My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA51CAHE3_A/I
- Part No.:
- P4SMA51CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51CAHE3_A/I.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,389
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA51CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power 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 control systems.
For engineers reviewing the P4SMA51CAHE3_A/I datasheet, P4SMA51CAHE3_A/I pinout, P4SMA51CAHE3_A/I application, or P4SMA51CAHE3_A/I equivalent, this device serves as an AEC-Q101-qualified, RoHS-compliant bidirectional TVS for robust ESD and surge protection in space-constrained PCB layouts requiring low-profile SMT placement and stable clamping performance across -65 °C to +150 °C junction temperature range.
Technical Context
The P4SMA51CAHE3_A/I operates as a symmetrical avalanche diode, conducting in both directions when transient voltage exceeds its bidirectional breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges.
Rated for 400 W peak pulse power (derated to 300 W above 91 V), it delivers 5.7 A IPPM at 70.1 V clamping under 10/1000 µs waveform while maintaining 1.0 µA max reverse leakage at VWM. Thermal resistance is 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, supporting reliable operation in high-reliability automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43.6 V - Maximum continuous working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 48.5–53.6 V at 1 mA - Symmetrical avalanche onset range; ensures predictable bidirectional conduction during transients. |
| VC (Clamping Voltage) | 70.1 V at 5.7 A - Peak voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Energy-handling capacity for non-repetitive 10/1000 µs transients; supports IEC 61000-4-5 Level 4 compliance. |
| IPPM (Peak Pulse Current) | 5.7 A - Maximum surge current sustained without degradation; validated per Fig. 3 waveform in datasheet. |
| TJmax | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. Polarity: unmarked for bidirectional operation - no cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts equally in either polarity during overvoltage events. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in bidirectional configuration; forms symmetrical clamping pair. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 400 W peak pulse power | Supports robust immunity against IEC 61000-4-5 surges up to 4 kV (open-circuit) in compact SMA footprint. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS sensor interfaces requiring long-term reliability. |
| MSL Level 1 (260 °C) | Allows lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 µA) over lifetime, even under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pairs or supply rails to limit transient excursions. Use Value: Maintains signal integrity below 70.1 V clamping level during 400 W surges, preventing latch-up or damage to 5 V/3.3 V interface ICs. |
Use Scenario: Safeguarding digital input/output terminals of programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS on each I/O line to shunt transient energy before reaching isolation barriers or microcontroller GPIOs. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards using a single 2-pin SMT component per line. |
| Consumer Device USB Port Protection | Telecom Line Interface Protection |
|
Use Scenario: Shielding USB 2.0 data lines (D+/D−) and VBUS rail in portable chargers and docking stations from ESD and hot-plug spikes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed directly at connector to minimize stub length and preserve signal rise time. Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) within nanoseconds while adding <1 pF parasitic capacitance to maintain 480 Mbps signaling integrity. |
Use Scenario: Protecting Ethernet PHY interfaces and telephone line drivers in VoIP gateways and DSL modems from lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Primary-level TVS on tip/ring lines ahead of transformer-coupled isolation to absorb common-mode energy. Use Value: Handles 10/1000 µs surges up to 400 W without degradation, reducing need for secondary protection stages and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Higher 600 W PPPM, larger SMB (DO-214AA) package, 73.5 V VC at 6.5 A | Better suited for higher-energy surges but requires larger PCB footprint and may not fit tight layout constraints. | Select when surge energy exceeds 400 W or when higher clamping margin is acceptable for cost-sensitive industrial designs. |
| 1.5KE51CA | Through-hole DO-15 package, 51 V VBR, 400 W rating, 73.5 V VC at 5.5 A | Not suitable for automated SMT assembly; limited to prototyping or legacy through-hole production. | Choose only for manual assembly, repair, or compatibility with existing DO-15 footprints where rework is unavoidable. |
Compared with SMBJ51CA and 1.5KE51CA, the P4SMA51CAHE3_A/I offers optimal balance of AEC-Q101 qualification, SMA footprint efficiency, and precise 70.1 V clamping - making it preferred for new automotive and high-density industrial designs where reliability, size, and SMT manufacturability are jointly critical.
Availability
P4SMA51CAHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and consumer USB interface hardening requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA51CAHE3_A/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, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified, and industry-standard solutions.
The P4SMA Series targets cost-effective, high-volume transient suppression in space-constrained applications - engineered for AEC-Q101 compliance, automated SMT assembly, and consistent clamping performance across extended temperature ranges.
FAQ
What is the clamping voltage of P4SMA51CAHE3_A/I at its rated peak pulse current?
The P4SMA51CAHE3_A/I has a maximum clamping voltage (VC) of 70.1 V at 5.7 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of the Vishay datasheet 88367 and defines the upper voltage limit imposed on protected circuits during surge events. The P4SMA51CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is P4SMA51CAHE3_A/I suitable for automotive applications?
Yes, P4SMA51CAHE3_A/I is AEC-Q101 qualified and carries the "HE3" suffix indicating RoHS-compliant, automotive-grade construction. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D, making it appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh conditions is mandatory.
What does the "CA" suffix mean in P4SMA51CAHE3_A/I?
The "CA" suffix in P4SMA51CAHE3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical VBR, VWM, and VC characteristics for positive and negative transients. This eliminates the need for polarity-aware placement and simplifies layout for AC-coupled or floating signal lines.
What is the standoff voltage (VWM) of P4SMA51CAHE3_A/I and why does it matter?
The standoff voltage (VWM) of P4SMA51CAHE3_A/I is 43.6 V - the maximum continuous DC or RMS voltage the device can withstand without entering avalanche conduction. This parameter ensures normal circuit operation remains undisturbed while guaranteeing rapid clamping when transients exceed this threshold. Selecting a VWM ≥10–20% above system operating voltage prevents false triggering.
Does P4SMA51CAHE3_A/I require special PCB layout considerations?
Yes - to achieve rated 400 W pulse power, P4SMA51CAHE3_A/I must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, per Figure 1 in datasheet 88367. Short, direct traces to protected nodes and minimized loop area reduce inductance, preserving sub-nanosecond response. Avoid thermal relief on pads to ensure optimal heat dissipation during surge events.
P4SMA51CAHE3_A/I 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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA51CAHE3_A/I FAQ
1.How can I place an order for P4SMA51CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51CAHE3_A/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 P4SMA51CAHE3_A/I reliable?
The price and inventory of P4SMA51CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA51CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51CAHE3_A/I?
P4SMA51CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51CAHE3_A/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 P4SMA51CAHE3_A/I?
For technical support, including P4SMA51CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA51CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA51CAHE3_A/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 P4SMA51CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA51CAHE3_A/I?
All P4SMA51CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51CAHE3_A/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 P4SMA51CAHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA51CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51CAHE3_A/I 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 …
