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Taiwan Semiconductor Corporation P6SMB51
- Part No.:
- P6SMB51
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51.pdf
- Description:
- 600W, 51V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,236
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Product details
Overview
P6SMB51 from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 45.9–56.1V, stand-off voltage of 41.3V, and clamping voltage of 73.5V at 8.5A peak pulse current. It features low-profile DO-214AA (SMB) packaging, glass-passivated junction, and meets ISO 7637-2 for automotive transients.
For engineers reviewing the P6SMB51 datasheet, P6SMB51 pinout, P6SMB51 application, or P6SMB51 equivalent, key selection criteria include its 73.5V clamping performance under 10/1000μs surge, <1μA leakage at 41.3V, 150°C max junction temperature, and suitability for DC power rail protection in switching supplies and adapters where fast response (<1ps) and robust 600W pulse handling are required.
Technical Context
The P6SMB51 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR (min 45.9V), clamping transient energy to protect downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage.
Designed for 10/1000μs waveform compliance, it delivers 73.5V clamping at 8.5A IPPM with thermal resistance RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable operation up to 150°C junction temperature in compact SMB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 45.9V / 56.1V - defines minimum and maximum voltage at which avalanche conduction begins under 1mA test current |
| VWM | 41.3V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 73.5V at 8.5A - clamped voltage during 10/1000μs surge, directly limiting stress on protected ICs |
| PPPSM | 600W - non-repetitive peak pulse power rating, defining transient energy absorption capability |
| IR @ VWM | <1μA - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| TJ max | 150°C - maximum allowable junction temperature, supporting operation in thermally constrained environments |
| RθJA | 55°C/W - thermal resistance from junction to ambient, critical for PCB layout and heatsinking decisions |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads, RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential node in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., +12V rail); conducts during overvoltage to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0ps - enables suppression before sensitive components experience damaging voltage overshoot |
| Glass-passivated junction | Stable VBR tolerance and low IR drift across temperature and lifetime |
| ISO 7637-2 compliance | Validated for Pulse 1/2a/2b/3a/3b - suitable for automotive power line transient protection without additional filtering |
| Moisture sensitivity level | Level 1 per J-STD-020 - allows standard SMT reflow without dry-pack or baking requirements |
| UL 94V-0 molding compound | Flame-retardant encapsulation - meets safety standards for enclosed power electronics |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Protection of primary-side DC bus and secondary-side output rails against load dump, inductive kickback, and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input/output terminals to clamp transients before they reach controller ICs or rectifiers. Use Value: 73.5V clamping at 8.5A limits voltage stress on 60V-rated MOSFETs and PWM controllers, preserving reliability in 48V-input SMPS designs. | Use Scenario: Input-stage surge suppression in wall-mounted and desktop AC-DC adapters subject to line surges and lightning-induced transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on bulk capacitor input to absorb 600W pulses without degradation over 100,000+ cycles. Use Value: 41.3V VWM supports 36–42V nominal adapter outputs while maintaining sub-1μA leakage, minimizing no-load power loss. |
| Flat Panel TV Power Boards | Computer Monitor DC Power Inputs |
Use Scenario: Protection of main 12V/24V logic and backlight power rails against hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Point-of-load TVS mounted near connector entry to intercept transients before reaching DC-DC converters and display drivers. Use Value: DO-214AA footprint enables high-density placement; 150°C TJ rating sustains performance in sealed, fanless TV enclosures. | Use Scenario: Input rail protection on monitor internal power modules exposed to USB-C PD negotiation spikes and ESD from external cables. IC Role / Device Role / Timing Role: Bidirectional-capable variant (P6SMB51CA) not applicable here; unidirectional P6SMB51 used for positive-rail-only clamping with cathode to rail. Use Value: 73.5V clamping ensures compatibility with 60V-rated monitor power ICs, preventing latch-up or gate oxide damage during 1kV/0.5Ω contact ESD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A (Bourns) | Same DO-214AA package, 51V nominal, 73.5V clamping, but rated at 600W with tighter VBR tolerance (48.5–53.6V) | Identical use cases; slightly higher VWM (43.6V) improves noise margin in noisy 48V systems | Select SMBJ51A if tighter VBR distribution and higher VWM are prioritized for margin-critical designs |
| 1.5SMC51A (ON Semiconductor) | Same electrical specs and DO-214AB (SMC) package - larger footprint (7.11 × 6.22 mm vs. SMB's 4.57 × 3.94 mm) | Requires PCB layout change; better thermal dissipation (RθJA ≈ 40°C/W) for high-duty-cycle surge environments | Choose 1.5SMC51A only when board space permits and enhanced thermal performance justifies rework |
Compared with SMBJ51A and 1.5SMC51A, the P6SMB51 offers identical clamping and power rating in the smaller DO-214AA footprint, making it optimal for space-constrained 48V power rails where VWM margin and thermal constraints are balanced.
