is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC/DC converters, LED driver supplies, and telecom power interfaces requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for P4SMA75H 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 automotive and industrial certifications.
The P4SMA75H belongs to TSC's AEC-Q101-qualified P4SMAxH series, engineered specifically for robust, surface-mount transient suppression in harsh-environment automotive and industrial power systems.
FAQ
What is the maximum clamping voltage of the P4SMA75H under standard surge conditions?
The P4SMA75H exhibits a maximum clamping voltage (VC) of 108V when subjected to a 10/1000µs waveform with a peak impulse current (IPPM) of 3.8A. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the P4SMA75H suitable for automotive applications?
Yes, the P4SMA75H is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its −55°C to +150°C operating junction temperature range, MSL Level 1 moisture sensitivity, and glass-passivated junction make it appropriate for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is essential.
What does the "H" suffix indicate in P4SMA75H?
The "H" suffix in P4SMA75H denotes the unidirectional configuration of the TVS diode, distinguishing it from bidirectional variants (e.g., P4SMA75AH). It confirms cathode-band polarity marking, forward voltage specification (VF = 3.5V at 25A), and applicability in DC rail protection where surge direction is known and controlled - unlike bidirectional types intended for AC or differential signal lines.
How does the P4SMA75H compare to the P4SMA75AH variant?
The P4SMA75AH is the bidirectional counterpart with tighter VBR tolerance (71.3–78.8V vs. 67.5–82.5V) and slightly higher VWM (64.1V vs. 60.7V), but identical VC (103V) and power rating (400W). The P4SMA75H remains preferred for unidirectional DC protection due to its lower VWM, enabling earlier clamping onset and better margin against normal operating voltage excursions.
What package type is used for the P4SMA75H and what are its assembly implications?
The P4SMA75H uses the DO-214AC (SMA) package - a standardized surface-mount outline with 2.54mm lead pitch and defined pad layout per IPC-7351B. It supports automated pick-and-place, reflow soldering per J-STD-020 MSL Level 1 (unlimited floor life), and complies with JESD201 Class 2 whisker resistance, making it suitable for high-volume automotive and industrial PCB assembly without special handling or baking requirements.
P4SMA75H 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):
- 60.7V
- Voltage - Breakdown (Min):
- 67.5V
- Voltage - Clamping (Max) @ Ipp:
- 108V
- Current - Peak Pulse (10/1000µs):
- 3.8A
- 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)
P4SMA75H FAQ
1.How can I place an order for P4SMA75H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA75H 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 P4SMA75H reliable?
The price and inventory of P4SMA75H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA75H is usually 5 days.
3.What payment methods are accepted for P4SMA75H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA75H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA75H?
P4SMA75H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA75H 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 P4SMA75H?
For technical support, including P4SMA75H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA75H requirements.
6.How does Aetrix verify that P4SMA75H is sourced from the original manufacturer or authorized distributors?
All P4SMA75H 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 P4SMA75H meets industry standards.
7.What is the process for return or replacement of P4SMA75H?
All P4SMA75H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA75H, 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 P4SMA75H part is unused and in its original packaging.
Return procedure for P4SMA75H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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