My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA39CA-E3/5A
- Part No.:
- P4SMA39CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA39CA-E3/5A.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,271
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA39CA-E3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 33.3 V standoff voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 7.4 A peak pulse current, and 400 W peak pulse power capability with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA39CA-E3/5A datasheet, P4SMA39CA-E3/5A pinout, P4SMA39CA-E3/5A application, or P4SMA39CA-E3/5A equivalent, key selection considerations include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics forward and reverse - enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while the low RθJL (30 °C/W) supports reliable energy dissipation during transient events.
The device complies with MSL Level 1 per J-STD-020 and withstands peak reflow temperatures up to 260 °C. It delivers 400 W peak pulse power at ≤91 V (derated to 300 W above 91 V), with clamping performance validated under standardized 10/1000 µs surge waveforms per ANSI/IEEE C62.35.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 33.3 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Voltage at which device transitions into avalanche conduction; ensures predictable turn-on during overvoltage |
| VC (Clamping) | 53.9 V at 7.4 A - Maximum voltage seen by protected circuit during 10/1000 µs surge; critical for downstream component survivability |
| PPPM | 400 W - Peak transient power handling capacity under standard 10/1000 µs waveform; determines robustness against lightning or ESD surges |
| IPPM | 7.4 A - Peak surge current supported at rated clamping voltage; directly relates to system-level surge immunity level |
| TJ max | 150 °C - Maximum junction temperature; sets thermal design limits for PCB copper pad sizing and ambient operating range |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002. Bidirectional configuration has no polarity marking - terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical avalanche junction; conducts during positive overvoltage events |
| Anode | Transient current exit (negative half-cycle) | Same physical terminal serves as cathode-equivalent path during negative transients due to bidirectional structure |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in AC or differential interfaces |
| 400 W peak pulse power | Validated with 10/1000 µs waveform - meets IEC 61000-4-5 Level 3 (1 kV line-to-line) surge immunity requirements |
| Glass-passivated junction | Stable avalanche characteristics over temperature and lifetime - ensures consistent clamping voltage across 150 °C max junction operation |
| AEC-Q101 qualified | Qualified variant available (P4SMA39CAHE3_A); this E3/5A version is RoHS-compliant commercial grade with same core die |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - supports standard lead-free assembly without moisture sensitivity concerns |
Applications
| Automotive Sensor Signal Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential or single-ended signal lines to clamp ±100 V transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to microcontroller ADC inputs and transceiver front-ends while maintaining signal integrity below 33.3 V normal operation. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to limit transient voltage before optocoupler or Schmitt trigger input stage. Use Value: Enables >20 kV ESD contact immunity and 1 kV IEC 61000-4-5 surge tolerance without adding series impedance or affecting 1 ms response timing. |
| Telecom Line Interface Protection | Consumer Power Supply Clamp |
Use Scenario: Shielding Ethernet PHY magnetics secondary side or RS-485 transceiver bus lines from lightning-induced common-mode surges in outdoor equipment. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between differential pair and ground to suppress mode conversion transients. Use Value: Maintains <1 pF junction capacitance at VWM (per typical curve Fig. 4), avoiding signal integrity degradation at 100 Mbps data rates. |
Use Scenario: Secondary-side overvoltage suppression on 5 V/12 V DC-DC converter outputs feeding sensitive SoCs or memory in smart home hubs. IC Role / Device Role / Timing Role: Fast-acting shunt element that activates only during fault conditions, remaining high-impedance during normal regulation. Use Value: Limits output overshoot to ≤53.9 V during startup or feedback loop failure, preventing catastrophic failure of downstream 5 V-rated components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Higher VWM (36 V), higher VC (58.1 V), same SMA footprint but larger SMB (DO-214AA) package - 1.6× higher thermal mass | Lower clamping ratio (VC/VBR ≈ 1.55 vs. 1.46), better for higher-energy surges where 33.3 V standoff is insufficient | Select when board space allows larger SMB package and system requires ≥36 V operating margin |
| 1.5KE39CA | Through-hole TO-218 package, 1500 W rating, same 39 V nominal breakdown - significantly higher surge capacity but incompatible mounting | Designed for primary-side AC line protection; not suitable for dense SMT layouts or signal-line placement | Choose only for legacy through-hole designs or where >400 W pulse power is mandatory and rework is acceptable |
Compared with SMBJ36CA and 1.5KE39CA, P4SMA39CA-E3/5A offers optimal balance of compact SMA footprint, precise 33.3 V standoff, and verified 400 W surge capability - making it preferred for modern SMT-based signal-line protection where board area and thermal management are constrained.
