Products Description

Technical Specs Summary

Parameter	Specification
OEM Cross-References	HFBR-1414x-Z \| HFBR-2412x-Z \| HFBR-2412x-NP-Z (Avago/Broadcom)
GIGAC Model Series	DT-1414 / DT-2412 / DT-2412NP (corresponding series)
Transmitter Technology	820nm VCSEL (Vertical-Cavity Surface-Emitting Laser)
Receiver	PIN photodetector
Interface	Threaded ST (3/8-32 UNEF-2A) — panel mount compatible
Data Rate	DC to 5 MBd
Forward Current	60–100 mA (typical)
Transmission Distance	Up to 2.7km (VCSEL high optical output)
Fiber Compatibility	50/125μm \| 62.5/125μm \| 100/140μm \| 200μm (MMF)
Power Supply	Single +5.0V
Logic Interface	TTL-compatible
Dimensions	27.2mm × 12.7mm × 10.2mm
Mounting	Through-hole PCB mount
Protection	Conformal coating (–40°C to +85°C)
Compliance	RoHS \| Lead-free
Applications	Industrial \| Communication & Networking \| Computer Peripherals \| Military & Aerospace

Detailed Product Description

Product Overview

The GIGAC DT-Series 820nm VCSEL Miniature Link Transceiver is a compact, high-performance fiber optic solution designed for robust industrial and communication applications. It is fully compatible with the Avago (Broadcom) HFBR-1414x-Z, HFBR-2412x-Z, and HFBR-2412x-NP-Z miniature link optical modules, covering transmitter-only (HFBR-1414x-Z) and full transceiver (HFBR-2412x-Z / NP-Z) variants.

The transmitter employs a 820nm Vertical-Cavity Surface-Emitting Laser (VCSEL), paired with a PIN photodetector in the receiver section. VCSEL technology provides superior optical output power and beam quality compared to LED transmitters at the same wavelength, enabling transmission distances up to 2.7km over multimode fiber while maintaining stable performance across the DC to 5MBd data rate range. Operating on a single +5.0V supply with TTL-compatible logic, the module minimizes integration complexity in existing industrial and embedded control systems.

The threaded ST connector (3/8-32 UNEF-2A thread) supports secure panel mounting and compatibility with standard multimode ST connectors, ensuring reliable mechanical and optical performance in harsh environments. Enhanced by conformal coating, the module withstands extreme temperatures (–40°C to +85°C) and mechanical stress, making it suitable for industrial settings with high vibration or humidity, and qualified for military and aerospace communication applications.

VCSEL

820nm

820nm VCSEL Transmitter: Vertical-Cavity Surface-Emitting Laser technology delivers higher optical power, narrower spectral width, and longer transmission reach than LED at 820nm — enabling links up to 2.7km vs the shorter distances achievable with LED-based modules.

MIL

AERO

Military & Aerospace qualified: Conformal coating, wide temperature range (–40°C to +85°C), and threaded ST locking connector make this series suitable for mission-critical communication in defense systems, avionics data buses, and ruggedized field equipment.

Key Features

820nm VCSEL transmitter — superior reach and power vs LED-based alternatives

PIN photodetector receiver

Threaded ST connector (3/8-32 UNEF-2A) — panel mount, vibration-resistant locking

DC to 5MBd data rate — full industrial serial speed coverage

Transmission distance up to 2.7km over multimode fiber

Compatible with 50/125μm, 62.5/125μm, 100/140μm, 200μm fiber types

Single +5.0V power supply | Forward current: 60–100mA typical

TTL-compatible logic interface

Through-hole PCB mount — 27.2mm × 12.7mm × 10.2mm

Conformal coating — –40°C to +85°C, moisture and chemical resistant

RoHS compliant | Lead-free

Compatible: Industrial | Military | Aerospace | Computer Peripherals

Technical Advantages

VCSEL vs LED: Superior Reach at 820nm

VCSEL (Vertical-Cavity Surface-Emitting Laser) technology produces coherent, low-divergence optical output at 820nm — significantly higher optical power and narrower spectral width than LED transmitters operating at the same wavelength. This translates to a substantially larger optical link budget, enabling transmission distances up to 2.7km over multimode fiber compared to the shorter reach achievable with 820nm LED modules at the same fiber type. VCSEL also provides better modulation bandwidth, supporting the full DC–5MBd range with greater signal integrity margin.

Threaded ST Connector (3/8-32 UNEF-2A) — Panel Mount with Vibration Lock

The 3/8-32 UNEF-2A thread specification is an industry-standard for secure panel mounting of miniature fiber optic connectors in industrial and military equipment. Unlike bayonet-type or push-pull connectors, the fully threaded engagement resists unscrewing under sustained vibration, shock loads, and cable tension — maintaining fiber alignment and optical performance in mobile platforms, airborne avionics, and high-vibration factory environments. The ST connector also accepts standard multimode ST fiber patch cords and pigtails for straightforward field installation.

Three OEM Part Number Families — One Qualified GIGAC Supplier

The GIGAC DT-Series covers three Avago OEM part number families (HFBR-1414x-Z transmitter, HFBR-2412x-Z transceiver, HFBR-2412x-NP-Z no-panel transceiver), allowing procurement teams to consolidate all three under a single qualified supplier relationship. This is particularly valuable for equipment manufacturers who use a mix of transmitter-only and transceiver variants across different subsystems of the same product family.

