My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA51AHM3_A/H
- Part No.:
- P4SMA51AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51AHM3_A/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,178
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA51AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at 1 mA), 43.6 V standoff voltage (VWM), 70.1 V maximum clamping voltage (VC) at 5.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the P4SMA51AHM3_A/H datasheet, P4SMA51AHM3_A/H pinout, P4SMA51AHM3_A/H application, or P4SMA51AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance, thermal resistance (RθJA = 120 °C/W), and junction temperature range (–65 to +150 °C).
Technical Context
This TVS diode operates as a voltage-clamping device triggered by overvoltage events exceeding its reverse standoff voltage (43.6 V). Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the low incremental surge resistance enables rapid energy diversion during 10/1000 µs transients.
The device is rated for 400 W peak pulse power (derated to 300 W above 91 V), supports 40 A non-repetitive forward surge current (8.3 ms half-sine), and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its cathode-band marking identifies polarity for unidirectional operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise clamping onset threshold under standardized test conditions |
| VWM | 43.6 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 70.1 V at 5.7 A - clamped voltage during 400 W transient, limiting downstream stress |
| IPPM | 5.7 A - peak pulse current capability with 10/1000 µs waveform, directly tied to PCB pad layout |
| PPPM | 400 W - peak transient power handling capacity, derated above 91 V to 300 W |
| TJ max | +150 °C - maximum junction temperature enabling reliable operation in under-hood automotive environments |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for thermal design on standard 0.2" × 0.2" copper pads |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., reverse-biased supply rail fault) |
| Cathode | Clamping reference terminal | Marked end; connected to higher-potential side (e.g., VCC or signal line); initiates avalanche breakdown when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JEDEC standards |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial production without compromising surge performance |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) across temperature and lifetime |
| MSL Level 1 | Supports standard SMT reflow profiles up to 260 °C peak without moisture-induced failure |
| 400 W peak pulse power | Handles high-energy transients common in 12 V/24 V automotive power nets and industrial I/O protection |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp transients before they reach LDOs and microcontrollers. Use Value: Limits clamped voltage to 70.1 V during 5.7 A surges, preventing damage to 36 V-rated input stages in power management ICs. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC modules exposed to field wiring noise. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt induced surges on 4–20 mA or 0–10 V signal lines. Use Value: Fast response time and low clamping voltage preserve signal integrity while meeting IEC 61000-4-5 Level 3 immunity requirements. |
| Consumer Device USB Port Protection | Telecom DC Power Input Protection |
Use Scenario: Adding secondary overvoltage protection on VBUS line of USB-C ports in portable monitors and docking stations. IC Role / Device Role / Timing Role: Standoff voltage (43.6 V) safely tolerates 20 V PD negotiation while clamping accidental 48 V PoE misconnections. Use Value: Prevents latch-up in USB controller ICs by limiting transient overshoot to ≤70.1 V during 10/1000 µs events. |
Use Scenario: Protecting -48 V telecom rectifier outputs from lightning-induced surges on central office distribution lines. IC Role / Device Role / Timing Role: Unidirectional TVS installed between output rail and chassis ground to absorb differential-mode transients. Use Value: 400 W rating sustains multiple surge events without degradation, supporting GR-1089-CORE compliance for network equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Same VBR range (48.5–53.6 V), but SMB package (DO-214AA) - larger footprint, lower RθJA (90 °C/W) | Higher power dissipation margin in space-constrained designs where thermal relief is limited | Select when board layout allows larger pad area and higher sustained surge duty cycle is required |
| 1.5SMC51A | Same electrical specs, but SMC (DO-214AB) package - 2.5× larger than SMA, RθJA = 60 °C/W | Used in legacy industrial power supplies where mechanical robustness and thermal mass outweigh size constraints | Choose for high-reliability 1.5 kW-class surge environments where P4SMA51AHM3_A/H's 400 W rating is marginal |
Compared with SMBJ51A and 1.5SMC51A, P4SMA51AHM3_A/H delivers identical clamping performance in the smallest surface-mount footprint (SMA), enabling dense automotive PCB layouts while maintaining AEC-Q101 qualification and halogen-free compliance - critical for next-gen ADAS domain controllers.
Availability
P4SMA51AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input protection requiring stable component supply, AEC-Q101 validation, and halogen-free manufacturing compliance.
Supply support for P4SMA51AHM3_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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-speed transient suppression in automotive, industrial, and communications systems - delivering consistent clamping performance, AEC-Q101 qualification, and compact surface-mount packaging for space- and reliability-critical designs.
FAQ
What is the polarity configuration of P4SMA51AHM3_A/H?
P4SMA51AHM3_A/H is a unidirectional transient voltage suppressor. Its cathode is marked with a band on the SMA package body; the unmarked end is the anode. This configuration allows it to conduct only during reverse-biased overvoltage events - essential for protecting positive-rail circuits like automotive 12 V systems. The device does not conduct in forward bias except during specified surge conditions.
Does P4SMA51AHM3_A/H meet automotive qualification standards?
Yes, P4SMA51AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, AEC-Q101). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification per JEDEC standards - making it suitable for engine control units, body electronics, and ADAS modules.
What is the maximum clamping voltage of P4SMA51AHM3_A/H under surge conditions?
The maximum clamping voltage (VC) of P4SMA51AHM3_A/H is 70.1 V at 5.7 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions on 0.2" × 0.2" copper pads and represents the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 36 V or 40 V rated downstream components.
How does the thermal resistance of P4SMA51AHM3_A/H affect PCB layout?
P4SMA51AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. To maintain safe junction temperatures under repetitive surges, designers must ensure adequate copper pour area and avoid excessive trace length between the device and ground plane. Reducing pad size increases RθJA, risking thermal runaway during high-duty-cycle transients.
Is P4SMA51AHM3_A/H compatible with lead-free reflow processes?
Yes, P4SMA51AHM3_A/H is rated for MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the molding compound meets UL 94 V-0 flammability rating - ensuring robust performance in standard lead-free SMT assembly lines without popcorn cracking or delamination.
P4SMA51AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, 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):
- 5.7A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
P4SMA51AHM3_A/H FAQ
1.How can I place an order for P4SMA51AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51AHM3_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 P4SMA51AHM3_A/H reliable?
The price and inventory of P4SMA51AHM3_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 P4SMA51AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA51AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51AHM3_A/H?
P4SMA51AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51AHM3_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 P4SMA51AHM3_A/H?
For technical support, including P4SMA51AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA51AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA51AHM3_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 P4SMA51AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA51AHM3_A/H?
All P4SMA51AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51AHM3_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 P4SMA51AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA51AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51AHM3_A/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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
