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Taiwan Semiconductor Corporation P4SMA91CH
- Part No.:
- P4SMA91CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91CH.pdf
- Description:
- 400W, 91V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:3,967
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Product details
Overview
P4SMA91CH from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with 81.9V–100V breakdown voltage (VBR), 73.7V working stand-off voltage (VWM), and 131V clamping voltage (VC) at 3.2A peak impulse current. It delivers fast sub-1ps response for automotive-grade surge protection in DC/DC converters and SMPS inputs.
For engineers reviewing the P4SMA91CH datasheet, P4SMA91CH pinout, P4SMA91CH application, or P4SMA91CH equivalent, this device is selected for ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, AEC-Q101 qualification, and low leakage (<1µA at VWM) in harsh-temperature (-55°C to +150°C) environments.
Technical Context
The P4SMA91CH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve stable clamping under repetitive 10/1000μs transients. Its thermal design supports 150°C maximum junction temperature with derating above 25°C ambient per Fig.2.
It meets ISO 7637-2 for automotive load-dump and switching-spike immunity, with polarity marked by cathode band and matte tin-plated leads compliant to J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 81.9V–100V min/max - defines reliable avalanche initiation threshold under standardized test conditions |
| VWM | 73.7V - maximum continuous reverse voltage before significant leakage begins; sets system operating margin |
| VC @ IPPM=3.2A | 131V - clamped voltage during 10/1000μs surge; determines protected circuit's peak stress level |
| PPPM | 400W - peak pulse power handling capacity; defines transient energy absorption capability |
| IR @ VWM | <1µA - ultra-low reverse leakage ensures minimal standby power loss in high-impedance bias networks |
| TJ Range | -55°C to +150°C - enables deployment in under-hood automotive and industrial power-conversion environments |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Weight: 0.060g. Molding compound rated UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 48V rail); cathode band identifies polarity for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including temperature cycling, HTRB, and ESD |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift across lifetime and temperature |
| Fast response time <1ps | Clamps transients before sensitive downstream ICs experience overvoltage damage |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Provides full-system-level immunity against battery-line disturbances in 12V/24V/48V vehicle architectures |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; compatible with automated placement and high-volume manufacturing |
Applications
| Automotive Infotainment Power Input | Industrial SMPS Secondary Side |
|---|---|
Use Scenario: Protecting USB-C PD controller and display interface ICs from load-dump spikes on 12V supply rails in head units. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input fuse and DC/DC converter input. Use Value: Limits transient voltage to ≤131V, preserving 16V-rated input capacitors and preventing latch-up in PMICs. | Use Scenario: Safeguarding synchronous rectifier MOSFET gate drivers in isolated flyback converters. IC Role / Device Role / Timing Role: Standoff-rated TVS across secondary-side output capacitor to absorb reflected switching noise and output short-circuit energy. Use Value: Maintains VWM = 73.7V margin above nominal 48V output, ensuring no conduction during normal operation while clamping surges within safe SOA limits. |
| LED Driver Module Input | On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: Suppressing inductive kickback from relay coils and motor drivers feeding constant-current LED strings. IC Role / Device Role / Timing Role: Primary-line TVS on 24V input stage upstream of buck controller and current-sense amplifier. Use Value: Withstands 400W pulses without degradation, enabling >100,000 surge cycles per JEDEC JESD22-A114 reliability testing. | Use Scenario: Protecting 5V/3.3V LDO regulators powering MCU and CAN transceivers in EV on-board chargers. IC Role / Device Role / Timing Role: Low-leakage (≤1µA) TVS placed after input filter but before LDO input capacitor. Use Value: Prevents reverse-bias leakage from compromising LDO regulation accuracy while providing <1ps response to CAN bus coupling transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | Higher VWM = 77.5V, same DO-214AA package, 600W rating | Better suited for 85–100V systems requiring higher standoff; larger footprint than SMA | Select when higher power margin or legacy SMB layout exists; not drop-in due to package size difference |
| 1.5SMC91A | Same VBR/VWM range, DO-214AB (SMC) package, 1500W rating | Designed for higher-energy surges; requires larger PCB area and different thermal pad layout | Choose for industrial UPS or telecom power where 1500W pulse handling is mandatory; incompatible pinout and thermal profile |
Compared with SMBJ90A and 1.5SMC91A, the P4SMA91CH offers optimal balance of AEC-Q101 compliance, DO-214AC compactness, and 400W capability-making it ideal for space-constrained automotive modules where ISO 7637-2 Pulse 2b immunity and moisture-level-1 manufacturability are critical.
Availability
P4SMA91CH is available at Aetrix Electronics and suitable for automotive infotainment, industrial SMPS, LED driver modules, and on-board charger auxiliary supplies requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for P4SMA91CH 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 P4SMA91CH belongs to TSC's AEC-Q101-qualified P4SMAxH series-designed specifically for robust, surface-mount transient suppression in automotive power distribution and industrial DC/DC conversion systems.
FAQ
What is the polarity configuration of the P4SMA91CH?
The P4SMA91CH is a unidirectional TVS diode, with cathode identified by a visible band on the DO-214AC (SMA) package body. It conducts only during reverse-biased overvoltage events, making it suitable for protecting positive-rail circuits where the cathode connects to the line under protection and the anode to ground. This configuration ensures zero forward conduction during normal operation.
Does the P4SMA91CH meet automotive qualification standards?
Yes, the P4SMA91CH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its glass-passivated junction, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1 ensure suitability for automotive under-hood and cabin applications, including infotainment and OBC subsystems.
What is the maximum clamping voltage of the P4SMA91CH under surge conditions?
The P4SMA91CH has a maximum clamping voltage (VC) of 131V at IPPM = 3.2A using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events-critical for ensuring downstream components remain within their absolute maximum ratings.
Can the P4SMA91CH be used in bidirectional configurations?
No-the P4SMA91CH is unidirectional only. For bidirectional surge protection, Taiwan Semiconductor specifies the P4SMA91AH variant (with "AH" suffix), which features symmetrical breakdown in both directions. Using the P4SMA91CH in reverse-biased AC applications risks permanent failure due to forward conduction beyond its 3.5V maximum instantaneous forward voltage rating.
What is the thermal derating behavior of the P4SMA91CH above 25°C ambient?
The P4SMA91CH's peak pulse power (400W) is derated linearly above 25°C ambient per Figure 2 in the datasheet, reaching ~200W at 100°C and zero at 150°C junction temperature. Designers must apply this derating curve when calculating worst-case surge capability in high-temperature enclosures, such as engine-control units or enclosed LED drivers.
P4SMA91CH 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):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- 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)
P4SMA91CH FAQ
1.How can I place an order for P4SMA91CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91CH 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 P4SMA91CH reliable?
The price and inventory of P4SMA91CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA91CH is usually 5 days.
3.What payment methods are accepted for P4SMA91CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91CH?
P4SMA91CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91CH 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 P4SMA91CH?
For technical support, including P4SMA91CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91CH requirements.
6.How does Aetrix verify that P4SMA91CH is sourced from the original manufacturer or authorized distributors?
All P4SMA91CH 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 P4SMA91CH meets industry standards.
7.What is the process for return or replacement of P4SMA91CH?
All P4SMA91CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91CH, 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 P4SMA91CH part is unused and in its original packaging.
Return procedure for P4SMA91CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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