My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA51AHE3_A/H
- Part No.:
- P4SMA51AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51AHE3_A/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,825
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA51AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) 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 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 power supplies.
For engineers reviewing the P4SMA51AHE3_A/H datasheet, P4SMA51AHE3_A/H pinout, P4SMA51AHE3_A/H application, or P4SMA51AHE3_A/H equivalent, this AEC-Q101 qualified TVS offers validated surge immunity for 12 V/24 V board-level protection, low incremental surge resistance, fast response time, and RoHS-compliant matte tin-plated leads compatible with J-STD-002 soldering standards.
Technical Context
The P4SMA51AHE3_A/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (VBR = 48.5–53.6 V), then clamping transient energy to ≤70.1 V at 5.7 A. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and robust surge handling up to 400 W (derated to 300 W above 91 V).
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation up to TJ = +150 °C. The cathode-band-marked SMA package supports automated placement and meets MSL Level 1 (260 °C peak reflow), UL 94 V-0 flammability, and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin below system rail (e.g., 48 V nominal bus) |
| VBR @ IT = 1 mA | 48.5–53.6 V - Verified avalanche onset range; ensures predictable turn-on during ESD or load-dump events |
| VC @ IPPM = 5.7 A | 70.1 V - Clamped voltage under 10/1000 µs surge; defines maximum stress imposed on downstream ICs |
| PPPM | 400 W - Peak pulse power handling capability; supports automotive ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); enables robustness against inrush or fault currents |
| TJ max. | +150 °C - Maximum junction temperature; allows operation in under-hood or industrial enclosures without derating |
| Leakage @ VWM | <1.0 µA - Ultra-low reverse leakage preserves battery life and avoids false triggering in low-power sensor circuits |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode-band marked, 0.208" × 0.157" footprint (5.28 mm × 3.99 mm), matte tin-plated leads, UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential node (e.g., ground or return path); defines polarity-sensitive clamping direction |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., 12 V rail); conducts transient current to ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47 - suitable for engine control, ADAS, and body electronics |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage over lifetime; eliminates risk of moisture-induced parameter drift in humid environments |
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) without degradation - no need for series impedance buffering |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without popcorn cracking or delamination - compatible with standard SMT lines |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving protection margin for 3.3 V/5 V logic interfaces |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in vehicle ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping surges before they reach regulator ICs. Use Value: Limits clamped voltage to 70.1 V, well below typical 80 V input rating of automotive DC-DC converters, preventing latch-up or overvoltage damage. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O (CAN, LIN) of industrial sensors exposed to field wiring transients. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting induced surges from long cables directly to chassis ground. Use Value: Sub-µA leakage at 43.6 V VWM avoids loading precision current loops; fast response prevents microsecond-scale overvoltage from reaching ADC front-ends. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters after rectification, guarding against transformer flyback spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS across bulk capacitor terminals, absorbing repetitive switching surges from SMPS operation. Use Value: 3.3 W steady-state power dissipation (PD) supports continuous thermal management without heatsinking in compact adapter PCBs. |
Use Scenario: Front-end protection of Ethernet PHYs and PoE injectors against lightning-induced surges on twisted-pair lines (IEC 61000-4-5). IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on differential pairs, referenced to local ground plane with controlled trace impedance. Use Value: 70.1 V clamping voltage aligns with IEEE 802.3af/at voltage limits, preserving link integrity while meeting Telcordia GR-1089-CORE Level 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A-E3/52 (Vishay) | Same VWM/VBR/VC, but SMB (DO-214AA) package - 20 % larger footprint, higher PPPM = 600 W | Better suited for higher-energy surges where board space permits; not drop-in due to different pad layout and thermal mass | Select when surge energy exceeds 400 W or when higher thermal inertia improves reliability in high-ambient-temperature zones |
| 1.5SMC51A (ON Semiconductor) | Identical electrical specs (VWM = 43.6 V, VC = 70.1 V), same SMA package, but not AEC-Q101 qualified | Limited to commercial/industrial use; lacks automotive qualification testing (e.g., HTGB, temperature cycling) | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated, with identical layout and solder profile |
Compared with SMBJ51A-E3/52 and 1.5SMC51A, the P4SMA51AHE3_A/H uniquely combines AEC-Q101 qualification, SMA footprint compatibility, and verified 400 W surge handling - making it the preferred choice for space-constrained automotive modules requiring production-grade reliability without redesign.
Availability
P4SMA51AHE3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA51AHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA51AHE3_A/H belongs to Vishay's TRANSZORB® TVS family, engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and communications systems where failure modes must be mitigated without compromising size or thermal performance.
FAQ
What is the maximum clamping voltage of the P4SMA51AHE3_A/H under a 10/1000 µs surge?
The P4SMA51AHE3_A/H has a maximum clamping voltage (VC) of 70.1 V at 5.7 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Document Number: 88367) and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA51AHE3_A/H maintains this clamping performance across its rated operating temperature range.
Is the P4SMA51AHE3_A/H qualified for automotive applications?
Yes, the P4SMA51AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and revision notes in Document 88367. It undergoes stress testing including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock per AEC-Q101 Rev D. This makes the P4SMA51AHE3_A/H suitable for under-hood and body-control module applications where automotive-grade reliability is mandatory.
What does the "HE3" suffix in P4SMA51AHE3_A/H indicate?
The "HE3" suffix in P4SMA51AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification, per Vishay's mechanical data section. The "H" indicates the tape-and-reel packaging option (1800 units per 7" reel), while "_A/H" specifies revision level "A" and packaging variant "H". This distinguishes it from commercial-grade "E3" or halogen-free "HM3" variants, confirming its automotive suitability and compliance status.
Can the P4SMA51AHE3_A/H replace the P4SMA51A-E3/61 in an existing design?
Yes, the P4SMA51AHE3_A/H is a direct functional and mechanical replacement for P4SMA51A-E3/61, sharing identical electrical specifications (VWM, VBR, VC, PPPM), SMA (DO-214AC) package dimensions, and soldering profile. The key upgrade is AEC-Q101 qualification - no PCB layout or schematic changes are required when migrating from P4SMA51A-E3/61 to P4SMA51AHE3_A/H for automotive programs.
What is the thermal resistance junction-to-ambient for the P4SMA51AHE3_A/H?
The P4SMA51AHE3_A/H has a typical thermal resistance junction-to-ambient (RθJA) of 120 °C/W when mounted on the minimum recommended copper pad layout (0.2" × 0.2" per terminal). This value is specified in the Thermal Characteristics table of Vishay Document 88367 and is critical for calculating junction temperature rise under steady-state power dissipation (PD = 3.3 W) or repetitive surge conditions.
P4SMA51AHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA51AHE3_A/H FAQ
1.How can I place an order for P4SMA51AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51AHE3_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 P4SMA51AHE3_A/H reliable?
The price and inventory of P4SMA51AHE3_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 P4SMA51AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA51AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51AHE3_A/H?
P4SMA51AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51AHE3_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 P4SMA51AHE3_A/H?
For technical support, including P4SMA51AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA51AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA51AHE3_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 P4SMA51AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA51AHE3_A/H?
All P4SMA51AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51AHE3_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 P4SMA51AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA51AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51AHE3_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
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 …
