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Vishay General Semiconductor - Diodes Division SA14HE3/73
- Part No.:
- SA14HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14HE3/73.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,224
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Product details
Overview
SA14HE3/73 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), 21.6 A peak pulse current (IPPM), and clamps to ≤23.2 V at rated surge. It is AEC-Q101 qualified and used in automotive power supply input stages.
For engineers reviewing the SA14HE3/73 datasheet, SA14HE3/73 pinout, SA14HE3/73 application, or SA14HE3/73 equivalent, this page delivers verified electrical parameters, mechanical package data, real-world protection use cases, and validated alternative parts - all specific to the SA14HE3/73 variant with HE3 (AEC-Q101) qualification and 73 taping code.
Technical Context
This TVS diode operates as a voltage-clamping device in uni-directional configuration, with cathode marked by color band. Its glass-passivated junction enables fast response (<1 ns) to transients and low incremental surge resistance for stable clamping under repetitive 10/1000 µs surges at 0.01% duty cycle.
Rated for -55 °C to +175 °C junction temperature, it supports high-reliability automotive environments. The 3.0 W steady-state power dissipation (at TL = 75 °C) and 70 A IFSM rating allow robust handling of inductive turn-off spikes without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (Breakdown) | 15.6–17.2 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | ≤23.2 V at IPPM - Clamped voltage limits stress on downstream ICs like MCUs or CAN transceivers. |
| IPPM | 21.6 A (10/1000 µs) - Peak surge current capacity compatible with ISO 7637-2 Pulse 1/2a/5a test levels. |
| PPPM | 500 W - Sustains standardized transient energy without degradation under defined waveform conditions. |
| TJ max. | +175 °C - Enables placement near hot components (e.g., power MOSFETs) in engine control units. |
| AEC-Q101 | Qualified - Meets stress testing requirements for automotive electronic systems per JESD22-A108. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Matte tin-plated leads, RoHS-compliant, AEC-Q101 qualified (HE3 suffix). Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry / reverse voltage reference | Connected to protected line's lower-potential side (e.g., GND or low-side return path). |
| Cathode (banded end) | Clamping node / surge sink | Connected to protected line's higher-potential side (e.g., +12 V rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables <1 ns response time and stable leakage performance across temperature (-55 °C to +175 °C). |
| 500 W peak pulse power (10/1000 µs) | Withstands automotive load-dump and inductive switching transients without failure or parameter shift. |
| AEC-Q101 qualification (HE3) | Validated for automotive under-hood applications including powertrain and body control modules. |
| Low incremental clamping resistance | Ensures minimal voltage overshoot during high-current surges, protecting sensitive 3.3 V or 5 V logic interfaces. |
| Matte tin plating, J-STD-002 compliant | Guarantees reliable solder wetting and intermetallic formation in reflow and wave soldering processes. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: 12 V battery-fed ECU input subjected to ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump). IC Role / Device Role / Timing Role: Primary clamping element placed between fuse and DC-DC converter input, absorbing surge energy before it reaches regulation circuitry. Use Value: Limits voltage seen by downstream buck controller to ≤23.2 V, preventing latch-up or gate oxide damage in integrated FETs. |
Use Scenario: Analog output line (e.g., 4–20 mA current loop) from pressure sensor exposed to ESD and cable-induced transients in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) shunt clamp on signal line, referenced to system ground, activated only during overvoltage. Use Value: Maintains signal integrity below 10 mV error during normal operation while clamping ±1 kV ESD (IEC 61000-4-2) to safe levels. |
| Consumer Power Adapter Surge Suppression | Telecom DC Feeder Line Protection |
|
Use Scenario: Secondary-side 5 V/9 V output of wall adapter exposed to lightning-induced surges via AC mains coupling. IC Role / Device Role / Timing Role: Final-stage TVS on low-voltage DC output, positioned after filtering but before USB or charging IC interface. Use Value: Prevents overvoltage damage to USB-PD controllers or battery management ICs during 500 W transient events. |
Use Scenario: -48 V DC feeder line powering remote radio units in cellular base stations, subject to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Uni-directional clamp referenced to negative rail, protecting line driver/receiver ICs from positive-going transients. Use Value: Withstands 21.6 A surge at -48 V bias, limiting clamped voltage to ≤23.2 V above rail - within safe margin for -52 V tolerant receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/5A | Same VWM (14 V), same DO-214AC (SMA) package, 400 W PPPM (vs. 500 W), 17.1 A IPPM. | Lower surge rating; suitable for non-automotive consumer or industrial apps with lower threat levels. | Select SMAJ14A-E3/5A only if board space allows SMA footprint and 400 W rating meets system-level surge test requirements. |
| 1.5KE14A | Same VWM (14 V), DO-201AD package, 1500 W PPPM (10/1000 µs), 100 A IPPM, but larger size and higher VF. | Higher power handling; suited for front-end protection where physical size permits and higher surge immunity is mandated. | Choose 1.5KE14A when system-level testing requires >500 W capability and PCB layout accommodates larger DO-201AD outline. |
Compared with SA14HE3/73, SMAJ14A-E3/5A offers smaller footprint but reduced surge margin, while 1.5KE14A provides higher robustness at the cost of board area and thermal mass - SA14HE3/73 uniquely balances AEC-Q101 compliance, 500 W rating, and DO-15 form factor for space-constrained automotive modules.