Military and Aerospace Qualification

The combination of conformal coating, wide temperature range (–40°C to +85°C), threaded connector locking, and RoHS/lead-free compliance positions the DT-Series as a qualified solution for military communications, avionics data links, and other aerospace ground support equipment. The conformal coating provides resistance to salt fog, humidity, and contamination encountered in shipborne, airborne, and field-deployed defense electronics.

Backward-Compatible Upgrades — Seamless Legacy Module Replacement

Hardware and communication protocols are backward-compatible with the legacy Avago HFBR modules, enabling direct replacement in existing equipment designs without firmware changes, PCB modifications, or re-qualification of the host system. This is a critical cost advantage when upgrading or maintaining installed equipment that uses Avago HFBR-1414 or HFBR-2412 series components at end-of-life.

Note: The HFBR-1414x-Z series (DT-1414) is a TRANSMITTER ONLY — it does not include a receiver. Pair with a compatible receiver module (DT-2412 / HFBR-2412x-Z) at the far end for a complete optical link. The HFBR-2412x-Z (DT-2412) and HFBR-2412x-NP-Z (DT-2412NP) variants include both TX and RX. Verify the required variant before ordering.

OEM Cross-Reference Table

Full part number family coverage — Avago HFBR series → GIGAC DT-Series replacement.

Avago OEM Part Number	GIGAC Compatible	Key Variant Note
HFBR-1414x-Z	DT-1414 series	Transmitter variant (x = connector sub-type)
HFBR-2412x-Z	DT-2412 series	Transceiver variant (standard)
HFBR-2412x-NP-Z	DT-2412NP series	Transceiver — no panel mount

The 'x' in part number denotes connector sub-type. Contact our technical team for the full x-variant list and corresponding GIGAC model suffix.

Typical Applications

Industrial control links — PLCs, motor control networks, high-noise environments

Digital cross-connect systems, modems, and multiplexers

Computer peripheral fiber links — monitors, storage devices, data centers

Military communication systems — field radio, tactical data link

Avionics data bus and ground support equipment fiber links

Defense electronics requiring conformal coating and wide temperature range

Panel-mount industrial equipment fiber interfaces

Replacement for HFBR-1414 / HFBR-2412 in existing equipment at EOL

Compatibility and Deployment

The DT-Series modules are pin-compatible replacements for their corresponding Avago HFBR part numbers. They mount directly in any PCB designed for the HFBR-1414x-Z, HFBR-2412x-Z, or HFBR-2412x-NP-Z using the same through-hole footprint. The threaded ST interface accepts standard ST multimode fiber patch cords. Select transmitter (DT-1414) or transceiver (DT-2412 / DT-2412NP) based on your link topology.

For complete link deployment: if using DT-1414 (transmitter only), pair with a compatible DT-2412 receiver module at the far end. All variants support the same four multimode fiber types and the same TTL/+5V electrical interface. Contact our technical team for full x-variant part number list, datasheet, military application notes, or volume pricing.

FAQ Module

Q: What is the key difference between VCSEL and LED optical transmitters?

A: VCSEL (Vertical-Cavity Surface-Emitting Laser) produces coherent, laser-quality optical output with higher power and narrower spectral bandwidth than LED at 820nm. This gives VCSEL modules significantly longer reach (up to 2.7km for this series vs shorter LED distances), better modulation bandwidth, and greater optical link budget margin — at the cost of slightly higher forward current requirements (60–100mA vs lower LED drive currents).

Q: What Avago part numbers does this series replace?

A: The GIGAC DT-Series replaces three Avago (Broadcom) HFBR part number families: HFBR-1414x-Z (transmitter only), HFBR-2412x-Z (full transceiver with panel mount), and HFBR-2412x-NP-Z (full transceiver without panel mount). The 'x' in the part number refers to connector sub-type. Contact our technical team for the full x-variant mapping table.

Q: What is the 3/8-32 UNEF-2A thread specification on the ST connector?

A: The 3/8-32 UNEF-2A is a fine thread standard for panel-mount miniature optical connectors used in industrial and military equipment. This threaded engagement provides mechanical locking that resists unscrewing under vibration, shock, and cable tension — unlike bayonet or push-pull connectors. The thread pitch and diameter are standardized, ensuring compatibility with standard multimode ST patch cords and panel bulkheads.

Q: Is this module suitable for military and aerospace applications?

A: Yes. The conformal coating, –40°C to +85°C temperature range, threaded vibration-resistant ST connector, and RoHS/lead-free compliance make this series suitable for military communications, avionics data links, and defense ground support equipment. The conformal coating provides resistance to salt fog, humidity, and chemical contamination encountered in defense deployments.

Q: What is the maximum transmission distance?

A: Up to 2.7km over multimode fiber, achieved by the VCSEL's high optical output power. Actual maximum distance depends on fiber type (50/125μm MMF provides the longest reach), connector quality, and accumulated optical losses. Use the optical link budget from the product datasheet to verify the achievable distance for your specific fiber installation.

Q: Can I replace HFBR-1414 modules directly with DT-1414 without PCB changes?

A: Yes. The GIGAC DT-1414 is pin-compatible with the HFBR-1414x-Z using the same through-hole PCB footprint. No PCB layout modifications, firmware changes, or host system re-qualification are required. The same through-hole footprint and +5V/TTL interface ensure direct drop-in substitution in existing equipment designs.