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Vishay General Semiconductor - Diodes Division P6SMB51AHM3_A/I
- Part No.:
- P6SMB51AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51AHM3_A/I.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,901
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Product details
Overview
P6SMB51AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at IT = 1.0 mA), 43.6 V stand-off voltage (VWM), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial electronics.
For engineers reviewing the P6SMB51AHM3_A/I datasheet, P6SMB51AHM3_A/I pinout, P6SMB51AHM3_A/I application, or P6SMB51AHM3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and thermal resistance (RθJA = 100 °C/W) for PCB-level surge protection design.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold, diverting transient energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), while the low incremental surge resistance enables effective suppression of high-current spikes induced by inductive switching or ESD events.
The P6SMB51AHM3_A/I is rated for 100 A non-repetitive forward surge current (IFSM) and supports continuous operation up to TJ = 150 °C. Its SMB package provides mechanical robustness and compatibility with automated SMT assembly, meeting J-STD-002 solderability and JESD22-B102 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1.0 mA test current - defines precise avalanche onset range for reliable overvoltage triggering |
| VWM | 43.6 V - maximum steady-state reverse voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | 70.1 V at 8.6 A - clamped voltage during 10/1000 µs transient; determines protected circuit's maximum stress level |
| PPPM | 600 W - peak pulse power handling capacity; defines survivability against standardized lightning/surge waveforms |
| IFSM | 100 A - single half-sine surge rating (8.3 ms); validates robustness against motor-switching or transformer inrush events |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient; informs minimum copper pad area (0.2" × 0.2") required for thermal reliability |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by band marking on one end; anode is unmarked end. Meets UL 94 V-0 flammability rating and MSL Level 1 per J-STD-020 (peak reflow ≤ 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or lower-potential rail; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress requirements |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for EU, China, and global OEM supply chains without compromising surge performance |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted on 5 mm × 5 mm copper pads |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) across temperature and lifetime |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile usage without baking preconditioning |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power input and ground, acting as first-line transient shunt. Use Value: Limits voltage to ≤70.1 V during 100 A/100 ms pulses, preventing damage to downstream DC/DC converters and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable-induced noise in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential signal pairs, suppressing sub-100 ns transients without distorting signal integrity. Use Value: Maintains <1 µA leakage at 43.6 V, ensuring minimal offset error in precision 4–20 mA loops and 0–10 V analog channels. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controllers against AC line surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Standoff-rated TVS placed across bridge rectifier output, clamping positive-going transients before bulk capacitor. Use Value: Withstands repetitive 600 W pulses at 0.01% duty cycle, enabling long-term reliability in wall-wart and USB-C PD adapters. |
Use Scenario: Protecting Ethernet PHYs and DSL line drivers from lightning-induced surges on outdoor-facing telecom ports. IC Role / Device Role / Timing Role: Unidirectional TVS on DC bias rails feeding PoE injectors or xDSL line drivers. Use Value: Delivers 70.1 V clamping at 8.6 A, compatible with GR-1089-CORE Level 3 surge immunity requirements for central office equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/5B | Same VBR range (48.5–53.6 V), but SMA package (DO-214AC); RθJA = 120 °C/W vs. 100 °C/W | Lower power density; less suitable for high-temperature automotive under-hood mounting | Select when footprint constraints favor smaller SMA or legacy board designs require DO-214AC compatibility |
| 1.5SMC51A | Same electrical specs but SMC (DO-214AB) package; higher IPPM (9.2 A) and VC (73.5 V); RθJA = 85 °C/W | Better thermal performance but larger footprint; not AEC-Q101 qualified | Choose for industrial mains-input protection where AEC-Q101 is unnecessary and higher surge margin is prioritized |
Compared with SMAJ51A-E3/5B and 1.5SMC51A, the P6SMB51AHM3_A/I offers optimal balance of automotive qualification, thermal efficiency in SMB form factor, and halogen-free compliance - making it preferred for new automotive and high-reliability industrial designs requiring MSL Level 1 and JESD22-B102 whisker resistance.
Availability
P6SMB51AHM3_A/I is available at Aetrix Electronics and suitable for automotive control units, industrial sensor nodes, consumer power adapters, and telecom line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB51AHM3_A/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-energy transient suppression in space-constrained, high-volume applications - engineered for automotive, industrial, and consumer electronics where AEC-Q101 qualification, halogen-free compliance, and consistent clamping performance are mandatory.
FAQ
What is the exact breakdown voltage range for P6SMB51AHM3_A/I?
The P6SMB51AHM3_A/I has a guaranteed breakdown voltage (VBR) range of 48.5 V to 53.6 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35. This tight tolerance ensures predictable clamping behavior across manufacturing lots and temperature extremes, critical for protecting sensitive 5 V or 3.3 V logic rails interfaced through level-shifting circuits. The P6SMB51AHM3_A/I maintains this specification under full AEC-Q101 qualification testing.
Is P6SMB51AHM3_A/I suitable for automotive applications?
Yes, P6SMB51AHM3_A/I is AEC-Q101 qualified (denoted by HM3 suffix), meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD per automotive reliability standards. Its halogen-free, RoHS-compliant construction and MSL Level 1 rating further support use in engine control modules, body electronics, and ADAS sensors where long-term field reliability is essential. The P6SMB51AHM3_A/I is explicitly listed in Vishay's automotive-grade ordering matrix.
What is the maximum clamping voltage of P6SMB51AHM3_A/I under surge conditions?
The P6SMB51AHM3_A/I exhibits a maximum clamping voltage (VC) of 70.1 V at its rated peak pulse current (IPPM) of 8.6 A, tested with a 10/1000 µs waveform. This value defines the highest voltage seen by downstream components during worst-case transients and must be compared against the absolute maximum ratings of protected ICs. The P6SMB51AHM3_A/I achieves this performance with low incremental surge resistance, minimizing voltage overshoot beyond VC.
Does P6SMB51AHM3_A/I have polarity markings, and how is it oriented on PCB?
Yes, P6SMB51AHM3_A/I is unidirectional and marked with a cathode band on one end - this band must be connected toward the side of the circuit being protected (e.g., power rail), while the anode (unmarked end) connects to ground or reference potential. Incorrect orientation prevents clamping action and may cause catastrophic failure during overvoltage events. The P6SMB51AHM3_A/I's polarity is confirmed in Vishay's mechanical drawings and ordering information tables.
What thermal derating applies to P6SMB51AHM3_A/I at elevated ambient temperatures?
The P6SMB51AHM3_A/I follows Vishay's standard derating curve (Fig. 2): its peak pulse power capability decreases linearly above 25 °C ambient, reaching ~50% of 600 W at TA = 100 °C. This reflects junction-to-ambient thermal resistance (RθJA = 100 °C/W) and requires adherence to the recommended 0.2" × 0.2" copper pad layout for accurate thermal modeling. The P6SMB51AHM3_A/I's 150 °C maximum junction temperature allows operation in harsh environments when board layout complies with datasheet guidelines.
P6SMB51AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 8.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB51AHM3_A/I FAQ
1.How can I place an order for P6SMB51AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51AHM3_A/I 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 P6SMB51AHM3_A/I reliable?
The price and inventory of P6SMB51AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB51AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51AHM3_A/I?
P6SMB51AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51AHM3_A/I 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 P6SMB51AHM3_A/I?
For technical support, including P6SMB51AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51AHM3_A/I requirements.
6.How does Aetrix verify that P6SMB51AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB51AHM3_A/I 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 P6SMB51AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB51AHM3_A/I?
All P6SMB51AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51AHM3_A/I, 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 P6SMB51AHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB51AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51AHM3_A/I Tags
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