Availability
SA14HE3/73 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom DC feeders, and consumer power adapters requiring stable component supply with AEC-Q101 assurance and consistent DO-15 lead-forming.
Supply support for SA14HE3/73 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, automotive qualification, and application-specific performance.
The SAxxA series is engineered for robust transient suppression in harsh environments - targeting automotive power distribution, industrial control inputs, and telecom infrastructure where repeatable clamping and long-term stability are critical.
FAQ
What is the polarity configuration of SA14HE3/73?
The SA14HE3/73 is a uni-directional Transient Voltage Suppressor. Its cathode is marked by a visible color band on the DO-204AC (DO-15) package body. During normal operation, it blocks reverse voltage up to 14 V (VWM); when a positive transient exceeds its breakdown range (15.6–17.2 V), it conducts from cathode to anode, clamping the line. This configuration makes SA14HE3/73 appropriate for DC rail protection where polarity is fixed.
Is SA14HE3/73 suitable for ISO 7637-2 Pulse 5a (load dump) protection?
Yes, SA14HE3/73 is rated for 500 W peak pulse power with a 10/1000 µs waveform and is AEC-Q101 qualified - both essential for load dump compliance. Its 21.6 A IPPM and ≤23.2 V clamping voltage at that current enable effective suppression of the 12 V system's 35 V/100 ms load dump event when used with appropriate series impedance. SA14HE3/73 is commonly deployed upstream of DC-DC converters in automotive ECUs for this purpose.
How does the HE3 suffix affect SA14HE3/73 compared to SA14A-E3?
The HE3 suffix denotes AEC-Q101 qualification and JESD201 Class 2 whisker resistance, whereas E3 indicates commercial-grade RoHS compliance only. SA14HE3/73 undergoes additional stress testing (e.g., temperature cycling, HTRB, UHAST) required for automotive under-hood use. Electrically identical to SA14A-E3 in VWM, VBR, and PPPM, SA14HE3/73 adds traceability, lot-level qualification records, and extended temperature validation - making it mandatory for Tier 1 automotive designs.
What is the maximum allowable lead temperature during soldering for SA14HE3/73?
The SA14HE3/73 leads are rated for solder dip at 275 °C maximum for 10 seconds per JESD22-B106, and are compatible with standard reflow profiles per J-STD-020. Matte tin plating ensures solderability per J-STD-002 and JESD22-B102. Exceeding 275 °C or prolonged exposure risks epoxy cracking or junction degradation - always verify profile against Vishay's recommended thermal profile for DO-204AC packages.
Can SA14HE3/73 be used in bi-directional applications?
No - SA14HE3/73 is strictly uni-directional. Bi-directional variants in the same family carry the "CA" suffix (e.g., SA14CA). Using SA14HE3/73 in a bi-directional circuit would result in forward conduction during negative transients, causing failure or uncontrolled current flow. For AC or dual-polarity signal protection, select SA14CA or equivalent bi-directional TVS with matched VWM and PPPM ratings.
SA14HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 19.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA14HE3/73 FAQ
1.How can I place an order for SA14HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14HE3/73 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 SA14HE3/73 reliable?
The price and inventory of SA14HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14HE3/73 is usually 5 days.
3.What payment methods are accepted for SA14HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14HE3/73?
SA14HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14HE3/73 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 SA14HE3/73?
For technical support, including SA14HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14HE3/73 requirements.
6.How does Aetrix verify that SA14HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA14HE3/73 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 SA14HE3/73 meets industry standards.
7.What is the process for return or replacement of SA14HE3/73?
All SA14HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA14HE3/73, 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 SA14HE3/73 part is unused and in its original packaging.
Return procedure for SA14HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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