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Taiwan Semiconductor Corporation P6SMB51AH
- Part No.:
- P6SMB51AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51AH.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,547
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Product details
Overview
P6SMB51AH from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 48.5–53.6 V, clamping voltage of 70.1 V at 8.9 A peak pulse current, and stand-off voltage of 43.6 V. It features glass-passivated junction, AEC-Q101 qualification, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive ESD and load-dump protection.
For engineers reviewing the P6SMB51AH datasheet, P6SMB51AH pinout, P6SMB51AH application, or P6SMB51AH equivalent, key selection criteria include its DO-214AA (SMB) package compatibility, 1.0 mA test current for VBR, <1 µA reverse leakage at VWM, 10 °C/W junction-to-case thermal resistance, and suitability for automotive power line and CAN bus node protection.
Technical Context
The P6SMB51AH operates as a unidirectional avalanche diode, activated when reverse voltage exceeds its minimum breakdown threshold of 48.5 V. Its clamping action limits transients to ≤70.1 V under 8.9 A 10/1000 µs surge, delivering robust protection for 12 V and 24 V automotive subsystems.
Designed for AEC-Q101 compliance, it supports operation from −55 °C to +150 °C junction temperature, with moisture sensitivity level 1 (J-STD-020), matte tin-plated leads, and UL 94V-0 molding compound - enabling reliable automated SMT assembly in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V - defines guaranteed avalanche initiation range at 1.0 mA test current |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 70.1 V at 8.9 A - peak clamped voltage during 10/1000 µs transient, limiting stress on downstream ICs |
| PPPSM | 600 W - non-repetitive peak pulse power handling per standard 10/1000 µs waveform |
| IR @ VWM | ≤1 µA - ultra-low reverse leakage ensures minimal standby power loss and signal integrity |
| TJ max | +150 °C - enables placement near heat sources in engine control units and body electronics |
| RθJC | 10 °C/W - low thermal resistance supports sustained power dissipation in compact PCB layouts |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-diode configuration with cathode band marking. Dimensions conform to JEDEC DO-214AA standard; recommended pad layout provided in manufacturer datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12 V supply rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity exposure |
| Fast response time | Typically <1.0 ps - ensures clamping activation before transient energy damages sensitive logic or analog inputs |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD-coupled fast transients) |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow - simplifies manufacturing and eliminates moisture-related popcorning risk |
Applications
| Automotive Power Line Protection | CAN Bus Node Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator-induced surges. IC Role / Device Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients above 43.6 V. Use Value: Limits peak voltage to 70.1 V during 8.9 A surge, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Shielding high-speed CAN transceivers (e.g., TJA1042) from ESD and coupled fast transients on differential bus lines. IC Role / Device Role: Paired unidirectional TVS devices (one per line) referenced to common ground, leveraging low capacitance and fast response. Use Value: Sub-1 ps response and <1 µA leakage preserve signal integrity while meeting IEC 61000-4-2 Level 4 (±15 kV contact discharge) requirements. |
| Industrial Sensor Interface Protection | LED Lighting Driver Input Protection |
Use Scenario: Safeguarding 4–20 mA current-loop sensors and analog front-ends in factory automation systems exposed to relay switching noise. IC Role / Device Role: TVS mounted at connector entry point to absorb inductive kickback and EFT bursts before reaching precision ADCs or op-amps. Use Value: Clamping at 70.1 V prevents latch-up in 5 V or 3.3 V signal conditioning circuits while maintaining <1 µA bias error. | Use Scenario: Protecting constant-current LED drivers from mains-borne surges and lightning-induced spikes in outdoor lighting fixtures. IC Role / Device Role: Primary overvoltage clamp on bulk input stage (e.g., post-bridge rectifier, pre-PFC), rated for 600 W peak pulse power. Use Value: Withstands repetitive 600 W transients without degradation, extending driver lifetime in high-surge environments (IEC 61000-4-5 Level 3). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Same DO-214AA package, identical VBR (48.5–53.6 V), but rated for 600 W with slightly higher VC = 72.7 V at 8.3 A | Marginally lower peak pulse current rating; may require layout review if operating near absolute IPPM limit | Select SMBJ51A only if legacy design uses it and no clamping voltage margin reduction is acceptable |
| 1.5SMC51A | Higher-power 1500 W variant in larger DO-214AB (SMC) package; same VBR range but VC = 70.1 V at 21.4 A | Requires PCB footprint change; suited for systems needing higher surge endurance beyond single-event 600 W | Choose 1.5SMC51A when system-level testing reveals insufficient margin with 600 W rating or when board space allows larger package |
Compared with SMBJ51A and 1.5SMC51A, the P6SMB51AH offers optimal balance of compact DO-214AA footprint, AEC-Q101 qualification, and precise 70.1 V clamping - making it preferred for space-constrained automotive modules where thermal and reliability validation are mandatory.
