My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA51CAHE3/5A
- Part No.:
- P4SMA51CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51CAHE3/5A.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,529
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA51CAHE3/5A 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 51 V breakdown voltage (VBR min/max = 48.5–53.6 V at 1 mA), 400 W peak pulse power (10/1000 µs), and clamps to ≤70.1 V at 5.7 A peak pulse current - used in automotive sensor protection, industrial I/O interfaces, and telecom line surge suppression.
For engineers reviewing the P4SMA51CAHE3/5A datasheet, P4SMA51CAHE3/5A pinout, P4SMA51CAHE3/5A application, or P4SMA51CAHE3/5A equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), clamping behavior under transient stress, and direct alternatives with documented parameter differences.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM in either direction. Its glass-passivated junction ensures stable avalanche characteristics and low leakage (<1 µA at 43.6 V stand-off).
Designed for automated SMT assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and supports repetitive surge duty cycles up to 0.01% - delivering 400 W pulse capability below 91 V and 300 W above that threshold per derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines reliable avalanche initiation window for bidirectional clamping |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 70.1 V at 5.7 A - clamped voltage during 10/1000 µs transient, limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling capacity under standard lightning-surge waveform |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB pad layout design |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional device with no polarity marking - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current in either polarity; connects to protected line |
| Cathode | Transient current exit (bidirectional) | Completes low-impedance path to ground or reference rail during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR, VC, and IPPM in both directions enables single-device protection of AC-coupled or floating lines |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable, repeatable avalanche performance over lifetime and temperature extremes |
| MSL Level 1 rating | Supports lead-free reflow without preconditioning - compatible with standard SMT production lines |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp ±100 V surges within nanoseconds. Use Value: Prevents latch-up or permanent damage to microcontrollers and signal conditioners by limiting voltage to ≤70.1 V during 5.7 A transients. |
Use Scenario: Shielding PLC digital input modules from field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Standoff voltage (43.6 V) allows compatibility with 24 V DC control logic while suppressing >1 kV transients. Use Value: Enables robust operation in electrically noisy environments without requiring additional series impedance or filtering. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers against ESD and lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamping device placed across differential pairs or line-to-ground. Use Value: Maintains signal integrity up to 100 Mbps while absorbing 400 W pulses without degradation. |
Use Scenario: Secondary-side transient suppression on 5–12 V DC outputs of wall adapters exposed to user-handling ESD. IC Role / Device Role / Timing Role: Fast-response TVS shunting surge energy away from USB ports or charging circuits. Use Value: Meets IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact) with minimal board space in SMA footprint. |
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 | Same VBR range (48.5–53.6 V), but SMB package (DO-214AA); 600 W PPPM; RθJA = 80 °C/W | Higher power handling and better thermal dissipation, but larger footprint (4.6 × 3.9 mm vs. 4.3 × 2.6 mm) | Select when higher surge margin or improved thermal performance is required and board space permits SMB size. |
| 1.5KE51CA | Through-hole DO-201 package; same VBR, 51 V; 1500 W PPPM; slower response due to higher junction capacitance | Used in legacy or high-energy industrial power supply designs where manual assembly or mechanical robustness is prioritized | Choose only for through-hole designs needing >1 kW surge rating; not suitable for high-speed signal lines. |
Compared with SMBJ51CA and 1.5KE51CA, the P4SMA51CAHE3/5A offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge capability - making it preferred for space-constrained automotive and industrial SMT assemblies where reliability and manufacturability are critical.
Availability
P4SMA51CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, AEC-Q101 compliance, and RoHS-compliant packaging.
Supply support for P4SMA51CAHE3/5A 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 optimization.
The P4SMA Series targets cost-sensitive, high-volume transient suppression needs in automotive, industrial, and communications equipment - engineered for robust surge immunity in compact surface-mount form factors.
FAQ
What does the "CA" suffix mean in P4SMA51CAHE3/5A?
The "CA" suffix indicates a bidirectional configuration: the device provides symmetrical transient suppression in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity. This makes P4SMA51CAHE3/5A ideal for protecting AC-coupled signals, differential buses like RS-485, or floating sensor outputs where polarity reversal may occur during transients.
Is P4SMA51CAHE3/5A qualified for automotive use?
Yes, P4SMA51CAHE3/5A carries the HE3 suffix, denoting RoHS-compliant construction and full AEC-Q101 qualification. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per JESD22-A114 - confirming suitability for under-hood and body-control module applications per automotive OEM requirements.
What is the maximum clamping voltage of P4SMA51CAHE3/5A under surge conditions?
The maximum clamping voltage (VC) of P4SMA51CAHE3/5A is 70.1 V at 5.7 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured after the device enters avalanche conduction and represents the upper voltage limit imposed on protected circuitry during a defined transient event.
How does the SMA (DO-214AC) package of P4SMA51CAHE3/5A compare to SMB or SMC packages?
The SMA package of P4SMA51CAHE3/5A measures 4.3 × 2.6 mm with a 2.54 mm lead pitch - smaller than SMB (DO-214AA, 4.6 × 3.9 mm) and significantly smaller than SMC (DO-214AB, 7.1 × 6.2 mm). While its RθJA is 120 °C/W (higher than SMB's 80 °C/W), the SMA footprint enables dense routing in space-constrained layouts typical in automotive ECUs and portable telecom gear.
Can P4SMA51CAHE3/5A be used in place of a unidirectional TVS like P4SMA51A?
No - P4SMA51CAHE3/5A is strictly bidirectional and lacks polarity marking, whereas P4SMA51A is unidirectional with cathode band identification. Substituting them requires verifying circuit topology: P4SMA51CAHE3/5A suits floating or AC-coupled lines; P4SMA51A is mandatory for DC-biased lines where reverse conduction must be blocked. Interchange alters clamping behavior and may compromise protection.
P4SMA51CAHE3/5A 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:
- Discontinued at Digi-Key
- 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)
P4SMA51CAHE3/5A FAQ
1.How can I place an order for P4SMA51CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51CAHE3/5A 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 P4SMA51CAHE3/5A reliable?
The price and inventory of P4SMA51CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51CAHE3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA51CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51CAHE3/5A?
P4SMA51CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51CAHE3/5A 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 P4SMA51CAHE3/5A?
For technical support, including P4SMA51CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51CAHE3/5A requirements.
6.How does Aetrix verify that P4SMA51CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA51CAHE3/5A 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 P4SMA51CAHE3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA51CAHE3/5A?
All P4SMA51CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51CAHE3/5A, 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 P4SMA51CAHE3/5A part is unused and in its original packaging.
Return procedure for P4SMA51CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51CAHE3/5A 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 …
