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Diodes Incorporated ZTX696B
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- Part No.:
- ZTX696B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3
- Datasheet:
-
ZTX696B.pdf
- Description:
- TRANS NPN 180V 0.5A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:3,738
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Product details
Overview
ZTX696B from Diodes Incorporated is an NPN silicon planar medium-power high-gain transistor in TO-92 package, rated for 180 V VCEO, 500 hFE at IC = 100 mA, and 0.2 V VCE(sat) at IC = 50 mA / IB = 0.5 mA. It serves as a Darlington pair driver in relay/solenoid control and battery-powered motor interfaces.
For engineers reviewing the ZTX696B datasheet, ZTX696B pinout, ZTX696B application, or ZTX696B equivalent, key selection criteria include its 180 V breakdown rating, low 0.2 V saturation voltage, 70 MHz fT, thermal resistance of 175 °C/W (junction-to-ambient, PCB-mounted), and suitability for medium-current switching up to 500 mA.
Technical Context
The ZTX696B is a discrete NPN bipolar junction transistor optimized for linear amplification and saturated switching in medium-voltage, medium-current applications. Its 180 V VCEO and VCBO ratings support operation in 12–48 V industrial control rails with margin, while its 500 hFE at 100 mA enables efficient base drive with minimal current overhead.
Designed for pulsed and DC operation up to +175 °C junction temperature, it features low VCE(sat) (0.2–0.25 V) across 50–200 mA loads and exhibits 70 MHz transition frequency - confirming usable gain-bandwidth for audio-frequency switching and moderate-speed digital interface buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 180 V - Supports operation in 48 V systems with ≥2.7× safety margin against transients |
| hFE | 500 min at IC = 100 mA - Enables low-base-current drive for efficient Darlington configurations |
| VCE(sat) | 0.2 V typ at IC = 50 mA / IB = 0.5 mA - Minimizes conduction loss in battery-powered load switching |
| fT | 70 MHz - Sufficient for audio-range amplification and PWM frequencies up to ~5 MHz |
| Ptot | 1.5 W at Tamb = 25 °C - Delivers 500 mA continuous collector current with proper PCB copper area (1 in²) |
| Rth(j–amb) | 175 °C/W - Requires thermal-aware layout on FR-4 with ≥1 in² copper pour for sustained 1 W dissipation |
Pinout & Package
Package: TO-92 (E-Line compatible), through-hole, epoxy-molded plastic case with standard lead spacing and orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Connected to ground or low-side return path; lowest impedance node during saturation |
| Base (B) | Control input | Receives forward-biased current to enable conduction; requires series resistor for current limiting |
| Collector (C) | Current source terminal | Connected to load and supply rail; carries full switched load current with minimal voltage drop |
Key Features
| Feature | Design Value |
|---|---|
| High voltage capability | 180 V VCEO - Enables direct replacement of legacy high-voltage transistors without redesign |
| Low saturation voltage | 0.2 V typical - Reduces power loss and heat generation in battery-fed solenoid drivers |
| High DC current gain | hFE ≥ 500 at 100 mA - Allows microcontroller GPIOs to directly drive moderate loads without buffer stages |
| Wide operating temperature | −55 °C to +200 °C Tj - Suitable for under-hood automotive and industrial environments with minimal derating |
Applications
| Relay Driver Circuit | Battery-Powered Motor Control |
|---|---|
Use Scenario: Driving 12 V/24 V electromagnetic relays in programmable logic controllers and HVAC control panels. IC Role / Device Role / Timing Role: NPN switch providing low-impedance path between relay coil and ground during activation. Use Value: 0.2 V VCE(sat) minimizes coil voltage drop, ensuring reliable pull-in at end-of-battery-life voltages. | Use Scenario: H-bridge half-bridge stage or unidirectional DC motor driver in portable tools and medical pumps. IC Role / Device Role / Timing Role: Medium-current saturated switch controlling motor direction or enable state via microcontroller GPIO. Use Value: 500 hFE allows direct drive from 3.3 V MCU outputs with ≤1 mA base current, eliminating level-shifting circuitry. |
| Darlington Pair Input Stage | Industrial Solenoid Interface |
