My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA120CAHM3/H
- Part No.:
- P4SMA120CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA120CAHM3/H.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,228
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA120CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features 120 V standoff voltage (VWM), 137 V maximum clamping voltage (VC) at 1.8 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA120CAHM3/H datasheet, P4SMA120CAHM3/H pinout, P4SMA120CAHM3/H application, or P4SMA120CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at VWM), while the 10/1000 µs surge rating reflects real-world lightning and inductive-switching transient immunity.
The device is rated for continuous power dissipation of 3.3 W at 50 °C ambient and supports junction temperatures up to +150 °C. Its low incremental surge resistance and fast response time (<1 ns) allow effective suppression before downstream components experience overvoltage stress - critical for safeguarding sensitive analog front-ends and communication interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 102 V - maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown |
| VBR (Breakdown Voltage) | 114–126 V at 1 mA - sharp, repeatable avalanche onset ensuring predictable protection threshold |
| VC (Clamping Voltage) | 165 V at IPPM = 1.8 A - peak voltage seen by protected circuit during 10/1000 µs transient; determines stress on downstream devices |
| PPPM (Peak Pulse Power) | 400 W - surge energy handling capacity under standardized 10/1000 µs waveform; derates above 25 °C per Fig. 2 |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - minimal DC loading on signal lines, preserving integrity in high-impedance sensing paths |
| TJ max. | +150 °C - enables use in under-hood automotive and industrial environments with elevated ambient temperatures |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement for thermal performance |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as identical surge current entry/exit points; no cathode band marking required for bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - suitable for engine control, ADAS, and infotainment systems |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1 - supports lead-free reflow up to 260 °C peak without delamination |
| 400 W peak pulse power | Withstands repetitive 10/1000 µs surges at 0.01% duty cycle - sufficient for IEC 61000-4-5 Level 4 (4 kV) line-to-line testing |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during clamping - reduces risk of latch-up or gate oxide damage in protected MOSFETs and ICs |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature; eliminates parameter drift caused by moisture or contamination ingress |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and cabin temperature sensors from load dump and ESD events in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor signal pair (e.g., VRH/VRL) to clamp common-mode transients before analog front-end amplifier. Use Value: Prevents sensor output corruption and microcontroller reset during ignition switching or alternator load dump - validated per ISO 7637-2 Pulse 5a. |
Use Scenario: Safeguarding CAN transceiver inputs (CANH/CANL) against EFT and surge in factory automation PLCs and motor drives. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector interface to suppress fast transients before reaching TJA1042 or SN65HVD230. Use Value: Maintains bus integrity during 4 kV EFT bursts (IEC 61000-4-4) without signal distortion or bit errors - enabled by sub-1 ns response and <1 µA leakage. |
| Consumer Power Adapter Output | Telecom DSL Line Interface |
Use Scenario: Secondary-side overvoltage protection on 12–24 V DC outputs of wall adapters and PoE injectors. IC Role / Device Role / Timing Role: Bidirectional clamp across VOUT/GND to absorb flyback spikes from disconnected loads or short-circuit recovery. Use Value: Eliminates need for secondary-side crowbar circuits - reduces BOM count while meeting UL 62368-1 transient immunity requirements. |
Use Scenario: Primary protection for ADSL/VDSL line drivers against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: First-stage TVS placed between line transformer secondary and codec IC to limit induced common-mode voltages. Use Value: Withstands 10/700 µs telecom surges (ITU-T K.21) up to 1.5 kV without degradation - verified via 1000-cycle life testing at rated PPPM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | Same VWM (102 V) and VC (165 V), but SMB package (DO-214AA); 600 W PPPM rating | Higher power handling, larger footprint; requires 7.0 mm × 7.0 mm copper pads | Select when higher surge margin is needed and board space allows larger package |
| 1.5KE120CA | Through-hole DO-201 package; same VWM/VC specs but 1500 W PPPM and higher IFSM (125 A) | Not SMT-compatible; suited for prototyping or legacy through-hole designs | Choose only for manual assembly or where thermal mass of axial-leaded package improves long-duration surge survival |
Compared with SMBJ120CA and 1.5KE120CA, the P4SMA120CAHM3/H offers optimal balance of SMT manufacturability, AEC-Q101 qualification, and compact SMA footprint - making it preferred for high-volume automotive and industrial PCBs where space, reliability, and process compatibility are jointly constrained.
Availability
P4SMA120CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interfaces, consumer power adapter outputs, and telecom DSL line interfaces requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA120CAHM3/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 targets cost-sensitive, high-volume transient suppression needs in automotive, industrial, and communications equipment - delivering AEC-Q101-qualified TVS performance in compact surface-mount packages with consistent parametric stability.
FAQ
What does the 'CA' suffix indicate in P4SMA120CAHM3/H?
The 'CA' suffix in P4SMA120CAHM3/H denotes a bidirectional Transient Voltage Suppressor - meaning it provides symmetrical clamping in both polarities, with identical VWM, VBR, and VC values for positive and negative transients. This eliminates polarity concerns during layout and simplifies protection of AC-coupled or differential signal paths such as CAN, RS-485, or sensor bridges. The P4SMA120CAHM3/H has no cathode marking, confirming its bidirectional nature.
Is P4SMA120CAHM3/H suitable for automotive applications?
Yes, P4SMA120CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability validation. It meets requirements for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD) robustness - making it appropriate for under-hood and cabin applications including engine control modules, body electronics, and ADAS sensor interfaces where transient immunity per ISO 7637-2 is mandatory.
What is the maximum clamping voltage of P4SMA120CAHM3/H and how is it measured?
The maximum clamping voltage (VC) of P4SMA120CAHM3/H is 165 V, measured at a peak pulse current (IPPM) of 1.8 A using the standardized 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value represents the highest voltage the device allows to appear across its terminals during a surge event - directly determining the overvoltage stress imposed on downstream components like microcontrollers or transceivers. VC is guaranteed across the full operating temperature range.
How does the HM3 suffix differ from E3 or M3 in the P4SMA120CAHM3/H ordering code?
The HM3 suffix in P4SMA120CAHM3/H specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from E3 (RoHS-compliant commercial grade) and M3 (halogen-free RoHS-compliant commercial grade). HM3 devices undergo additional automotive stress testing including HTOL, temperature cycling, and bond wire pull tests. The '/H' denotes 7-inch tape-and-reel packaging (1800 units per reel), optimized for high-speed SMT placement.
Can P4SMA120CAHM3/H be used in place of unidirectional TVS diodes?
No - P4SMA120CAHM3/H is strictly bidirectional and must not replace unidirectional TVS diodes (e.g., P4SMA120A) in DC-biased circuits where forward conduction must be blocked. In unidirectional applications, the cathode band provides polarity reference for correct orientation; P4SMA120CAHM3/H lacks this marking and conducts equally in both directions. Substitution would compromise protection in circuits relying on DC blocking, such as power rail clamping or single-ended signal lines with defined ground reference.
P4SMA120CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 1.8A
- 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)
P4SMA120CAHM3/H FAQ
1.How can I place an order for P4SMA120CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA120CAHM3/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 P4SMA120CAHM3/H reliable?
The price and inventory of P4SMA120CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA120CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA120CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA120CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA120CAHM3/H?
P4SMA120CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA120CAHM3/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 P4SMA120CAHM3/H?
For technical support, including P4SMA120CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA120CAHM3/H requirements.
6.How does Aetrix verify that P4SMA120CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA120CAHM3/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 P4SMA120CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA120CAHM3/H?
All P4SMA120CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA120CAHM3/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 P4SMA120CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA120CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA120CAHM3/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 …
