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Vishay General Semiconductor - Diodes Division P6SMB51AHE3_B/I
- Part No.:
- P6SMB51AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51AHE3_B/I.pdf
- Description:
- 600W,51V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,904
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Product details
Overview
P6SMB51AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 43.6 V standoff voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) 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 automotive and industrial power supplies.
For engineers reviewing the P6SMB51AHE3_B/I datasheet, P6SMB51AHE3_B/I pinout, P6SMB51AHE3_B/I application, or P6SMB51AHE3_B/I equivalent, this AEC-Q101 qualified TVS offers verified transient suppression performance, RoHS-compliant matte tin-plated leads, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive ECUs and industrial control modules requiring stable surge immunity without layout redesign.
Technical Context
This unidirectional TVS operates by avalanche breakdown when reverse voltage exceeds VBR, limiting transient energy via low incremental surge resistance and fast sub-nanosecond response. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable clamping behavior across temperature (-65 °C to +150 °C).
The device is rated for 600 W peak pulse power under 10/1000 μs waveform with 0.01% duty cycle, derated above 25 °C per thermal curve Fig. 2, and supports 100 A non-repetitive forward surge (8.3 ms half-sine) - enabling robust protection of DC input rails and I/O lines against ESD, load dump, and inductive switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 43.6 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected circuitry. |
| VBR (Breakdown) | 48.5–53.6 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on during transients without premature conduction. |
| VC (Clamping) | 70.1 V at 8.6 A - Maximum voltage seen by downstream components during 10/1000 μs surge; determines required voltage headroom. |
| PPPM | 600 W - Peak transient energy absorption capability; sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges. |
| IPPM | 8.6 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify thermal margin under surge. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and enclosed industrial enclosures. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for repetitive surge duty. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / Surge return path | Connected to ground or low-impedance return plane; carries full transient current during clamping. |
| Cathode | Protected line connection / Clamping node | Connected to line being protected (e.g., 48 V rail); voltage referenced to anode during avalanche conduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors - meets stress test requirements for temperature cycling, HTRB, and ESD. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 μA) over lifetime and temperature, critical for low-power always-on circuits. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak 260 °C without baking - simplifies SMT assembly in high-volume automotive manufacturing. |
| 600 W 10/1000 μs rating | Provides margin against ISO 7637-2 load dump (Pulse 5a) and IEC 61000-4-5 surges up to 2 kV/12 Ω without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on protected ICs - e.g., keeps 5 V logic inputs below 7 V during 8.6 A surge, preserving reliability. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping surges within 1 ns to limit voltage to ≤70.1 V. Use Value: Prevents damage to buck controller ICs and gate drivers by absorbing up to 600 W of transient energy without latch-up or parametric shift. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in PLC I/O modules from field-wiring induced surges. IC Role / Device Role / Timing Role: TVS connected from sensor output line to ground, suppressing fast-rising EFT bursts (IEC 61000-4-4) and cable discharge events. Use Value: Maintains signal integrity below 10 mV error band by limiting clamped voltage to 70.1 V while adding <0.5 pF capacitance at 0 V bias. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding PoE-powered switches and base stations against lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary TVS on DC input stage, coordinated with upstream fuse and secondary filtering to meet IEC 61000-4-5 Level 4. Use Value: Withstands ≥100 surges at 600 W without parameter drift, ensuring long-term uptime in outdoor telecom cabinets. |
Use Scenario: Adding secondary-level surge protection to USB-C power delivery paths in smart home hubs and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line, triggered only during overvoltage faults while remaining transparent during normal 5–20 V PD negotiation. Use Value: Enables compliance with UL 62368-1 Annex G surge testing using compact SMB footprint - no redesign needed for existing USB-C layouts. |
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 VWM (43.6 V), VC = 87.1 V at 6.9 A; lower PPPM (400 W); SMA package (DO-214AC), smaller footprint but higher RθJA (140 °C/W). | Lower surge capacity limits use to consumer-grade 12 V systems; not AEC-Q101 qualified - unsuitable for automotive under-hood placement. | Select when space is constrained and surge severity is limited to IEC 61000-4-5 Level 2; verify thermal margin due to higher junction temp rise. |
| 1.5SMC51A | Same VWM/VBR/VC specs; higher PPPM (1500 W); larger SMC (DO-214AB) package; non-AEC-Q101; lead-free but not halogen-free option. | Higher power rating supports repeated load dump events in commercial vehicle alternators; bulkier package requires PCB area increase. | Choose for heavy-duty industrial power supplies needing >1000 W surge handling; confirm board space and assembly compatibility with SMC footprint. |
Compared with SMAJ51A-E3/5B, P6SMB51AHE3_B/I delivers 50% higher surge power and automotive qualification in the same SMB footprint; versus 1.5SMC51A, it trades 2.5× peak power for 40% smaller board area and guaranteed AEC-Q101 compliance - ideal for space-constrained, safety-critical ECUs.