Use Scenario: First-stage amplifier in high-gain Darlington configurations for sensor signal conditioning or analog output drivers. IC Role / Device Role / Timing Role: High-hFE pre-driver that reduces required base current for second-stage power transistor. Use Value: 180 V breakdown supports cascaded operation with higher-voltage output transistors in industrial I/O modules. | Use Scenario: Driving 24 V DC solenoids in factory automation valves and pneumatic actuators. IC Role / Device Role / Timing Role: Final-stage switch interfacing PLC outputs to inductive solenoid loads. Use Value: 175 °C/W Rth(j–amb) and −55 °C to +200 °C rating ensure stable operation in hot, enclosed control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX653 | Lower VCEO (100 V), lower hFE (250 min), same TO-92 package | Not suitable for >100 V bus applications; limited headroom in 48 V systems | Select when cost sensitivity outweighs voltage margin requirements |
| MJD127 | Higher Ptot (15 W), TO-220 package, VCEO = 100 V | Requires heatsink and board space; not drop-in for TO-92 footprint | Choose for higher continuous current (>1 A) where thermal management is feasible |
Compared with ZTX653 and MJD127, the ZTX696B uniquely balances 180 V rating, 500 hFE, and TO-92 form factor - making it optimal for space-constrained, high-voltage, medium-current switching where thermal budget permits 1.5 W dissipation.
Availability
ZTX696B is available at Aetrix Electronics and suitable for relay drivers, battery-powered motor controls, and industrial solenoid interfaces requiring stable component supply and long-term manufacturability.
Supply support for ZTX696B 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, industry-standard components for power management, signal integrity, and protection.
The ZTX696B belongs to Diodes' legacy high-voltage bipolar transistor product line, engineered for robustness in industrial control, automotive subsystems, and power interface applications demanding proven reliability and wide temperature operation.
FAQ
Is ZTX696B RoHS compliant?
Yes, the ZTX696B is RoHS compliant and halogen-free per Diodes Incorporated's product change notification PCN-2017-001. Lead finish is matte tin, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for unlimited floor life at ≤30 °C/85% RH.
What is the maximum safe continuous collector current at 70°C ambient?
At Tamb = 70 °C, derating from 1.5 W at 25 °C applies at 5.7 mW/°C. Maximum allowable power is 1.2465 W. With VCE(sat) ≈ 0.22 V at 200 mA, safe continuous IC is ~5.7 A × (1.2465 W / 0.22 V) → ~5.7 A, but absolute max IC remains 0.5 A per datasheet - so 500 mA is the hard limit regardless of thermal headroom.
Can ZTX696B be used in linear amplifier mode?
Yes - its hFE stability (500 min at 100 mA), low VCE(sat), and 70 MHz fT support Class-A and AB audio preamplifier stages. However, thermal design must accommodate Ptot limits, and biasing must avoid second breakdown in the safe operating area (SOA) curve shown in the datasheet.
Does ZTX696B have built-in ESD protection?
No - the ZTX696B has no integrated ESD protection diodes. External TVS or RC snubbers are recommended on base and collector lines in systems exposed to IEC 61000-4-2 events, especially when interfaced with long cables or human-accessible connectors.
ZTX696B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 180 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 5mA, 200mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 150 @ 200mA, 5V
- Power - Max:
- 1 W
- Frequency - Transition:
- 70MHz
- Operating Temperature:
- -55°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- E-Line (TO-92 compatible)
ZTX696B FAQ
1.How can I place an order for ZTX696B through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX696B 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 ZTX696B reliable?
The price and inventory of ZTX696B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX696B is usually 5 days.
3.What payment methods are accepted for ZTX696B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX696B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX696B?
ZTX696B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX696B 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 ZTX696B?
For technical support, including ZTX696B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX696B requirements.
6.How does Aetrix verify that ZTX696B is sourced from the original manufacturer or authorized distributors?
All ZTX696B 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 ZTX696B meets industry standards.
7.What is the process for return or replacement of ZTX696B?
All ZTX696B units undergo pre-shipment inspection (PSI). If there is an issue with ZTX696B, 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 ZTX696B part is unused and in its original packaging.
Return procedure for ZTX696B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZTX696B Tags
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