Availability
P6SMB51 is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and flat-panel TV power boards requiring stable component supply, consistent surge performance, and RoHS-compliant manufacturing.
Supply support for P6SMB51 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 for industrial and consumer applications.
The P6SMB51 belongs to TSC's P6SMB series of 600W surface-mount TVS diodes, engineered for cost-effective, high-reliability transient suppression in compact power conversion systems with stringent automotive and industrial surge immunity requirements.
FAQ
What is the clamping voltage of the P6SMB51 and how is it measured?
The P6SMB51 has a maximum clamping voltage (VC) of 73.5V at 8.5A peak pulse current (IPPM) under the standardized 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35, with the device biased at its rated stand-off voltage and subjected to a single non-repetitive surge. The clamping voltage directly determines the maximum stress imposed on downstream components during transient events, and the P6SMB51 maintains this specification across its full operating temperature range.
Is the P6SMB51 unidirectional or bidirectional, and how is polarity identified?
The P6SMB51 is a unidirectional TVS diode, intended for protection of positive DC rails only. Polarity is marked by a cathode band on the DO-214AA package body - the banded end connects to the protected line (e.g., +48V), while the anode connects to ground. Bidirectional variants require "C" or "CA" suffixes (e.g., P6SMB51CA), which are electrically distinct and not interchangeable with the P6SMB51.
What is the maximum junction temperature rating for the P6SMB51 and why does it matter?
The P6SMB51 has a maximum junction temperature (TJ) rating of +150°C. This specification defines the upper thermal limit at which the device guarantees specified electrical performance and long-term reliability. Exceeding this temperature risks parametric shift, increased leakage, or catastrophic failure. Designers must consider RθJA = 55°C/W and ambient conditions when placing the P6SMB51 near heat sources or in sealed enclosures to ensure safe operation.
Does the P6SMB51 meet automotive transient standards, and which ones specifically?
Yes, the P6SMB51 meets ISO 7637-2 for automotive electrical disturbances, including Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a (switching spikes), and Pulse 3b (capacitive coupling). This compliance is verified per the manufacturer's test methodology and confirms suitability for 12V and 24V vehicle subsystems such as infotainment power supplies and body control modules - provided layout and grounding follow best practices.
What is the leakage current specification for the P6SMB51 at its stand-off voltage?
The P6SMB51 exhibits a maximum reverse leakage current (IR) of 1μA when biased at its stand-off voltage (VWM) of 41.3V and tested at 25°C. This ultra-low leakage ensures minimal power loss in always-on circuits and preserves signal integrity in high-impedance sensing nodes. The specification remains valid across the full -55°C to +150°C operating temperature range, with typical values well below 1μA at room temperature.
P6SMB51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 41.3V
- Voltage - Breakdown (Min):
- 45.9V
- Voltage - Clamping (Max) @ Ipp:
- 73.5V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB51 FAQ
1.How can I place an order for P6SMB51 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51 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 P6SMB51 reliable?
The price and inventory of P6SMB51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51 is usually 5 days.
3.What payment methods are accepted for P6SMB51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51?
P6SMB51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51 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 P6SMB51?
For technical support, including P6SMB51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51 requirements.
6.How does Aetrix verify that P6SMB51 is sourced from the original manufacturer or authorized distributors?
All P6SMB51 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 P6SMB51 meets industry standards.
7.What is the process for return or replacement of P6SMB51?
All P6SMB51 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51, 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 P6SMB51 part is unused and in its original packaging.
Return procedure for P6SMB51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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