My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P6SMB51AHM3_B/H
- Part No.:
- P6SMB51AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51AHM3_B/H.pdf
- Description:
- 600W,51V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,137
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB51AHM3_B/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 MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial power electronics.
For engineers reviewing the P6SMB51AHM3_B/H datasheet, P6SMB51AHM3_B/H pinout, P6SMB51AHM3_B/H application, or P6SMB51AHM3_B/H equivalent, this AEC-Q101 qualified TVS offers verified unidirectional clamping performance, halogen-free RoHS compliance, and validated thermal resistance (RθJA = 100 °C/W) under standard PCB mounting conditions.
Technical Context
This device operates as a unidirectional avalanche diode with cathode-band polarity marking, designed to clamp transient overvoltages before they damage downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while its MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
The P6SMB51AHM3_B/H delivers consistent clamping behavior across -65 °C to +150 °C operating junction temperature range, with temperature coefficient of VBR at +0.102 %/°C - enabling predictable performance in thermally demanding environments such as engine control units and industrial motor drives.
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 voltage threshold where avalanche conduction begins |
| VWM | 43.6 V - maximum continuous reverse working voltage; must exceed normal circuit operating voltage to avoid leakage |
| VC @ IPPM | 70.1 V at 8.6 A - clamped voltage seen by protected circuit during 600 W transient event |
| IPPM | 8.6 A - peak surge current capability under standardized 10/1000 μs waveform |
| PPPM | 600 W - transient energy absorption capacity without failure, derated above 25 °C ambient |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; determines safe power dissipation limits |
| TJ max | +150 °C - maximum allowable junction temperature; sets upper boundary for thermal design margin |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode indicated by band on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path for clamping loop integrity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive powertrain and body electronics applications per stress test requirements |
| 600 W peak pulse power | Withstands high-energy transients common in 12 V/24 V vehicle systems and industrial PLC I/O modules |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes voltage overshoot during clamping, reducing stress on downstream silicon like microcontrollers and gate drivers |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with automated assembly processes |
| Glass-passivated junction | Ensures long-term stability of breakdown voltage and leakage current over temperature and lifetime |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Suppresses load-dump and inductive kickback transients on 12 V supply rails feeding MCU power domains. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND, clamping surges within 1 ns response time. Use Value: Prevents latch-up or permanent damage to 5 V LDO regulators and CAN transceivers during alternator regulation faults. |
Use Scenario: Protects analog input channels of PLC analog modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff voltage (43.6 V) exceeds 24 V nominal rail, allowing clean operation during normal state. Use Value: Limits transient voltage to ≤70.1 V, preserving ADC front-end op-amps and isolation barriers. |
| Telecom Power Supply Input Stage | Consumer Appliance Sensor Interface |
Use Scenario: Guards primary-side DC bus against lightning-induced surges entering via AC/DC adapter inputs. IC Role / Device Role / Timing Role: First-line protection ahead of bridge rectifier and bulk capacitor; absorbs 600 W pulses. Use Value: Eliminates need for secondary-stage MOVs or gas discharge tubes, reducing BOM count and board space. |
Use Scenario: Shields I²C or UART lines connecting temperature/humidity sensors to main controller. IC Role / Device Role / Timing Role: Low capacitance (<100 pF typical) avoids signal integrity degradation at 400 kHz bus speeds. Use Value: Maintains data integrity during ESD events up to ±15 kV contact discharge per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient 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; SMA package (DO-214AC), larger RθJA = 125 °C/W | Limited to lower-energy transients; less suitable for automotive load-dump scenarios requiring 600 W | Select when cost or legacy footprint compatibility outweighs peak power needs |
| 1.5SMC51A | Same electrical specs, but SMC (DO-214AB) package; higher thermal mass, RθJA = 85 °C/W; not AEC-Q101 qualified | Acceptable for commercial/industrial use, but lacks automotive reliability validation and halogen-free certification | Choose only for non-automotive designs where qualification and material compliance are not required |
Compared with SMAJ51A-E3/5B and 1.5SMC51A, the P6SMB51AHM3_B/H uniquely combines 600 W pulse handling, AEC-Q101 qualification, halogen-free construction, and SMB footprint - making it the optimal choice for space-constrained, high-reliability automotive and industrial transient suppression.
Availability
P6SMB51AHM3_B/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drive I/O modules, telecom power supplies, and consumer appliance sensor interfaces requiring stable component supply and full traceability.
Supply support for P6SMB51AHM3_B/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, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and telecom systems, delivering AEC-Q101 qualified, surface-mount TVS solutions optimized for automated assembly and harsh-environment operation.
FAQ
What is the maximum clamping voltage of the P6SMB51AHM3_B/H under a 10/1000 µs transient?
The P6SMB51AHM3_B/H has a maximum clamping voltage (VC) of 70.1 V when subjected to its rated peak pulse current of 8.6 A, defined by the 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88370 and represents the worst-case voltage imposed on protected circuitry during a standardized surge event. The P6SMB51AHM3_B/H maintains this clamping performance across its full operating temperature range.
Is the P6SMB51AHM3_B/H AEC-Q101 qualified, and what does the "_B/H" suffix indicate?
Yes, the P6SMB51AHM3_B/H is AEC-Q101 qualified - confirmed in the Vishay datasheet revision 09-Jan-2024, Note (1) on page 3. The "_B" denotes AEC-Q101 qualification for the 6.8 V to 220 V unidirectional/bidirectional range, and "_H" specifies 7" diameter plastic tape and reel packaging with 750 units per reel. The "HM3" portion confirms halogen-free, RoHS-compliant construction.
How does the P6SMB51AHM3_B/H differ from the P6SMB51A standard version?
The P6SMB51AHM3_B/H differs from the base P6SMB51A in three key ways: it carries the HM3 suffix indicating halogen-free and RoHS compliance; the _B suffix certifies AEC-Q101 qualification; and the /H denotes 7" tape-and-reel packaging (750 units). Electrically and thermally, the P6SMB51AHM3_B/H matches the P6SMB51A's VBR, VC, PPPM, and RθJA specifications - no performance trade-offs accompany the enhanced qualifications.
What is the standoff voltage (VWM) of the P6SMB51AHM3_B/H, and why is it critical for circuit design?
The standoff voltage (VWM) of the P6SMB51AHM3_B/H is 43.6 V - the maximum continuous reverse voltage it can block without significant leakage current (<1.0 µA). This parameter is critical because VWM must exceed the highest normal operating voltage of the protected line (e.g., 36 V for a 24 V automotive system) to prevent false triggering and ensure reliable standby operation. Exceeding VWM risks premature conduction and increased power loss.
Can the P6SMB51AHM3_B/H be used in bidirectional configurations?
No, the P6SMB51AHM3_B/H is a unidirectional TVS diode, as indicated by the "A" suffix (not "CA") and absence of bidirectional VBR/VWM ranges in its datasheet row. Bidirectional variants use the "CA" suffix (e.g., P6SMB51CA). Using the P6SMB51AHM3_B/H in a bidirectional application would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
P6SMB51AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Bulk
- 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)
P6SMB51AHM3_B/H FAQ
1.How can I place an order for P6SMB51AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51AHM3_B/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_B/H reliable?
The price and inventory of P6SMB51AHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB51AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51AHM3_B/H?
P6SMB51AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51AHM3_B/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_B/H?
For technical support, including P6SMB51AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51AHM3_B/H requirements.
6.How does Aetrix verify that P6SMB51AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB51AHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB51AHM3_B/H?
All P6SMB51AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51AHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for P6SMB51AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51AHM3_B/H 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