Availability
P6SMB51AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply with AEC-Q101 validation and RoHS/halogen-free compliance.
Supply support for P6SMB51AHE3_B/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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The P6SMB Series was developed specifically for high-energy transient suppression in harsh-environment applications - targeting automotive power distribution, industrial automation, and infrastructure equipment where consistent clamping performance and long-term stability are mandatory.
FAQ
What is the clamping voltage of P6SMB51AHE3_B/I at its rated peak pulse current?
The P6SMB51AHE3_B/I has a maximum clamping voltage (VC) of 70.1 V at 8.6 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC standards and confirmed in the Vishay datasheet revision 09-Jan-2024, Document Number 88370. The clamping voltage defines the upper voltage limit imposed on protected circuitry during surge events, making it critical for validating IC overvoltage margins. P6SMB51AHE3_B/I maintains this specification across its full operating temperature range (-65 °C to +150 °C).
Is P6SMB51AHE3_B/I qualified for automotive applications?
Yes, P6SMB51AHE3_B/I is AEC-Q101 qualified, as indicated by the "HE3" suffix and "_B" revision code in its ordering designation. It has passed all stress tests defined in the AEC-Q101 standard, including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD). This qualification makes P6SMB51AHE3_B/I suitable for use in automotive powertrain, chassis, and body electronics where reliability under thermal and electrical stress is mandatory. The device is rated for junction temperatures up to +150 °C, supporting under-hood deployment.
What does the "_B/I" suffix mean in P6SMB51AHE3_B/I?
The "_B" suffix in P6SMB51AHE3_B/I denotes AEC-Q101 qualification for the P6SMB51A series, while "/I" specifies packaging in 13-inch diameter plastic tape and reel with a 3200-unit quantity per reel. This format complies with EIA-481 standards and is optimized for high-speed automated pick-and-place assembly. The "HE3" portion confirms RoHS compliance and matte tin plating per J-STD-002. Together, P6SMB51AHE3_B/I identifies a fully qualified, production-ready variant of the P6SMB51A TVS diode intended for automotive and industrial SMT lines.
How does the thermal resistance of P6SMB51AHE3_B/I affect its surge handling capability?
P6SMB51AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. This value directly impacts its ability to sustain repetitive surges: at ambient temperatures above 25 °C, the device must be derated per Figure 2 in the datasheet to avoid exceeding +150 °C junction temperature. For example, at 85 °C ambient, its usable peak pulse power drops to ~420 W. Proper PCB copper area and thermal vias are essential to maintain performance in high-duty-cycle applications like industrial motor drives.
Can P6SMB51AHE3_B/I replace older P6SMB51A-E3 parts in existing designs?
Yes, P6SMB51AHE3_B/I is a direct functional and mechanical replacement for P6SMB51A-E3, sharing identical electrical specifications (VWM, VBR, VC, PPPM), SMB (DO-214AA) package dimensions, and pinout. The key enhancements are AEC-Q101 qualification, improved whisker resistance (JESD 201 Class 2), and halogen-free construction - all without requiring PCB layout changes. Designers can migrate to P6SMB51AHE3_B/I to meet updated automotive or environmental compliance requirements while retaining proven surge performance and assembly compatibility.
P6SMB51AHE3_B/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:
- 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):
- 8.6A
- 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)
P6SMB51AHE3_B/I FAQ
1.How can I place an order for P6SMB51AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51AHE3_B/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 P6SMB51AHE3_B/I reliable?
The price and inventory of P6SMB51AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51AHE3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB51AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51AHE3_B/I?
P6SMB51AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51AHE3_B/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 P6SMB51AHE3_B/I?
For technical support, including P6SMB51AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51AHE3_B/I requirements.
6.How does Aetrix verify that P6SMB51AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB51AHE3_B/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 P6SMB51AHE3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB51AHE3_B/I?
All P6SMB51AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51AHE3_B/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 P6SMB51AHE3_B/I part is unused and in its original packaging.
Return procedure for P6SMB51AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51AHE3_B/I Tags
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