My Inquiry
My Account
Taiwan Semiconductor Corporation P6SMB51H
- Part No.:
- P6SMB51H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51H.pdf
- Description:
- 600W, 51V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,179
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB51H from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 45.9V–56.1V breakdown voltage (VBR), 41.3V stand-off voltage (VWM), and 73.5V clamping voltage (VC) at 8.5A peak pulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and signal lines.
For engineers reviewing the P6SMB51H datasheet, P6SMB51H pinout, P6SMB51H application, or P6SMB51H equivalent, this device delivers AEC-Q101 qualification, <1 μA reverse leakage at VWM, sub-1 ps response time, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and robust 150°C junction operation - critical for high-reliability automotive and industrial power interface design.
Technical Context
The P6SMB51H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient suppression with low capacitance and stable VBR temperature coefficient (0.102%/°C). Its 10/1000μs waveform rating supports 600W non-repetitive peak pulse power dissipation.
Designed for surface-mount assembly, it features matte tin-plated leads compliant with J-STD-002, meets JESD 201 Class 2 whisker resistance, and carries moisture sensitivity level 1 per J-STD-020 - enabling direct integration into automated PCB production without baking or special handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 45.9 V / 56.1 V - defines reliable avalanche initiation range under 1 mA test current; ensures consistent clamping across production lot and temperature |
| VWM | 41.3 V - maximum continuous reverse operating voltage before significant leakage; sets safe DC rail margin for 48V automotive systems |
| VC @ IPPM | 73.5 V at 8.5 A - peak clamped voltage during 10/1000μs surge; limits downstream IC stress during load dump or EFT events |
| PPPSM | 600 W - non-repetitive peak pulse power rating; enables single-event suppression of high-energy transients without failure |
| IR @ VWM | <1 μA - ultra-low reverse leakage at stand-off voltage; prevents standby power loss and signal integrity degradation |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments and sealed industrial enclosures |
| Package | DO-214AA (SMB) - standardized surface-mount outline with 4.57 mm × 3.94 mm footprint and 2.29 mm height; compatible with IPC-7351B SMB land patterns |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; two-terminal unidirectional configuration; matte tin-plated leads; weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node; conducts during forward surge (e.g., reverse battery protection) |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 48V rail); enters breakdown when reverse voltage exceeds VBR, shunting surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and high-humidity conditions |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) immunity standards |
| Low-profile SMB package | Enables high-density PCB layout in space-constrained modules such as ADAS ECUs and body control units |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for green manufacturing and export compliance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 48V battery-fed ECUs in start-stop and mild-hybrid vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery rail and DC-DC input stage. Use Value: Limits voltage excursion to ≤73.5 V during 12V/48V load dump events, preventing damage to buck controller ICs rated for 80V absolute max. | Use Scenario: Protecting analog sensor inputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation PLCs. IC Role / Device Role / Timing Role: Front-end transient suppressor on twisted-pair or shielded signal lines entering ADC front-end circuitry. Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) within <1 ps, holding signal line voltage below 75 V to preserve 24-bit SAR ADC reference integrity. |
| LED Driver Overvoltage Protection | Telecom DC Power Input Protection |
Use Scenario: Safeguarding constant-current LED drivers against inductive kickback from relay-controlled lighting circuits. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output terminals to absorb flyback energy. Use Value: Absorbs 600W peak pulse energy without degradation, maintaining LED string continuity during 100 ms relay switching cycles. | Use Scenario: Guarding -48V telecom rectifier outputs against lightning-induced surges on central office distribution lines. IC Role / Device Role / Timing Role: Primary-level surge protector mounted at board edge before DC-DC isolation stage. Use Value: Withstands 10/1000μs surges up to 8.5A while limiting voltage to 73.5V, ensuring downstream SiC MOSFET gate drivers remain within safe SOA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A | Same DO-214AC (SMA) package; 51V VBR min/max = 45.9V/56.1V; 400W PPPSM; higher RθJA (75°C/W vs. 55°C/W) | Limited to lower-power 24V systems due to reduced surge rating; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and thermal performance needs |
| 1.5SMC51A | DO-214AB (SMC) package; same 51V rating; 1500W PPPSM; larger footprint (7.11 mm × 6.22 mm) | Better suited for high-energy industrial mains input stages; incompatible with SMB land patterns | Choose when board space allows and >600W surge margin is required for harsh AC-coupled environments |
Compared with SMAJ51A and 1.5SMC51A, the P6SMB51H uniquely balances AEC-Q101 compliance, SMB footprint compatibility, 600W surge capability, and 55°C/W thermal resistance - making it optimal for space-constrained, thermally demanding automotive and industrial 48V platforms.
Availability
P6SMB51H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver overvoltage suppression, and telecom DC input surge mitigation requiring stable component supply across extended temperature and lifecycle demands.
Supply support for P6SMB51H 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - with global production facilities and AEC-Q101 validation labs.
The P6SMB series belongs to TSC's automotive-grade transient suppression product line, engineered specifically for ISO 7637-2-compliant protection in 12V/24V/48V vehicle electrical architectures and industrial power interfaces.
FAQ
What is the breakdown voltage range of the P6SMB51H?
The P6SMB51H has a guaranteed breakdown voltage (VBR) range of 45.9 V to 56.1 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This range reflects process variation and ensures reliable avalanche onset across all units, supporting robust design margins in 48V automotive and industrial power systems where precise clamping threshold is critical.
Is the P6SMB51H suitable for bidirectional transient protection?
No, the P6SMB51H is a unidirectional TVS diode intended for DC rail protection with defined anode/cathode polarity. For bidirectional applications such as AC signal lines or USB data lanes, use the P6SMB51AH variant (marked MGJ), which provides symmetrical clamping in both directions and shares identical VBR, VC, and PPPSM ratings.
Does the P6SMB51H meet automotive qualification standards?
Yes, the P6SMB51H is AEC-Q101 qualified and tested per the full stress test schedule including temperature cycling, high-temperature operating life, and mechanical shock. It also complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms - confirming suitability for under-hood and chassis-mounted automotive electronic control units.
What is the maximum clamping voltage of the P6SMB51H during a surge event?
The P6SMB51H clamps to a maximum of 73.5 V at 8.5 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, enabling accurate worst-case analysis of downstream component voltage stress in designs protecting 48V-rated ICs and MOSFETs.
Can the P6SMB51H be used in lead-free reflow processes?
Yes, the P6SMB51H features matte tin-plated leads qualified per J-STD-002 for solderability and is rated for moisture sensitivity level 1 (MSL-1), meaning it can be subjected to unlimited floor life and standard Pb-free reflow profiles (peak 260°C) without preconditioning or baking - simplifying SMT line integration.
P6SMB51H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB51H FAQ
1.How can I place an order for P6SMB51H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51H 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 P6SMB51H reliable?
The price and inventory of P6SMB51H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51H is usually 5 days.
3.What payment methods are accepted for P6SMB51H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51H?
P6SMB51H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51H 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 P6SMB51H?
For technical support, including P6SMB51H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51H requirements.
6.How does Aetrix verify that P6SMB51H is sourced from the original manufacturer or authorized distributors?
All P6SMB51H 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 P6SMB51H meets industry standards.
7.What is the process for return or replacement of P6SMB51H?
All P6SMB51H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51H, 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 P6SMB51H part is unused and in its original packaging.
Return procedure for P6SMB51H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51H 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