Availability
P4SMA39CA-E3/5A is available at Aetrix Electronics and suitable for industrial PLC input protection, automotive sensor interface hardening, telecom line interface shielding, and consumer power supply clamping requiring stable component supply and full traceability.
Supply support for P4SMA39CA-E3/5A 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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The P4SMA Series targets cost-sensitive yet robust transient suppression in space-constrained applications - engineered for automated SMT assembly, high-volume manufacturing, and compliance with industrial and automotive environmental standards.
FAQ
What is the polarity configuration of P4SMA39CA-E3/5A?
P4SMA39CA-E3/5A is a bidirectional TVS diode with symmetrical electrical characteristics in both directions. Unlike unidirectional variants (e.g., P4SMA39A), it has no cathode band marking and provides identical VBR, VC, and IPPM performance whether voltage is applied anode-to-cathode or cathode-to-anode - essential for protecting AC-coupled or differential signal paths without polarity constraints. This symmetry is confirmed in the "DEVICES FOR BIDIRECTION APPLICATIONS" section of the Vishay P4SMA datasheet (Doc. #88367).
Does P4SMA39CA-E3/5A meet AEC-Q101 qualification?
P4SMA39CA-E3/5A itself is the RoHS-compliant commercial-grade variant with E3 suffix and 5A tape-and-reel packaging. While the P4SMA39CAHE3_A variant is explicitly AEC-Q101 qualified, the P4SMA39CA-E3/5A shares the same silicon die and construction - differing only in test screening and traceability documentation. For automotive applications requiring formal qualification, the HE3-suffixed version must be specified; however, P4SMA39CA-E3/5A remains suitable for non-safety-critical automotive subsystems where full AEC-Q101 documentation is not mandated.
What is the maximum clamping voltage of P4SMA39CA-E3/5A under surge conditions?
The maximum clamping voltage (VC) of P4SMA39CA-E3/5A is 53.9 V at a peak pulse current (IPPM) of 7.4 A, tested with the standard 10/1000 µs double-exponential waveform. This value represents the highest voltage the protected circuit will experience during a defined surge event - critical for ensuring downstream components (e.g., 3.3 V or 5 V ICs) remain within absolute maximum ratings. The clamping performance is guaranteed across the full operating temperature range (−65 °C to +150 °C) per the Vishay P4SMA datasheet.
How does the thermal resistance of P4SMA39CA-E3/5A affect PCB layout?
P4SMA39CA-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges or elevated ambient conditions, designers must allocate sufficient copper area and consider thermal vias beneath the SMA package. Derating curves in Figure 2 of the Vishay datasheet show power capability drops linearly above 25 °C ambient - e.g., at 75 °C ambient, only ~65 % of rated 400 W pulse power is sustainable without exceeding TJ = 150 °C.
Can P4SMA39CA-E3/5A replace P4SMA39A in a design?
No - P4SMA39CA-E3/5A and P4SMA39A are not interchangeable without circuit review. P4SMA39A is unidirectional (cathode-marked, conducts only in reverse), while P4SMA39CA-E3/5A is bidirectional (no marking, symmetric conduction). Substituting one for the other may cause unintended conduction during normal bias conditions - especially in DC-biased signal paths. The "CA" suffix explicitly denotes bidirectional functionality, and the datasheet confirms distinct VBR test conditions: 1 mA for unidirectional vs. 1 mA in either direction for bidirectional. Always verify polarity requirements before substitution.
P4SMA39CA-E3/5A 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA39CA-E3/5A FAQ
1.How can I place an order for P4SMA39CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA39CA-E3/5A 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 P4SMA39CA-E3/5A reliable?
The price and inventory of P4SMA39CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA39CA-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA39CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA39CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA39CA-E3/5A?
P4SMA39CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA39CA-E3/5A 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 P4SMA39CA-E3/5A?
For technical support, including P4SMA39CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA39CA-E3/5A requirements.
6.How does Aetrix verify that P4SMA39CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA39CA-E3/5A 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 P4SMA39CA-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA39CA-E3/5A?
All P4SMA39CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA39CA-E3/5A, 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 P4SMA39CA-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA39CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA39CA-E3/5A 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
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…
