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Vishay General Semiconductor - Diodes Division SA33CHE3/54
- Part No.:
- SA33CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA33CHE3/54.pdf
- Description:
- TVS DIODE 33VWM 59VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,912
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Product details
Overview
SA33CHE3/54 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 μs), 53.3 V maximum clamping voltage at 9.4 A peak pulse current, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA33CHE3/54 datasheet, SA33CHE3/54 pinout, SA33CHE3/54 application, or SA33CHE3/54 equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom power rails where bidirectional clamping, low leakage (<1.0 μA at VWM), and high-temperature operation (–55 °C to +175 °C) are required.
Technical Context
The SA33CHE3/54 operates as a bi-directional avalanche diode with symmetrical clamping in both polarities, enabling transient suppression without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, critical for consistent clamping under repetitive surges.
Designed for 10/1000 μs waveform compliance, it delivers 500 W peak pulse power with derating above 25 °C ambient, and supports steady-state dissipation of 3.0 W on an infinite heatsink at 75 °C lead temperature. The device meets JESD22-B102 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed breakdown range ensures reliable turn-on within ±5 % tolerance across production lot. |
| IPPM | 9.4 A - Peak pulse current capability at 10/1000 μs waveform; determines minimum line impedance needed for effective clamping. |
| VC | 53.3 V - Maximum clamped voltage at IPPM; sets upper bound on protected circuit stress during worst-case surge. |
| ID @ VWM | <1.0 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max. | +175 °C - Enables placement near hot components (e.g., power MOSFETs, engine control units) without thermal derating penalties. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine management, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Bi-directional devices have no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals; either lead may connect to line or ground - simplifies PCB layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| 500 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 24 V supply rails without degradation. |
| AEC-Q101 qualification | Validated for automotive temperature cycling, mechanical shock, and board-level reliability - suitable for under-hood deployment. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin. |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker resistance - eliminates tin whisker risk in long-life automotive and industrial systems. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive input stages. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor interface ICs during 12 V/24 V system surges, maintaining ASIL-B functional safety integrity. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers against field-wiring induced surges and lightning-induced coupling. IC Role / Device Role / Timing Role: Primary surge shunt mounted at terminal block entry point, absorbing energy before reaching precision op-amps and ADC front-ends. Use Value: Maintains <±0.1 % full-scale accuracy after repeated 1 kV/500 A surge events, eliminating calibration drift caused by transient-induced offset shifts. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Clamping induced transients on –48 V DC telecom power distribution boards exposed to switching noise and accidental short circuits. IC Role / Device Role / Timing Role: Bidirectional suppressor connected between –48 V rail and return, limiting voltage excursions to ≤–53.3 V during fault conditions. Use Value: Enables compliance with GR-1089-CORE Level 3 surge immunity without requiring additional series impedance or active regulation. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers from back-EMF spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Localized TVS at motor driver output stage, clamping inductive kickback before it couples into logic supply domains. Use Value: Reduces MCU reset events by >99 % during motor commutation, eliminating firmware lockups in IEC 60335-certified white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same DO-214AC (SMA) package; 33 V VWM, 500 W rating, but lower IPPM (10.3 A) and higher VC (53.3 V same, but tighter VBR tolerance ±3.5 %). | Surface-mount only; requires reflow-compatible layout; not axial-leaded for through-hole legacy designs. | Select SMAJ33CA when space-constrained PCBs demand SMT assembly and thermal performance permits smaller footprint. |
| P6SMB33CA | DO-214AA (SMB) package; identical VWM/VBR/VC, but rated for 600 W peak pulse power and higher IPPM (12.3 A). | Higher power handling suits 48 V industrial systems with larger surge budgets; slightly larger package height (2.6 mm vs. 2.3 mm). | Choose P6SMB33CA for applications requiring margin beyond IEC 61000-4-5 Level 4 or extended surge repetition rates. |
Compared with SA33CHE3/54, SMAJ33CA offers tighter VBR control in a smaller SMT package but lacks axial-leaded compatibility, while P6SMB33CA provides higher surge headroom in a marginally larger SMB outline - both require layout revision and do not offer drop-in replacement.
Availability
SA33CHE3/54 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O conditioning, and telecom power rail stabilization requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for SA33CHE3/54 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 high-volume manufacturability.
The SAxxCH series targets high-reliability transient suppression in automotive and industrial environments, with AEC-Q101 qualification, extended temperature range, and rigorous process controls for mission-critical signal and power line protection.
FAQ
What is the polarity configuration of SA33CHE3/54?
The SA33CHE3/54 is a bi-directional TVS diode with symmetrical avalanche characteristics - neither terminal is designated anode or cathode. This allows flexible placement across differential lines or unidirectional rails without orientation concerns, and eliminates risk of incorrect installation in automated assembly.
Does SA33CHE3/54 meet automotive qualification standards?
Yes, SA33CHE3/54 carries the HE3 suffix indicating AEC-Q101 qualification. It has passed stress tests including temperature cycling, mechanical shock, and high-temperature operating life, making it suitable for engine control modules, body control units, and ADAS sensor interfaces per automotive OEM requirements.
What is the maximum clamping voltage of SA33CHE3/54 under surge conditions?
The SA33CHE3/54 exhibits a maximum clamping voltage (VC) of 53.3 V at its rated peak pulse current (IPPM) of 9.4 A using the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can SA33CHE3/54 be used in AC signal line protection?
Yes, SA33CHE3/54 is explicitly designed for bi-directional applications and supports AC-coupled signal paths such as RS-485, CAN, and audio interfaces. Its symmetrical VBR and VC ensure equal clamping magnitude for positive and negative transients, preserving signal fidelity.
What packaging and reel format does SA33CHE3/54 ship in?
SA33CHE3/54 ships in 13-inch diameter paper tape and reel format with a base quantity of 4000 units per reel (package code 54). The device is RoHS-compliant and meets JESD201 Class 2 whisker resistance, supporting lead-free reflow and wave soldering processes.
SA33CHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- 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)
SA33CHE3/54 FAQ
1.How can I place an order for SA33CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA33CHE3/54 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 SA33CHE3/54 reliable?
The price and inventory of SA33CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA33CHE3/54 is usually 5 days.
3.What payment methods are accepted for SA33CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA33CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA33CHE3/54?
SA33CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA33CHE3/54 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 SA33CHE3/54?
For technical support, including SA33CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA33CHE3/54 requirements.
6.How does Aetrix verify that SA33CHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA33CHE3/54 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 SA33CHE3/54 meets industry standards.
7.What is the process for return or replacement of SA33CHE3/54?
All SA33CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA33CHE3/54, 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 SA33CHE3/54 part is unused and in its original packaging.
Return procedure for SA33CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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