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Vishay General Semiconductor - Diodes Division P6SMB51AHM3/H
- Part No.:
- P6SMB51AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51AHM3/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,008
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Product details
Overview
P6SMB51AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 51 V breakdown voltage (VBR = 48.5–53.6 V at IT = 1.0 mA), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform). It protects sensitive ICs and MOSFETs against inductive switching transients and ESD in automotive and industrial power rails.
For engineers reviewing the P6SMB51AHM3/H datasheet, P6SMB51AHM3/H pinout, P6SMB51AHM3/H application, or P6SMB51AHM3/H equivalent, this device delivers AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive surge conditions - critical for automotive body control modules and industrial sensor interface protection.
Technical Context
The P6SMB51AHM3/H operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-nanosecond response to voltage transients. Its 70.1 V clamping voltage at 8.6 A ensures robust overvoltage protection for 48 V nominal systems while maintaining low incremental surge resistance and stable thermal derating up to 150 °C junction temperature.
Designed for surface-mount assembly on 0.2" × 0.2" copper pads, it supports automated placement and meets JESD201 Class 2 whisker resistance. The cathode band marking identifies polarity, and its DO-214AA outline enables compatibility with standard SMB footprint layouts without rework.
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 initiation threshold for reliable overvoltage triggering |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA, suitable for 36–48 V rail protection |
| VC @ IPPM | 70.1 V at 8.6 A - clamping voltage limits downstream component stress during 600 W transient events |
| PPPM | 600 W (10/1000 μs waveform) - sustains high-energy surges common in automotive load-dump and inductive switch-off |
| IFSM | 100 A (8.3 ms half-sine) - handles single-event surge currents without bond-wire failure |
| TJ max | 150 °C - enables operation in under-hood automotive environments and sealed industrial enclosures |
| Package | SMB (DO-214AA) - standardized 2-pin SMD footprint with 5.59 mm × 4.06 mm outline and 2.20 mm height |
Pinout & Package
SMB (DO-214AA) package: surface-mount, 2-terminal, cathode-band marked unidirectional configuration. Dimensions: 5.59 mm × 4.06 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms current sink during transient clamp |
| Cathode | High-side protected node | Connected to protected line (e.g., 48 V supply rail); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power domains |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking |
| 600 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a load-dump surges in 12 V/48 V vehicle architectures |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping, reducing risk of downstream logic upset or latch-up |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power pins from load-dump transients during battery disconnect/reconnect in BCM power distribution. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V supply rail and ground, clamping within 1 ns to limit voltage to ≤70.1 V. Use Value: Prevents permanent damage to 5 V LDO regulators and 3.3 V MCU I/O cells during 100 V/100 ms load-dump events per ISO 16750-2. |
Use Scenario: Shields 24 V digital input channels of programmable logic controllers from field-wiring induced surges and ESD during maintenance. IC Role / Device Role / Timing Role: Standoff-rated at 43.6 V, it remains non-conductive during normal operation but clamps <100 ns after surge onset. Use Value: Enables >100,000 surge cycles without degradation, meeting IEC 61000-4-5 Level 3 (2 kV/12 Ω) immunity requirements. |
| Telecom Power Supply Front-End | Motor Drive Gate Driver Protection |
|
Use Scenario: Guards DC-DC converter inputs in telecom base station power supplies against lightning-induced surges on -48 V backplane rails. IC Role / Device Role / Timing Role: Positioned upstream of primary FETs and PWM controllers to absorb energy before it reaches regulation circuitry. Use Value: 600 W rating handles 10/1000 μs transients exceeding 1 kV, preserving converter efficiency and MTBF. |
Use Scenario: Safeguards isolated gate drivers in BLDC motor inverters from shoot-through-inducing voltage spikes during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Mounted across driver VDD-GND pins to clamp ringing above 43.6 V while allowing normal 15 V operation. Use Value: Low VC/VBR ratio prevents false triggering of under-voltage lockout while suppressing >100 V spikes. |
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), lower PPPM = 400 W, SMA package (smaller footprint, higher RθJA = 130 °C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a without parallel staging | Select when board space is constrained and surge energy is ≤400 W; verify thermal margin at 100 °C ambient |
| 1.5SMC51A | Same electrical specs, but SMC (DO-214AB) package - larger (7.11 mm × 6.22 mm), higher IPPM = 9.9 A, RθJA = 65 °C/W | Better thermal handling for high-duty-cycle surges; requires PCB pad redesign | Choose for industrial motor drives needing sustained 600 W dissipation; confirm layout compatibility with SMC land pattern |
Compared with SMAJ51A-E3/5B and 1.5SMC51A, the P6SMB51AHM3/H uniquely balances AEC-Q101 qualification, halogen-free compliance, SMB footprint compactness, and full 600 W capability - making it optimal for space-constrained automotive modules where reliability and regulatory alignment are non-negotiable.