Availability
P6SMB51AH is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and LED driver input surge suppression requiring stable component supply across extended production lifecycles.
Supply support for P6SMB51AH 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 automotive, industrial, and consumer markets.
The P6SMB51AH belongs to TSC's AEC-Q101-qualified P6SMBx(A)H series - engineered specifically for robust transient suppression in 12 V/24 V automotive power networks and high-reliability industrial interfaces.
FAQ
What is the polarity configuration of the P6SMB51AH?
The P6SMB51AH is a unidirectional TVS diode, with cathode marked by a band on the DO-214AA package. It conducts only when reverse-biased above its breakdown voltage, making it suitable for DC rail protection where polarity is fixed - unlike bidirectional variants (e.g., P6SMB51AH's counterpart P6SMB51CAH) used in AC or differential line applications.
Does the P6SMB51AH meet automotive qualification standards?
Yes, the P6SMB51AH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its construction - including glass-passivated junction, matte tin-plated leads, and moisture sensitivity level 1 - satisfies automotive manufacturing and field reliability requirements for under-hood and body-control module applications.
What is the maximum clamping voltage of the P6SMB51AH under surge conditions?
The P6SMB51AH has a maximum clamping voltage (VC) of 70.1 V at 8.9 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across temperature and represents the upper limit of voltage seen by protected circuitry during worst-case transient events.
Can the P6SMB51AH be used in bidirectional signal lines like RS-485 or CAN?
No - the P6SMB51AH is unidirectional and unsuitable for bidirectional data lines without external circuitry. For CAN or RS-485 protection, use the bidirectional variant P6SMB51CAH (with CAH suffix), which provides symmetrical clamping in both polarities and matches the same VBR, VC, and package dimensions as the P6SMB51AH.
What is the thermal resistance specification for the P6SMB51AH?
The P6SMB51AH has a junction-to-case thermal resistance (RθJC) of 10 °C/W and junction-to-ambient (RθJA) of 55 °C/W. These values assume standard PCB copper area per JEDEC 51-3; actual RθJA improves significantly with added thermal pads or internal copper planes, supporting sustained operation up to +150 °C junction temperature.
P6SMB51AH 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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.9A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
P6SMB51AH FAQ
1.How can I place an order for P6SMB51AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51AH 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 P6SMB51AH reliable?
The price and inventory of P6SMB51AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51AH is usually 5 days.
3.What payment methods are accepted for P6SMB51AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51AH?
P6SMB51AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51AH 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 P6SMB51AH?
For technical support, including P6SMB51AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51AH requirements.
6.How does Aetrix verify that P6SMB51AH is sourced from the original manufacturer or authorized distributors?
All P6SMB51AH 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 P6SMB51AH meets industry standards.
7.What is the process for return or replacement of P6SMB51AH?
All P6SMB51AH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51AH, 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 P6SMB51AH part is unused and in its original packaging.
Return procedure for P6SMB51AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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