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Vishay General Semiconductor - Diodes Division P6SMB51AHM3_A/H
- Part No.:
- P6SMB51AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51AHM3_A/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,536
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Product details
Overview
P6SMB51AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on power and signal lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at 1 mA), 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 industrial power supplies and automotive ECUs.
For engineers reviewing the P6SMB51AHM3_A/H datasheet, P6SMB51AHM3_A/H pinout, P6SMB51AHM3_A/H application, or P6SMB51AHM3_A/H equivalent, key selection criteria include unidirectional polarity, SMB (DO-214AA) package compatibility, AEC-Q101 qualification status, 150 °C max junction temperature, and compliance with J-STD-020 MSL level 1 reflow profile.
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation with <1 µA leakage at 43.6 V stand-off voltage (VWM), then rapidly avalanches to limit transient overvoltage. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
It delivers 600 W peak pulse power under standardized 10/1000 µs waveform conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation on standard 0.2" × 0.2" copper pads without active cooling in most embedded protection applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA test current - defines precise avalanche onset range for accurate overvoltage threshold setting |
| VWM | 43.6 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 70.1 V at 8.6 A - clamped voltage seen by protected circuit during worst-case 600 W transient event |
| PPPM | 600 W - peak transient energy absorption capability per 10/1000 µs waveform, duty cycle ≤ 0.01 % |
| TJ max | +150 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.220" × 0.130" footprint and MSL level 1 moisture sensitivity |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V rail or sensor input); band-marked end identifies this pin |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24–48 V systems without derating |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and lifetime |
| MSL level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning or baking requirements |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response time) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (up to 60 V, 100 ms) on 48 V battery-fed ECUs in start-stop vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp overvoltage before it reaches downstream DC/DC converters and microcontrollers. Use Value: Prevents latch-up or permanent damage to 51 V-rated components using verified 70.1 V clamping at 8.6 A, aligned with ISO 16750-2 pulse 5a requirements. |
Use Scenario: Protecting analog inputs of industrial pressure/temperature sensors exposed to EFT bursts and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector entry point to shunt transients before signal conditioning amplifiers. Use Value: Maintains signal integrity with <1 µA leakage at 43.6 V, while clamping 4 kV ESD events to safe levels below ADC input absolute maximum ratings. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Clamping |
|
Use Scenario: Safeguarding PoE-powered equipment front-end circuits against induced lightning surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary-level TVS in series with fuse and common-mode choke to absorb differential-mode surges up to 600 W. Use Value: Meets IEC 61000-4-5 combination wave (1.2/50 µs + 8/20 µs) requirements with validated 70.1 V clamping and 150 °C operational margin. |
Use Scenario: Clamping output overvoltage in USB-C PD adapters during feedback loop failure or transient load steps. IC Role / Device Role / Timing Role: Secondary-side unidirectional TVS tied between regulated 20 V output and ground to prevent overvoltage stress on connected devices. Use Value: Provides fail-safe shutdown margin with 43.6 V stand-off and 70.1 V clamping - well below typical 28 V USB-C PD absolute maximum ratings. |
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 lower PPPM = 400 W and non-AEC-Q101 rated | Restricted to commercial-grade consumer/industrial applications; not suitable for automotive deployment | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin is unnecessary |
| 1.5SMC51A | Same electrical specs but in larger SMC (DO-214AB) package; higher RθJA = 125 °C/W | Requires more PCB area and exhibits higher thermal rise under repetitive surge conditions | Choose only if legacy SMC footprint compatibility is mandatory and thermal derating can be accommodated |
Compared with SMAJ51A-E3/5B and 1.5SMC51A, P6SMB51AHM3_A/H provides AEC-Q101 qualification, superior 600 W surge handling in compact SMB form factor, and tighter thermal performance - making it optimal for space-constrained, high-reliability automotive and industrial designs where qualification and power density are critical.
Availability
P6SMB51AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, telecom power supplies, and USB-C PD adapter designs requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for P6SMB51AHM3_A/H 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 was developed for high-energy transient suppression in automotive, industrial, and telecom systems - delivering AEC-Q101-qualified, surface-mount TVS solutions with consistent clamping performance and robust thermal design.
FAQ
What is the maximum clamping voltage of the P6SMB51AHM3_A/H under a 10/1000 µs transient?
The P6SMB51AHM3_A/H has a maximum clamping voltage (VC) of 70.1 V at 8.6 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88370 and represents the upper voltage limit imposed on protected circuitry during worst-case surge events. The P6SMB51AHM3_A/H maintains this clamping performance across its specified operating temperature range.
Is P6SMB51AHM3_A/H qualified for automotive applications?
Yes, P6SMB51AHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix and documentation in Vishay's ordering information table (page 3, note 2). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. This makes P6SMB51AHM3_A/H suitable for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is critical.
What does the "_A/H" suffix in P6SMB51AHM3_A/H indicate?
The "_A/H" suffix in P6SMB51AHM3_A/H denotes packaging and revision coding: "A" indicates the revision level of the device specification, and "H" specifies 7-inch plastic tape-and-reel delivery (750 units per reel), per Vishay's ordering information table. The "HM3" portion confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinct from commercial-grade "M3" or "E3" variants.
How does the SMB (DO-214AA) package of P6SMB51AHM3_A/H compare thermally to larger packages like SMC?
The SMB (DO-214AA) package of P6SMB51AHM3_A/H offers a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, compared to ~125 °C/W for the larger SMC (DO-214AB) package used in alternatives like 1.5SMC51A. This lower RθJA allows P6SMB51AHM3_A/H to sustain higher surge repetition rates on standard PCB layouts, especially when mounted on 0.2" × 0.2" copper pads as specified in the Vishay datasheet.
Can P6SMB51AHM3_A/H be used in bidirectional configurations?
No, P6SMB51AHM3_A/H is a unidirectional TVS diode, as indicated by the "A" suffix (not "CA") and explicit "Unidirectional" designation in the Vishay P6SMB series datasheet. Bidirectional variants use the "CA" suffix (e.g., P6SMB51CA) and exhibit symmetrical clamping in both polarities. Using P6SMB51AHM3_A/H in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
P6SMB51AHM3_A/H 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/H FAQ
1.How can I place an order for P6SMB51AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51AHM3_A/H 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/H reliable?
The price and inventory of P6SMB51AHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for P6SMB51AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51AHM3_A/H?
P6SMB51AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51AHM3_A/H 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/H?
For technical support, including P6SMB51AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51AHM3_A/H requirements.
6.How does Aetrix verify that P6SMB51AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB51AHM3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of P6SMB51AHM3_A/H?
All P6SMB51AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51AHM3_A/H, 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/H part is unused and in its original packaging.
Return procedure for P6SMB51AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51AHM3_A/H Tags
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