Availability
P6SMB51AHM3/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and telecom power front-end designs requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for P6SMB51AHM3/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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems, delivering standardized 600 W surge capability across a wide voltage range in compact SMB packaging.
FAQ
What is the clamping voltage of P6SMB51AHM3/H at its rated peak pulse current?
The P6SMB51AHM3/H 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 Figure 1 in Vishay Document 88370 and ensures predictable voltage limiting during surge events. The P6SMB51AHM3/H maintains this clamping performance across its specified operating temperature range of -65 °C to +150 °C.
Is P6SMB51AHM3/H qualified for automotive applications?
Yes, P6SMB51AHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in the Vishay P6SMB datasheet revision 09-Jan-2024. It meets stress test requirements for temperature cycling, humidity bias, mechanical shock, and surge endurance required for automotive powertrain and body electronics. The P6SMB51AHM3/H is specifically intended for use in modules subject to ISO 16750-2 and ISO 7637-2 environmental stress testing.
What does the "HM3" suffix signify in P6SMB51AHM3/H?
The "HM3" suffix in P6SMB51AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information table, HM3 indicates compliance with JEDEC J-STD-020 MSL Level 1, JESD201 Class 2 whisker resistance, and material categorization per Doc. 99912. The "H" denotes 7" tape-and-reel packaging (750 units per reel), and the "/H" ending confirms that configuration. The P6SMB51AHM3/H is not a commercial-grade variant - it is fully automotive-qualified.
Can P6SMB51AHM3/H be used in bidirectional configurations?
No, P6SMB51AHM3/H is a unidirectional TVS diode, as confirmed by its part number structure (no "C" suffix) and the "UNI" column in the Electrical Characteristics table. Bidirectional variants use the "CA" suffix (e.g., P6SMB51CA). Using P6SMB51AHM3/H in a bidirectional signal line would result in forward conduction during negative transients, causing failure. For bidirectional protection, select P6SMB51CHM3/H instead - the P6SMB51AHM3/H must only be applied in DC-biased or strictly unidirectional circuits.
What is the maximum steady-state power dissipation for P6SMB51AHM3/H?
The P6SMB51AHM3/H has a maximum steady-state power dissipation (PD) of 5.0 W at TA = 50 °C on an infinite heatsink, per the Maximum Ratings table. At 25 °C ambient, derating applies per Figure 2: PD drops to ~4.2 W. This rating governs continuous leakage and bias current handling - not transient suppression. The P6SMB51AHM3/H is not intended for continuous power regulation; its 5.0 W rating supports safe operation during brief overvoltage conditions prior to clamping activation.
P6SMB51AHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for P6SMB51AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51AHM3/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/H reliable?
The price and inventory of P6SMB51AHM3/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/H is usually 5 days.
3.What payment methods are accepted for P6SMB51AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51AHM3/H?
P6SMB51AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51AHM3/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/H?
For technical support, including P6SMB51AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51AHM3/H requirements.
6.How does Aetrix verify that P6SMB51AHM3/H is sourced from the original manufacturer or authorized distributors?
All P6SMB51AHM3/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/H meets industry standards.
7.What is the process for return or replacement of P6SMB51AHM3/H?
All P6SMB51AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51AHM3/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/H part is unused and in its original packaging.
Return procedure for P6SMB51AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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